EXT4-fs (loop2): Warning: mounting with an experimental mount option 'dioread_nolock' for blocksize < PAGE_SIZE
EXT4-fs (loop2): mounted filesystem without journal. Opts: delalloc,data_err=abort,barrier=0x0000000000000003,bsddf,bh,oldalloc,data_err=ignore,nouid32,nobh,user_xattr,nouid32,dioread_nolock,,errors=continue
------------[ cut here ]------------
kernel BUG at fs/ext4/extents_status.c:968!
invalid opcode: 0000 [#1] PREEMPT SMP KASAN
CPU: 1 PID: 389 Comm: syz.2.18 Not tainted syzkaller #0
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 02/12/2026
RIP: 0010:ext4_es_cache_extent+0x57b/0x5d0 fs/ext4/extents_status.c:968
Code: e8 03 42 80 3c 38 00 74 08 48 89 df e8 5e 3e d2 ff 48 8b 3b 48 8b 74 24 28 48 8d 54 24 60 e8 fc 72 0c 00 eb 13 e8 15 bd 97 ff <0f> 0b e8 0e bd 97 ff eb 28 e8 07 bd 97 ff 31 f6 65 ff 0d 3a 74 35
RSP: 0018:ffffc90001ec6500 EFLAGS: 00010293
RAX: ffffffff81ccf93b RBX: 0000000000000098 RCX: ffff8881114693c0
RDX: 0000000000000000 RSI: 0000000000000098 RDI: 0000000000000096
RBP: ffffc90001ec6608 R08: ffffc90001ec6577 R09: ffffc90001ec6560
R10: dffffc0000000000 R11: fffff520003d8caf R12: ffff8881115a53c8
R13: 47ffffffffffffff R14: 0000000000000096 R15: dffffc0000000000
FS:  0000555595053500(0000) GS:ffff8881f7100000(0000) knlGS:0000000000000000
CS:  0010 DS: 0000 ES: 0000 CR0: 0000000080050033
CR2: 00007f5ced3abdac CR3: 0000000110a78000 CR4: 00000000003506a0
DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000
DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400
Call Trace:
 ext4_cache_extents fs/ext4/extents.c:516 [inline]
 __read_extent_tree_block+0x44b/0x790 fs/ext4/extents.c:563
 ext4_find_extent+0x8b9/0xe20 fs/ext4/extents.c:928
 ext4_ext_map_blocks+0x20b/0x5dd0 fs/ext4/extents.c:4160
 ext4_map_blocks+0x985/0x1bd0 fs/ext4/inode.c:674
 _ext4_get_block+0x1d1/0x4e0 fs/ext4/inode.c:817
 ext4_get_block_unwritten+0x2a/0x40 fs/ext4/inode.c:848
 ext4_block_write_begin+0x573/0x1340 fs/ext4/inode.c:1101
 ext4_write_begin+0x67e/0x1690 fs/ext4/ext4_jbd2.h:-1
 ext4_da_write_begin+0x478/0xf10 fs/ext4/inode.c:3033
 generic_perform_write+0x2ce/0x540 mm/filemap.c:3509
 ext4_buffered_write_iter+0x4b8/0x640 fs/ext4/file.c:271
 ext4_file_write_iter+0x53f/0x1980 fs/ext4/file.c:-1
 do_iter_readv_writev+0x478/0x5f0 fs/read_write.c:-1
 do_iter_write+0x189/0x630 fs/read_write.c:866
 vfs_iter_write+0x7d/0xa0 fs/read_write.c:907
 iter_file_splice_write+0x68c/0xcb0 fs/splice.c:689
 do_splice_from fs/splice.c:767 [inline]
 direct_splice_actor+0xe9/0x120 fs/splice.c:936
 splice_direct_to_actor+0x4cb/0xb30 fs/splice.c:891
 do_splice_direct+0x1c2/0x2d0 fs/splice.c:979
 do_sendfile+0x8df/0x1040 fs/read_write.c:1257
 __do_sys_sendfile64 fs/read_write.c:1318 [inline]
 __se_sys_sendfile64 fs/read_write.c:1304 [inline]
 __x64_sys_sendfile64+0x199/0x1f0 fs/read_write.c:1304
 do_syscall_64+0x31/0x40 arch/x86/entry/common.c:46
 entry_SYSCALL_64_after_hwframe+0x61/0xcb
RIP: 0033:0x7f5ced130799
Code: ff c3 66 2e 0f 1f 84 00 00 00 00 00 0f 1f 44 00 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 e8 ff ff ff f7 d8 64 89 01 48
RSP: 002b:00007fff08038608 EFLAGS: 00000246 ORIG_RAX: 0000000000000028
RAX: ffffffffffffffda RBX: 00007f5ced3a9fa0 RCX: 00007f5ced130799
RDX: 0000000000000000 RSI: 0000000000000004 RDI: 0000000000000005
RBP: 00007f5ced1c6bd9 R08: 0000000000000000 R09: 0000000000000000
R10: 000000000003ffff R11: 0000000000000246 R12: 0000000000000000
R13: 00007f5ced3a9fac R14: 00007f5ced3a9fa0 R15: 00007f5ced3a9fa0
Modules linked in:
---[ end trace aab403488aacf765 ]---
RIP: 0010:ext4_es_cache_extent+0x57b/0x5d0 fs/ext4/extents_status.c:968
Code: e8 03 42 80 3c 38 00 74 08 48 89 df e8 5e 3e d2 ff 48 8b 3b 48 8b 74 24 28 48 8d 54 24 60 e8 fc 72 0c 00 eb 13 e8 15 bd 97 ff <0f> 0b e8 0e bd 97 ff eb 28 e8 07 bd 97 ff 31 f6 65 ff 0d 3a 74 35
RSP: 0018:ffffc90001ec6500 EFLAGS: 00010293
RAX: ffffffff81ccf93b RBX: 0000000000000098 RCX: ffff8881114693c0
RDX: 0000000000000000 RSI: 0000000000000098 RDI: 0000000000000096
RBP: ffffc90001ec6608 R08: ffffc90001ec6577 R09: ffffc90001ec6560
R10: dffffc0000000000 R11: fffff520003d8caf R12: ffff8881115a53c8
R13: 47ffffffffffffff R14: 0000000000000096 R15: dffffc0000000000
FS:  0000555595053500(0000) GS:ffff8881f7000000(0000) knlGS:0000000000000000
CS:  0010 DS: 0000 ES: 0000 CR0: 0000000080050033
CR2: 00005555950534e8 CR3: 0000000110a78000 CR4: 00000000003506b0
DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000
DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400