EXT4-fs error (device loop3): ext4_map_blocks:718: inode #18: block 209: comm syz-executor.3: lblock 97 mapped to illegal pblock 209 (length 1)
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kernel BUG at fs/ext4/ext4.h:3248!
invalid opcode: 0000 [#1] PREEMPT SMP KASAN
CPU: 1 PID: 871 Comm: syz-executor.3 Not tainted 5.10.161-syzkaller-00019-g416c4356f372 #0
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 03/02/2023
RIP: 0010:ext4_get_group_info fs/ext4/ext4.h:3248 [inline]
RIP: 0010:ext4_mb_load_buddy_gfp+0xe54/0xec0 fs/ext4/mballoc.c:1174
Code: ff e8 40 13 c8 ff e9 c8 f3 ff ff 89 f9 80 e1 07 80 c1 03 38 c1 0f 8c 14 f4 ff ff e8 46 13 c8 ff e9 0a f4 ff ff e8 ec 10 8e ff <0f> 0b e8 e5 10 8e ff 4c 89 ef e8 5d 64 cd ff e9 34 fc ff ff e8 d3
RSP: 0018:ffffc900063cea58 EFLAGS: 00010293
RAX: ffffffff81df10c4 RBX: 0000000000000001 RCX: ffff888111bf0000
RDX: 0000000000000000 RSI: 00000000ffffdfff RDI: 0000000000000001
RBP: ffffc900063ceaf0 R08: ffffffff81df034c R09: ffffed102bc45735
R10: ffffed102bc45735 R11: 1ffff1102bc45734 R12: 1ffff11021c4c879
R13: ffff88810e260000 R14: 00000000ffffdfff R15: dffffc0000000000
FS:  00007f6ac0409700(0000) GS:ffff8881f7100000(0000) knlGS:0000000000000000
CS:  0010 DS: 0000 ES: 0000 CR0: 0000000080050033
CR2: 0000000020f0007f CR3: 000000011d453000 CR4: 00000000003506a0
DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000
DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400
Call Trace:
 ext4_discard_preallocations+0x803/0xf10 fs/ext4/mballoc.c:4451
 ext4_truncate+0xa8b/0x1270 fs/ext4/inode.c:4353
 ext4_truncate_failed_write fs/ext4/truncate.h:20 [inline]
 ext4_write_begin+0xd12/0x16f0 fs/ext4/inode.c:1254
 ext4_da_write_begin+0x4a8/0xf10 fs/ext4/inode.c:3022
 generic_perform_write+0x309/0x5b0 mm/filemap.c:3468
 ext4_buffered_write_iter+0x47c/0x610 fs/ext4/file.c:272
 ext4_file_write_iter+0x192/0x1c70 fs/ext4/file.c:689
 do_iter_readv_writev+0x52a/0x720 fs/read_write.c:737
 do_iter_write+0x182/0x660 fs/read_write.c:866
 vfs_iter_write+0x7c/0xa0 fs/read_write.c:907
 iter_file_splice_write+0x8a1/0x10c0 fs/splice.c:686
 do_splice_from fs/splice.c:764 [inline]
 direct_splice_actor+0xfe/0x130 fs/splice.c:933
 splice_direct_to_actor+0x4f4/0xbd0 fs/splice.c:888
 do_splice_direct+0x2a0/0x3f0 fs/splice.c:976
 do_sendfile+0x9c7/0x1150 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+0x1ce/0x230 fs/read_write.c:1304
 do_syscall_64+0x34/0x70 arch/x86/entry/common.c:46
 entry_SYSCALL_64_after_hwframe+0x61/0xc6
RIP: 0033:0x7f6ac99b70f9
Code: 28 00 00 00 75 05 48 83 c4 28 c3 e8 f1 19 00 00 90 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:00007f6ac0409168 EFLAGS: 00000246 ORIG_RAX: 0000000000000028
RAX: ffffffffffffffda RBX: 00007f6ac9ad7050 RCX: 00007f6ac99b70f9
RDX: 0000000000000000 RSI: 0000000000000007 RDI: 0000000000000004
RBP: 00007f6ac9a12ae9 R08: 0000000000000000 R09: 0000000000000000
R10: 00008400fffffffa R11: 0000000000000246 R12: 0000000000000000
R13: 00007fffd30bd6df R14: 00007f6ac0409300 R15: 0000000000022000
Modules linked in:
---[ end trace d6738dedc328ba45 ]---
RIP: 0010:ext4_get_group_info fs/ext4/ext4.h:3248 [inline]
RIP: 0010:ext4_mb_load_buddy_gfp+0xe54/0xec0 fs/ext4/mballoc.c:1174
Code: ff e8 40 13 c8 ff e9 c8 f3 ff ff 89 f9 80 e1 07 80 c1 03 38 c1 0f 8c 14 f4 ff ff e8 46 13 c8 ff e9 0a f4 ff ff e8 ec 10 8e ff <0f> 0b e8 e5 10 8e ff 4c 89 ef e8 5d 64 cd ff e9 34 fc ff ff e8 d3
RSP: 0018:ffffc900063cea58 EFLAGS: 00010293
RAX: ffffffff81df10c4 RBX: 0000000000000001 RCX: ffff888111bf0000
RDX: 0000000000000000 RSI: 00000000ffffdfff RDI: 0000000000000001
RBP: ffffc900063ceaf0 R08: ffffffff81df034c R09: ffffed102bc45735
R10: ffffed102bc45735 R11: 1ffff1102bc45734 R12: 1ffff11021c4c879
R13: ffff88810e260000 R14: 00000000ffffdfff R15: dffffc0000000000
FS:  00007f6ac0409700(0000) GS:ffff8881f7000000(0000) knlGS:0000000000000000
CS:  0010 DS: 0000 ES: 0000 CR0: 0000000080050033
CR2: 00007f13b1be7000 CR3: 000000011d453000 CR4: 00000000003506b0
DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000
DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400