================================================================== BUG: KASAN: slab-out-of-bounds in reiserfs_xattr_get+0xe6/0x570 fs/reiserfs/xattr.c:674 Read of size 8 at addr ffff888028c32b98 by task syz-executor.0/8954 CPU: 1 PID: 8954 Comm: syz-executor.0 Not tainted 6.3.0-rc2-syzkaller-00363-g478a351ce0d6 #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: 0033:0x7f2305a3e284 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:00007f23067bdf10 EFLAGS: 00000293 ORIG_RAX: 0000000000000101 RAX: ffffffffffffffda RBX: 0000000000005ebd RCX: 00007f2305a3e284 RDX: 0000000000010000 RSI: 0000000020005e40 RDI: 00000000ffffff9c RBP: 0000000020005e40 R08: 0000000000000000 R09: 0000000000000000 R10: 0000000000000000 R11: 0000000000000293 R12: 0000000000010000 R13: 0000000020005e40 R14: 00007f23067bdfe0 R15: 0000000020006080 Allocated by task 5102: 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 include/linux/slab.h:584 [inline] kzalloc include/linux/slab.h:720 [inline] fib_create_info+0xa3b/0x2510 net/ipv4/fib_semantics.c:1454 fib_table_insert+0x1f6/0x1f20 net/ipv4/fib_trie.c:1236 fib_magic net/ipv4/fib_frontend.c:1104 [inline] fib_add_ifaddr+0xf50/0x1730 net/ipv4/fib_frontend.c:1148 fib_netdev_event+0x649/0x760 net/ipv4/fib_frontend.c:1486 notifier_call_chain kernel/notifier.c:87 [inline] raw_notifier_call_chain+0xd4/0x170 kernel/notifier.c:455 __dev_notify_flags+0x359/0x650 dev_change_flags+0xf0/0x1a0 net/core/dev.c:8604 do_setlink+0xe93/0x2ae0 net/core/rtnetlink.c:2833 __rtnl_newlink net/core/rtnetlink.c:3623 [inline] rtnl_newlink+0x172d/0x2010 net/core/rtnetlink.c:3670 rtnetlink_rcv_msg+0x825/0xf40 net/core/rtnetlink.c:6174 netlink_rcv_skb+0x1df/0x430 net/netlink/af_netlink.c:2574 netlink_unicast_kernel net/netlink/af_netlink.c:1339 [inline] netlink_unicast+0x7c3/0x990 net/netlink/af_netlink.c:1365 netlink_sendmsg+0xa2a/0xd60 net/netlink/af_netlink.c:1942 sock_sendmsg_nosec net/socket.c:724 [inline] sock_sendmsg net/socket.c:747 [inline] __sys_sendto+0x475/0x630 net/socket.c:2142 __do_sys_sendto net/socket.c:2154 [inline] __se_sys_sendto net/socket.c:2150 [inline] __x64_sys_sendto+0xde/0xf0 net/socket.c:2150 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 ffff888028c32a00 which belongs to the cache kmalloc-256 of size 256 The buggy address is located 160 bytes to the right of allocated 248-byte region [ffff888028c32a00, ffff888028c32af8) The buggy address belongs to the physical page: page:ffffea0000a30c80 refcount:1 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0x28c32 head:ffffea0000a30c80 order:1 entire_mapcount:0 nr_pages_mapped:0 pincount:0 flags: 0xfff00000010200(slab|head|node=0|zone=1|lastcpupid=0x7ff) raw: 00fff00000010200 ffff888012441b40 dead000000000100 dead000000000122 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 0x1d20c0(__GFP_IO|__GFP_FS|__GFP_NOWARN|__GFP_NORETRY|__GFP_COMP|__GFP_NOMEMALLOC|__GFP_HARDWALL), pid 11, tgid 11 (kworker/u4:1), ts 230445371667, free_ts 225378771245 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] sta_info_insert_finish net/mac80211/sta_info.c:830 [inline] sta_info_insert_rcu+0x634/0x1720 net/mac80211/sta_info.c:947 ieee80211_ibss_finish_sta+0x272/0x340 net/mac80211/ibss.c:585 ieee80211_update_sta_info net/mac80211/ibss.c:1027 [inline] ieee80211_rx_bss_info net/mac80211/ibss.c:1118 [inline] ieee80211_rx_mgmt_probe_beacon net/mac80211/ibss.c:1609 [inline] ieee80211_ibss_rx_queued_mgmt+0x1593/0x2cf0 net/mac80211/ibss.c:1638 ieee80211_iface_process_skb net/mac80211/iface.c:1583 [inline] ieee80211_iface_work+0x7bd/0xd00 net/mac80211/iface.c:1637 process_one_work+0x8a0/0x10e0 kernel/workqueue.c:2390 worker_thread+0xa63/0x1210 kernel/workqueue.c:2537 kthread+0x270/0x300 kernel/kthread.c:376 ret_from_fork+0x1f/0x30 arch/x86/entry/entry_64.S:308 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 discard_slab mm/slub.c:2098 [inline] __unfreeze_partials+0x1b1/0x1f0 mm/slub.c:2637 put_cpu_partial+0x116/0x180 mm/slub.c:2713 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] nlmsg_new include/net/netlink.h:1003 [inline] rtmsg_fib+0x144/0x620 net/ipv4/fib_semantics.c:521 fib_table_insert+0xfba/0x1f20 net/ipv4/fib_trie.c:1404 fib_magic net/ipv4/fib_frontend.c:1104 [inline] fib_add_ifaddr+0x483/0x1730 net/ipv4/fib_frontend.c:1126 fib_inetaddr_event+0x12f/0x2c0 net/ipv4/fib_frontend.c:1440 notifier_call_chain kernel/notifier.c:87 [inline] blocking_notifier_call_chain+0x108/0x1b0 kernel/notifier.c:382 __inet_insert_ifa+0x9cf/0xbd0 net/ipv4/devinet.c:555 Memory state around the buggy address: ffff888028c32a80: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 fc ffff888028c32b00: fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc >ffff888028c32b80: fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc ^ ffff888028c32c00: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 ffff888028c32c80: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 fc ==================================================================