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: writeback. ================================================================== BUG: KASAN: out-of-bounds in ext4_xattr_set_entry+0x8e9/0x1e20 fs/ext4/xattr.c:1773 Read of size 18446744073709551572 at addr ffff8880526a8850 by task syz.0.0/5340 CPU: 0 UID: 0 PID: 5340 Comm: syz.0.0 Not tainted 6.16.0-syzkaller-04405-g4b290aae788e #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:378 [inline] print_report+0xca/0x240 mm/kasan/report.c:482 kasan_report+0x118/0x150 mm/kasan/report.c:595 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:6301 ext4_try_to_expand_extra_isize fs/ext4/inode.c:6344 [inline] __ext4_mark_inode_dirty+0x46c/0x700 fs/ext4/inode.c:6422 ext4_dirty_inode+0xd0/0x110 fs/ext4/inode.c:6454 __mark_inode_dirty+0x2ce/0xdf0 fs/fs-writeback.c:2527 mark_inode_dirty include/linux/fs.h:2607 [inline] ext4_setattr+0xabc/0x1bc0 fs/ext4/inode.c:5966 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: 0033:0x7f288858e9a9 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:00007f28894e3038 EFLAGS: 00000246 ORIG_RAX: 0000000000000084 RAX: ffffffffffffffda RBX: 00007f28887b5fa0 RCX: 00007f288858e9a9 RDX: 0000000000000000 RSI: 0000000000000000 RDI: 0000200000006a80 RBP: 00007f2888610d69 R08: 0000000000000000 R09: 0000000000000000 R10: 0000000000000000 R11: 0000000000000246 R12: 0000000000000000 R13: 0000000000000000 R14: 00007f28887b5fa0 R15: 00007ffd33af3bb8 Allocated by task 5340: 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:6301 ext4_try_to_expand_extra_isize fs/ext4/inode.c:6344 [inline] __ext4_mark_inode_dirty+0x46c/0x700 fs/ext4/inode.c:6422 ext4_dirty_inode+0xd0/0x110 fs/ext4/inode.c:6454 __mark_inode_dirty+0x2ce/0xdf0 fs/fs-writeback.c:2527 mark_inode_dirty include/linux/fs.h:2607 [inline] ext4_setattr+0xabc/0x1bc0 fs/ext4/inode.c:5966 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 ffff8880526a8800 which belongs to the cache kmalloc-1k of size 1024 The buggy address is located 80 bytes inside of 1024-byte region [ffff8880526a8800, ffff8880526a8c00) The buggy address belongs to the physical page: page: refcount:0 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0x526a8 head: order:2 mapcount:0 entire_mapcount:0 nr_pages_mapped:0 pincount:0 flags: 0x4fff00000000040(head|node=1|zone=1|lastcpupid=0x7ff) page_type: f5(slab) raw: 04fff00000000040 ffff88801a441dc0 dead000000000122 0000000000000000 raw: 0000000000000000 0000000080080008 00000000f5000000 0000000000000000 head: 04fff00000000040 ffff88801a441dc0 dead000000000122 0000000000000000 head: 0000000000000000 0000000080080008 00000000f5000000 0000000000000000 head: 04fff00000000002 ffffea000149aa01 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 0xd20c0(__GFP_IO|__GFP_FS|__GFP_NOWARN|__GFP_NORETRY|__GFP_COMP|__GFP_NOMEMALLOC), pid 5340, tgid 5339 (syz.0.0), ts 88619331663, free_ts 88617652254 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_frozen_pages_noprof+0x181/0x370 mm/page_alloc.c:4959 alloc_pages_mpol+0x232/0x4a0 mm/mempolicy.c:2419 alloc_slab_page mm/slub.c:2451 [inline] allocate_slab+0x8a/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] __kmalloc_cache_noprof+0x296/0x3d0 mm/slub.c:4354 kmalloc_noprof include/linux/slab.h:905 [inline] kzalloc_noprof include/linux/slab.h:1039 [inline] autofs_alloc_sbi fs/autofs/inode.c:245 [inline] autofs_init_fs_context+0x142/0x4b0 fs/autofs/inode.c:414 alloc_fs_context+0x651/0x7d0 fs/fs_context.c:318 __do_sys_fsopen fs/fsopen.c:136 [inline] __se_sys_fsopen+0xa5/0x2b0 fs/fsopen.c:114 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 page last free pid 5340 tgid 5339 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 stack_depot_save_flags+0x445/0x900 lib/stackdepot.c:678 kasan_save_stack mm/kasan/common.c:48 [inline] kasan_save_track+0x4f/0x80 mm/kasan/common.c:68 unpoison_slab_object mm/kasan/common.c:319 [inline] __kasan_slab_alloc+0x6c/0x80 mm/kasan/common.c:345 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] kmem_cache_alloc_noprof+0x1c1/0x3c0 mm/slub.c:4204 create_nsproxy kernel/nsproxy.c:56 [inline] create_new_namespaces+0x31/0x720 kernel/nsproxy.c:74 prepare_nsset kernel/nsproxy.c:325 [inline] __do_sys_setns kernel/nsproxy.c:559 [inline] __se_sys_setns+0x2dc/0x17a0 kernel/nsproxy.c:536 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 Memory state around the buggy address: ffff8880526a8700: fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc ffff8880526a8780: fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc >ffff8880526a8800: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 ^ ffff8880526a8880: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 ffff8880526a8900: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 ==================================================================