EXT4-fs (loop3): pa ffff88812357f690: logic 0, phys. 193, len 32 EXT4-fs error (device loop3): ext4_mb_release_inode_pa:4359: group 0, free 13, pa_free 16 ------------[ cut here ]------------ kernel BUG at fs/ext4/mballoc.c:4332! invalid opcode: 0000 [#1] PREEMPT SMP KASAN CPU: 0 PID: 497 Comm: syz.3.18 Not tainted 5.10.237-syzkaller-1007464-g7e2543346ff7 #0 Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 02/12/2025 RIP: 0010:ext4_mb_release_inode_pa+0x9d0/0x9e0 fs/ext4/mballoc.c:4332 Code: 80 c2 03 38 c2 0f 8c 4e fe ff ff 48 89 df 41 89 ce e8 04 6c cc ff 44 89 f1 e9 3b fe ff ff e8 57 7c 92 ff 0f 0b e8 50 7c 92 ff <0f> 0b 66 2e 0f 1f 84 00 00 00 00 00 0f 1f 40 00 55 48 89 e5 41 57 RSP: 0018:ffffc900032be860 EFLAGS: 00010293 RAX: ffffffff81d116b0 RBX: 0000000000000060 RCX: ffff88810d343b40 RDX: 0000000000000000 RSI: 0000000000000060 RDI: 0000000000000000 RBP: ffffc900032be9b0 R08: 0000000000000004 R09: 0000000000000003 R10: fffff52000657d28 R11: 1ffff92000657d28 R12: dffffc0000000000 R13: 000000000000001f R14: 000000000000001f R15: ffff888123540498 FS: 00007f05046bb6c0(0000) GS:ffff8881f7000000(0000) knlGS:0000000000000000 CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033 CR2: 00007f10126aa254 CR3: 000000011a21e000 CR4: 00000000003506b0 DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000 DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400 Call Trace: ext4_mb_discard_group_preallocations+0xba1/0xdd0 fs/ext4/mballoc.c:4478 ext4_mb_discard_preallocations fs/ext4/mballoc.c:5044 [inline] ext4_mb_discard_preallocations_should_retry+0x156/0x600 fs/ext4/mballoc.c:5065 ext4_mb_new_blocks+0x3142/0x42f0 fs/ext4/mballoc.c:5268 ext4_alloc_branch fs/ext4/indirect.c:340 [inline] ext4_ind_map_blocks+0xf32/0x2130 fs/ext4/indirect.c:633 ext4_map_blocks+0x911/0x1bc0 fs/ext4/inode.c:676 _ext4_get_block+0x1bb/0x4b0 fs/ext4/inode.c:817 ext4_get_block+0x39/0x50 fs/ext4/inode.c:834 ext4_block_write_begin+0x567/0x1330 fs/ext4/inode.c:1101 ext4_write_begin+0x651/0x1550 fs/ext4/ext4_jbd2.h:-1 ext4_da_write_begin+0x455/0xe80 fs/ext4/inode.c:3033 generic_perform_write+0x2be/0x510 mm/filemap.c:3509 ext4_buffered_write_iter+0x4b8/0x640 fs/ext4/file.c:271 ext4_file_write_iter+0x536/0x1980 fs/ext4/file.c:-1 call_write_iter include/linux/fs.h:2058 [inline] new_sync_write fs/read_write.c:518 [inline] vfs_write+0x725/0xd60 fs/read_write.c:605 ksys_write+0x140/0x240 fs/read_write.c:658 __do_sys_write fs/read_write.c:670 [inline] __se_sys_write fs/read_write.c:667 [inline] __x64_sys_write+0x7b/0x90 fs/read_write.c:667 do_syscall_64+0x31/0x40 arch/x86/entry/common.c:46 entry_SYSCALL_64_after_hwframe+0x61/0xcb RIP: 0033:0x7f0504c39ef9 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:00007f05046bb038 EFLAGS: 00000246 ORIG_RAX: 0000000000000001 RAX: ffffffffffffffda RBX: 00007f0504df1f80 RCX: 00007f0504c39ef9 RDX: 000000000208e24b RSI: 0000000020000240 RDI: 0000000000000006 RBP: 00007f0504cacb76 R08: 0000000000000000 R09: 0000000000000000 R10: 0000000000000000 R11: 0000000000000246 R12: 0000000000000000 R13: 0000000000000000 R14: 00007f0504df1f80 R15: 00007fff2af93fb8 Modules linked in: ---[ end trace 2bf15b501cdbe3f6 ]--- RIP: 0010:ext4_mb_release_inode_pa+0x9d0/0x9e0 fs/ext4/mballoc.c:4332 Code: 80 c2 03 38 c2 0f 8c 4e fe ff ff 48 89 df 41 89 ce e8 04 6c cc ff 44 89 f1 e9 3b fe ff ff e8 57 7c 92 ff 0f 0b e8 50 7c 92 ff <0f> 0b 66 2e 0f 1f 84 00 00 00 00 00 0f 1f 40 00 55 48 89 e5 41 57 RSP: 0018:ffffc900032be860 EFLAGS: 00010293 RAX: ffffffff81d116b0 RBX: 0000000000000060 RCX: ffff88810d343b40 RDX: 0000000000000000 RSI: 0000000000000060 RDI: 0000000000000000 RBP: ffffc900032be9b0 R08: 0000000000000004 R09: 0000000000000003 R10: fffff52000657d28 R11: 1ffff92000657d28 R12: dffffc0000000000 R13: 000000000000001f R14: 000000000000001f R15: ffff888123540498 FS: 00007f05046bb6c0(0000) GS:ffff8881f7000000(0000) knlGS:0000000000000000 CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033 CR2: 00007f10126aa254 CR3: 000000011a21e000 CR4: 00000000003506b0 DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000 DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400