syzbot


netbsd test error: MSan: Uninitialized Memory in fpu_clear

Status: upstream: reported on 2025/04/27 07:48
Reported-by: syzbot+8678c88535f9ce1f5ffe@syzkaller.appspotmail.com
First crash: 104d, last: 2d12h

Sample crash report:
[   6.3225619] panic: MSan: Uninitialized Pool Memory From fork1()

[   6.3225619] cpu0: Begin traceback...
[   6.3425546] vpanic() at netbsd:vpanic+0xc9d sys/kern/subr_prf.c:-1
[   6.3625505] panic() at netbsd:panic+0x1b3
[   6.3925504] __msan_warning() at netbsd:__msan_warning+0x11e kmsan_report_inline sys/kern/subr_msan.c:250 [inline]
[   6.3925504] __msan_warning() at netbsd:__msan_warning+0x11e sys/kern/subr_msan.c:631
[   6.4225513] fpu_clear() at netbsd:fpu_clear+0x86b sys/arch/x86/x86/fpu.c:-1
[   6.4525510] setregs() at netbsd:setregs+0x142 sys/arch/amd64/amd64/machdep.c:1382
[   6.4825586] execve_runproc() at netbsd:execve_runproc+0x46b1 sys/kern/kern_exec.c:1202
[   6.5125550] sys_execve() at netbsd:sys_execve+0x264 execve1 sys/kern/kern_exec.c:1479 [inline]
[   6.5125550] sys_execve() at netbsd:sys_execve+0x264 sys/kern/kern_exec.c:608
[   6.5425556] start_init() at netbsd:start_init+0x13b6 sys/kern/init_main.c:1128
[   6.5533935] cpu0: End traceback...
[   6.5652633] fatal breakpoint trap in supervisor mode
[   6.5652633] trap type 1 code 0 rip 0xffffffff80236885 cs 0x8 rflags 0x282 cr2 0x7f7fff36a820 ilevel 0x5 rsp 0xffffdc80bf6b04d0
[   6.5814187] curlwp 0xffffdc8011e38100 pid 1.1 lowest kstack 0xffffdc80bf6a92c0
Stopped in pid 1.1 (init) at    netbsd:breakpoint+0x5:  leave
breakpoint() at netbsd:breakpoint+0x5
vpanic() at netbsd:vpanic+0xc9d sys/kern/subr_prf.c:-1
panic() at netbsd:panic+0x1b3
__msan_warning() at netbsd:__msan_warning+0x11e kmsan_report_inline sys/kern/subr_msan.c:250 [inline]
__msan_warning() at netbsd:__msan_warning+0x11e sys/kern/subr_msan.c:631
fpu_clear() at netbsd:fpu_clear+0x86b sys/arch/x86/x86/fpu.c:-1
setregs() at netbsd:setregs+0x142 sys/arch/amd64/amd64/machdep.c:1382
execve_runproc() at netbsd:execve_runproc+0x46b1 sys/kern/kern_exec.c:1202
sys_execve() at netbsd:sys_execve+0x264 execve1 sys/kern/kern_exec.c:1479 [inline]
sys_execve() at netbsd:sys_execve+0x264 sys/kern/kern_exec.c:608
start_init() at netbsd:start_init+0x13b6 sys/kern/init_main.c:1128
ds          6918
es          7e33
fs          4c0
gs          0
rdi         5
rsi         0
rbp         ffffdc80bf6b04d0
rbx         0
rdx         1
rcx         ffffdc8011e38100
rax         ffffdc8012016918
r8          0
r9          500000000000000
--db_more--

Crashes (442):
Time Kernel Commit Syzkaller Config Log Report Syz repro C repro VM info Assets (help?) Manager Title
2025/08/07 04:32 netbsd 29beb637d057 9a42d6b1 .config console log report [disk image] [netbsd.gdb] ci2-netbsd-kmsan netbsd test error: MSan: Uninitialized Memory in fpu_clear
2025/08/06 23:49 netbsd 390025372020 9a42d6b1 .config console log report [disk image] [netbsd.gdb] ci2-netbsd-kmsan netbsd test error: MSan: Uninitialized Memory in fpu_clear
2025/08/06 21:46 netbsd 390025372020 ffe1dd46 .config console log report [disk image] [netbsd.gdb] ci2-netbsd-kmsan netbsd test error: MSan: Uninitialized Memory in fpu_clear
2025/08/06 14:51 netbsd 3e58fb2cc7f3 ffe1dd46 .config console log report [disk image] [netbsd.gdb] ci2-netbsd-kmsan netbsd test error: MSan: Uninitialized Memory in fpu_clear
2025/08/06 09:45 netbsd 6b0088d1e67d ffe1dd46 .config console log report [disk image] [netbsd.gdb] ci2-netbsd-kmsan netbsd test error: MSan: Uninitialized Memory in fpu_clear
2025/08/06 06:34 netbsd fbc738f7c1fa ffe1dd46 .config console log report [disk image] [netbsd.gdb] ci2-netbsd-kmsan netbsd test error: MSan: Uninitialized Memory in fpu_clear
2025/08/06 04:05 netbsd 6e3bad1587cf ffe1dd46 .config console log report [disk image] [netbsd.gdb] ci2-netbsd-kmsan netbsd test error: MSan: Uninitialized Memory in fpu_clear
2025/08/05 23:21 netbsd 50e3b366a338 ffe1dd46 .config console log report [disk image] [netbsd.gdb] ci2-netbsd-kmsan netbsd test error: MSan: Uninitialized Memory in fpu_clear
2025/08/05 21:36 netbsd 50e3b366a338 37880f40 .config console log report [disk image] [netbsd.gdb] ci2-netbsd-kmsan netbsd test error: MSan: Uninitialized Memory in fpu_clear
2025/08/05 18:42 netbsd 56f56e90322c 37880f40 .config console log report [disk image] [netbsd.gdb] ci2-netbsd-kmsan netbsd test error: MSan: Uninitialized Memory in fpu_clear
2025/08/05 14:58 netbsd 8ba61392d779 37880f40 .config console log report [disk image] [netbsd.gdb] ci2-netbsd-kmsan netbsd test error: MSan: Uninitialized Memory in fpu_clear
2025/08/05 12:46 netbsd c219601b0b0f 37880f40 .config console log report [disk image] [netbsd.gdb] ci2-netbsd-kmsan netbsd test error: MSan: Uninitialized Memory in fpu_clear
2025/08/05 11:42 netbsd 03c04bb1e1d2 37880f40 .config console log report [disk image] [netbsd.gdb] ci2-netbsd-kmsan netbsd test error: MSan: Uninitialized Memory in fpu_clear
2025/08/05 07:38 netbsd 03c04bb1e1d2 f5bcc8dc .config console log report [disk image] [netbsd.gdb] ci2-netbsd-kmsan netbsd test error: MSan: Uninitialized Memory in fpu_clear
2025/08/05 02:32 netbsd cb72665c125a f5bcc8dc .config console log report [disk image] [netbsd.gdb] ci2-netbsd-kmsan netbsd test error: MSan: Uninitialized Memory in fpu_clear
2025/08/05 00:26 netbsd 4a373b88a92b f5bcc8dc .config console log report [disk image] [netbsd.gdb] ci2-netbsd-kmsan netbsd test error: MSan: Uninitialized Memory in fpu_clear
2025/08/04 21:33 netbsd bd32bd538b40 f5bcc8dc .config console log report [disk image] [netbsd.gdb] ci2-netbsd-kmsan netbsd test error: MSan: Uninitialized Memory in fpu_clear
2025/08/04 18:54 netbsd 81fba5bcb689 f5bcc8dc .config console log report [disk image] [netbsd.gdb] ci2-netbsd-kmsan netbsd test error: MSan: Uninitialized Memory in fpu_clear
2025/08/04 15:43 netbsd 81fba5bcb689 7368264b .config console log report [disk image] [netbsd.gdb] ci2-netbsd-kmsan netbsd test error: MSan: Uninitialized Memory in fpu_clear
2025/08/04 07:38 netbsd a31ffb715605 7368264b .config console log report [disk image] [netbsd.gdb] ci2-netbsd-kmsan netbsd test error: MSan: Uninitialized Memory in fpu_clear
2025/08/04 01:30 netbsd 33cb7201b317 7368264b .config console log report [disk image] [netbsd.gdb] ci2-netbsd-kmsan netbsd test error: MSan: Uninitialized Memory in fpu_clear
2025/08/03 12:13 netbsd aa8b5f602ef9 7368264b .config console log report [disk image] [netbsd.gdb] ci2-netbsd-kmsan netbsd test error: MSan: Uninitialized Memory in fpu_clear
2025/08/03 02:43 netbsd fcd96f7d78eb 7368264b .config console log report [disk image] [netbsd.gdb] ci2-netbsd-kmsan netbsd test error: MSan: Uninitialized Memory in fpu_clear
2025/08/02 19:51 netbsd 143fe4c48894 7368264b .config console log report [disk image] [netbsd.gdb] ci2-netbsd-kmsan netbsd test error: MSan: Uninitialized Memory in fpu_clear
2025/08/02 10:52 netbsd 5fd7c111dc00 7368264b .config console log report [disk image] [netbsd.gdb] ci2-netbsd-kmsan netbsd test error: MSan: Uninitialized Memory in fpu_clear
2025/08/02 01:10 netbsd 74fb51088b5e 7368264b .config console log report [disk image] [netbsd.gdb] ci2-netbsd-kmsan netbsd test error: MSan: Uninitialized Memory in fpu_clear
2025/08/01 21:27 netbsd 74fb51088b5e 40127d41 .config console log report [disk image] [netbsd.gdb] ci2-netbsd-kmsan netbsd test error: MSan: Uninitialized Memory in fpu_clear
2025/08/01 12:25 netbsd 0b011669be2b 40127d41 .config console log report [disk image] [netbsd.gdb] ci2-netbsd-kmsan netbsd test error: MSan: Uninitialized Memory in fpu_clear
2025/08/01 00:24 netbsd 0b011669be2b 0c075d67 .config console log report [disk image] [netbsd.gdb] ci2-netbsd-kmsan netbsd test error: MSan: Uninitialized Memory in fpu_clear
2025/07/31 21:49 netbsd 28b2f580b09a 0c075d67 .config console log report [disk image] [netbsd.gdb] ci2-netbsd-kmsan netbsd test error: MSan: Uninitialized Memory in fpu_clear
2025/07/31 17:08 netbsd ef5752eaac1a 0c075d67 .config console log report [disk image] [netbsd.gdb] ci2-netbsd-kmsan netbsd test error: MSan: Uninitialized Memory in fpu_clear
2025/07/31 08:51 netbsd ef5752eaac1a f8f2b4da .config console log report [disk image] [netbsd.gdb] ci2-netbsd-kmsan netbsd test error: MSan: Uninitialized Memory in fpu_clear
2025/07/31 05:38 netbsd 0fc50dd51b2c f8f2b4da .config console log report [disk image] [netbsd.gdb] ci2-netbsd-kmsan netbsd test error: MSan: Uninitialized Memory in fpu_clear
2025/07/31 00:07 netbsd 658910e56bce f8f2b4da .config console log report [disk image] [netbsd.gdb] ci2-netbsd-kmsan netbsd test error: MSan: Uninitialized Memory in fpu_clear
2025/07/30 17:37 netbsd 761d14f29a91 f8f2b4da .config console log report [disk image] [netbsd.gdb] ci2-netbsd-kmsan netbsd test error: MSan: Uninitialized Memory in fpu_clear
2025/07/29 21:26 netbsd 73ee3e45f2a0 f8f2b4da .config console log report [disk image] [netbsd.gdb] ci2-netbsd-kmsan netbsd test error: MSan: Uninitialized Memory in fpu_clear
2025/07/29 07:08 netbsd 73ee3e45f2a0 c4a95487 .config console log report [disk image] [netbsd.gdb] ci2-netbsd-kmsan netbsd test error: MSan: Uninitialized Memory in fpu_clear
2025/07/29 01:46 netbsd 73ee3e45f2a0 6654ea9c .config console log report [disk image] [netbsd.gdb] ci2-netbsd-kmsan netbsd test error: MSan: Uninitialized Memory in fpu_clear
2025/07/28 16:41 netbsd d58c750ef538 6654ea9c .config console log report [disk image] [netbsd.gdb] ci2-netbsd-kmsan netbsd test error: MSan: Uninitialized Memory in fpu_clear
2025/07/28 15:31 netbsd 96882cabddf9 6654ea9c .config console log report [disk image] [netbsd.gdb] ci2-netbsd-kmsan netbsd test error: MSan: Uninitialized Memory in fpu_clear
2025/07/28 07:08 netbsd 96882cabddf9 fb8f743d .config console log report [disk image] [netbsd.gdb] ci2-netbsd-kmsan netbsd test error: MSan: Uninitialized Memory in fpu_clear
2025/07/28 01:03 netbsd c7e20e5f38c6 fb8f743d .config console log report [disk image] [netbsd.gdb] ci2-netbsd-kmsan netbsd test error: MSan: Uninitialized Memory in fpu_clear
2025/07/27 22:04 netbsd e5658a9a1ce6 fb8f743d .config console log report [disk image] [netbsd.gdb] ci2-netbsd-kmsan netbsd test error: MSan: Uninitialized Memory in fpu_clear
2025/04/27 07:48 netbsd 79e1e9de4198 c6b4fb39 .config console log report [disk image] [netbsd.gdb] ci2-netbsd-kmsan netbsd test error: MSan: Uninitialized Memory in fpu_clear
* Struck through repros no longer work on HEAD.