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WARNING: kmalloc bug in input_mt_init_slots

Status: fixed on 2018/11/12 21:25
Subsystems: input
[Documentation on labels]
Reported-by: syzbot+87829a10073277282ad1@syzkaller.appspotmail.com
Fix commit: 61448479a9f2 mm: don't warn about large allocations for slab
First crash: 2321d, last: 2287d
▶ ▼ Discussions (18)
Title Replies (including bot) Last reply
[PATCH 4.19 000/110] 4.19.6-stable review 142 (142) 2018/12/14 17:42
[PATCH 4.14 000/100] 4.14.85-stable review 116 (116) 2018/12/03 11:38
[PATCH 4.9 00/92] 4.9.142-stable review 102 (102) 2018/11/30 22:28
[PATCH AUTOSEL 3.18 1/9] bfs: add sanity check at bfs_fill_super() 24 (24) 2018/11/22 21:01
[PATCH AUTOSEL 4.18 01/39] bfs: add sanity check at bfs_fill_super() 41 (41) 2018/11/22 19:35
[PATCH AUTOSEL 4.9 01/17] bfs: add sanity check at bfs_fill_super() 20 (20) 2018/11/22 15:53
[PATCH AUTOSEL 4.4 01/11] bfs: add sanity check at bfs_fill_super() 11 (11) 2018/11/13 05:52
[PATCH AUTOSEL 4.14 01/26] bfs: add sanity check at bfs_fill_super() 26 (26) 2018/11/13 05:51
[PATCH AUTOSEL 4.19 01/44] bfs: add sanity check at bfs_fill_super() 44 (44) 2018/11/13 05:49
[PATCH AUTOSEL 4.14 01/30] mm/vmstat.c: assert that vmstat_text is in sync with stat_items_size 33 (33) 2018/11/11 22:07
[PATCH AUTOSEL 4.19 01/57] mm: thp: fix MADV_DONTNEED vs migrate_misplaced_transhuge_page race condition 58 (58) 2018/11/05 22:26
[PATCH AUTOSEL 3.18 01/13] mm/vmstat.c: assert that vmstat_text is in sync with stat_items_size 13 (13) 2018/11/04 13:54
[PATCH AUTOSEL 4.4 01/15] mm/vmstat.c: assert that vmstat_text is in sync with stat_items_size 15 (15) 2018/11/04 13:54
[PATCH AUTOSEL 4.9 01/21] mm/vmstat.c: assert that vmstat_text is in sync with stat_items_size 21 (21) 2018/11/04 13:53
[PATCH AUTOSEL 4.18 01/45] mm: thp: fix MADV_DONTNEED vs migrate_misplaced_transhuge_page race condition 45 (45) 2018/11/04 13:52
WARNING: kmalloc bug in input_mt_init_slots 19 (20) 2018/10/17 15:53
[PATCH v2] mm: don't warn about large allocations for slab 2 (2) 2018/10/16 13:59
[PATCH] mm: don't warn about large allocations for slab 3 (3) 2018/09/27 17:17

Sample crash report:
WARNING: CPU: 0 PID: 2880 at mm/slab_common.c:1031 kmalloc_slab+0x56/0x70 mm/slab_common.c:1031
Kernel panic - not syncing: panic_on_warn set ...

CPU: 0 PID: 2880 Comm: syz-executor472 Not tainted 4.19.0-rc4+ #249
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+0x1c4/0x2b4 lib/dump_stack.c:113
 panic+0x238/0x4e7 kernel/panic.c:184
 __warn.cold.8+0x163/0x1ba kernel/panic.c:536
 report_bug+0x254/0x2d0 lib/bug.c:186
 fixup_bug arch/x86/kernel/traps.c:178 [inline]
 do_error_trap+0x1fc/0x4d0 arch/x86/kernel/traps.c:296
 do_invalid_op+0x1b/0x20 arch/x86/kernel/traps.c:316
 invalid_op+0x14/0x20 arch/x86/entry/entry_64.S:993
RIP: 0010:kmalloc_slab+0x56/0x70 mm/slab_common.c:1031
kobject: 'input19939' (00000000d34ab3dc): kobject_cleanup, parent           (null)
Code: c5 60 2b 17 89 5d c3 48 85 ff b8 10 00 00 00 74 f4 83 ef 01 c1 ef 03 0f b6 87 80 2a 17 89 eb d8 31 c0 81 e6 00 02 00 00 75 db <0f> 0b 5d c3 48 8b 04 c5 a0 2a 17 89 5d c3 66 90 66 2e 0f 1f 84 00
kobject: 'input19939' (00000000d34ab3dc): calling ktype release
RSP: 0018:ffff8801cb35f978 EFLAGS: 00010246
RAX: 0000000000000000 RBX: 00000000fffffffd RCX: ffffffff8534cee7
RDX: 0000000000000000 RSI: 0000000000000000 RDI: 0000003fffffff60
RBP: ffff8801cb35f978 R08: ffff8801d37486c0 R09: ffffed003a6446d9
R10: ffff8801cb35fa48 R11: ffff8801d32236cf R12: 0000000000000000
R13: 0000000000000000 R14: ffff8801d3130940 R15: 00000000006080c0
 __do_kmalloc mm/slab.c:3713 [inline]
 __kmalloc+0x25/0x760 mm/slab.c:3727
kobject: 'input19939': free name
 kmalloc include/linux/slab.h:518 [inline]
 kzalloc include/linux/slab.h:707 [inline]
 input_mt_init_slots+0xe5/0x4a0 drivers/input/input-mt.c:52
 uinput_create_device drivers/input/misc/uinput.c:335 [inline]
 uinput_ioctl_handler.isra.10+0x2049/0x2540 drivers/input/misc/uinput.c:876
 uinput_ioctl+0x4c/0x60 drivers/input/misc/uinput.c:1047
 vfs_ioctl fs/ioctl.c:46 [inline]
 file_ioctl fs/ioctl.c:501 [inline]
 do_vfs_ioctl+0x1de/0x1720 fs/ioctl.c:685
 ksys_ioctl+0xa9/0xd0 fs/ioctl.c:702
 __do_sys_ioctl fs/ioctl.c:709 [inline]
 __se_sys_ioctl fs/ioctl.c:707 [inline]
 __x64_sys_ioctl+0x73/0xb0 fs/ioctl.c:707
 do_syscall_64+0x1b9/0x820 arch/x86/entry/common.c:290
 entry_SYSCALL_64_after_hwframe+0x49/0xbe
RIP: 0033:0x449f29
Code: e8 1c b4 02 00 48 83 c4 18 c3 0f 1f 80 00 00 00 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 2b 09 fc ff c3 66 2e 0f 1f 84 00 00 00 00
RSP: 002b:00007f40e8ad7ce8 EFLAGS: 00000206 ORIG_RAX: 0000000000000010
RAX: ffffffffffffffda RBX: 00000000006dec28 RCX: 0000000000449f29
RDX: 0000000000449f29 RSI: 0000000000005501 RDI: 0000000000000004
RBP: 00000000006dec20 R08: 0000000000000000 R09: 0000000000000000
R10: 0000000000000000 R11: 0000000000000206 R12: 00000000006dec2c
R13: 00007fff7392efcf R14: 00007f40e8ad89c0 R15: 00000000006ded2c
Kernel Offset: disabled
Rebooting in 86400 seconds..

Crashes (54):
Time Kernel Commit Syzkaller Config Log Report Syz repro C repro VM info Assets (help?) Manager Title
2018/09/22 00:13 upstream 10dc890d4228 37079712 .config console log report syz C ci-upstream-kasan-gce
2018/09/21 23:58 upstream 10dc890d4228 37079712 .config console log report syz C ci-upstream-kasan-gce-selinux-root
2018/09/21 20:00 upstream 234b69e3e089 37079712 .config console log report syz C ci-upstream-kasan-gce-root
2018/09/21 15:48 upstream 234b69e3e089 37079712 .config console log report syz C ci-upstream-kasan-gce-smack-root
2018/09/21 14:03 upstream 234b69e3e089 37079712 .config console log report syz C ci-upstream-kasan-gce-386
2018/09/21 13:39 linux-next 46c163a036b4 37079712 .config console log report syz C ci-upstream-linux-next-kasan-gce-root
2018/10/25 11:04 upstream 01aa9d518eae a8292de9 .config console log report ci-upstream-kasan-gce-root
2018/10/21 16:59 upstream 23469de647c4 ecb386fe .config console log report ci-upstream-kasan-gce-root
2018/10/19 23:19 upstream c7b70a641df2 ecb386fe .config console log report ci-upstream-kasan-gce-selinux-root
2018/10/14 12:01 upstream 3a27203102eb caf12900 .config console log report ci-upstream-kasan-gce
2018/10/12 17:04 upstream 90ad18418c2d caf12900 .config console log report ci-upstream-kasan-gce-root
2018/10/12 02:59 upstream 9dcd936c5312 ba6ddb43 .config console log report ci-upstream-kasan-gce-smack-root
2018/10/11 12:32 upstream 9dcd936c5312 5f818b4b .config console log report ci-upstream-kasan-gce-root
2018/10/11 09:40 upstream b8db9e69dba9 5f818b4b .config console log report ci-upstream-kasan-gce
2018/10/09 20:52 upstream 64c5e530ac2c 8b311eaf .config console log report ci-upstream-kasan-gce-smack-root
2018/10/09 20:51 upstream 64c5e530ac2c 8b311eaf .config console log report ci-upstream-kasan-gce
2018/10/09 20:51 upstream 64c5e530ac2c 8b311eaf .config console log report ci-upstream-kasan-gce-root
2018/10/09 14:37 upstream 64c5e530ac2c 8b311eaf .config console log report ci-upstream-kasan-gce
2018/10/08 11:03 upstream 0238df646e62 8b311eaf .config console log report ci-upstream-kasan-gce-selinux-root
2018/10/07 19:01 upstream fb1c592cf4c9 8b311eaf .config console log report ci-upstream-kasan-gce
2018/10/06 23:45 upstream c1d84a1b42ef 8b311eaf .config console log report ci-upstream-kasan-gce
2018/10/06 23:44 upstream c1d84a1b42ef 8b311eaf .config console log report ci-upstream-kasan-gce-root
2018/10/06 10:25 upstream 091a1eaa0e30 8b311eaf .config console log report ci-upstream-kasan-gce-smack-root
2018/10/06 10:00 upstream 091a1eaa0e30 8b311eaf .config console log report ci-upstream-kasan-gce
2018/10/06 09:14 upstream 091a1eaa0e30 8b311eaf .config console log report ci-upstream-kasan-gce-selinux-root
2018/10/05 22:04 upstream b2e45b46d85b 8b311eaf .config console log report ci-upstream-kasan-gce-root
2018/10/05 22:04 upstream b2e45b46d85b 8b311eaf .config console log report ci-upstream-kasan-gce-smack-root
2018/10/05 22:04 upstream b2e45b46d85b 8b311eaf .config console log report ci-upstream-kasan-gce
2018/10/05 22:04 upstream b2e45b46d85b 8b311eaf .config console log report ci-upstream-kasan-gce-selinux-root
2018/10/05 22:03 upstream b2e45b46d85b 8b311eaf .config console log report ci-upstream-kasan-gce-root
2018/10/05 22:03 upstream b2e45b46d85b 8b311eaf .config console log report ci-upstream-kasan-gce-selinux-root
2018/10/05 22:03 upstream b2e45b46d85b 8b311eaf .config console log report ci-upstream-kasan-gce-smack-root
2018/10/05 22:03 upstream b2e45b46d85b 8b311eaf .config console log report ci-upstream-kasan-gce
2018/10/05 17:47 upstream befad944e231 8b311eaf .config console log report ci-upstream-kasan-gce-smack-root
2018/10/04 11:47 upstream cec4de302c5f 8b311eaf .config console log report ci-upstream-kasan-gce-smack-root
2018/10/02 17:14 upstream 1d2ba7fee28b a316a2af .config console log report ci-upstream-kasan-gce-smack-root
2018/10/01 04:29 upstream 17b57b1883c1 41e4b329 .config console log report ci-upstream-kasan-gce-selinux-root
2018/09/29 21:45 upstream 82ec752cce8b 41e4b329 .config console log report ci-upstream-kasan-gce
2018/09/29 12:30 upstream e704966c45e4 41e4b329 .config console log report ci-upstream-kasan-gce-smack-root
2018/10/09 20:51 upstream 64c5e530ac2c 8b311eaf .config console log report ci-upstream-kasan-gce-386
2018/10/08 02:50 upstream 0238df646e62 8b311eaf .config console log report ci-upstream-kasan-gce-386
2018/10/06 10:48 upstream 091a1eaa0e30 8b311eaf .config console log report ci-upstream-kasan-gce-386
2018/10/05 22:04 upstream b2e45b46d85b 8b311eaf .config console log report ci-upstream-kasan-gce-386
2018/10/05 22:03 upstream b2e45b46d85b 8b311eaf .config console log report ci-upstream-kasan-gce-386
2018/10/02 17:11 linux-next 62f3d25900c9 a316a2af .config console log report ci-upstream-linux-next-kasan-gce-root
2018/09/21 12:15 linux-next 46c163a036b4 37079712 .config console log report ci-upstream-linux-next-kasan-gce-root
* Struck through repros no longer work on HEAD.