UBSan: Undefined Behavior in VOP_ISLOCKED

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syzbot

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Sep 29, 2023, 7:59:48 PM9/29/23
to syzkaller-...@googlegroups.com
Hello,

syzbot found the following issue on:

HEAD commit: 23ee83f7c0ae c.7: mention that C11 and C17 have been publi..
git tree: netbsd
console output: https://syzkaller.appspot.com/x/log.txt?x=15172ce6680000
kernel config: https://syzkaller.appspot.com/x/.config?x=1420f906d33d9f1f
dashboard link: https://syzkaller.appspot.com/bug?extid=e77d5aa02a1597224aeb
compiler: g++ (Debian 12.2.0-14) 12.2.0

Unfortunately, I don't have any reproducer for this issue yet.

Downloadable assets:
disk image: https://storage.googleapis.com/syzbot-assets/eec3acfd0e7f/disk-23ee83f7.raw.xz
netbsd.gdb: https://storage.googleapis.com/syzbot-assets/155e6a968a41/netbsd-23ee83f7.gdb.xz

IMPORTANT: if you fix the issue, please add the following tag to the commit:
Reported-by: syzbot+e77d5a...@syzkaller.appspotmail.com

[ 125.7964133] panic: UBSan: Undefined Behavior in /syzkaller/managers/ci2-netbsd-kubsan/kernel/sys/kern/vnode_if.c:66:15, member access within misaligned address 0x500000004 for type 'struct vnode_t' which requires 64 byte alignment

[ 125.8164083] cpu1: Begin traceback...
[ 125.8464073] vpanic() at netbsd:vpanic+0x2f0 sys/kern/subr_prf.c:292
[ 125.9164088] Report() at netbsd:Report+0x3b sys/../common/lib/libc/misc/ubsan.c:1352
[ 125.9764088] HandleTypeMismatch() at netbsd:HandleTypeMismatch+0xfc sys/../common/lib/libc/misc/ubsan.c:432
[ 126.0264093] VOP_ISLOCKED() at netbsd:VOP_ISLOCKED+0x244 vop_pre sys/kern/vnode_if.c:66 [inline]
[ 126.0264093] VOP_ISLOCKED() at netbsd:VOP_ISLOCKED+0x244 sys/kern/vnode_if.c:1790
[ 126.0764079] union_check_rmdir() at netbsd:union_check_rmdir+0x73 sys/fs/union/union_subr.c:1128
[ 126.1264086] union_rmdir() at netbsd:union_rmdir+0x143 sys/fs/union/union_vnops.c:1471
[ 126.1764084] VOP_RMDIR() at netbsd:VOP_RMDIR+0x204 sys/kern/vnode_if.c:1382
[ 126.2264080] union_rmdir() at netbsd:union_rmdir+0x258 sys/fs/union/union_vnops.c:1485
[ 126.2764084] VOP_RMDIR() at netbsd:VOP_RMDIR+0x204 sys/kern/vnode_if.c:1382
[ 126.3264101] do_sys_unlinkat() at netbsd:do_sys_unlinkat+0x40c sys/kern/vfs_syscalls.c:2890
[ 126.3864085] syscall() at netbsd:syscall+0x2da sy_call sys/sys/syscallvar.h:65 [inline]
[ 126.3864085] syscall() at netbsd:syscall+0x2da sy_invoke sys/sys/syscallvar.h:94 [inline]
[ 126.3864085] syscall() at netbsd:syscall+0x2da sys/arch/x86/x86/syscall.c:138
[ 126.3964085] --- syscall (number 137) ---
[ 126.4164090] netbsd:syscall+0x2da:
[ 126.4164090] cpu1: End traceback...
[ 126.4264109] fatal breakpoint trap in supervisor mode
[ 126.4264109] trap type 1 code 0 rip 0xffffffff80235485 cs 0x8 rflags 0x246 cr2 0x77c398542000 ilevel 0 rsp 0xffff8d824833c610
[ 126.4364139] curlwp 0xffff8a41eef216c0 pid 3178.3178 lowest kstack 0xffff8d82483382c0
Stopped in pid 3178.3178 (syz-executor.1) at netbsd:breakpoint+0x5: leave
?
breakpoint() at netbsd:breakpoint+0x5
db_panic() at netbsd:db_panic+0xec sys/ddb/db_panic.c:69
vpanic() at netbsd:vpanic+0x2f0 sys/kern/subr_prf.c:292
Report() at netbsd:Report+0x3b sys/../common/lib/libc/misc/ubsan.c:1352
HandleTypeMismatch() at netbsd:HandleTypeMismatch+0xfc sys/../common/lib/libc/misc/ubsan.c:432
VOP_ISLOCKED() at netbsd:VOP_ISLOCKED+0x244 vop_pre sys/kern/vnode_if.c:66 [inline]
VOP_ISLOCKED() at netbsd:VOP_ISLOCKED+0x244 sys/kern/vnode_if.c:1790
union_check_rmdir() at netbsd:union_check_rmdir+0x73 sys/fs/union/union_subr.c:1128
union_rmdir() at netbsd:union_rmdir+0x143 sys/fs/union/union_vnops.c:1471
VOP_RMDIR() at netbsd:VOP_RMDIR+0x204 sys/kern/vnode_if.c:1382
union_rmdir() at netbsd:union_rmdir+0x258 sys/fs/union/union_vnops.c:1485
VOP_RMDIR() at netbsd:VOP_RMDIR+0x204 sys/kern/vnode_if.c:1382
do_sys_unlinkat() at netbsd:do_sys_unlinkat+0x40c sys/kern/vfs_syscalls.c:2890
syscall() at netbsd:syscall+0x2da sy_call sys/sys/syscallvar.h:65 [inline]
syscall() at netbsd:syscall+0x2da sy_invoke sys/sys/syscallvar.h:94 [inline]
syscall() at netbsd:syscall+0x2da sys/arch/x86/x86/syscall.c:138
--- syscall (number 137) ---
netbsd:syscall+0x2da:
Panic string: UBSan: Undefined Behavior in /syzkaller/managers/ci2-netbsd-kubsan/kernel/sys/kern/vnode_if.c:66:15, member access within misaligned address 0x500000004 for type 'struct vnode_t' which requires 64 byte alignment

PID LID S CPU FLAGS STRUCT LWP * NAME WAIT
1775 1775 2 0 0 ffff8a41efac45c0 syz-executor.5
3178 >3178 7 1 40140 ffff8a41eef216c0 syz-executor.1
1784 1784 3 0 1c0 ffff8a41f24c1b40 syz-executor.0 pipe_rd
1857 1857 2 0 40 ffff8a41f4db6300 syz-executor.5
1676 1676 3 1 180 ffff8a41ee941740 syz-executor.1 parked
1899 1899 3 0 180 ffff8a41f243f680 syz-executor.1 parked
3176 3176 3 0 180 ffff8a41e83c6200 syz-executor.1 parked
1433 1433 3 0 180 ffff8a41e88f2540 syz-executor.3 parked
3003 3003 3 1 180 ffff8a41f30b4b00 syz-executor.2 parked
1267 1267 3 1 180 ffff8a41e2da3180 syz-executor.2 parked
2897 2897 3 1 180 ffff8a41eefac580 syz-executor.3 parked
1262 1262 3 0 180 ffff8a41e11d3280 syz-executor.2 parked
1215 1215 3 1 180 ffff8a41ec1d9200 syz-executor.2 parked
2137 2137 3 1 180 ffff8a41eff48480 syz-executor.2 parked
1582 1582 3 1 180 ffff8a41e83c6640 syz-executor.2 parked
1629 1629 3 1 180 ffff8a41ef5da500 syz-executor.2 parked
2120 2120 3 0 180 ffff8a41f30b4280 syz-executor.2 parked
2091 2091 3 0 180 ffff8a41ee941300 syz-executor.4 parked
3023 3023 3 1 180 ffff8a41f3579600 syz-executor.4 parked
1008 1008 3 1 1c0 ffff8a41f30b46c0 syz-executor.4 pipe_rd
1749 1749 3 0 180 ffff8a41edf8a680 syz-executor.2 parked
578 578 3 1 180 ffff8a41ef5da0c0 syz-executor.2 parked
932 932 3 1 180 ffff8a41ee806b40 syz-executor.5 parked
2107 2107 3 0 180 ffff8a41edf8a240 syz-executor.1 parked
2233 2233 3 0 180 ffff8a41edf8aac0 syz-executor.1 parked
2229 2229 3 0 180 ffff8a41e229a940 syz-executor.1 parked
1970 1970 3 1 180 ffff8a41ee363340 syz-executor.1 parked
1969 1969 3 0 180 ffff8a41ee43d900 syz-executor.3 parked
411 411 3 0 180 ffff8a41ee8062c0 syz-executor.1 parked
1324 1324 3 0 180 ffff8a41ee363bc0 syz-executor.3 parked
295 295 3 0 180 ffff8a41ee363780 syz-executor.5 parked
293 293 3 0 180 ffff8a41ee941b80 syz-executor.5 parked
410 410 3 1 180 ffff8a41eff48040 syz-executor.1 parked
390 390 3 0 180 ffff8a41ef5da940 syz-executor.1 parked
813 813 3 0 1c0 ffff8a41e229a500 syz-executor.2 pipe_rd
1230 1212 2 1 100 ffff8a41ec1d9640 syz-fuzzer
1230 1247 3 1 180 ffff8a41e21c24c0 syz-fuzzer wait
1230 1245 3 1 180 ffff8a41e18ec8c0 syz-fuzzer parked
1230 990 3 0 180 ffff8a41e12a7300 syz-fuzzer parked
1230 829 3 0 180 ffff8a41e21c2900 syz-fuzzer wait
1230 1120 3 0 180 ffff8a41e11d3b00 syz-fuzzer wait
1230 929 3 1 180 ffff8a41e11d36c0 syz-fuzzer wait
1230 979 3 0 180 ffff8a41e2f2a580 syz-fuzzer parked
1230 1225 3 1 180 ffff8a41e182a100 syz-fuzzer wait
1230 1224 3 1 180 ffff8a41e182a980 syz-fuzzer parked
1230 1226 3 1 180 ffff8a41e182a540 syz-fuzzer parked
1230 1080 2 1 100 ffff8a41e2f2a140 syz-fuzzer
1230 1230 2 0 140 ffff8a41e2f2a9c0 syz-fuzzer
1229 1229 3 0 180 ffff8a41e2da35c0 sshd select
1184 1184 3 0 180 ffff8a41e3640a40 getty nanoslp
1195 1195 3 0 180 ffff8a41e2da3a00 getty nanoslp
1223 1223 3 0 180 ffff8a41e0e7f200 getty nanoslp
1196 1196 3 0 1c0 ffff8a41e0e7cac0 getty ttyraw
1109 1109 3 0 180 ffff8a41e1226700 sshd select
1094 1094 3 0 180 ffff8a41e36401c0 powerd kqueue
702 702 3 1 180 ffff8a41e12a7b80 syslogd kqueue
747 747 3 0 180 ffff8a41e18ec480 dhcpcd poll
742 742 3 0 180 ffff8a41e12a7740 dhcpcd poll
466 466 3 1 180 ffff8a41e171f340 dhcpcd poll
598 598 3 0 180 ffff8a41e18ec040 dhcpcd poll
292 292 3 0 180 ffff8a41e171fbc0 dhcpcd poll
485 485 3 0 180 ffff8a41e171f780 dhcpcd poll
291 291 3 1 180 ffff8a41e12262c0 dhcpcd poll
1 1 3 0 180 ffff8a41d8c8f140 init wait
0 2908 3 0 200 ffff8a41f243fac0 ktrace ktrwait
0 1995 3 0 200 ffff8a41e3640600 ktrace ktrwait
0 1362 3 0 200 ffff8a41efac4a00 ktrace ktrwait
0 388 3 0 200 ffff8a41e21c2080 ktrace ktrwait
0 1971 3 1 200 ffff8a41ee43d080 ktrace ktrwait
0 686 3 0 200 ffff8a41e0e7f640 physiod physiod
0 196 3 1 200 ffff8a41e0e7c680 pooldrain pooldrain
0 > 195 7 0 240 ffff8a41e0e7c240 ioflush
0 194 3 0 200 ffff8a41e0e7fa80 pgdaemon pgdaemon
0 170 3 0 200 ffff8a41dedaea40 usb7 usbevt
0 169 3 0 200 ffff8a41dedae600 usb6 usbevt
0 168 3 1 200 ffff8a41dedae1c0 usb5 usbevt
0 167 3 0 200 ffff8a41dbd71a00 usb4 usbevt
0 166 3 0 200 ffff8a41dbd715c0 usb3 usbevt
0 165 3 0 200 ffff8a41dbd71180 usb2 usbevt
0 31 3 0 200 ffff8a41d8c8f9c0 usb1 usbevt
0 63 3 1 200 ffff8a41d8aff740 usb0 usbevt
0 126 3 1 200 ffff8a41d8affb80 usbtask-dr usbtsk
0 125 3 1 200 ffff8a41d8bde340 usbtask-hc usbtsk
0 124 3 0 200 ffff8a41d7095b00 swwreboot swwreboot
0 123 3 0 200 ffff8a41d8c8f580 npfgc0 npfgcw
0 122 3 1 200 ffff8a41d8c62980 rt_free rt_free
0 121 3 1 200 ffff8a41d8c62540 unpgc unpgc
0 120 3 0 200 ffff8a41d8c62100 key_timehandler key_timehandler
0 119 3 1 200 ffff8a41d8c4d940 icmp6_wqinput/1 icmp6_wqinput
0 118 3 0 200 ffff8a41d8c4d500 icmp6_wqinput/0 icmp6_wqinput
0 117 3 1 200 ffff8a41d8c4d0c0 nd6_timer nd6_timer
0 116 3 1 200 ffff8a41d8c50900 carp6_wqinput/1 carp6_wqinput
0 115 3 0 200 ffff8a41d8c504c0 carp6_wqinput/0 carp6_wqinput
0 114 3 1 200 ffff8a41d8c50080 carp_wqinput/1 carp_wqinput
0 113 3 0 200 ffff8a41d8c138c0 carp_wqinput/0 carp_wqinput
0 112 3 1 200 ffff8a41d8c13480 icmp_wqinput/1 icmp_wqinput
0 111 3 0 200 ffff8a41d8c13040 icmp_wqinput/0 icmp_wqinput
0 110 3 1 200 ffff8a41d8bdebc0 rt_timer rt_timer
0 109 3 0 200 ffff8a41d8bde780 vmem_rehash vmem_rehash
0 100 3 0 200 ffff8a41d8aff300 entbutler entropy
0 99 3 0 200 ffff8a41d8536b40 viomb balloon
0 98 3 1 200 ffff8a41d8536700 vioif0_txrx/1 vioif0_txrx
0 97 3 0 200 ffff8a41d85362c0 vioif0_txrx/0 vioif0_txrx
0 30 3 1 200 ffff8a41d70956c0 scsibus0 sccomp
0 29 3 0 200 ffff8a41d7095280 pms0 pmsreset
0 28 3 1 200 ffff8a41d6fb5ac0 xcall/1 xcall
0 27 1 1 200 ffff8a41d6fb5680 softser/1
0 26 1 1 200 ffff8a41d6fb5240 softclk/1
0 25 1 1 200 ffff8a41d6f98a80 softbio/1
0 24 1 1 200 ffff8a41d6f98640 softnet/1
0 23 1 1 201 ffff8a41d6f98200 idle/1
0 22 3 1 200 ffff8a4305329a40 lnxsyswq lnxsyswq
0 21 3 1 200 ffff8a4305329600 lnxubdwq lnxubdwq
0 20 3 1 200 ffff8a43053291c0 lnxpwrwq lnxpwrwq
0 19 3 1 200 ffff8a4305338a00 lnxlngwq lnxlngwq
0 18 3 1 200 ffff8a43053385c0 lnxhipwq lnxhipwq
0 17 3 1 200 ffff8a4305338180 lnxrcugc lnxrcugc
0 16 3 0 200 ffff8a430534f9c0 sysmon smtaskq
0 15 3 1 200 ffff8a430534f580 pmfsuspend pmfsuspend
0 14 3 0 200 ffff8a430534f140 pmfevent pmfevent
0 13 3 1 200 ffff8a4305360980 sopendfree sopendfr
0 12 3 0 200 ffff8a4305360540 ifwdog ifwdog
0 11 3 0 200 ffff8a4305360100 iflnkst iflnkst
0 10 3 1 200 ffff8a4306391940 nfssilly nfssilly
0 9 3 0 200 ffff8a4306391500 vdrain vdrain
0 8 3 1 200 ffff8a43063910c0 modunload mod_unld
0 7 3 0 200 ffff8a43063b8900 xcall/0 xcall
0 6 1 0 200 ffff8a43063b84c0 softser/0
0 5 1 0 200 ffff8a43063b8080 softclk/0
0 4 1 0 200 ffff8a43063e98c0 softbio/0
0 3 1 0 200 ffff8a43063e9480 softnet/0
0 2 1 0 201 ffff8a43063e9040 idle/0
0 0 3 0 200 ffffffff86766540 swapper uvm
[Locks tracked through LWPs]

****** LWP 3178.3178 (syz-executor.1) @ 0xffff8a41eef216c0, l_stat=7

*** Locks held:

* Lock 0 (initialized at netbsd:vcache_alloc+0xba sys/kern/vfs_vnode.c:1376)
lock address : ffff8a41e9136700
type : sleep/adaptive
initialized : netbsd:vcache_alloc+0xba
shared holds : 0 exclusive: 1
shares wanted: 0 exclusive: 0
relevant cpu : 1 last held: 1
relevant lwp : 0xffff8a41eef216c0 last held: 0xffff8a41eef216c0
last locked* : netbsd:genfs_lock+0x220
unlocked : netbsd:genfs_unlock+0x50
owner/count : 0xffff8a41eef216c0 flags : 0x0000000000000004
Turnstile: no active turnstile for this lock.

* Lock 1 (initialized at netbsd:vcache_alloc+0xba sys/kern/vfs_vnode.c:1376)
lock address : ffff8a41e9136c00
type : sleep/adaptive
initialized : netbsd:vcache_alloc+0xba
shared holds : 0 exclusive: 1
shares wanted: 0 exclusive: 0
relevant cpu : 1 last held: 1
relevant lwp : 0xffff8a41eef216c0 last held: 0xffff8a41eef216c0
last locked* : netbsd:genfs_lock+0x220
unlocked : netbsd:genfs_unlock+0x50
owner/count : 0xffff8a41eef216c0 flags : 0x0000000000000004
Turnstile: no active turnstile for this lock.

*** Locks wanted: none

****** LWP 1230.1230 (syz-fuzzer) @ 0xffff8a41e2f2a9c0, l_stat=2

*** Locks held:

* Lock 0 (initialized at netbsd:amap_alloc1+0x30a sys/uvm/uvm_amap.c:167)
lock address : ffff8a41e181aa00
type : sleep/adaptive
initialized : netbsd:amap_alloc1+0x30a
shared holds : 0 exclusive: 1
shares wanted: 0 exclusive: 0
relevant cpu : 0 last held: 0
relevant lwp : 0xffff8a41e2f2a9c0 last held: 0xffff8a41e2f2a9c0
last locked* : netbsd:uvm_fault_internal+0x75d
unlocked : netbsd:uvm_fault_upper_enter+0x454
owner/count : 000000000000000000 flags : 000000000000000000
Turnstile: no active turnstile for this lock.

* Lock 1 (initialized at netbsd:pmap_ctor+0x6d sys/arch/x86/x86/pmap.c:2872)
lock address : ffff8a41e1655380
type : sleep/adaptive
initialized : netbsd:pmap_ctor+0x6d
shared holds : 0 exclusive: 1
shares wanted: 0 exclusive: 0
relevant cpu : 0 last held: 0
relevant lwp : 0xffff8a41e2f2a9c0 last held: 0xffff8a41e2f2a9c0
last locked* : netbsd:pmap_enter_ma+0x3c0
unlocked : netbsd:pmap_extract+0x2c8
owner field : 000000000000000000 wait/spin: 0/0
Turnstile: no active turnstile for this lock.

*** Locks wanted: none

****** LWP 742.742 (dhcpcd) @ 0xffff8a41e12a7740, l_stat=3

*** Locks held: none

*** Locks wanted:

* Lock 0 (initialized at netbsd:module_hook_init+0x1c sys/kern/kern_module_hook.c:132)
lock address : netbsd:module_hook
type : sleep/adaptive
initialized : netbsd:module_hook_init+0x1c
shared holds : 0 exclusive: 0
shares wanted: 0 exclusive: 0
relevant cpu : 0 last held: 0
relevant lwp : 0xffff8a41e12a7740 last held: 000000000000000000
last locked : 0
unlocked* : 0
owner field : 000000000000000000 wait/spin: 0/0
Turnstile: no active turnstile for this lock.

****** LWP 466.466 (dhcpcd) @ 0xffff8a41e171f340, l_stat=3

*** Locks held: none

*** Locks wanted:

* Lock 0 (initialized at netbsd:module_hook_init+0x1c sys/kern/kern_module_hook.c:132)
lock address : netbsd:module_hook
type : sleep/adaptive
initialized : netbsd:module_hook_init+0x1c
shared holds : 0 exclusive: 0
shares wanted: 0 exclusive: 0
relevant cpu : 1 last held: 0
relevant lwp : 0xffff8a41e171f340 last held: 000000000000000000
last locked : 0
unlocked* : 0
owner field : 000000000000000000 wait/spin: 0/0
Turnstile: no active turnstile for this lock.

****** LWP 485.485 (dhcpcd) @ 0xffff8a41e171f780, l_stat=3

*** Locks held: none

*** Locks wanted:

* Lock 0 (initialized at netbsd:module_hook_init+0x1c sys/kern/kern_module_hook.c:132)
lock address : netbsd:module_hook
type : sleep/adaptive
initialized : netbsd:module_hook_init+0x1c
shared holds : 0 exclusive: 0
shares wanted: 0 exclusive: 0
relevant cpu : 0 last held: 0
relevant lwp : 0xffff8a41e171f780 last held: 000000000000000000
last locked : 0
unlocked* : 0
owner field : 000000000000000000 wait/spin: 0/0
Turnstile: no active turnstile for this lock.

****** LWP 291.291 (dhcpcd) @ 0xffff8a41e12262c0, l_stat=3

*** Locks held: none

*** Locks wanted:

* Lock 0 (initialized at netbsd:module_hook_init+0x1c sys/kern/kern_module_hook.c:132)
lock address : netbsd:module_hook
type : sleep/adaptive
initialized : netbsd:module_hook_init+0x1c
shared holds : 0 exclusive: 0
shares wanted: 0 exclusive: 0
relevant cpu : 1 last held: 0
relevant lwp : 0xffff8a41e12262c0 last held: 000000000000000000
last locked : 0
unlocked* : 0
owner field : 000000000000000000 wait/spin: 0/0
Turnstile: no active turnstile for this lock.

****** LWP 0.26 (softclk/1) @ 0xffff8a41d6fb5240, l_stat=1

*** Locks held: none

*** Locks wanted:

* Lock 0 (initialized at netbsd:module_hook_init+0x1c sys/kern/kern_module_hook.c:132)
lock address : netbsd:module_hook
type : sleep/adaptive
initialized : netbsd:module_hook_init+0x1c
shared holds : 0 exclusive: 0
shares wanted: 0 exclusive: 0
relevant cpu : 1 last held: 0
relevant lwp : 0xffff8a41d6fb5240 last held: 000000000000000000
last locked : 0
unlocked* : 0
owner field : 000000000000000000 wait/spin: 0/0
Turnstile: no active turnstile for this lock.

****** LWP 0.11 (iflnkst) @ 0xffff8a4305360100, l_stat=3

*** Locks held: none

*** Locks wanted:

* Lock 0 (initialized at netbsd:module_hook_init+0x1c sys/kern/kern_module_hook.c:132)
lock address : netbsd:module_hook
type : sleep/adaptive
initialized : netbsd:module_hook_init+0x1c
shared holds : 0 exclusive: 0
shares wanted: 0 exclusive: 0
relevant cpu : 0 last held: 0
relevant lwp : 0xffff8a4305360100 last held: 000000000000000000
last locked : 0
unlocked* : 0
owner field : 000000000000000000 wait/spin: 0/0
Turnstile: no active turnstile for this lock.

****** LWP 0.0 (swapper) @ 0xffffffff86766540, l_stat=3

*** Locks held: none

*** Locks wanted:

* Lock 0 (initialized at netbsd:module_hook_init+0x1c sys/kern/kern_module_hook.c:132)
lock address : netbsd:module_hook
type : sleep/adaptive
initialized : netbsd:module_hook_init+0x1c
shared holds : 0 exclusive: 0
shares wanted: 0 exclusive: 0
relevant cpu : 0 last held: 0
relevant lwp : 0xffffffff86766540 last held: 000000000000000000
last locked : 0
unlocked* : 0
owner field : 000000000000000000 wait/spin: 0/0
Turnstile: no active turnstile for this lock.

[Locks tracked through CPUs]

******* Locks held on cpu1:

* Lock 0 (initialized at netbsd:kprintf_init+0x72 sys/kern/subr_prf.c:156)
lock address : netbsd:kprintf_mtx
type : spin
initialized : netbsd:kprintf_init+0x72
shared holds : 0 exclusive: 1
shares wanted: 0 exclusive: 0
relevant cpu : 1 last held: 1
relevant lwp : 0xffff8a41eef216c0 last held: 0xffff8a41eef216c0
last locked* : netbsd:kprintf_lock+0x50
unlocked : netbsd:kprintf_unlock+0x70
owner field : 0x0000000000000800 wait/spin: 0/1

PAGE FLAG PQ UOBJECT UANON
0xffff8d8000007180 0045 00000000 0x0 0x0
0xffff8d8000007200 0045 00000000 0x0 0x0
0xffff8d8000007280 0045 00000000 0x0 0x0
0xffff8d8000007300 0045 00000000 0x0 0x0
0xffff8d8000007380 0045 00000000 0x0 0x0
0xffff8d8000007400 0045 00000000 0x0 0x0
0xffff8d8000007480 0045 00000000 0x0 0x0
0xffff8d8000007500 0045 00000000 0x0 0x0
0xffff8d8000007580 0045 00000000 0x0 0x0
0xffff8d8000007600 0045 00000000 0x0 0x0
0xffff8d8000007680 0045 00000000 0x0 0x0
0xffff8d8000007700 0041 00000000 0x0 0x0
0xffff8d8000007780 0041 00000000 0x0 0x0
0xffff8d8000007800 0041 00000000 0x0 0x0
0xffff8d8000007880 0041 00000000 0x0 0x0
0xffff8d8000007900 0045 00000000 0x0 0x0
0xffff8d8000007980 0041 00000000 0x0 0x0
0xffff8d8000007a00 0041 00000000 0x0 0x0
0xffff8d8000007a80 0041 00000000 0x0 0x0
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0xffff8d8000014f00 0041 00000000 0x0 0x0
0xffff8d8000014f80 0041 00000000 0x0 0x0
0xffff8d8000015000 0041 00000000 0x0 0x0
0xffff8d8000015080 0041 00000000 0x0 0x0
0xffff8d8000015100 0041 00000000 0x0 0x0
0xffff8d8000015180 0041 00000000 0x0 0x0
0xffff8d8000015200 0041 00000000 0x0 0x0
0xffff8d8000015280 0041 00000000 0x0 0x0
0xffff8d8000015300 0041 00000000 0x0 0x0
0xffff8d8000015380 0041 00000000 0x0 0x0
0xffff8d8000015400 0041 00000000 0x0 0x0
0xffff8d8000015480 0041 00000000 0x0 0x0
0xffff8d8000015500 0041 00000000 0x0 0x0
0xffff8d8000015580 0041 00000000 0x0 0x0
0xffff8d8000015600 0041 00000000 0x0 0x0
0xffff8d8000015680 0041 00000000 0x0 0x0
0xffff8d8000015700 0041 00000000 0x0 0x0
0xffff8d8000015780 0041 00000000 0x0 0x0
0xffff8d8000015800 0041 00000000 0x0 0x0
0xffff8d8000015880 0041 00000000 0x0 0x0
0xffff8d8000015900 0041 00000000 0x0 0x0
0xffff8d8000015980 0041 00000000 0x0 0x0
0xffff8d8000015a00 0001 00000000 0x0 0x0
0xffff8d8000015a80 0001 00000000 0x0 0x0
0xffff8d8000015b00 0001 00000000 0x0 0x0
0xffff8d8000015b80 0001 00000000 0x0 0x0
0xffff8d8000015c00 0001 00000000 0x0 0x0
0xffff8d8000015c80 0001 00000000 0x0 0x0
0xffff8d8000015d00 0001 00000000 0x0 0x0
0xffff8d8000015d80 0001 00000000 0x0 0x0
0xffff8d8000015e00 0001 00000000 0x0 0x0
0xffff8d8000015e80 0001 00000000 0x0 0x0
0xffff8d8000015f00 0001 00000000 0x0 0x0
0xffff8d8000015f80 0001 00000000 0x0 0x0
0xffff8d8000016000 0001 00000000 0x0 0x0
0xffff8d8000016080 0001 00000000 0x0 0x0
0xffff8d8000016100 0001 00000000 0x0 0x0
0xffff8d8000016180 0001 00000000 0x0 0x0
0xffff8d8000016200 0001 00000000 0x0 0x0
0xffff8d8000016280 0001 00000000 0x0 0x0
0xffff8d8000016300 0001 00000000 0x0 0x0
0xffff8d8000016380 0001 00000000 0x0 0x0
0xffff8d8000016400 0001 00000000 0x0 0x0
0xffff8d8000016480 0001 00000000 0x0 0x0
0xffff8d8000016500 0001 00000000 0x0 0x0
0xffff8d8000016580 0001 00000000 0x0 0x0
0xffff8d8000016600 0001 00000000 0x0 0x0
0xffff8d8000016680 0001 00000000 0x0 0x0
0xffff8d8000016700 0001 00000000 0x0 0x0
0xffff8d8000016780 0001 00000000 0x0 0x0
0xffff8d8000016800 0001 00000000 0x0 0x0
0xffff8d8000016880 0001 00000000 0x0 0x0
0xffff8d8000016900 0001 00000000 0x0 0x0
0xffff8d8000016980 0001 00000000 0x0 0x0
0xffff8d8000016a00 0001 00000000 0x0 0x0
0xffff8d8000016a80 0001 00000000 0x0 0x0
0xffff8d8000016b00 0001 00000000 0x0 0x0
0xffff8d8000016b80 0001 00000000 0x0 0x0
0xffff8d8000016c00 0001 00000000 0x0 0x0
0xffff8d8000016c80 0001 00000000 0x0 0x0
0xffff8d8000016d00 0001 00000000 0x0 0x0
0xffff8d8000016d80 0001 00000000 0x0 0x0
0xffff8d8000016e00 0001 00000000 0x0 0x0
0xffff8d8000016e80 0001 00000000 0x0 0x0
0xffff8d8000016f00 0001 00000000 0x0 0x0
0xffff8d8000016f80 0001 00000000 0x0 0x0
0xffff8d8000017000 0001 00000000 0x0 0x0
0xffff8d8000017080 0001 00000000 0x0 0x0
0xffff8d8000017100 0001 00000000 0x0 0x0
0xffff8d8000017180 0001 00000000 0x0 0x0
0xffff8d8000017200 0001 00000000 0x0 0x0
0xffff8d8000017280 0001 00000000 0x0 0x0
0xffff8d8000017300 0001 00000000 0x0 0x0
0xffff8d8000017380 0001 00000000 0x0 0x0
0xffff8d8000017400 0001 00000000 0x0 0x0
0xffff8d8000017480 0001 00000000 0x0 0x0
0xffff8d8000017500 0041 00000000 0x0 0x0
0xffff8d8000017580 0041 00000000 0x0 0x0
0xffff8d8000017600 0041 00000000 0x0 0x0
0xffff8d8000017680 0041 00000000 0x0 0x0
0xffff8d8000017700 0041 00000000 0x0 0x0
0xffff8d8000017780 0041 00000000 0x0 0x0
0xffff8d8000017800 0041 00000000 0x0 0x0
0xffff8d8000017880 0041 00000000 0x0 0x0
0xffff8d8000017900 0041 00000000 0x0 0x0
0xffff8d8000017980 0041 00000000 0x0 0x0
0xffff8d8000017a00 0041 00000000 0x0 0x0
0xffff8d8000017a80 0041 00000000 0x0 0x0
0xffff8d8000017b00 0041 00000000 0x0 0x0
0xffff8d8000017b80 0041 00000000 0x0 0x0
0xffff8d8000017c00 0041 00000000 0x0 0x0
0xffff8d8000017c80 0041 00000000 0x0 0x0
0xffff8d8000017d00 0041 00000000 0x0 0x0
0xffff8d8000017d80 0041 00000000 0x0 0x0
0xffff8d8000017e00 0041 00000000 0x0 0x0
0xffff8d8000017e80 0041 00000000 0x0 0x0
0xffff8d8000017f00 0041 00000000 0x0 0x0
0xffff8d8000017f80 0041 00000000 0x0 0x0
0xffff8d8000018000 0041 00000000 0x0 0x0
0xffff8d8000018080 0041 00000000 0x0 0x0
0xffff8d8000018100 0041 00000000 0x0 0x0
0xffff8d8000018180 0041 00000000 0x0 0x0
0xffff8d8000018200 0041 00000000 0x0 0x0
0xffff8d8000018280 0041 00000000 0x0 0x0
0xffff8d8000018300 0041 00000000 0x0 0x0
0xffff8d8000018380 0041 00000000 0x0 0x0
0xffff8d8000018400 0041 00000000 0x0 0x0
0xffff8d8000018480 0041 00000000 0x0 0x0
0xffff8d8000018500 0041 00000000 0x0 0x0
0xffff8d8000018580 0041 00000000 0x0 0x0
0xffff8d8000018600 0041 00000000 0x0 0x0
0xffff8d8000018680 0041 00000000 0x0 0x0
0xffff8d8000018700 0041 00000000 0x0 0x0
0xffff8d8000018780 0041 00000000 0x0 0x0
0xffff8d8000018800 0041 00000000 0x0 0x0
0xffff8d8000018880 0041 00000000 0x0 0x0
0xffff8d8000018900 0041 00000000 0x0 0x0
0xffff8d8000018980 0041 00000000 0x0 0x0
0xffff8d8000018a00 0041 00000000 0x0 0x0
0xffff8d8000018a80 0041 00000000 0x0 0x0
0xffff8d8000018b00 0001 00000000 0x0 0x0
0xffff8d8000018b80 0001 00000000 0x0 0x0
0xffff8d8000018c00 0001 00000000 0x0 0x0
0xffff8d8000018c80 0001 00000000 0x0 0x0
0xffff8d8000018d00 0001 00000000 0x0 0x0
0xffff8d8000018d80 0001 00000000 0x0 0x0
0xffff8d8000018e00 0001 00000000 0x0 0x0
0xffff8d8000018e80 0001 00000000 0x0 0x0
0xffff8d8000018f00 0001 00000000 0x0 0x0
0xffff8d8000018f80 0001 00000000 0x0 0x0
0xffff8d8000019000 0001 00000000 0x0 0x0
0xffff8d8000019080 0001 00000000 0x0 0x0
0xffff8d8000019100 0001 00000000 0x0 0x0
0xffff8d8000019180 0001 00000000 0x0 0x0
0xffff8d8000019200 0001 00000000 0x0 0x0
0xffff8d8000019280 0001 00000000 0x0 0x0
0xffff8d8000019300 0001 00000000 0x0 0x0
0xffff8d8000019380 0001 00000000 0x0 0x0
0xffff8d8000019400 0001 00000000 0x0 0x0
0xffff8d8000019480 0001 00000000 0x0 0x0
0xffff8d8000019500 0001 00000000 0x0 0x0
0xffff8d8000019580 0001 00000000 0x0 0x0
0xffff8d8000019600 0001 00000000 0x0 0x0
0xffff8d8000019680 0001 00000000 0x0 0x0
0xffff8d8000019700 0001 00000000 0x0 0x0
0xffff8d8000019780 0001 00000000 0x0 0x0
0xffff8d8000019800 0001 00000000 0x0 0x0
0xffff8d8000019880 0001 00000000 0x0 0x0
0xffff8d8000019900 0001 00000000 0x0 0x0
0xffff8d8000019980 0001 00000000 0x0 0x0
0xffff8d8000019a00 0001 00000000 0x0 0x0
0xffff8d8000019a80 0001 00000000 0x0 0x0
0xffff8d8000019b00 0001 00000000 0x0 0x0
0xffff8d8000019b80 0001 00000000 0x0 0x0
0xffff8d8000019c00 0001 00000000 0x0 0x0
0xffff8d8000019c80 0001 00000000 0x0 0x0
0xffff8d8000019d00 0001 00000000 0x0 0x0
0xffff8d8000019d80 0001 00000000 0x0 0x0
0xffff8d8000019e00 0001 00000000 0x0 0x0
0xffff8d8000019e80 0001 00000000 0x0 0x0
0xffff8d8000019f00 0001 00000000 0x0 0x0
0xffff8d8000019f80 0001 00000000 0x0 0x0
0xffff8d800001a000 0001 00000000 0x0 0x0
0xffff8d800001a080 0001 00000000 0x0 0x0
0xffff8d800001a100 0001 00000000 0x0 0x0
0xffff8d800001a180 0001 00000000 0x0 0x0
0xffff8d800001a200 0001 00000000 0x0 0x0
0xffff8d800001a280 0001 00000000 0x0 0x0
0xffff8d800001a300 0001 00000000 0x0 0x0
0xffff8d800001a380 0001 00000000 0x0 0x0
0xffff8d800001a400 0001 00000000 0x0 0x0
0xffff8d800001a480 0001 00000000 0x0 0x0
0xffff8d800001a500 0001 00000000 0x0 0x0
0xffff8d800001a580 0001 00000000 0x0 0x0
0xffff8d800001a600 0041 00000000 0x0 0x0
0xffff8d800001a680 0041 00000000 0x0 0x0
0xffff8d800001a700 0041 00000000 0x0 0x0
0xffff8d800001a780 0041 00000000 0x0 0x0
0xffff8d800001a800 0041 00000000 0x0 0x0
0xffff8d800001a880 004

---
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If the bug is already fixed, let syzbot know by replying with:
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syzbot

unread,
Dec 28, 2023, 6:59:14 PM12/28/23
to syzkaller-...@googlegroups.com
Auto-closing this bug as obsolete.
Crashes did not happen for a while, no reproducer and no activity.
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