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cpuidle: using governor menu ACPI: bus type PCI registered PCI: Using configuration type 1 for base access kworker/u4:2 (232) used greatest stack depth: 21992 bytes left ================================================================== BUG: KASAN: use-after-free in call_usermodehelper_exec_work+0x2d3/0x310 kernel/umh.c:195 Write of size 4 at addr ffff8801d8bdd770 by task kworker/u4:0/7 CPU: 1 PID: 7 Comm: kworker/u4:0 Not tainted 4.17.0+ #94 Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011 Workqueue: events_unbound call_usermodehelper_exec_work 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_store4_noabort+0x17/0x20 mm/kasan/report.c:437 call_usermodehelper_exec_work+0x2d3/0x310 kernel/umh.c:195 process_one_work+0xc64/0x1b70 kernel/workqueue.c:2153 worker_thread+0x181/0x13a0 kernel/workqueue.c:2296 kthread+0x345/0x410 kernel/kthread.c:240 ret_from_fork+0x3a/0x50 arch/x86/entry/entry_64.S:412 Allocated by task 1: 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 kmem_cache_alloc_trace+0x152/0x780 mm/slab.c:3620 kmalloc include/linux/slab.h:513 [inline] kzalloc include/linux/slab.h:706 [inline] call_usermodehelper_setup+0xe8/0x400 kernel/umh.c:382 kobject_uevent_env+0xb21/0x1110 lib/kobject_uevent.c:608 kobject_uevent+0x1f/0x30 lib/kobject_uevent.c:636 kernel_add_sysfs_param kernel/params.c:798 [inline] param_sysfs_builtin kernel/params.c:833 [inline] param_sysfs_init+0x3f9/0x486 kernel/params.c:954 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 Freed by task 514: 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 call_usermodehelper_freeinfo kernel/umh.c:45 [inline] umh_complete+0x7b/0x90 kernel/umh.c:59 call_usermodehelper_exec_async+0x6e8/0x9e0 kernel/umh.c:116 ret_from_fork+0x3a/0x50 arch/x86/entry/entry_64.S:412 The buggy address belongs to the object at ffff8801d8bdd700 which belongs to the cache kmalloc-192 of size 192 The buggy address is located 112 bytes inside of 192-byte region [ffff8801d8bdd700, ffff8801d8bdd7c0) The buggy address belongs to the page: page:ffffea000762f740 count:1 mapcount:0 mapping:ffff8801da800040 index:0x0 flags: 0x2fffc0000000100(slab) raw: 02fffc0000000100 ffffea0007627108 ffffea000762fbc8 ffff8801da800040 raw: 0000000000000000 ffff8801d8bdd000 0000000100000010 0000000000000000 page dumped because: kasan: bad access detected Memory state around the buggy address: ffff8801d8bdd600: fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc ffff8801d8bdd680: fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc >ffff8801d8bdd700: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb ^ ffff8801d8bdd780: fb fb fb fb fb fb fb fb fc fc fc fc fc fc fc fc ffff8801d8bdd800: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb ==================================================================
Time | Kernel | Commit | Syzkaller | Config | Log | Report | Syz repro | C repro | VM info | Assets (help?) | Manager | Title |
---|---|---|---|---|---|---|---|---|---|---|---|---|
2018/06/10 12:06 | upstream | 3ca24ce9ff76 | 866118af | .config | console log | report | ci-upstream-kasan-gce | |||||
2018/06/09 09:27 | upstream | 7d3bf613e99a | 866118af | .config | console log | report | ci-upstream-kasan-gce-root | |||||
2018/06/08 20:06 | upstream | 410feb75de24 | 866118af | .config | console log | report | ci-upstream-kasan-gce-root | |||||
2018/06/08 19:48 | upstream | 410feb75de24 | 866118af | .config | console log | report | ci-upstream-kasan-gce | |||||
2018/06/09 22:22 | upstream | a16afaf7928b | 866118af | .config | console log | report | ci-upstream-kasan-gce-386 |