Hello, syzbot found the following issue on: HEAD commit: 620725263f42 Merge tag 'mm-hotfixes-stable-2022-07-29' of .. git tree: upstream console output: https://syzkaller.appspot.com/x/log.txt?x=13ee9c82080000 kernel config: https://syzkaller.appspot.com/x/.config?x=26034e6fe0075dad dashboard link: https://syzkaller.appspot.com/bug?extid=845cd8e5c47f2a125683 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. IMPORTANT: if you fix the issue, please add the following tag to the commit: Reported-by: syzbot+845cd8e5c47f2a125683@xxxxxxxxxxxxxxxxxxxxxxxxx ================================================================== BUG: KASAN: null-ptr-deref in instrument_atomic_read include/linux/instrumented.h:71 [inline] BUG: KASAN: null-ptr-deref in test_bit include/asm-generic/bitops/instrumented-non-atomic.h:134 [inline] BUG: KASAN: null-ptr-deref in set_buffer_uptodate include/linux/buffer_head.h:120 [inline] BUG: KASAN: null-ptr-deref in do_journal_end+0x135f/0x4b00 fs/reiserfs/journal.c:4080 Read of size 8 at addr 0000000000000000 by task syz-executor.4/7438 CPU: 0 PID: 7438 Comm: syz-executor.4 Not tainted 5.19.0-rc8-syzkaller-00152-g620725263f42 #0 Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 07/22/2022 Call Trace: <TASK> __dump_stack lib/dump_stack.c:88 [inline] dump_stack_lvl+0xcd/0x134 lib/dump_stack.c:106 print_report mm/kasan/report.c:432 [inline] kasan_report.cold+0x61/0x1c6 mm/kasan/report.c:491 check_region_inline mm/kasan/generic.c:183 [inline] kasan_check_range+0x13d/0x180 mm/kasan/generic.c:189 instrument_atomic_read include/linux/instrumented.h:71 [inline] test_bit include/asm-generic/bitops/instrumented-non-atomic.h:134 [inline] set_buffer_uptodate include/linux/buffer_head.h:120 [inline] do_journal_end+0x135f/0x4b00 fs/reiserfs/journal.c:4080 reiserfs_sync_fs+0xf8/0x120 fs/reiserfs/super.c:78 sync_filesystem.part.0+0x75/0x1d0 fs/sync.c:56 sync_filesystem+0x8b/0xc0 fs/sync.c:43 generic_shutdown_super+0x70/0x400 fs/super.c:445 kill_block_super+0x97/0xf0 fs/super.c:1394 deactivate_locked_super+0x94/0x160 fs/super.c:332 deactivate_super+0xad/0xd0 fs/super.c:363 cleanup_mnt+0x3a2/0x540 fs/namespace.c:1186 task_work_run+0xdd/0x1a0 kernel/task_work.c:177 resume_user_mode_work include/linux/resume_user_mode.h:49 [inline] exit_to_user_mode_loop kernel/entry/common.c:169 [inline] exit_to_user_mode_prepare+0x23c/0x250 kernel/entry/common.c:201 __syscall_exit_to_user_mode_work kernel/entry/common.c:283 [inline] syscall_exit_to_user_mode+0x19/0x50 kernel/entry/common.c:294 do_syscall_64+0x42/0xb0 arch/x86/entry/common.c:86 entry_SYSCALL_64_after_hwframe+0x63/0xcd RIP: 0033:0x7f5f3988a677 Code: ff ff ff f7 d8 64 89 01 48 83 c8 ff c3 66 0f 1f 44 00 00 31 f6 e9 09 00 00 00 66 0f 1f 84 00 00 00 00 00 b8 a6 00 00 00 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:00007ffcab38a818 EFLAGS: 00000246 ORIG_RAX: 00000000000000a6 RAX: 0000000000000000 RBX: 0000000000000000 RCX: 00007f5f3988a677 RDX: 00007ffcab38a8eb RSI: 000000000000000a RDI: 00007ffcab38a8e0 RBP: 00007ffcab38a8e0 R08: 00000000ffffffff R09: 00007ffcab38a6b0 R10: 000055555635d8b3 R11: 0000000000000246 R12: 00007f5f398e22a6 R13: 00007ffcab38b9a0 R14: 000055555635d810 R15: 00007ffcab38b9e0 </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.
