NILFS (loop0): nilfs_get_block (ino=15): a race condition while inserting a data block at offset=4
------------[ cut here ]------------
kernel BUG at fs/buffer.c:2765!
Internal error: Oops - BUG: 00000000f2000800 [#1] PREEMPT SMP
Modules linked in:
CPU: 0 PID: 6161 Comm: syz-executor168 Not tainted 6.8.0-rc7-syzkaller-g707081b61156 #0
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/25/2024
pstate: 80400005 (Nzcv daif +PAN -UAO -TCO -DIT -SSBS BTYPE=--)
pc : submit_bh_wbc+0x430/0x49c fs/buffer.c:2765
lr : submit_bh_wbc+0x430/0x49c fs/buffer.c:2765
sp : ffff8000979a7490
x29: ffff8000979a74a0 x28: 0000000000001000 x27: dfff800000000000
x26: 0000000000000004 x25: fffffdffc370d100 x24: 0000000000000000
x23: ffff0000de8013a0 x22: 0000000000000004 x21: 0000000000000000
x20: ffff0000de8013a0 x19: 1fffe0001bd00274 x18: ffff8000979a68a0
x17: 20656c696877206e x16: ffff80008031f6c4 x15: 0000000000000001
x14: 1fffe0001bd00280 x13: 0000000000000000 x12: 0000000000000000
x11: ffff60001bd00281 x10: 0000000000ff0100 x9 : 0000000000000000
x8 : ffff0000d6233c00 x7 : 0000000000000001 x6 : 0000000000000001
x5 : ffff8000979a6b78 x4 : 0000000000000002 x3 : ffff800080bdf0c4
x2 : 0000000000000000 x1 : 0000000000000000 x0 : 0000000000000000
Call trace:
 submit_bh_wbc+0x430/0x49c fs/buffer.c:2765
 submit_bh fs/buffer.c:2805 [inline]
 __bh_read fs/buffer.c:3070 [inline]
 bh_read_nowait include/linux/buffer_head.h:417 [inline]
 __block_write_begin_int+0xa40/0x16a0 fs/buffer.c:2132
 __block_write_begin fs/buffer.c:2152 [inline]
 block_write_begin+0x98/0x11c fs/buffer.c:2211
 nilfs_write_begin+0xa8/0x114 fs/nilfs2/inode.c:262
 generic_perform_write+0x28c/0x588 mm/filemap.c:3930
 __generic_file_write_iter+0xfc/0x204 mm/filemap.c:4025
 generic_file_write_iter+0xb8/0x2b4 mm/filemap.c:4051
 do_iter_readv_writev+0x38c/0x540
 vfs_writev+0x410/0xb58 fs/read_write.c:971
 do_pwritev fs/read_write.c:1072 [inline]
 __do_sys_pwritev2 fs/read_write.c:1131 [inline]
 __se_sys_pwritev2 fs/read_write.c:1122 [inline]
 __arm64_sys_pwritev2+0x1dc/0x2f0 fs/read_write.c:1122
 __invoke_syscall arch/arm64/kernel/syscall.c:34 [inline]
 invoke_syscall+0x98/0x2b8 arch/arm64/kernel/syscall.c:48
 el0_svc_common+0x130/0x23c arch/arm64/kernel/syscall.c:133
 do_el0_svc+0x48/0x58 arch/arm64/kernel/syscall.c:152
 el0_svc+0x54/0x168 arch/arm64/kernel/entry-common.c:712
 el0t_64_sync_handler+0x84/0xfc arch/arm64/kernel/entry-common.c:730
 el0t_64_sync+0x190/0x194 arch/arm64/kernel/entry.S:598
Code: 17ffffaf 97e52d4c d4210000 97e52d4a (d4210000) 
---[ end trace 0000000000000000 ]---