Re: port-sh3/56401: kernel panic in tmpfs_write

[Martin Husemann <martin%duskware.de@localhost>]

The following reply was made to PR port-sh3/56401; it has been noted by GNATS.

From: Martin Husemann <martin%duskware.de@localhost>
To: gnats-bugs%NetBSD.org@localhost
Cc: 
Subject: Re: port-sh3/56401: kernel panic in tmpfs_write
Date: Tue, 21 Sep 2021 13:34:59 +0200

 With a new kernel the crash now looks like this:
 
 [ 444.4401356] panic: tlb_exception: invalid user-space access from kernel mode
 [ 444.4401356] expevt=40 va=00000000 ssr=400000e0 spc=8c1bcc8c lwp=0x8fa8e640 onfault=0x0
 [ 444.4401356] cpu0: Begin traceback...
 [ 444.4401356] db_panic() at netbsd:vpanic+0xe2
 [ 444.4401356] vpanic() at netbsd:panic+0x18
 [ 444.4401356] panic() at netbsd:tlb_exception+0x27c
 [ 444.4401356] tlb_exception() at 8c0004dc
 [ 444.4401356] <EXPEVT 040; SSR=400000e0> at netbsd:mutex_tryenter+0x4
 [ 444.4401356] [trapframe 0x8c426d00]
 [ 444.4401356]    sr=400000e0   gbr=7abda000    pc=8c1bcc8c     pr=8c1b9642
 [ 444.4401356]    r0=8c1b962c    r1=00000000    r2=00000060     r3=fffffffe
 [ 444.4401356]    r4=00000000    r6=8fa8e640    r7=00000001     r8=8c420364
 [ 444.4401356]    r5=8e909080    r9=00000000   r10=8c1bcbbc    r11=8c1bcc88
 [ 444.4401356]   r12=8fa8e6bc   r13=8e909080   r14=8c426d00 sp=r15=c2de2dc8
 [ 444.4401356] mutex_tryenter() at netbsd:lwp_trylock+0x16
 [ 444.4401356] lwp_trylock() at netbsd:turnstile_block+0x114
 [ 444.4401356] turnstile_block() at netbsd:rw_enter+0xe6
 [ 444.4401356] rw_enter() at netbsd:ubc_alloc.constprop.0+0xb0
 [ 444.4401356] ubc_alloc.constprop.0() at netbsd:ubc_uiomove+0x5c
 [ 444.4401356] ubc_uiomove() at netbsd:tmpfs_write+0xf8
 [ 444.4401356] tmpfs_write() at netbsd:VOP_WRITE+0x1a
 [ 444.4401356] VOP_WRITE() at netbsd:vn_write+0xa0
 [ 444.4401356] vn_write() at netbsd:dofilewrite+0x56
 [ 444.4401356] dofilewrite() at netbsd:sys_write+0x4a
 [ 444.4401356] sys_write() at netbsd:syscall+0xae
 [ 444.4401356] syscall() at 8c0001b2
 [ 444.4401356] <EXPEVT 160; SSR=00000001> at 7a768b14
 [ 444.4401356] [trapframe 0x40aae8]
 [ 444.4401356]    sr=00000001   gbr=7abda000    pc=7a768b14     pr=7a9178a4
 [ 444.4401356]    r0=00000004    r1=ffffe6dc    r2=7a93b178     r3=7a93b13c
 [ 444.4401356]    r4=00000004    r6=7a6b0580    r7=00010000     r8=00000000
 [ 444.4401356]    r5=7ac2ec00    r9=00000344   r10=7a93b140    r11=7a93b180
 [ 444.4401356]   r12=7a931468   r13=7a6b0580   r14=0040aae8 sp=r15=7ffd8a90
 [ 444.4401356] cpu0: End traceback...
 Stopped in pid 1045.1045 (tar) at       netbsd:cpu_Debugger+0x2:        rts
 
 
 Martin