syzbot


uvm_fault: db_enter (4)

Status: upstream: reported on 2022/06/24 13:39
Reported-by: syzbot+da8475c2e1f922c4ebd6@syzkaller.appspotmail.com
First crash: 227d, last: 17h53m
similar bugs (3):
Kernel Title Repro Cause bisect Fix bisect Count Last Reported Patched Status
openbsd uvm_fault: db_enter (2) 1 271d 271d 0/3 closed as invalid on 2022/05/11 17:28
openbsd uvm_fault: db_enter 43 930d 984d 0/3 closed as dup on 2020/05/30 07:36
openbsd uvm_fault: db_enter (3) 1 241d 241d 0/3 closed as invalid on 2022/06/11 05:12

Sample crash report:
uvm_fault(fffffd807effa898,25e52c52000,0,2) at uvm_fault+0x238
upageflttrap(ffff80002af93b70,25e52c52000) at upageflttrap+0x85 sys/arch/amd64/amd64/trap.c:186
usertrap(ffff80002af93b70) at usertrap+0x204 sys/arch/amd64/amd64/trap.c:438
recall_trap() at recall_trap+0x8
end of kernel
end trace frame: 0x25e00762600, count: -13
ddb{0}> machine ddbcpu 1
Stopped at      db_enter+0x18:  addq    $0x8,%rsp
ddb{1}> trace
db_enter() at db_enter+0x18 sys/arch/amd64/amd64/db_interface.c:437
witness_checkorder(fffffd807514d5f8,9,0) at witness_checkorder+0x10b7 witness_debugger sys/kern/subr_witness.c:2502 [inline]
witness_checkorder(fffffd807514d5f8,9,0) at witness_checkorder+0x10b7 sys/kern/subr_witness.c:1105
rw_enter(fffffd807514d5e8,81) at rw_enter+0xd1 sys/kern/kern_rwlock.c:250
rrw_enter(fffffd807514d5e8,81) at rrw_enter+0x8b sys/kern/kern_rwlock.c:465
VOP_LOCK(fffffd805e312370,81) at VOP_LOCK+0x87 sys/kern/vfs_vops.c:518
vn_lock(fffffd805e312370,81) at vn_lock+0x84 sys/kern/vfs_vnops.c:564
uvn_io(fffffd8075695388,ffff8000283758e0,1,23,1) at uvn_io+0x31a sys/uvm/uvm_vnode.c:1263
uvn_put(fffffd8075695388,ffff8000283758e0,1,23) at uvn_put+0xd0 sys/uvm/uvm_vnode.c:926
uvm_pager_put(fffffd8075695388,fffffd8007fb52e0,ffff800028375978,ffff8000283759b8,23,0,7e0491697eb2690f) at uvm_pager_put+0x137 sys/uvm/uvm_pager.c:545
uvn_flush(fffffd8075695388,0,1000,3) at uvn_flush+0x532 sys/uvm/uvm_vnode.c:725
uvm_map_clean(fffffd8069a9e540,20000000,20002000,3) at uvm_map_clean+0x71b sys/uvm/uvm_map.c:4703
syscall(ffff800028375bb0) at syscall+0x555 mi_syscall sys/sys/syscall_mi.h:113 [inline]
syscall(ffff800028375bb0) at syscall+0x555 sys/arch/amd64/amd64/trap.c:626
Xsyscall() at Xsyscall+0x128
end of kernel
end trace frame: 0xdc6564fccc0, count: -13

Crashes (21):
Manager Time Kernel Commit Syzkaller Config Log Report Syz repro C repro VM info Assets Title
ci-openbsd-multicore 2023/02/06 13:24 openbsd 6c1aad9dfe4c 0a9c11b6 .config console log report [disk image] [bsd.gdb] [kernel image] uvm_fault: db_enter
ci-openbsd-multicore 2023/02/03 04:48 openbsd a9dd6dd9c022 33fc5c09 .config console log report [disk image] [bsd.gdb] [kernel image] uvm_fault: db_enter
ci-openbsd-multicore 2023/02/02 09:27 openbsd 026480396ae3 16d19e30 .config console log report [disk image] [bsd.gdb] [kernel image] uvm_fault: db_enter
ci-openbsd-multicore 2023/01/29 11:51 openbsd 7173161c5823 b68fb8d6 .config console log report [disk image] [bsd.gdb] [kernel image] uvm_fault: db_enter
ci-openbsd-multicore 2023/01/11 10:27 openbsd 86a45bbd35a5 48bc529a .config console log report [disk image] [bsd.gdb] [kernel image] uvm_fault: db_enter
ci-openbsd-multicore 2023/01/09 12:55 openbsd 86a45bbd35a5 1dac8c7a .config console log report [disk image] [bsd.gdb] [kernel image] uvm_fault: db_enter
ci-openbsd-multicore 2023/01/07 00:16 openbsd 86a45bbd35a5 1dac8c7a .config console log report [disk image] [bsd.gdb] [kernel image] uvm_fault: db_enter
ci-openbsd-multicore 2023/01/06 03:46 openbsd 86a45bbd35a5 1dac8c7a .config console log report [disk image] [bsd.gdb] [kernel image] uvm_fault: db_enter
ci-openbsd-multicore 2023/01/05 01:01 openbsd 86a45bbd35a5 1dac8c7a .config console log report [disk image] [bsd.gdb] [kernel image] uvm_fault: db_enter
ci-openbsd-multicore 2023/01/03 22:35 openbsd 86a45bbd35a5 1dac8c7a .config console log report [disk image] [bsd.gdb] [kernel image] uvm_fault: db_enter
ci-openbsd-multicore 2022/12/22 12:29 openbsd 6a5148d0c915 c692fab1 .config console log report [disk image] [bsd.gdb] [kernel image] uvm_fault: db_enter
ci-openbsd-multicore 2022/11/25 19:49 openbsd 69f07918e001 75740b3f .config console log report [disk image] [bsd.gdb] [kernel image] uvm_fault: db_enter
ci-openbsd-multicore 2022/10/27 02:57 openbsd ddb514ca016c 86777b7f .config console log report [disk image] [bsd.gdb] [kernel image] uvm_fault: db_enter
ci-openbsd-multicore 2022/10/20 15:20 openbsd d5241874c244 b31320fc .config console log report [disk image] [bsd.gdb] [kernel image] uvm_fault: db_enter
ci-openbsd-multicore 2022/09/12 04:40 openbsd a7bd9199e024 356d8217 .config console log report uvm_fault: db_enter
ci-openbsd-multicore 2022/09/04 03:42 openbsd c3a3d6092d41 28811d0a .config console log report uvm_fault: db_enter
ci-openbsd-multicore 2022/08/27 19:37 openbsd 475112fd38b6 07177916 .config console log report uvm_fault: db_enter
ci-openbsd-multicore 2022/08/27 17:49 openbsd 475112fd38b6 07177916 .config console log report uvm_fault: db_enter
ci-openbsd-multicore 2022/08/10 02:44 openbsd 9170c2da45e8 c2a623d6 .config console log report uvm_fault: db_enter
ci-openbsd-multicore 2022/08/04 06:56 openbsd 7400b1070705 1c9013ac .config console log report uvm_fault: db_enter
ci-openbsd-multicore 2022/06/24 13:38 openbsd 7aef5fd99b1d a5dbd430 .config console log report uvm_fault: db_enter
* Struck through repros no longer work on HEAD.