EXT4-fs (loop1): Warning: mounting with an experimental mount option 'dioread_nolock' for blocksize < PAGE_SIZE [EXT4 FS bs=1024, gc=1, bpg=131072, ipg=32, mo=e855c01c, mo2=0003] System zones: 0-1, 3-36 EXT4-fs (loop1): mounted filesystem without journal. Opts: grpquota,delalloc,resuid=0x0000000000000000,debug,dioread_nolock,bsddf,nomblk_io_submit,noauto_da_alloc,,errors=continue ================================================================== BUG: KASAN: slab-out-of-bounds in ext4_get_inode_usage+0x3a1/0x520 fs/ext4/xattr.c:817 Read of size 4 at addr ffff888119fd00f0 by task syz.1.271/1418 CPU: 1 PID: 1418 Comm: syz.1.271 Not tainted syzkaller #0 Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 04/18/2026 Call Trace: __dump_stack+0x21/0x24 lib/dump_stack.c:77 dump_stack_lvl+0x1a7/0x208 lib/dump_stack.c:118 print_address_description+0x7f/0x2c0 mm/kasan/report.c:248 __kasan_report mm/kasan/report.c:435 [inline] kasan_report+0xe2/0x130 mm/kasan/report.c:452 __asan_report_load4_noabort+0x14/0x20 mm/kasan/report_generic.c:308 ext4_get_inode_usage+0x3a1/0x520 fs/ext4/xattr.c:817 __dquot_transfer+0x192/0x20d0 fs/quota/dquot.c:2017 dquot_transfer+0x2f1/0x460 fs/quota/dquot.c:2169 ext4_setattr+0x715/0x1950 fs/ext4/inode.c:5577 notify_change+0xab3/0xe40 fs/attr.c:410 chown_common+0x335/0x500 fs/open.c:675 vfs_fchown fs/open.c:742 [inline] ksys_fchown+0xef/0x160 fs/open.c:753 __do_sys_fchown fs/open.c:761 [inline] __se_sys_fchown fs/open.c:759 [inline] __x64_sys_fchown+0x7a/0x90 fs/open.c:759 do_syscall_64+0x31/0x40 arch/x86/entry/common.c:46 entry_SYSCALL_64_after_hwframe+0x61/0xcb RIP: 0033:0x7eff05b1de59 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:00007eff04578028 EFLAGS: 00000246 ORIG_RAX: 000000000000005d RAX: ffffffffffffffda RBX: 00007eff05d96fa0 RCX: 00007eff05b1de59 RDX: 000000000000ee01 RSI: 0000000000000000 RDI: 0000000000000006 RBP: 00007eff05bb3d6f R08: 0000000000000000 R09: 0000000000000000 R10: 0000000000000000 R11: 0000000000000246 R12: 0000000000000000 R13: 00007eff05d97038 R14: 00007eff05d96fa0 R15: 00007fffb0b84438 Allocated by task 137: kasan_save_stack mm/kasan/common.c:38 [inline] kasan_set_track mm/kasan/common.c:45 [inline] set_alloc_info mm/kasan/common.c:430 [inline] __kasan_slab_alloc+0xbd/0xf0 mm/kasan/common.c:463 kasan_slab_alloc include/linux/kasan.h:244 [inline] slab_post_alloc_hook+0x5d/0x2f0 mm/slab.h:580 slab_alloc_node mm/slub.c:2952 [inline] slab_alloc mm/slub.c:2960 [inline] kmem_cache_alloc+0x162/0x2d0 mm/slub.c:2965 kmem_cache_zalloc include/linux/slab.h:657 [inline] lsm_inode_alloc security/security.c:556 [inline] security_inode_alloc+0x33/0x110 security/security.c:952 inode_init_always+0x70a/0x9b0 fs/inode.c:204 alloc_inode fs/inode.c:240 [inline] iget_locked+0x1d7/0x7d0 fs/inode.c:1275 __ext4_iget+0x2e3/0x44c0 fs/ext4/inode.c:4801 ext4_lookup+0x43c/0x8d0 fs/ext4/namei.c:1830 lookup_open fs/namei.c:3234 [inline] open_last_lookups fs/namei.c:3325 [inline] path_openat+0x1140/0x31c0 fs/namei.c:3514 do_filp_open+0x1e2/0x410 fs/namei.c:3544 do_sys_openat2+0x19f/0x750 fs/open.c:1219 do_sys_open fs/open.c:1235 [inline] __do_sys_openat fs/open.c:1251 [inline] __se_sys_openat fs/open.c:1246 [inline] __x64_sys_openat+0x136/0x160 fs/open.c:1246 do_syscall_64+0x31/0x40 arch/x86/entry/common.c:46 entry_SYSCALL_64_after_hwframe+0x61/0xcb The buggy address belongs to the object at ffff888119fd00b0 which belongs to the cache lsm_inode_cache of size 56 The buggy address is located 8 bytes to the right of 56-byte region [ffff888119fd00b0, ffff888119fd00e8) The buggy address belongs to the page: page:ffffea000467f400 refcount:1 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0x119fd0 flags: 0x4000000000000200(slab) raw: 4000000000000200 ffffea0004865900 0000001000000010 ffff888100189980 raw: 0000000000000000 00000000002e002e 00000001ffffffff 0000000000000000 page dumped because: kasan: bad access detected page_owner tracks the page as allocated page last allocated via order 0, migratetype Unmovable, gfp_mask 0x12c40(GFP_NOFS|__GFP_NOWARN|__GFP_NORETRY), pid 127, ts 9453862630, free_ts 0 set_page_owner include/linux/page_owner.h:35 [inline] post_alloc_hook mm/page_alloc.c:2456 [inline] prep_new_page+0x179/0x180 mm/page_alloc.c:2462 get_page_from_freelist+0x223b/0x23d0 mm/page_alloc.c:4254 __alloc_pages_nodemask+0x290/0x620 mm/page_alloc.c:5384 alloc_slab_page mm/slub.c:-1 [inline] allocate_slab mm/slub.c:1813 [inline] new_slab+0x84/0x3f0 mm/slub.c:1874 new_slab_objects mm/slub.c:2632 [inline] ___slab_alloc+0x2a6/0x450 mm/slub.c:2796 __slab_alloc+0x63/0xa0 mm/slub.c:2836 slab_alloc_node mm/slub.c:2918 [inline] slab_alloc mm/slub.c:2960 [inline] kmem_cache_alloc+0x1ac/0x2d0 mm/slub.c:2965 kmem_cache_zalloc include/linux/slab.h:657 [inline] lsm_inode_alloc security/security.c:556 [inline] security_inode_alloc+0x33/0x110 security/security.c:952 inode_init_always+0x70a/0x9b0 fs/inode.c:204 alloc_inode fs/inode.c:240 [inline] new_inode_pseudo+0x91/0x210 fs/inode.c:968 sock_alloc net/socket.c:574 [inline] __sock_create+0x12c/0x770 net/socket.c:1400 sock_create net/socket.c:1487 [inline] __sys_socket+0xec/0x190 net/socket.c:1529 __do_sys_socket net/socket.c:1538 [inline] __se_sys_socket net/socket.c:1536 [inline] __x64_sys_socket+0x7a/0x90 net/socket.c:1536 do_syscall_64+0x31/0x40 arch/x86/entry/common.c:46 entry_SYSCALL_64_after_hwframe+0x61/0xcb page_owner free stack trace missing Memory state around the buggy address: ffff888119fcff80: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 ffff888119fd0000: 00 00 00 00 00 00 00 fc fc fc fc 00 00 00 00 00 >ffff888119fd0080: 00 00 fc fc fc fc 00 00 00 00 00 00 00 fc fc fc ^ ffff888119fd0100: fc 00 00 00 00 00 00 00 fc fc fc fc 00 00 00 00 ffff888119fd0180: 00 00 00 fc fc fc fc 00 00 00 00 00 00 00 fc fc ================================================================== EXT4-fs error (device loop1): xattr_find_entry:297: inode #12: comm syz.1.271: corrupted xattr entries