syzbot


KASAN: slab-out-of-bounds Write in crypto_sha3_final

Status: fixed on 2018/07/09 18:05
Subsystems: crypto
[Documentation on labels]
Fix commit: 3619dec5103d dh key: fix rounding up KDF output length
First crash: 2147d, last: 2128d
Similar bugs (1)
Kernel Title Repro Cause bisect Fix bisect Count Last Reported Patched Status
upstream KASAN: slab-out-of-bounds Write in crypto_sha3_final (2) crypto 1 299d 295d 0/26 auto-obsoleted due to no activity on 2023/10/08 00:09

Sample crash report:
random: sshd: uninitialized urandom read (32 bytes read)
random: sshd: uninitialized urandom read (32 bytes read)
random: sshd: uninitialized urandom read (32 bytes read)
random: sshd: uninitialized urandom read (32 bytes read)
==================================================================
BUG: KASAN: slab-out-of-bounds in put_unaligned_le64 include/linux/unaligned/access_ok.h:50 [inline]
BUG: KASAN: slab-out-of-bounds in crypto_sha3_final+0x416/0x450 crypto/sha3_generic.c:235
Write of size 8 at addr ffff8801d4821c5c by task syz-executor306/4525

CPU: 1 PID: 4525 Comm: syz-executor306 Not tainted 4.17.0+ #92
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011
Call Trace:
 __dump_stack lib/dump_stack.c:77 [inline]
 dump_stack+0x1b9/0x294 lib/dump_stack.c:113
 print_address_description+0x6c/0x20b mm/kasan/report.c:256
 kasan_report_error mm/kasan/report.c:354 [inline]
 kasan_report.cold.7+0x242/0x2fe mm/kasan/report.c:412
 __asan_report_store8_noabort+0x17/0x20 mm/kasan/report.c:438
 put_unaligned_le64 include/linux/unaligned/access_ok.h:50 [inline]
 crypto_sha3_final+0x416/0x450 crypto/sha3_generic.c:235
 crypto_shash_final+0x104/0x260 crypto/shash.c:152
 kdf_ctr security/keys/dh.c:186 [inline]
 keyctl_dh_compute_kdf security/keys/dh.c:217 [inline]
 __keyctl_dh_compute+0x1184/0x1bc0 security/keys/dh.c:389
 keyctl_dh_compute+0xb9/0x100 security/keys/dh.c:425
 __do_sys_keyctl security/keys/keyctl.c:1741 [inline]
 __se_sys_keyctl security/keys/keyctl.c:1637 [inline]
 __x64_sys_keyctl+0x12a/0x3b0 security/keys/keyctl.c:1637
 do_syscall_64+0x1b1/0x800 arch/x86/entry/common.c:287
 entry_SYSCALL_64_after_hwframe+0x49/0xbe
RIP: 0033:0x440019
Code: 18 89 d0 c3 66 2e 0f 1f 84 00 00 00 00 00 0f 1f 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 0f 83 6b 45 00 00 c3 66 2e 0f 1f 84 00 00 00 00 
RSP: 002b:00007ffe45fbd128 EFLAGS: 00000217 ORIG_RAX: 00000000000000fa
RAX: ffffffffffffffda RBX: 00000000004002c8 RCX: 0000000000440019
RDX: 0000000020000080 RSI: 00000000200001c0 RDI: 0000000000000017
RBP: 00000000006ca018 R08: 0000000020000200 R09: 00000000004002c8
R10: 0000000000000059 R11: 0000000000000217 R12: 0000000000401940
R13: 00000000004019d0 R14: 0000000000000000 R15: 0000000000000000

Allocated by task 4525:
 save_stack+0x43/0xd0 mm/kasan/kasan.c:448
 set_track mm/kasan/kasan.c:460 [inline]
 kasan_kmalloc+0xc4/0xe0 mm/kasan/kasan.c:553
 __do_kmalloc mm/slab.c:3718 [inline]
 __kmalloc+0x14e/0x760 mm/slab.c:3727
 kmalloc include/linux/slab.h:518 [inline]
 keyctl_dh_compute_kdf security/keys/dh.c:211 [inline]
 __keyctl_dh_compute+0xfe9/0x1bc0 security/keys/dh.c:389
 keyctl_dh_compute+0xb9/0x100 security/keys/dh.c:425
 __do_sys_keyctl security/keys/keyctl.c:1741 [inline]
 __se_sys_keyctl security/keys/keyctl.c:1637 [inline]
 __x64_sys_keyctl+0x12a/0x3b0 security/keys/keyctl.c:1637
 do_syscall_64+0x1b1/0x800 arch/x86/entry/common.c:287
 entry_SYSCALL_64_after_hwframe+0x49/0xbe

Freed by task 1:
 save_stack+0x43/0xd0 mm/kasan/kasan.c:448
 set_track mm/kasan/kasan.c:460 [inline]
 __kasan_slab_free+0x11a/0x170 mm/kasan/kasan.c:521
 kasan_slab_free+0xe/0x10 mm/kasan/kasan.c:528
 __cache_free mm/slab.c:3498 [inline]
 kfree+0xd9/0x260 mm/slab.c:3813
 acpi_os_free include/acpi/platform/aclinuxex.h:62 [inline]
 acpi_ut_evaluate_object+0x40e/0x425 drivers/acpi/acpica/uteval.c:151
 acpi_rs_get_method_data+0x92/0x12c drivers/acpi/acpica/rsutils.c:650
 acpi_walk_resources+0x118/0x1fc drivers/acpi/acpica/rsxface.c:616
 pnpacpi_parse_allocated_resource+0xc8/0x160 drivers/pnp/pnpacpi/rsparser.c:289
 pnpacpi_add_device drivers/pnp/pnpacpi/core.c:271 [inline]
 pnpacpi_add_device_handler+0x668/0x86b drivers/pnp/pnpacpi/core.c:308
 acpi_ns_get_device_callback+0x487/0x4c5 drivers/acpi/acpica/nsxfeval.c:740
 acpi_ns_walk_namespace+0x224/0x400 drivers/acpi/acpica/nswalk.c:237
 acpi_get_devices+0x144/0x184 drivers/acpi/acpica/nsxfeval.c:805
 pnpacpi_init+0x95/0xeb drivers/pnp/pnpacpi/core.c:321
 do_one_initcall+0x127/0x913 init/main.c:884
 do_initcall_level init/main.c:952 [inline]
 do_initcalls init/main.c:960 [inline]
 do_basic_setup init/main.c:978 [inline]
 kernel_init_freeable+0x49b/0x58e init/main.c:1135
 kernel_init+0x11/0x1b3 init/main.c:1061
 ret_from_fork+0x3a/0x50 arch/x86/entry/entry_64.S:412

The buggy address belongs to the object at ffff8801d4821c00
 which belongs to the cache kmalloc-96 of size 96
The buggy address is located 92 bytes inside of
 96-byte region [ffff8801d4821c00, ffff8801d4821c60)
The buggy address belongs to the page:
page:ffffea0007520840 count:1 mapcount:0 mapping:ffff8801da8004c0 index:0x0
flags: 0x2fffc0000000100(slab)
raw: 02fffc0000000100 ffffea00075b7c48 ffffea0007522e48 ffff8801da8004c0
raw: 0000000000000000 ffff8801d4821000 0000000100000020 0000000000000000
page dumped because: kasan: bad access detected

Memory state around the buggy address:
 ffff8801d4821b00: 00 00 00 00 00 00 00 00 00 00 fc fc fc fc fc fc
 ffff8801d4821b80: 00 00 00 00 00 00 00 00 00 00 fc fc fc fc fc fc
>ffff8801d4821c00: 00 00 00 00 00 00 00 00 00 00 00 04 fc fc fc fc
                                                    ^
 ffff8801d4821c80: 00 00 00 00 00 00 00 00 00 fc fc fc fc fc fc fc
 ffff8801d4821d00: 00 00 00 00 00 00 00 00 00 00 00 fc fc fc fc fc
==================================================================

Crashes (68):
Time Kernel Commit Syzkaller Config Log Report Syz repro C repro VM info Assets (help?) Manager Title
2018/06/09 12:08 upstream 7d3bf613e99a 866118af .config console log report syz C ci-upstream-kasan-gce-root
2018/06/08 06:34 upstream 68abbe729567 f7b27b7a .config console log report syz C ci-upstream-kasan-gce
2018/06/27 07:34 upstream 813835028e9a b0294c53 .config console log report ci-upstream-kasan-gce
2018/06/26 18:23 upstream 813835028e9a b0294c53 .config console log report ci-upstream-kasan-gce
2018/06/26 10:53 upstream 6f0d349d922b 2064fc5c .config console log report ci-upstream-kasan-gce
2018/06/26 03:52 upstream 6f0d349d922b 2064fc5c .config console log report ci-upstream-kasan-gce-root
2018/06/26 02:53 upstream 6f0d349d922b 2064fc5c .config console log report ci-upstream-kasan-gce
2018/06/25 21:58 upstream 6f0d349d922b 2064fc5c .config console log report ci-upstream-kasan-gce
2018/06/25 18:36 upstream 6f0d349d922b 2064fc5c .config console log report ci-upstream-kasan-gce-root
2018/06/25 13:10 upstream 6f0d349d922b 2064fc5c .config console log report ci-upstream-kasan-gce
2018/06/25 04:59 upstream 7daf201d7fe8 2064fc5c .config console log report ci-upstream-kasan-gce-root
2018/06/24 23:01 upstream 7daf201d7fe8 2064fc5c .config console log report ci-upstream-kasan-gce
2018/06/23 17:51 upstream 5e2204832b20 2064fc5c .config console log report ci-upstream-kasan-gce-root
2018/06/23 13:04 upstream 894b8c000ae6 2064fc5c .config console log report ci-upstream-kasan-gce
2018/06/22 09:55 upstream 27db64f65f1b 095ef806 .config console log report ci-upstream-kasan-gce
2018/06/22 08:26 upstream 27db64f65f1b 095ef806 .config console log report ci-upstream-kasan-gce-root
2018/06/21 16:44 upstream 1abd8a8f39cd 095ef806 .config console log report ci-upstream-kasan-gce
2018/06/21 09:28 upstream 1abd8a8f39cd 095ef806 .config console log report ci-upstream-kasan-gce
2018/06/21 06:57 upstream 1abd8a8f39cd 095ef806 .config console log report ci-upstream-kasan-gce
2018/06/21 03:48 upstream 1abd8a8f39cd 095ef806 .config console log report ci-upstream-kasan-gce
2018/06/21 01:39 upstream 1abd8a8f39cd 095ef806 .config console log report ci-upstream-kasan-gce-root
2018/06/20 04:20 upstream ba4dbdedd3ed 095ef806 .config console log report ci-upstream-kasan-gce
2018/06/19 18:41 upstream ba4dbdedd3ed 732e4256 .config console log report ci-upstream-kasan-gce
2018/06/19 18:29 upstream ba4dbdedd3ed 732e4256 .config console log report ci-upstream-kasan-gce
2018/06/19 17:56 upstream ba4dbdedd3ed 732e4256 .config console log report ci-upstream-kasan-gce
2018/06/18 20:20 upstream 9ffc59d57228 45c54f75 .config console log report ci-upstream-kasan-gce
2018/06/17 18:23 upstream ce397d215ccd 27c5f59f .config console log report ci-upstream-kasan-gce
2018/06/17 18:07 upstream ce397d215ccd 27c5f59f .config console log report ci-upstream-kasan-gce-root
2018/06/17 02:29 upstream 35773c93817c 27c5f59f .config console log report ci-upstream-kasan-gce
2018/06/17 02:04 upstream 35773c93817c 27c5f59f .config console log report ci-upstream-kasan-gce-root
2018/06/16 21:07 upstream 35773c93817c 27c5f59f .config console log report ci-upstream-kasan-gce
2018/06/16 16:50 upstream 35773c93817c 27c5f59f .config console log report ci-upstream-kasan-gce
2018/06/16 05:36 upstream 9215310cf13b 27c5f59f .config console log report ci-upstream-kasan-gce
2018/06/15 08:48 upstream b5d903c2d656 27c5f59f .config console log report ci-upstream-kasan-gce-root
2018/06/14 17:00 upstream 2837461dbe6f 27c5f59f .config console log report ci-upstream-kasan-gce
2018/06/27 06:32 upstream 813835028e9a b0294c53 .config console log report ci-upstream-kasan-gce-386
2018/06/27 00:12 upstream 813835028e9a b0294c53 .config console log report ci-upstream-kasan-gce-386
2018/06/26 14:00 upstream 6f0d349d922b 089f1181 .config console log report ci-upstream-kasan-gce-386
2018/06/26 00:16 upstream 6f0d349d922b 2064fc5c .config console log report ci-upstream-kasan-gce-386
2018/06/21 15:38 upstream 1abd8a8f39cd 095ef806 .config console log report ci-upstream-kasan-gce-386
2018/06/21 13:57 upstream 1abd8a8f39cd 095ef806 .config console log report ci-upstream-kasan-gce-386
2018/06/21 11:38 upstream 1abd8a8f39cd 095ef806 .config console log report ci-upstream-kasan-gce-386
2018/06/21 03:16 upstream 1abd8a8f39cd 095ef806 .config console log report ci-upstream-kasan-gce-386
2018/06/19 15:52 upstream ba4dbdedd3ed 732e4256 .config console log report ci-upstream-kasan-gce-386
2018/06/16 21:26 upstream 35773c93817c 27c5f59f .config console log report ci-upstream-kasan-gce-386
2018/06/16 16:09 upstream 9215310cf13b 27c5f59f .config console log report ci-upstream-kasan-gce-386
2018/06/16 08:18 upstream 9215310cf13b 27c5f59f .config console log report ci-upstream-kasan-gce-386
2018/06/16 00:15 upstream 4c5e8fc62d6a 27c5f59f .config console log report ci-upstream-kasan-gce-386
* Struck through repros no longer work on HEAD.