Hello, syzbot found the following issue on: HEAD commit: 09a9639e56c0 Linux 6.3-rc6 git tree: upstream console output: https://syzkaller.appspot.com/x/log.txt?x=12ad32adc80000 kernel config: https://syzkaller.appspot.com/x/.config?x=c21559e740385326 dashboard link: https://syzkaller.appspot.com/bug?extid=f91110fac7f22eb6284f compiler: gcc (Debian 10.2.1-6) 10.2.1 20210110, GNU ld (GNU Binutils for Debian) 2.35.2 Unfortunately, I don't have any reproducer for this issue yet. Downloadable assets: disk image: https://storage.googleapis.com/syzbot-assets/723a785e56e6/disk-09a9639e.raw.xz vmlinux: https://storage.googleapis.com/syzbot-assets/140da8057460/vmlinux-09a9639e.xz kernel image: https://storage.googleapis.com/syzbot-assets/d73b2f2c297c/bzImage-09a9639e.xz IMPORTANT: if you fix the issue, please add the following tag to the commit: Reported-by: syzbot+f91110fac7f22eb6284f@xxxxxxxxxxxxxxxxxxxxxxxxx ================================================================== BUG: KASAN: null-ptr-deref in instrument_atomic_read include/linux/instrumented.h:72 [inline] BUG: KASAN: null-ptr-deref in _test_bit_acquire include/asm-generic/bitops/instrumented-non-atomic.h:153 [inline] BUG: KASAN: null-ptr-deref in wait_on_bit_io include/linux/wait_bit.h:99 [inline] BUG: KASAN: null-ptr-deref in __wait_on_buffer+0x31/0x70 fs/buffer.c:123 Read of size 8 at addr 0000000000000000 by task syz-executor.2/5538 CPU: 1 PID: 5538 Comm: syz-executor.2 Not tainted 6.3.0-rc6-syzkaller #0 Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 03/30/2023 Call Trace: <TASK> __dump_stack lib/dump_stack.c:88 [inline] dump_stack_lvl+0xd9/0x150 lib/dump_stack.c:106 print_report mm/kasan/report.c:433 [inline] kasan_report+0xec/0x130 mm/kasan/report.c:536 check_region_inline mm/kasan/generic.c:181 [inline] kasan_check_range+0x141/0x190 mm/kasan/generic.c:187 instrument_atomic_read include/linux/instrumented.h:72 [inline] _test_bit_acquire include/asm-generic/bitops/instrumented-non-atomic.h:153 [inline] wait_on_bit_io include/linux/wait_bit.h:99 [inline] __wait_on_buffer+0x31/0x70 fs/buffer.c:123 flush_commit_list.isra.0+0xdd6/0x1e70 fs/reiserfs/journal.c:1072 do_journal_end+0x3714/0x4af0 fs/reiserfs/journal.c:4302 do_journal_release fs/reiserfs/journal.c:1917 [inline] journal_release+0x149/0x630 fs/reiserfs/journal.c:1971 reiserfs_put_super+0xe4/0x5c0 fs/reiserfs/super.c:616 generic_shutdown_super+0x158/0x480 fs/super.c:500 kill_block_super+0x9b/0xf0 fs/super.c:1407 deactivate_locked_super+0x98/0x160 fs/super.c:331 deactivate_super+0xb1/0xd0 fs/super.c:362 cleanup_mnt+0x2ae/0x3d0 fs/namespace.c:1177 task_work_run+0x16f/0x270 kernel/task_work.c:179 exit_task_work include/linux/task_work.h:38 [inline] do_exit+0xad3/0x2960 kernel/exit.c:869 __do_sys_exit kernel/exit.c:986 [inline] __se_sys_exit kernel/exit.c:984 [inline] __x64_sys_exit+0x42/0x50 kernel/exit.c:984 do_syscall_x64 arch/x86/entry/common.c:50 [inline] do_syscall_64+0x39/0xb0 arch/x86/entry/common.c:80 entry_SYSCALL_64_after_hwframe+0x63/0xcd RIP: 0033:0x7fee0e88c169 Code: Unable to access opcode bytes at 0x7fee0e88c13f. RSP: 002b:00007fee0f592118 EFLAGS: 00000246 ORIG_RAX: 000000000000003c RAX: ffffffffffffffda RBX: 00007fee0e9abf80 RCX: 00007fee0e88c169 RDX: 0000000000000000 RSI: 0000000000000000 RDI: 0000000000000000 RBP: 00007fee0e8e7ca1 R08: 0000000000000000 R09: 0000000000000000 R10: 0000000000000000 R11: 0000000000000246 R12: 0000000000000000 R13: 00007ffc0cf63b9f R14: 00007fee0f592300 R15: 0000000000022000 </TASK> ================================================================== --- This report is generated by a bot. It may contain errors. See https://goo.gl/tpsmEJ for more information about syzbot. syzbot engineers can be reached at syzkaller@xxxxxxxxxxxxxxxx. syzbot will keep track of this issue. See: https://goo.gl/tpsmEJ#status for how to communicate with syzbot.
