assert "rn != NULL" failed in pipex.c (2)
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syzbot
Mar 20, 2026, 6:09:22 AM (12 days ago) Mar 20
to syzkaller-o...@googlegroups.com
Hello,
syzbot found the following issue on:
HEAD commit: f53d362946f9 add basic 802.11ax support to net80211
git tree: openbsd
console output: https://syzkaller.appspot.com/x/log.txt?x=1096f352580000
kernel config: https://syzkaller.appspot.com/x/.config?x=7058272de1526588
dashboard link: https://syzkaller.appspot.com/bug?extid=d1f086346c30d1a059f0
Unfortunately, I don't have any reproducer for this issue yet.
Downloadable assets:
disk image: https://storage.googleapis.com/syzbot-assets/fe36037add68/disk-f53d3629.raw.xz
bsd.gdb: https://storage.googleapis.com/syzbot-assets/2f2449a2010a/bsd-f53d3629.gdb.xz
kernel image: https://storage.googleapis.com/syzbot-assets/4e20baef239c/kernel-f53d3629.xz
IMPORTANT: if you fix the issue, please add the following tag to the commit:
Reported-by: syzbot+d1f086...@syzkaller.appspotmail.com
panic: kernel diagnostic assertion "rn != NULL" failed: file "/syzkaller/managers/multicore/kernel/sys/net/pipex.c", line 459
Stopped at db_enter+0x25: addq $0x8,%rsp
TID PID UID PRFLAGS PFLAGS CPU COMMAND
db_enter() at db_enter+0x25 sys/arch/amd64/amd64/db_interface.c:438
panic(ffffffff834489d1) at panic+0x1e5 sys/kern/subr_prf.c:198
__assert(ffffffff8348a893,ffffffff834a26a1,1cb,ffffffff8344193c) at __assert+0x29 sys/kern/subr_prf.c:-1
pipex_unlink_session_locked(ffff80003afe1bf8) at pipex_unlink_session_locked+0x429
pipex_destroy_all_sessions(ffff800001652000) at pipex_destroy_all_sessions+0xd9 pipex_rele_session sys/net/pipex.c:-1 [inline]
pipex_destroy_all_sessions(ffff800001652000) at pipex_destroy_all_sessions+0xd9 sys/net/pipex.c:151
pppacclose(637e,1,2000,ffff8000fffee7e0) at pppacclose+0x16f sys/net/if_pppx.c:1335
spec_close(ffff80003c40f510) at spec_close+0x417 sys/kern/spec_vnops.c:-1
VOP_CLOSE(fffffd8070b82998,1,fffffd80097fd618,ffff8000fffee7e0) at VOP_CLOSE+0x132 sys/kern/vfs_vops.c:156
vn_closefile(fffffd80616802f0,ffff8000fffee7e0) at vn_closefile+0x12b vn_close sys/kern/vfs_vnops.c:292 [inline]
vn_closefile(fffffd80616802f0,ffff8000fffee7e0) at vn_closefile+0x12b sys/kern/vfs_vnops.c:615
fdrop(fffffd80616802f0,ffff8000fffee7e0) at fdrop+0x121 sys/kern/kern_descrip.c:1281
closef(fffffd80616802f0,ffff8000fffee7e0) at closef+0x192 sys/kern/kern_descrip.c:1265
fdfree(ffff8000fffee7e0) at fdfree+0x116 sys/kern/kern_descrip.c:1196
exit1(ffff8000fffee7e0,0,0,1) at exit1+0x576 sys/kern/kern_exit.c:215
sys_exit(ffff8000fffee7e0,ffff80003c40f880,ffff80003c40f7d0) at sys_exit+0x1a sys/kern/kern_exit.c:-1
end trace frame: 0xffff80003c40f870, count: 0
https://www.openbsd.org/ddb.html describes the minimum info required in bug
reports. Insufficient info makes it difficult to find and fix bugs.
ddb{0}>
ddb{0}> set $lines = 0
ddb{0}> set $maxwidth = 0
ddb{0}> show panic
*cpu0: kernel diagnostic assertion "rn != NULL" failed: file "/syzkaller/managers/multicore/kernel/sys/net/pipex.c", line 459
ddb{0}> trace
db_enter() at db_enter+0x25 sys/arch/amd64/amd64/db_interface.c:438
panic(ffffffff834489d1) at panic+0x1e5 sys/kern/subr_prf.c:198
__assert(ffffffff8348a893,ffffffff834a26a1,1cb,ffffffff8344193c) at __assert+0x29 sys/kern/subr_prf.c:-1
pipex_unlink_session_locked(ffff80003afe1bf8) at pipex_unlink_session_locked+0x429
pipex_destroy_all_sessions(ffff800001652000) at pipex_destroy_all_sessions+0xd9 pipex_rele_session sys/net/pipex.c:-1 [inline]
pipex_destroy_all_sessions(ffff800001652000) at pipex_destroy_all_sessions+0xd9 sys/net/pipex.c:151
pppacclose(637e,1,2000,ffff8000fffee7e0) at pppacclose+0x16f sys/net/if_pppx.c:1335
spec_close(ffff80003c40f510) at spec_close+0x417 sys/kern/spec_vnops.c:-1
VOP_CLOSE(fffffd8070b82998,1,fffffd80097fd618,ffff8000fffee7e0) at VOP_CLOSE+0x132 sys/kern/vfs_vops.c:156
vn_closefile(fffffd80616802f0,ffff8000fffee7e0) at vn_closefile+0x12b vn_close sys/kern/vfs_vnops.c:292 [inline]
vn_closefile(fffffd80616802f0,ffff8000fffee7e0) at vn_closefile+0x12b sys/kern/vfs_vnops.c:615
fdrop(fffffd80616802f0,ffff8000fffee7e0) at fdrop+0x121 sys/kern/kern_descrip.c:1281
closef(fffffd80616802f0,ffff8000fffee7e0) at closef+0x192 sys/kern/kern_descrip.c:1265
fdfree(ffff8000fffee7e0) at fdfree+0x116 sys/kern/kern_descrip.c:1196
exit1(ffff8000fffee7e0,0,0,1) at exit1+0x576 sys/kern/kern_exit.c:215
sys_exit(ffff8000fffee7e0,ffff80003c40f880,ffff80003c40f7d0) at sys_exit+0x1a sys/kern/kern_exit.c:-1
syscall(ffff80003c40f880) at syscall+0xb17 mi_syscall sys/sys/syscall_mi.h:176 [inline]
syscall(ffff80003c40f880) at syscall+0xb17 sys/arch/amd64/amd64/trap.c:783
Xsyscall() at Xsyscall+0x128
end of kernel
end trace frame: 0x75540f825db0, count: -16
ddb{0}> show registers
rdi 0
rsi 0x1
rbp 0xffff80003c40f2e0
rbx 0xffffffff83877e07 cpu_info_full_primary+0x2e07
rdx 0
rcx 0xffff8000fffee7e0
rax 0xffffffff83876ff0 cpu_info_full_primary+0x1ff0
r8 0x101010101010101
r9 0x8080808080808080
r10 0x76f2da1d447cc196
r11 0x539c22ca3e6e3967
r12 0xffffffff83877c08 cpu_info_full_primary+0x2c08
r13 0
r14 0
r15 0x1
rip 0xffffffff82a473b5 db_enter+0x25
cs 0x8
rflags 0x246
rsp 0xffff80003c40f2d0
ss 0x10
db_enter+0x25: addq $0x8,%rsp
ddb{0}> show proc
PROC (syz-executor) tid=34568 pid=18720 tcnt=0 stat=onproc
flags process=1008<EXITING,SINGLEEXIT> proc=2000<WEXIT>
runpri=32, usrpri=86, slppri=32, nice=20
wchan=0x0, wmesg=, ps_single=0xffff8000fffee7e0 scnt=-1 ecnt=1
forw=0xffffffffffffffff, list=0xffff8000fffee018,0xffff80003c3f7cc0
process=0xffff80002a3a0e88 user=0xffff80003c40a000, vmspace=0xfffffd800b9d6d80
estcpu=36, cpticks=2, pctcpu=0.0, user=0, sys=1, intr=0
ddb{0}> ps
PID TID PPID UID S FLAGS WAIT COMMAND
60772 339282 24673 0 2 0 syz-executor
60772 85255 24673 0 3 0x4000080 fsleep syz-executor
83856 335001 24449 0 3 0 vmmaplk syz-executor
83856 453918 24449 0 2 0x4000000 syz-executor
39181 76722 25816 0 2 0 syz-executor
39181 179747 25816 0 3 0x4000080 kqsel syz-executor
39181 149382 25816 0 3 0x4000080 fsleep syz-executor
39181 453028 25816 0 3 0x4000080 fsleep syz-executor
19177 238136 51269 0 2 0x100002 ndp
51269 78098 8880 0 3 0x10008a sigsusp sh
22505 283492 82324 -1 3 0x90 nanoslp syz-executor
22505 459594 82324 -1 3 0x4000090 kqsel syz-executor
22505 474599 82324 -1 3 0x4000090 fsleep syz-executor
26784 208347 77370 0 3 0x80 nanoslp syz-executor
26784 140871 77370 0 2 0x4000000 syz-executor
26784 120181 77370 0 3 0x4000000 inode syz-executor
26784 317648 77370 0 3 0x4000080 fsleep syz-executor
8880 193386 33376 0 3 0x82 wait syz-executor
84576 404896 1 0 3 0x100083 ttyopn getty
77370 68458 33376 0 3 0x82 nanoslp syz-executor
98435 452231 33376 0 3 0x82 nanoslp syz-executor
16593 510305 59178 27 3 0x1100092 kqread sshd-auth
59178 337496 52718 0 3 0x82 kqread sshd-session
25816 389646 33376 0 3 0x82 nanoslp syz-executor
65754 219131 33376 0 3 0x82 nanoslp syz-executor
24673 384324 33376 0 3 0x82 nanoslp syz-executor
82324 188613 33376 0 3 0x82 nanoslp syz-executor
24449 208103 33376 0 3 0x82 nanoslp syz-executor
33376 139721 88768 0 2 0x2 syz-executor
88768 376973 19812 0 3 0x10008a sigsusp ksh
19812 9785 28899 0 3 0x98 kqread sshd-session
28899 458208 52718 0 3 0x92 kqread sshd-session
52718 26570 1 0 3 0x88 kqread sshd
37496 123418 57702 74 3 0x1100092 bpf pflogd
57702 285866 1 0 3 0x80 sbwait pflogd
33439 133793 86598 73 3 0x1100090 kqread syslogd
86598 318338 1 0 3 0x100082 sbwait syslogd
29051 369012 1 0 2 0x100001 resolvd
39923 328433 13093 77 2 0x100012 dhcpleased
94240 470022 13093 77 3 0x100092 kqread dhcpleased
13093 509431 1 0 3 0x80 kqread dhcpleased
6032 348943 0 0 3 0x14200 bored smr
36238 128600 0 0 2 0x14200 zerothread
28935 51759 0 0 3 0x14200 aiodoned aiodoned
44971 195698 0 0 3 0x14200 syncer update
80554 357416 0 0 3 0x14200 cleaner cleaner
65180 120838 0 0 3 0x14200 reaper reaper
68224 203071 0 0 3 0x14200 pgdaemon pagedaemon
28448 465122 0 0 3 0x14200 bored viomb
41115 221801 0 0 3 0x40014200 acpi0 acpi0
78886 6948 0 0 3 0x40014200 idle1
33118 122225 0 0 3 0x14200 bored softnet1
29416 44520 0 0 3 0x14200 bored softnet0
45278 452749 0 0 3 0x14200 bored systqmp
93337 258971 0 0 3 0x14200 bored systq
56629 507323 0 0 3 0x14200 tmoslp softclockmp
26629 186556 0 0 3 0x40014200 tmoslp softclock
50940 424008 0 0 3 0x40014200 idle0
1 264336 0 0 3 0x82 wait init
0 0 -1 0 3 0x10010200 scheduler swapper
ddb{0}> show all locks
CPU 0:
exclusive mutex /syzkaller/managers/multicore/kernel/sys/net/pipex.c:78 r = 0 (0xffffffff838c8550)
#0 witness_lock+0x5f1 stacktrace_save sys/sys/stacktrace.h:37 [inline]
#0 witness_lock+0x5f1 sys/kern/subr_witness.c:1160
#1 mtx_enter+0x4b4 sys/kern/kern_lock.c:487
#2 pipex_destroy_all_sessions+0x2f sys/net/pipex.c:144
#3 pppacclose+0x16f sys/net/if_pppx.c:1335
#4 spec_close+0x417 sys/kern/spec_vnops.c:-1
#5 VOP_CLOSE+0x132 sys/kern/vfs_vops.c:156
#6 vn_closefile+0x12b vn_close sys/kern/vfs_vnops.c:292 [inline]
#6 vn_closefile+0x12b sys/kern/vfs_vnops.c:615
#7 fdrop+0x121 sys/kern/kern_descrip.c:1281
#8 closef+0x192 sys/kern/kern_descrip.c:1265
#9 fdfree+0x116 sys/kern/kern_descrip.c:1196
#10 exit1+0x576 sys/kern/kern_exit.c:215
#11 sys_exit+0x1a sys/kern/kern_exit.c:-1
#12 syscall+0xb17 mi_syscall sys/sys/syscall_mi.h:176 [inline]
#12 syscall+0xb17 sys/arch/amd64/amd64/trap.c:783
#13 Xsyscall+0x128
CPU 1:
exclusive mutex &pmap->pm_mtx r = 0 (0xfffffd807708b210)
#0 witness_lock+0x5f1 stacktrace_save sys/sys/stacktrace.h:37 [inline]
#0 witness_lock+0x5f1 sys/kern/subr_witness.c:1160
#1 mtx_enter+0x4b4 sys/kern/kern_lock.c:487
#2 pmap_do_remove+0xa9 rcr3 sys/arch/amd64/compile/SYZKALLER/obj/machine/cpufunc.h:139 [inline]
#2 pmap_do_remove+0xa9 pmap_map_ptes sys/arch/amd64/amd64/pmap.c:437 [inline]
#2 pmap_do_remove+0xa9 sys/arch/amd64/amd64/pmap.c:1824
#3 uvm_unmap_kill_entry_withlock+0x269 sys/uvm/uvm_map.c:1869
#4 uvm_map_teardown+0x117 uvm_map_addr_RBT_LEFT sys/uvm/uvm_map.h:-1 [inline]
#4 uvm_map_teardown+0x117 sys/uvm/uvm_map.c:2497
#5 exit1+0x6fc sys/kern/kern_exit.c:260
#6 sys_exit+0x1a sys/kern/kern_exit.c:-1
#7 syscall+0xb17 mi_syscall sys/sys/syscall_mi.h:176 [inline]
#7 syscall+0xb17 sys/arch/amd64/amd64/trap.c:783
#8 Xsyscall+0x128
Process 60772 (syz-executor) thread 0xffff80003c3f62c0 (339282)
exclusive rwlock vmmaplk r = 0 (0xfffffd806c7aa120)
#0 witness_lock+0x5f1 stacktrace_save sys/sys/stacktrace.h:37 [inline]
#0 witness_lock+0x5f1 sys/kern/subr_witness.c:1160
#1 rw_do_enter_write+0x419 sys/kern/kern_rwlock.c:320
#2 vm_map_lock_ln+0x12e sys/uvm/uvm_map.c:5171
#3 uvm_map_protect+0xe0 sys/uvm/uvm_map.c:3075
#4 sys_mprotect+0x351 sys/uvm/uvm_mmap.c:590
#5 syscall+0xbd4 mi_syscall sys/sys/syscall_mi.h:176 [inline]
#5 syscall+0xbd4 sys/arch/amd64/amd64/trap.c:783
#6 Xsyscall+0x128
Process 83856 (syz-executor) thread 0xffff80003c3f74e8 (453918)
exclusive rwlock vmmaplk r = 0 (0xfffffd800b9d6310)
#0 witness_lock+0x5f1 stacktrace_save sys/sys/stacktrace.h:37 [inline]
#0 witness_lock+0x5f1 sys/kern/subr_witness.c:1160
#1 rw_do_enter_read+0x3e8 sys/kern/kern_rwlock.c:413
#2 uvmfault_lookup+0x122 sys/uvm/uvm_fault.c:1880
#3 uvm_fault_check+0x4f sys/uvm/uvm_fault.c:693
#4 uvm_fault+0x106 sys/uvm/uvm_fault.c:627
#5 upageflttrap+0xa9 sys/arch/amd64/amd64/trap.c:192
#6 usertrap+0x430 sys/arch/amd64/amd64/trap.c:640
#7 recall_trap+0x8
Process 26784 (syz-executor) thread 0xffff80003c3f67f0 (140871)
exclusive rrwlock inode r = 0 (0xfffffd806e0d7b10)
#0 witness_lock+0x5f1 stacktrace_save sys/sys/stacktrace.h:37 [inline]
#0 witness_lock+0x5f1 sys/kern/subr_witness.c:1160
#1 rw_do_enter_write+0x419 sys/kern/kern_rwlock.c:320
#2 rrw_enter+0xc6 sys/kern/kern_rwlock.c:621
#3 VOP_LOCK+0xbd sys/kern/vfs_vops.c:527
#4 vn_lock+0xa4 sys/kern/vfs_vnops.c:570
#5 vn_write+0x18f sys/kern/vfs_vnops.c:405
#6 dofilewritev+0x2bd sys/kern/sys_generic.c:384
#7 sys_write+0xa2 sys/kern/sys_generic.c:300
#8 syscall+0xbd4 mi_syscall sys/sys/syscall_mi.h:176 [inline]
#8 syscall+0xbd4 sys/arch/amd64/amd64/trap.c:783
#9 Xsyscall+0x128
ddb{0}> show malloc
Type InUse MemUse HighUse Limit Requests Type Lim
devbuf 11106 12110K 12473K 166960K 13571 0
pcb 17 19K 22K 166960K 408 0
rtable 252 13K 13K 166960K 826 0
pf 37 18K 82K 166960K 188 0
ifaddr 43 8K 8K 166960K 134 0
ifgroup 55 2K 3K 166960K 230 0
sysctl 4 1K 9K 166960K 12 0
counters 72 37K 39K 166960K 280 0
ioctlops 0 0K 4K 166960K 1727 0
iov 0 0K 28K 166960K 70 0
mount 1 1K 1K 166960K 1 0
log 0 0K 0K 166960K 4 0
vnodes 1350 85K 86K 166960K 2581 0
UFS quota 1 32K 32K 166960K 1 0
UFS mount 5 36K 36K 166960K 5 0
shm 2 1K 9K 166960K 14 0
VM map 2 1K 1K 166960K 2 0
sem 12 0K 0K 166960K 122 0
dirhash 12 2K 2K 166960K 33 0
ACPI 1692 195K 286K 166960K 12470 0
file desc 18 65K 102K 166960K 1387 0
sigio 0 0K 0K 166960K 16 0
proc 73 115K 164K 166960K 807 0
subproc 72 4K 4K 166960K 108 0
NFS srvsock 1 0K 0K 166960K 1 0
NFS daemon 1 16K 16K 166960K 1 0
ip_moptions 0 0K 0K 166960K 269 0
in_multi 90 6K 7K 166960K 189 0
ether_multi 1 0K 0K 166960K 14 0
mrt 3 0K 0K 166960K 33 0
ISOFS mount 1 32K 32K 166960K 1 0
MSDOSFS mount 1 16K 16K 166960K 1 0
ttys 271 1208K 1208K 166960K 271 0
exec 0 0K 1K 166960K 608 0
fusefs mount 1 32K 32K 166960K 1 0
pfkey data 0 0K 0K 166960K 2 0
tdb 3 0K 0K 166960K 3 0
VM swap 8 62K 64K 166960K 10 0
UVM amap 257 178K 195K 166960K 14643 0
UVM aobj 76 21K 21K 166960K 80 0
pinsyscall 48 96K 106K 166960K 2663 0
memdesc 1 4K 4K 166960K 1 0
crypto data 1 1K 1K 166960K 1 0
ip6_options 2 0K 0K 166960K 102 0
NDP 14 0K 2K 166960K 98 0
temp 142 9084K 9159K 166960K 61402 0
kqueue 15 24K 34K 166960K 284 0
SYN cache 2 16K 16K 166960K 2 0
ddb{0}> show all pools
Name Size Requests Fail Releases Pgreq Pgrel Npage Hiwat Minpg Maxpg Idle
plcache 128 26 0 0 1 0 1 1 0 8 0
rtpcb 120 138 0 134 1 0 1 1 0 8 0
rtentry 176 242 0 146 6 0 6 6 0 8 0
unpcb 144 729 0 706 5 4 1 2 0 8 0
syncache 336 6 0 6 3 3 0 1 0 8 0
tcpcb 736 490 0 484 19 13 6 10 0 8 5
arp 136 28 0 12 1 0 1 1 0 8 0
inpcb 328 1716 0 1705 31 23 8 13 0 8 6
ip6q 72 1 0 1 1 1 0 1 0 8 0
ip6af 40 2 0 2 1 1 0 1 0 8 0
nd6 152 40 0 16 2 0 2 2 0 8 1
pkpcb 40 10 0 10 4 3 1 1 0 8 1
kcovpl 48 12 0 4 1 0 1 1 0 8 0
ppxss 1192 85 0 84 2 1 1 1 0 8 0
pppxif 1504 6 0 6 3 3 0 1 0 8 0
pfstscr 40 1 0 1 1 1 0 1 0 8 0
pffrag 232 11 0 6 1 0 1 1 0 482 0
pffrnode 88 11 0 6 1 0 1 1 0 8 0
pffrent 40 19 0 14 1 0 1 1 0 8 0
pfosfp 40 1428 0 1005 5 0 5 5 0 8 0
pfosfpen 112 1428 0 714 21 0 21 21 0 8 0
pfrktable 1344 1 0 1 1 1 0 1 0 8 0
pfsrclim 320 1 0 1 1 1 0 1 0 8 0
pfstitem 24 109 0 55 1 0 1 1 0 8 0
pfstkey 128 112 0 58 2 0 2 2 0 8 0
pfstate 448 110 0 57 8 1 7 7 0 8 0
pfrule 1360 22 0 17 2 1 1 2 0 8 0
rttmr 136 3 0 3 2 2 0 1 0 8 0
art_heap8 4096 3 0 0 3 0 3 3 0 8 0
art_heap4 256 744 0 321 34 7 27 31 0 8 0
art_table 40 747 0 321 5 0 5 5 0 8 0
art_node 32 242 0 157 2 1 1 2 0 8 0
sysvmsgpl 40 61 0 43 1 0 1 1 0 8 0
semupl 112 1 0 1 1 1 0 1 0 8 0
semapl 112 120 0 110 1 0 1 1 0 8 0
shmpl 112 69 0 4 2 0 2 2 0 8 0
dirhash 1024 32 0 15 3 0 3 3 0 8 0
dino2pl 256 4267 0 2796 93 0 93 93 0 8 0
ffsino 296 4267 0 2796 114 0 114 114 0 8 0
nchpl 144 6120 0 4403 64 0 64 64 0 8 0
rtmask 32 24 0 23 3 2 1 1 0 8 0
vnodes 216 4869 0 0 271 0 271 271 0 8 0
namei 1024 21031 0 21031 4 2 2 2 0 8 2
percpumem 16 155 0 104 1 0 1 1 0 8 0
vcpupl 3968 8 0 0 1 0 1 1 0 8 0
vmpool 848 8 0 0 1 0 1 1 0 8 0
kstatmem 264 152 0 124 5 2 3 3 0 8 1
scsiplug 72 2 0 2 1 0 1 1 0 8 1
scxspl 216 38421 0 38421 16 15 1 8 1 8 1
plimitpl 152 514 0 496 1 0 1 1 0 8 0
sigapl 424 1696 0 1645 7 1 6 7 0 8 0
knotepl 120 729 0 0 22 0 22 22 0 8 0
kqueuepl 224 416 0 402 5 3 2 2 0 8 0
pipepl 344 282 0 254 9 6 3 6 0 8 0
fdescpl 528 1677 0 1643 3 0 3 3 0 8 0
filepl 160 10174 0 9943 23 9 14 16 0 8 2
lockfpl 104 642 0 639 2 1 1 2 0 8 0
lockfspl 48 257 0 254 1 0 1 1 0 8 0
sessionpl 144 32 0 22 1 0 1 1 0 8 0
pgrppl 48 106 0 88 1 0 1 1 0 8 0
ucredpl 104 1926 0 1910 1 0 1 1 0 8 0
zombiepl 144 2364 0 2362 1 0 1 1 0 8 0
processpl 1232 1696 0 1645 5 0 5 5 0 8 0
procpl 664 3931 0 3870 8 2 6 7 0 8 0
sosppl 176 11 0 11 4 4 0 1 0 8 0
sockpl 752 2636 0 2598 39 27 12 18 0 8 7
mcl64k 65536 7 0 0 1 0 1 1 0 8 0
mcl16k 16384 3 0 0 1 0 1 1 0 8 0
mcl12k 12288 2 0 0 1 0 1 1 0 8 0
mcl9k 9216 2 0 0 1 0 1 1 0 8 0
mcl8k 8192 8 0 0 1 0 1 1 0 8 0
mcl4k 4096 126 0 0 16 0 16 16 0 8 0
mcl2k 2048 28 0 0 4 0 4 4 0 8 0
mtagpl 96 3 0 0 1 0 1 1 0 8 0
mbufpl 256 1202 0 0 73 0 73 73 0 8 0
bufpl 280 15300 0 9170 439 0 439 439 0 8 0
anonpl 32 14344 0 0 116 0 116 116 0 246 0
amapchunkpl 152 49458 0 48958 45 17 28 35 0 158 2
amappl16 200 5818 0 5773 85 71 14 33 0 8 8
amappl15 192 9 0 9 2 2 0 1 0 8 0
amappl14 184 493 0 491 1 0 1 1 0 8 0
amappl13 176 136 0 121 1 0 1 1 0 8 0
amappl12 168 1957 0 1925 2 0 2 2 0 8 0
amappl11 160 4 0 4 1 1 0 1 0 8 0
amappl10 152 77 0 62 1 0 1 1 0 8 0
amappl9 144 275 0 275 1 1 0 1 0 8 0
amappl8 136 121 0 118 1 0 1 1 0 8 0
amappl7 128 171 0 155 1 0 1 1 0 8 0
amappl6 120 211 0 209 1 0 1 1 0 8 0
amappl5 112 99 0 85 1 0 1 1 0 8 0
amappl4 104 350 0 330 1 0 1 1 0 8 0
amappl3 96 10076 0 9964 4 0 4 4 0 8 0
amappl2 88 606 0 528 2 0 2 2 0 8 0
amappl1 80 16471 0 15670 23 4 19 20 0 8 0
amappl 88 13610 0 13441 5 0 5 5 0 92 0
uvmvnodes 80 155 0 0 4 0 4 4 0 8 0
dma4096 4096 1 0 1 1 1 0 1 0 8 0
dma1024 1024 1 0 0 1 0 1 1 0 8 0
dma512 512 1 0 1 1 1 0 1 0 8 0
dma256 256 6 0 6 1 1 0 1 0 8 0
dma128 128 254 0 254 2 1 1 1 0 8 1
dma64 64 6 0 6 1 1 0 1 0 8 0
dma32 32 7 0 7 1 1 0 1 0 8 0
dma16 16 20 0 19 1 0 1 1 0 8 0
aobjpl 72 79 0 4 2 0 2 2 0 8 0
uaddrrnd 24 1677 0 1643 1 0 1 1 0 8 0
uaddrbest 32 2 0 0 1 0 1 1 0 8 0
uaddr 24 1677 0 1643 1 0 1 1 0 8 0
vmmpekpl 168 15161 0 15106 3 0 3 3 0 8 0
vmmpepl 168 114402 0 112173 149 28 121 125 0 357 10
vmsppl 488 1676 0 1642 6 1 5 5 0 8 0
rwobjpl 80 33367 0 31949 47 8 39 39 0 8 0
pdppl 4096 3377 0 3292 126 41 85 86 0 8 0
pvpl 32 25295 0 0 204 0 204 204 0 265 0
pmappl 256 1684 0 1642 3 0 3 3 0 8 0
extentpl 40 45 0 27 1 0 1 1 0 8 0
phpool 112 398 0 71 10 0 10 10 0 8 0
ddb{0}> machine ddbcpu 0
Invalid cpu 0
ddb{0}> trace
db_enter() at db_enter+0x25 sys/arch/amd64/amd64/db_interface.c:438
panic(ffffffff834489d1) at panic+0x1e5 sys/kern/subr_prf.c:198
__assert(ffffffff8348a893,ffffffff834a26a1,1cb,ffffffff8344193c) at __assert+0x29 sys/kern/subr_prf.c:-1
pipex_unlink_session_locked(ffff80003afe1bf8) at pipex_unlink_session_locked+0x429
pipex_destroy_all_sessions(ffff800001652000) at pipex_destroy_all_sessions+0xd9 pipex_rele_session sys/net/pipex.c:-1 [inline]
pipex_destroy_all_sessions(ffff800001652000) at pipex_destroy_all_sessions+0xd9 sys/net/pipex.c:151
pppacclose(637e,1,2000,ffff8000fffee7e0) at pppacclose+0x16f sys/net/if_pppx.c:1335
spec_close(ffff80003c40f510) at spec_close+0x417 sys/kern/spec_vnops.c:-1
VOP_CLOSE(fffffd8070b82998,1,fffffd80097fd618,ffff8000fffee7e0) at VOP_CLOSE+0x132 sys/kern/vfs_vops.c:156
vn_closefile(fffffd80616802f0,ffff8000fffee7e0) at vn_closefile+0x12b vn_close sys/kern/vfs_vnops.c:292 [inline]
vn_closefile(fffffd80616802f0,ffff8000fffee7e0) at vn_closefile+0x12b sys/kern/vfs_vnops.c:615
fdrop(fffffd80616802f0,ffff8000fffee7e0) at fdrop+0x121 sys/kern/kern_descrip.c:1281
closef(fffffd80616802f0,ffff8000fffee7e0) at closef+0x192 sys/kern/kern_descrip.c:1265
fdfree(ffff8000fffee7e0) at fdfree+0x116 sys/kern/kern_descrip.c:1196
exit1(ffff8000fffee7e0,0,0,1) at exit1+0x576 sys/kern/kern_exit.c:215
sys_exit(ffff8000fffee7e0,ffff80003c40f880,ffff80003c40f7d0) at sys_exit+0x1a sys/kern/kern_exit.c:-1
syscall(ffff80003c40f880) at syscall+0xb17 mi_syscall sys/sys/syscall_mi.h:176 [inline]
syscall(ffff80003c40f880) at syscall+0xb17 sys/arch/amd64/amd64/trap.c:783
Xsyscall() at Xsyscall+0x128
end of kernel
end trace frame: 0x75540f825db0, count: -16
ddb{0}> machine ddbcpu 1
Stopped at x86_ipi_db+0x27: addq $0x8,%rsp
x86_ipi_db(ffff8000299bdff0) at x86_ipi_db+0x27 sys/arch/amd64/amd64/db_interface.c:394
x86_ipi_handler() at x86_ipi_handler+0xd9 sys/arch/amd64/amd64/ipi.c:106
Xresume_lapic_ipi() at Xresume_lapic_ipi+0x27
__mp_lock(ffffffff83966ac0) at __mp_lock+0x192 __mp_lock_spin sys/kern/kern_lock.c:142 [inline]
__mp_lock(ffffffff83966ac0) at __mp_lock+0x192 sys/kern/kern_lock.c:173
exit1(ffff800036fd0550,0,0,1) at exit1+0x701 sys/kern/kern_exit.c:260
sys_exit(ffff800036fd0550,ffff80003c3e5060,ffff80003c3e4fb0) at sys_exit+0x1a sys/kern/kern_exit.c:-1
syscall(ffff80003c3e5060) at syscall+0xb17 mi_syscall sys/sys/syscall_mi.h:176 [inline]
syscall(ffff80003c3e5060) at syscall+0xb17 sys/arch/amd64/amd64/trap.c:783
Xsyscall() at Xsyscall+0x128
end of kernel
end trace frame: 0x7e0efa099190, count: 7
ddb{1}> trace
x86_ipi_db(ffff8000299bdff0) at x86_ipi_db+0x27 sys/arch/amd64/amd64/db_interface.c:394
x86_ipi_handler() at x86_ipi_handler+0xd9 sys/arch/amd64/amd64/ipi.c:106
Xresume_lapic_ipi() at Xresume_lapic_ipi+0x27
__mp_lock(ffffffff83966ac0) at __mp_lock+0x192 __mp_lock_spin sys/kern/kern_lock.c:142 [inline]
__mp_lock(ffffffff83966ac0) at __mp_lock+0x192 sys/kern/kern_lock.c:173
exit1(ffff800036fd0550,0,0,1) at exit1+0x701 sys/kern/kern_exit.c:260
sys_exit(ffff800036fd0550,ffff80003c3e5060,ffff80003c3e4fb0) at sys_exit+0x1a sys/kern/kern_exit.c:-1
syscall(ffff80003c3e5060) at syscall+0xb17 mi_syscall sys/sys/syscall_mi.h:176 [inline]
syscall(ffff80003c3e5060) at syscall+0xb17 sys/arch/amd64/amd64/trap.c:783
Xsyscall() at Xsyscall+0x128
end of kernel
end trace frame: 0x7e0efa099190, count: -8
---
This report is generated by a bot. It may contain errors.
See https://goo.gl/tpsmEJ for more information about syzbot.
syzbot engineers can be reached at syzk...@googlegroups.com.
syzbot will keep track of this issue. See:
https://goo.gl/tpsmEJ#status for how to communicate with syzbot.
If the report is already addressed, let syzbot know by replying with:
#syz fix: exact-commit-title
If you want to overwrite report's subsystems, reply with:
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(See the list of subsystem names on the web dashboard)
If the report is a duplicate of another one, reply with:
#syz dup: exact-subject-of-another-report
If you want to undo deduplication, reply with:
#syz undup
syzbot found the following issue on:
HEAD commit: f53d362946f9 add basic 802.11ax support to net80211
git tree: openbsd
console output: https://syzkaller.appspot.com/x/log.txt?x=1096f352580000
kernel config: https://syzkaller.appspot.com/x/.config?x=7058272de1526588
dashboard link: https://syzkaller.appspot.com/bug?extid=d1f086346c30d1a059f0
Unfortunately, I don't have any reproducer for this issue yet.
Downloadable assets:
disk image: https://storage.googleapis.com/syzbot-assets/fe36037add68/disk-f53d3629.raw.xz
bsd.gdb: https://storage.googleapis.com/syzbot-assets/2f2449a2010a/bsd-f53d3629.gdb.xz
kernel image: https://storage.googleapis.com/syzbot-assets/4e20baef239c/kernel-f53d3629.xz
IMPORTANT: if you fix the issue, please add the following tag to the commit:
Reported-by: syzbot+d1f086...@syzkaller.appspotmail.com
panic: kernel diagnostic assertion "rn != NULL" failed: file "/syzkaller/managers/multicore/kernel/sys/net/pipex.c", line 459
Stopped at db_enter+0x25: addq $0x8,%rsp
TID PID UID PRFLAGS PFLAGS CPU COMMAND
db_enter() at db_enter+0x25 sys/arch/amd64/amd64/db_interface.c:438
panic(ffffffff834489d1) at panic+0x1e5 sys/kern/subr_prf.c:198
__assert(ffffffff8348a893,ffffffff834a26a1,1cb,ffffffff8344193c) at __assert+0x29 sys/kern/subr_prf.c:-1
pipex_unlink_session_locked(ffff80003afe1bf8) at pipex_unlink_session_locked+0x429
pipex_destroy_all_sessions(ffff800001652000) at pipex_destroy_all_sessions+0xd9 pipex_rele_session sys/net/pipex.c:-1 [inline]
pipex_destroy_all_sessions(ffff800001652000) at pipex_destroy_all_sessions+0xd9 sys/net/pipex.c:151
pppacclose(637e,1,2000,ffff8000fffee7e0) at pppacclose+0x16f sys/net/if_pppx.c:1335
spec_close(ffff80003c40f510) at spec_close+0x417 sys/kern/spec_vnops.c:-1
VOP_CLOSE(fffffd8070b82998,1,fffffd80097fd618,ffff8000fffee7e0) at VOP_CLOSE+0x132 sys/kern/vfs_vops.c:156
vn_closefile(fffffd80616802f0,ffff8000fffee7e0) at vn_closefile+0x12b vn_close sys/kern/vfs_vnops.c:292 [inline]
vn_closefile(fffffd80616802f0,ffff8000fffee7e0) at vn_closefile+0x12b sys/kern/vfs_vnops.c:615
fdrop(fffffd80616802f0,ffff8000fffee7e0) at fdrop+0x121 sys/kern/kern_descrip.c:1281
closef(fffffd80616802f0,ffff8000fffee7e0) at closef+0x192 sys/kern/kern_descrip.c:1265
fdfree(ffff8000fffee7e0) at fdfree+0x116 sys/kern/kern_descrip.c:1196
exit1(ffff8000fffee7e0,0,0,1) at exit1+0x576 sys/kern/kern_exit.c:215
sys_exit(ffff8000fffee7e0,ffff80003c40f880,ffff80003c40f7d0) at sys_exit+0x1a sys/kern/kern_exit.c:-1
end trace frame: 0xffff80003c40f870, count: 0
https://www.openbsd.org/ddb.html describes the minimum info required in bug
reports. Insufficient info makes it difficult to find and fix bugs.
ddb{0}>
ddb{0}> set $lines = 0
ddb{0}> set $maxwidth = 0
ddb{0}> show panic
*cpu0: kernel diagnostic assertion "rn != NULL" failed: file "/syzkaller/managers/multicore/kernel/sys/net/pipex.c", line 459
ddb{0}> trace
db_enter() at db_enter+0x25 sys/arch/amd64/amd64/db_interface.c:438
panic(ffffffff834489d1) at panic+0x1e5 sys/kern/subr_prf.c:198
__assert(ffffffff8348a893,ffffffff834a26a1,1cb,ffffffff8344193c) at __assert+0x29 sys/kern/subr_prf.c:-1
pipex_unlink_session_locked(ffff80003afe1bf8) at pipex_unlink_session_locked+0x429
pipex_destroy_all_sessions(ffff800001652000) at pipex_destroy_all_sessions+0xd9 pipex_rele_session sys/net/pipex.c:-1 [inline]
pipex_destroy_all_sessions(ffff800001652000) at pipex_destroy_all_sessions+0xd9 sys/net/pipex.c:151
pppacclose(637e,1,2000,ffff8000fffee7e0) at pppacclose+0x16f sys/net/if_pppx.c:1335
spec_close(ffff80003c40f510) at spec_close+0x417 sys/kern/spec_vnops.c:-1
VOP_CLOSE(fffffd8070b82998,1,fffffd80097fd618,ffff8000fffee7e0) at VOP_CLOSE+0x132 sys/kern/vfs_vops.c:156
vn_closefile(fffffd80616802f0,ffff8000fffee7e0) at vn_closefile+0x12b vn_close sys/kern/vfs_vnops.c:292 [inline]
vn_closefile(fffffd80616802f0,ffff8000fffee7e0) at vn_closefile+0x12b sys/kern/vfs_vnops.c:615
fdrop(fffffd80616802f0,ffff8000fffee7e0) at fdrop+0x121 sys/kern/kern_descrip.c:1281
closef(fffffd80616802f0,ffff8000fffee7e0) at closef+0x192 sys/kern/kern_descrip.c:1265
fdfree(ffff8000fffee7e0) at fdfree+0x116 sys/kern/kern_descrip.c:1196
exit1(ffff8000fffee7e0,0,0,1) at exit1+0x576 sys/kern/kern_exit.c:215
sys_exit(ffff8000fffee7e0,ffff80003c40f880,ffff80003c40f7d0) at sys_exit+0x1a sys/kern/kern_exit.c:-1
syscall(ffff80003c40f880) at syscall+0xb17 mi_syscall sys/sys/syscall_mi.h:176 [inline]
syscall(ffff80003c40f880) at syscall+0xb17 sys/arch/amd64/amd64/trap.c:783
Xsyscall() at Xsyscall+0x128
end of kernel
end trace frame: 0x75540f825db0, count: -16
ddb{0}> show registers
rdi 0
rsi 0x1
rbp 0xffff80003c40f2e0
rbx 0xffffffff83877e07 cpu_info_full_primary+0x2e07
rdx 0
rcx 0xffff8000fffee7e0
rax 0xffffffff83876ff0 cpu_info_full_primary+0x1ff0
r8 0x101010101010101
r9 0x8080808080808080
r10 0x76f2da1d447cc196
r11 0x539c22ca3e6e3967
r12 0xffffffff83877c08 cpu_info_full_primary+0x2c08
r13 0
r14 0
r15 0x1
rip 0xffffffff82a473b5 db_enter+0x25
cs 0x8
rflags 0x246
rsp 0xffff80003c40f2d0
ss 0x10
db_enter+0x25: addq $0x8,%rsp
ddb{0}> show proc
PROC (syz-executor) tid=34568 pid=18720 tcnt=0 stat=onproc
flags process=1008<EXITING,SINGLEEXIT> proc=2000<WEXIT>
runpri=32, usrpri=86, slppri=32, nice=20
wchan=0x0, wmesg=, ps_single=0xffff8000fffee7e0 scnt=-1 ecnt=1
forw=0xffffffffffffffff, list=0xffff8000fffee018,0xffff80003c3f7cc0
process=0xffff80002a3a0e88 user=0xffff80003c40a000, vmspace=0xfffffd800b9d6d80
estcpu=36, cpticks=2, pctcpu=0.0, user=0, sys=1, intr=0
ddb{0}> ps
PID TID PPID UID S FLAGS WAIT COMMAND
60772 339282 24673 0 2 0 syz-executor
60772 85255 24673 0 3 0x4000080 fsleep syz-executor
83856 335001 24449 0 3 0 vmmaplk syz-executor
83856 453918 24449 0 2 0x4000000 syz-executor
39181 76722 25816 0 2 0 syz-executor
39181 179747 25816 0 3 0x4000080 kqsel syz-executor
39181 149382 25816 0 3 0x4000080 fsleep syz-executor
39181 453028 25816 0 3 0x4000080 fsleep syz-executor
19177 238136 51269 0 2 0x100002 ndp
51269 78098 8880 0 3 0x10008a sigsusp sh
22505 283492 82324 -1 3 0x90 nanoslp syz-executor
22505 459594 82324 -1 3 0x4000090 kqsel syz-executor
22505 474599 82324 -1 3 0x4000090 fsleep syz-executor
26784 208347 77370 0 3 0x80 nanoslp syz-executor
26784 140871 77370 0 2 0x4000000 syz-executor
26784 120181 77370 0 3 0x4000000 inode syz-executor
26784 317648 77370 0 3 0x4000080 fsleep syz-executor
8880 193386 33376 0 3 0x82 wait syz-executor
84576 404896 1 0 3 0x100083 ttyopn getty
77370 68458 33376 0 3 0x82 nanoslp syz-executor
98435 452231 33376 0 3 0x82 nanoslp syz-executor
16593 510305 59178 27 3 0x1100092 kqread sshd-auth
59178 337496 52718 0 3 0x82 kqread sshd-session
25816 389646 33376 0 3 0x82 nanoslp syz-executor
65754 219131 33376 0 3 0x82 nanoslp syz-executor
24673 384324 33376 0 3 0x82 nanoslp syz-executor
82324 188613 33376 0 3 0x82 nanoslp syz-executor
24449 208103 33376 0 3 0x82 nanoslp syz-executor
33376 139721 88768 0 2 0x2 syz-executor
88768 376973 19812 0 3 0x10008a sigsusp ksh
19812 9785 28899 0 3 0x98 kqread sshd-session
28899 458208 52718 0 3 0x92 kqread sshd-session
52718 26570 1 0 3 0x88 kqread sshd
37496 123418 57702 74 3 0x1100092 bpf pflogd
57702 285866 1 0 3 0x80 sbwait pflogd
33439 133793 86598 73 3 0x1100090 kqread syslogd
86598 318338 1 0 3 0x100082 sbwait syslogd
29051 369012 1 0 2 0x100001 resolvd
39923 328433 13093 77 2 0x100012 dhcpleased
94240 470022 13093 77 3 0x100092 kqread dhcpleased
13093 509431 1 0 3 0x80 kqread dhcpleased
6032 348943 0 0 3 0x14200 bored smr
36238 128600 0 0 2 0x14200 zerothread
28935 51759 0 0 3 0x14200 aiodoned aiodoned
44971 195698 0 0 3 0x14200 syncer update
80554 357416 0 0 3 0x14200 cleaner cleaner
65180 120838 0 0 3 0x14200 reaper reaper
68224 203071 0 0 3 0x14200 pgdaemon pagedaemon
28448 465122 0 0 3 0x14200 bored viomb
41115 221801 0 0 3 0x40014200 acpi0 acpi0
78886 6948 0 0 3 0x40014200 idle1
33118 122225 0 0 3 0x14200 bored softnet1
29416 44520 0 0 3 0x14200 bored softnet0
45278 452749 0 0 3 0x14200 bored systqmp
93337 258971 0 0 3 0x14200 bored systq
56629 507323 0 0 3 0x14200 tmoslp softclockmp
26629 186556 0 0 3 0x40014200 tmoslp softclock
50940 424008 0 0 3 0x40014200 idle0
1 264336 0 0 3 0x82 wait init
0 0 -1 0 3 0x10010200 scheduler swapper
ddb{0}> show all locks
CPU 0:
exclusive mutex /syzkaller/managers/multicore/kernel/sys/net/pipex.c:78 r = 0 (0xffffffff838c8550)
#0 witness_lock+0x5f1 stacktrace_save sys/sys/stacktrace.h:37 [inline]
#0 witness_lock+0x5f1 sys/kern/subr_witness.c:1160
#1 mtx_enter+0x4b4 sys/kern/kern_lock.c:487
#2 pipex_destroy_all_sessions+0x2f sys/net/pipex.c:144
#3 pppacclose+0x16f sys/net/if_pppx.c:1335
#4 spec_close+0x417 sys/kern/spec_vnops.c:-1
#5 VOP_CLOSE+0x132 sys/kern/vfs_vops.c:156
#6 vn_closefile+0x12b vn_close sys/kern/vfs_vnops.c:292 [inline]
#6 vn_closefile+0x12b sys/kern/vfs_vnops.c:615
#7 fdrop+0x121 sys/kern/kern_descrip.c:1281
#8 closef+0x192 sys/kern/kern_descrip.c:1265
#9 fdfree+0x116 sys/kern/kern_descrip.c:1196
#10 exit1+0x576 sys/kern/kern_exit.c:215
#11 sys_exit+0x1a sys/kern/kern_exit.c:-1
#12 syscall+0xb17 mi_syscall sys/sys/syscall_mi.h:176 [inline]
#12 syscall+0xb17 sys/arch/amd64/amd64/trap.c:783
#13 Xsyscall+0x128
CPU 1:
exclusive mutex &pmap->pm_mtx r = 0 (0xfffffd807708b210)
#0 witness_lock+0x5f1 stacktrace_save sys/sys/stacktrace.h:37 [inline]
#0 witness_lock+0x5f1 sys/kern/subr_witness.c:1160
#1 mtx_enter+0x4b4 sys/kern/kern_lock.c:487
#2 pmap_do_remove+0xa9 rcr3 sys/arch/amd64/compile/SYZKALLER/obj/machine/cpufunc.h:139 [inline]
#2 pmap_do_remove+0xa9 pmap_map_ptes sys/arch/amd64/amd64/pmap.c:437 [inline]
#2 pmap_do_remove+0xa9 sys/arch/amd64/amd64/pmap.c:1824
#3 uvm_unmap_kill_entry_withlock+0x269 sys/uvm/uvm_map.c:1869
#4 uvm_map_teardown+0x117 uvm_map_addr_RBT_LEFT sys/uvm/uvm_map.h:-1 [inline]
#4 uvm_map_teardown+0x117 sys/uvm/uvm_map.c:2497
#5 exit1+0x6fc sys/kern/kern_exit.c:260
#6 sys_exit+0x1a sys/kern/kern_exit.c:-1
#7 syscall+0xb17 mi_syscall sys/sys/syscall_mi.h:176 [inline]
#7 syscall+0xb17 sys/arch/amd64/amd64/trap.c:783
#8 Xsyscall+0x128
Process 60772 (syz-executor) thread 0xffff80003c3f62c0 (339282)
exclusive rwlock vmmaplk r = 0 (0xfffffd806c7aa120)
#0 witness_lock+0x5f1 stacktrace_save sys/sys/stacktrace.h:37 [inline]
#0 witness_lock+0x5f1 sys/kern/subr_witness.c:1160
#1 rw_do_enter_write+0x419 sys/kern/kern_rwlock.c:320
#2 vm_map_lock_ln+0x12e sys/uvm/uvm_map.c:5171
#3 uvm_map_protect+0xe0 sys/uvm/uvm_map.c:3075
#4 sys_mprotect+0x351 sys/uvm/uvm_mmap.c:590
#5 syscall+0xbd4 mi_syscall sys/sys/syscall_mi.h:176 [inline]
#5 syscall+0xbd4 sys/arch/amd64/amd64/trap.c:783
#6 Xsyscall+0x128
Process 83856 (syz-executor) thread 0xffff80003c3f74e8 (453918)
exclusive rwlock vmmaplk r = 0 (0xfffffd800b9d6310)
#0 witness_lock+0x5f1 stacktrace_save sys/sys/stacktrace.h:37 [inline]
#0 witness_lock+0x5f1 sys/kern/subr_witness.c:1160
#1 rw_do_enter_read+0x3e8 sys/kern/kern_rwlock.c:413
#2 uvmfault_lookup+0x122 sys/uvm/uvm_fault.c:1880
#3 uvm_fault_check+0x4f sys/uvm/uvm_fault.c:693
#4 uvm_fault+0x106 sys/uvm/uvm_fault.c:627
#5 upageflttrap+0xa9 sys/arch/amd64/amd64/trap.c:192
#6 usertrap+0x430 sys/arch/amd64/amd64/trap.c:640
#7 recall_trap+0x8
Process 26784 (syz-executor) thread 0xffff80003c3f67f0 (140871)
exclusive rrwlock inode r = 0 (0xfffffd806e0d7b10)
#0 witness_lock+0x5f1 stacktrace_save sys/sys/stacktrace.h:37 [inline]
#0 witness_lock+0x5f1 sys/kern/subr_witness.c:1160
#1 rw_do_enter_write+0x419 sys/kern/kern_rwlock.c:320
#2 rrw_enter+0xc6 sys/kern/kern_rwlock.c:621
#3 VOP_LOCK+0xbd sys/kern/vfs_vops.c:527
#4 vn_lock+0xa4 sys/kern/vfs_vnops.c:570
#5 vn_write+0x18f sys/kern/vfs_vnops.c:405
#6 dofilewritev+0x2bd sys/kern/sys_generic.c:384
#7 sys_write+0xa2 sys/kern/sys_generic.c:300
#8 syscall+0xbd4 mi_syscall sys/sys/syscall_mi.h:176 [inline]
#8 syscall+0xbd4 sys/arch/amd64/amd64/trap.c:783
#9 Xsyscall+0x128
ddb{0}> show malloc
Type InUse MemUse HighUse Limit Requests Type Lim
devbuf 11106 12110K 12473K 166960K 13571 0
pcb 17 19K 22K 166960K 408 0
rtable 252 13K 13K 166960K 826 0
pf 37 18K 82K 166960K 188 0
ifaddr 43 8K 8K 166960K 134 0
ifgroup 55 2K 3K 166960K 230 0
sysctl 4 1K 9K 166960K 12 0
counters 72 37K 39K 166960K 280 0
ioctlops 0 0K 4K 166960K 1727 0
iov 0 0K 28K 166960K 70 0
mount 1 1K 1K 166960K 1 0
log 0 0K 0K 166960K 4 0
vnodes 1350 85K 86K 166960K 2581 0
UFS quota 1 32K 32K 166960K 1 0
UFS mount 5 36K 36K 166960K 5 0
shm 2 1K 9K 166960K 14 0
VM map 2 1K 1K 166960K 2 0
sem 12 0K 0K 166960K 122 0
dirhash 12 2K 2K 166960K 33 0
ACPI 1692 195K 286K 166960K 12470 0
file desc 18 65K 102K 166960K 1387 0
sigio 0 0K 0K 166960K 16 0
proc 73 115K 164K 166960K 807 0
subproc 72 4K 4K 166960K 108 0
NFS srvsock 1 0K 0K 166960K 1 0
NFS daemon 1 16K 16K 166960K 1 0
ip_moptions 0 0K 0K 166960K 269 0
in_multi 90 6K 7K 166960K 189 0
ether_multi 1 0K 0K 166960K 14 0
mrt 3 0K 0K 166960K 33 0
ISOFS mount 1 32K 32K 166960K 1 0
MSDOSFS mount 1 16K 16K 166960K 1 0
ttys 271 1208K 1208K 166960K 271 0
exec 0 0K 1K 166960K 608 0
fusefs mount 1 32K 32K 166960K 1 0
pfkey data 0 0K 0K 166960K 2 0
tdb 3 0K 0K 166960K 3 0
VM swap 8 62K 64K 166960K 10 0
UVM amap 257 178K 195K 166960K 14643 0
UVM aobj 76 21K 21K 166960K 80 0
pinsyscall 48 96K 106K 166960K 2663 0
memdesc 1 4K 4K 166960K 1 0
crypto data 1 1K 1K 166960K 1 0
ip6_options 2 0K 0K 166960K 102 0
NDP 14 0K 2K 166960K 98 0
temp 142 9084K 9159K 166960K 61402 0
kqueue 15 24K 34K 166960K 284 0
SYN cache 2 16K 16K 166960K 2 0
ddb{0}> show all pools
Name Size Requests Fail Releases Pgreq Pgrel Npage Hiwat Minpg Maxpg Idle
plcache 128 26 0 0 1 0 1 1 0 8 0
rtpcb 120 138 0 134 1 0 1 1 0 8 0
rtentry 176 242 0 146 6 0 6 6 0 8 0
unpcb 144 729 0 706 5 4 1 2 0 8 0
syncache 336 6 0 6 3 3 0 1 0 8 0
tcpcb 736 490 0 484 19 13 6 10 0 8 5
arp 136 28 0 12 1 0 1 1 0 8 0
inpcb 328 1716 0 1705 31 23 8 13 0 8 6
ip6q 72 1 0 1 1 1 0 1 0 8 0
ip6af 40 2 0 2 1 1 0 1 0 8 0
nd6 152 40 0 16 2 0 2 2 0 8 1
pkpcb 40 10 0 10 4 3 1 1 0 8 1
kcovpl 48 12 0 4 1 0 1 1 0 8 0
ppxss 1192 85 0 84 2 1 1 1 0 8 0
pppxif 1504 6 0 6 3 3 0 1 0 8 0
pfstscr 40 1 0 1 1 1 0 1 0 8 0
pffrag 232 11 0 6 1 0 1 1 0 482 0
pffrnode 88 11 0 6 1 0 1 1 0 8 0
pffrent 40 19 0 14 1 0 1 1 0 8 0
pfosfp 40 1428 0 1005 5 0 5 5 0 8 0
pfosfpen 112 1428 0 714 21 0 21 21 0 8 0
pfrktable 1344 1 0 1 1 1 0 1 0 8 0
pfsrclim 320 1 0 1 1 1 0 1 0 8 0
pfstitem 24 109 0 55 1 0 1 1 0 8 0
pfstkey 128 112 0 58 2 0 2 2 0 8 0
pfstate 448 110 0 57 8 1 7 7 0 8 0
pfrule 1360 22 0 17 2 1 1 2 0 8 0
rttmr 136 3 0 3 2 2 0 1 0 8 0
art_heap8 4096 3 0 0 3 0 3 3 0 8 0
art_heap4 256 744 0 321 34 7 27 31 0 8 0
art_table 40 747 0 321 5 0 5 5 0 8 0
art_node 32 242 0 157 2 1 1 2 0 8 0
sysvmsgpl 40 61 0 43 1 0 1 1 0 8 0
semupl 112 1 0 1 1 1 0 1 0 8 0
semapl 112 120 0 110 1 0 1 1 0 8 0
shmpl 112 69 0 4 2 0 2 2 0 8 0
dirhash 1024 32 0 15 3 0 3 3 0 8 0
dino2pl 256 4267 0 2796 93 0 93 93 0 8 0
ffsino 296 4267 0 2796 114 0 114 114 0 8 0
nchpl 144 6120 0 4403 64 0 64 64 0 8 0
rtmask 32 24 0 23 3 2 1 1 0 8 0
vnodes 216 4869 0 0 271 0 271 271 0 8 0
namei 1024 21031 0 21031 4 2 2 2 0 8 2
percpumem 16 155 0 104 1 0 1 1 0 8 0
vcpupl 3968 8 0 0 1 0 1 1 0 8 0
vmpool 848 8 0 0 1 0 1 1 0 8 0
kstatmem 264 152 0 124 5 2 3 3 0 8 1
scsiplug 72 2 0 2 1 0 1 1 0 8 1
scxspl 216 38421 0 38421 16 15 1 8 1 8 1
plimitpl 152 514 0 496 1 0 1 1 0 8 0
sigapl 424 1696 0 1645 7 1 6 7 0 8 0
knotepl 120 729 0 0 22 0 22 22 0 8 0
kqueuepl 224 416 0 402 5 3 2 2 0 8 0
pipepl 344 282 0 254 9 6 3 6 0 8 0
fdescpl 528 1677 0 1643 3 0 3 3 0 8 0
filepl 160 10174 0 9943 23 9 14 16 0 8 2
lockfpl 104 642 0 639 2 1 1 2 0 8 0
lockfspl 48 257 0 254 1 0 1 1 0 8 0
sessionpl 144 32 0 22 1 0 1 1 0 8 0
pgrppl 48 106 0 88 1 0 1 1 0 8 0
ucredpl 104 1926 0 1910 1 0 1 1 0 8 0
zombiepl 144 2364 0 2362 1 0 1 1 0 8 0
processpl 1232 1696 0 1645 5 0 5 5 0 8 0
procpl 664 3931 0 3870 8 2 6 7 0 8 0
sosppl 176 11 0 11 4 4 0 1 0 8 0
sockpl 752 2636 0 2598 39 27 12 18 0 8 7
mcl64k 65536 7 0 0 1 0 1 1 0 8 0
mcl16k 16384 3 0 0 1 0 1 1 0 8 0
mcl12k 12288 2 0 0 1 0 1 1 0 8 0
mcl9k 9216 2 0 0 1 0 1 1 0 8 0
mcl8k 8192 8 0 0 1 0 1 1 0 8 0
mcl4k 4096 126 0 0 16 0 16 16 0 8 0
mcl2k 2048 28 0 0 4 0 4 4 0 8 0
mtagpl 96 3 0 0 1 0 1 1 0 8 0
mbufpl 256 1202 0 0 73 0 73 73 0 8 0
bufpl 280 15300 0 9170 439 0 439 439 0 8 0
anonpl 32 14344 0 0 116 0 116 116 0 246 0
amapchunkpl 152 49458 0 48958 45 17 28 35 0 158 2
amappl16 200 5818 0 5773 85 71 14 33 0 8 8
amappl15 192 9 0 9 2 2 0 1 0 8 0
amappl14 184 493 0 491 1 0 1 1 0 8 0
amappl13 176 136 0 121 1 0 1 1 0 8 0
amappl12 168 1957 0 1925 2 0 2 2 0 8 0
amappl11 160 4 0 4 1 1 0 1 0 8 0
amappl10 152 77 0 62 1 0 1 1 0 8 0
amappl9 144 275 0 275 1 1 0 1 0 8 0
amappl8 136 121 0 118 1 0 1 1 0 8 0
amappl7 128 171 0 155 1 0 1 1 0 8 0
amappl6 120 211 0 209 1 0 1 1 0 8 0
amappl5 112 99 0 85 1 0 1 1 0 8 0
amappl4 104 350 0 330 1 0 1 1 0 8 0
amappl3 96 10076 0 9964 4 0 4 4 0 8 0
amappl2 88 606 0 528 2 0 2 2 0 8 0
amappl1 80 16471 0 15670 23 4 19 20 0 8 0
amappl 88 13610 0 13441 5 0 5 5 0 92 0
uvmvnodes 80 155 0 0 4 0 4 4 0 8 0
dma4096 4096 1 0 1 1 1 0 1 0 8 0
dma1024 1024 1 0 0 1 0 1 1 0 8 0
dma512 512 1 0 1 1 1 0 1 0 8 0
dma256 256 6 0 6 1 1 0 1 0 8 0
dma128 128 254 0 254 2 1 1 1 0 8 1
dma64 64 6 0 6 1 1 0 1 0 8 0
dma32 32 7 0 7 1 1 0 1 0 8 0
dma16 16 20 0 19 1 0 1 1 0 8 0
aobjpl 72 79 0 4 2 0 2 2 0 8 0
uaddrrnd 24 1677 0 1643 1 0 1 1 0 8 0
uaddrbest 32 2 0 0 1 0 1 1 0 8 0
uaddr 24 1677 0 1643 1 0 1 1 0 8 0
vmmpekpl 168 15161 0 15106 3 0 3 3 0 8 0
vmmpepl 168 114402 0 112173 149 28 121 125 0 357 10
vmsppl 488 1676 0 1642 6 1 5 5 0 8 0
rwobjpl 80 33367 0 31949 47 8 39 39 0 8 0
pdppl 4096 3377 0 3292 126 41 85 86 0 8 0
pvpl 32 25295 0 0 204 0 204 204 0 265 0
pmappl 256 1684 0 1642 3 0 3 3 0 8 0
extentpl 40 45 0 27 1 0 1 1 0 8 0
phpool 112 398 0 71 10 0 10 10 0 8 0
ddb{0}> machine ddbcpu 0
Invalid cpu 0
ddb{0}> trace
db_enter() at db_enter+0x25 sys/arch/amd64/amd64/db_interface.c:438
panic(ffffffff834489d1) at panic+0x1e5 sys/kern/subr_prf.c:198
__assert(ffffffff8348a893,ffffffff834a26a1,1cb,ffffffff8344193c) at __assert+0x29 sys/kern/subr_prf.c:-1
pipex_unlink_session_locked(ffff80003afe1bf8) at pipex_unlink_session_locked+0x429
pipex_destroy_all_sessions(ffff800001652000) at pipex_destroy_all_sessions+0xd9 pipex_rele_session sys/net/pipex.c:-1 [inline]
pipex_destroy_all_sessions(ffff800001652000) at pipex_destroy_all_sessions+0xd9 sys/net/pipex.c:151
pppacclose(637e,1,2000,ffff8000fffee7e0) at pppacclose+0x16f sys/net/if_pppx.c:1335
spec_close(ffff80003c40f510) at spec_close+0x417 sys/kern/spec_vnops.c:-1
VOP_CLOSE(fffffd8070b82998,1,fffffd80097fd618,ffff8000fffee7e0) at VOP_CLOSE+0x132 sys/kern/vfs_vops.c:156
vn_closefile(fffffd80616802f0,ffff8000fffee7e0) at vn_closefile+0x12b vn_close sys/kern/vfs_vnops.c:292 [inline]
vn_closefile(fffffd80616802f0,ffff8000fffee7e0) at vn_closefile+0x12b sys/kern/vfs_vnops.c:615
fdrop(fffffd80616802f0,ffff8000fffee7e0) at fdrop+0x121 sys/kern/kern_descrip.c:1281
closef(fffffd80616802f0,ffff8000fffee7e0) at closef+0x192 sys/kern/kern_descrip.c:1265
fdfree(ffff8000fffee7e0) at fdfree+0x116 sys/kern/kern_descrip.c:1196
exit1(ffff8000fffee7e0,0,0,1) at exit1+0x576 sys/kern/kern_exit.c:215
sys_exit(ffff8000fffee7e0,ffff80003c40f880,ffff80003c40f7d0) at sys_exit+0x1a sys/kern/kern_exit.c:-1
syscall(ffff80003c40f880) at syscall+0xb17 mi_syscall sys/sys/syscall_mi.h:176 [inline]
syscall(ffff80003c40f880) at syscall+0xb17 sys/arch/amd64/amd64/trap.c:783
Xsyscall() at Xsyscall+0x128
end of kernel
end trace frame: 0x75540f825db0, count: -16
ddb{0}> machine ddbcpu 1
Stopped at x86_ipi_db+0x27: addq $0x8,%rsp
x86_ipi_db(ffff8000299bdff0) at x86_ipi_db+0x27 sys/arch/amd64/amd64/db_interface.c:394
x86_ipi_handler() at x86_ipi_handler+0xd9 sys/arch/amd64/amd64/ipi.c:106
Xresume_lapic_ipi() at Xresume_lapic_ipi+0x27
__mp_lock(ffffffff83966ac0) at __mp_lock+0x192 __mp_lock_spin sys/kern/kern_lock.c:142 [inline]
__mp_lock(ffffffff83966ac0) at __mp_lock+0x192 sys/kern/kern_lock.c:173
exit1(ffff800036fd0550,0,0,1) at exit1+0x701 sys/kern/kern_exit.c:260
sys_exit(ffff800036fd0550,ffff80003c3e5060,ffff80003c3e4fb0) at sys_exit+0x1a sys/kern/kern_exit.c:-1
syscall(ffff80003c3e5060) at syscall+0xb17 mi_syscall sys/sys/syscall_mi.h:176 [inline]
syscall(ffff80003c3e5060) at syscall+0xb17 sys/arch/amd64/amd64/trap.c:783
Xsyscall() at Xsyscall+0x128
end of kernel
end trace frame: 0x7e0efa099190, count: 7
ddb{1}> trace
x86_ipi_db(ffff8000299bdff0) at x86_ipi_db+0x27 sys/arch/amd64/amd64/db_interface.c:394
x86_ipi_handler() at x86_ipi_handler+0xd9 sys/arch/amd64/amd64/ipi.c:106
Xresume_lapic_ipi() at Xresume_lapic_ipi+0x27
__mp_lock(ffffffff83966ac0) at __mp_lock+0x192 __mp_lock_spin sys/kern/kern_lock.c:142 [inline]
__mp_lock(ffffffff83966ac0) at __mp_lock+0x192 sys/kern/kern_lock.c:173
exit1(ffff800036fd0550,0,0,1) at exit1+0x701 sys/kern/kern_exit.c:260
sys_exit(ffff800036fd0550,ffff80003c3e5060,ffff80003c3e4fb0) at sys_exit+0x1a sys/kern/kern_exit.c:-1
syscall(ffff80003c3e5060) at syscall+0xb17 mi_syscall sys/sys/syscall_mi.h:176 [inline]
syscall(ffff80003c3e5060) at syscall+0xb17 sys/arch/amd64/amd64/trap.c:783
Xsyscall() at Xsyscall+0x128
end of kernel
end trace frame: 0x7e0efa099190, count: -8
---
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