loop5: detected capacity change from 0 to 32768 ================================================================== BUG: KASAN: slab-out-of-bounds in reiserfs_xattr_get+0xe3/0x580 fs/reiserfs/xattr.c:674 Read of size 8 at addr ffff888077c9d398 by task syz-executor.5/23527 CPU: 0 PID: 23527 Comm: syz-executor.5 Not tainted 6.1.0-rc5-syzkaller-00144-g84368d882b96 #0 Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 10/26/2022 Call Trace: __dump_stack lib/dump_stack.c:88 [inline] dump_stack_lvl+0x1b1/0x28e lib/dump_stack.c:106 print_address_description+0x74/0x340 mm/kasan/report.c:284 print_report+0x107/0x1f0 mm/kasan/report.c:395 kasan_report+0xcd/0x100 mm/kasan/report.c:495 reiserfs_xattr_get+0xe3/0x580 fs/reiserfs/xattr.c:674 reiserfs_get_acl+0x7a/0x650 fs/reiserfs/xattr_acl.c:214 get_acl+0x157/0x260 fs/posix_acl.c:153 check_acl+0x35/0x150 fs/namei.c:306 acl_permission_check fs/namei.c:351 [inline] generic_permission+0x388/0x4e0 fs/namei.c:404 do_inode_permission fs/namei.c:458 [inline] inode_permission+0x22c/0x450 fs/namei.c:525 may_open+0x2a4/0x400 fs/namei.c:3185 do_open fs/namei.c:3555 [inline] path_openat+0x24a2/0x2df0 fs/namei.c:3713 do_filp_open+0x264/0x4f0 fs/namei.c:3740 do_sys_openat2+0x124/0x4e0 fs/open.c:1310 do_sys_open fs/open.c:1326 [inline] __do_sys_openat fs/open.c:1342 [inline] __se_sys_openat fs/open.c:1337 [inline] __x64_sys_openat+0x243/0x290 fs/open.c:1337 do_syscall_x64 arch/x86/entry/common.c:50 [inline] do_syscall_64+0x3d/0xb0 arch/x86/entry/common.c:80 entry_SYSCALL_64_after_hwframe+0x63/0xcd RIP: 0033:0x7f39e883d6e4 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:00007f39e9545f10 EFLAGS: 00000293 ORIG_RAX: 0000000000000101 RAX: ffffffffffffffda RBX: 0000000020000200 RCX: 00007f39e883d6e4 RDX: 0000000000010000 RSI: 0000000020000100 RDI: 00000000ffffff9c RBP: 0000000020000100 R08: 0000000000000000 R09: 0000000020000000 R10: 0000000000000000 R11: 0000000000000293 R12: 0000000000010000 R13: 0000000020000100 R14: 00007f39e9545fe0 R15: 0000000020006840 Allocated by task 23457: kasan_save_stack mm/kasan/common.c:45 [inline] kasan_set_track+0x3d/0x60 mm/kasan/common.c:52 ____kasan_kmalloc mm/kasan/common.c:371 [inline] __kasan_kmalloc+0x97/0xb0 mm/kasan/common.c:380 kmalloc include/linux/slab.h:553 [inline] kzalloc include/linux/slab.h:689 [inline] jfs_fill_super+0xfb/0xc50 fs/jfs/super.c:495 mount_bdev+0x26c/0x3a0 fs/super.c:1401 legacy_get_tree+0xea/0x180 fs/fs_context.c:610 vfs_get_tree+0x88/0x270 fs/super.c:1531 do_new_mount+0x289/0xad0 fs/namespace.c:3040 do_mount fs/namespace.c:3383 [inline] __do_sys_mount fs/namespace.c:3591 [inline] __se_sys_mount+0x2d3/0x3c0 fs/namespace.c:3568 do_syscall_x64 arch/x86/entry/common.c:50 [inline] do_syscall_64+0x3d/0xb0 arch/x86/entry/common.c:80 entry_SYSCALL_64_after_hwframe+0x63/0xcd Last potentially related work creation: kasan_save_stack+0x2b/0x50 mm/kasan/common.c:45 __kasan_record_aux_stack+0xb0/0xc0 mm/kasan/generic.c:481 kvfree_call_rcu+0x112/0x880 kernel/rcu/tree.c:3343 br_multicast_gc net/bridge/br_multicast.c:775 [inline] br_multicast_gc_work+0x253/0x2b0 net/bridge/br_multicast.c:3850 process_one_work+0x877/0xdb0 kernel/workqueue.c:2289 worker_thread+0xb14/0x1330 kernel/workqueue.c:2436 kthread+0x266/0x300 kernel/kthread.c:376 ret_from_fork+0x1f/0x30 arch/x86/entry/entry_64.S:306 The buggy address belongs to the object at ffff888077c9d200 which belongs to the cache kmalloc-256 of size 256 The buggy address is located 152 bytes to the right of 256-byte region [ffff888077c9d200, ffff888077c9d300) The buggy address belongs to the physical page: page:ffffea0001df2700 refcount:1 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0x77c9c head:ffffea0001df2700 order:1 compound_mapcount:0 compound_pincount:0 flags: 0xfff00000010200(slab|head|node=0|zone=1|lastcpupid=0x7ff) raw: 00fff00000010200 ffffea00007de000 dead000000000003 ffff888012841b40 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 0xd20c0(__GFP_IO|__GFP_FS|__GFP_NOWARN|__GFP_NORETRY|__GFP_COMP|__GFP_NOMEMALLOC), pid 3672, tgid 3672 (syz-executor.5), ts 134443335322, free_ts 134149603743 prep_new_page mm/page_alloc.c:2539 [inline] get_page_from_freelist+0x742/0x7c0 mm/page_alloc.c:4288 __alloc_pages+0x259/0x560 mm/page_alloc.c:5555 alloc_slab_page+0x70/0xf0 mm/slub.c:1794 allocate_slab+0x5e/0x4b0 mm/slub.c:1939 new_slab mm/slub.c:1992 [inline] ___slab_alloc+0x782/0xe20 mm/slub.c:3180 __slab_alloc mm/slub.c:3279 [inline] slab_alloc_node mm/slub.c:3364 [inline] __kmem_cache_alloc_node+0x252/0x310 mm/slub.c:3437 __do_kmalloc_node mm/slab_common.c:954 [inline] __kmalloc+0x9e/0x1a0 mm/slab_common.c:968 kmalloc include/linux/slab.h:558 [inline] kzalloc include/linux/slab.h:689 [inline] fib_create_info+0xa5a/0x2410 net/ipv4/fib_semantics.c:1449 fib_table_insert+0x1e5/0x1f50 net/ipv4/fib_trie.c:1236 fib_magic+0x451/0x650 net/ipv4/fib_frontend.c:1098 fib_add_ifaddr+0x143/0x5c0 net/ipv4/fib_frontend.c:1120 fib_inetaddr_event+0x12b/0x2e0 net/ipv4/fib_frontend.c:1434 notifier_call_chain kernel/notifier.c:87 [inline] blocking_notifier_call_chain+0x108/0x1b0 kernel/notifier.c:382 __inet_insert_ifa+0xa48/0xc40 net/ipv4/devinet.c:554 inet_rtm_newaddr+0x1026/0x1910 net/ipv4/devinet.c:960 rtnetlink_rcv_msg+0x772/0xe60 net/core/rtnetlink.c:6091 page last free stack trace: reset_page_owner include/linux/page_owner.h:24 [inline] free_pages_prepare mm/page_alloc.c:1459 [inline] free_pcp_prepare+0x80c/0x8f0 mm/page_alloc.c:1509 free_unref_page_prepare mm/page_alloc.c:3387 [inline] free_unref_page+0x7d/0x5f0 mm/page_alloc.c:3483 free_slab mm/slub.c:2031 [inline] discard_slab mm/slub.c:2037 [inline] __unfreeze_partials+0x1ab/0x200 mm/slub.c:2586 put_cpu_partial+0x106/0x170 mm/slub.c:2662 qlist_free_all+0x2b/0x70 mm/kasan/quarantine.c:187 kasan_quarantine_reduce+0x169/0x180 mm/kasan/quarantine.c:294 __kasan_slab_alloc+0x1f/0x70 mm/kasan/common.c:302 kasan_slab_alloc include/linux/kasan.h:201 [inline] slab_post_alloc_hook mm/slab.h:737 [inline] slab_alloc_node mm/slub.c:3398 [inline] kmem_cache_alloc_node+0x1ca/0x340 mm/slub.c:3443 __alloc_skb+0xcf/0x2b0 net/core/skbuff.c:497 alloc_skb include/linux/skbuff.h:1267 [inline] alloc_skb_with_frags+0xb4/0x780 net/core/skbuff.c:6126 sock_alloc_send_pskb+0x938/0xa70 net/core/sock.c:2719 unix_dgram_sendmsg+0x5ab/0x2010 net/unix/af_unix.c:1943 sock_sendmsg_nosec net/socket.c:714 [inline] sock_sendmsg net/socket.c:734 [inline] __sys_sendto+0x46e/0x5f0 net/socket.c:2117 __do_sys_sendto net/socket.c:2129 [inline] __se_sys_sendto net/socket.c:2125 [inline] __x64_sys_sendto+0xda/0xf0 net/socket.c:2125 do_syscall_x64 arch/x86/entry/common.c:50 [inline] do_syscall_64+0x3d/0xb0 arch/x86/entry/common.c:80 entry_SYSCALL_64_after_hwframe+0x63/0xcd Memory state around the buggy address: ffff888077c9d280: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb ffff888077c9d300: fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc >ffff888077c9d380: fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc ^ ffff888077c9d400: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 ffff888077c9d480: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 fc ==================================================================