EXT4-fs (loop1): encrypted files will use data=ordered instead of data journaling mode
EXT4-fs (loop1): 1 truncate cleaned up
EXT4-fs (loop1): mounted filesystem without journal. Quota mode: none.
------------[ cut here ]------------
kernel BUG at fs/ext4/mballoc.c:4849!
invalid opcode: 0000 [#1] PREEMPT SMP KASAN
CPU: 0 PID: 10538 Comm: syz.1.1335 Not tainted syzkaller #0
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 08/18/2025
RIP: 0010:ext4_mb_release_inode_pa+0xaa4/0xab0 fs/ext4/mballoc.c:4849
Code: 80 c2 03 38 c2 0f 8c 3a fe ff ff 48 89 df 41 89 ce e8 f0 56 ab ff 44 89 f1 e9 27 fe ff ff e8 d3 29 5b ff 0f 0b e8 cc 29 5b ff <0f> 0b 66 2e 0f 1f 84 00 00 00 00 00 55 41 57 41 56 53 48 89 fb 49
RSP: 0018:ffffc90006016d20 EFLAGS: 00010283
RAX: ffffffff8225a524 RBX: 000000000000000c RCX: 0000000000080000
RDX: ffffc90005589000 RSI: 00000000000357f1 RDI: 00000000000357f2
RBP: ffffc90006016e70 R08: dffffc0000000000 R09: ffffed100e24973c
R10: ffffed100e24973c R11: 1ffff1100e24973b R12: dffffc0000000000
R13: ffff888053628cb0 R14: 0000000000000000 R15: 0000000000000eb5
FS:  00007fec357bd6c0(0000) GS:ffff8880b8e00000(0000) knlGS:0000000000000000
CS:  0010 DS: 0000 ES: 0000 CR0: 0000000080050033
CR2: 00007fead6459eb8 CR3: 000000005ddca000 CR4: 00000000003506f0
DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000
DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400
Call Trace:
 <TASK>
 ext4_mb_discard_group_preallocations+0xb62/0xdc0 fs/ext4/mballoc.c:4995
 ext4_mb_discard_preallocations fs/ext4/mballoc.c:5564 [inline]
 ext4_mb_discard_preallocations_should_retry+0x1f2/0x710 fs/ext4/mballoc.c:5585
 ext4_mb_new_blocks+0x3329/0x4720 fs/ext4/mballoc.c:5788
 ext4_alloc_branch fs/ext4/indirect.c:340 [inline]
 ext4_ind_map_blocks+0xe2a/0x21d0 fs/ext4/indirect.c:635
 ext4_map_blocks+0x970/0x1b60 fs/ext4/inode.c:681
 _ext4_get_block+0x1d7/0x4e0 fs/ext4/inode.c:822
 ext4_block_write_begin+0x637/0x12f0 fs/ext4/inode.c:1124
 ext4_write_begin+0x624/0xf50 fs/ext4/ext4_jbd2.h:-1
 generic_perform_write+0x2db/0x560 mm/filemap.c:3846
 ext4_buffered_write_iter+0x11a/0x3e0 fs/ext4/file.c:285
 ext4_file_write_iter+0x1d6/0x16e0 fs/ext4/file.c:-1
 call_write_iter include/linux/fs.h:2265 [inline]
 new_sync_write fs/read_write.c:491 [inline]
 vfs_write+0x44c/0x960 fs/read_write.c:584
 ksys_pwrite64 fs/read_write.c:699 [inline]
 __do_sys_pwrite64 fs/read_write.c:709 [inline]
 __se_sys_pwrite64 fs/read_write.c:706 [inline]
 __x64_sys_pwrite64+0x191/0x220 fs/read_write.c:706
 do_syscall_x64 arch/x86/entry/common.c:51 [inline]
 do_syscall_64+0x4c/0xa0 arch/x86/entry/common.c:81
 entry_SYSCALL_64_after_hwframe+0x68/0xd2
RIP: 0033:0x7fec3498eec9
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:00007fec357bd038 EFLAGS: 00000246 ORIG_RAX: 0000000000000012
RAX: ffffffffffffffda RBX: 00007fec34be5fa0 RCX: 00007fec3498eec9
RDX: 00000000ffffff07 RSI: 0000200000000140 RDI: 0000000000000004
RBP: 00007fec34a11f91 R08: 0000000000000000 R09: 0000000000000000
R10: 0000000008000c61 R11: 0000000000000246 R12: 0000000000000000
R13: 00007fec34be6038 R14: 00007fec34be5fa0 R15: 00007fff6b611b98
 </TASK>
Modules linked in:
---[ end trace 0000000000000000 ]---
RIP: 0010:ext4_mb_release_inode_pa+0xaa4/0xab0 fs/ext4/mballoc.c:4849
Code: 80 c2 03 38 c2 0f 8c 3a fe ff ff 48 89 df 41 89 ce e8 f0 56 ab ff 44 89 f1 e9 27 fe ff ff e8 d3 29 5b ff 0f 0b e8 cc 29 5b ff <0f> 0b 66 2e 0f 1f 84 00 00 00 00 00 55 41 57 41 56 53 48 89 fb 49
RSP: 0018:ffffc90006016d20 EFLAGS: 00010283
RAX: ffffffff8225a524 RBX: 000000000000000c RCX: 0000000000080000
RDX: ffffc90005589000 RSI: 00000000000357f1 RDI: 00000000000357f2
RBP: ffffc90006016e70 R08: dffffc0000000000 R09: ffffed100e24973c
R10: ffffed100e24973c R11: 1ffff1100e24973b R12: dffffc0000000000
R13: ffff888053628cb0 R14: 0000000000000000 R15: 0000000000000eb5
FS:  00007fec357bd6c0(0000) GS:ffff8880b8e00000(0000) knlGS:0000000000000000
CS:  0010 DS: 0000 ES: 0000 CR0: 0000000080050033
CR2: 00007fead6459eb8 CR3: 000000005ddca000 CR4: 00000000003506f0
DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000
DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400