syzbot


KASAN: null-ptr-deref Read in do_journal_end (2)

Status: upstream: reported on 2022/07/30 19:30
Reported-by: syzbot+845cd8e5c47f2a125683@syzkaller.appspotmail.com
First crash: 197d, last: 38d
similar bugs (1):
Kernel Title Repro Cause bisect Fix bisect Count Last Reported Patched Status
upstream KASAN: null-ptr-deref Read in do_journal_end 1 345d 340d 0/24 auto-closed as invalid on 2022/02/20 18:03

Sample crash report:
==================================================================
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>
==================================================================

Crashes (6):
Manager Time Kernel Commit Syzkaller Config Log Report Syz repro C repro VM info Title
ci-upstream-kasan-gce-root 2022/07/30 19:30 upstream 620725263f42 fef302b1 .config log report info KASAN: null-ptr-deref Read in do_journal_end
ci-qemu-upstream 2022/07/12 17:39 upstream 5a29232d870d d91dd8ea .config log report info KASAN: null-ptr-deref Read in do_journal_end
ci-qemu-upstream 2022/04/16 01:20 upstream 59250f8a7f3a 8bcc32a6 .config log report info KASAN: null-ptr-deref Read in do_journal_end
ci-upstream-kasan-gce-selinux-root 2022/04/01 14:12 upstream e8b767f5e040 20955a24 .config log report info KASAN: null-ptr-deref Read in do_journal_end
ci-upstream-kasan-gce-selinux-root 2022/03/19 20:50 upstream 97e9c8eb4bb1 e2d91b1d .config log report info KASAN: null-ptr-deref Read in do_journal_end
ci-upstream-kasan-gce-selinux-root 2022/08/25 21:15 upstream 3f5c20055a64 9b5bf4cd .config log report info KASAN: null-ptr-deref Write in do_journal_end
* Struck through repros no longer work on HEAD.