EXT4-fs (loop0): 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: 384 Comm: syz-executor212 Not tainted 5.4.197-syzkaller-00011-gf3c75e616e3f #0 Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 07/22/2022 RIP: 0010:__block_commit_write+0x22e/0x230 fs/buffer.c:2042 Code: 48 8b 5c 24 10 48 89 df be 08 00 00 00 e8 5a 48 ee ff f0 80 0b 04 48 83 c4 20 5b 41 5c 41 5d 41 5e 41 5f 5d c3 e8 d2 0a c2 ff <0f> 0b 55 41 57 41 56 41 55 41 54 53 48 83 ec 28 4c 89 0c 24 44 89 RSP: 0018:ffff8881f24e7a60 EFLAGS: 00010293 RAX: ffffffff819e481e RBX: 0000000000000000 RCX: ffff8881dd14af40 RDX: 0000000000000000 RSI: 0000000000000000 RDI: 0000000000000000 RBP: ffffea00077c4e40 R08: ffffffff819e4650 R09: fffff94000ef89c9 R10: fffff94000ef89c9 R11: 1ffffd4000ef89c8 R12: 00000000000001d0 R13: 00000000000001c0 R14: 8000000000000005 R15: 0000000000000010 FS: 00007f950dfa9700(0000) GS:ffff8881f6e00000(0000) knlGS:0000000000000000 CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033 CR2: 00007f950df88718 CR3: 00000001dd570000 CR4: 00000000003406f0 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+0x217/0xe40 fs/ext4/inode.c:1456 generic_perform_write+0x395/0x510 mm/filemap.c:3322 __generic_file_write_iter+0x239/0x490 mm/filemap.c:3440 ext4_file_write_iter+0x46e/0x1040 fs/ext4/file.c:270 call_write_iter include/linux/fs.h:1976 [inline] new_sync_write fs/read_write.c:483 [inline] __vfs_write+0x4f9/0x6a0 fs/read_write.c:496 vfs_write+0x210/0x4f0 fs/read_write.c:558 ksys_write+0x158/0x260 fs/read_write.c:611 do_syscall_64+0xcb/0x1c0 arch/x86/entry/common.c:290 entry_SYSCALL_64_after_hwframe+0x44/0xa9 RIP: 0033:0x7f950dffccc9 Code: ff ff c3 66 2e 0f 1f 84 00 00 00 00 00 0f 1f 40 00 48 89 f8 48 89 f7 48 89 d6 48 89 ca 4d 89 c2 4d 89 c8 4c 8b 4c 24 08 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:00007f950dfa92f8 EFLAGS: 00000246 ORIG_RAX: 0000000000000001 RAX: ffffffffffffffda RBX: 0000000000000025 RCX: 00007f950dffccc9 RDX: 0000000000000010 RSI: 0000000020000280 RDI: 0000000000000003 RBP: 00007f950e0824a8 R08: 0000000000000000 R09: 0000000000000000 R10: 0000000000000000 R11: 0000000000000246 R12: 00007f950e0824a0 R13: 00007f950e04f0bc R14: 0030656c69662f2e R15: e5d26e84aa4cf3c6 Modules linked in: ---[ end trace 96a1001f9e9d8336 ]--- RIP: 0010:__block_commit_write+0x22e/0x230 fs/buffer.c:2042 Code: 48 8b 5c 24 10 48 89 df be 08 00 00 00 e8 5a 48 ee ff f0 80 0b 04 48 83 c4 20 5b 41 5c 41 5d 41 5e 41 5f 5d c3 e8 d2 0a c2 ff <0f> 0b 55 41 57 41 56 41 55 41 54 53 48 83 ec 28 4c 89 0c 24 44 89 RSP: 0018:ffff8881f24e7a60 EFLAGS: 00010293 RAX: ffffffff819e481e RBX: 0000000000000000 RCX: ffff8881dd14af40 RDX: 0000000000000000 RSI: 0000000000000000 RDI: 0000000000000000 RBP: ffffea00077c4e40 R08: ffffffff819e4650 R09: fffff94000ef89c9 R10: fffff94000ef89c9 R11: 1ffffd4000ef89c8 R12: 00000000000001d0 R13: 00000000000001c0 R14: 8000000000000005 R15: 0000000000000010 FS: 00007f950dfa9700(0000) GS:ffff8881f6e00000(0000) knlGS:0000000000000000 CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033 CR2: 00007f950df88718 CR3: 00000001dd570000 CR4: 00000000003406f0 DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000 DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400