loop5: detected capacity change from 0 to 32768 ================================================================== BUG: KASAN: slab-out-of-bounds in reiserfs_xattr_get+0xe6/0x570 fs/reiserfs/xattr.c:676 Read of size 8 at addr ffff888029e03198 by task syz-executor.5/11010 CPU: 0 PID: 11010 Comm: syz-executor.5 Not tainted 6.5.0-syzkaller-11704-g3f86ed6ec0b3 #0 Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 07/26/2023 Call Trace: __dump_stack lib/dump_stack.c:88 [inline] dump_stack_lvl+0x1e7/0x2d0 lib/dump_stack.c:106 print_address_description mm/kasan/report.c:364 [inline] print_report+0x163/0x540 mm/kasan/report.c:475 kasan_report+0x175/0x1b0 mm/kasan/report.c:588 reiserfs_xattr_get+0xe6/0x570 fs/reiserfs/xattr.c:676 reiserfs_get_acl+0x7e/0x650 fs/reiserfs/xattr_acl.c:215 __get_acl+0x288/0x470 fs/posix_acl.c:160 check_acl+0x3a/0x150 fs/namei.c:309 acl_permission_check fs/namei.c:354 [inline] generic_permission+0x362/0x550 fs/namei.c:407 do_inode_permission fs/namei.c:461 [inline] inode_permission+0x233/0x460 fs/namei.c:528 may_open+0x2d6/0x440 fs/namei.c:3267 do_open fs/namei.c:3637 [inline] path_openat+0x265a/0x3180 fs/namei.c:3796 do_filp_open+0x234/0x490 fs/namei.c:3823 do_sys_openat2+0x13e/0x1d0 fs/open.c:1422 do_sys_open fs/open.c:1437 [inline] __do_sys_openat fs/open.c:1453 [inline] __se_sys_openat fs/open.c:1448 [inline] __x64_sys_openat+0x247/0x290 fs/open.c:1448 do_syscall_x64 arch/x86/entry/common.c:50 [inline] do_syscall_64+0x41/0xc0 arch/x86/entry/common.c:80 entry_SYSCALL_64_after_hwframe+0x63/0xcd RIP: 0033:0x7f2869a7b6e0 Code: 48 89 44 24 20 75 93 44 89 54 24 0c e8 09 82 02 00 44 8b 54 24 0c 89 da 48 89 ee 41 89 c0 bf 9c ff ff ff b8 01 01 00 00 0f 05 <48> 3d 00 f0 ff ff 77 38 44 89 c7 89 44 24 0c e8 5c 82 02 00 8b 44 RSP: 002b:00007f286a87ee70 EFLAGS: 00000293 ORIG_RAX: 0000000000000101 RAX: ffffffffffffffda RBX: 0000000000010000 RCX: 00007f2869a7b6e0 RDX: 0000000000010000 RSI: 0000000020000280 RDI: 00000000ffffff9c RBP: 0000000020000280 R08: 0000000000000000 R09: 0000000002008082 R10: 0000000000000000 R11: 0000000000000293 R12: 0000000020000280 R13: 00007f286a87ef40 R14: 0000000000005f43 R15: 00000000200001c0 Allocated by task 8623: kasan_save_stack mm/kasan/common.c:45 [inline] kasan_set_track+0x4f/0x70 mm/kasan/common.c:52 ____kasan_kmalloc mm/kasan/common.c:374 [inline] __kasan_kmalloc+0x98/0xb0 mm/kasan/common.c:383 kmalloc include/linux/slab.h:599 [inline] kzalloc include/linux/slab.h:720 [inline] smk_fetch+0x92/0x140 security/smack/smack_lsm.c:300 smack_d_instantiate+0x74a/0xa50 security/smack/smack_lsm.c:3573 security_d_instantiate+0x9b/0xf0 security/security.c:3799 d_instantiate+0x55/0x90 fs/dcache.c:2033 shmem_symlink+0x56c/0x6a0 mm/shmem.c:3493 vfs_symlink+0x12f/0x2a0 fs/namei.c:4480 do_symlinkat+0x201/0x610 fs/namei.c:4506 __do_sys_symlink fs/namei.c:4527 [inline] __se_sys_symlink fs/namei.c:4525 [inline] __x64_sys_symlink+0x7e/0x90 fs/namei.c:4525 do_syscall_x64 arch/x86/entry/common.c:50 [inline] do_syscall_64+0x41/0xc0 arch/x86/entry/common.c:80 entry_SYSCALL_64_after_hwframe+0x63/0xcd Freed by task 8623: kasan_save_stack mm/kasan/common.c:45 [inline] kasan_set_track+0x4f/0x70 mm/kasan/common.c:52 kasan_save_free_info+0x28/0x40 mm/kasan/generic.c:522 ____kasan_slab_free+0xd6/0x120 mm/kasan/common.c:236 kasan_slab_free include/linux/kasan.h:162 [inline] slab_free_hook mm/slub.c:1800 [inline] slab_free_freelist_hook mm/slub.c:1826 [inline] slab_free mm/slub.c:3809 [inline] __kmem_cache_free+0x25f/0x3b0 mm/slub.c:3822 smk_fetch+0x109/0x140 security/smack/smack_lsm.c:312 smack_d_instantiate+0x74a/0xa50 security/smack/smack_lsm.c:3573 security_d_instantiate+0x9b/0xf0 security/security.c:3799 d_instantiate+0x55/0x90 fs/dcache.c:2033 shmem_symlink+0x56c/0x6a0 mm/shmem.c:3493 vfs_symlink+0x12f/0x2a0 fs/namei.c:4480 do_symlinkat+0x201/0x610 fs/namei.c:4506 __do_sys_symlink fs/namei.c:4527 [inline] __se_sys_symlink fs/namei.c:4525 [inline] __x64_sys_symlink+0x7e/0x90 fs/namei.c:4525 do_syscall_x64 arch/x86/entry/common.c:50 [inline] do_syscall_64+0x41/0xc0 arch/x86/entry/common.c:80 entry_SYSCALL_64_after_hwframe+0x63/0xcd The buggy address belongs to the object at ffff888029e03000 which belongs to the cache kmalloc-256 of size 256 The buggy address is located 152 bytes to the right of allocated 256-byte region [ffff888029e03000, ffff888029e03100) The buggy address belongs to the physical page: page:ffffea0000a78080 refcount:1 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0x29e02 head:ffffea0000a78080 order:1 entire_mapcount:0 nr_pages_mapped:0 pincount:0 flags: 0xfff00000000840(slab|head|node=0|zone=1|lastcpupid=0x7ff) page_type: 0xffffffff() raw: 00fff00000000840 ffff888012841b40 ffffea0000a85100 dead000000000004 raw: 0000000000000000 0000000000100010 00000001ffffffff 0000000000000000 page dumped because: kasan: bad access detected page_owner tracks the page as allocated page last allocated via order 1, migratetype Unmovable, gfp_mask 0xd2040(__GFP_IO|__GFP_NOWARN|__GFP_NORETRY|__GFP_COMP|__GFP_NOMEMALLOC), pid 1, tgid 1 (init), ts 15851524959, free_ts 12647697915 set_page_owner include/linux/page_owner.h:31 [inline] post_alloc_hook+0x1e6/0x210 mm/page_alloc.c:1536 prep_new_page mm/page_alloc.c:1543 [inline] get_page_from_freelist+0x31ec/0x3370 mm/page_alloc.c:3183 __alloc_pages+0x255/0x670 mm/page_alloc.c:4439 alloc_slab_page+0x6a/0x160 mm/slub.c:1870 allocate_slab mm/slub.c:2017 [inline] new_slab+0x84/0x2f0 mm/slub.c:2070 ___slab_alloc+0xade/0x1100 mm/slub.c:3223 __slab_alloc mm/slub.c:3322 [inline] __slab_alloc_node mm/slub.c:3375 [inline] slab_alloc_node mm/slub.c:3468 [inline] __kmem_cache_alloc_node+0x1af/0x270 mm/slub.c:3517 kmalloc_trace+0x2a/0xe0 mm/slab_common.c:1114 kmalloc include/linux/slab.h:599 [inline] kzalloc include/linux/slab.h:720 [inline] smk_fetch+0x92/0x140 security/smack/smack_lsm.c:300 smack_d_instantiate+0x74a/0xa50 security/smack/smack_lsm.c:3573 security_d_instantiate+0x9b/0xf0 security/security.c:3799 d_splice_alias+0x6f/0x330 fs/dcache.c:3145 ext4_lookup+0x284/0x750 fs/ext4/namei.c:1879 __lookup_slow+0x282/0x3e0 fs/namei.c:1693 lookup_slow+0x53/0x70 fs/namei.c:1710 walk_component fs/namei.c:2001 [inline] link_path_walk+0x9c8/0xe70 fs/namei.c:2328 page last free stack trace: reset_page_owner include/linux/page_owner.h:24 [inline] free_pages_prepare mm/page_alloc.c:1136 [inline] free_unref_page_prepare+0x8c3/0x9f0 mm/page_alloc.c:2312 free_unref_page+0x37/0x3f0 mm/page_alloc.c:2405 kasan_depopulate_vmalloc_pte+0x74/0x90 mm/kasan/shadow.c:427 apply_to_pte_range mm/memory.c:2586 [inline] apply_to_pmd_range mm/memory.c:2630 [inline] apply_to_pud_range mm/memory.c:2666 [inline] apply_to_p4d_range mm/memory.c:2702 [inline] __apply_to_page_range+0x8e2/0xdf0 mm/memory.c:2736 kasan_release_vmalloc+0x9a/0xb0 mm/kasan/shadow.c:544 __purge_vmap_area_lazy+0xc0f/0x19c0 mm/vmalloc.c:1770 drain_vmap_area_work+0x40/0xd0 mm/vmalloc.c:1804 process_one_work+0x781/0x1130 kernel/workqueue.c:2630 process_scheduled_works kernel/workqueue.c:2703 [inline] worker_thread+0xabf/0x1060 kernel/workqueue.c:2784 kthread+0x2b8/0x350 kernel/kthread.c:388 ret_from_fork+0x48/0x80 arch/x86/kernel/process.c:147 ret_from_fork_asm+0x11/0x20 arch/x86/entry/entry_64.S:304 Memory state around the buggy address: ffff888029e03080: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb ffff888029e03100: fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc >ffff888029e03180: fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc ^ ffff888029e03200: fa fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb ffff888029e03280: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb ==================================================================