EXT4-fs (loop4): mounted filesystem without journal. Opts: ,errors=continue ------------[ cut here ]------------ kernel BUG at fs/buffer.c:2042! invalid opcode: 0000 [#1] PREEMPT SMP KASAN CPU: 0 PID: 749 Comm: syz-executor.4 Not tainted 5.4.259-syzkaller-00001-g9ca091c99214 #0 Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 11/17/2023 RIP: 0010:__block_commit_write+0x217/0x220 fs/buffer.c:2042 Code: 48 8b 5c 24 10 48 89 df be 08 00 00 00 e8 71 54 ea ff f0 80 0b 04 48 83 c4 20 5b 41 5c 41 5d 41 5e 41 5f 5d c3 e8 19 b0 ba ff <0f> 0b 0f 1f 80 00 00 00 00 55 41 57 41 56 41 55 41 54 53 48 83 ec RSP: 0018:ffff8881ea287800 EFLAGS: 00010293 RAX: ffffffff81a99487 RBX: 8000000000000007 RCX: ffff8881eaf32f40 RDX: 0000000000000000 RSI: 0000000000000000 RDI: 0000000000000000 RBP: 0000000000000000 R08: ffffffff81a992cf R09: fffff94000ebd9f1 R10: 0000000000000000 R11: dffffc0000000001 R12: 0000000000000000 R13: 000000000000000c R14: ffffea00075ecf80 R15: 000000000000000c FS: 00007f31d01926c0(0000) GS:ffff8881f6e00000(0000) knlGS:0000000000000000 CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033 CR2: 0000000020005280 CR3: 00000001eb9fe000 CR4: 00000000003406b0 DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000 DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400 Call Trace: block_write_end+0x40/0x80 fs/buffer.c:2131 ext4_write_end+0x235/0xe60 fs/ext4/inode.c:1456 generic_perform_write+0x3d3/0x560 mm/filemap.c:3461 __generic_file_write_iter+0x224/0x530 mm/filemap.c:3579 ext4_file_write_iter+0x499/0x10e0 fs/ext4/file.c:270 call_write_iter include/linux/fs.h:1981 [inline] new_sync_write fs/read_write.c:483 [inline] __vfs_write+0x5d3/0x750 fs/read_write.c:496 vfs_write+0x206/0x4e0 fs/read_write.c:558 ksys_write+0x199/0x2c0 fs/read_write.c:611 do_syscall_64+0xca/0x1c0 arch/x86/entry/common.c:290 entry_SYSCALL_64_after_hwframe+0x5c/0xc1 Modules linked in: ---[ end trace 8a7d61e4211c7cd6 ]--- RIP: 0010:__block_commit_write+0x217/0x220 fs/buffer.c:2042 Code: 48 8b 5c 24 10 48 89 df be 08 00 00 00 e8 71 54 ea ff f0 80 0b 04 48 83 c4 20 5b 41 5c 41 5d 41 5e 41 5f 5d c3 e8 19 b0 ba ff <0f> 0b 0f 1f 80 00 00 00 00 55 41 57 41 56 41 55 41 54 53 48 83 ec RSP: 0018:ffff8881ea287800 EFLAGS: 00010293 RAX: ffffffff81a99487 RBX: 8000000000000007 RCX: ffff8881eaf32f40 RDX: 0000000000000000 RSI: 0000000000000000 RDI: 0000000000000000 RBP: 0000000000000000 R08: ffffffff81a992cf R09: fffff94000ebd9f1 R10: 0000000000000000 R11: dffffc0000000001 R12: 0000000000000000 R13: 000000000000000c R14: ffffea00075ecf80 R15: 000000000000000c FS: 00007f31d01926c0(0000) GS:ffff8881f6f00000(0000) knlGS:0000000000000000 CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033 CR2: 00007f2db7c71000 CR3: 00000001eb9fe000 CR4: 00000000003406a0 DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000 DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400