ASan: Unauthorized Access in vfs_busy

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syzbot

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May 16, 2024, 8:07:37 AMMay 16
to syzkaller-...@googlegroups.com
Hello,

syzbot found the following issue on:

HEAD commit: baab9fc215f6 Add missing stuff for vax
git tree: netbsd
console output: https://syzkaller.appspot.com/x/log.txt?x=11897458980000
kernel config: https://syzkaller.appspot.com/x/.config?x=fab579639ba4bf0a
dashboard link: https://syzkaller.appspot.com/bug?extid=091fd415dd4cb89255a5
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/c6595e54f862/disk-baab9fc2.raw.xz
netbsd.gdb: https://storage.googleapis.com/syzbot-assets/f9dae2a582c5/netbsd-baab9fc2.gdb.xz

IMPORTANT: if you fix the issue, please add the following tag to the commit:
Reported-by: syzbot+091fd4...@syzkaller.appspotmail.com

[ 105.9284479] panic: ASan: Unauthorized Access In 0xffffffff81cec6bf: Addr 0xffff938013e54680 [4 bytes, read, PoolUseAfterFree]

[ 105.9384346] cpu1: Begin traceback...
[ 105.9584641] vpanic() at netbsd:vpanic+0x282 sys/kern/subr_prf.c:288
[ 106.0384403] panic() at netbsd:panic+0x9e sys/kern/subr_prf.c:1084
[ 106.0984444] kasan_report() at netbsd:kasan_report+0x8f kasan_code_name sys/kern/subr_asan.c:169 [inline]
[ 106.0984444] kasan_report() at netbsd:kasan_report+0x8f sys/kern/subr_asan.c:201
[ 106.1384673] __asan_load4() at netbsd:__asan_load4+0x9d kasan_shadow_4byte_isvalid sys/kern/subr_asan.c:351 [inline]
[ 106.1384673] __asan_load4() at netbsd:__asan_load4+0x9d kasan_shadow_check sys/kern/subr_asan.c:418 [inline]
[ 106.1384673] __asan_load4() at netbsd:__asan_load4+0x9d sys/kern/subr_asan.c:1207
[ 106.1784824] vfs_busy() at netbsd:vfs_busy+0x1d _vfs_busy sys/kern/vfs_mount.c:349 [inline]
[ 106.1784824] vfs_busy() at netbsd:vfs_busy+0x1d sys/kern/vfs_mount.c:369
[ 106.2184841] do_sys_fchdir() at netbsd:do_sys_fchdir+0x197 sys/kern/vfs_syscalls.c:1495
[ 106.2584829] sys___syscall() at netbsd:sys___syscall+0x10e sy_call sys/sys/syscallvar.h:65 [inline]
[ 106.2584829] sys___syscall() at netbsd:sys___syscall+0x10e sys/kern/sys_syscall.c:90
[ 106.2984914] syscall() at netbsd:syscall+0x246 sy_call sys/sys/syscallvar.h:65 [inline]
[ 106.2984914] syscall() at netbsd:syscall+0x246 sy_invoke sys/sys/syscallvar.h:94 [inline]
[ 106.2984914] syscall() at netbsd:syscall+0x246 sys/arch/x86/x86/syscall.c:137
[ 106.3084815] --- syscall (number 13 via SYS_syscall) ---
[ 106.3284876] netbsd:syscall+0x246:
[ 106.3284876] cpu1: End traceback...
[ 106.3284876] fatal breakpoint trap in supervisor mode
[ 106.3384919] trap type 1 code 0 rip 0xffffffff8023240d cs 0x8 rflags 0x282 cr2 0x1b33925000 ilevel 0 rsp 0xffff938249680bc0
[ 106.3484661] curlwp 0xffff938013351580 pid 661.655 lowest kstack 0xffff9382496792c0
Stopped in pid 661.655 (syz-executor.5) at netbsd:breakpoint+0x5: leave
?
breakpoint() at netbsd:breakpoint+0x5
db_panic() at netbsd:db_panic+0x105 sys/ddb/db_panic.c:71
vpanic() at netbsd:vpanic+0x282 sys/kern/subr_prf.c:288
panic() at netbsd:panic+0x9e sys/kern/subr_prf.c:1084
kasan_report() at netbsd:kasan_report+0x8f kasan_code_name sys/kern/subr_asan.c:169 [inline]
kasan_report() at netbsd:kasan_report+0x8f sys/kern/subr_asan.c:201
__asan_load4() at netbsd:__asan_load4+0x9d kasan_shadow_4byte_isvalid sys/kern/subr_asan.c:351 [inline]
__asan_load4() at netbsd:__asan_load4+0x9d kasan_shadow_check sys/kern/subr_asan.c:418 [inline]
__asan_load4() at netbsd:__asan_load4+0x9d sys/kern/subr_asan.c:1207
vfs_busy() at netbsd:vfs_busy+0x1d _vfs_busy sys/kern/vfs_mount.c:349 [inline]
vfs_busy() at netbsd:vfs_busy+0x1d sys/kern/vfs_mount.c:369
do_sys_fchdir() at netbsd:do_sys_fchdir+0x197 sys/kern/vfs_syscalls.c:1495
sys___syscall() at netbsd:sys___syscall+0x10e sy_call sys/sys/syscallvar.h:65 [inline]
sys___syscall() at netbsd:sys___syscall+0x10e sys/kern/sys_syscall.c:90
syscall() at netbsd:syscall+0x246 sy_call sys/sys/syscallvar.h:65 [inline]
syscall() at netbsd:syscall+0x246 sy_invoke sys/sys/syscallvar.h:94 [inline]
syscall() at netbsd:syscall+0x246 sys/arch/x86/x86/syscall.c:137
--- syscall (number 13 via SYS_syscall) ---
netbsd:syscall+0x246:
Panic string: ASan: Unauthorized Access In 0xffffffff81cec6bf: Addr 0xffff938013e54680 [4 bytes, read, PoolUseAfterFree]

PID LID S CPU FLAGS STRUCT LWP * NAME WAIT
664 664 3 0 0 ffff938013461980 ifconfig xclow
663 663 3 0 0 ffff938013461100 ifconfig mutex
661 662 3 1 180 ffff938012be61c0 syz-executor.5 parked
661 > 655 7 1 0 ffff938013351580 syz-executor.5
661 661 2 1 10040000 ffff938012d54340 syz-executor.5
660 648 2 1 40000 ffff938013de3640 syz-executor.3
660 660 2 1 10040000 ffff938012cfc680 syz-executor.3
643 643 3 0 180 ffff938012a728c0 syz-executor.0 wait
656 656 3 0 40180 ffff938014198540 syz-executor.4 wait
2487 2487 3 1 180 ffff938012cf3640 syz-executor.2 parked
2911 3251 3 1 11100000 ffff9380133c56c0 syz-executor.2 vfork
2911 2911 3 0 11000000 ffff938012d89080 syz-executor.2 lwpwait
509 509 2 1 140 ffff938012da4940 syz-executor.5
506 506 3 0 180 ffff938012a72040 syz-executor.1 parked
1336 1336 3 0 180 ffff938013fdb080 syz-executor.4 parked
411 411 3 0 1c0 ffff938012c25280 syz-executor.2 wait
403 403 3 0 180 ffff938014198980 syz-executor.5 parked
2609 2609 3 1 180 ffff938013fcc480 syz-executor.4 parked
2380 2380 2 1 140 ffff9380133b0240 syz-executor.3
2013 2013 3 1 180 ffff938012d54bc0 syz-executor.0 parked
2009 2009 3 1 180 ffff938012cb30c0 syz-executor.4 parked
1638 1638 3 1 180 ffff938012cd45c0 syz-executor.4 parked
1239 1211 3 0 180 ffff938013e932c0 syz-fuzzer wait
1239 1074 3 0 180 ffff938013e73b00 syz-fuzzer wait
1239 1208 3 0 180 ffff938013e73280 syz-fuzzer kqueue
1239 1210 3 1 180 ffff938013e47ac0 syz-fuzzer wait
1239 1206 3 0 180 ffff938013e47240 syz-fuzzer wait
1239 1240 3 1 180 ffff938013dc7600 syz-fuzzer parked
1239 829 3 1 180 ffff938013dc71c0 syz-fuzzer wait
1239 1242 3 0 180 ffff938012d24b80 syz-fuzzer parked
1239 449 3 0 180 ffff93801343a780 syz-fuzzer parked
1239 942 3 0 180 ffff938012cd4a00 syz-fuzzer parked
1239 1233 3 1 180 ffff938012a54780 syz-fuzzer parked
1239 1081 3 1 180 ffff938012a54340 syz-fuzzer parked
1239 1239 3 0 180 ffff938012a98080 syz-fuzzer parked
1108 1108 3 0 180 ffff938012ac8500 sshd select
1096 1096 3 1 180 ffff938013461540 getty nanoslp
1226 1226 3 1 180 ffff93801348e5c0 getty nanoslp
1229 1229 3 1 180 ffff9380126d9bc0 getty nanoslp
1223 1223 3 0 180 ffff938012a20b80 getty ttyraw
1103 1103 3 0 180 ffff9380133a2a80 sshd select
958 958 3 1 180 ffff938012d5f040 powerd kqueue
811 811 3 1 180 ffff93801343abc0 syslogd kqueue
606 606 3 0 180 ffff938012c25b00 dhcpcd poll
744 744 3 1 180 ffff938012c256c0 dhcpcd poll
559 559 3 0 180 ffff938012c82bc0 dhcpcd poll
603 603 3 1 180 ffff938012c82780 dhcpcd poll
487 487 3 1 180 ffff938012da40c0 dhcpcd poll
292 292 3 0 180 ffff938012d89900 dhcpcd poll
485 485 2 1 0 ffff938012d894c0 dhcpcd
1 1 3 1 180 ffff938012875180 init wait
0 651 5 0 200 ffff9380133519c0 (zombie)
0 1367 3 1 200 ffff9380129bf280 acctwatch actwat
0 3270 3 1 200 ffff938012cca140 ktrace ktrwait
0 674 3 0 200 ffff9380129bf6c0 physiod physiod
0 196 3 1 200 ffff9380129c1700 pooldrain pooldrain
0 195 3 0 240 ffff9380129c12c0 ioflush biolock
0 194 3 0 200 ffff9380129bfb00 pgdaemon pgdaemon
0 169 3 0 200 ffff938012976ac0 usb7 usbevt
0 172 3 0 200 ffff938012976680 usb6 usbevt
0 170 3 0 200 ffff938012976240 usb5 usbevt
0 168 3 0 200 ffff93801291ea80 usb4 usbevt
0 166 3 0 200 ffff93801291e640 usb3 usbevt
0 165 3 0 200 ffff93801291e200 usb2 usbevt
0 31 3 1 200 ffff9380128caa40 usb1 usbevt
0 63 3 1 200 ffff9380128ca600 usb0 usbevt
0 126 3 1 200 ffff9380128ca1c0 usbtask-dr usbtsk
0 125 3 1 200 ffff938012875a00 usbtask-hc usbtsk
0 124 3 0 200 ffff938010d66b00 swwreboot swwreboot
0 123 3 1 200 ffff9380128755c0 npfgc0 npfgcw
0 122 3 1 200 ffff9380128699c0 rt_free rt_free
0 121 3 1 200 ffff938012869580 unpgc unpgc
0 120 3 0 200 ffff938012869140 key_timehandler key_timehandler
0 119 3 1 200 ffff938012708980 icmp6_wqinput/1 icmp6_wqinput
0 118 3 0 200 ffff938012708540 icmp6_wqinput/0 icmp6_wqinput
0 117 3 1 200 ffff938012708100 nd6_timer nd6_timer
0 116 3 1 200 ffff9380126ff940 carp6_wqinput/1 carp6_wqinput
0 115 3 0 200 ffff9380126ff500 carp6_wqinput/0 carp6_wqinput
0 114 3 1 200 ffff9380126ff0c0 carp_wqinput/1 carp_wqinput
0 113 3 0 200 ffff9380126f1900 carp_wqinput/0 carp_wqinput
0 112 3 1 200 ffff9380126f14c0 icmp_wqinput/1 icmp_wqinput
0 111 3 0 200 ffff9380126f1080 icmp_wqinput/0 icmp_wqinput
0 110 3 0 200 ffff9380126db8c0 rt_timer rt_timer
0 109 3 0 200 ffff9380126d7b80 vmem_rehash vmem_rehash
0 100 3 0 200 ffff9380126d7300 entbutler entropy
0 99 3 1 200 ffff9380120bcb40 viomb balloon
0 98 3 1 200 ffff9380120bc700 vioif0_txrx/1 vioif0_txrx
0 97 3 0 200 ffff9380120bc2c0 vioif0_txrx/0 vioif0_txrx
0 30 3 0 200 ffff938010d666c0 scsibus0 sccomp
0 29 3 0 200 ffff938010d66280 pms0 pmsreset
0 28 2 1 200 ffff938010cacac0 xcall/1
0 27 1 1 200 ffff938010cac680 softser/1
0 26 1 1 200 ffff938010cac240 softclk/1
0 25 1 1 200 ffff938010ca8a80 softbio/1
0 24 1 1 200 ffff938010ca8640 softnet/1
0 23 1 1 201 ffff938010ca8200 idle/1
0 22 3 0 200 ffff93800fb55a40 lnxsyswq lnxsyswq
0 21 3 0 200 ffff93800fb55600 lnxubdwq lnxubdwq
0 20 3 0 200 ffff93800fb551c0 lnxpwrwq lnxpwrwq
0 19 3 0 200 ffff93800fb54a00 lnxlngwq lnxlngwq
0 18 3 0 200 ffff93800fb545c0 lnxhipwq lnxhipwq
0 17 3 0 200 ffff93800fb54180 lnxrcugc lnxrcugc
0 16 3 0 200 ffff93800fb4d9c0 sysmon smtaskq
0 15 3 0 200 ffff93800fb4d580 pmfsuspend pmfsuspend
0 14 3 0 200 ffff93800fb4d140 pmfevent pmfevent
0 13 3 0 200 ffff93800fb4a980 sopendfree sopendfr
0 12 3 0 200 ffff93800fb4a540 ifwdog ifwdog
0 11 3 0 200 ffff93800fb4a100 iflnkst iflnkst
0 10 3 0 200 ffff93800fb3b940 nfssilly nfssilly
0 9 3 0 200 ffff93800fb3b500 pooldisp pooldisp
0 8 3 1 200 ffff93800fb3b0c0 modunload mod_unld
0 7 3 0 200 ffff93800fb32900 xcall/0 xcall
0 6 1 0 200 ffff93800fb324c0 softser/0
0 5 1 0 200 ffff93800fb32080 softclk/0
0 4 1 0 200 ffff93800fb308c0 softbio/0
0 3 1 0 200 ffff93800fb30480 softnet/0
0 > 2 1 0 201 ffff93800fb30040 idle/0
0 0 3 1 200 ffffffff8334fe40 swapper uvm
[Locks tracked through LWPs]

****** LWP 663.663 (ifconfig) @ 0xffff938013461100, l_stat=3

*** Locks held:

* Lock 0 (initialized at netbsd:fork1+0x365 sys/kern/kern_fork.c:366)
lock address : ffff93801342ff50
type : sleep/adaptive
initialized : netbsd:fork1+0x365
shared holds : 0 exclusive: 1
shares wanted: 0 exclusive: 0
relevant cpu : 0 last held: 0
relevant lwp : 0xffff938013461100 last held: 0xffff938013461100
last locked* : netbsd:execve_loadvm+0x308
unlocked : 0
owner/count : 000000000000000000 flags : 000000000000000000
Turnstile: no active turnstile for this lock.

*** Locks wanted: none

****** LWP 660.648 (syz-executor.3) @ 0xffff938013de3640, l_stat=2

*** Locks held:

* Lock 0 (initialized at netbsd:main+0x5e2 sys/kern/init_main.c:623)
lock address : netbsd:acct_lock
type : sleep/adaptive
initialized : netbsd:main+0x5e2
shared holds : 0 exclusive: 1
shares wanted: 0 exclusive: 0
relevant cpu : 1 last held: 1
relevant lwp : 0xffff938013de3640 last held: 0xffff938013de3640
last locked* : netbsd:sys_acct+0x3e3
unlocked : netbsd:acct_process+0x16f
owner/count : 0xffff938013de3640 flags : 0x0000000000000004
Turnstile: no active turnstile for this lock.

* Lock 1 (initialized at netbsd:vcache_alloc+0x3e sys/kern/vfs_vnode.c:1438)
lock address : ffff9380141d32c0
type : sleep/adaptive
initialized : netbsd:vcache_alloc+0x3e
shared holds : 0 exclusive: 1
shares wanted: 0 exclusive: 0
relevant cpu : 1 last held: 1
relevant lwp : 0xffff938013de3640 last held: 0xffff938013de3640
last locked* : netbsd:genfs_lock+0x160
unlocked : netbsd:genfs_unlock+0x2a
owner/count : 0xffff938013de3640 flags : 0x0000000000000004
Turnstile: no active turnstile for this lock.

* Lock 2 (initialized at netbsd:genfs_node_init+0x2e sys/miscfs/genfs/genfs_vnops.c:475)
lock address : ffff93801418bb70
type : sleep/adaptive
initialized : netbsd:genfs_node_init+0x2e
shared holds : 0 exclusive: 1
shares wanted: 0 exclusive: 0
relevant cpu : 1 last held: 1
relevant lwp : 0xffff938013de3640 last held: 0xffff938013de3640
last locked* : netbsd:ffs_truncate+0xfe4
unlocked : netbsd:ufs_balloc_range+0x2a8
owner/count : 0xffff938013de3640 flags : 0x0000000000000004
Turnstile: no active turnstile for this lock.

*** Locks wanted: none

****** LWP 643.643 (syz-executor.0) @ 0xffff938012a728c0, l_stat=3

*** Locks held:

* Lock 0 (initialized at netbsd:kcov_open+0x40 sys/kern/subr_kcov.c:461)
lock address : ffff9380141617c0
type : sleep/adaptive
initialized : netbsd:kcov_open+0x40
shared holds : 0 exclusive: 1
shares wanted: 0 exclusive: 0
relevant cpu : 0 last held: 0
relevant lwp : 0xffff938012a728c0 last held: 0xffff938012a728c0
last locked* : netbsd:kcov_fops_ioctl+0x28
unlocked : 0
owner field : 000000000000000000 wait/spin: 0/0
Turnstile: no active turnstile for this lock.

* Lock 1 (initialized at netbsd:uvm_obj_init+0x9a sys/uvm/uvm_object.c:70)
lock address : ffff938013f57dc0
type : sleep/adaptive
initialized : netbsd:uvm_obj_init+0x9a
shared holds : 0 exclusive: 1
shares wanted: 0 exclusive: 0
relevant cpu : 0 last held: 0
relevant lwp : 0xffff938012a728c0 last held: 0xffff938012a728c0
last locked* : netbsd:uvm_fault_internal+0x1e72
unlocked : netbsd:uvm_fault_lower_enter+0x579
owner/count : 000000000000000000 flags : 000000000000000000
Turnstile: no active turnstile for this lock.

*** Locks wanted: none

****** LWP 2911.2911 (syz-executor.2) @ 0xffff938012d89080, l_stat=3

*** Locks held:

* Lock 0 (initialized at netbsd:fork1+0x1230 sys/kern/kern_fork.c:377)
lock address : ffff93801419aa00
type : sleep/adaptive
initialized : netbsd:fork1+0x1230
shared holds : 0 exclusive: 1
shares wanted: 0 exclusive: 0
relevant cpu : 0 last held: 0
relevant lwp : 0xffff938012d89080 last held: 0xffff938012d89080
last locked* : netbsd:cv_timedwait+0x181
unlocked : netbsd:cv_timedwait+0x14b
owner field : 000000000000000000 wait/spin: 0/0
Turnstile: no active turnstile for this lock.

*** Locks wanted: none

****** LWP 744.744 (dhcpcd) @ 0xffff938012c256c0, 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 : 0xffff938012c256c0 last held: 000000000000000000
last locked : 0
unlocked* : 0
owner field : 000000000000000000 wait/spin: 0/0
Turnstile: no active turnstile for this lock.

****** LWP 559.559 (dhcpcd) @ 0xffff938012c82bc0, 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 : 0xffff938012c82bc0 last held: 000000000000000000
last locked : 0
unlocked* : 0
owner field : 000000000000000000 wait/spin: 0/0
Turnstile: no active turnstile for this lock.

****** LWP 292.292 (dhcpcd) @ 0xffff938012d89900, 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 : 0xffff938012d89900 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) @ 0xffff938012d894c0, l_stat=2

*** 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 : 0xffff938012d894c0 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) @ 0xffff938010cac240, 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 : 0xffff938010cac240 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) @ 0xffff93800fb4a100, 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 : 0xffff93800fb4a100 last held: 000000000000000000
last locked : 0
unlocked* : 0
owner field : 000000000000000000 wait/spin: 0/0
Turnstile: no active turnstile for this lock.

****** LWP 0.5 (softclk/0) @ 0xffff93800fb32080, 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 : 0 last held: 0
relevant lwp : 0xffff93800fb32080 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) @ 0xffffffff8334fe40, 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 : 0xffffffff8334fe40 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+0x61 sys/kern/subr_prf.c:156)
lock address : netbsd:kprintf_mtx
type : spin
initialized : netbsd:kprintf_init+0x61
shared holds : 0 exclusive: 1
shares wanted: 0 exclusive: 0
relevant cpu : 1 last held: 1
relevant lwp : 0xffff938013351580 last held: 0xffff938013351580
last locked* : netbsd:kprintf_lock+0x33
unlocked : netbsd:kprintf_unlock+0x53
owner field : 0x0000000000000800 wait/spin: 0/1

PAGE FLAG PQ UOBJECT UANON
0xffff938000017180 0041 00000000 0x0 0x0
0xffff938000017200 0041 00000000 0x0 0x0
0xffff938000017280 0041 00000000 0x0 0x0
0xffff938000017300 0041 00000000 0x0 0x0
0xffff938000017380 0041 00000000 0x0 0x0
0xffff938000017400 0041 00000000 0x0 0x0
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0xffff938000026600 0001 00000000 0x0 0x0
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0xffff938000029600 0001 00000000 0x0 0x0
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0xffff938000029700 0001 00000000 0x0 0x0
0xffff938000029780 0001 00000000 0x0 0x0
0xffff938000029800 0001 00000000 0x0 0x0
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0xffff938000029a00 0001 00000000 0x0 0x0
0xffff938000029a80 0001 00000000 0x0 0x0
0xffff938000029b00 0001 00000000 0x0 0x0
0xffff938000029b80 0001 00000000 0x0 0x0
0xffff938000029c00 0001

---
This report is generated by a bot. It may contain errors.
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If the report is already addressed, let syzbot know by replying with:
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