Good day, dear maintainers, We found a bug using a modified kernel configuration file used by syzbot. We enhanced the coverage of the configuration file using our tool, klocalizer. Kernel Branch: 6.3.0-next-20230426 Kernel Config: https://drive.google.com/file/d/1-RlEeQ2ltqar6W2DptSUYYmrZzBjjcQI/view?usp=sharing Reproducer: https://drive.google.com/file/d/1xezJdfFWY-Q0Djh6x5LQqNq-9c_ru8c5/view?usp=sharing Thank you! Best regards, Sanan Hasanov ------------[ cut here ]------------ kernel BUG at fs/reiserfs/prints.c:390! invalid opcode: 0000 [#1] PREEMPT SMP KASAN CPU: 1 PID: 7350 Comm: syz-executor.2 Not tainted 6.3.0-next-20230426 #1 Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS 1.15.0-1 04/01/2014 RIP: 0010:__reiserfs_panic+0xf7/0x150 fs/reiserfs/prints.c:390 Code: 68 ff 4d 89 e8 4c 89 f1 4c 89 e2 48 8d b3 a8 06 00 00 49 c7 c1 60 5f 92 90 48 c7 c7 00 55 e1 89 e8 0e 51 4d ff e8 89 ff 68 ff <0f> 0b 49 c7 c6 a0 53 e1 89 4d 89 f4 eb c5 e8 76 ff 68 ff 4d 85 e4 RSP: 0018:ffffc9000f1ffa00 EFLAGS: 00010293 RAX: 0000000000000000 RBX: ffff8880ad15a000 RCX: 0000000000000000 RDX: ffff88810cfd9dc0 RSI: ffffffff821888a7 RDI: 0000000000000005 RBP: ffffc9000f1ffad0 R08: 0000000000000005 R09: 0000000000000000 R10: 0000000080000000 R11: 00000000014aed60 R12: ffffffff89e1bee0 R13: ffffffff89e1c700 R14: ffffffff89e15360 R15: 0000000000007b1a FS: 0000555557345980(0000) GS:ffff888119c80000(0000) knlGS:0000000000000000 CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033 CR2: 000055555734edc8 CR3: 000000005f30a000 CR4: 0000000000350ee0 Call Trace: <TASK> do_journal_end+0x3f22/0x4ad0 fs/reiserfs/journal.c:4149 reiserfs_sync_fs+0xfc/0x130 fs/reiserfs/super.c:78 sync_filesystem fs/sync.c:56 [inline] sync_filesystem+0x109/0x290 fs/sync.c:30 generic_shutdown_super+0x74/0x480 fs/super.c:473 kill_block_super+0xa1/0x100 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+0x168/0x260 kernel/task_work.c:179 resume_user_mode_work include/linux/resume_user_mode.h:49 [inline] exit_to_user_mode_loop kernel/entry/common.c:171 [inline] exit_to_user_mode_prepare+0x210/0x240 kernel/entry/common.c:204 __syscall_exit_to_user_mode_work kernel/entry/common.c:286 [inline] syscall_exit_to_user_mode+0x1d/0x50 kernel/entry/common.c:297 do_syscall_64+0x46/0x80 arch/x86/entry/common.c:86 entry_SYSCALL_64_after_hwframe+0x63/0xcd RIP: 0033:0x7fdd95e9173b Code: ff ff ff f7 d8 64 89 01 48 83 c8 ff c3 66 90 f3 0f 1e fa 31 f6 e9 05 00 00 00 0f 1f 44 00 00 f3 0f 1e fa 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:00007ffcbd482888 EFLAGS: 00000246 ORIG_RAX: 00000000000000a6 RAX: 0000000000000000 RBX: 0000000000000000 RCX: 00007fdd95e9173b RDX: 00007fdd95e28c20 RSI: 000000000000000a RDI: 00007ffcbd482950 RBP: 00007ffcbd482950 R08: 00007fdd95efb54e R09: 00007ffcbd482710 R10: 00000000fffffffb R11: 0000000000000246 R12: 00007fdd95efb527 R13: 00007ffcbd4839f0 R14: 0000555557346d90 R15: 0000000000000032 </TASK> Modules linked in: ---[ end trace 0000000000000000 ]--- RIP: 0010:__reiserfs_panic+0xf7/0x150 fs/reiserfs/prints.c:390 Code: 68 ff 4d 89 e8 4c 89 f1 4c 89 e2 48 8d b3 a8 06 00 00 49 c7 c1 60 5f 92 90 48 c7 c7 00 55 e1 89 e8 0e 51 4d ff e8 89 ff 68 ff <0f> 0b 49 c7 c6 a0 53 e1 89 4d 89 f4 eb c5 e8 76 ff 68 ff 4d 85 e4 RSP: 0018:ffffc9000f1ffa00 EFLAGS: 00010293 RAX: 0000000000000000 RBX: ffff8880ad15a000 RCX: 0000000000000000 RDX: ffff88810cfd9dc0 RSI: ffffffff821888a7 RDI: 0000000000000005 RBP: ffffc9000f1ffad0 R08: 0000000000000005 R09: 0000000000000000 R10: 0000000080000000 R11: 00000000014aed60 R12: ffffffff89e1bee0 R13: ffffffff89e1c700 R14: ffffffff89e15360 R15: 0000000000007b1a FS: 0000555557345980(0000) GS:ffff888119c80000(0000) knlGS:0000000000000000 CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033 CR2: 00007fe5d85c0000 CR3: 000000005f30a000 CR4: 0000000000350ee0
