New replicast peer: fe80:0000:0000:0000:0000:0000:0000:0000 Enabled bearer , priority 10 Disabling bearer ================================================================== BUG: KASAN: use-after-free in tipc_udp_xmit+0x96b/0xc10 net/tipc/udp_media.c:193 Read of size 8 at addr ffff88804cfe00a0 by task syz-executor.5/16598 CPU: 0 PID: 16598 Comm: syz-executor.5 Not tainted 4.19.211-syzkaller #0 Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 10/26/2022 Call Trace: __dump_stack lib/dump_stack.c:77 [inline] dump_stack+0x1fc/0x2ef lib/dump_stack.c:118 print_address_description.cold+0x54/0x219 mm/kasan/report.c:256 kasan_report_error.cold+0x8a/0x1b9 mm/kasan/report.c:354 kasan_report mm/kasan/report.c:412 [inline] __asan_report_load8_noabort+0x88/0x90 mm/kasan/report.c:433 tipc_udp_xmit+0x96b/0xc10 net/tipc/udp_media.c:193 tipc_udp_send_msg+0x279/0x490 net/tipc/udp_media.c:248 tipc_bearer_xmit_skb+0x15b/0x330 net/tipc/bearer.c:518 tipc_disc_timeout+0x855/0xc90 net/tipc/discover.c:332 call_timer_fn+0x177/0x700 kernel/time/timer.c:1338 expire_timers+0x243/0x4e0 kernel/time/timer.c:1375 __run_timers kernel/time/timer.c:1696 [inline] run_timer_softirq+0x21c/0x670 kernel/time/timer.c:1709 __do_softirq+0x265/0x980 kernel/softirq.c:292 invoke_softirq kernel/softirq.c:372 [inline] irq_exit+0x215/0x260 kernel/softirq.c:412 exiting_irq arch/x86/include/asm/apic.h:536 [inline] smp_apic_timer_interrupt+0x136/0x550 arch/x86/kernel/apic/apic.c:1098 apic_timer_interrupt+0xf/0x20 arch/x86/entry/entry_64.S:894 RIP: 0010:lru_cache_add_active_or_unevictable+0x0/0x5d0 mm/swap.c:456 Code: fd ff ff 48 89 df e8 3f 8c 16 00 e9 ba fc ff ff 48 89 df e8 32 8c 16 00 e9 3c fe ff ff 48 89 df e8 25 8c 16 00 e9 91 fe ff ff <41> 57 41 56 41 55 41 54 49 89 f4 55 48 89 fd 53 4c 8d 6d 08 e8 17 RSP: 0018:ffff8880a86279f0 EFLAGS: 00000296 ORIG_RAX: ffffffffffffff13 RAX: 00fff00000040008 RBX: ffff88809dbc5d68 RCX: 1ffff11013bd293a RDX: 1ffffd400026cbe8 RSI: ffff88809dbc5d68 RDI: ffffea0001365f40 RBP: ffff8880a8627b38 R08: 0000000000000001 R09: 0000000000000000 R10: 0000000000000000 R11: 0000000000000000 R12: ffff8880a654f1c0 R13: ffff8880a8627b88 R14: ffffea0001365f40 R15: ffff8880a8627b90 do_anonymous_page+0x132c/0x1be0 mm/memory.c:3351 handle_pte_fault mm/memory.c:4173 [inline] __handle_mm_fault+0x227a/0x41c0 mm/memory.c:4299 handle_mm_fault+0x436/0xb10 mm/memory.c:4336 faultin_page mm/gup.c:539 [inline] __get_user_pages+0x6f0/0x1710 mm/gup.c:745 populate_vma_page_range+0x200/0x290 mm/gup.c:1249 FAT-fs (loop3): Unrecognized mount option "ÿÿÿÿÿÿÿÿ184467440737095516150xffffffffffffffff" or missing value __mm_populate+0x1ea/0x350 mm/gup.c:1297 do_mlock+0x264/0x6b0 mm/mlock.c:710 __do_sys_mlock mm/mlock.c:718 [inline] __se_sys_mlock mm/mlock.c:716 [inline] __x64_sys_mlock+0x55/0x80 mm/mlock.c:716 do_syscall_64+0xf9/0x620 arch/x86/entry/common.c:293 entry_SYSCALL_64_after_hwframe+0x49/0xbe RIP: 0033:0x7f02ac1600d9 Code: 28 00 00 00 75 05 48 83 c4 28 c3 e8 f1 19 00 00 90 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 b8 ff ff ff f7 d8 64 89 01 48 RSP: 002b:00007f02aa6d2168 EFLAGS: 00000246 ORIG_RAX: 0000000000000095 RAX: ffffffffffffffda RBX: 00007f02ac27ff80 RCX: 00007f02ac1600d9 RDX: 0000000000000000 RSI: 0000000000800000 RDI: 00000000200e4000 RBP: 00007f02ac1bbae9 R08: 0000000000000000 R09: 0000000000000000 R10: 0000000000000000 R11: 0000000000000246 R12: 0000000000000000 R13: 00007fffcd5742ef R14: 00007f02aa6d2300 R15: 0000000000022000 Allocated by task 16604: kmem_cache_alloc+0x122/0x370 mm/slab.c:3559 sock_alloc_inode+0x19/0x250 net/socket.c:244 alloc_inode+0x5d/0x180 fs/inode.c:211 new_inode_pseudo+0x14/0xe0 fs/inode.c:911 sock_alloc+0x3c/0x260 net/socket.c:567 __sock_create+0xba/0x740 net/socket.c:1329 udp_sock_create6+0xd1/0x550 net/ipv6/ip6_udp_tunnel.c:22 udp_sock_create include/net/udp_tunnel.h:61 [inline] tipc_udp_enable+0xb48/0x14d0 net/tipc/udp_media.c:734 tipc_enable_bearer+0x70f/0xbe0 net/tipc/bearer.c:317 __tipc_nl_bearer_enable+0x2e2/0x3d0 net/tipc/bearer.c:916 tipc_nl_bearer_enable+0x1e/0x30 net/tipc/bearer.c:925 genl_family_rcv_msg+0x642/0xc40 net/netlink/genetlink.c:602 genl_rcv_msg+0xbf/0x160 net/netlink/genetlink.c:627 netlink_rcv_skb+0x160/0x440 net/netlink/af_netlink.c:2463 genl_rcv+0x24/0x40 net/netlink/genetlink.c:638 netlink_unicast_kernel net/netlink/af_netlink.c:1325 [inline] netlink_unicast+0x4d5/0x690 net/netlink/af_netlink.c:1351 netlink_sendmsg+0x6c3/0xc50 net/netlink/af_netlink.c:1917 sock_sendmsg_nosec net/socket.c:651 [inline] sock_sendmsg+0xc3/0x120 net/socket.c:661 ___sys_sendmsg+0x7bb/0x8e0 net/socket.c:2227 __sys_sendmsg net/socket.c:2265 [inline] __do_sys_sendmsg net/socket.c:2274 [inline] __se_sys_sendmsg net/socket.c:2272 [inline] __x64_sys_sendmsg+0x132/0x220 net/socket.c:2272 do_syscall_64+0xf9/0x620 arch/x86/entry/common.c:293 entry_SYSCALL_64_after_hwframe+0x49/0xbe Freed by task 9336: __cache_free mm/slab.c:3503 [inline] kmem_cache_free+0x7f/0x260 mm/slab.c:3765 destroy_inode+0xb9/0x110 fs/inode.c:268 iput_final fs/inode.c:1555 [inline] iput+0x4f1/0x860 fs/inode.c:1581 __sock_release net/socket.c:611 [inline] sock_release+0x174/0x1d0 net/socket.c:619 cleanup_bearer+0x1bb/0x280 net/tipc/udp_media.c:775 process_one_work+0x864/0x1570 kernel/workqueue.c:2153 worker_thread+0x64c/0x1130 kernel/workqueue.c:2296 kthread+0x33f/0x460 kernel/kthread.c:259 ret_from_fork+0x24/0x30 arch/x86/entry/entry_64.S:415 The buggy address belongs to the object at ffff88804cfe0080 which belongs to the cache sock_inode_cache of size 992 The buggy address is located 32 bytes inside of 992-byte region [ffff88804cfe0080, ffff88804cfe0460) The buggy address belongs to the page: page:ffffea000133f800 count:1 mapcount:0 mapping:ffff88823b33a6c0 index:0xffff88804cfe0ffd flags: 0xfff00000000100(slab) raw: 00fff00000000100 ffffea00011f2b08 ffffea000233ecc8 ffff88823b33a6c0 raw: ffff88804cfe0ffd ffff88804cfe0080 0000000100000001 0000000000000000 page dumped because: kasan: bad access detected Memory state around the buggy address: ffff88804cfdff80: fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc ffff88804cfe0000: fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc >ffff88804cfe0080: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb ^ ffff88804cfe0100: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb ffff88804cfe0180: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb ================================================================== ---------------- Code disassembly (best guess), 3 bytes skipped: 0: 48 89 df mov %rbx,%rdi 3: e8 3f 8c 16 00 callq 0x168c47 8: e9 ba fc ff ff jmpq 0xfffffcc7 d: 48 89 df mov %rbx,%rdi 10: e8 32 8c 16 00 callq 0x168c47 15: e9 3c fe ff ff jmpq 0xfffffe56 1a: 48 89 df mov %rbx,%rdi 1d: e8 25 8c 16 00 callq 0x168c47 22: e9 91 fe ff ff jmpq 0xfffffeb8 * 27: 41 57 push %r15 <-- trapping instruction 29: 41 56 push %r14 2b: 41 55 push %r13 2d: 41 54 push %r12 2f: 49 89 f4 mov %rsi,%r12 32: 55 push %rbp 33: 48 89 fd mov %rdi,%rbp 36: 53 push %rbx 37: 4c 8d 6d 08 lea 0x8(%rbp),%r13 3b: e8 .byte 0xe8 3c: 17 (bad)