gfs2: fsid=syz:syz.0: about to withdraw this file system ------------[ cut here ]------------ kernel BUG at fs/gfs2/util.c:340! Oops: invalid opcode: 0000 [#1] SMP KASAN NOPTI CPU: 0 UID: 0 PID: 5349 Comm: gfs2_logd/syz:s Not tainted 6.16.0-rc5-syzkaller-00224-g379f604cc3dc #0 PREEMPT(full) Hardware name: QEMU Standard PC (Q35 + ICH9, 2009), BIOS 1.16.3-debian-1.16.3-2~bpo12+1 04/01/2014 RIP: 0010:gfs2_withdraw+0x1463/0x14f0 fs/gfs2/util.c:340 Code: ff ff 48 8b 4c 24 10 80 e1 07 80 c1 03 38 c1 0f 8c 31 f9 ff ff 48 8b 7c 24 10 e8 d8 89 2a fe e9 22 f9 ff ff e8 4e 07 c7 fd 90 <0f> 0b 48 8b 4c 24 10 80 e1 07 80 c1 03 38 c1 0f 8c 83 f9 ff ff 48 RSP: 0018:ffffc9000d38f8a0 EFLAGS: 00010293 RAX: ffffffff83f92f22 RBX: ffffc9000d38f960 RCX: ffff888000e3c880 RDX: 0000000000000000 RSI: 0000000000000004 RDI: 0000000000000000 RBP: ffffc9000d38fa30 R08: 0000000000000003 R09: 0000000000000004 R10: dffffc0000000000 R11: fffffbfff1bfaa64 R12: dffffc0000000000 R13: 1ffff92001a71f28 R14: 1ffff110087a4015 R15: 0000000000000004 FS: 0000000000000000(0000) GS:ffff88808d21b000(0000) knlGS:0000000000000000 CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033 CR2: 00007f8bb1bff000 CR3: 000000001146b000 CR4: 0000000000352ef0 Call Trace: gfs2_logd+0x12e9/0x1360 fs/gfs2/log.c:1350 kthread+0x70e/0x8a0 kernel/kthread.c:464 ret_from_fork+0x3fc/0x770 arch/x86/kernel/process.c:148 ret_from_fork_asm+0x1a/0x30 arch/x86/entry/entry_64.S:245 Modules linked in: ---[ end trace 0000000000000000 ]---