================================================================== 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+0x2c7/0x2010 fs/xfs/xfs_log_cil.c:1264 Write of size 88 at addr 0000000000000000 by task syz.0.21/4302 CPU: 1 PID: 4302 Comm: syz.0.21 Not tainted 5.15.181-syzkaller #0 Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 04/19/2025 Call Trace: dump_stack_lvl+0x168/0x230 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+0x27b/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+0x2c7/0x2010 fs/xfs/xfs_log_cil.c:1264 __xfs_trans_commit+0x6b2/0xc50 fs/xfs/xfs_trans.c:881 xfs_vn_update_time+0x39a/0x510 fs/xfs/xfs_iops.c:1072 inode_update_time fs/inode.c:1893 [inline] file_update_time+0x373/0x400 fs/inode.c:2083 xfs_file_write_checks+0x812/0xac0 fs/xfs/xfs_file.c:446 xfs_file_buffered_write+0x164/0x9a0 fs/xfs/xfs_file.c:745 call_write_iter include/linux/fs.h:2172 [inline] new_sync_write fs/read_write.c:507 [inline] vfs_write+0x712/0xd00 fs/read_write.c:594 ksys_write+0x14d/0x250 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: 0033:0x7fdad8766969 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:00007fdad65ce038 EFLAGS: 00000246 ORIG_RAX: 0000000000000001 RAX: ffffffffffffffda RBX: 00007fdad898dfa0 RCX: 00007fdad8766969 RDX: 0000000000010448 RSI: 0000000000000000 RDI: 0000000000000004 RBP: 00007fdad65ce090 R08: 0000000000000000 R09: 0000000000000000 R10: 0000000000000000 R11: 0000000000000246 R12: 0000000000000001 R13: 0000000000000000 R14: 00007fdad898dfa0 R15: 00007ffd8c06e3c8 ==================================================================