loop0: detected capacity change from 512 to 511 ================================================================== BUG: KASAN: out-of-bounds in ext4_xattr_set_entry+0x9c1/0x1e20 fs/ext4/xattr.c:1751 Read of size 18446744073709551600 at addr ffff888043639eb8 by task syz.0.0/5352 CPU: 0 UID: 0 PID: 5352 Comm: syz.0.0 Not tainted syzkaller #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+0x9c1/0x1e20 fs/ext4/xattr.c:1751 ext4_xattr_ibody_set+0x254/0x6a0 fs/ext4/xattr.c:2263 ext4_destroy_inline_data_nolock+0x214/0x5b0 fs/ext4/inline.c:463 ext4_convert_inline_data_to_extent+0x540/0xdd0 fs/ext4/inline.c:613 ext4_write_begin+0x382/0x19a0 fs/ext4/inode.c:1302 ext4_da_write_begin+0x445/0xda0 fs/ext4/inode.c:3129 generic_perform_write+0x2c2/0x900 mm/filemap.c:4175 ext4_buffered_write_iter+0xce/0x3a0 fs/ext4/file.c:299 ext4_file_write_iter+0x298/0x1bc0 fs/ext4/file.c:-1 new_sync_write fs/read_write.c:593 [inline] vfs_write+0x5c9/0xb30 fs/read_write.c:686 ksys_pwrite64 fs/read_write.c:793 [inline] __do_sys_pwrite64 fs/read_write.c:801 [inline] __se_sys_pwrite64 fs/read_write.c:798 [inline] __x64_sys_pwrite64+0x193/0x220 fs/read_write.c:798 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: 0033:0x7faa95f8ebe9 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:00007faa923d4038 EFLAGS: 00000246 ORIG_RAX: 0000000000000012 RAX: ffffffffffffffda RBX: 00007faa961b6090 RCX: 00007faa95f8ebe9 RDX: 0000000000000001 RSI: 0000200000000000 RDI: 0000000000000009 RBP: 00007faa96011e19 R08: 0000000000000000 R09: 0000000000000000 R10: 0000000000009000 R11: 0000000000000246 R12: 0000000000000000 R13: 00007faa961b6128 R14: 00007faa961b6090 R15: 00007ffc7e4225d8 The buggy address belongs to the physical page: page: refcount:2 mapcount:0 mapping:ffff88803202cd80 index:0x4 pfn:0x43639 memcg:ffff888030488000 aops:def_blk_aops ino:700000 dentry name(?):"" flags: 0x4fff38000004a3c(referenced|uptodate|dirty|lru|workingset|owner_2|private|node=1|zone=1|lastcpupid=0x7ff) raw: 04fff38000004a3c ffffea0001489f48 ffffea00010d8e08 ffff88803202cd80 raw: 0000000000000004 ffff8880444ff0e8 00000002ffffffff ffff888030488000 page dumped because: kasan: bad access detected page_owner tracks the page as allocated page last allocated via order 0, migratetype Unmovable, gfp_mask 0x152c40(GFP_NOFS|__GFP_NOWARN|__GFP_NORETRY|__GFP_COMP|__GFP_HARDWALL), pid 5326, tgid 5326 (udevd), ts 68033679420, free_ts 68030165977 set_page_owner include/linux/page_owner.h:32 [inline] post_alloc_hook+0x240/0x2a0 mm/page_alloc.c:1851 prep_new_page mm/page_alloc.c:1859 [inline] get_page_from_freelist+0x21e4/0x22c0 mm/page_alloc.c:3858 __alloc_frozen_pages_noprof+0x181/0x370 mm/page_alloc.c:5148 alloc_pages_mpol+0x232/0x4a0 mm/mempolicy.c:2416 alloc_frozen_pages_noprof mm/mempolicy.c:2487 [inline] alloc_pages_noprof+0xa9/0x190 mm/mempolicy.c:2507 folio_alloc_noprof+0x1e/0x30 mm/mempolicy.c:2517 filemap_alloc_folio_noprof+0xdf/0x470 mm/filemap.c:1007 ractl_alloc_folio mm/readahead.c:186 [inline] page_cache_ra_unbounded+0x2b9/0x7b0 mm/readahead.c:270 do_page_cache_ra mm/readahead.c:327 [inline] force_page_cache_ra mm/readahead.c:356 [inline] page_cache_sync_ra+0x3b9/0xb10 mm/readahead.c:572 filemap_get_pages+0x43c/0x1ea0 mm/filemap.c:2603 filemap_read+0x3f6/0x11a0 mm/filemap.c:2712 blkdev_read_iter+0x30a/0x440 block/fops.c:849 new_sync_read fs/read_write.c:491 [inline] vfs_read+0x557/0xa30 fs/read_write.c:572 ksys_read+0x145/0x250 fs/read_write.c:715 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 5326 tgid 5326 stack trace: reset_page_owner include/linux/page_owner.h:25 [inline] free_pages_prepare mm/page_alloc.c:1395 [inline] __free_frozen_pages+0xbc4/0xd30 mm/page_alloc.c:2895 __slab_free+0x303/0x3c0 mm/slub.c:4591 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:340 kasan_slab_alloc include/linux/kasan.h:250 [inline] slab_post_alloc_hook mm/slub.c:4180 [inline] slab_alloc_node mm/slub.c:4229 [inline] __do_kmalloc_node mm/slub.c:4364 [inline] __kvmalloc_node_noprof+0x2b0/0x5f0 mm/slub.c:5052 seq_buf_alloc fs/seq_file.c:38 [inline] seq_read_iter+0x1fd/0xe10 fs/seq_file.c:210 new_sync_read fs/read_write.c:491 [inline] vfs_read+0x557/0xa30 fs/read_write.c:572 ksys_read+0x145/0x250 fs/read_write.c:715 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: ffff888043639d80: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 ffff888043639e00: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 >ffff888043639e80: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 ^ ffff888043639f00: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 ffff888043639f80: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 ==================================================================