============================= WARNING: suspicious RCU usage syz3: Invalid MTU 225897 requested, hw max 65535 SELinux: failure in selinux_parse_skb(), unable to parse packet BUG: unable to handle kernel NULL pointer dereference at 0000000000000074 IP: virt_to_cache mm/slab.c:400 [inline] IP: kfree+0xb2/0x250 mm/slab.c:3802 PGD 1cb7eb067 P4D 1cb7eb067 PUD 1c4604067 PMD 0 Oops: 0000 [#1] SMP KASAN Dumping ftrace buffer: (ftrace buffer empty) Modules linked in: CPU: 1 PID: 12515 Comm: syz-executor5 Not tainted 4.14.0+ #129 Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011 task: ffff8801a1c40440 task.stack: ffff8801d0658000 RIP: 0010:virt_to_cache mm/slab.c:400 [inline] RIP: 0010:kfree+0xb2/0x250 mm/slab.c:3802 RSP: 0018:ffff8801d065f820 EFLAGS: 00010046 RAX: 0000000000000000 RBX: ffff8801d065f9e8 RCX: ffffffffffffffff RDX: ffffea00074197c0 RSI: 0000000000000000 RDI: ffff8801d065f9e8 RBP: ffff8801d065f840 R08: ffffed003b63f714 R09: 0000000000000000 R10: 0000000000000001 R11: ffffed003b63f713 R12: 0000000000000286 R13: 0000000000000000 R14: ffff8801d065f9e8 R15: ffff8801d065f950 FS: 00007fd73b11f700(0000) GS:ffff8801db500000(0000) knlGS:0000000000000000 CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033 CR2: 0000000000000074 CR3: 00000001c92ac000 CR4: 00000000001406e0 DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000 DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400 Call Trace: blkcipher_walk_done+0x72b/0xde0 crypto/blkcipher.c:139 encrypt+0x50a/0xaf0 crypto/salsa20_generic.c:208 skcipher_crypt_blkcipher crypto/skcipher.c:619 [inline] skcipher_decrypt_blkcipher+0x213/0x310 crypto/skcipher.c:637 crypto_skcipher_decrypt include/crypto/skcipher.h:463 [inline] _skcipher_recvmsg crypto/algif_skcipher.c:133 [inline] skcipher_recvmsg+0xb06/0xf30 crypto/algif_skcipher.c:164 sock_recvmsg_nosec net/socket.c:805 [inline] sock_recvmsg+0xc9/0x110 net/socket.c:812 sock_read_iter+0x361/0x560 net/socket.c:889 call_read_iter include/linux/fs.h:1766 [inline] new_sync_read fs/read_write.c:401 [inline] __vfs_read+0x6ad/0xa00 fs/read_write.c:413 vfs_read+0x124/0x360 fs/read_write.c:447 SYSC_read fs/read_write.c:573 [inline] SyS_read+0xef/0x220 fs/read_write.c:566 entry_SYSCALL_64_fastpath+0x1f/0x96 RIP: 0033:0x452879 RSP: 002b:00007fd73b11ebe8 EFLAGS: 00000212 ORIG_RAX: 0000000000000000 RAX: ffffffffffffffda RBX: 00000000007580d8 RCX: 0000000000452879 RDX: 000000000000003b RSI: 0000000020f74000 RDI: 0000000000000017 RBP: 0000000000000086 R08: 0000000000000000 R09: 0000000000000000 R10: 0000000000000000 R11: 0000000000000212 R12: 00000000006ed310 R13: 00000000ffffffff R14: 00007fd73b11f6d4 R15: 0000000000000012 Code: c2 48 b8 00 00 00 00 00 ea ff ff 48 89 df 48 c1 ea 0c 48 c1 e2 06 48 01 c2 48 8b 42 20 48 8d 48 ff a8 01 48 0f 45 d1 4c 8b 6a 30 <49> 63 75 74 e8 e5 73 af ff 48 89 de 4c 89 ef 4c 8b 75 08 e8 06 RIP: virt_to_cache mm/slab.c:400 [inline] RSP: ffff8801d065f820 RIP: kfree+0xb2/0x250 mm/slab.c:3802 RSP: ffff8801d065f820 CR2: 0000000000000074 ---[ end trace 6d6ea6d6a72fd789 ]---