syzbot


panic: ffs_blkfree: bad size (5)

Status: upstream: reported on 2025/02/07 23:36
Reported-by: syzbot+b40369be6e372e79ea33@syzkaller.appspotmail.com
First crash: 48d, last: 19d
Similar bugs (4)
Kernel Title Repro Cause bisect Fix bisect Count Last Reported Patched Status
openbsd panic: ffs_blkfree: bad size (3) 1 440d 440d 0/3 auto-obsoleted due to no activity on 2024/04/11 20:56
openbsd panic: ffs_blkfree: bad size (4) 5 223d 322d 0/3 auto-obsoleted due to no activity on 2024/11/14 17:32
openbsd panic: ffs_blkfree: bad size 2 2094d 2098d 0/3 auto-closed as invalid on 2019/10/25 14:12
openbsd panic: ffs_blkfree: bad size (2) 1 545d 545d 0/3 auto-obsoleted due to no activity on 2023/12/28 07:11

Sample crash report:
panic: ffs_blkfree: bad size
Starting stack trace...
panic(ffffffff8334a213) at panic+0x1d0 sys/kern/subr_prf.c:229
ffs_blkfree(fffffd806bc337a8,2b32ea4b,4000) at ffs_blkfree+0xd33 sys/ufs/ffs/ffs_alloc.c:1285
ffs_truncate(fffffd806bc337a8,0,4,fffffd807f7d2410) at ffs_truncate+0x1174 sys/ufs/ffs/ffs_inode.c:304
ufs_rmdir(ffff80002a360a58) at ufs_rmdir+0x377 sys/ufs/ufs/ufs_vnops.c:1265
VOP_RMDIR(fffffd8077b5c1c0,fffffd8076bf4478,ffff80002a360b38) at VOP_RMDIR+0x19a sys/kern/vfs_vops.c:413
dounlinkat(ffff
8000ffff54a8,ffffff9c,7af45aebb3a0,8) at dounlinkat+0x2e0 sys/kern/vfs_syscalls.c:1899
syscall(ffff80002a360cb0) at syscall+0xb08 mi_syscall sys/sys/syscall_mi.h:176 [inline]
syscall(ffff80002a360cb0) at syscall+0xb08 sys/arch/amd64/amd64/trap.c:577
Xsyscall() at Xsyscall+0x128
end of kernel
end trace frame: 0x7af45aebb390, count: 249
End of stack trace.
syncing disks...set $lines = 0
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Crashes (8):
Time Kernel Commit Syzkaller Config Log Report Syz repro C repro VM info Assets (help?) Manager Title
2025/03/08 15:13 openbsd aa707e2a580f 7e3bd60d .config console log report [disk image] [bsd.gdb] [kernel image] ci-openbsd-multicore panic: ffs_blkfree: bad size
2025/03/04 03:26 openbsd 4602d4e06be3 c3901742 .config console log report [disk image] [bsd.gdb] [kernel image] ci-openbsd-main panic: ffs_blkfree: bad size
2025/03/03 23:27 openbsd 4602d4e06be3 c3901742 .config console log report [disk image] [bsd.gdb] [kernel image] ci-openbsd-main panic: ffs_blkfree: bad size
2025/03/02 01:20 openbsd 9c635e83c4be c3901742 .config console log report [disk image] [bsd.gdb] [kernel image] ci-openbsd-main panic: ffs_blkfree: bad size
2025/02/20 20:22 openbsd e17cfef6a95f 0808a665 .config console log report [disk image] [bsd.gdb] [kernel image] ci-openbsd-main panic: ffs_blkfree: bad size
2025/02/12 16:04 openbsd 705b70e045d6 b27c2402 .config console log report [disk image] [bsd.gdb] [kernel image] ci-openbsd-main panic: ffs_blkfree: bad size
2025/02/10 08:19 openbsd 275cd30cffcd ef44b750 .config console log report [disk image] [bsd.gdb] [kernel image] ci-openbsd-main panic: ffs_blkfree: bad size
2025/02/07 23:35 openbsd a57a16499ccf ef44b750 .config console log report [disk image] [bsd.gdb] [kernel image] ci-openbsd-main panic: ffs_blkfree: bad size
* Struck through repros no longer work on HEAD.