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KMSAN: kernel-infoleak in snd_pcm_oss_read

Status: closed as invalid on 2018/07/13 10:28
Subsystems: sound
[Documentation on labels]
First crash: 2134d, last: 2123d
▶ ▼ Similar bugs (2)
Kernel Title Repro Cause bisect Fix bisect Count Last Reported Patched Status
upstream KMSAN: kernel-infoleak in snd_pcm_oss_read (2) sound C 26 2123d 2123d 0/26 closed as invalid on 2018/09/12 11:11
upstream KMSAN: kernel-infoleak in snd_pcm_oss_read (3) sound C 14 1891d 1941d 0/26 closed as invalid on 2019/03/28 15:13

Sample crash report:
==================================================================
BUG: KMSAN: kernel-infoleak in copy_to_user include/linux/uaccess.h:184 [inline]
BUG: KMSAN: kernel-infoleak in snd_pcm_oss_read1 sound/core/oss/pcm_oss.c:1522 [inline]
BUG: KMSAN: kernel-infoleak in snd_pcm_oss_read+0x7cf/0x1b80 sound/core/oss/pcm_oss.c:2752
CPU: 1 PID: 4583 Comm: syz-executor210 Not tainted 4.18.0-rc4+ #25
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+0x185/0x1e0 lib/dump_stack.c:113
 kmsan_report+0x195/0x2c0 mm/kmsan/kmsan.c:1092
 kmsan_internal_check_memory+0x18e/0x210 mm/kmsan/kmsan.c:1156
 kmsan_copy_to_user+0x83/0xe0 mm/kmsan/kmsan_hooks.c:479
 copy_to_user include/linux/uaccess.h:184 [inline]
 snd_pcm_oss_read1 sound/core/oss/pcm_oss.c:1522 [inline]
 snd_pcm_oss_read+0x7cf/0x1b80 sound/core/oss/pcm_oss.c:2752
 __vfs_read+0x1f0/0xb40 fs/read_write.c:416
 vfs_read+0x36c/0x6b0 fs/read_write.c:452
 ksys_read fs/read_write.c:578 [inline]
 __do_sys_read fs/read_write.c:588 [inline]
 __se_sys_read fs/read_write.c:586 [inline]
 __x64_sys_read+0x1cf/0x400 fs/read_write.c:586
 do_syscall_64+0x15b/0x230 arch/x86/entry/common.c:290
 entry_SYSCALL_64_after_hwframe+0x63/0xe7
RIP: 0033:0x441239
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 3b 10 fc ff c3 66 2e 0f 1f 84 00 00 00 00 
RSP: 002b:00007ffc83042ab8 EFLAGS: 00000246 ORIG_RAX: 0000000000000000
RAX: ffffffffffffffda RBX: 00000000ffffffff RCX: 0000000000441239
RDX: 0000000000001000 RSI: 0000000020000100 RDI: 0000000000000003
RBP: 6f72746e6f632f2e R08: 00007ffc83042b30 R09: 00007ffc83042b30
R10: 00007ffc83042b30 R11: 0000000000000246 R12: 6d74702f7665642f
R13: 0030656c69662f2e R14: 0000000000000000 R15: 0000000000000000

Uninit was created at:
 kmsan_save_stack_with_flags mm/kmsan/kmsan.c:256 [inline]
 kmsan_internal_alloc_meta_for_pages+0x157/0x730 mm/kmsan/kmsan.c:804
 kmsan_alloc_page+0x80/0xe0 mm/kmsan/kmsan_hooks.c:250
 __alloc_pages_nodemask+0x105b/0x6320 mm/page_alloc.c:4409
 alloc_pages_current+0x6b1/0x970 mm/mempolicy.c:2093
 alloc_pages include/linux/gfp.h:494 [inline]
 __vmalloc_area_node mm/vmalloc.c:1689 [inline]
 __vmalloc_node_range+0x8bf/0x1170 mm/vmalloc.c:1754
 __vmalloc_node mm/vmalloc.c:1799 [inline]
 __vmalloc_node_flags mm/vmalloc.c:1813 [inline]
 vmalloc+0xd8/0xf0 mm/vmalloc.c:1835
 snd_pcm_oss_change_params_locked+0x6597/0x6bf0 sound/core/oss/pcm_oss.c:1066
 snd_pcm_oss_make_ready_locked sound/core/oss/pcm_oss.c:1183 [inline]
 snd_pcm_oss_read1 sound/core/oss/pcm_oss.c:1507 [inline]
 snd_pcm_oss_read+0x4d0/0x1b80 sound/core/oss/pcm_oss.c:2752
 __vfs_read+0x1f0/0xb40 fs/read_write.c:416
 vfs_read+0x36c/0x6b0 fs/read_write.c:452
 ksys_read fs/read_write.c:578 [inline]
 __do_sys_read fs/read_write.c:588 [inline]
 __se_sys_read fs/read_write.c:586 [inline]
 __x64_sys_read+0x1cf/0x400 fs/read_write.c:586
 do_syscall_64+0x15b/0x230 arch/x86/entry/common.c:290
 entry_SYSCALL_64_after_hwframe+0x63/0xe7

Byte 0 of 1 is uninitialized
Memory access starts at ffffc9000189f000
==================================================================

Crashes (922):
Time Kernel Commit Syzkaller Config Log Report Syz repro C repro VM info Assets (help?) Manager Title
2018/07/12 23:11 https://github.com/google/kmsan.git master b64f7ec04e12 06c33b3a .config console log report syz C ci-upstream-kmsan-gce
2018/07/09 12:11 https://github.com/google/kmsan.git master a00de5aa4da3 f25e5770 .config console log report syz C ci-upstream-kmsan-gce
2018/07/09 10:45 https://github.com/google/kmsan.git master a00de5aa4da3 f25e5770 .config console log report syz C ci-upstream-kmsan-gce
2018/07/06 04:32 https://github.com/google/kmsan.git master 86eb85c04833 d3b2a0e2 .config console log report syz C ci-upstream-kmsan-gce
2018/07/03 10:08 https://github.com/google/kmsan.git master 4ca559bbdeaf 317fc8ea .config console log report syz C ci-upstream-kmsan-gce
2018/07/02 23:55 https://github.com/google/kmsan.git master 6c3632ffef26 574780b0 .config console log report syz C ci-upstream-kmsan-gce
2018/07/13 09:10 https://github.com/google/kmsan.git master b64f7ec04e12 06c33b3a .config console log report ci-upstream-kmsan-gce
2018/07/13 08:39 https://github.com/google/kmsan.git master b64f7ec04e12 06c33b3a .config console log report ci-upstream-kmsan-gce
2018/07/13 07:25 https://github.com/google/kmsan.git master b64f7ec04e12 06c33b3a .config console log report ci-upstream-kmsan-gce
2018/07/13 05:32 https://github.com/google/kmsan.git master b64f7ec04e12 06c33b3a .config console log report ci-upstream-kmsan-gce
2018/07/13 04:08 https://github.com/google/kmsan.git master b64f7ec04e12 06c33b3a .config console log report ci-upstream-kmsan-gce
2018/07/13 02:48 https://github.com/google/kmsan.git master b64f7ec04e12 06c33b3a .config console log report ci-upstream-kmsan-gce
2018/07/13 01:27 https://github.com/google/kmsan.git master b64f7ec04e12 06c33b3a .config console log report ci-upstream-kmsan-gce
2018/07/13 01:11 https://github.com/google/kmsan.git master b64f7ec04e12 06c33b3a .config console log report ci-upstream-kmsan-gce
2018/07/12 21:43 https://github.com/google/kmsan.git master b64f7ec04e12 06c33b3a .config console log report ci-upstream-kmsan-gce
2018/07/12 20:29 https://github.com/google/kmsan.git master b64f7ec04e12 06c33b3a .config console log report ci-upstream-kmsan-gce
2018/07/12 19:24 https://github.com/google/kmsan.git master b64f7ec04e12 06c33b3a .config console log report ci-upstream-kmsan-gce
2018/07/12 17:35 https://github.com/google/kmsan.git master b64f7ec04e12 06c33b3a .config console log report ci-upstream-kmsan-gce
2018/07/12 16:09 https://github.com/google/kmsan.git master b64f7ec04e12 06c33b3a .config console log report ci-upstream-kmsan-gce
2018/07/12 14:41 https://github.com/google/kmsan.git master b64f7ec04e12 06c33b3a .config console log report ci-upstream-kmsan-gce
2018/07/12 13:24 https://github.com/google/kmsan.git master b64f7ec04e12 06c33b3a .config console log report ci-upstream-kmsan-gce
2018/07/12 11:45 https://github.com/google/kmsan.git master b64f7ec04e12 06c33b3a .config console log report ci-upstream-kmsan-gce
2018/07/12 08:38 https://github.com/google/kmsan.git master b64f7ec04e12 2e0e3130 .config console log report ci-upstream-kmsan-gce
2018/07/12 07:08 https://github.com/google/kmsan.git master b64f7ec04e12 2e0e3130 .config console log report ci-upstream-kmsan-gce
2018/07/12 05:40 https://github.com/google/kmsan.git master b64f7ec04e12 2e0e3130 .config console log report ci-upstream-kmsan-gce
2018/07/12 05:20 https://github.com/google/kmsan.git master b64f7ec04e12 2e0e3130 .config console log report ci-upstream-kmsan-gce
2018/07/12 04:15 https://github.com/google/kmsan.git master b64f7ec04e12 2e0e3130 .config console log report ci-upstream-kmsan-gce
2018/07/12 03:15 https://github.com/google/kmsan.git master b64f7ec04e12 2e0e3130 .config console log report ci-upstream-kmsan-gce
2018/07/12 01:55 https://github.com/google/kmsan.git master b64f7ec04e12 2e0e3130 .config console log report ci-upstream-kmsan-gce
2018/07/11 23:52 https://github.com/google/kmsan.git master b64f7ec04e12 2e0e3130 .config console log report ci-upstream-kmsan-gce
2018/07/11 21:32 https://github.com/google/kmsan.git master b64f7ec04e12 2e0e3130 .config console log report ci-upstream-kmsan-gce
2018/07/11 18:52 https://github.com/google/kmsan.git master b64f7ec04e12 2e0e3130 .config console log report ci-upstream-kmsan-gce
2018/07/11 17:44 https://github.com/google/kmsan.git master b64f7ec04e12 2e0e3130 .config console log report ci-upstream-kmsan-gce
2018/07/11 16:07 https://github.com/google/kmsan.git master b64f7ec04e12 2e0e3130 .config console log report ci-upstream-kmsan-gce
2018/07/11 15:18 https://github.com/google/kmsan.git master b64f7ec04e12 2e0e3130 .config console log report ci-upstream-kmsan-gce
2018/07/11 13:55 https://github.com/google/kmsan.git master b64f7ec04e12 2e0e3130 .config console log report ci-upstream-kmsan-gce
2018/07/11 12:06 https://github.com/google/kmsan.git master b64f7ec04e12 2e0e3130 .config console log report ci-upstream-kmsan-gce
2018/07/11 10:26 https://github.com/google/kmsan.git master b64f7ec04e12 2e0e3130 .config console log report ci-upstream-kmsan-gce
2018/07/11 08:55 https://github.com/google/kmsan.git master b64f7ec04e12 2e0e3130 .config console log report ci-upstream-kmsan-gce
2018/07/11 05:44 https://github.com/google/kmsan.git master b64f7ec04e12 2e0e3130 .config console log report ci-upstream-kmsan-gce
2018/07/11 04:37 https://github.com/google/kmsan.git master b64f7ec04e12 2e0e3130 .config console log report ci-upstream-kmsan-gce
2018/07/11 03:24 https://github.com/google/kmsan.git master b64f7ec04e12 2e0e3130 .config console log report ci-upstream-kmsan-gce
2018/07/11 02:01 https://github.com/google/kmsan.git master b64f7ec04e12 2e0e3130 .config console log report ci-upstream-kmsan-gce
2018/07/11 00:55 https://github.com/google/kmsan.git master b64f7ec04e12 2e0e3130 .config console log report ci-upstream-kmsan-gce
2018/07/10 22:05 https://github.com/google/kmsan.git master b64f7ec04e12 2e0e3130 .config console log report ci-upstream-kmsan-gce
2018/07/10 19:20 https://github.com/google/kmsan.git master b64f7ec04e12 9fa03fa5 .config console log report ci-upstream-kmsan-gce
2018/07/02 14:24 https://github.com/google/kmsan.git master 6c3632ffef26 dba0b50e .config console log report ci-upstream-kmsan-gce
* Struck through repros no longer work on HEAD.