[Bug 135690] [panic] [ata] ufs_dirbad: /backuphd: bad dir ino 22259126 at offset 0: mangled entry

https://bugs.freebsd.org/bugzilla/show_bug.cgi?id=135690

Karel Gardas <karel.gardas@centrum.cz> changed:

           What    |Removed                     |Added
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                 CC|                            |karel.gardas@centrum.cz

--- Comment #7 from Karel Gardas <karel.gardas@centrum.cz> ---
Not sure if I may report here too, but I'm able to see the same panic quite
reguralry on RISC-V platform with latest FreeBSD VM image and while running in
qemu 5.2.0 on top of FreeBSD 13-p5 on x64 host.

My panic looks:
FreeBSD/riscv (freebsd) (ttyu0)                                                 

login: panic: ufs_dirbad: /: bad dir ino 739685 at offset 0: mangled entry
cpuid = 3
time = 1637242167
KDB: stack backtrace:
db_trace_self() at db_trace_self
db_trace_self_wrapper() at db_trace_self_wrapper+0x38
kdb_backtrace() at kdb_backtrace+0x2c
vpanic() at vpanic+0x148
panic() at panic+0x2a
ufs_lookup_ino() at ufs_lookup_ino+0xb18
ufs_lookup() at ufs_lookup+0x16
VOP_CACHEDLOOKUP_APV() at VOP_CACHEDLOOKUP_APV+0x30
vfs_cache_lookup() at vfs_cache_lookup+0xae
VOP_LOOKUP_APV() at VOP_LOOKUP_APV+0x30
lookup() at lookup+0x45e
namei() at namei+0x35c
kern_statat() at kern_statat+0xe8
sys_fstatat() at sys_fstatat+0x1e
do_trap_user() at do_trap_user+0x208
cpu_exception_handler_user() at cpu_exception_handler_user+0x72
--- exception 8, tval = 0
KDB: enter: panic
[ thread pid 779 tid 100087 ]
Stopped at      kdb_enter+0x4c: sd      zero,0(a0)
db> where
Tracing pid 779 tid 100087 td 0xffffffc0957c7100
kdb_enter() at kdb_enter+0x4a
vpanic() at vpanic+0x18c
panic() at panic+0x2a
ufs_lookup_ino() at ufs_lookup_ino+0xb18
ufs_lookup() at ufs_lookup+0x16
VOP_CACHEDLOOKUP_APV() at VOP_CACHEDLOOKUP_APV+0x30
vfs_cache_lookup() at vfs_cache_lookup+0xae
VOP_LOOKUP_APV() at VOP_LOOKUP_APV+0x30
vfs_cache_lookup() at vfs_cache_lookup+0xae
VOP_LOOKUP_APV() at VOP_LOOKUP_APV+0x30
lookup() at lookup+0x45e
namei() at namei+0x35c
kern_statat() at kern_statat+0xe8
sys_fstatat() at sys_fstatat+0x1e
do_trap_user() at do_trap_user+0x208
cpu_exception_handler_user() at cpu_exception_handler_user+0x72
--- exception 8, tval = 0

db>

and it usually happen after some time of using risc-v vm. When using it I
usually do:
- pkg install git
- git clone latest src
- buildworld
- buildkernel

sometimes I'm not able to complete, sometimes I'm and the panic happen more
later.

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