uvm_fault: Xsyscall

Status: closed as dup on 2026/08/16 00:04
Reported-by: syzbot+3fddeb49ebd3bae6a730@syzkaller.appspotmail.com
First crash: 8d11h, last: 4d21h
Duplicate of
Title Rank 🛈 Repro Cause bisect Fix bisect Count Last Reported
uvm_fault: dovutimens -1 323266 4d21h 148d

Sample crash report:
uvm_fault(0xfffff3806ced2200, 0x98, 0, 1) -> e
kernel: page fault trap, code=0
Stopped at      dovutimens+0x368:       movl    0x98(%rax),%r12d
--db_more--               TID    PID    UID     PRFLAGS     PFLAGS  CPU  COMMAND
--db_more--           *315664  12029      0           0  0x4000000    0K syz-executor
--db_more--           dovutimens(ffff80003c406028,fffff3805ba1b7f0,ffff80003c44f780) at dovutimens+0x368 sys/kern/vfs_syscalls.c:2691
--db_more--           sys_futimes(ffff80003c406028,ffff80003c44f8d0,ffff80003c44f820) at sys_futimes+0x208 sys/kern/vfs_syscalls.c:2733
--db_more--           syscall(ffff80003c44f8d0) at syscall+0xb17 mi_syscall sys/sys/syscall_mi.h:176 [inline]
--db_more--           syscall(ffff80003c44f8d0) at syscall+0xb17 sys/arch/amd64/amd64/trap.c:783
Xsyscall() at Xsyscall+0x128
end of kernel
end trace frame: 0x68cf19719c0, count: 11
--db_more--           https://www.openbsd.org/ddb.html describes the minimum info required in bug
--db_more--           reports.  Insufficient info makes it difficult to find and fix bugs.
ddb{0}> ines = 0
No such command
ddb{0}> set $maxwidth = 0
ddb{0}> show panic
*cpu0: uvm_fault(0xfffff3806ced2200, 0x98, 0, 1) -> e
ddb{0}> show kasan
No such command
ddb{0}> trace
dovutimens(ffff80003c406028,fffff3805ba1b7f0,ffff80003c44f780) at dovutimens+0x368 sys/kern/vfs_syscalls.c:2691
sys_futimes(ffff80003c406028,ffff80003c44f8d0,ffff80003c44f820) at sys_futimes+0x208 sys/kern/vfs_syscalls.c:2733
syscall(ffff80003c44f8d0) at syscall+0xb17 mi_syscall sys/sys/syscall_mi.h:176 [inline]
syscall(ffff80003c44f8d0) at syscall+0xb17 sys/arch/amd64/amd64/trap.c:783
--db_more--           Xsyscall() at Xsyscall+0x128
--db_more--           end of kernel
--db_more--           end trace frame: 0x68cf19719c0, count: -4
ddb{0}> w registers
Symbol not found
ddb{0}> show proc
PROC (syz-executor) tid=315664 pid=12029 tcnt=3 stat=onproc
    flags process=0 proc=4000000<THREAD>
    runpri=32, usrpri=50, slppri=32, nice=20
--db_more--               wchan=0x0, wmesg=, ps_single=0x0 scnt=0 ecnt=0
--db_more--               forw=0xffffffffffffffff, list=0xffff80003c406a88,0xffff800045fee2c0
--db_more--               process=0xffff80002a37e1c8 user=0xffff80003c44a000, vmspace=0xfffff3806ced2200
--db_more--               estcpu=36, cpticks=0, pctcpu=0.0, user=0, sys=0, intr=0
ddb{0}> how all locks
No such command
ddb{0}> 

Crashes (55):
Time Kernel Commit Syzkaller Config Log Report Syz repro C repro VM info Assets (help?) Manager Title
2026/08/16 00:54 openbsd b903a0834f41 746171ee .config console log report [disk image] [bsd.gdb] [kernel image] ci-openbsd-multicore uvm_fault: Xsyscall
2026/08/15 22:48 openbsd b903a0834f41 746171ee .config console log report [disk image] [bsd.gdb] [kernel image] ci-openbsd-multicore uvm_fault: Xsyscall
2026/08/15 21:34 openbsd b903a0834f41 746171ee .config console log report [disk image] [bsd.gdb] [kernel image] ci-openbsd-multicore uvm_fault: Xsyscall
2026/08/15 20:09 openbsd b903a0834f41 746171ee .config console log report [disk image] [bsd.gdb] [kernel image] ci-openbsd-multicore uvm_fault: Xsyscall
2026/08/15 18:12 openbsd b903a0834f41 746171ee .config console log report [disk image] [bsd.gdb] [kernel image] ci-openbsd-multicore uvm_fault: Xsyscall
2026/08/15 15:27 openbsd b903a0834f41 746171ee .config console log report [disk image] [bsd.gdb] [kernel image] ci-openbsd-multicore uvm_fault: Xsyscall
2026/08/15 09:40 openbsd a536f3ad0739 746171ee .config console log report [disk image] [bsd.gdb] [kernel image] ci-openbsd-multicore uvm_fault: Xsyscall
2026/08/15 08:32 openbsd a536f3ad0739 746171ee .config console log report [disk image] [bsd.gdb] [kernel image] ci-openbsd-multicore uvm_fault: Xsyscall
2026/08/15 07:31 openbsd a536f3ad0739 746171ee .config console log report [disk image] [bsd.gdb] [kernel image] ci-openbsd-multicore uvm_fault: Xsyscall
2026/08/15 06:54 openbsd a536f3ad0739 746171ee .config console log report [disk image] [bsd.gdb] [kernel image] ci-openbsd-multicore uvm_fault: Xsyscall
2026/08/15 05:47 openbsd a536f3ad0739 746171ee .config console log report [disk image] [bsd.gdb] [kernel image] ci-openbsd-multicore uvm_fault: Xsyscall
2026/08/15 03:15 openbsd a536f3ad0739 746171ee .config console log report [disk image] [bsd.gdb] [kernel image] ci-openbsd-multicore uvm_fault: Xsyscall
2026/08/15 02:32 openbsd a536f3ad0739 746171ee .config console log report [disk image] [bsd.gdb] [kernel image] ci-openbsd-multicore uvm_fault: Xsyscall
2026/08/15 02:05 openbsd a536f3ad0739 746171ee .config console log report [disk image] [bsd.gdb] [kernel image] ci-openbsd-multicore uvm_fault: Xsyscall
2026/08/15 00:43 openbsd a536f3ad0739 746171ee .config console log report [disk image] [bsd.gdb] [kernel image] ci-openbsd-multicore uvm_fault: Xsyscall
2026/08/14 22:59 openbsd a536f3ad0739 746171ee .config console log report [disk image] [bsd.gdb] [kernel image] ci-openbsd-multicore uvm_fault: Xsyscall
2026/08/14 21:18 openbsd 7d89a3e82316 6f9b3e89 .config console log report [disk image] [bsd.gdb] [kernel image] ci-openbsd-multicore uvm_fault: Xsyscall
2026/08/14 20:17 openbsd 7d89a3e82316 6f9b3e89 .config console log report [disk image] [bsd.gdb] [kernel image] ci-openbsd-multicore uvm_fault: Xsyscall
2026/08/14 20:16 openbsd 7d89a3e82316 6f9b3e89 .config console log report [disk image] [bsd.gdb] [kernel image] ci-openbsd-multicore uvm_fault: Xsyscall
2026/08/14 17:59 openbsd 7d89a3e82316 6f9b3e89 .config console log report [disk image] [bsd.gdb] [kernel image] ci-openbsd-multicore uvm_fault: Xsyscall
2026/08/14 17:03 openbsd 7d89a3e82316 6f9b3e89 .config console log report [disk image] [bsd.gdb] [kernel image] ci-openbsd-multicore uvm_fault: Xsyscall
2026/08/14 15:45 openbsd 7d89a3e82316 6f9b3e89 .config console log report [disk image] [bsd.gdb] [kernel image] ci-openbsd-multicore uvm_fault: Xsyscall
2026/08/14 15:20 openbsd 7d89a3e82316 6f9b3e89 .config console log report [disk image] [bsd.gdb] [kernel image] ci-openbsd-multicore uvm_fault: Xsyscall
2026/08/14 13:24 openbsd 7d89a3e82316 6f9b3e89 .config console log report [disk image] [bsd.gdb] [kernel image] ci-openbsd-multicore uvm_fault: Xsyscall
2026/08/14 12:32 openbsd 7d89a3e82316 6f9b3e89 .config console log report [disk image] [bsd.gdb] [kernel image] ci-openbsd-multicore uvm_fault: Xsyscall
2026/08/14 12:27 openbsd 7d89a3e82316 6f9b3e89 .config console log report [disk image] [bsd.gdb] [kernel image] ci-openbsd-multicore uvm_fault: Xsyscall
2026/08/14 11:24 openbsd 7d89a3e82316 6f9b3e89 .config console log report [disk image] [bsd.gdb] [kernel image] ci-openbsd-multicore uvm_fault: Xsyscall
2026/08/14 11:19 openbsd 7d89a3e82316 6f9b3e89 .config console log report [disk image] [bsd.gdb] [kernel image] ci-openbsd-multicore uvm_fault: Xsyscall
2026/08/14 10:50 openbsd 7d89a3e82316 6f9b3e89 .config console log report [disk image] [bsd.gdb] [kernel image] ci-openbsd-multicore uvm_fault: Xsyscall
2026/08/14 09:45 openbsd 52741ec3fdca b13552fe .config console log report [disk image] [bsd.gdb] [kernel image] ci-openbsd-multicore uvm_fault: Xsyscall
2026/08/14 07:47 openbsd 52741ec3fdca b13552fe .config console log report [disk image] [bsd.gdb] [kernel image] ci-openbsd-multicore uvm_fault: Xsyscall
2026/08/14 07:45 openbsd 52741ec3fdca b13552fe .config console log report [disk image] [bsd.gdb] [kernel image] ci-openbsd-multicore uvm_fault: Xsyscall
2026/08/14 06:36 openbsd 52741ec3fdca b13552fe .config console log report [disk image] [bsd.gdb] [kernel image] ci-openbsd-multicore uvm_fault: Xsyscall
2026/08/14 05:34 openbsd 52741ec3fdca b13552fe .config console log report [disk image] [bsd.gdb] [kernel image] ci-openbsd-multicore uvm_fault: Xsyscall
2026/08/14 02:50 openbsd 52741ec3fdca b13552fe .config console log report [disk image] [bsd.gdb] [kernel image] ci-openbsd-multicore uvm_fault: Xsyscall
2026/08/13 23:49 openbsd 52741ec3fdca b13552fe .config console log report [disk image] [bsd.gdb] [kernel image] ci-openbsd-multicore uvm_fault: Xsyscall
2026/08/13 17:17 openbsd b8ee6bbd8ccb 4d118901 .config console log report [disk image] [bsd.gdb] [kernel image] ci-openbsd-multicore uvm_fault: Xsyscall
2026/08/13 09:00 openbsd a63ea9f8f0de 359b2492 .config console log report [disk image] [bsd.gdb] [kernel image] ci-openbsd-multicore uvm_fault: Xsyscall
2026/08/13 05:52 openbsd a63ea9f8f0de 359b2492 .config console log report [disk image] [bsd.gdb] [kernel image] ci-openbsd-multicore uvm_fault: Xsyscall
2026/08/13 05:13 openbsd a63ea9f8f0de 359b2492 .config console log report [disk image] [bsd.gdb] [kernel image] ci-openbsd-multicore uvm_fault: Xsyscall
2026/08/13 03:45 openbsd a63ea9f8f0de 359b2492 .config console log report [disk image] [bsd.gdb] [kernel image] ci-openbsd-multicore uvm_fault: Xsyscall
2026/08/13 02:23 openbsd a63ea9f8f0de 359b2492 .config console log report [disk image] [bsd.gdb] [kernel image] ci-openbsd-multicore uvm_fault: Xsyscall
2026/08/13 01:35 openbsd a63ea9f8f0de 359b2492 .config console log report [disk image] [bsd.gdb] [kernel image] ci-openbsd-multicore uvm_fault: Xsyscall
2026/08/12 16:30 openbsd 2610791609b5 ee03bfea .config console log report [disk image] [bsd.gdb] [kernel image] ci-openbsd-multicore uvm_fault: Xsyscall
2026/08/12 12:49 openbsd 2610791609b5 ee03bfea .config console log report [disk image] [bsd.gdb] [kernel image] ci-openbsd-multicore uvm_fault: Xsyscall
2026/08/12 11:49 openbsd 2610791609b5 ee03bfea .config console log report [disk image] [bsd.gdb] [kernel image] ci-openbsd-multicore uvm_fault: Xsyscall
2026/08/12 11:26 openbsd 2610791609b5 ee03bfea .config console log report [disk image] [bsd.gdb] [kernel image] ci-openbsd-multicore uvm_fault: Xsyscall
2026/08/12 10:47 openbsd 2610791609b5 ee03bfea .config console log report [disk image] [bsd.gdb] [kernel image] ci-openbsd-multicore uvm_fault: Xsyscall
* Struck through repros no longer work on HEAD.