R10: 0000000000008000 R11: 0000000000000246 R12: 0000000000000001 R13: 00007f4af7c4b038 R14: 00007f4af7c4afa0 R15: 00007fff26b7f138 ================================================================== 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.0.39/4445 CPU: 0 PID: 4445 Comm: syz.0.39 Not tainted syzkaller #0 Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 02/12/2026 Call Trace: 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_fallocate+0x250/0xb80 fs/xfs/xfs_file.c:956 vfs_fallocate+0x587/0x6f0 fs/open.c:308 ksys_fallocate fs/open.c:331 [inline] __do_sys_fallocate fs/open.c:339 [inline] __se_sys_fallocate fs/open.c:337 [inline] __x64_sys_fallocate+0xbd/0x100 fs/open.c:337 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: 0033:0x7f4af79d1799 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:00007f4af5c2b028 EFLAGS: 00000246 ORIG_RAX: 000000000000011d RAX: ffffffffffffffda RBX: 00007f4af7c4afa0 RCX: 00007f4af79d1799 RDX: 0000000000000000 RSI: 0000000000000008 RDI: 0000000000000004 RBP: 00007f4af5c2b090 R08: 0000000000000000 R09: 0000000000000000 R10: 0000000000008000 R11: 0000000000000246 R12: 0000000000000001 R13: 00007f4af7c4b038 R14: 00007f4af7c4afa0 R15: 00007fff26b7f138 ==================================================================