syzbot


netbsd boot error: panic: cpu0: softints stuck for NUM seconds (2)

Status: upstream: reported on 2024/04/22 04:40
Reported-by: syzbot+6409a7651c570d4f3d22@syzkaller.appspotmail.com
First crash: 34d, last: 29d
Similar bugs (1)
Kernel Title Repro Cause bisect Fix bisect Count Last Reported Patched Status
netbsd netbsd boot error: panic: cpu0: softints stuck for NUM seconds 1 279d 279d 0/3 auto-obsoleted due to no activity on 2023/11/19 19:42

Sample crash report:
[  24.0004268] panic: cpu0: softints stuck for 16 seconds
[  24.0004268] cpu0: Begin traceback...
[  24.0004268] vpanic() at netbsd:vpanic+0x2f0 sys/kern/subr_prf.c:288
[  24.0004268] panic() at netbsd:panic+0x49 sys/kern/subr_prf.c:1116
[  24.0004268] heartbeat() at netbsd:heartbeat+0x7c3 select_patient sys/kern/kern_heartbeat.c:549 [inline]
[  24.0004268] heartbeat() at netbsd:heartbeat+0x7c3 sys/kern/kern_heartbeat.c:706
[  24.0004268] hardclock() at netbsd:hardclock+0x1d9 sys/kern/kern_clock.c:348
[  24.0004268] Xresume_lapic_ltimer() at netbsd:Xresume_lapic_ltimer+0x1e
[  24.0004268] --- interrupt ---
[  24.0004268] __sanitizer_cov_trace_const_cmp1() at netbsd:__sanitizer_cov_trace_const_cmp1+0x4a trace_cmp sys/kern/subr_kcov.c:636 [inline]
[  24.0004268] __sanitizer_cov_trace_const_cmp1() at netbsd:__sanitizer_cov_trace_const_cmp1+0x4a sys/kern/subr_kcov.c:719
[  24.0004268] _kernel_lock() at netbsd:_kernel_lock+0x482 sys/kern/kern_lock.c:268
[  24.0004268] frag6_fasttimo() at netbsd:frag6_fasttimo+0x24 sys/netinet6/frag6.c:662
[  24.0004268] pffasttimo() at netbsd:pffasttimo+0xc6 sys/kern/uipc_domain.c:770
[  24.0004268] callout_softclock() at netbsd:callout_softclock+0x2ab sys/kern/kern_timeout.c:873
[  24.0004268] softint_dispatch() at netbsd:softint_dispatch+0x40a softint_execute sys/kern/kern_softint.c:605 [inline]
[  24.0004268] softint_dispatch() at netbsd:softint_dispatch+0x40a sys/kern/kern_softint.c:848
[  24.0004268] DDB lost frame for netbsd:Xsoftintr+0x4c, trying 0xffffc8822fa320f0
[  24.0004268] Xsoftintr() at netbsd:Xsoftintr+0x4c
[  24.0004268] --- interrupt ---
[  24.0004268] 0:
[  24.0004268] cpu0: End traceback...
[  24.0004268] fatal breakpoint trap in supervisor mode
[  24.0004268] trap type 1 code 0 rip 0xffffffff80235475 cs 0x8 rflags 0x246 cr2 0 ilevel 0x7 rsp 0xffffc8822fa31bc8
[  24.0004268] curlwp 0xfffffde2fbfc2080 pid 0.5 lowest kstack 0xffffc8822fa2d2c0
Stopped in pid 0.5 (system) at  netbsd:breakpoint+0x5:  leave
breakpoint() at netbsd:breakpoint+0x5
db_panic() at netbsd:db_panic+0xec sys/ddb/db_panic.c:71
vpanic() at netbsd:vpanic+0x2f0 sys/kern/subr_prf.c:288
panic() at netbsd:panic+0x49 sys/kern/subr_prf.c:1116
heartbeat() at netbsd:heartbeat+0x7c3 select_patient sys/kern/kern_heartbeat.c:549 [inline]
heartbeat() at netbsd:heartbeat+0x7c3 sys/kern/kern_heartbeat.c:706
hardclock() at netbsd:hardclock+0x1d9 sys/kern/kern_clock.c:348
Xresume_lapic_ltimer() at netbsd:Xresume_lapic_ltimer+0x1e
--- interrupt ---
__sanitizer_cov_trace_const_cmp1() at netbsd:__sanitizer_cov_trace_const_cmp1+0x
4a
_kernel_lock() at netbsd:_kernel_lock+0x482 sys/kern/kern_lock.c:268
frag6_fasttimo() at netbsd:frag6_fasttimo+0x24 sys/netinet6/frag6.c:662
pffasttimo() at netbsd:pffasttimo+0xc6 sys/kern/uipc_domain.c:770
callout_softclock() at netbsd:callout_softclock+0x2ab sys/kern/kern_timeout.c:873
softint_dispatch() at netbsd:softint_dispatch+0x40a softint_execute sys/kern/kern_softint.c:605 [inline]
softint_dispatch() at netbsd:softint_dispatch+0x40a sys/kern/kern_softint.c:848
DDB lost frame for netbsd:Xsoftintr+0x4c, trying 0xffffc8822fa320f0
Xsoftintr() at netbsd:Xsoftintr+0x4c
--- interrupt ---
0:
ds          1b88
es          1bd8
fs          10
--db_more--

Crashes (2):
Time Kernel Commit Syzkaller Config Log Report Syz repro C repro VM info Assets (help?) Manager Title
2024/04/27 16:47 netbsd 96381692fecd 07b455f9 .config console log report [disk image] [netbsd.gdb] ci2-netbsd-kubsan netbsd boot error: panic: cpu0: softints stuck for NUM seconds
2024/04/22 04:40 netbsd 9799297d00f4 af24b050 .config console log report [disk image] [netbsd.gdb] ci2-netbsd-kubsan netbsd boot error: panic: cpu0: softints stuck for NUM seconds
* Struck through repros no longer work on HEAD.