pkg/report: skip crypto frames for KMSAN reports

This bug is at least one case where we merge several different KMSAN
reports because they end up being triggered in the same generic code:
https://syzkaller.appspot.com/bug?id=6290a184e96e8fb4b657700adcd243ef195113e1

Skip some common symbols from crypto/ so that the titles become more
specific.

Author: a-nogikh

pkg/report/linux.go

@@ -1511,7 +1511,11 @@ var linuxOopses = append([]*oops{
 						compile("(Local variable .* created at:|Uninit was created at:)"),
 						parseStackTrace,
 					},
-					skip: []string{"alloc_skb", "netlink_ack", "netlink_rcv_skb"},
+					skip: []string{
+						"alloc_skb", "netlink_ack", "netlink_rcv_skb",
+						// Encryption routines are the place where we hit the bug, but
+						// the generic code is a bad candidate for bug titles.
+						"_encrypt$", "^(?:crypto|cipher|drbg|rng)_"},
 				},
 				noStackTrace: true,
 			},

pkg/report/testdata/linux/report/699

@@ -1,5 +1,5 @@
-TITLE: KMSAN: uninit-value in aes_encrypt
-ALT: bad-access in aes_encrypt
+TITLE: KMSAN: uninit-value in fscrypt_crypt_block
+ALT: bad-access in fscrypt_crypt_block
 TYPE: KMSAN-UNINIT-VALUE
 
 [  311.903743][ T5388] =====================================================

pkg/report/testdata/linux/report/751

@@ -0,0 +1,180 @@
+TITLE: KMSAN: uninit-value in alg_setkey
+ALT: bad-access in alg_setkey
+TYPE: KMSAN-UNINIT-VALUE
+EXECUTOR: proc=2, id=690
+
+
+=====================================================
+BUG: KMSAN: uninit-value in aes_encrypt+0x1239/0x1960
+ aes_encrypt+0x1239/0x1960
+ aesti_encrypt+0x7d/0xf0
+ cipher_crypt_one+0x120/0x2e0
+ crypto_cipher_encrypt_one+0x33/0x40
+ drbg_ctr_update+0x19a9/0x3700
+ drbg_seed+0xb1e/0xe20
+ drbg_kcapi_seed+0x19b2/0x1e40
+ crypto_rng_reset+0x193/0x250
+ rng_setkey+0x52/0x70
+ alg_setkey+0x265/0x3b0
+ alg_setsockopt+0x503/0x760
+ __sys_setsockopt+0x43e/0x580
+ __x64_sys_setsockopt+0xf4/0x1a0
+ x64_sys_call+0x27c9/0x3e30
+ do_syscall_64+0xd9/0x210
+ entry_SYSCALL_64_after_hwframe+0x77/0x7f
+
+<Zero or more stacks not recorded to save memory>
+
+Uninit was stored to memory at:
+ crypto_sha3_finup+0x136/0xe00
+ crypto_shash_finup+0x327/0xe80
+ jent_hash_time+0x247/0x590
+ jent_condition_data+0x4f0/0x510
+ jent_measure_jitter+0x547/0x770
+ jent_gen_entropy+0x209/0x450
+ jent_read_entropy+0x353/0xeb0
+ jent_kcapi_random+0x6c/0x250
+ drbg_seed+0x3f5/0xe20
+ drbg_kcapi_seed+0x19b2/0x1e40
+ crypto_rng_reset+0x193/0x250
+ rng_setkey+0x52/0x70
+ alg_setkey+0x265/0x3b0
+ alg_setsockopt+0x503/0x760
+ __sys_setsockopt+0x43e/0x580
+ __x64_sys_setsockopt+0xf4/0x1a0
+ x64_sys_call+0x27c9/0x3e30
+ do_syscall_64+0xd9/0x210
+ entry_SYSCALL_64_after_hwframe+0x77/0x7f
+
+Uninit was stored to memory at:
+ crypto_shash_finup+0xc5a/0xe80
+ jent_hash_time+0x1de/0x590
+ jent_condition_data+0x4f0/0x510
+ jent_measure_jitter+0x547/0x770
+ jent_gen_entropy+0x209/0x450
+ jent_read_entropy+0x353/0xeb0
+ jent_kcapi_random+0x6c/0x250
+ drbg_seed+0x3f5/0xe20
+ drbg_kcapi_seed+0x19b2/0x1e40
+ crypto_rng_reset+0x193/0x250
+ rng_setkey+0x52/0x70
+ alg_setkey+0x265/0x3b0
+ alg_setsockopt+0x503/0x760
+ __sys_setsockopt+0x43e/0x580
+ __x64_sys_setsockopt+0xf4/0x1a0
+ x64_sys_call+0x27c9/0x3e30
+ do_syscall_64+0xd9/0x210
+ entry_SYSCALL_64_after_hwframe+0x77/0x7f
+
+Uninit was stored to memory at:
+ crypto_sha3_finup+0xc98/0xe00
+ crypto_shash_finup+0x327/0xe80
+ jent_hash_time+0x247/0x590
+ jent_condition_data+0x4f0/0x510
+ jent_measure_jitter+0x547/0x770
+ jent_gen_entropy+0x209/0x450
+ jent_read_entropy+0x353/0xeb0
+ jent_kcapi_random+0x6c/0x250
+ drbg_seed+0x3f5/0xe20
+ drbg_kcapi_seed+0x19b2/0x1e40
+ crypto_rng_reset+0x193/0x250
+ rng_setkey+0x52/0x70
+ alg_setkey+0x265/0x3b0
+ alg_setsockopt+0x503/0x760
+ __sys_setsockopt+0x43e/0x580
+ __x64_sys_setsockopt+0xf4/0x1a0
+ x64_sys_call+0x27c9/0x3e30
+ do_syscall_64+0xd9/0x210
+ entry_SYSCALL_64_after_hwframe+0x77/0x7f
+
+Uninit was stored to memory at:
+ keccakf+0x1efb/0x2110
+ crypto_sha3_finup+0x772/0xe00
+ crypto_shash_finup+0x327/0xe80
+ jent_hash_time+0x247/0x590
+ jent_condition_data+0x4f0/0x510
+ jent_measure_jitter+0x547/0x770
+ jent_gen_entropy+0x209/0x450
+ jent_read_entropy+0x353/0xeb0
+ jent_kcapi_random+0x6c/0x250
+ drbg_seed+0x3f5/0xe20
+ drbg_kcapi_seed+0x19b2/0x1e40
+ crypto_rng_reset+0x193/0x250
+ rng_setkey+0x52/0x70
+ alg_setkey+0x265/0x3b0
+ alg_setsockopt+0x503/0x760
+ __sys_setsockopt+0x43e/0x580
+ __x64_sys_setsockopt+0xf4/0x1a0
+ x64_sys_call+0x27c9/0x3e30
+ do_syscall_64+0xd9/0x210
+ entry_SYSCALL_64_after_hwframe+0x77/0x7f
+
+Uninit was stored to memory at:
+ crypto_sha3_finup+0x5be/0xe00
+ crypto_shash_finup+0x327/0xe80
+ jent_hash_time+0x247/0x590
+ jent_condition_data+0x4f0/0x510
+ jent_measure_jitter+0x547/0x770
+ jent_gen_entropy+0x209/0x450
+ jent_read_entropy+0x353/0xeb0
+ jent_kcapi_random+0x6c/0x250
+ drbg_seed+0x3f5/0xe20
+ drbg_kcapi_seed+0x19b2/0x1e40
+ crypto_rng_reset+0x193/0x250
+ rng_setkey+0x52/0x70
+ alg_setkey+0x265/0x3b0
+ alg_setsockopt+0x503/0x760
+ __sys_setsockopt+0x43e/0x580
+ __x64_sys_setsockopt+0xf4/0x1a0
+ x64_sys_call+0x27c9/0x3e30
+ do_syscall_64+0xd9/0x210
+ entry_SYSCALL_64_after_hwframe+0x77/0x7f
+
+Uninit was stored to memory at:
+ crypto_sha3_finup+0x136/0xe00
+ crypto_shash_finup+0x327/0xe80
+ jent_hash_time+0x247/0x590
+ jent_condition_data+0x4f0/0x510
+ jent_measure_jitter+0x547/0x770
+ jent_gen_entropy+0x209/0x450
+ jent_read_entropy+0x353/0xeb0
+ jent_kcapi_random+0x6c/0x250
+ drbg_seed+0x3f5/0xe20
+ drbg_kcapi_seed+0x19b2/0x1e40
+ crypto_rng_reset+0x193/0x250
+ rng_setkey+0x52/0x70
+ alg_setkey+0x265/0x3b0
+ alg_setsockopt+0x503/0x760
+ __sys_setsockopt+0x43e/0x580
+ __x64_sys_setsockopt+0xf4/0x1a0
+ x64_sys_call+0x27c9/0x3e30
+ do_syscall_64+0xd9/0x210
+ entry_SYSCALL_64_after_hwframe+0x77/0x7f
+
+Uninit was stored to memory at:
+ crypto_shash_finup+0xc5a/0xe80
+ jent_hash_time+0x1de/0x590
+ jent_condition_data+0x4f0/0x510
+ jent_measure_jitter+0x547/0x770
+ jent_gen_entropy+0x209/0x450
+ jent_read_entropy+0x353/0xeb0
+ jent_kcapi_random+0x6c/0x250
+ drbg_seed+0x3f5/0xe20
+ drbg_kcapi_seed+0x19b2/0x1e40
+ crypto_rng_reset+0x193/0x250
+ rng_setkey+0x52/0x70
+ alg_setkey+0x265/0x3b0
+ alg_setsockopt+0x503/0x760
+ __sys_setsockopt+0x43e/0x580
+ __x64_sys_setsockopt+0xf4/0x1a0
+ x64_sys_call+0x27c9/0x3e30
+ do_syscall_64+0xd9/0x210
+ entry_SYSCALL_64_after_hwframe+0x77/0x7f
+
+Local variable intermediary created at:
+ jent_hash_time+0x9b/0x590
+ jent_condition_data+0x4f0/0x510
+
+CPU: 0 UID: 0 PID: 8436 Comm: syz.2.690 Not tainted syzkaller #0 PREEMPT(none) 
+Hardware name: QEMU Standard PC (Q35 + ICH9, 2009), BIOS 1.16.2-debian-1.16.2-1 04/01/2014
+=====================================================