uvm_fault: amap_lookups

Status: upstream: reported on 2026/07/14 00:24
Reported-by: syzbot+7651266b7ef13d67cc1a@syzkaller.appspotmail.com
First crash: 19d, last: 14h37m

Sample crash report:
uvm_fault(0xfffffc006d1938b0, 0x2b17, 0, 1) -> e
kernel: page fault trap, code=0
Stopped at      amap_lookups+0x1e0:     movl    0x10(%r15),%r14d
    TID    PID    UID     PRFLAGS     PFLAGS  CPU  COMMAND
*486183   8876      0           0          0    0  syz-executor
amap_lookups(fffffc0065ce3268,1000,ffff8000338bd500,8) at amap_lookups+0x1e0 amap_chunk_get sys/uvm/uvm_amap.c:118 [inline]
amap_lookups(fffffc0065ce3268,1000,ffff8000338bd500,8) at amap_lookups+0x1e0 sys/uvm/uvm_amap.c:1168
uvm_fault_check(ffff8000338bd600,ffff8000338bd638,ffff8000338bd670,0) at uvm_fault_check+0x840 sys/uvm/uvm_fault.c:840
uvm_fault(fffffc006d1938b0,362c00f8000,0,1) at uvm_fault+0xe6 sys/uvm/uvm_fault.c:627
upageflttrap(ffff8000338bd7a0,362c00f8fc0) at upageflttrap+0xa0 sys/arch/amd64/amd64/trap.c:192
usertrap(ffff8000338bd7a0) at usertrap+0x413 sys/arch/amd64/amd64/trap.c:640
recall_trap() at recall_trap+0x8
end of kernel
end trace frame: 0x74455efcead0, count: 9
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> 

Crashes (49):
Time Kernel Commit Syzkaller Config Log Report Syz repro C repro VM info Assets (help?) Manager Title
2026/08/02 02:31 openbsd f8480ad0276a e611ffe1 .config console log report [disk image] [bsd.gdb] [kernel image] ci-openbsd-main uvm_fault: amap_lookups
2026/08/01 21:54 openbsd 59ec3ab4d107 e611ffe1 .config console log report [disk image] [bsd.gdb] [kernel image] ci-openbsd-main uvm_fault: amap_lookups
2026/08/01 18:43 openbsd 59ec3ab4d107 e611ffe1 .config console log report [disk image] [bsd.gdb] [kernel image] ci-openbsd-setuid uvm_fault: amap_lookups
2026/08/01 01:21 openbsd ec875f0e6c74 e611ffe1 .config console log report [disk image] [bsd.gdb] [kernel image] ci-openbsd-setuid uvm_fault: amap_lookups
2026/07/31 22:37 openbsd ec875f0e6c74 e611ffe1 .config console log report [disk image] [bsd.gdb] [kernel image] ci-openbsd-setuid uvm_fault: amap_lookups
2026/07/31 13:22 openbsd 6bf809100faf db462e94 .config console log report [disk image] [bsd.gdb] [kernel image] ci-openbsd-setuid uvm_fault: amap_lookups
2026/07/29 18:06 openbsd 92d0a7b388e6 b63596d1 .config console log report [disk image] [bsd.gdb] [kernel image] ci-openbsd-setuid uvm_fault: amap_lookups
2026/07/29 16:12 openbsd 92d0a7b388e6 b63596d1 .config console log report [disk image] [bsd.gdb] [kernel image] ci-openbsd-setuid uvm_fault: amap_lookups
2026/07/29 15:50 openbsd 92d0a7b388e6 b63596d1 .config console log report [disk image] [bsd.gdb] [kernel image] ci-openbsd-setuid uvm_fault: amap_lookups
2026/07/29 14:14 openbsd 92d0a7b388e6 b63596d1 .config console log report [disk image] [bsd.gdb] [kernel image] ci-openbsd-setuid uvm_fault: amap_lookups
2026/07/29 05:05 openbsd 7c9a09f11f52 19622d9d .config console log report [disk image] [bsd.gdb] [kernel image] ci-openbsd-main uvm_fault: amap_lookups
2026/07/28 06:01 openbsd 02abc4651138 45ae1df4 .config console log report [disk image] [bsd.gdb] [kernel image] ci-openbsd-setuid uvm_fault: amap_lookups
2026/07/27 09:03 openbsd 03525b20a4f0 492bab15 .config console log report [disk image] [bsd.gdb] [kernel image] ci-openbsd-main uvm_fault: amap_lookups
2026/07/27 07:40 openbsd 03525b20a4f0 492bab15 .config console log report [disk image] [bsd.gdb] [kernel image] ci-openbsd-setuid uvm_fault: amap_lookups
2026/07/27 01:38 openbsd d2534f409959 492bab15 .config console log report [disk image] [bsd.gdb] [kernel image] ci-openbsd-setuid uvm_fault: amap_lookups
2026/07/25 22:23 openbsd d6cf5170b77f 492bab15 .config console log report [disk image] [bsd.gdb] [kernel image] ci-openbsd-setuid uvm_fault: amap_lookups
2026/07/25 10:57 openbsd f3d8a5574675 492bab15 .config console log report [disk image] [bsd.gdb] [kernel image] ci-openbsd-setuid uvm_fault: amap_lookups
2026/07/24 23:59 openbsd 969775618695 dd737a83 .config console log report [disk image] [bsd.gdb] [kernel image] ci-openbsd-setuid uvm_fault: amap_lookups
2026/07/24 17:50 openbsd 969775618695 dd737a83 .config console log report [disk image] [bsd.gdb] [kernel image] ci-openbsd-setuid uvm_fault: amap_lookups
2026/07/24 17:15 openbsd 969775618695 dd737a83 .config console log report [disk image] [bsd.gdb] [kernel image] ci-openbsd-multicore uvm_fault: amap_lookups
2026/07/24 11:35 openbsd 691001c74c47 544adce9 .config console log report [disk image] [bsd.gdb] [kernel image] ci-openbsd-setuid uvm_fault: amap_lookups
2026/07/24 09:35 openbsd 691001c74c47 544adce9 .config console log report [disk image] [bsd.gdb] [kernel image] ci-openbsd-main uvm_fault: amap_lookups
2026/07/24 08:59 openbsd 691001c74c47 544adce9 .config console log report [disk image] [bsd.gdb] [kernel image] ci-openbsd-main uvm_fault: amap_lookups
2026/07/24 04:37 openbsd 691001c74c47 544adce9 .config console log report [disk image] [bsd.gdb] [kernel image] ci-openbsd-setuid uvm_fault: amap_lookups
2026/07/24 00:46 openbsd 691001c74c47 544adce9 .config console log report [disk image] [bsd.gdb] [kernel image] ci-openbsd-setuid uvm_fault: amap_lookups
2026/07/23 15:44 openbsd 6c9531571979 71a13572 .config console log report [disk image] [bsd.gdb] [kernel image] ci-openbsd-setuid uvm_fault: amap_lookups
2026/07/22 08:26 openbsd e524649e2c66 b561ce9c .config console log report [disk image] [bsd.gdb] [kernel image] ci-openbsd-main uvm_fault: amap_lookups
2026/07/22 05:42 openbsd e524649e2c66 b561ce9c .config console log report [disk image] [bsd.gdb] [kernel image] ci-openbsd-setuid uvm_fault: amap_lookups
2026/07/21 16:58 openbsd 20200149c668 7c5de9c3 .config console log report [disk image] [bsd.gdb] [kernel image] ci-openbsd-main uvm_fault: amap_lookups
2026/07/21 12:40 openbsd 20200149c668 7c5de9c3 .config console log report [disk image] [bsd.gdb] [kernel image] ci-openbsd-setuid uvm_fault: amap_lookups
2026/07/21 06:02 openbsd d55fd7dd01df de6a700d .config console log report [disk image] [bsd.gdb] [kernel image] ci-openbsd-setuid uvm_fault: amap_lookups
2026/07/21 01:07 openbsd d55fd7dd01df de6a700d .config console log report [disk image] [bsd.gdb] [kernel image] ci-openbsd-setuid uvm_fault: amap_lookups
2026/07/20 03:16 openbsd 16594d90c4be 72524a66 .config console log report [disk image] [bsd.gdb] [kernel image] ci-openbsd-multicore uvm_fault: amap_lookups
2026/07/19 21:59 openbsd 2fc221d2874b 72524a66 .config console log report [disk image] [bsd.gdb] [kernel image] ci-openbsd-multicore uvm_fault: amap_lookups
2026/07/19 07:35 openbsd fc1b4e4caf7d 72524a66 .config console log report [disk image] [bsd.gdb] [kernel image] ci-openbsd-setuid uvm_fault: amap_lookups
2026/07/19 03:44 openbsd fc1b4e4caf7d 72524a66 .config console log report [disk image] [bsd.gdb] [kernel image] ci-openbsd-setuid uvm_fault: amap_lookups
2026/07/18 23:29 openbsd bc321d44d2f5 72524a66 .config console log report [disk image] [bsd.gdb] [kernel image] ci-openbsd-setuid uvm_fault: amap_lookups
2026/07/18 22:50 openbsd bc321d44d2f5 72524a66 .config console log report [disk image] [bsd.gdb] [kernel image] ci-openbsd-setuid uvm_fault: amap_lookups
2026/07/18 18:52 openbsd bc321d44d2f5 72524a66 .config console log report [disk image] [bsd.gdb] [kernel image] ci-openbsd-setuid uvm_fault: amap_lookups
2026/07/18 06:35 openbsd 97f4e10dc0be 72524a66 .config console log report [disk image] [bsd.gdb] [kernel image] ci-openbsd-multicore uvm_fault: amap_lookups
2026/07/17 15:08 openbsd 94b919120046 7f27c57a .config console log report [disk image] [bsd.gdb] [kernel image] ci-openbsd-main uvm_fault: amap_lookups
2026/07/15 23:01 openbsd 5b4a77182f82 27a8bd60 .config console log report [disk image] [bsd.gdb] [kernel image] ci-openbsd-multicore uvm_fault: amap_lookups
2026/07/15 20:58 openbsd 5b4a77182f82 27a8bd60 .config console log report [disk image] [bsd.gdb] [kernel image] ci-openbsd-main uvm_fault: amap_lookups
2026/07/15 15:12 openbsd af68cf7bb0f1 a4ed0f4f .config console log report [disk image] [bsd.gdb] [kernel image] ci-openbsd-main uvm_fault: amap_lookups
2026/07/15 07:15 openbsd c070732167b6 2130f682 .config console log report [disk image] [bsd.gdb] [kernel image] ci-openbsd-main uvm_fault: amap_lookups
2026/07/15 02:23 openbsd c070732167b6 2130f682 .config console log report [disk image] [bsd.gdb] [kernel image] ci-openbsd-setuid uvm_fault: amap_lookups
2026/07/14 02:47 openbsd 925b83c94733 2130f682 .config console log report [disk image] [bsd.gdb] [kernel image] ci-openbsd-setuid uvm_fault: amap_lookups
2026/07/14 00:24 openbsd 925b83c94733 2130f682 .config console log report [disk image] [bsd.gdb] [kernel image] ci-openbsd-setuid uvm_fault: amap_lookups
* Struck through repros no longer work on HEAD.