Oops: general protection fault, probably for non-canonical address 0xec6caa6dc4060606: 0000 [#1] PREEMPT SMP KASAN PTI KASAN: maybe wild-memory-access in range [0x6365736e20303030-0x6365736e20303037] CPU: 1 UID: 0 PID: 6713 Comm: syz.5.112 Not tainted 6.12.0-rc5-next-20241030-syzkaller #0 Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 09/13/2024 RIP: 0010:skb_zcopy_clear include/linux/skbuff.h:1815 [inline] RIP: 0010:skb_release_data+0x322/0x8a0 net/core/skbuff.c:1113 Code: db 74 7a 48 89 de 48 83 e6 01 31 ff e8 57 28 0e f8 48 89 d8 48 83 e0 01 0f 85 18 02 00 00 e8 65 23 0e f8 48 89 d8 48 c1 e8 03 <42> 80 3c 38 00 74 08 48 89 df e8 ff 5b 78 f8 4c 8b 3b 4c 89 f8 48 RSP: 0018:ffffc9000c7070d0 EFLAGS: 00010206 RAX: 0c6cae6dc4060606 RBX: 6365736e20303030 RCX: 0000000000040000 RDX: ffffc9000ce11000 RSI: 0000000000012a8d RDI: 0000000000012a8e RBP: ffff88805e298768 R08: ffffffff8986ffb9 R09: 1ffffffff2039fee R10: dffffc0000000000 R11: fffffbfff2039fef R12: 0000000000000010 R13: ffff88805e298740 R14: ffff88801ff5fa00 R15: dffffc0000000000 FS: 00007eff4b54b6c0(0000) GS:ffff8880b8700000(0000) knlGS:0000000000000000 CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033 CR2: 000000110c364ac4 CR3: 000000006d4d8000 CR4: 00000000003526f0 DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000 DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400 Call Trace: skb_release_all net/core/skbuff.c:1190 [inline] __kfree_skb net/core/skbuff.c:1204 [inline] sk_skb_reason_drop+0x1c9/0x380 net/core/skbuff.c:1242 kfree_skb_reason include/linux/skbuff.h:1262 [inline] kfree_skb include/linux/skbuff.h:1271 [inline] __ip_flush_pending_frames net/ipv4/ip_output.c:1538 [inline] ip_flush_pending_frames+0x12d/0x260 net/ipv4/ip_output.c:1545 udp_flush_pending_frames net/ipv4/udp.c:829 [inline] udp_sendmsg+0x5d2/0x2a50 net/ipv4/udp.c:1302 sock_sendmsg_nosec net/socket.c:729 [inline] __sock_sendmsg+0x1a6/0x270 net/socket.c:744 sock_sendmsg+0x134/0x200 net/socket.c:767 splice_to_socket+0xa10/0x10b0 fs/splice.c:889 do_splice_from fs/splice.c:941 [inline] direct_splice_actor+0x11b/0x220 fs/splice.c:1164 splice_direct_to_actor+0x586/0xc80 fs/splice.c:1108 do_splice_direct_actor fs/splice.c:1207 [inline] do_splice_direct+0x289/0x3e0 fs/splice.c:1233 do_sendfile+0x561/0xe10 fs/read_write.c:1388 __do_sys_sendfile64 fs/read_write.c:1455 [inline] __se_sys_sendfile64+0x17c/0x1e0 fs/read_write.c:1441 do_syscall_x64 arch/x86/entry/common.c:52 [inline] do_syscall_64+0xf3/0x230 arch/x86/entry/common.c:83 entry_SYSCALL_64_after_hwframe+0x77/0x7f RIP: 0033:0x7eff4a77e719 Code: ff ff c3 66 2e 0f 1f 84 00 00 00 00 00 0f 1f 40 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 73 01 c3 48 c7 c1 a8 ff ff ff f7 d8 64 89 01 48 RSP: 002b:00007eff4b54b038 EFLAGS: 00000246 ORIG_RAX: 0000000000000028 RAX: ffffffffffffffda RBX: 00007eff4a936208 RCX: 00007eff4a77e719 RDX: 0000000000000000 RSI: 0000000000000005 RDI: 0000000000000006 RBP: 00007eff4a7f132e R08: 0000000000000000 R09: 0000000000000000 R10: 0000020000023893 R11: 0000000000000246 R12: 0000000000000000 R13: 0000000000000000 R14: 00007eff4a936208 R15: 00007fff69340058 Modules linked in: ---[ end trace 0000000000000000 ]--- RIP: 0010:skb_zcopy_clear include/linux/skbuff.h:1815 [inline] RIP: 0010:skb_release_data+0x322/0x8a0 net/core/skbuff.c:1113 Code: db 74 7a 48 89 de 48 83 e6 01 31 ff e8 57 28 0e f8 48 89 d8 48 83 e0 01 0f 85 18 02 00 00 e8 65 23 0e f8 48 89 d8 48 c1 e8 03 <42> 80 3c 38 00 74 08 48 89 df e8 ff 5b 78 f8 4c 8b 3b 4c 89 f8 48 RSP: 0018:ffffc9000c7070d0 EFLAGS: 00010206 RAX: 0c6cae6dc4060606 RBX: 6365736e20303030 RCX: 0000000000040000 RDX: ffffc9000ce11000 RSI: 0000000000012a8d RDI: 0000000000012a8e RBP: ffff88805e298768 R08: ffffffff8986ffb9 R09: 1ffffffff2039fee R10: dffffc0000000000 R11: fffffbfff2039fef R12: 0000000000000010 R13: ffff88805e298740 R14: ffff88801ff5fa00 R15: dffffc0000000000 FS: 00007eff4b54b6c0(0000) GS:ffff8880b8600000(0000) knlGS:0000000000000000 CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033 CR2: 00007f2c06f86d9d CR3: 000000006d4d8000 CR4: 00000000003526f0 DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000 DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400 ---------------- Code disassembly (best guess): 0: db 74 7a 48 (bad) 0x48(%rdx,%rdi,2) 4: 89 de mov %ebx,%esi 6: 48 83 e6 01 and $0x1,%rsi a: 31 ff xor %edi,%edi c: e8 57 28 0e f8 call 0xf80e2868 11: 48 89 d8 mov %rbx,%rax 14: 48 83 e0 01 and $0x1,%rax 18: 0f 85 18 02 00 00 jne 0x236 1e: e8 65 23 0e f8 call 0xf80e2388 23: 48 89 d8 mov %rbx,%rax 26: 48 c1 e8 03 shr $0x3,%rax * 2a: 42 80 3c 38 00 cmpb $0x0,(%rax,%r15,1) <-- trapping instruction 2f: 74 08 je 0x39 31: 48 89 df mov %rbx,%rdi 34: e8 ff 5b 78 f8 call 0xf8785c38 39: 4c 8b 3b mov (%rbx),%r15 3c: 4c 89 f8 mov %r15,%rax 3f: 48 rex.W