loop3: detected capacity change from 0 to 32768 ================================================================== BUG: KASAN: slab-out-of-bounds in reiserfs_xattr_get+0xe6/0x570 fs/reiserfs/xattr.c:674 Read of size 8 at addr ffff888020f2f198 by task syz-executor.3/25126 CPU: 0 PID: 25126 Comm: syz-executor.3 Not tainted 6.3.0-rc2-syzkaller-00387-g534293368afa #0 Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 03/02/2023 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:319 [inline] print_report+0x163/0x540 mm/kasan/report.c:430 kasan_report+0x176/0x1b0 mm/kasan/report.c:536 reiserfs_xattr_get+0xe6/0x570 fs/reiserfs/xattr.c:674 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:307 acl_permission_check fs/namei.c:352 [inline] generic_permission+0x362/0x550 fs/namei.c:405 do_inode_permission fs/namei.c:459 [inline] inode_permission+0x233/0x460 fs/namei.c:526 may_open+0x2d6/0x440 fs/namei.c:3188 do_open fs/namei.c:3558 [inline] path_openat+0x2652/0x3170 fs/namei.c:3715 do_filp_open+0x234/0x490 fs/namei.c:3742 do_sys_openat2+0x13f/0x500 fs/open.c:1348 do_sys_open fs/open.c:1364 [inline] __do_sys_openat fs/open.c:1380 [inline] __se_sys_openat fs/open.c:1375 [inline] __x64_sys_openat+0x247/0x290 fs/open.c:1375 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: 0033:0x7fe7d183e284 Code: 84 00 00 00 00 00 44 89 54 24 0c e8 96 f9 ff ff 44 8b 54 24 0c 44 89 e2 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 34 44 89 c7 89 44 24 0c e8 c8 f9 ff ff 8b 44 RSP: 002b:00007fe7d25aaf10 EFLAGS: 00000293 ORIG_RAX: 0000000000000101 RAX: ffffffffffffffda RBX: 0000000000005dcc RCX: 00007fe7d183e284 RDX: 0000000000010000 RSI: 0000000020005e40 RDI: 00000000ffffff9c RBP: 0000000020005e40 R08: 0000000000000000 R09: 0000000000000000 R10: 0000000000000000 R11: 0000000000000293 R12: 0000000000010000 R13: 0000000020005e40 R14: 00007fe7d25aafe0 R15: 0000000020000140 Allocated by task 25126: 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 kasan_kmalloc include/linux/kasan.h:196 [inline] __do_kmalloc_node mm/slab_common.c:967 [inline] __kmalloc+0xb9/0x230 mm/slab_common.c:980 kmalloc_array include/linux/slab.h:636 [inline] kcalloc include/linux/slab.h:667 [inline] __list_lru_init+0xaa/0x5e0 mm/list_lru.c:571 alloc_super+0x7b4/0x930 fs/super.c:272 sget+0x1fa/0x4d0 fs/super.c:655 mount_bdev+0xed/0x3a0 fs/super.c:1342 legacy_get_tree+0xef/0x190 fs/fs_context.c:610 vfs_get_tree+0x8c/0x270 fs/super.c:1501 do_new_mount+0x28f/0xae0 fs/namespace.c:3042 do_mount fs/namespace.c:3385 [inline] __do_sys_mount fs/namespace.c:3594 [inline] __se_sys_mount+0x2d9/0x3c0 fs/namespace.c:3571 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 ffff888020f2f000 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 [ffff888020f2f000, ffff888020f2f100) The buggy address belongs to the physical page: page:ffffea000083cb80 refcount:1 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0x20f2e head:ffffea000083cb80 order:1 entire_mapcount:0 nr_pages_mapped:0 pincount:0 anon flags: 0xfff00000010200(slab|head|node=0|zone=1|lastcpupid=0x7ff) raw: 00fff00000010200 ffff888012441b40 0000000000000000 dead000000000001 raw: 0000000000000000 0000000080100010 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 0x1d2040(__GFP_IO|__GFP_NOWARN|__GFP_NORETRY|__GFP_COMP|__GFP_NOMEMALLOC|__GFP_HARDWALL), pid 5232, tgid 5232 (syz-executor.1), ts 222449212262, free_ts 218613874218 prep_new_page mm/page_alloc.c:2552 [inline] get_page_from_freelist+0x3246/0x33c0 mm/page_alloc.c:4325 __alloc_pages+0x255/0x670 mm/page_alloc.c:5591 alloc_slab_page+0x6a/0x160 mm/slub.c:1851 allocate_slab mm/slub.c:1998 [inline] new_slab+0x84/0x2f0 mm/slub.c:2051 ___slab_alloc+0xa85/0x10a0 mm/slub.c:3193 __slab_alloc mm/slub.c:3292 [inline] __slab_alloc_node mm/slub.c:3345 [inline] slab_alloc_node mm/slub.c:3442 [inline] __kmem_cache_alloc_node+0x1b8/0x290 mm/slub.c:3491 kmalloc_trace+0x2a/0xe0 mm/slab_common.c:1061 kmalloc include/linux/slab.h:580 [inline] kzalloc include/linux/slab.h:720 [inline] smk_fetch+0x92/0x140 security/smack/smack_lsm.c:291 smack_d_instantiate+0x868/0xb40 security/smack/smack_lsm.c:3528 security_d_instantiate+0x9b/0xf0 security/security.c:2139 d_instantiate_new+0x65/0x120 fs/dcache.c:2053 ext4_add_nondir+0x22d/0x290 fs/ext4/namei.c:2776 ext4_symlink+0x908/0xb30 fs/ext4/namei.c:3410 vfs_symlink+0x12f/0x2a0 fs/namei.c:4398 do_symlinkat+0x201/0x610 fs/namei.c:4424 __do_sys_symlinkat fs/namei.c:4440 [inline] __se_sys_symlinkat fs/namei.c:4437 [inline] __x64_sys_symlinkat+0x99/0xb0 fs/namei.c:4437 page last free stack trace: reset_page_owner include/linux/page_owner.h:24 [inline] free_pages_prepare mm/page_alloc.c:1453 [inline] free_pcp_prepare mm/page_alloc.c:1503 [inline] free_unref_page_prepare+0xe2f/0xe70 mm/page_alloc.c:3387 free_unref_page+0x37/0x3f0 mm/page_alloc.c:3482 qlist_free_all+0x22/0x60 mm/kasan/quarantine.c:187 kasan_quarantine_reduce+0x14b/0x160 mm/kasan/quarantine.c:294 __kasan_slab_alloc+0x23/0x70 mm/kasan/common.c:305 kasan_slab_alloc include/linux/kasan.h:186 [inline] slab_post_alloc_hook+0x68/0x3a0 mm/slab.h:769 slab_alloc_node mm/slub.c:3452 [inline] kmem_cache_alloc_node+0x157/0x350 mm/slub.c:3497 __alloc_skb+0x181/0x420 net/core/skbuff.c:596 alloc_skb include/linux/skbuff.h:1277 [inline] alloc_skb_with_frags+0xa8/0x750 net/core/skbuff.c:6318 sock_alloc_send_pskb+0x919/0xa50 net/core/sock.c:2734 sock_alloc_send_skb include/net/sock.h:1860 [inline] mld_newpack+0x1c4/0xa90 net/ipv6/mcast.c:1748 add_grhead net/ipv6/mcast.c:1851 [inline] add_grec+0x148d/0x1990 net/ipv6/mcast.c:1989 mld_send_initial_cr+0x20f/0x3a0 net/ipv6/mcast.c:2236 ipv6_mc_dad_complete+0x88/0x390 net/ipv6/mcast.c:2247 addrconf_dad_completed+0x67c/0xca0 net/ipv6/addrconf.c:4233 addrconf_dad_work+0xd92/0x16b0 Memory state around the buggy address: ffff888020f2f080: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 ffff888020f2f100: fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc >ffff888020f2f180: fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc ^ ffff888020f2f200: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 ffff888020f2f280: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 ==================================================================