syzbot


BUG: unable to handle kernel paging request in flush_commit_list

Status: moderation: reported on 2022/12/07 12:30
Reported-by: syzbot+ed7aad657cefce492439@syzkaller.appspotmail.com
First crash: 57d, last: 57d

Sample crash report:
Unable to handle kernel paging request at virtual address ffff800015c2d1f0
Mem abort info:
  ESR = 0x0000000096000007
  EC = 0x25: DABT (current EL), IL = 32 bits
  SET = 0, FnV = 0
  EA = 0, S1PTW = 0
  FSC = 0x07: level 3 translation fault
Data abort info:
  ISV = 0, ISS = 0x00000007
  CM = 0, WnR = 0
swapper pgtable: 4k pages, 48-bit VAs, pgdp=00000001c54dc000
[ffff800015c2d1f0] pgd=100000023ffff003, p4d=100000023ffff003, pud=100000023fffe003, pmd=1000000107766003, pte=0000000000000000
Internal error: Oops: 0000000096000007 [#1] PREEMPT SMP
Modules linked in:
CPU: 0 PID: 17940 Comm: syz-executor.2 Not tainted 6.1.0-rc7-syzkaller-33097-ge3cb714fb489 #0
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 09/30/2022
pstate: 80400005 (Nzcv daif +PAN -UAO -TCO -DIT -SSBS BTYPE=--)
pc : atomic_read include/linux/atomic/atomic-instrumented.h:28 [inline]
pc : flush_older_commits fs/reiserfs/journal.c:900 [inline]
pc : flush_commit_list+0xd4/0xa34 fs/reiserfs/journal.c:997
lr : flush_commit_list+0xb0/0xa34 fs/reiserfs/journal.c:996
sp : ffff800015e9bc90
x29: ffff800015e9bcb0 x28: ffff8000162bd2b8 x27: 0000000000000000
x26: 0000000000000000 x25: 0000000000000001 x24: 0000000000ffff01
x23: 0000000000ffff01 x22: ffff8000162bd000 x21: ffff800015c2d2b8
x20: ffff0001123ea400 x19: ffff000111f89000 x18: 0000000000000000
x17: 0000000000000000 x16: ffff80000dbe6158 x15: ffff0001129a9a40
x14: 0000000000000138 x13: 00000000ffffffff x12: ffff0001129a9a40
x11: ff80800008793e54 x10: 0000000000000000 x9 : ffff0001129a9a40
x8 : ffff8000162bd000 x7 : ffff80000879d2c8 x6 : 0000000000000000
x5 : 0000000000000000 x4 : 0000000000000001 x3 : 0000000000000000
x2 : 0000000000000001 x1 : 0000000000000001 x0 : 0000000000000000
Call trace:
 flush_commit_list+0xd4/0xa34 fs/reiserfs/journal.c:997
 __commit_trans_jl fs/reiserfs/journal.c:3898 [inline]
 reiserfs_commit_for_inode+0x1fc/0x48c fs/reiserfs/journal.c:3922
 reiserfs_dir_fsync+0x78/0xb8 fs/reiserfs/dir.c:43
 vfs_fsync_range fs/sync.c:188 [inline]
 vfs_fsync fs/sync.c:202 [inline]
 do_fsync fs/sync.c:212 [inline]
 __do_sys_fdatasync fs/sync.c:225 [inline]
 __se_sys_fdatasync fs/sync.c:223 [inline]
 __arm64_sys_fdatasync+0x60/0xb8 fs/sync.c:223
 __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: 910ae11c eb1c02bf 540009a0 b940ba97 (b85382b9) 
---[ end trace 0000000000000000 ]---
----------------
Code disassembly (best guess):
   0:	910ae11c 	add	x28, x8, #0x2b8
   4:	eb1c02bf 	cmp	x21, x28
   8:	540009a0 	b.eq	0x13c  // b.none
   c:	b940ba97 	ldr	w23, [x20, #184]
* 10:	b85382b9 	ldur	w25, [x21, #-200] <-- trapping instruction

Crashes (1):
Manager Time Kernel Commit Syzkaller Config Log Report Syz repro C repro VM info Assets Title
ci-upstream-gce-arm64 2022/12/03 12:24 git://git.kernel.org/pub/scm/linux/kernel/git/arm64/linux.git for-kernelci e3cb714fb489 e080de16 .config console log report info [disk image] [vmlinux] [kernel image] BUG: unable to handle kernel paging request in flush_commit_list
* Struck through repros no longer work on HEAD.