EXT4-fs error (device loop9): ext4_map_blocks:617: inode #15: block 193: comm syz.9.376: lblock 64 mapped to illegal pblock 193 (length 1)
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kernel BUG at fs/ext4/ext4.h:2985!
invalid opcode: 0000 [#1] PREEMPT SMP KASAN
CPU: 1 PID: 1945 Comm: syz.9.376 Tainted: G        W         5.4.292-syzkaller-00021-gcd8e74fa0fa3 #0
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 02/12/2025
RIP: 0010:ext4_get_group_info fs/ext4/ext4.h:2985 [inline]
RIP: 0010:ext4_mb_load_buddy_gfp+0xeb2/0xed0 fs/ext4/mballoc.c:1117
Code: ff e8 82 5e cd ff e9 82 f3 ff ff 89 f9 80 e1 07 80 c1 03 38 c1 0f 8c c8 f3 ff ff e8 88 5e cd ff e9 be f3 ff ff e8 ce 63 9f ff <0f> 0b e8 c7 63 9f ff 0f 0b e8 c0 63 9f ff 0f 0b e8 b9 63 9f ff 0f
RSP: 0018:ffff8881c9c7f148 EFLAGS: 00010283
RAX: ffffffff81c01b12 RBX: 0000000000000001 RCX: 0000000000080000
RDX: ffffc900002a7000 RSI: 000000000003fb82 RDI: 000000000003fb83
RBP: ffff8881c9c7f1d0 R08: dffffc0000000000 R09: ffff8881c9c7f228
R10: ffffed103938fe4c R11: 1ffff1103938fe45 R12: 1ffff1103abaae7e
R13: ffff8881f5ff6000 R14: ffff8881d5d57018 R15: 00000000ffffb7dc
FS:  00007fc6918c56c0(0000) GS:ffff8881f6f00000(0000) knlGS:0000000000000000
CS:  0010 DS: 0000 ES: 0000 CR0: 0000000080050033
CR2: 0000200000002000 CR3: 00000001e61ab000 CR4: 00000000003426a0
DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000
DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400
Call Trace:
 ext4_discard_preallocations+0x5b2/0xae0 fs/ext4/mballoc.c:4124
 ext4_truncate+0xa08/0x1270 fs/ext4/inode.c:4638
 ext4_truncate_failed_write fs/ext4/truncate.h:20 [inline]
 ext4_direct_IO_write fs/ext4/inode.c:3854 [inline]
 ext4_direct_IO+0xe02/0x18c0 fs/ext4/inode.c:3992
 generic_file_direct_write+0x3c1/0x600 mm/filemap.c:3353
 __generic_file_write_iter+0x298/0x480 mm/filemap.c:3536
 ext4_file_write_iter+0x84f/0xf90 fs/ext4/file.c:270
 do_iter_readv_writev+0x491/0x600 fs/read_write.c:690
 do_iter_write+0x189/0x5b0 fs/read_write.c:970
 vfs_writev+0x1fb/0x340 fs/read_write.c:1015
 do_pwritev fs/read_write.c:1112 [inline]
 __do_sys_pwritev2 fs/read_write.c:1171 [inline]
 __se_sys_pwritev2+0x1a9/0x2b0 fs/read_write.c:1162
 __x64_sys_pwritev2+0xbf/0xd0 fs/read_write.c:1162
 do_syscall_64+0xcf/0x170 arch/x86/entry/common.c:290
 entry_SYSCALL_64_after_hwframe+0x5c/0xc1
RIP: 0033:0x7fc6936c1969
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 a8 ff ff ff f7 d8 64 89 01 48
RSP: 002b:00007fc6918c5038 EFLAGS: 00000246 ORIG_RAX: 0000000000000148
RAX: ffffffffffffffda RBX: 00007fc6938e9240 RCX: 00007fc6936c1969
RDX: 0000000000000001 RSI: 0000200000000240 RDI: 0000000000000008
RBP: 00007fc693743ab1 R08: 0000000000000000 R09: 0000000000000003
R10: 0000000000002000 R11: 0000000000000246 R12: 0000000000000000
R13: 0000000000000000 R14: 00007fc6938e9240 R15: 00007fff29640ac8
Modules linked in:
---[ end trace 0c42a780dd9e20ab ]---
RIP: 0010:ext4_get_group_info fs/ext4/ext4.h:2985 [inline]
RIP: 0010:ext4_mb_load_buddy_gfp+0xeb2/0xed0 fs/ext4/mballoc.c:1117
Code: ff e8 82 5e cd ff e9 82 f3 ff ff 89 f9 80 e1 07 80 c1 03 38 c1 0f 8c c8 f3 ff ff e8 88 5e cd ff e9 be f3 ff ff e8 ce 63 9f ff <0f> 0b e8 c7 63 9f ff 0f 0b e8 c0 63 9f ff 0f 0b e8 b9 63 9f ff 0f
RSP: 0018:ffff8881c9c7f148 EFLAGS: 00010283
RAX: ffffffff81c01b12 RBX: 0000000000000001 RCX: 0000000000080000
RDX: ffffc900002a7000 RSI: 000000000003fb82 RDI: 000000000003fb83
RBP: ffff8881c9c7f1d0 R08: dffffc0000000000 R09: ffff8881c9c7f228
R10: ffffed103938fe4c R11: 1ffff1103938fe45 R12: 1ffff1103abaae7e
R13: ffff8881f5ff6000 R14: ffff8881d5d57018 R15: 00000000ffffb7dc
FS:  00007fc6918c56c0(0000) GS:ffff8881f6f00000(0000) knlGS:0000000000000000
CS:  0010 DS: 0000 ES: 0000 CR0: 0000000080050033
CR2: 00007f449429df98 CR3: 00000001e61ab000 CR4: 00000000003426a0
DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000
DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400