loop0: detected capacity change from 0 to 512 EXT4-fs: Warning: mounting with data=journal disables delayed allocation, dioread_nolock, O_DIRECT and fast_commit support! EXT4-fs (loop0): encrypted files will use data=ordered instead of data journaling mode EXT4-fs warning (device loop0): ext4_expand_extra_isize_ea:2848: Unable to expand inode 15. Delete some EAs or run e2fsck. EXT4-fs (loop0): 1 truncate cleaned up EXT4-fs (loop0): mounted filesystem 00000000-0000-0000-0000-000000000000 r/w without journal. Quota mode: none. ================================================================== BUG: KASAN: out-of-bounds in ext4_xattr_set_entry+0x8e9/0x1e20 fs/ext4/xattr.c:1773 Read of size 18446744073709551572 at addr ffff888011984850 by task syz.0.0/5345 CPU: 0 UID: 0 PID: 5345 Comm: syz.0.0 Not tainted 6.16.0-rc3-syzkaller-00057-g92ca6c498a5e #0 PREEMPT(full) Hardware name: QEMU Standard PC (Q35 + ICH9, 2009), BIOS 1.16.3-debian-1.16.3-2~bpo12+1 04/01/2014 Call Trace: dump_stack_lvl+0x189/0x250 lib/dump_stack.c:120 print_address_description mm/kasan/report.c:408 [inline] print_report+0xd2/0x2b0 mm/kasan/report.c:521 kasan_report+0x118/0x150 mm/kasan/report.c:634 check_region_inline mm/kasan/generic.c:-1 [inline] kasan_check_range+0x2b0/0x2c0 mm/kasan/generic.c:189 __asan_memmove+0x29/0x70 mm/kasan/shadow.c:94 ext4_xattr_set_entry+0x8e9/0x1e20 fs/ext4/xattr.c:1773 ext4_xattr_block_set+0x872/0x2ac0 fs/ext4/xattr.c:2020 ext4_xattr_move_to_block fs/ext4/xattr.c:2659 [inline] ext4_xattr_make_inode_space fs/ext4/xattr.c:2734 [inline] ext4_expand_extra_isize_ea+0x12d5/0x1ea0 fs/ext4/xattr.c:2822 __ext4_expand_extra_isize+0x30d/0x400 fs/ext4/inode.c:6306 ext4_try_to_expand_extra_isize fs/ext4/inode.c:6349 [inline] __ext4_mark_inode_dirty+0x46c/0x700 fs/ext4/inode.c:6427 ext4_dirty_inode+0xd0/0x110 fs/ext4/inode.c:6459 __mark_inode_dirty+0x2d1/0xdf0 fs/fs-writeback.c:2527 mark_inode_dirty include/linux/fs.h:2598 [inline] ext4_setattr+0xabc/0x1bc0 fs/ext4/inode.c:5971 notify_change+0xb33/0xe40 fs/attr.c:552 vfs_utimes+0x3fb/0x570 fs/utimes.c:66 do_utimes_path fs/utimes.c:99 [inline] do_utimes+0x1bd/0x2a0 fs/utimes.c:140 __do_sys_utime fs/utimes.c:221 [inline] __se_sys_utime fs/utimes.c:210 [inline] __x64_sys_utime+0x13e/0x200 fs/utimes.c:210 do_syscall_x64 arch/x86/entry/syscall_64.c:63 [inline] do_syscall_64+0xfa/0x3b0 arch/x86/entry/syscall_64.c:94 entry_SYSCALL_64_after_hwframe+0x77/0x7f RIP: 0033:0x7f4fffb8e929 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:00007f500094b038 EFLAGS: 00000246 ORIG_RAX: 0000000000000084 RAX: ffffffffffffffda RBX: 00007f4fffdb5fa0 RCX: 00007f4fffb8e929 RDX: 0000000000000000 RSI: 0000000000000000 RDI: 0000200000006a80 RBP: 00007f4fffc10b39 R08: 0000000000000000 R09: 0000000000000000 R10: 0000000000000000 R11: 0000000000000246 R12: 0000000000000000 R13: 0000000000000000 R14: 00007f4fffdb5fa0 R15: 00007ffef7997748 Allocated by task 5345: kasan_save_stack mm/kasan/common.c:47 [inline] kasan_save_track+0x3e/0x80 mm/kasan/common.c:68 poison_kmalloc_redzone mm/kasan/common.c:377 [inline] __kasan_kmalloc+0x93/0xb0 mm/kasan/common.c:394 kasan_kmalloc include/linux/kasan.h:260 [inline] __do_kmalloc_node mm/slub.c:4328 [inline] __kmalloc_node_track_caller_noprof+0x271/0x4e0 mm/slub.c:4347 kmemdup_noprof+0x2b/0x70 mm/util.c:137 kmemdup_noprof include/linux/fortify-string.h:765 [inline] ext4_xattr_block_set+0x781/0x2ac0 fs/ext4/xattr.c:1968 ext4_xattr_move_to_block fs/ext4/xattr.c:2659 [inline] ext4_xattr_make_inode_space fs/ext4/xattr.c:2734 [inline] ext4_expand_extra_isize_ea+0x12d5/0x1ea0 fs/ext4/xattr.c:2822 __ext4_expand_extra_isize+0x30d/0x400 fs/ext4/inode.c:6306 ext4_try_to_expand_extra_isize fs/ext4/inode.c:6349 [inline] __ext4_mark_inode_dirty+0x46c/0x700 fs/ext4/inode.c:6427 ext4_dirty_inode+0xd0/0x110 fs/ext4/inode.c:6459 __mark_inode_dirty+0x2d1/0xdf0 fs/fs-writeback.c:2527 mark_inode_dirty include/linux/fs.h:2598 [inline] ext4_setattr+0xabc/0x1bc0 fs/ext4/inode.c:5971 notify_change+0xb33/0xe40 fs/attr.c:552 vfs_utimes+0x3fb/0x570 fs/utimes.c:66 do_utimes_path fs/utimes.c:99 [inline] do_utimes+0x1bd/0x2a0 fs/utimes.c:140 __do_sys_utime fs/utimes.c:221 [inline] __se_sys_utime fs/utimes.c:210 [inline] __x64_sys_utime+0x13e/0x200 fs/utimes.c:210 do_syscall_x64 arch/x86/entry/syscall_64.c:63 [inline] do_syscall_64+0xfa/0x3b0 arch/x86/entry/syscall_64.c:94 entry_SYSCALL_64_after_hwframe+0x77/0x7f The buggy address belongs to the object at ffff888011984800 which belongs to the cache kmalloc-1k of size 1024 The buggy address is located 80 bytes inside of 1024-byte region [ffff888011984800, ffff888011984c00) The buggy address belongs to the physical page: page: refcount:0 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0x11984 head: order:2 mapcount:0 entire_mapcount:0 nr_pages_mapped:0 pincount:0 flags: 0xfff00000000040(head|node=0|zone=1|lastcpupid=0x7ff) page_type: f5(slab) raw: 00fff00000000040 ffff88801a441dc0 dead000000000122 0000000000000000 raw: 0000000000000000 0000000080080008 00000000f5000000 0000000000000000 head: 00fff00000000040 ffff88801a441dc0 dead000000000122 0000000000000000 head: 0000000000000000 0000000080080008 00000000f5000000 0000000000000000 head: 00fff00000000002 ffffea0000466101 00000000ffffffff 00000000ffffffff head: ffffffffffffffff 0000000000000000 00000000ffffffff 0000000000000004 page dumped because: kasan: bad access detected page_owner tracks the page as allocated page last allocated via order 2, migratetype Unmovable, gfp_mask 0x252800(GFP_NOWAIT|__GFP_NORETRY|__GFP_COMP|__GFP_THISNODE), pid 5345, tgid 5344 (syz.0.0), ts 118195168482, free_ts 29073372064 set_page_owner include/linux/page_owner.h:32 [inline] post_alloc_hook+0x240/0x2a0 mm/page_alloc.c:1704 prep_new_page mm/page_alloc.c:1712 [inline] get_page_from_freelist+0x21e4/0x22c0 mm/page_alloc.c:3669 __alloc_pages_slowpath+0x2fe/0xce0 mm/page_alloc.c:4490 __alloc_frozen_pages_noprof+0x319/0x370 mm/page_alloc.c:4972 alloc_slab_page mm/slub.c:2453 [inline] allocate_slab+0x65/0x3b0 mm/slub.c:2619 new_slab mm/slub.c:2673 [inline] ___slab_alloc+0xbfc/0x1480 mm/slub.c:3859 __slab_alloc mm/slub.c:3949 [inline] __slab_alloc_node mm/slub.c:4024 [inline] slab_alloc_node mm/slub.c:4185 [inline] __do_kmalloc_node mm/slub.c:4327 [inline] __kmalloc_node_noprof+0x2fd/0x4e0 mm/slub.c:4334 kmalloc_array_node_noprof include/linux/slab.h:1020 [inline] alloc_slab_obj_exts+0x39/0xa0 mm/slub.c:1992 __memcg_slab_post_alloc_hook+0x31e/0x7f0 mm/memcontrol.c:3177 memcg_slab_post_alloc_hook mm/slub.c:2180 [inline] slab_post_alloc_hook mm/slub.c:4158 [inline] slab_alloc_node mm/slub.c:4197 [inline] __do_kmalloc_node mm/slub.c:4327 [inline] __kmalloc_node_track_caller_noprof+0x335/0x4e0 mm/slub.c:4347 __kmemdup_nul mm/util.c:63 [inline] kstrdup+0x42/0x100 mm/util.c:83 alloc_vfsmnt+0xeb/0x4e0 fs/namespace.c:359 vfs_create_mount+0x6c/0x3d0 fs/namespace.c:1268 do_new_mount_fc fs/namespace.c:3816 [inline] do_new_mount+0x35a/0xa40 fs/namespace.c:3887 do_mount fs/namespace.c:4222 [inline] __do_sys_mount fs/namespace.c:4433 [inline] __se_sys_mount+0x317/0x410 fs/namespace.c:4410 do_syscall_x64 arch/x86/entry/syscall_64.c:63 [inline] do_syscall_64+0xfa/0x3b0 arch/x86/entry/syscall_64.c:94 page last free pid 4723 tgid 4723 stack trace: reset_page_owner include/linux/page_owner.h:25 [inline] free_pages_prepare mm/page_alloc.c:1248 [inline] __free_frozen_pages+0xc71/0xe70 mm/page_alloc.c:2706 discard_slab mm/slub.c:2717 [inline] __put_partials+0x161/0x1c0 mm/slub.c:3186 put_cpu_partial+0x17c/0x250 mm/slub.c:3261 __slab_free+0x2f7/0x400 mm/slub.c:4513 qlink_free mm/kasan/quarantine.c:163 [inline] qlist_free_all+0x97/0x140 mm/kasan/quarantine.c:179 kasan_quarantine_reduce+0x148/0x160 mm/kasan/quarantine.c:286 __kasan_slab_alloc+0x22/0x80 mm/kasan/common.c:329 kasan_slab_alloc include/linux/kasan.h:250 [inline] slab_post_alloc_hook mm/slub.c:4148 [inline] slab_alloc_node mm/slub.c:4197 [inline] __kmalloc_cache_noprof+0x1be/0x3d0 mm/slub.c:4354 kmalloc_noprof include/linux/slab.h:905 [inline] kzalloc_noprof include/linux/slab.h:1039 [inline] kernfs_fop_open+0x397/0xca0 fs/kernfs/file.c:623 do_dentry_open+0xdf0/0x1970 fs/open.c:964 vfs_open+0x3b/0x340 fs/open.c:1094 do_open fs/namei.c:3896 [inline] path_openat+0x2ee5/0x3830 fs/namei.c:4055 do_filp_open+0x1fa/0x410 fs/namei.c:4082 do_sys_openat2+0x121/0x1c0 fs/open.c:1437 do_sys_open fs/open.c:1452 [inline] __do_sys_openat fs/open.c:1468 [inline] __se_sys_openat fs/open.c:1463 [inline] __x64_sys_openat+0x138/0x170 fs/open.c:1463 do_syscall_x64 arch/x86/entry/syscall_64.c:63 [inline] do_syscall_64+0xfa/0x3b0 arch/x86/entry/syscall_64.c:94 Memory state around the buggy address: ffff888011984700: fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc ffff888011984780: fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc >ffff888011984800: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 ^ ffff888011984880: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 ffff888011984900: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 ==================================================================