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KASAN: slab-out-of-bounds Read in mceusb_dev_recv

Status: closed as invalid on 2020/06/18 12:03
Subsystems: usb media
[Documentation on labels]
Reported-by: syzbot+c7fdb6cb36e65f2fe8c9@syzkaller.appspotmail.com
First crash: 1713d, last: 1654d
▶ ▼ Discussions (7)
Title Replies (including bot) Last reply
KASAN: slab-out-of-bounds Read in mceusb_dev_recv 1 (2) 2020/06/18 12:02
[PATCH 5.4 00/66] 5.4.1-stable review 75 (75) 2019/11/29 08:52
[PATCH 5.3 00/95] 5.3.14-stable review 100 (100) 2019/11/28 21:29
Reminder: 67 active syzbot reports in usb subsystem 1 (1) 2019/10/04 03:38
Reminder: 52 active syzbot reports in usb subsystem 4 (4) 2019/09/19 19:01
[PATCH v1] [media] mceusb: fix out of bounds read in MCE receiver buffer 1 (1) 2019/09/06 12:17
Reminder: 52 active syzbot reports in usb subsystem 1 (1) 2019/08/22 03:28

Sample crash report:
mceusb 1-1:0.0: short-range (0x2) receiver active
mceusb 1-1:0.0: long-range (0xe9) receiver active
==================================================================
BUG: KASAN: slab-out-of-bounds in mceusb_handle_command drivers/media/rc/mceusb.c:1146 [inline]
BUG: KASAN: slab-out-of-bounds in mceusb_process_ir_data drivers/media/rc/mceusb.c:1238 [inline]
BUG: KASAN: slab-out-of-bounds in mceusb_dev_recv+0x101e/0x12e0 drivers/media/rc/mceusb.c:1321
Read of size 1 at addr ffff8881d54a3100 by task swapper/0/0

CPU: 0 PID: 0 Comm: swapper/0 Not tainted 5.3.0+ #0
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011
Call Trace:
 <IRQ>
 __dump_stack lib/dump_stack.c:77 [inline]
 dump_stack+0xca/0x13e lib/dump_stack.c:113
 print_address_description+0x6a/0x32c mm/kasan/report.c:351
 __kasan_report.cold+0x1a/0x33 mm/kasan/report.c:482
 kasan_report+0xe/0x12 mm/kasan/common.c:618
 mceusb_handle_command drivers/media/rc/mceusb.c:1146 [inline]
 mceusb_process_ir_data drivers/media/rc/mceusb.c:1238 [inline]
 mceusb_dev_recv+0x101e/0x12e0 drivers/media/rc/mceusb.c:1321
 __usb_hcd_giveback_urb+0x1f2/0x470 drivers/usb/core/hcd.c:1654
 usb_hcd_giveback_urb+0x368/0x420 drivers/usb/core/hcd.c:1719
 dummy_timer+0x120f/0x2fa2 drivers/usb/gadget/udc/dummy_hcd.c:1965
 call_timer_fn+0x179/0x650 kernel/time/timer.c:1404
 expire_timers kernel/time/timer.c:1449 [inline]
 __run_timers kernel/time/timer.c:1771 [inline]
 __run_timers kernel/time/timer.c:1738 [inline]
 run_timer_softirq+0x5e0/0x14d0 kernel/time/timer.c:1784
 __do_softirq+0x221/0x912 kernel/softirq.c:292
 invoke_softirq kernel/softirq.c:373 [inline]
 irq_exit+0x178/0x1a0 kernel/softirq.c:413
 exiting_irq arch/x86/include/asm/apic.h:536 [inline]
 smp_apic_timer_interrupt+0x12f/0x500 arch/x86/kernel/apic/apic.c:1137
 apic_timer_interrupt+0xf/0x20 arch/x86/entry/entry_64.S:830
 </IRQ>
RIP: 0010:default_idle+0x28/0x2e0 arch/x86/kernel/process.c:581
Code: 90 90 41 56 41 55 65 44 8b 2d 94 9d 90 7a 41 54 55 53 0f 1f 44 00 00 e8 36 71 d2 fb e9 07 00 00 00 0f 00 2d ca 43 51 00 fb f4 <65> 44 8b 2d 70 9d 90 7a 0f 1f 44 00 00 5b 5d 41 5c 41 5d 41 5e c3
RSP: 0018:ffffffff86c07da8 EFLAGS: 00000246 ORIG_RAX: ffffffffffffff13
RAX: 0000000000000007 RBX: ffffffff86c2b200 RCX: 0000000000000000
RDX: 0000000000000000 RSI: 0000000000000006 RDI: ffffffff86c2ba4c
RBP: fffffbfff0d85640 R08: ffffffff86c2b200 R09: 0000000000000000
R10: 0000000000000000 R11: 0000000000000000 R12: 0000000000000000
R13: 0000000000000000 R14: 0000000000000000 R15: 0000000000000000
 cpuidle_idle_call kernel/sched/idle.c:154 [inline]
 do_idle+0x3b6/0x500 kernel/sched/idle.c:264
 cpu_startup_entry+0x14/0x20 kernel/sched/idle.c:356
 start_kernel+0x838/0x872 init/main.c:785
 secondary_startup_64+0xa4/0xb0 arch/x86/kernel/head_64.S:241

Allocated by task 102:
 save_stack+0x1b/0x80 mm/kasan/common.c:69
 set_track mm/kasan/common.c:77 [inline]
 __kasan_kmalloc mm/kasan/common.c:493 [inline]
 __kasan_kmalloc.constprop.0+0xbf/0xd0 mm/kasan/common.c:466
 kmalloc include/linux/slab.h:557 [inline]
 hcd_buffer_alloc+0x1ed/0x290 drivers/usb/core/buffer.c:132
 usb_alloc_coherent+0x5d/0x80 drivers/usb/core/usb.c:910
 mceusb_dev_probe+0x714/0x2f51 drivers/media/rc/mceusb.c:1674
 usb_probe_interface+0x305/0x7a0 drivers/usb/core/driver.c:361
 really_probe+0x281/0x6d0 drivers/base/dd.c:548
 driver_probe_device+0x101/0x1b0 drivers/base/dd.c:721
 __device_attach_driver+0x1c2/0x220 drivers/base/dd.c:828
 bus_for_each_drv+0x162/0x1e0 drivers/base/bus.c:430
 __device_attach+0x217/0x360 drivers/base/dd.c:894
 bus_probe_device+0x1e4/0x290 drivers/base/bus.c:490
 device_add+0xae6/0x16f0 drivers/base/core.c:2201
 usb_set_configuration+0xdf6/0x1670 drivers/usb/core/message.c:2023
 generic_probe+0x9d/0xd5 drivers/usb/core/generic.c:210
 usb_probe_device+0x99/0x100 drivers/usb/core/driver.c:266
 really_probe+0x281/0x6d0 drivers/base/dd.c:548
 driver_probe_device+0x101/0x1b0 drivers/base/dd.c:721
 __device_attach_driver+0x1c2/0x220 drivers/base/dd.c:828
 bus_for_each_drv+0x162/0x1e0 drivers/base/bus.c:430
 __device_attach+0x217/0x360 drivers/base/dd.c:894
 bus_probe_device+0x1e4/0x290 drivers/base/bus.c:490
 device_add+0xae6/0x16f0 drivers/base/core.c:2201
 usb_new_device.cold+0x6a4/0xe79 drivers/usb/core/hub.c:2536
 hub_port_connect drivers/usb/core/hub.c:5098 [inline]
 hub_port_connect_change drivers/usb/core/hub.c:5213 [inline]
 port_event drivers/usb/core/hub.c:5359 [inline]
 hub_event+0x1b5c/0x3640 drivers/usb/core/hub.c:5441
 process_one_work+0x92b/0x1530 kernel/workqueue.c:2269
 worker_thread+0x96/0xe20 kernel/workqueue.c:2415
 kthread+0x318/0x420 kernel/kthread.c:255
 ret_from_fork+0x24/0x30 arch/x86/entry/entry_64.S:352

Freed by task 1:
 save_stack+0x1b/0x80 mm/kasan/common.c:69
 set_track mm/kasan/common.c:77 [inline]
 __kasan_slab_free+0x130/0x180 mm/kasan/common.c:455
 slab_free_hook mm/slub.c:1423 [inline]
 slab_free_freelist_hook mm/slub.c:1474 [inline]
 slab_free mm/slub.c:3016 [inline]
 kfree+0xe4/0x2f0 mm/slub.c:3957
 do_new_mount fs/namespace.c:2798 [inline]
 do_mount+0x69f/0x1af0 fs/namespace.c:3114
 ksys_mount+0xd7/0x150 fs/namespace.c:3323
 __do_sys_mount fs/namespace.c:3337 [inline]
 __se_sys_mount fs/namespace.c:3334 [inline]
 __x64_sys_mount+0xba/0x150 fs/namespace.c:3334
 do_syscall_64+0xb7/0x580 arch/x86/entry/common.c:290
 entry_SYSCALL_64_after_hwframe+0x49/0xbe

The buggy address belongs to the object at ffff8881d54a3000
 which belongs to the cache kmalloc-256 of size 256
The buggy address is located 0 bytes to the right of
 256-byte region [ffff8881d54a3000, ffff8881d54a3100)
The buggy address belongs to the page:
page:ffffea00075528c0 refcount:1 mapcount:0 mapping:ffff8881da002780 index:0x0
flags: 0x200000000000200(slab)
raw: 0200000000000200 dead000000000100 dead000000000122 ffff8881da002780
raw: 0000000000000000 00000000000c000c 00000001ffffffff 0000000000000000
page dumped because: kasan: bad access detected

Memory state around the buggy address:
 ffff8881d54a3000: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00
 ffff8881d54a3080: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00
>ffff8881d54a3100: fc fc fc fc fc fc fc fc 00 00 00 00 00 00 00 00
                   ^
 ffff8881d54a3180: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00
 ffff8881d54a3200: 00 00 00 00 00 00 00 00 fc fc fc fc fc fc fc fc
==================================================================

Crashes (245):
Time Kernel Commit Syzkaller Config Log Report Syz repro C repro VM info Assets (help?) Manager Title
2019/09/20 20:06 https://github.com/google/kasan.git usb-fuzzer e0bd8d794fc9 d96e88f3 .config console log report syz C ci2-upstream-usb
2019/09/06 23:17 https://github.com/google/kasan.git usb-fuzzer f0df5c1be1e9 acb5b744 .config console log report syz C ci2-upstream-usb
2019/08/23 20:30 https://github.com/google/kasan.git usb-fuzzer eea39f24f4a5 78ded196 .config console log report syz C ci2-upstream-usb
2019/08/15 01:11 https://github.com/google/kasan.git usb-fuzzer d0847550e22d 0d298d6b .config console log report syz C ci2-upstream-usb
2019/08/10 01:12 https://github.com/google/kasan.git usb-fuzzer e96407b49762 aff9e255 .config console log report syz C ci2-upstream-usb
2019/10/08 07:38 https://github.com/google/kasan.git usb-fuzzer 58d5f26a5584 28ac6e64 .config console log report ci2-upstream-usb
2019/10/08 06:38 https://github.com/google/kasan.git usb-fuzzer 58d5f26a5584 28ac6e64 .config console log report ci2-upstream-usb
2019/10/08 04:59 https://github.com/google/kasan.git usb-fuzzer 58d5f26a5584 28ac6e64 .config console log report ci2-upstream-usb
2019/10/08 03:28 https://github.com/google/kasan.git usb-fuzzer 58d5f26a5584 28ac6e64 .config console log report ci2-upstream-usb
2019/10/08 01:30 https://github.com/google/kasan.git usb-fuzzer 58d5f26a5584 28ac6e64 .config console log report ci2-upstream-usb
2019/10/07 22:47 https://github.com/google/kasan.git usb-fuzzer 58d5f26a5584 28ac6e64 .config console log report ci2-upstream-usb
2019/10/07 17:14 https://github.com/google/kasan.git usb-fuzzer 58d5f26a5584 28ac6e64 .config console log report ci2-upstream-usb
2019/10/07 13:50 https://github.com/google/kasan.git usb-fuzzer 58d5f26a5584 28ac6e64 .config console log report ci2-upstream-usb
2019/10/07 11:28 https://github.com/google/kasan.git usb-fuzzer 58d5f26a5584 28ac6e64 .config console log report ci2-upstream-usb
2019/10/07 04:18 https://github.com/google/kasan.git usb-fuzzer 58d5f26a5584 f3f7d9c8 .config console log report ci2-upstream-usb
2019/10/06 17:17 https://github.com/google/kasan.git usb-fuzzer 58d5f26a5584 f3f7d9c8 .config console log report ci2-upstream-usb
2019/10/06 13:26 https://github.com/google/kasan.git usb-fuzzer 58d5f26a5584 f3f7d9c8 .config console log report ci2-upstream-usb
2019/10/06 07:19 https://github.com/google/kasan.git usb-fuzzer 58d5f26a5584 f3f7d9c8 .config console log report ci2-upstream-usb
2019/10/06 02:07 https://github.com/google/kasan.git usb-fuzzer 58d5f26a5584 f3f7d9c8 .config console log report ci2-upstream-usb
2019/10/05 21:27 https://github.com/google/kasan.git usb-fuzzer 58d5f26a5584 f3f7d9c8 .config console log report ci2-upstream-usb
2019/10/05 19:02 https://github.com/google/kasan.git usb-fuzzer 58d5f26a5584 f3f7d9c8 .config console log report ci2-upstream-usb
2019/10/05 17:11 https://github.com/google/kasan.git usb-fuzzer 58d5f26a5584 f3f7d9c8 .config console log report ci2-upstream-usb
2019/10/05 15:54 https://github.com/google/kasan.git usb-fuzzer 58d5f26a5584 f3f7d9c8 .config console log report ci2-upstream-usb
2019/10/05 15:29 https://github.com/google/kasan.git usb-fuzzer 58d5f26a5584 f3f7d9c8 .config console log report ci2-upstream-usb
2019/10/05 12:33 https://github.com/google/kasan.git usb-fuzzer 58d5f26a5584 f3f7d9c8 .config console log report ci2-upstream-usb
2019/10/05 10:11 https://github.com/google/kasan.git usb-fuzzer 58d5f26a5584 f3f7d9c8 .config console log report ci2-upstream-usb
2019/10/05 07:38 https://github.com/google/kasan.git usb-fuzzer 58d5f26a5584 f3f7d9c8 .config console log report ci2-upstream-usb
2019/10/04 11:14 https://github.com/google/kasan.git usb-fuzzer 58d5f26a5584 fc17ba49 .config console log report ci2-upstream-usb
2019/10/04 07:16 https://github.com/google/kasan.git usb-fuzzer 58d5f26a5584 fc17ba49 .config console log report ci2-upstream-usb
2019/10/03 20:22 https://github.com/google/kasan.git usb-fuzzer 58d5f26a5584 fc17ba49 .config console log report ci2-upstream-usb
2019/10/03 17:45 https://github.com/google/kasan.git usb-fuzzer 58d5f26a5584 fc17ba49 .config console log report ci2-upstream-usb
2019/10/03 14:13 https://github.com/google/kasan.git usb-fuzzer 58d5f26a5584 fc17ba49 .config console log report ci2-upstream-usb
2019/10/03 12:58 https://github.com/google/kasan.git usb-fuzzer 58d5f26a5584 fc17ba49 .config console log report ci2-upstream-usb
2019/10/03 11:39 https://github.com/google/kasan.git usb-fuzzer 58d5f26a5584 fc17ba49 .config console log report ci2-upstream-usb
2019/10/03 05:36 https://github.com/google/kasan.git usb-fuzzer 58d5f26a5584 2e29b534 .config console log report ci2-upstream-usb
2019/10/03 02:44 https://github.com/google/kasan.git usb-fuzzer 58d5f26a5584 2e29b534 .config console log report ci2-upstream-usb
2019/10/02 16:43 https://github.com/google/kasan.git usb-fuzzer 58d5f26a5584 2e29b534 .config console log report ci2-upstream-usb
2019/10/02 14:53 https://github.com/google/kasan.git usb-fuzzer 58d5f26a5584 2e29b534 .config console log report ci2-upstream-usb
2019/10/02 01:03 https://github.com/google/kasan.git usb-fuzzer 2994c07743fe b7a87a83 .config console log report ci2-upstream-usb
2019/10/01 21:26 https://github.com/google/kasan.git usb-fuzzer 2994c07743fe b7a87a83 .config console log report ci2-upstream-usb
2019/10/01 18:50 https://github.com/google/kasan.git usb-fuzzer 2994c07743fe b7a87a83 .config console log report ci2-upstream-usb
2019/10/01 17:49 https://github.com/google/kasan.git usb-fuzzer 2994c07743fe b7a87a83 .config console log report ci2-upstream-usb
2019/10/01 14:18 https://github.com/google/kasan.git usb-fuzzer 2994c07743fe b7a87a83 .config console log report ci2-upstream-usb
2019/10/01 07:35 https://github.com/google/kasan.git usb-fuzzer 2994c07743fe c7a4fb99 .config console log report ci2-upstream-usb
2019/09/30 16:50 https://github.com/google/kasan.git usb-fuzzer 2994c07743fe c7a4fb99 .config console log report ci2-upstream-usb
2019/09/29 13:19 https://github.com/google/kasan.git usb-fuzzer 2994c07743fe c1ad5441 .config console log report ci2-upstream-usb
2019/09/29 04:42 https://github.com/google/kasan.git usb-fuzzer 2994c07743fe eb6b9855 .config console log report ci2-upstream-usb
2019/09/28 23:44 https://github.com/google/kasan.git usb-fuzzer 2994c07743fe eb6b9855 .config console log report ci2-upstream-usb
* Struck through repros no longer work on HEAD.