KMSAN: uninit-value in ld_usb_read

Status: closed as dup on 2019/09/17 12:21
Subsystems: usb fs
[Documentation on labels]
Reported-by: syzbot+2a4f0b034e05c34252d0@syzkaller.appspotmail.com
First crash: 2520d, last: 2484d
▶ ▼ Duplicate of
Title Rank 🛈 Repro Cause bisect Fix bisect Count Last Reported
general protection fault in __pm_runtime_resume input usb pm 2 syz, C 197 2504d 2567d
▶ ▼ Discussions (1)
Title Replies (including bot) Last reply
KMSAN: uninit-value in ld_usb_read 1 (2) 2019/09/17 12:21
▶ ▼ Similar bugs (1)
Kernel Title Rank 🛈 Repro Cause bisect Fix bisect Count Last Reported Patched Status
upstream KMSAN: uninit-value in ld_usb_read (2) usb 7 syz, C 8 2473d 2481d 0/29 closed as dup on 2019/10/18 14:57

Sample crash report:
=====================================================
BUG: KMSAN: uninit-value in __vfs_read+0x1a9/0xc90 fs/read_write.c:425
CPU: 1 PID: 11312 Comm: syz-executor380 Not tainted 5.3.0-rc7+ #0
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+0x191/0x1f0 lib/dump_stack.c:113
 kmsan_report+0x13a/0x2b0 mm/kmsan/kmsan_report.c:108
 __msan_warning+0x73/0xe0 mm/kmsan/kmsan_instr.c:250
 ld_usb_read+0x872/0xc40 drivers/usb/misc/ldusb.c:490
 __vfs_read+0x1a9/0xc90 fs/read_write.c:425
 vfs_read+0x359/0x6f0 fs/read_write.c:461
 ksys_read+0x265/0x430 fs/read_write.c:587
 __do_sys_read fs/read_write.c:597 [inline]
 __se_sys_read+0x92/0xb0 fs/read_write.c:595
 __x64_sys_read+0x4a/0x70 fs/read_write.c:595
 do_syscall_64+0xbc/0xf0 arch/x86/entry/common.c:297
 entry_SYSCALL_64_after_hwframe+0x63/0xe7
RIP: 0033:0x441879
Code: e8 8c e8 ff ff 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 cb 08 fc ff c3 66 2e 0f 1f 84 00 00 00 00
RSP: 002b:00007ffffcf29ab8 EFLAGS: 00000246 ORIG_RAX: 0000000000000000
RAX: ffffffffffffffda RBX: 0000000000000000 RCX: 0000000000441879
RDX: 00000000ffffffc7 RSI: 0000000020002440 RDI: 0000000000000004
RBP: 00000000006cc018 R08: 000000000000000f R09: 00000000004002c8
R10: 0000000000000000 R11: 0000000000000246 R12: 00000000004025d0
R13: 0000000000402660 R14: 0000000000000000 R15: 0000000000000000
 kmsan_save_stack_with_flags+0x3a/0x80 mm/kmsan/kmsan.c:150
 kmsan_internal_alloc_meta_for_pages mm/kmsan/kmsan_shadow.c:364 [inline]
 kmsan_alloc_page+0x151/0x360 mm/kmsan/kmsan_shadow.c:400
 __alloc_pages_nodemask+0x142d/0x5fa0 mm/page_alloc.c:4757
 alloc_pages_current+0x68d/0x9a0 mm/mempolicy.c:2153
 alloc_pages include/linux/gfp.h:511 [inline]
 kmalloc_order mm/slab_common.c:1257 [inline]
 kmalloc_order_trace+0x87/0x320 mm/slab_common.c:1269
 kmalloc_large include/linux/slab.h:485 [inline]
 __kmalloc+0x2e6/0x430 mm/slub.c:3823
 kmalloc_array+0x86/0x110 include/linux/slab.h:676
 ld_usb_probe+0x650/0x1650 drivers/usb/misc/ldusb.c:700
 usb_probe_interface+0xd19/0x1310 drivers/usb/core/driver.c:361
 really_probe+0x1373/0x1dc0 drivers/base/dd.c:552
 driver_probe_device+0x1ba/0x510 drivers/base/dd.c:709
 __device_attach_driver+0x5b8/0x790 drivers/base/dd.c:816
 bus_for_each_drv+0x28e/0x3b0 drivers/base/bus.c:454
 __device_attach+0x489/0x750 drivers/base/dd.c:882
 device_initial_probe+0x4a/0x60 drivers/base/dd.c:929
 bus_probe_device+0x131/0x390 drivers/base/bus.c:514
 device_add+0x25b5/0x2df0 drivers/base/core.c:2165
 usb_set_configuration+0x309f/0x3710 drivers/usb/core/message.c:2027
 generic_probe+0xe7/0x280 drivers/usb/core/generic.c:210
 usb_probe_device+0x146/0x200 drivers/usb/core/driver.c:266
 really_probe+0x1373/0x1dc0 drivers/base/dd.c:552
 driver_probe_device+0x1ba/0x510 drivers/base/dd.c:709
 __device_attach_driver+0x5b8/0x790 drivers/base/dd.c:816
 bus_for_each_drv+0x28e/0x3b0 drivers/base/bus.c:454
 __device_attach+0x489/0x750 drivers/base/dd.c:882
 device_initial_probe+0x4a/0x60 drivers/base/dd.c:929
 bus_probe_device+0x131/0x390 drivers/base/bus.c:514
 device_add+0x25b5/0x2df0 drivers/base/core.c:2165
 usb_new_device+0x23e5/0x2fb0 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+0x581d/0x72f0 drivers/usb/core/hub.c:5441
 process_one_work+0x1572/0x1ef0 kernel/workqueue.c:2269
 worker_thread+0x111b/0x2460 kernel/workqueue.c:2415
 kthread+0x4b5/0x4f0 kernel/kthread.c:256
 ret_from_fork+0x35/0x40 arch/x86/entry/entry_64.S:355
=====================================================

Crashes (22):
Time Kernel Commit Syzkaller Config Log Report Syz repro C repro VM info Assets (help?) Manager Title
2019/10/02 19:32 https://github.com/google/kmsan.git master 1e76a3e537c3 2e29b534 .config console log report syz C ci-upstream-kmsan-gce
2019/10/01 10:44 https://github.com/google/kmsan.git master f5f9d3ce4686 c7a4fb99 .config console log report syz C ci-upstream-kmsan-gce
2019/09/11 14:14 https://github.com/google/kmsan.git master 014077b5cd62 a60cb4cd .config console log report syz C ci-upstream-kmsan-gce
2019/09/09 15:22 https://github.com/google/kmsan.git master 014077b5cd62 a60cb4cd .config console log report syz C ci-upstream-kmsan-gce
2019/10/15 14:43 https://github.com/google/kmsan.git master c24534505750 b5268b89 .config console log report ci-upstream-kmsan-gce
2019/10/14 22:24 https://github.com/google/kmsan.git master c24534505750 05ad7292 .config console log report ci-upstream-kmsan-gce
2019/10/11 17:32 https://github.com/google/kmsan.git master dde8031634c3 1a3bad90 .config console log report ci-upstream-kmsan-gce
2019/10/10 19:00 https://github.com/google/kmsan.git master c38191cb7026 a4efa8c0 .config console log report ci-upstream-kmsan-gce
2019/10/09 05:20 https://github.com/google/kmsan.git master cebb918b7474 b1ebbfef .config console log report ci-upstream-kmsan-gce
2019/10/09 02:40 https://github.com/google/kmsan.git master cebb918b7474 b1ebbfef .config console log report ci-upstream-kmsan-gce
2019/10/05 02:20 https://github.com/google/kmsan.git master 1e76a3e537c3 f3f7d9c8 .config console log report ci-upstream-kmsan-gce
2019/10/04 14:52 https://github.com/google/kmsan.git master 1e76a3e537c3 b2f369e5 .config console log report ci-upstream-kmsan-gce
2019/10/02 02:46 https://github.com/google/kmsan.git master f5f9d3ce4686 b7a87a83 .config console log report ci-upstream-kmsan-gce
2019/10/01 13:10 https://github.com/google/kmsan.git master f5f9d3ce4686 c7a4fb99 .config console log report ci-upstream-kmsan-gce
2019/09/30 22:24 https://github.com/google/kmsan.git master f5f9d3ce4686 c7a4fb99 .config console log report ci-upstream-kmsan-gce
2019/09/30 13:23 https://github.com/google/kmsan.git master f5f9d3ce4686 c7a4fb99 .config console log report ci-upstream-kmsan-gce
2019/09/30 06:15 https://github.com/google/kmsan.git master 124037e07586 c1ad5441 .config console log report ci-upstream-kmsan-gce
2019/09/29 18:48 https://github.com/google/kmsan.git master 124037e07586 c1ad5441 .config console log report ci-upstream-kmsan-gce
2019/09/29 09:59 https://github.com/google/kmsan.git master 124037e07586 c1ad5441 .config console log report ci-upstream-kmsan-gce
2019/09/29 08:25 https://github.com/google/kmsan.git master 124037e07586 eb6b9855 .config console log report ci-upstream-kmsan-gce
2019/09/29 08:24 https://github.com/google/kmsan.git master 124037e07586 eb6b9855 .config console log report ci-upstream-kmsan-gce
2019/09/28 10:57 https://github.com/google/kmsan.git master 124037e07586 d8074e0b .config console log report ci-upstream-kmsan-gce
* Struck through repros no longer work on HEAD.