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kernel BUG at fs/f2fs/segment.c:2809!
Oops: invalid opcode: 0000 [#1] PREEMPT SMP KASAN NOPTI
CPU: 0 UID: 0 PID: 5323 Comm: syz.0.0 Not tainted 6.14.0-rc5-syzkaller-00214-g21e4543a2e2f #0
Hardware name: QEMU Standard PC (Q35 + ICH9, 2009), BIOS 1.16.3-debian-1.16.3-2~bpo12+1 04/01/2014
RIP: 0010:get_new_segment fs/f2fs/segment.c:2809 [inline]
RIP: 0010:new_curseg+0x1f52/0x1f70 fs/f2fs/segment.c:2939
Code: f2 fd e9 1a fa ff ff 89 d9 80 e1 07 80 c1 03 38 c1 0f 8c 4c fa ff ff 48 89 df e8 f9 ef f2 fd e9 3f fa ff ff e8 1f b4 8b fd 90 <0f> 0b e8 17 b4 8b fd 90 0f 0b e8 0f b4 8b fd 90 0f 0b e8 07 b4 8b
RSP: 0018:ffffc9000d3bf4a8 EFLAGS: 00010293
RAX: ffffffff84362ad1 RBX: 0000000000000018 RCX: ffff888000fa4880
RDX: 0000000000000000 RSI: 0000000000000018 RDI: 0000000000000018
RBP: dffffc0000000000 R08: ffffffff84361905 R09: fffff52001a77e84
R10: dffffc0000000000 R11: fffff52001a77e84 R12: 0000000000000018
R13: ffff888042719101 R14: 0000000000000018 R15: ffff888040ee1ad8
FS:  00007f9c761d46c0(0000) GS:ffff88801fc00000(0000) knlGS:0000000000000000
CS:  0010 DS: 0000 ES: 0000 CR0: 0000000080050033
CR2: 0000400000001240 CR3: 00000000427b2000 CR4: 0000000000352ef0
DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000
DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400
Call Trace:
 <TASK>
 __allocate_new_segment+0x1ce/0x940 fs/f2fs/segment.c:3273
 f2fs_allocate_new_section fs/f2fs/segment.c:3287 [inline]
 f2fs_allocate_pinning_section+0xfa/0x4e0 fs/f2fs/segment.c:3301
 f2fs_expand_inode_data+0x696/0xca0 fs/f2fs/file.c:1849
 f2fs_fallocate+0x537/0xa10 fs/f2fs/file.c:1959
 vfs_fallocate+0x623/0x7a0 fs/open.c:338
 do_vfs_ioctl+0x2096/0x2770 fs/ioctl.c:885
 __do_sys_ioctl fs/ioctl.c:904 [inline]
 __se_sys_ioctl+0x80/0x170 fs/ioctl.c:892
 do_syscall_x64 arch/x86/entry/common.c:52 [inline]
 do_syscall_64+0xf3/0x230 arch/x86/entry/common.c:83
 entry_SYSCALL_64_after_hwframe+0x77/0x7f
RIP: 0033:0x7f9c79d8d169
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:00007f9c761d4038 EFLAGS: 00000246 ORIG_RAX: 0000000000000010
RAX: ffffffffffffffda RBX: 00007f9c79fa6080 RCX: 00007f9c79d8d169
RDX: 00004000000000c0 RSI: 0000000040305828 RDI: 0000000000000088
RBP: 00007f9c79e0e2a0 R08: 0000000000000000 R09: 0000000000000000
R10: 0000000000000000 R11: 0000000000000246 R12: 0000000000000000
R13: 0000000000000000 R14: 00007f9c79fa6080 R15: 00007ffc3cfbf908
 </TASK>
Modules linked in:
---[ end trace 0000000000000000 ]---
RIP: 0010:get_new_segment fs/f2fs/segment.c:2809 [inline]
RIP: 0010:new_curseg+0x1f52/0x1f70 fs/f2fs/segment.c:2939
Code: f2 fd e9 1a fa ff ff 89 d9 80 e1 07 80 c1 03 38 c1 0f 8c 4c fa ff ff 48 89 df e8 f9 ef f2 fd e9 3f fa ff ff e8 1f b4 8b fd 90 <0f> 0b e8 17 b4 8b fd 90 0f 0b e8 0f b4 8b fd 90 0f 0b e8 07 b4 8b
RSP: 0018:ffffc9000d3bf4a8 EFLAGS: 00010293
RAX: ffffffff84362ad1 RBX: 0000000000000018 RCX: ffff888000fa4880
RDX: 0000000000000000 RSI: 0000000000000018 RDI: 0000000000000018
RBP: dffffc0000000000 R08: ffffffff84361905 R09: fffff52001a77e84
R10: dffffc0000000000 R11: fffff52001a77e84 R12: 0000000000000018
R13: ffff888042719101 R14: 0000000000000018 R15: ffff888040ee1ad8
FS:  00007f9c761d46c0(0000) GS:ffff88801fc00000(0000) knlGS:0000000000000000
CS:  0010 DS: 0000 ES: 0000 CR0: 0000000080050033
CR2: 0000400000001240 CR3: 00000000427b2000 CR4: 0000000000352ef0
DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000
DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400