general protection fault, probably for non-canonical address 0xdffffc0000000001: 0000 [#1] PREEMPT SMP KASAN KASAN: null-ptr-deref in range [0x0000000000000008-0x000000000000000f] CPU: 1 PID: 7006 Comm: syz-executor740 Not tainted 5.9.0-rc6-next-20200924-syzkaller #0 Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011 RIP: 0010:compound_head include/linux/page-flags.h:185 [inline] RIP: 0010:put_page include/linux/mm.h:1180 [inline] RIP: 0010:__skb_frag_unref include/linux/skbuff.h:3014 [inline] RIP: 0010:skb_release_data+0x232/0x910 net/core/skbuff.c:604 Code: 48 c1 e8 03 42 80 3c 30 00 0f 85 ea 05 00 00 48 8b 0c 24 49 63 c4 48 c1 e0 04 48 8b 6c 08 30 48 8d 7d 08 48 89 f8 48 c1 e8 03 <42> 80 3c 30 00 0f 85 ba 05 00 00 48 8b 5d 08 31 ff 49 89 dd 41 83 RSP: 0018:ffffc90000da8aa8 EFLAGS: 00010202 RAX: 0000000000000001 RBX: 0000000000000003 RCX: ffff8880973b4cc0 RDX: ffff8880a6a04300 RSI: ffffffff86553775 RDI: 0000000000000008 RBP: 0000000000000000 R08: 0000000000000000 R09: ffffffff8bb4b74f R10: 0000000000000000 R11: 0000000000000000 R12: 0000000000000000 R13: ffff8880973b4cc0 R14: dffffc0000000000 R15: ffff8880973b4cf0 FS: 00000000012da880(0000) GS:ffff8880ae500000(0000) knlGS:0000000000000000 CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033 CR2: 00000000200004c0 CR3: 00000000a7011000 CR4: 00000000001506e0 DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000 DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400 Call Trace: skb_release_all net/core/skbuff.c:664 [inline] __kfree_skb net/core/skbuff.c:678 [inline] kfree_skb net/core/skbuff.c:696 [inline] kfree_skb+0x133/0x3f0 net/core/skbuff.c:690 validate_xmit_skb+0x9d9/0xf00 net/core/dev.c:3665 __dev_queue_xmit+0x98a/0x2d30 net/core/dev.c:4129 garp_queue_xmit net/802/garp.c:259 [inline] garp_join_timer+0xb9/0xf0 net/802/garp.c:410 call_timer_fn+0x1a5/0x6b0 kernel/time/timer.c:1413 expire_timers kernel/time/timer.c:1458 [inline] __run_timers.part.0+0x67c/0xa50 kernel/time/timer.c:1755 __run_timers kernel/time/timer.c:1736 [inline] run_timer_softirq+0xb3/0x1d0 kernel/time/timer.c:1768 __do_softirq+0x203/0xab6 kernel/softirq.c:298 asm_call_on_stack+0xf/0x20 arch/x86/entry/entry_64.S:786 __run_on_irqstack arch/x86/include/asm/irq_stack.h:22 [inline] run_on_irqstack_cond arch/x86/include/asm/irq_stack.h:48 [inline] do_softirq_own_stack+0x9d/0xd0 arch/x86/kernel/irq_64.c:77 invoke_softirq kernel/softirq.c:393 [inline] __irq_exit_rcu kernel/softirq.c:423 [inline] irq_exit_rcu+0x235/0x280 kernel/softirq.c:435 sysvec_apic_timer_interrupt+0x51/0xf0 arch/x86/kernel/apic/apic.c:1091 asm_sysvec_apic_timer_interrupt+0x12/0x20 arch/x86/include/asm/idtentry.h:631 RIP: 0010:arch_local_irq_restore arch/x86/include/asm/paravirt.h:653 [inline] RIP: 0010:console_unlock+0xa31/0xd20 kernel/printk/printk.c:2500 Code: 3c 8a 48 c1 e8 03 42 80 3c 38 00 0f 85 87 02 00 00 48 83 3d 48 4f df 08 00 0f 84 9e 01 00 00 e8 05 8f 17 00 48 8b 3c 24 57 9d <0f> 1f 44 00 00 8b 5c 24 3c 31 ff 89 de e8 4d 8b 17 00 85 db 0f 84 RSP: 0018:ffffc90005596df0 EFLAGS: 00000293 RAX: 0000000000000000 RBX: 0000000000000000 RCX: ffffffff815a9cb7 RDX: ffff8880a6a04300 RSI: ffffffff815da26b RDI: 0000000000000293 RBP: ffffffff84dfd5e0 R08: 0000000000000001 R09: ffffffff8d71a9e7 R10: fffffbfff1ae353c R11: 0000000000000000 R12: 0000000000000000 R13: ffffffff8b0e0f10 R14: 0000000000000200 R15: dffffc0000000000 vprintk_emit+0x2a6/0x6e0 kernel/printk/printk.c:2021 vprintk_func+0x8d/0x1e0 kernel/printk/printk_safe.c:393 printk+0xba/0xed kernel/printk/printk.c:2069 __dev_set_promiscuity.cold+0x55/0x35f net/core/dev.c:8123 __dev_change_flags+0x3af/0x660 net/core/dev.c:8341 rtnl_configure_link+0xee/0x230 net/core/rtnetlink.c:3123 __rtnl_newlink+0x10b6/0x1750 net/core/rtnetlink.c:3460 rtnl_newlink+0x64/0xa0 net/core/rtnetlink.c:3500 rtnetlink_rcv_msg+0x44e/0xad0 net/core/rtnetlink.c:5563 netlink_rcv_skb+0x15a/0x430 net/netlink/af_netlink.c:2470 netlink_unicast_kernel net/netlink/af_netlink.c:1304 [inline] netlink_unicast+0x533/0x7d0 net/netlink/af_netlink.c:1330 netlink_sendmsg+0x856/0xd90 net/netlink/af_netlink.c:1919 sock_sendmsg_nosec net/socket.c:651 [inline] sock_sendmsg+0xcf/0x120 net/socket.c:671 ____sys_sendmsg+0x6e8/0x810 net/socket.c:2362 ___sys_sendmsg+0xf3/0x170 net/socket.c:2416 __sys_sendmsg+0xe5/0x1b0 net/socket.c:2449 do_syscall_64+0x2d/0x70 arch/x86/entry/common.c:46 entry_SYSCALL_64_after_hwframe+0x44/0xa9 RIP: 0033:0x441929 Code: e8 5c ad 02 00 48 83 c4 18 c3 0f 1f 80 00 00 00 00 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 0f 83 bb 09 fc ff c3 66 2e 0f 1f 84 00 00 00 00 RSP: 002b:00007ffef9b4a3f8 EFLAGS: 00000246 ORIG_RAX: 000000000000002e RAX: ffffffffffffffda RBX: 0000000000000003 RCX: 0000000000441929 RDX: 0000000000000000 RSI: 0000000020000280 RDI: 0000000000000005 RBP: 00007ffef9b4a400 R08: 0000000100000000 R09: 0000000100000000 R10: 0000000100000000 R11: 0000000000000246 R12: 000000000000fde0 R13: 0000000000402800 R14: 0000000000000000 R15: 0000000000000000 Modules linked in: ---[ end trace 5f20bbd0d5710271 ]--- RIP: 0010:compound_head include/linux/page-flags.h:185 [inline] RIP: 0010:put_page include/linux/mm.h:1180 [inline] RIP: 0010:__skb_frag_unref include/linux/skbuff.h:3014 [inline] RIP: 0010:skb_release_data+0x232/0x910 net/core/skbuff.c:604 Code: 48 c1 e8 03 42 80 3c 30 00 0f 85 ea 05 00 00 48 8b 0c 24 49 63 c4 48 c1 e0 04 48 8b 6c 08 30 48 8d 7d 08 48 89 f8 48 c1 e8 03 <42> 80 3c 30 00 0f 85 ba 05 00 00 48 8b 5d 08 31 ff 49 89 dd 41 83 RSP: 0018:ffffc90000da8aa8 EFLAGS: 00010202 RAX: 0000000000000001 RBX: 0000000000000003 RCX: ffff8880973b4cc0 RDX: ffff8880a6a04300 RSI: ffffffff86553775 RDI: 0000000000000008 RBP: 0000000000000000 R08: 0000000000000000 R09: ffffffff8bb4b74f R10: 0000000000000000 R11: 0000000000000000 R12: 0000000000000000 R13: ffff8880973b4cc0 R14: dffffc0000000000 R15: ffff8880973b4cf0 FS: 00000000012da880(0000) GS:ffff8880ae500000(0000) knlGS:0000000000000000 CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033 CR2: 00000000200004c0 CR3: 00000000a7011000 CR4: 00000000001506e0 DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000 DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400