WARNING in udf_truncate

WARNING in udf_truncate_extents
Status: upstream: reported C repro on 2021/09/23 06:31
Reported-by: syzbot+5ae452fe5ed187a8d5f6@syzkaller.appspotmail.com
First crash: 73d, last: 38d

Fix bisection: failed (bisect log)

similar bugs (1):
Kernel	Title	Repro	Cause bisect	Fix bisect	Count	Last	Reported	Patched	Status
upstream	WARNING in udf_truncate_extents	syz	done	error	1	390d	419d	0/22	upstream: reported syz repro on 2020/10/12 13:20

Sample crash report:

UDF-fs: INFO Mounting volume 'LinuxUDF', timestamp 2020/09/19 18:44 (1000)
------------[ cut here ]------------
WARNING: CPU: 1 PID: 8108 at fs/udf/truncate.c:226 udf_truncate_extents.cold+0x11/0x18 fs/udf/truncate.c:226
Kernel panic - not syncing: panic_on_warn set ...

CPU: 1 PID: 8108 Comm: syz-executor169 Not tainted 4.19.208-syzkaller #0
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011
Call Trace:
 __dump_stack lib/dump_stack.c:77 [inline]
 dump_stack+0x1fc/0x2ef lib/dump_stack.c:118
 panic+0x26a/0x50e kernel/panic.c:186
 __warn.cold+0x20/0x5a kernel/panic.c:541
 report_bug+0x262/0x2b0 lib/bug.c:183
 fixup_bug arch/x86/kernel/traps.c:178 [inline]
 fixup_bug arch/x86/kernel/traps.c:173 [inline]
 do_error_trap+0x1d7/0x310 arch/x86/kernel/traps.c:296
 invalid_op+0x14/0x20 arch/x86/entry/entry_64.S:1038
RIP: 0010:udf_truncate_extents.cold+0x11/0x18 fs/udf/truncate.c:226
Code: 89 df 48 c7 c6 40 a9 9a 88 e8 ac f9 ff ff 41 bc ea ff ff ff e9 b6 6f 78 fa e8 f0 c4 69 f9 48 c7 c7 60 b4 9a 88 e8 0f db fa ff <0f> 0b e9 a1 90 78 fa e8 d8 c4 69 f9 48 c7 c6 40 ba 9a 88 48 c7 c7
RSP: 0018:ffff88809cbd7948 EFLAGS: 00010286
RAX: 0000000000000024 RBX: ffff88808d766670 RCX: 0000000000000000
RDX: 0000000000000000 RSI: ffffffff814dfe11 RDI: ffffed101397af1b
RBP: ffff88809cbd7a30 R08: 0000000000000024 R09: 0000000000000000
R10: 0000000000000005 R11: 0000000000000000 R12: ffff88809cbd79f0
R13: 0000000000000010 R14: 00000000000000ff R15: ffff8880b3380d00
 udf_write_failed.isra.0+0x17b/0x1d0 fs/udf/inode.c:172
 udf_write_begin+0x89/0xa0 fs/udf/inode.c:208
 generic_perform_write+0x1f8/0x4d0 mm/filemap.c:3170
 __generic_file_write_iter+0x24b/0x610 mm/filemap.c:3295
 udf_file_write_iter+0x2d4/0x4e0 fs/udf/file.c:169
 call_write_iter include/linux/fs.h:1821 [inline]
 new_sync_write fs/read_write.c:474 [inline]
 __vfs_write+0x51b/0x770 fs/read_write.c:487
 vfs_write+0x1f3/0x540 fs/read_write.c:549
 ksys_write+0x12b/0x2a0 fs/read_write.c:599
 do_syscall_64+0xf9/0x620 arch/x86/entry/common.c:293
 entry_SYSCALL_64_after_hwframe+0x49/0xbe
RIP: 0033:0x7f99044fa709
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 c0 ff ff ff f7 d8 64 89 01 48
RSP: 002b:00007ffc576cb218 EFLAGS: 00000246 ORIG_RAX: 0000000000000001
RAX: ffffffffffffffda RBX: 0000000000000000 RCX: 00007f99044fa709
RDX: 0000000000000878 RSI: 0000000020000a00 RDI: 0000000000000003
RBP: 00007f99044b9fa0 R08: 0000000000000d99 R09: 0000000000000000
R10: 0000000000000001 R11: 0000000000000246 R12: 00007f99044ba030
R13: 0000000000000000 R14: 0000000000000000 R15: 0000000000000000
Kernel Offset: disabled
Rebooting in 86400 seconds..

Crashes (9):
Manager	Time	Kernel	Commit	Syzkaller	Config	Log	Report	Syz repro	C repro	VM info	Title
ci2-linux-4-19	2021/10/04 21:05	linux-4.19.y	c2276d585654	ce697b49	.config	log	report	syz	C		WARNING in udf_truncate_extents
ci2-linux-4-19	2021/10/04 13:36	linux-4.19.y	c2276d585654	ce697b49	.config	log	report	syz	C		WARNING in udf_truncate_extents
ci2-linux-4-19	2021/10/04 02:16	linux-4.19.y	c2276d585654	db0f5787	.config	log	report	syz	C		WARNING in udf_truncate_extents
ci2-linux-4-19	2021/09/24 20:14	linux-4.19.y	2950c9c5e0df	8cac236e	.config	log	report	syz			WARNING in udf_truncate_extents
ci2-linux-4-19	2021/09/23 06:31	linux-4.19.y	2950c9c5e0df	8cac236e	.config	log	report	syz			WARNING in udf_truncate_extents
ci2-linux-4-19	2021/10/28 22:42	linux-4.19.y	3f8a27f9e27b	be531bb4	.config	log	report			info	WARNING in udf_truncate_extents
ci2-linux-4-19	2021/10/28 17:56	linux-4.19.y	3f8a27f9e27b	be531bb4	.config	log	report			info	WARNING in udf_truncate_extents
ci2-linux-4-19	2021/10/28 08:27	linux-4.19.y	3f8a27f9e27b	be531bb4	.config	log	report			info	WARNING in udf_truncate_extents
ci2-linux-4-19	2021/10/04 01:40	linux-4.19.y	c2276d585654	db0f5787	.config	log	report			info	WARNING in udf_truncate_extents