panic: LOCKDEBUG: Reader / writer lock error: rw_vector_enter,305: locking against myselfuhub3: device problem, disablin

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syzbot

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Feb 18, 2021, 1:49:17 PM2/18/21
to syzkaller-...@googlegroups.com
Hello,

syzbot found the following issue on:

HEAD commit: 59ee1e30 make(1): replace global preserveUndefined with VA..
git tree: netbsd
console output: https://syzkaller.appspot.com/x/log.txt?x=17e6a434d00000
kernel config: https://syzkaller.appspot.com/x/.config?x=fab579639ba4bf0a
dashboard link: https://syzkaller.appspot.com/bug?extid=ed13e3f714c4141ec12d
compiler: g++ (Ubuntu 5.4.0-6ubuntu1~16.04.12) 5.4.0 20160609

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

IMPORTANT: if you fix the issue, please add the following tag to the commit:
Reported-by: syzbot+ed13e3...@syzkaller.appspotmail.com

[ 86.2970767] panic: LOCKDEBUG: Reader / writer lock error: rw_vector_enter,305: locking against myselfuhub3: device problem, disabling port 1

[ 86.3062674] cpu0: Begin traceback...
[ 86.3221105] vpanic() at netbsd:vpanic+0x265 syzkaller/managers/netbsd/kernel/sys/kern/subr_prf.c:290
[ 86.3721048] snprintf() at netbsd:snprintf
[ 86.4221119] lockdebug_more() at netbsd:lockdebug_more
[ 86.4721044] lockdebug_wantlock() at netbsd:lockdebug_wantlock+0x34f syzkaller/managers/netbsd/kernel/sys/kern/subr_lockdebug.c:482
[ 86.5221041] rw_enter() at netbsd:rw_enter+0x796 syzkaller/managers/netbsd/kernel/sys/kern/kern_rwlock.c:305
[ 86.5721055] uvm_fault_internal() at netbsd:uvm_fault_internal+0x34d uvmfault_lookup syzkaller/managers/netbsd/kernel/sys/uvm/uvm_fault_i.h:128 [inline]
[ 86.5721055] uvm_fault_internal() at netbsd:uvm_fault_internal+0x34d uvm_fault_check syzkaller/managers/netbsd/kernel/sys/uvm/uvm_fault.c:987 [inline]
[ 86.5721055] uvm_fault_internal() at netbsd:uvm_fault_internal+0x34d syzkaller/managers/netbsd/kernel/sys/uvm/uvm_fault.c:897
[ 86.6221062] trap() at netbsd:trap+0xb3a syzkaller/managers/netbsd/kernel/sys/arch/amd64/amd64/trap.c:520
[ 86.6321063] --- trap (number 6) ---
[ 86.6721040] __asan_load8() at netbsd:__asan_load8+0x6c kasan_shadow_8byte_isvalid syzkaller/managers/netbsd/kernel/sys/kern/subr_asan.c:362 [inline]
[ 86.6721040] __asan_load8() at netbsd:__asan_load8+0x6c kasan_shadow_check syzkaller/managers/netbsd/kernel/sys/kern/subr_asan.c:420 [inline]
[ 86.6721040] __asan_load8() at netbsd:__asan_load8+0x6c syzkaller/managers/netbsd/kernel/sys/kern/subr_asan.c:1207
[ 86.7221051] uvm_page_owner_locked_p() at netbsd:uvm_page_owner_locked_p+0x37 syzkaller/managers/netbsd/kernel/sys/uvm/uvm_page.c:2055
[ 86.7721056] uvm_pageunwire() at netbsd:uvm_pageunwire+0x22 syzkaller/managers/netbsd/kernel/sys/uvm/uvm_page.c:1814
[ 86.8121045] uvm_fault_unwire_locked() at netbsd:uvm_fault_unwire_locked+0x338 syzkaller/managers/netbsd/kernel/sys/uvm/uvm_fault.c:2723
[ 86.8621038] uvm_unmap_remove() at netbsd:uvm_unmap_remove+0x508 uvm_map_entry_unwire syzkaller/managers/netbsd/kernel/sys/uvm/uvm_map.c:873 [inline]
[ 86.8621038] uvm_unmap_remove() at netbsd:uvm_unmap_remove+0x508 syzkaller/managers/netbsd/kernel/sys/uvm/uvm_map.c:2222
[ 86.9121052] uvm_map_enter() at netbsd:uvm_map_enter+0x7ee syzkaller/managers/netbsd/kernel/sys/uvm/uvm_map.c:1336
[ 86.9621078] uvm_map() at netbsd:uvm_map+0x20b syzkaller/managers/netbsd/kernel/sys/uvm/uvm_map.c:1099
[ 87.0121049] uvm_mmap.part.0() at netbsd:uvm_mmap.part.0+0x2f9
[ 87.0721047] sys_mmap() at netbsd:sys_mmap+0x942 uvm_mmap syzkaller/managers/netbsd/kernel/sys/uvm/uvm_mmap.c:401 [inline]
[ 87.0721047] sys_mmap() at netbsd:sys_mmap+0x942 syzkaller/managers/netbsd/kernel/sys/uvm/uvm_mmap.c:401
[ 87.1121048] sys___syscall() at netbsd:sys___syscall+0xff sy_call syzkaller/managers/netbsd/kernel/sys/sys/syscallvar.h:65 [inline]
[ 87.1121048] sys___syscall() at netbsd:sys___syscall+0xff syzkaller/managers/netbsd/kernel/sys/kern/sys_syscall.c:77
[ 87.1721054] syscall() at netbsd:syscall+0x259 sy_call syzkaller/managers/netbsd/kernel/sys/sys/syscallvar.h:65 [inline]
[ 87.1721054] syscall() at netbsd:syscall+0x259 sy_invoke syzkaller/managers/netbsd/kernel/sys/sys/syscallvar.h:94 [inline]
[ 87.1721054] syscall() at netbsd:syscall+0x259 syzkaller/managers/netbsd/kernel/sys/arch/x86/x86/syscall.c:138
[ 87.1821056] --- syscall (number 198) ---
[ 87.2021076] netbsd:syscall+0x259:
[ 87.2021076] cpu0: End traceback...
[ 87.2021076] fatal breakpoint trap in supervisor mode
[ 87.2128492] trap type 1 code 0 rip 0xffffffff80220a2d cs 0x8 rflags 0x286 cr2 0xffff90001bd5b7dd ilevel 0 rsp 0xffffbb81a9c77ea0
[ 87.2262010] curlwp 0xffffbb8013c9c940 pid 1096.1753 lowest kstack 0xffffbb81a9c712c0
Stopped in pid 1096.1753 (syz-executor.1) at netbsd:breakpoint+0x5: leave
?
breakpoint() at netbsd:breakpoint+0x5
db_panic() at netbsd:db_panic+0x105 syzkaller/managers/netbsd/kernel/sys/ddb/db_panic.c:67
vpanic() at netbsd:vpanic+0x265 syzkaller/managers/netbsd/kernel/sys/kern/subr_prf.c:290
snprintf() at netbsd:snprintf
lockdebug_more() at netbsd:lockdebug_more
lockdebug_wantlock() at netbsd:lockdebug_wantlock+0x34f syzkaller/managers/netbsd/kernel/sys/kern/subr_lockdebug.c:482
rw_enter() at netbsd:rw_enter+0x796 syzkaller/managers/netbsd/kernel/sys/kern/kern_rwlock.c:305
uvm_fault_internal() at netbsd:uvm_fault_internal+0x34d uvmfault_lookup syzkaller/managers/netbsd/kernel/sys/uvm/uvm_fault_i.h:128 [inline]
uvm_fault_internal() at netbsd:uvm_fault_internal+0x34d uvm_fault_check syzkaller/managers/netbsd/kernel/sys/uvm/uvm_fault.c:987 [inline]
uvm_fault_internal() at netbsd:uvm_fault_internal+0x34d syzkaller/managers/netbsd/kernel/sys/uvm/uvm_fault.c:897
trap() at netbsd:trap+0xb3a syzkaller/managers/netbsd/kernel/sys/arch/amd64/amd64/trap.c:520
--- trap (number 6) ---
__asan_load8() at netbsd:__asan_load8+0x6c kasan_shadow_8byte_isvalid syzkaller/managers/netbsd/kernel/sys/kern/subr_asan.c:362 [inline]
__asan_load8() at netbsd:__asan_load8+0x6c kasan_shadow_check syzkaller/managers/netbsd/kernel/sys/kern/subr_asan.c:420 [inline]
__asan_load8() at netbsd:__asan_load8+0x6c syzkaller/managers/netbsd/kernel/sys/kern/subr_asan.c:1207
uvm_page_owner_locked_p() at netbsd:uvm_page_owner_locked_p+0x37 syzkaller/managers/netbsd/kernel/sys/uvm/uvm_page.c:2055
uvm_pageunwire() at netbsd:uvm_pageunwire+0x22 syzkaller/managers/netbsd/kernel/sys/uvm/uvm_page.c:1814
uvm_fault_unwire_locked() at netbsd:uvm_fault_unwire_locked+0x338 syzkaller/managers/netbsd/kernel/sys/uvm/uvm_fault.c:2723
uvm_unmap_remove() at netbsd:uvm_unmap_remove+0x508 uvm_map_entry_unwire syzkaller/managers/netbsd/kernel/sys/uvm/uvm_map.c:873 [inline]
uvm_unmap_remove() at netbsd:uvm_unmap_remove+0x508 syzkaller/managers/netbsd/kernel/sys/uvm/uvm_map.c:2222
uvm_map_enter() at netbsd:uvm_map_enter+0x7ee syzkaller/managers/netbsd/kernel/sys/uvm/uvm_map.c:1336
uvm_map() at netbsd:uvm_map+0x20b syzkaller/managers/netbsd/kernel/sys/uvm/uvm_map.c:1099
uvm_mmap.part.0() at netbsd:uvm_mmap.part.0+0x2f9
sys_mmap() at netbsd:sys_mmap+0x942 uvm_mmap syzkaller/managers/netbsd/kernel/sys/uvm/uvm_mmap.c:401 [inline]
sys_mmap() at netbsd:sys_mmap+0x942 syzkaller/managers/netbsd/kernel/sys/uvm/uvm_mmap.c:401
sys___syscall() at netbsd:sys___syscall+0xff sy_call syzkaller/managers/netbsd/kernel/sys/sys/syscallvar.h:65 [inline]
sys___syscall() at netbsd:sys___syscall+0xff syzkaller/managers/netbsd/kernel/sys/kern/sys_syscall.c:77
syscall() at netbsd:syscall+0x259 sy_call syzkaller/managers/netbsd/kernel/sys/sys/syscallvar.h:65 [inline]
syscall() at netbsd:syscall+0x259 sy_invoke syzkaller/managers/netbsd/kernel/sys/sys/syscallvar.h:94 [inline]
syscall() at netbsd:syscall+0x259 syzkaller/managers/netbsd/kernel/sys/arch/x86/x86/syscall.c:138
--- syscall (number 198) ---
netbsd:syscall+0x259:
Panic string: LOCKDEBUG: Reader / writer lock error: rw_vector_enter,305: locking against myself
PID LID S CPU FLAGS STRUCT LWP * NAME WAIT
1948 1873 3 0 180 ffffbb8013c9c500 syz-executor.2 parked
1948 2022 2 0 100 ffffbb8013a33b80 syz-executor.2
1948 1948 2 0 10000000 ffffbb801478d540 syz-executor.2
1882 1988 3 0 180 ffffbb80154b6080 syz-executor.0 parked
1882 2096 2 1 100 ffffbb8013c472c0 syz-executor.0
1882 1882 2 1 10000000 ffffbb8013cdba40 syz-executor.0
1089 1095 2 0 0 ffffbb80154b6900 syz-executor.3
1089 2126 2 0 100 ffffbb8013c808c0 syz-executor.3
1089 1831 3 0 180 ffffbb80147c8180 syz-executor.3 poll
1089 2084 2 1 100 ffffbb8013d05b00 syz-executor.3
1089 1089 2 1 10000140 ffffbb8013d05280 syz-executor.3
1096 2093 3 0 0 ffffbb80154b64c0 syz-executor.1 tstile
1096 >1753 7 0 0 ffffbb8013c9c940 syz-executor.1
1096 1999 3 1 0 ffffbb8013dc3900 syz-executor.1 tstile
1096 1096 3 1 10000000 ffffbb8013d1db40 syz-executor.1 tstile
2023 1966 2 1 100 ffffbb8013c47700 syz-executor.4
2023 1987 3 0 180 ffffbb80147c85c0 syz-executor.4 netio
2023 2023 2 1 10000140 ffffbb8013cdb1c0 syz-executor.4
1994 2018 2 1 100 ffffbb8013beca80 syz-executor.5
1994 1994 2 0 10000000 ffffbb8013d6bbc0 syz-executor.5
1734 1734 3 1 180 ffffbb801547b480 syz-executor.5 parked
716 716 3 0 180 ffffbb8014889500 syz-executor.5 parked
1101 1101 2 1 140 ffffbb80152f0200 syz-executor.5
422 422 2 1 140 ffffbb8015279a40 syz-executor.2
957 957 2 1 140 ffffbb8015279600 syz-executor.4
1078 1078 2 0 140 ffffbb80152791c0 syz-executor.3
1073 1073 2 1 140 ffffbb801513ba00 syz-executor.1
939 939 2 0 140 ffffbb8013abe4c0 syz-executor.0
1068 1086 2 0 140 ffffbb801513b180 syz-fuzzer
1068 810 3 0 180 ffffbb8014841b00 syz-fuzzer parked
1068 1084 3 0 180 ffffbb80148416c0 syz-fuzzer parked
1068 1071 3 1 180 ffffbb8014841280 syz-fuzzer parked
1068 1077 2 0 100 ffffbb8013c47b40 syz-fuzzer
1068 1081 3 0 1c0 ffffbb80147d8a40 syz-fuzzer parked
1068 1076 2 1 140 ffffbb8014861b80 syz-fuzzer
1068 1068 3 0 180 ffffbb8013a9a480 syz-fuzzer parked
1079 1079 3 0 180 ffffbb8013abe080 sshd select
947 947 3 0 180 ffffbb80136ed340 getty nanoslp
1104 1104 3 0 180 ffffbb80148c1140 getty nanoslp
1097 1097 3 1 180 ffffbb80136e9700 getty nanoslp
1056 1056 3 0 1c0 ffffbb8013959a80 getty ttyraw
965 965 3 1 180 ffffbb80147d8600 sshd select
937 937 3 0 180 ffffbb8013d4eb80 powerd kqueue
868 868 3 0 180 ffffbb8014855b40 syslogd kqueue
599 599 3 1 180 ffffbb8013c11b00 dhcpcd poll
598 598 3 0 180 ffffbb8013c904c0 dhcpcd poll
597 597 3 1 180 ffffbb8013c04240 dhcpcd poll
578 578 3 1 180 ffffbb8013c5d300 dhcpcd poll
350 350 3 0 180 ffffbb8013d888c0 dhcpcd poll
349 349 3 0 180 ffffbb8013d88480 dhcpcd poll
348 348 3 1 180 ffffbb8013d88040 dhcpcd poll
1 1 3 0 180 ffffbb801385c140 init wait
0 895 3 0 200 ffffbb801398c240 physiod physiod
0 192 3 0 200 ffffbb801398e280 pooldrain pooldrain
0 163 2 0 240 ffffbb801398cac0 ioflush
0 168 3 1 200 ffffbb801398c680 pgdaemon pgdaemon
0 162 3 1 200 ffffbb8013959640 usb7 usbevt
0 161 3 1 200 ffffbb8013959200 usb6 usbevt
0 31 2 0 240 ffffbb801390ba40 usb5
0 63 3 0 200 ffffbb801390b600 usb4 usbevt
0 126 3 1 200 ffffbb801390b1c0 usb3 usbevt
0 125 3 1 200 ffffbb80138b9a00 usb2 usbevt
0 124 3 1 200 ffffbb80138b95c0 usb1 usbevt
0 123 3 1 200 ffffbb80138b9180 usb0 usbevt
0 122 3 0 200 ffffbb801385c9c0 usbtask-dr usbtsk
0 121 3 1 200 ffffbb801385c580 usbtask-hc usbtsk
0 120 3 0 200 ffffbb8010dbbac0 npfgc0 npfgcw
0 119 3 0 200 ffffbb801384b980 rt_free rt_free
0 118 3 0 200 ffffbb801384b540 unpgc unpgc
0 117 2 0 200 ffffbb801384b100 key_timehandler
0 116 3 1 200 ffffbb801371b940 icmp6_wqinput/1 icmp6_wqinput
0 115 3 0 200 ffffbb801371b500 icmp6_wqinput/0 icmp6_wqinput
0 114 2 0 200 ffffbb801371b0c0 nd6_timer
0 113 3 1 200 ffffbb8013711900 carp6_wqinput/1 carp6_wqinput
0 112 3 0 200 ffffbb80137114c0 carp6_wqinput/0 carp6_wqinput
0 111 3 1 200 ffffbb8013711080 carp_wqinput/1 carp_wqinput
0 110 3 0 200 ffffbb80137008c0 carp_wqinput/0 carp_wqinput
0 109 3 1 200 ffffbb8013700480 icmp_wqinput/1 icmp_wqinput
0 108 3 0 200 ffffbb8013700040 icmp_wqinput/0 icmp_wqinput
0 107 3 1 200 ffffbb80136edbc0 rt_timer rt_timer
0 106 3 1 200 ffffbb80136ed780 vmem_rehash vmem_rehash
0 105 3 1 200 ffffbb80136ecb80 entbutler entropy
0 96 3 1 200 ffffbb80130c0b00 viomb balloon
0 30 3 1 200 ffffbb80130c06c0 vioif0_txrx/1 vioif0_txrx
0 29 2 0 200 ffffbb80130c0280 vioif0_txrx/0
0 27 3 0 200 ffffbb8010dbb680 scsibus0 sccomp
0 26 3 0 200 ffffbb8010dbb240 pms0 pmsreset
0 25 3 1 200 ffffbb8010d0ea80 xcall/1 xcall
0 24 1 1 200 ffffbb8010d0e640 softser/1
0 23 1 1 200 ffffbb8010d0e200 softclk/1
0 22 1 1 200 ffffbb8010d0ca40 softbio/1
0 21 1 1 200 ffffbb8010d0c600 softnet/1
0 20 1 1 201 ffffbb8010d0c1c0 idle/1
0 19 3 0 200 ffffbb800f77da00 lnxpwrwq lnxpwrwq
0 18 3 0 200 ffffbb800f77d5c0 lnxlngwq lnxlngwq
0 17 3 0 200 ffffbb800f77d180 lnxsyswq lnxsyswq
0 16 3 0 200 ffffbb800f7759c0 lnxrcugc lnxrcugc
0 15 3 0 200 ffffbb800f775580 sysmon smtaskq
0 14 3 0 200 ffffbb800f775140 pmfsuspend pmfsuspend
0 13 3 0 200 ffffbb800f771980 pmfevent pmfevent
0 12 3 0 200 ffffbb800f771540 sopendfree sopendfr
0 11 3 0 200 ffffbb800f771100 iflnkst iflnkst
0 10 3 0 200 ffffbb800f766940 nfssilly nfssilly
0 9 3 0 200 ffffbb800f766500 vdrain vdrain
0 8 3 0 200 ffffbb800f7660c0 modunload mod_unld
0 7 3 0 200 ffffbb800f758900 xcall/0 xcall
0 6 1 0 200 ffffbb800f7584c0 softser/0
0 5 1 0 200 ffffbb800f758080 softclk/0
0 4 1 0 200 ffffbb800f7568c0 softbio/0
0 3 1 0 200 ffffbb800f756480 softnet/0
0 2 1 0 201 ffffbb800f756040 idle/0
0 > 0 7 1 240 ffffffff82eee940 swapper
[Locks tracked through LWPs]

****** LWP 1096.2093 (syz-executor.1) @ 0xffffbb80154b64c0, l_stat=3

*** Locks held: none

*** Locks wanted:

* Lock 0 (initialized at uvm_map_setup)
lock address : 0xffffbb8013d728c0 type : sleep/adaptive
initialized : 0xffffffff81850062
shared holds : 0 exclusive: 1
shares wanted: 2 exclusive: 0
relevant cpu : 0 last held: 0
relevant lwp : 0xffffbb80154b64c0 last held: 0xffffbb8013c9c940
last locked* : 0xffffffff81849832 unlocked : 0xffffffff8183aa50
owner/count : 0xffffbb8013c9c940 flags : 0x0000000000000007
Turnstile:
=> 2 waiting readers: 0xffffbb80154b64c0 0xffffbb8013d1db40
=> 1 waiting writers: 0xffffbb8013dc3900

****** LWP 1096.1753 (syz-executor.1) @ 0xffffbb8013c9c940, l_stat=7

*** Locks held:

* Lock 0 (initialized at uvm_map_setup)
lock address : 0xffffbb8013d728c0 type : sleep/adaptive
initialized : 0xffffffff81850062
shared holds : 0 exclusive: 1
shares wanted: 2 exclusive: 0
relevant cpu : 0 last held: 0
relevant lwp : 0xffffbb8013c9c940 last held: 0xffffbb8013c9c940
last locked* : 0xffffffff81849832 unlocked : 0xffffffff8183aa50
owner/count : 0xffffbb8013c9c940 flags : 0x0000000000000007
Turnstile:
=> 2 waiting readers: 0xffffbb80154b64c0 0xffffbb8013d1db40
=> 1 waiting writers: 0xffffbb8013dc3900

* Lock 1 (initialized at uvm_obj_init)
lock address : 0xffffbb80150a3600 type : sleep/adaptive
initialized : 0xffffffff8185d75a
shared holds : 0 exclusive: 1
shares wanted: 0 exclusive: 0
relevant cpu : 0 last held: 0
relevant lwp : 0xffffbb8013c9c940 last held: 0xffffbb8013c9c940
last locked* : 0xffffffff818502cb unlocked : 0xffffffff81850362
owner/count : 0xffffbb8013c9c940 flags : 0x0000000000000004
Turnstile: no active turnstile for this lock.

*** Locks wanted: none

****** LWP 598.598 (dhcpcd) @ 0xffffbb8013c904c0, l_stat=3

*** Locks held: none

*** Locks wanted:

* Lock 0 (initialized at module_hook_init)
lock address : 0xffffffff82ff68c0 type : sleep/adaptive
initialized : 0xffffffff818e1d61
shared holds : 0 exclusive: 0
shares wanted: 0 exclusive: 0
relevant cpu : 0 last held: 0
relevant lwp : 0xffffbb8013c904c0 last held: 000000000000000000
last locked : 000000000000000000 unlocked*: 000000000000000000
owner field : 000000000000000000 wait/spin: 0/0
Turnstile: no active turnstile for this lock.

****** LWP 597.597 (dhcpcd) @ 0xffffbb8013c04240, l_stat=3

*** Locks held: none

*** Locks wanted:

* Lock 0 (initialized at module_hook_init)
lock address : 0xffffffff82ff68c0 type : sleep/adaptive
initialized : 0xffffffff818e1d61
shared holds : 0 exclusive: 0
shares wanted: 0 exclusive: 0
relevant cpu : 1 last held: 0
relevant lwp : 0xffffbb8013c04240 last held: 000000000000000000
last locked : 000000000000000000 unlocked*: 000000000000000000
owner field : 000000000000000000 wait/spin: 0/0
Turnstile: no active turnstile for this lock.

****** LWP 349.349 (dhcpcd) @ 0xffffbb8013d88480, l_stat=3

*** Locks held: none

*** Locks wanted:

* Lock 0 (initialized at module_hook_init)
lock address : 0xffffffff82ff68c0 type : sleep/adaptive
initialized : 0xffffffff818e1d61
shared holds : 0 exclusive: 0
shares wanted: 0 exclusive: 0
relevant cpu : 0 last held: 0
relevant lwp : 0xffffbb8013d88480 last held: 000000000000000000
last locked : 000000000000000000 unlocked*: 000000000000000000
owner field : 000000000000000000 wait/spin: 0/0
Turnstile: no active turnstile for this lock.

****** LWP 348.348 (dhcpcd) @ 0xffffbb8013d88040, l_stat=3

*** Locks held: none

*** Locks wanted:

* Lock 0 (initialized at module_hook_init)
lock address : 0xffffffff82ff68c0 type : sleep/adaptive
initialized : 0xffffffff818e1d61
shared holds : 0 exclusive: 0
shares wanted: 0 exclusive: 0
relevant cpu : 1 last held: 0
relevant lwp : 0xffffbb8013d88040 last held: 000000000000000000
last locked : 000000000000000000 unlocked*: 000000000000000000
owner field : 000000000000000000 wait/spin: 0/0
Turnstile: no active turnstile for this lock.

****** LWP 0.23 (softclk/1) @ 0xffffbb8010d0e200, l_stat=1

*** Locks held: none

*** Locks wanted:

* Lock 0 (initialized at module_hook_init)
lock address : 0xffffffff82ff68c0 type : sleep/adaptive
initialized : 0xffffffff818e1d61
shared holds : 0 exclusive: 0
shares wanted: 0 exclusive: 0
relevant cpu : 1 last held: 0
relevant lwp : 0xffffbb8010d0e200 last held: 000000000000000000
last locked : 000000000000000000 unlocked*: 000000000000000000
owner field : 000000000000000000 wait/spin: 0/0
Turnstile: no active turnstile for this lock.

****** LWP 0.11 (iflnkst) @ 0xffffbb800f771100, l_stat=3

*** Locks held: none

*** Locks wanted:

* Lock 0 (initialized at module_hook_init)
lock address : 0xffffffff82ff68c0 type : sleep/adaptive
initialized : 0xffffffff818e1d61
shared holds : 0 exclusive: 0
shares wanted: 0 exclusive: 0
relevant cpu : 0 last held: 0
relevant lwp : 0xffffbb800f771100 last held: 000000000000000000
last locked : 000000000000000000 unlocked*: 000000000000000000
owner field : 000000000000000000 wait/spin: 0/0
Turnstile: no active turnstile for this lock.

[Locks tracked through CPUs]

PAGE FLAG PQ UOBJECT UANON
0xffffbb8000017180 0041 00000000 0x0 0x0
0xffffbb8000017200 0041 00000000 0x0 0x0
0xffffbb8000017280 0041 00000000 0x0 0x0
0xffffbb8000017300 0041 00000000 0x0 0x0
0xffffbb8000017380 0041 00000000 0x0 0x0
0xffffbb8000017400 0041 00000000 0x0 0x0
0xffffbb8000017480 0041 00000000 0x0 0x0
0xffffbb8000017500 0041 00000000 0x0 0x0
0xffffbb8000017580 0041 00000000 0x0 0x0
0xffffbb8000017600 0041 00000000 0x0 0x0
0xffffbb8000017680 0041 00000000 0x0 0x0
0xffffbb8000017700 0041 00000000 0x0 0x0
0xffffbb8000017780 0041 00000000 0x0 0x0
0xffffbb8000017800 0041 00000000 0x0 0x0
0xffffbb8000017880 0041 00000000 0x0 0x0
0xffffbb8000017900 0041 00000000 0x0 0x0
0xffffbb8000017980 0041 00000000 0x0 0x0
0xffffbb8000017a00 0041 00000000 0x0 0x0
0xffffbb8000017a80 0041 00000000 0x0 0x0
0xffffbb8000017b00 0041 00000000 0x0 0x0
0xffffbb8000017b80 0041 00000000 0x0 0x0
0xffffbb8000017c00 0041 00000000 0x0 0x0
0xffffbb8000017c80 0041 00000000 0x0 0x0
0xffffbb8000017d00 0041 00000000 0x0 0x0
0xffffbb8000017d80 0041 00000000 0x0 0x0
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0xffffbb8000025d80 0001 00000000 0x0 0x0
0xffffbb8000025e00 0001 00000000 0x0 0x0
0xffffbb8000025e80 0001 00000000 0x0 0x0
0xffffbb8000025f00 0001 00000000 0x0 0x0
0xffffbb8000025f80 0001 00000000 0x0 0x0
0xffffbb8000026000 0001 00000000 0x0 0x0
0xffffbb8000026080 0001 00000000 0x0 0x0
0xffffbb8000026100 0001 00000000 0x0 0x0
0xffffbb8000026180 0001 00000000 0x0 0x0
0xffffbb8000026200 0001 00000000 0x0 0x0
0xffffbb8000026280 0001 00000000 0x0 0x0
0xffffbb8000026300 0001 00000000 0x0 0x0
0xffffbb8000026380 0001 00000000 0x0 0x0
0xffffbb8000026400 0001 00000000 0x0 0x0
0xffffbb8000026480 0001 00000000 0x0 0x0
0xffffbb8000026500 0001 00000000 0x0 0x0
0xffffbb8000026580 0001 00000000 0x0 0x0
0xffffbb8000026600 0001 00000000 0x0 0x0
0xffffbb8000026680 0001 00000000 0x0 0x0
0xffffbb8000026700 0001 00000000 0x0 0x0
0xffffbb8000026780 0001 00000000 0x0 0x0
0xffffbb8000026800 0001 00000000 0x0 0x0
0xffffbb8000026880 0001 00000000 0x0 0x0
0xffffbb8000026900 0001 00000000 0x0 0x0
0xffffbb8000026980 0001 00000000 0x0 0x0
0xffffbb8000026a00 0001 00000000 0x0 0x0
0xffffbb8000026a80 0001 00000000 0x0 0x0
0xffffbb8000026b00 0001 00000000 0x0 0x0
0xffffbb8000026b80 0001 00000000 0x0 0x0
0xffffbb8000026c00 0001 00000000 0x0 0x0
0xffffbb8000026c80 0001 00000000 0x0 0x0
0xffffbb8000026d00 0001 00000000 0x0 0x0
0xffffbb8000026d80 0001 00000000 0x0 0x0
0xffffbb8000026e00 0001 00000000 0x0 0x0
0xffffbb8000026e80 0001 00000000 0x0 0x0
0xffffbb8000026f00 0001 00000000 0x0 0x0
0xffffbb8000026f80 0001 00000000 0x0 0x0
0xffffbb8000027000 0001 00000000 0x0 0x0
0xffffbb8000027080 0001 00000000 0x0 0x0
0xffffbb8000027100 0001 00000000 0x0 0x0
0xffffbb8000027180 0001 00000000 0x0 0x0
0xffffbb8000027200 0001 00000000 0x0 0x0
0xffffbb8000027280 0001 00000000 0x0 0x0
0xffffbb8000027300 0001 00000000 0x0 0x0
0xffffbb8000027380 0001 00000000 0x0 0x0
0xffffbb8000027400 0001 00000000 0x0 0x0
0xffffbb8000027480 0001 00000000 0x0 0x0
0xffffbb8000027500 0001 00000000 0x0 0x0
0xffffbb8000027580 0001 00000000 0x0 0x0
0xffffbb8000027600 0001 00000000 0x0 0x0
0xffffbb8000027680 0001 00000000 0x0 0x0
0xffffbb8000027700 0001 00000000 0x0 0x0
0xffffbb8000027780 0001 00000000 0x0 0x0
0xffffbb8000027800 0001 00000000 0x0 0x0
0xffffbb8000027880 0001 00000000 0x0 0x0
0xffffbb8000027900 0001 00000000 0x0 0x0
0xffffbb8000027980 0001 00000000 0x0 0x0
0xffffbb8000027a00 0001 00000000 0x0 0x0
0xffffbb8000027a80 0001 00000000 0x0 0x0
0xffffbb8000027b00 0001 00000000 0x0 0x0
0xffffbb8000027b80 0001 00000000 0x0 0x0
0xffffbb8000027c00 0001 00000000 0x0 0x0
0xffffbb8000027c80 0001 00000000 0x0 0x0
0xffffbb8000027d00 0001 00000000 0x0 0x0
0xffffbb8000027d80 0001 00000000 0x0 0x0
0xffffbb8000027e00 0001 00000000 0x0 0x0
0xffffbb8000027e80 0001 00000000 0x0 0x0
0xffffbb8000027f00 0001 00000000 0x0 0x0
0xffffbb8000027f80 0001 00000000 0x0 0x0
0xffffbb8000028000 0001 00000000 0x0 0x0
0xffffbb8000028080 0001 00000000 0x0 0x0
0xffffbb8000028100 0001 00000000 0x0 0x0
0xffffbb8000028180 0001 00000000 0x0 0x0
0xffffbb8000028200 0001 00000000 0x0 0x0
0xffffbb8000028280 0001 00000000 0x0 0x0
0xffffbb8000028300 0001 00000000 0x0 0x0
0xffffbb8000028380 0001 00000000 0x0 0x0
0xffffbb8000028400 0001 00000000 0x0 0x0
0xffffbb8000028480 0001 00000000 0x0 0x0
0xffffbb8000028500 0001 00000000 0x0 0x0
0xffffbb8000028580 0001 00000000 0x0 0x0
0xffffbb8000028600 0001 00000000 0x0 0x0
0xffffbb8000028680 0001 00000000 0x0 0x0
0xffffbb8000028700 0001 00000000 0x0 0x0
0xffffbb8000028780 0001 00000000 0x0 0x0
0xffffbb8000028800 0001 00000000 0x0 0x0
0xffffbb8000028880 0001 00000000 0x0 0x0
0xffffbb8000028900 0001 00000000 0x0 0x0
0xffffbb8000028980 0001 00000000 0x0 0x0
0xffffbb8000028a00 0001 00000000 0x0 0x0
0xffffbb8000028a80 0001 00000000 0x0 0x0
0xffffbb8000028b00 0001 00000000 0x0 0x0
0xffffbb8000028b80 0001 00000000 0x0 0x0
0xffffbb8000028c00 0001 00000000 0x0 0x0
0xffffbb8000028c80 0001 00000000 0x0 0x0
0xffffbb8000028d00 0001 00000000 0x0 0x0
0xffffbb8000028d80 0001 00000000 0x0 0x0
0xffffbb8000028e00 0001 00000000 0x0 0x0
0xffffbb8000028e80 0001 00000000 0x0 0x0
0xffffbb8000028f00 0001 00000000 0x0 0x0
0xffffbb8000028f80 0001 00000000 0x0 0x0
0xffffbb8000029000 0001 00000000 0x0 0x0
0xffffbb8000029080 0001 00000000 0x0 0x0
0xffffbb8000029100 0001 00000000 0x0 0x0
0xffffbb8000029180 0001 00000000 0x0 0x0
0xffffbb8000029200 0001 00000000 0x0 0x0
0xffffbb8000029280 0001 00000000 0x0 0x0
0xffffbb8000029300 0001 00000000 0x0 0x0
0xffffbb8000029380 0001 00000000 0x0 0x0
0xffffbb8000029400 0001 00000000 0x0 0x0
0xffffbb8000029480 0001 00000000 0x0 0x0
0xffffbb8000029500 0001 00000000 0x0 0x0
0xffffbb8000029580 0001 00000000 0x0 0x0
0xffffbb8000029600 0001 00000000 0x0 0x0
0xffffbb8000029680 0001 00000000 0x0 0x0
0xffffbb8000029700 0001 00000000 0x0 0x0
0xffffbb8000029780 0001 00000000 0x0 0x0
0xffffbb8000029800 0001 00000000 0x0 0x0
0xffffbb8000029880 0001 00000000 0x0 0x0
0xffffbb8000029900 0001 00000000 0x0 0x0
0xffffbb8000029980 0001 00000000 0x0 0x0
0xffffbb8000029a00 0001 00000000 0x0 0x0
0xffffbb8000029a80 0001 00000000 0x0 0x0
0xffffbb8000029b00 0001 00000000 0x0 0x0
0xffffbb8000029b80 0001 00000000 0x0 0x0
0xffffbb8000029c00 0001 00000000 0x0 0x0
0xffffbb8000029c80 0001 00000000 0x0 0x0
0xffffbb8000029d00 0001 00000000 0x0 0x0
0xffffbb8000029d80 0001 00000000 0x0 0x0
0xffffbb8000029e00 0001 00000000 0x0 0x0
0xffffbb8000029e80 0001 00000000 0x0 0x0
0xffffbb8000029f00 0001 00000000 0x0 0x0
0xffffbb8000029f80 0001 00000000 0x0 0x0
0xffffbb800002a000 0001 00000000 0x0 0x0
0xffffbb800002a080 0001 00000000 0x0 0x0
0xffffbb800002a100 0001 00000000 0x0 0x0
0xffffbb800002a180 0001 00000000 0x0 0x0
0xffffbb800002a200 0001 00000000 0x0 0x0
0xffffbb800002a280 0001 00000000 0x0 0x0
0xffffbb800002a300 0001 00000000 0x0 0x0
0xffffbb800002a380 0001 00000000 0x0 0x0
0xffffbb800002a400 0001 00000000 0x0 0x0
0xffffbb800002a480 0001 00000000 0x0 0x0
0xffffbb800002a500 0001 00000000 0x0 0x0
0xffffbb800002a580 0001 00000000 0x0 0x0
0xffffbb800002a600 0001 00000000 0x0 0x0
0xffffbb800002a680 0001 00000000 0x0 0x0
0xffffbb800002a700 0001 00000000 0x0 0x0
0xffffbb800002a780 0001 00000000 0x0 0x0
0xffffbb800002a800 0001 00000000 0x0 0x0
0xffffbb800002a880 0001 00000000 0x0 0x0
0xffffbb800002a900 0001 00000000 0x0 0x0
0xffffbb800002a980 0001 00000000

---
This report is generated by a bot. It may contain errors.
See https://goo.gl/tpsmEJ for more information about syzbot.
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syzbot

unread,
May 19, 2021, 2:49:16 PM5/19/21
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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