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BUG: KASAN: null-ptr-deref in xlog_cil_alloc_shadow_bufs fs/xfs/xfs_log_cil.c:225 [inline]
BUG: KASAN: null-ptr-deref in xlog_cil_commit+0x2d8/0x2050 fs/xfs/xfs_log_cil.c:1264
Write of size 88 at addr 0000000000000000 by task syz.1.2944/18782

CPU: 0 PID: 18782 Comm: syz.1.2944 Not tainted syzkaller #0
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 02/12/2026
Call Trace:
 <TASK>
 dump_stack_lvl+0x188/0x250 lib/dump_stack.c:106
 __kasan_report mm/kasan/report.c:438 [inline]
 kasan_report+0xd5/0x130 mm/kasan/report.c:451
 check_region_inline mm/kasan/generic.c:-1 [inline]
 kasan_check_range+0x235/0x290 mm/kasan/generic.c:189
 memset+0x1e/0x40 mm/kasan/shadow.c:44
 xlog_cil_alloc_shadow_bufs fs/xfs/xfs_log_cil.c:225 [inline]
 xlog_cil_commit+0x2d8/0x2050 fs/xfs/xfs_log_cil.c:1264
 __xfs_trans_commit+0x6b4/0xc60 fs/xfs/xfs_trans.c:881
 xfs_vn_update_time+0x3a0/0x520 fs/xfs/xfs_iops.c:1072
 inode_update_time fs/inode.c:1893 [inline]
 file_update_time+0x3a6/0x440 fs/inode.c:2083
 xfs_file_write_checks+0x926/0xae0 fs/xfs/xfs_file.c:446
 xfs_file_dio_write_aligned+0x146/0x270 fs/xfs/xfs_file.c:555
 xfs_file_dio_write fs/xfs/xfs_file.c:681 [inline]
 xfs_file_write_iter+0x4f6/0x610 fs/xfs/xfs_file.c:828
 call_write_iter include/linux/fs.h:2173 [inline]
 new_sync_write fs/read_write.c:507 [inline]
 vfs_write+0x745/0xd60 fs/read_write.c:594
 ksys_write+0x152/0x260 fs/read_write.c:647
 do_syscall_x64 arch/x86/entry/common.c:50 [inline]
 do_syscall_64+0x4c/0xa0 arch/x86/entry/common.c:80
 entry_SYSCALL_64_after_hwframe+0x66/0xd0
RIP: 0033:0x7f88784d3629
Code: ff c3 66 2e 0f 1f 84 00 00 00 00 00 0f 1f 44 00 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 e8 ff ff ff f7 d8 64 89 01 48
RSP: 002b:00007f887672d028 EFLAGS: 00000246 ORIG_RAX: 0000000000000001
RAX: ffffffffffffffda RBX: 00007f887874cfa0 RCX: 00007f88784d3629
RDX: 00000000ffffffd7 RSI: 0000200000000000 RDI: 0000000000000004
RBP: 00007f887672d090 R08: 0000000000000000 R09: 0000000000000000
R10: 0000000000000000 R11: 0000000000000246 R12: 0000000000000001
R13: 00007f887874d038 R14: 00007f887874cfa0 R15: 00007ffcd90ffe98
 </TASK>
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