On Sun, Jan 6, 2019 at 2:31 PM syzbot <syzbot+05fc3a636f5ee8830a99@xxxxxxxxxxxxxxxxxxxxxxxxx> wrote: > > Hello, > > syzbot found the following crash on: > > HEAD commit: 3fed6ae4b027 ia64: fix compile without swiotlb > git tree: upstream > console output: https://syzkaller.appspot.com/x/log.txt?x=161ce1d7400000 > kernel config: https://syzkaller.appspot.com/x/.config?x=7308e68273924137 > dashboard link: https://syzkaller.appspot.com/bug?extid=05fc3a636f5ee8830a99 > compiler: gcc (GCC) 9.0.0 20181231 (experimental) > userspace arch: i386 > syz repro: https://syzkaller.appspot.com/x/repro.syz?x=10b3769f400000 > > IMPORTANT: if you fix the bug, please add the following tag to the commit: > Reported-by: syzbot+05fc3a636f5ee8830a99@xxxxxxxxxxxxxxxxxxxxxxxxx I suspect this is another incarnation of: https://syzkaller.appspot.com/bug?id=4821de869e3d78a255a034bf212a4e009f6125a7 Any other ideas? > ------------[ cut here ]------------ > DEBUG_LOCKS_WARN_ON(current->hardirq_context) > ------------[ cut here ]------------ > Bad or missing usercopy whitelist? Kernel memory overwrite attempt detected > to SLAB object 'task_struct' (offset 912, size 2)! > ================================================================== > BUG: KASAN: stack-out-of-bounds in task_stack_page > include/linux/sched/task_stack.h:21 [inline] > BUG: KASAN: stack-out-of-bounds in check_stack_object+0x14e/0x160 > mm/usercopy.c:39 > list_add corruption. next->prev should be prev (ffff8880ae62d8d8), but was > 0000000000000000. (next=ffff8880a94642f0). > Read of size 8 at addr ffff8880a9464258 by task /-1455013312 > ------------[ cut here ]------------ > > kernel BUG at lib/list_debug.c:23! > CPU: 0 PID: -1455013312 Comm: Not tainted 4.20.0+ #10 > invalid opcode: 0000 [#1] PREEMPT SMP KASAN > Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS > Google 01/01/2011 > CPU: 1 PID: 5941 Comm: syz-executor1 Not tainted 4.20.0+ #10 > Call Trace: > Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS > Google 01/01/2011 > > RIP: 0010:__list_add_valid.cold+0xf/0x3c lib/list_debug.c:23 > Allocated by task 2570092928: > Code: 34 fe eb d5 4c 89 e7 e8 2a dd 34 fe eb a3 4c 89 f7 e8 20 dd 34 fe e9 > 56 ff ff ff 4c 89 e1 48 c7 c7 60 b4 81 88 e8 f0 2d d7 fd <0f> 0b 48 89 f2 > 4c 89 e1 4c 89 ee 48 c7 c7 a0 b5 81 88 e8 d9 2d d7 > RSP: 0018:ffff8880ae707770 EFLAGS: 00010086 > RAX: 0000000000000075 RBX: ffff8880a3260730 RCX: 0000000000000000 > RDX: 0000000000000000 RSI: ffffffff81684c16 RDI: ffffed1015ce0ee0 > RBP: ffff8880ae707788 R08: 0000000000000075 R09: ffffed1015ce5021 > R10: ffffed1015ce5020 R11: ffff8880ae728107 R12: ffff8880a94642f0 > R13: ffff8880a3260730 R14: ffff8880ae62d8d8 R15: ffff8880ae707ad0 > FS: 0000000000000000(0000) GS:ffff8880ae700000(0063) knlGS:00000000f7fbbb40 > CS: 0010 DS: 002b ES: 002b CR0: 0000000080050033 > CR2: 0000000000625208 CR3: 00000000a57b8000 CR4: 00000000001406e0 > DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000 > DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400 > Call Trace: > <IRQ> > __list_add include/linux/list.h:60 [inline] > list_add include/linux/list.h:79 [inline] > list_move include/linux/list.h:171 [inline] > detach_tasks kernel/sched/fair.c:7557 [inline] > load_balance+0x1bdd/0x39d0 kernel/sched/fair.c:8979 > rebalance_domains+0x815/0xf00 kernel/sched/fair.c:9366 > run_rebalance_domains+0x376/0x4e0 kernel/sched/fair.c:9986 > __do_softirq+0x30b/0xb11 kernel/softirq.c:292 > invoke_softirq kernel/softirq.c:373 [inline] > irq_exit+0x180/0x1d0 kernel/softirq.c:413 > exiting_irq arch/x86/include/asm/apic.h:536 [inline] > smp_apic_timer_interrupt+0x1b7/0x760 arch/x86/kernel/apic/apic.c:1062 > apic_timer_interrupt+0xf/0x20 arch/x86/entry/entry_64.S:807 > </IRQ> > RIP: 0010:update_stack_state+0x24c/0x680 arch/x86/kernel/unwind_frame.c:244 > Code: 48 b9 00 00 00 00 00 fc ff df 4c 89 f6 48 c1 ee 03 80 3c 0e 00 0f 85 > b3 03 00 00 48 39 9d 30 ff ff ff 4d 8b 67 40 40 0f 97 c6 <4d> 85 e4 0f 95 > c1 40 84 ce 74 0c 39 85 44 ff ff ff 0f 84 68 01 00 > RSP: 0018:ffff88809870e768 EFLAGS: 00000283 ORIG_RAX: ffffffffffffff13 > RAX: 0000000000000001 RBX: ffff88809870ec58 RCX: dffffc0000000000 > RDX: ffff888098708000 RSI: 1ffff110130e1d00 RDI: ffff88809870e968 > RBP: ffff88809870e850 R08: 0000000000000001 R09: ffff88809870e9a8 > R10: ffff88809870e980 R11: ffff88809870e990 R12: ffff88809870e948 > R13: dffffc0000000000 R14: ffff88809870e998 R15: ffff88809870e958 > unwind_next_frame.part.0+0x1ae/0xa90 arch/x86/kernel/unwind_frame.c:329 > unwind_next_frame+0x3b/0x50 arch/x86/kernel/unwind_frame.c:287 > __save_stack_trace+0x7a/0xf0 arch/x86/kernel/stacktrace.c:44 > save_stack_trace+0x1a/0x20 arch/x86/kernel/stacktrace.c:60 > save_stack+0x45/0xd0 mm/kasan/common.c:73 > set_track mm/kasan/common.c:85 [inline] > kasan_kmalloc mm/kasan/common.c:482 [inline] > kasan_kmalloc+0xcf/0xe0 mm/kasan/common.c:455 > kasan_slab_alloc+0xf/0x20 mm/kasan/common.c:397 > slab_post_alloc_hook mm/slab.h:444 [inline] > slab_alloc_node mm/slab.c:3322 [inline] > kmem_cache_alloc_node_trace+0x13c/0x720 mm/slab.c:3648 > __do_kmalloc_node mm/slab.c:3670 [inline] > __kmalloc_node_track_caller+0x3d/0x70 mm/slab.c:3685 > __kmalloc_reserve.isra.0+0x40/0xe0 net/core/skbuff.c:140 > __alloc_skb+0x12d/0x730 net/core/skbuff.c:208 > alloc_skb include/linux/skbuff.h:1011 [inline] > alloc_skb_with_frags+0x13a/0x770 net/core/skbuff.c:5288 > sock_alloc_send_pskb+0x8c9/0xad0 net/core/sock.c:2091 > sock_alloc_send_skb+0x32/0x40 net/core/sock.c:2108 > __ip6_append_data.isra.0+0x2556/0x3f20 net/ipv6/ip6_output.c:1443 > ip6_make_skb+0x391/0x5f0 net/ipv6/ip6_output.c:1806 > udpv6_sendmsg+0x2b58/0x3550 net/ipv6/udp.c:1460 > inet_sendmsg+0x1af/0x740 net/ipv4/af_inet.c:798 > sock_sendmsg_nosec net/socket.c:621 [inline] > sock_sendmsg+0xdd/0x130 net/socket.c:631 > ___sys_sendmsg+0x409/0x910 net/socket.c:2116 > __sys_sendmmsg+0x3bc/0x730 net/socket.c:2204 > __compat_sys_sendmmsg net/compat.c:771 [inline] > __do_compat_sys_sendmmsg net/compat.c:778 [inline] > __se_compat_sys_sendmmsg net/compat.c:775 [inline] > __ia32_compat_sys_sendmmsg+0x9f/0x100 net/compat.c:775 > do_syscall_32_irqs_on arch/x86/entry/common.c:326 [inline] > do_fast_syscall_32+0x333/0xf98 arch/x86/entry/common.c:397 > entry_SYSENTER_compat+0x70/0x7f arch/x86/entry/entry_64_compat.S:139 > RIP: 0023:0xf7fbf869 > Code: 85 d2 74 02 89 0a 5b 5d c3 8b 04 24 c3 8b 14 24 c3 8b 3c 24 c3 90 90 > 90 90 90 90 90 90 90 90 90 90 51 52 55 89 e5 0f 34 cd 80 <5d> 5a 59 c3 90 > 90 90 90 eb 0d 90 90 90 90 90 90 90 90 90 90 90 90 > RSP: 002b:00000000f7fbb0cc EFLAGS: 00000296 ORIG_RAX: 0000000000000159 > RAX: ffffffffffffffda RBX: 0000000000000003 RCX: 0000000020005fc0 > RDX: 00000000000000fc RSI: 0000000008000000 RDI: 0000000000000000 > RBP: 0000000000000000 R08: 0000000000000000 R09: 0000000000000000 > R10: 0000000000000000 R11: 0000000000000000 R12: 0000000000000000 > R13: 0000000000000000 R14: 0000000000000000 R15: 0000000000000000 > Modules linked in: > ---[ end trace e0e50d48068f1e3d ]--- > BUG: unable to handle kernel paging request at ffffffff8cf14780 > #PF error: [normal kernel read fault] > RIP: 0010:__list_add_valid.cold+0xf/0x3c lib/list_debug.c:23 > PGD 9874067 P4D 9874067 PUD 9875063 PMD 0 > Code: 34 fe eb d5 4c 89 e7 e8 2a dd 34 fe eb a3 4c 89 f7 e8 20 dd 34 fe e9 > 56 ff ff ff 4c 89 e1 48 c7 c7 60 b4 81 88 e8 f0 2d d7 fd <0f> 0b 48 89 f2 > 4c 89 e1 4c 89 ee 48 c7 c7 a0 b5 81 88 e8 d9 2d d7 > Thread overran stack, or stack corrupted > RSP: 0018:ffff8880ae707770 EFLAGS: 00010086 > Oops: 0000 [#2] PREEMPT SMP KASAN > RAX: 0000000000000075 RBX: ffff8880a3260730 RCX: 0000000000000000 > CPU: 0 PID: -1455013312 Comm: Tainted: G D 4.20.0+ #10 > RDX: 0000000000000000 RSI: ffffffff81684c16 RDI: ffffed1015ce0ee0 > Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS > Google 01/01/2011 > RBP: ffff8880ae707788 R08: 0000000000000075 R09: ffffed1015ce5021 > RIP: 0010:depot_fetch_stack+0x10/0x30 lib/stackdepot.c:202 > R10: ffffed1015ce5020 R11: ffff8880ae728107 R12: ffff8880a94642f0 > Code: e6 72 22 fe e9 20 fe ff ff 48 89 df e8 d9 72 22 fe e9 f1 fd ff ff 90 > 90 90 90 89 f8 c1 ef 11 25 ff ff 1f 00 81 e7 f0 3f 00 00 <48> 03 3c c5 80 > 03 f5 8b 8b 47 0c 48 83 c7 18 c7 46 10 00 00 00 00 > R13: ffff8880a3260730 R14: ffff8880ae62d8d8 R15: ffff8880ae707ad0 > RSP: 0018:ffff8880a9463fb8 EFLAGS: 00010006 > FS: 0000000000000000(0000) GS:ffff8880ae700000(0063) knlGS:00000000f7fbbb40 > RAX: 00000000001f8880 RBX: ffff8880a9465a04 RCX: 0000000000000000 > CS: 0010 DS: 002b ES: 002b CR0: 0000000080050033 > RDX: 0000000000000000 RSI: ffff8880a9463fc0 RDI: 0000000000003ff0 > CR2: 0000000000625208 CR3: 00000000a57b8000 CR4: 00000000001406e0 > RBP: ffff8880a9463fe8 R08: 000000000000001d R09: ffffed1015cc3ef9 > DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000 > R10: ffffed1015cc3ef8 R11: ffff8880ae61f7c7 R12: ffffea0002a51900 > DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400 > R13: ffff8880a9464258 R14: ffff8880aa13d900 R15: ffff8880a9465a00 > > > --- > This bug is generated by a bot. It may contain errors. > See https://goo.gl/tpsmEJ for more information about syzbot. > syzbot engineers can be reached at syzkaller@xxxxxxxxxxxxxxxx. > > syzbot will keep track of this bug report. See: > https://goo.gl/tpsmEJ#bug-status-tracking for how to communicate with > syzbot. > syzbot can test patches for this bug, for details see: > https://goo.gl/tpsmEJ#testing-patches > > -- > You received this message because you are subscribed to the Google Groups "syzkaller-bugs" group. > To unsubscribe from this group and stop receiving emails from it, send an email to syzkaller-bugs+unsubscribe@xxxxxxxxxxxxxxxx. > To view this discussion on the web visit https://groups.google.com/d/msgid/syzkaller-bugs/000000000000ae2357057eca1fa5%40google.com. > For more options, visit https://groups.google.com/d/optout.
