Hello,
syzbot found the following issue on:
HEAD commit: 2475bf0250de Merge tag 'sched_urgent_for_v6.2_rc6' of git:..
git tree: upstream
console output:
https://syzkaller.appspot.com/x/log.txt?x=10f837b6480000
kernel config:
https://syzkaller.appspot.com/x/.config?x=c5d89b670f0458d
dashboard link:
https://syzkaller.appspot.com/bug?extid=eb2cefea50bed497d7ca
compiler: Debian clang version 13.0.1-++20220126092033+75e33f71c2da-1~exp1~20220126212112.63, GNU ld (GNU Binutils for Debian) 2.35.2
CC: [
ja...@suse.com linux-...@vger.kernel.org]
Unfortunately, I don't have any reproducer for this issue yet.
Downloadable assets:
disk image:
https://storage.googleapis.com/syzbot-assets/5d5e719ff27e/disk-2475bf02.raw.xz
vmlinux:
https://storage.googleapis.com/syzbot-assets/8f25c227250b/vmlinux-2475bf02.xz
kernel image:
https://storage.googleapis.com/syzbot-assets/ca051d2a3e77/bzImage-2475bf02.xz
IMPORTANT: if you fix the issue, please add the following tag to the commit:
Reported-by:
syzbot+eb2cef...@syzkaller.appspotmail.com
==================================================================
BUG: KASAN: null-ptr-deref in instrument_atomic_read_write include/linux/instrumented.h:102 [inline]
BUG: KASAN: null-ptr-deref in test_and_set_bit_lock include/asm-generic/bitops/instrumented-lock.h:57 [inline]
BUG: KASAN: null-ptr-deref in trylock_buffer include/linux/buffer_head.h:390 [inline]
BUG: KASAN: null-ptr-deref in lock_buffer include/linux/buffer_head.h:396 [inline]
BUG: KASAN: null-ptr-deref in udf_getblk fs/udf/inode.c:469 [inline]
BUG: KASAN: null-ptr-deref in udf_bread+0x2e9/0x510 fs/udf/inode.c:1195
Write of size 8 at addr 0000000000000000 by task syz-executor.5/29768
CPU: 1 PID: 29768 Comm: syz-executor.5 Not tainted 6.2.0-rc5-syzkaller-00013-g2475bf0250de #0
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/12/2023
Call Trace:
<TASK>
__dump_stack lib/dump_stack.c:88 [inline]
dump_stack_lvl+0x1b1/0x290 lib/dump_stack.c:106
print_report+0xed/0x1f0 mm/kasan/report.c:420
kasan_report+0xcd/0x100 mm/kasan/report.c:517
kasan_check_range+0x2a7/0x2e0 mm/kasan/generic.c:189
instrument_atomic_read_write include/linux/instrumented.h:102 [inline]
test_and_set_bit_lock include/asm-generic/bitops/instrumented-lock.h:57 [inline]
trylock_buffer include/linux/buffer_head.h:390 [inline]
lock_buffer include/linux/buffer_head.h:396 [inline]
udf_getblk fs/udf/inode.c:469 [inline]
udf_bread+0x2e9/0x510 fs/udf/inode.c:1195
udf_add_entry+0x1c97/0x3300 fs/udf/namei.c:495
udf_add_nondir+0xfc/0x580 fs/udf/namei.c:588
lookup_open fs/namei.c:3413 [inline]
open_last_lookups fs/namei.c:3481 [inline]
path_openat+0x12ac/0x2dd0 fs/namei.c:3711
do_filp_open+0x264/0x4f0 fs/namei.c:3741
do_sys_openat2+0x124/0x4e0 fs/open.c:1310
do_sys_open fs/open.c:1326 [inline]
__do_sys_creat fs/open.c:1402 [inline]
__se_sys_creat fs/open.c:1396 [inline]
__x64_sys_creat+0x11f/0x160 fs/open.c:1396
do_syscall_x64 arch/x86/entry/common.c:50 [inline]
do_syscall_64+0x3d/0xb0 arch/x86/entry/common.c:80
entry_SYSCALL_64_after_hwframe+0x63/0xcd
RIP: 0033:0x7fb8d108c0c9
Code: 28 00 00 00 75 05 48 83 c4 28 c3 e8 f1 19 00 00 90 48 89 f8 48 89 f7 48 89 d6 48 89 ca 4d 89 c2 4d 89 c8 4c 8b 4c 24 08 0f 05 <48> 3d 01 f0 ff ff 73 01 c3 48 c7 c1 b8 ff ff ff f7 d8 64 89 01 48
RSP: 002b:00007fb8d1dee168 EFLAGS: 00000246 ORIG_RAX: 0000000000000055
RAX: ffffffffffffffda RBX: 00007fb8d11ac120 RCX: 00007fb8d108c0c9
RDX: 0000000000000000 RSI: 0000000000000000 RDI: 0000000020000180
RBP: 00007fb8d10e7ae9 R08: 0000000000000000 R09: 0000000000000000
R10: 0000000000000000 R11: 0000000000000246 R12: 0000000000000000
R13: 00007ffcb37f07cf R14: 00007fb8d1dee300 R15: 0000000000022000
</TASK>
==================================================================
---
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