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KMSAN: uninit-value in vmac_setkey

Status: closed as invalid on 2018/06/27 15:08
Subsystems: crypto
[Documentation on labels]
First crash: 2700d, last: 2685d

Sample crash report:
==================================================================
BUG: KMSAN: uninit-value in __arch_swab64 arch/x86/include/uapi/asm/swab.h:31 [inline]
BUG: KMSAN: uninit-value in __fswab64 include/uapi/linux/swab.h:68 [inline]
BUG: KMSAN: uninit-value in __swab64p include/uapi/linux/swab.h:192 [inline]
BUG: KMSAN: uninit-value in __be64_to_cpup include/uapi/linux/byteorder/little_endian.h:74 [inline]
BUG: KMSAN: uninit-value in vmac_set_key crypto/vmac.c:502 [inline]
BUG: KMSAN: uninit-value in vmac_setkey+0x337/0x940 crypto/vmac.c:554
CPU: 1 PID: 3574 Comm: syzkaller839178 Not tainted 4.16.0+ #82
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011
Call Trace:
 __dump_stack lib/dump_stack.c:17 [inline]
 dump_stack+0x185/0x1d0 lib/dump_stack.c:53
 kmsan_report+0x142/0x240 mm/kmsan/kmsan.c:1067
 __msan_warning_32+0x6c/0xb0 mm/kmsan/kmsan_instr.c:676
 __arch_swab64 arch/x86/include/uapi/asm/swab.h:31 [inline]
 __fswab64 include/uapi/linux/swab.h:68 [inline]
 __swab64p include/uapi/linux/swab.h:192 [inline]
 __be64_to_cpup include/uapi/linux/byteorder/little_endian.h:74 [inline]
 vmac_set_key crypto/vmac.c:502 [inline]
 vmac_setkey+0x337/0x940 crypto/vmac.c:554
 crypto_shash_setkey crypto/shash.c:66 [inline]
 shash_async_setkey+0x337/0x4c0 crypto/shash.c:218
 crypto_ahash_setkey+0x31a/0x470 crypto/ahash.c:201
 hash_setkey+0x8b/0xa0 crypto/algif_hash.c:420
 alg_setkey crypto/af_alg.c:223 [inline]
 alg_setsockopt+0x6c5/0x740 crypto/af_alg.c:256
 SYSC_setsockopt+0x4b8/0x570 net/socket.c:1849
 SyS_setsockopt+0x76/0xa0 net/socket.c:1828
 do_syscall_64+0x309/0x430 arch/x86/entry/common.c:287
 entry_SYSCALL_64_after_hwframe+0x3d/0xa2
RIP: 0033:0x43fdb9
RSP: 002b:00007ffc17c49618 EFLAGS: 00000217 ORIG_RAX: 0000000000000036
RAX: ffffffffffffffda RBX: 00000000004002c8 RCX: 000000000043fdb9
RDX: 0000000000000001 RSI: 0000000000000117 RDI: 0000000000000003
RBP: 00000000006ca018 R08: 0000000000000010 R09: 00000000004002c8
R10: 0000000020f3eff0 R11: 0000000000000217 R12: 00000000004016e0
R13: 0000000000401770 R14: 0000000000000000 R15: 0000000000000000

Local variable description: ----out.i@vmac_setkey
Variable was created at:
 vmac_setkey+0x93/0x940 crypto/vmac.c:546
 crypto_shash_setkey crypto/shash.c:66 [inline]
 shash_async_setkey+0x337/0x4c0 crypto/shash.c:218
==================================================================
Kernel panic - not syncing: panic_on_warn set ...

CPU: 1 PID: 3574 Comm: syzkaller839178 Tainted: G    B            4.16.0+ #82
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011
Call Trace:
 __dump_stack lib/dump_stack.c:17 [inline]
 dump_stack+0x185/0x1d0 lib/dump_stack.c:53
 panic+0x39d/0x940 kernel/panic.c:183
 kmsan_report+0x238/0x240 mm/kmsan/kmsan.c:1083
 __msan_warning_32+0x6c/0xb0 mm/kmsan/kmsan_instr.c:676
 __arch_swab64 arch/x86/include/uapi/asm/swab.h:31 [inline]
 __fswab64 include/uapi/linux/swab.h:68 [inline]
 __swab64p include/uapi/linux/swab.h:192 [inline]
 __be64_to_cpup include/uapi/linux/byteorder/little_endian.h:74 [inline]
 vmac_set_key crypto/vmac.c:502 [inline]
 vmac_setkey+0x337/0x940 crypto/vmac.c:554
 crypto_shash_setkey crypto/shash.c:66 [inline]
 shash_async_setkey+0x337/0x4c0 crypto/shash.c:218
 crypto_ahash_setkey+0x31a/0x470 crypto/ahash.c:201
 hash_setkey+0x8b/0xa0 crypto/algif_hash.c:420
 alg_setkey crypto/af_alg.c:223 [inline]
 alg_setsockopt+0x6c5/0x740 crypto/af_alg.c:256
 SYSC_setsockopt+0x4b8/0x570 net/socket.c:1849
 SyS_setsockopt+0x76/0xa0 net/socket.c:1828
 do_syscall_64+0x309/0x430 arch/x86/entry/common.c:287
 entry_SYSCALL_64_after_hwframe+0x3d/0xa2
RIP: 0033:0x43fdb9
RSP: 002b:00007ffc17c49618 EFLAGS: 00000217 ORIG_RAX: 0000000000000036
RAX: ffffffffffffffda RBX: 00000000004002c8 RCX: 000000000043fdb9
RDX: 0000000000000001 RSI: 0000000000000117 RDI: 0000000000000003
RBP: 00000000006ca018 R08: 0000000000000010 R09: 00000000004002c8
R10: 0000000020f3eff0 R11: 0000000000000217 R12: 00000000004016e0
R13: 0000000000401770 R14: 0000000000000000 R15: 0000000000000000
Dumping ftrace buffer:
   (ftrace buffer empty)
Kernel Offset: disabled
Rebooting in 86400 seconds..

Crashes (200):
Time Kernel Commit Syzkaller Config Log Report Syz repro C repro VM info Assets (help?) Manager Title
2018/04/07 13:22 https://github.com/google/kmsan.git master e2ab7e8abba4 66f22a7f .config console log report syz C ci-upstream-kmsan-gce
2018/04/21 13:24 https://github.com/google/kmsan.git master 48c6a2b0ab1b d23fcf6c .config console log report ci-upstream-kmsan-gce
2018/04/21 01:58 https://github.com/google/kmsan.git master 48c6a2b0ab1b ca03d688 .config console log report ci-upstream-kmsan-gce
2018/04/20 18:40 https://github.com/google/kmsan.git master 48c6a2b0ab1b cc402841 .config console log report ci-upstream-kmsan-gce
2018/04/20 14:04 https://github.com/google/kmsan.git master 48c6a2b0ab1b cc402841 .config console log report ci-upstream-kmsan-gce
2018/04/20 02:34 https://github.com/google/kmsan.git master 48c6a2b0ab1b eae05cb0 .config console log report ci-upstream-kmsan-gce
2018/04/19 22:55 https://github.com/google/kmsan.git master 48c6a2b0ab1b 3642839c .config console log report ci-upstream-kmsan-gce
2018/04/19 17:23 https://github.com/google/kmsan.git master 48c6a2b0ab1b 3642839c .config console log report ci-upstream-kmsan-gce
2018/04/19 13:11 https://github.com/google/kmsan.git master 48c6a2b0ab1b 3642839c .config console log report ci-upstream-kmsan-gce
2018/04/19 10:40 https://github.com/google/kmsan.git master 48c6a2b0ab1b d1b2ef69 .config console log report ci-upstream-kmsan-gce
2018/04/19 09:21 https://github.com/google/kmsan.git master 48c6a2b0ab1b d1b2ef69 .config console log report ci-upstream-kmsan-gce
2018/04/19 06:46 https://github.com/google/kmsan.git master 48c6a2b0ab1b 829f0234 .config console log report ci-upstream-kmsan-gce
2018/04/19 05:04 https://github.com/google/kmsan.git master 48c6a2b0ab1b 829f0234 .config console log report ci-upstream-kmsan-gce
2018/04/19 03:25 https://github.com/google/kmsan.git master 48c6a2b0ab1b 829f0234 .config console log report ci-upstream-kmsan-gce
2018/04/19 01:35 https://github.com/google/kmsan.git master 48c6a2b0ab1b 829f0234 .config console log report ci-upstream-kmsan-gce
2018/04/18 20:23 https://github.com/google/kmsan.git master 48c6a2b0ab1b 829f0234 .config console log report ci-upstream-kmsan-gce
2018/04/18 12:22 https://github.com/google/kmsan.git master 48c6a2b0ab1b 52643b44 .config console log report ci-upstream-kmsan-gce
2018/04/18 09:15 https://github.com/google/kmsan.git master 48c6a2b0ab1b 52643b44 .config console log report ci-upstream-kmsan-gce
2018/04/18 01:19 https://github.com/google/kmsan.git master 48c6a2b0ab1b b80fd3b5 .config console log report ci-upstream-kmsan-gce
2018/04/17 05:37 https://github.com/google/kmsan.git master 48c6a2b0ab1b b80fd3b5 .config console log report ci-upstream-kmsan-gce
2018/04/16 23:06 https://github.com/google/kmsan.git master 48c6a2b0ab1b b80fd3b5 .config console log report ci-upstream-kmsan-gce
2018/04/16 20:45 https://github.com/google/kmsan.git master 48c6a2b0ab1b 802ac912 .config console log report ci-upstream-kmsan-gce
2018/04/16 19:01 https://github.com/google/kmsan.git master 48c6a2b0ab1b 802ac912 .config console log report ci-upstream-kmsan-gce
2018/04/16 14:35 https://github.com/google/kmsan.git master 48c6a2b0ab1b 802ac912 .config console log report ci-upstream-kmsan-gce
2018/04/16 11:05 https://github.com/google/kmsan.git master 48c6a2b0ab1b 802ac912 .config console log report ci-upstream-kmsan-gce
2018/04/16 05:02 https://github.com/google/kmsan.git master 35ff515e4bda 7a67784c .config console log report ci-upstream-kmsan-gce
2018/04/15 01:53 https://github.com/google/kmsan.git master 35ff515e4bda 7a67784c .config console log report ci-upstream-kmsan-gce
2018/04/14 12:43 https://github.com/google/kmsan.git master 35ff515e4bda 7a67784c .config console log report ci-upstream-kmsan-gce
2018/04/14 01:53 https://github.com/google/kmsan.git master 35ff515e4bda 7a67784c .config console log report ci-upstream-kmsan-gce
2018/04/13 22:48 https://github.com/google/kmsan.git master 35ff515e4bda 7a67784c .config console log report ci-upstream-kmsan-gce
2018/04/13 19:18 https://github.com/google/kmsan.git master 35ff515e4bda 0a0c5db6 .config console log report ci-upstream-kmsan-gce
2018/04/13 17:10 https://github.com/google/kmsan.git master 35ff515e4bda 0a0c5db6 .config console log report ci-upstream-kmsan-gce
2018/04/13 13:50 https://github.com/google/kmsan.git master 35ff515e4bda 0a0c5db6 .config console log report ci-upstream-kmsan-gce
2018/04/13 11:55 https://github.com/google/kmsan.git master 35ff515e4bda 0a0c5db6 .config console log report ci-upstream-kmsan-gce
2018/04/13 09:09 https://github.com/google/kmsan.git master 35ff515e4bda 0a0c5db6 .config console log report ci-upstream-kmsan-gce
2018/04/13 07:13 https://github.com/google/kmsan.git master 35ff515e4bda eb2295de .config console log report ci-upstream-kmsan-gce
2018/04/13 05:13 https://github.com/google/kmsan.git master 35ff515e4bda eb2295de .config console log report ci-upstream-kmsan-gce
2018/04/12 13:03 https://github.com/google/kmsan.git master 35ff515e4bda 9cd56d71 .config console log report ci-upstream-kmsan-gce
2018/04/12 04:57 https://github.com/google/kmsan.git master 35ff515e4bda 9cd56d71 .config console log report ci-upstream-kmsan-gce
2018/04/11 20:57 https://github.com/google/kmsan.git master 35ff515e4bda 9cd56d71 .config console log report ci-upstream-kmsan-gce
2018/04/11 15:28 https://github.com/google/kmsan.git master 35ff515e4bda 8b8de427 .config console log report ci-upstream-kmsan-gce
2018/04/11 10:00 https://github.com/google/kmsan.git master 35ff515e4bda 8b8de427 .config console log report ci-upstream-kmsan-gce
2018/04/10 23:25 https://github.com/google/kmsan.git master 35ff515e4bda 8b8de427 .config console log report ci-upstream-kmsan-gce
2018/04/10 21:40 https://github.com/google/kmsan.git master 35ff515e4bda 8b8de427 .config console log report ci-upstream-kmsan-gce
2018/04/10 18:54 https://github.com/google/kmsan.git master 35ff515e4bda 8b8de427 .config console log report ci-upstream-kmsan-gce
2018/04/10 13:49 https://github.com/google/kmsan.git master 35ff515e4bda 8e873e9d .config console log report ci-upstream-kmsan-gce
2018/04/10 10:00 https://github.com/google/kmsan.git master 35ff515e4bda b9f65507 .config console log report ci-upstream-kmsan-gce
2018/04/10 05:20 https://github.com/google/kmsan.git master e2ab7e8abba4 b9f65507 .config console log report ci-upstream-kmsan-gce
2018/04/10 03:45 https://github.com/google/kmsan.git master e2ab7e8abba4 b9f65507 .config console log report ci-upstream-kmsan-gce
2018/04/09 23:37 https://github.com/google/kmsan.git master e2ab7e8abba4 b9f65507 .config console log report ci-upstream-kmsan-gce
2018/04/09 20:57 https://github.com/google/kmsan.git master e2ab7e8abba4 b9f65507 .config console log report ci-upstream-kmsan-gce
2018/04/09 17:20 https://github.com/google/kmsan.git master e2ab7e8abba4 f13fb445 .config console log report ci-upstream-kmsan-gce
2018/04/09 15:53 https://github.com/google/kmsan.git master e2ab7e8abba4 f13fb445 .config console log report ci-upstream-kmsan-gce
2018/04/09 14:24 https://github.com/google/kmsan.git master e2ab7e8abba4 f13fb445 .config console log report ci-upstream-kmsan-gce
2018/04/09 12:23 https://github.com/google/kmsan.git master e2ab7e8abba4 f13fb445 .config console log report ci-upstream-kmsan-gce
2018/04/09 08:49 https://github.com/google/kmsan.git master e2ab7e8abba4 f13fb445 .config console log report ci-upstream-kmsan-gce
2018/04/09 01:40 https://github.com/google/kmsan.git master e2ab7e8abba4 77bd5117 .config console log report ci-upstream-kmsan-gce
2018/04/06 22:52 https://github.com/google/kmsan.git master e2ab7e8abba4 d613535f .config console log report ci-upstream-kmsan-gce
* Struck through repros no longer work on HEAD.