[lkml]   [2022]   [Dec]   [18]   [last100]   RSS Feed
Views: [wrap][no wrap]   [headers]  [forward] 
Messages in this thread
SubjectRe: [syzbot] [gfs2?] general protection fault in gfs2_evict_inode (2)
syzbot has found a reproducer for the following issue on:

HEAD commit: a5541c0811a0 Merge branch 'for-next/core' into for-kernelci
git tree: git:// for-kernelci
console output:
kernel config:
dashboard link:
compiler: Debian clang version 13.0.1-++20220126092033+75e33f71c2da-1~exp1~20220126212112.63, GNU ld (GNU Binutils for Debian) 2.35.2
userspace arch: arm64
syz repro:
C reproducer:

Downloadable assets:
disk image:
kernel image:
mounted in repro:

IMPORTANT: if you fix the issue, please add the following tag to the commit:

gfs2: fsid=syz:syz.0: error recovering journal 0: -5
Unable to handle kernel NULL pointer dereference at virtual address 000000000000008c
Mem abort info:
ESR = 0x0000000096000006
EC = 0x25: DABT (current EL), IL = 32 bits
SET = 0, FnV = 0
EA = 0, S1PTW = 0
FSC = 0x06: level 2 translation fault
Data abort info:
ISV = 0, ISS = 0x00000006
CM = 0, WnR = 0
user pgtable: 4k pages, 48-bit VAs, pgdp=000000010dd7c000
[000000000000008c] pgd=080000010bf77003, p4d=080000010bf77003, pud=080000010a9f1003, pmd=0000000000000000
Internal error: Oops: 0000000096000006 [#1] PREEMPT SMP
Modules linked in:
CPU: 1 PID: 3071 Comm: syz-executor179 Not tainted 6.1.0-rc8-syzkaller-33330-ga5541c0811a0 #0
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 10/26/2022
pstate: 80400005 (Nzcv daif +PAN -UAO -TCO -DIT -SSBS BTYPE=--)
pc : evict_linked_inode fs/gfs2/super.c:1330 [inline]
pc : gfs2_evict_inode+0x6f8/0x918 fs/gfs2/super.c:1385
lr : evict_linked_inode fs/gfs2/super.c:1328 [inline]
lr : gfs2_evict_inode+0x6ec/0x918 fs/gfs2/super.c:1385
sp : ffff80000ff73830
x29: ffff80000ff738a0 x28: 0000000000000000 x27: 0000000000000000
x26: ffff0000cb74c728 x25: 0000000000008004 x24: ffff0000c9b25110
x23: ffff0000cb74c000 x22: ffff0000c9b24e70 x21: ffff0000cb74c000
x20: ffff0000ca579770 x19: ffff0000ca5792c0 x18: 00000000000000c0
x17: ffff80000dda8198 x16: ffff80000dbe6158 x15: ffff0000c407cec0
x14: 00000000000000b8 x13: 00000000ffffffff x12: ffff0000c407cec0
x11: ff80800009278314 x10: 0000000000000000 x9 : ffff800009278314
x8 : 0000000000000000 x7 : ffff80000862aa80 x6 : 0000000000000000
x5 : 0000000000000000 x4 : 0000000000000001 x3 : 0000000000000000
x2 : 0000000000000001 x1 : 0000000000000000 x0 : ffff0000cb74c000
Call trace:
evict_linked_inode fs/gfs2/super.c:1330 [inline]
gfs2_evict_inode+0x6f8/0x918 fs/gfs2/super.c:1385
evict+0xec/0x334 fs/inode.c:664
iput_final fs/inode.c:1747 [inline]
iput+0x2c4/0x324 fs/inode.c:1773
gfs2_jindex_free+0x10c/0x16c fs/gfs2/super.c:75
init_journal+0x518/0xcbc fs/gfs2/ops_fstype.c:871
init_inodes+0x74/0x184 fs/gfs2/ops_fstype.c:889
gfs2_fill_super+0x630/0x874 fs/gfs2/ops_fstype.c:1247
get_tree_bdev+0x1e8/0x2a0 fs/super.c:1324
gfs2_get_tree+0x30/0xc0 fs/gfs2/ops_fstype.c:1330
vfs_get_tree+0x40/0x140 fs/super.c:1531
do_new_mount+0x1dc/0x4e4 fs/namespace.c:3040
path_mount+0x358/0x890 fs/namespace.c:3370
do_mount fs/namespace.c:3383 [inline]
__do_sys_mount fs/namespace.c:3591 [inline]
__se_sys_mount fs/namespace.c:3568 [inline]
__arm64_sys_mount+0x2c4/0x3c4 fs/namespace.c:3568
__invoke_syscall arch/arm64/kernel/syscall.c:38 [inline]
invoke_syscall arch/arm64/kernel/syscall.c:52 [inline]
el0_svc_common+0x138/0x220 arch/arm64/kernel/syscall.c:142
do_el0_svc+0x48/0x140 arch/arm64/kernel/syscall.c:197
el0_svc+0x58/0x150 arch/arm64/kernel/entry-common.c:637
el0t_64_sync_handler+0x84/0xf0 arch/arm64/kernel/entry-common.c:655
el0t_64_sync+0x190/0x194 arch/arm64/kernel/entry.S:584
Code: 97ff3736 f94482e8 aa1703e0 2a1f03e1 (b9408d02)
---[ end trace 0000000000000000 ]---
Code disassembly (best guess):
0: 97ff3736 bl 0xfffffffffffcdcd8
4: f94482e8 ldr x8, [x23, #2304]
8: aa1703e0 mov x0, x23
c: 2a1f03e1 mov w1, wzr
* 10: b9408d02 ldr w2, [x8, #140] <-- trapping instruction

 \ /
  Last update: 2022-12-18 07:04    [W:0.066 / U:0.284 seconds]
©2003-2020 Jasper Spaans|hosted at Digital Ocean and TransIP|Read the blog|Advertise on this site