general protection fault, probably for non-canonical address 0xdffffc00400dbd01: 0000 [#1] PREEMPT SMP KASAN KASAN: probably user-memory-access in range [0x00000002006de808-0x00000002006de80f] CPU: 1 PID: 8449 Comm: syz-fuzzer Not tainted 5.12.0-rc8-next-20210423-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:184 [inline] RIP: 0010:put_page include/linux/mm.h:1229 [inline] RIP: 0010:__skb_frag_unref include/linux/skbuff.h:3089 [inline] RIP: 0010:skb_release_data+0x3a0/0x750 net/core/skbuff.c:667 Code: 48 8b 04 24 48 c1 e8 03 42 80 3c 30 00 0f 85 d3 02 00 00 49 63 c4 48 c1 e0 04 4a 8b 6c 28 30 48 8d 7d 08 48 89 f8 48 c1 e8 03 <42> 80 3c 30 00 0f 85 a7 02 00 00 48 8b 45 08 31 ff 48 89 c3 48 89 RSP: 0018:ffffc9000188f960 EFLAGS: 00010202 RAX: 00000000400dbd01 RBX: 0000000000000011 RCX: 0000000000000000 RDX: ffff888024b90000 RSI: ffffffff8703c746 RDI: 00000002006de808 RBP: 00000002006de800 R08: 0000000000000011 R09: ffffffff90207957 R10: ffffffff8703c733 R11: 0000000000000009 R12: 0000000000000010 R13: ffff88802e8e7ecc R14: dffffc0000000000 R15: ffff8880293dac80 FS: 0000000000000000(0000) GS:ffff8880b9d00000(0000) knlGS:0000000000000000 CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033 CR2: 0000000000b8db4c CR3: 000000000bc8e000 CR4: 00000000001506e0 DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000 DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400 Call Trace: skb_release_all net/core/skbuff.c:726 [inline] __kfree_skb+0x46/0x60 net/core/skbuff.c:740 __tcp_close+0x230/0x1170 net/ipv4/tcp.c:2732 tcp_close+0x29/0xc0 net/ipv4/tcp.c:2879 inet_release+0x12e/0x280 net/ipv4/af_inet.c:431 __sock_release+0xcd/0x280 net/socket.c:599 sock_close+0x18/0x20 net/socket.c:1258 __fput+0x288/0x920 fs/file_table.c:280 task_work_run+0xdd/0x1a0 kernel/task_work.c:164 exit_task_work include/linux/task_work.h:32 [inline] do_exit+0xbfc/0x2a70 kernel/exit.c:826 do_group_exit+0x125/0x310 kernel/exit.c:923 get_signal+0x47f/0x2150 kernel/signal.c:2818 arch_do_signal_or_restart+0x2a8/0x1eb0 arch/x86/kernel/signal.c:789 handle_signal_work kernel/entry/common.c:147 [inline] exit_to_user_mode_loop kernel/entry/common.c:171 [inline] exit_to_user_mode_prepare+0x171/0x280 kernel/entry/common.c:208 __syscall_exit_to_user_mode_work kernel/entry/common.c:290 [inline] syscall_exit_to_user_mode+0x19/0x60 kernel/entry/common.c:301 do_syscall_64+0x47/0xb0 arch/x86/entry/common.c:57 entry_SYSCALL_64_after_hwframe+0x44/0xae RIP: 0033:0x46dabd Code: Unable to access opcode bytes at RIP 0x46da93. RSP: 002b:000000c00003df18 EFLAGS: 00000206 ORIG_RAX: 0000000000000023 RAX: fffffffffffffdfc RBX: 0000000000000a00 RCX: 000000000046dabd RDX: 0000000000000000 RSI: 0000000000000000 RDI: 000000c00003df18 RBP: 000000c00003df28 R08: 0000000000000c97 R09: 00007ffd073ec080 R10: 00007ffd073ec090 R11: 0000000000000206 R12: 000000000043b6a0 R13: 0000000000000000 R14: 0000000000947a7c R15: 0000000000000000 Modules linked in: ---[ end trace 8297a29b1969266d ]--- RIP: 0010:compound_head include/linux/page-flags.h:184 [inline] RIP: 0010:put_page include/linux/mm.h:1229 [inline] RIP: 0010:__skb_frag_unref include/linux/skbuff.h:3089 [inline] RIP: 0010:skb_release_data+0x3a0/0x750 net/core/skbuff.c:667 Code: 48 8b 04 24 48 c1 e8 03 42 80 3c 30 00 0f 85 d3 02 00 00 49 63 c4 48 c1 e0 04 4a 8b 6c 28 30 48 8d 7d 08 48 89 f8 48 c1 e8 03 <42> 80 3c 30 00 0f 85 a7 02 00 00 48 8b 45 08 31 ff 48 89 c3 48 89 RSP: 0018:ffffc9000188f960 EFLAGS: 00010202 RAX: 00000000400dbd01 RBX: 0000000000000011 RCX: 0000000000000000 RDX: ffff888024b90000 RSI: ffffffff8703c746 RDI: 00000002006de808 RBP: 00000002006de800 R08: 0000000000000011 R09: ffffffff90207957 R10: ffffffff8703c733 R11: 0000000000000009 R12: 0000000000000010 R13: ffff88802e8e7ecc R14: dffffc0000000000 R15: ffff8880293dac80 FS: 0000000000000000(0000) GS:ffff8880b9c00000(0000) knlGS:0000000000000000 CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033 CR2: 000000c0004e8000 CR3: 000000000bc8e000 CR4: 00000000001506f0 DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000 DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400