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KASAN: slab-out-of-bounds Read in perf_exclude_event | 0 (1) | 2018/12/29 06:34 |
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KASAN: slab-out-of-bounds Read in perf_exclude_event | 0 (1) | 2018/12/29 06:34 |
================================================================== BUG: KASAN: slab-out-of-bounds in perf_exclude_event+0x18b/0x1a0 kernel/events/core.c:7895 Read of size 8 at addr ffff8881b09cff90 by task syz-executor2/30277 CPU: 0 PID: 30277 Comm: syz-executor2 Not tainted 4.20.0-rc7+ #154 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+0x244/0x39d lib/dump_stack.c:113 print_address_description.cold.7+0x9/0x1ff mm/kasan/report.c:256 kasan_report_error mm/kasan/report.c:354 [inline] kasan_report.cold.8+0x242/0x309 mm/kasan/report.c:412 __asan_report_load8_noabort+0x14/0x20 mm/kasan/report.c:433 perf_exclude_event+0x18b/0x1a0 kernel/events/core.c:7895 perf_swevent_hrtimer+0x28f/0x510 kernel/events/core.c:9153 __run_hrtimer kernel/time/hrtimer.c:1398 [inline] __hrtimer_run_queues+0x41c/0x10d0 kernel/time/hrtimer.c:1460 hrtimer_interrupt+0x313/0x780 kernel/time/hrtimer.c:1518 local_apic_timer_interrupt arch/x86/kernel/apic/apic.c:1034 [inline] smp_apic_timer_interrupt+0x1a1/0x760 arch/x86/kernel/apic/apic.c:1059 apic_timer_interrupt+0xf/0x20 arch/x86/entry/entry_64.S:807 </IRQ> Allocated by task 30091: save_stack+0x43/0xd0 mm/kasan/kasan.c:448 set_track mm/kasan/kasan.c:460 [inline] kasan_kmalloc+0xc7/0xe0 mm/kasan/kasan.c:553 kmem_cache_alloc_trace+0x152/0x750 mm/slab.c:3620 kmalloc include/linux/slab.h:546 [inline] kzalloc include/linux/slab.h:741 [inline] kernfs_iop_get_link+0x6d/0x690 fs/kernfs/symlink.c:136 get_link fs/namei.c:1084 [inline] trailing_symlink+0x779/0x970 fs/namei.c:2263 path_openat+0xb58/0x5150 fs/namei.c:3536 do_filp_open+0x255/0x380 fs/namei.c:3564 do_sys_open+0x568/0x700 fs/open.c:1063 __do_sys_open fs/open.c:1081 [inline] __se_sys_open fs/open.c:1076 [inline] __x64_sys_open+0x7e/0xc0 fs/open.c:1076 do_syscall_64+0x1b9/0x820 arch/x86/entry/common.c:290 entry_SYSCALL_64_after_hwframe+0x49/0xbe Freed by task 30091: save_stack+0x43/0xd0 mm/kasan/kasan.c:448 set_track mm/kasan/kasan.c:460 [inline] __kasan_slab_free+0x102/0x150 mm/kasan/kasan.c:521 kasan_slab_free+0xe/0x10 mm/kasan/kasan.c:528 __cache_free mm/slab.c:3498 [inline] kfree+0xcf/0x230 mm/slab.c:3817 kfree_link+0x15/0x20 fs/libfs.c:1105 do_delayed_call include/linux/delayed_call.h:28 [inline] put_link fs/namei.c:883 [inline] step_into fs/namei.c:1772 [inline] do_last fs/namei.c:3383 [inline] path_openat+0x1ed3/0x5150 fs/namei.c:3534 do_filp_open+0x255/0x380 fs/namei.c:3564 do_sys_open+0x568/0x700 fs/open.c:1063 __do_sys_open fs/open.c:1081 [inline] __se_sys_open fs/open.c:1076 [inline] __x64_sys_open+0x7e/0xc0 fs/open.c:1076 do_syscall_64+0x1b9/0x820 arch/x86/entry/common.c:290 entry_SYSCALL_64_after_hwframe+0x49/0xbe The buggy address belongs to the object at ffff8881b09ce080 which belongs to the cache kmalloc-4k of size 4096 The buggy address is located 3856 bytes to the right of 4096-byte region [ffff8881b09ce080, ffff8881b09cf080) The buggy address belongs to the page: page:ffffea0006c27380 count:1 mapcount:0 mapping:ffff8881da800dc0 index:0x0 compound_mapcount: 0 flags: 0x2fffc0000010200(slab|head) raw: 02fffc0000010200 ffffea00070ee188 ffffea0006ff4d08 ffff8881da800dc0 raw: 0000000000000000 ffff8881b09ce080 0000000100000001 0000000000000000 page dumped because: kasan: bad access detected Memory state around the buggy address: ffff8881b09cfe80: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 ffff8881b09cff00: 00 00 00 00 00 fc fc fc fc fc fc fc fc fc fc fc >ffff8881b09cff80: fc fc fc fc fc fc fc fc fc fc fc f1 f1 f1 f1 00 ^ ffff8881b09d0000: f2 f2 f2 00 00 00 00 00 00 00 00 00 00 00 00 00 ffff8881b09d0080: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 ==================================================================
Time | Kernel | Commit | Syzkaller | Config | Log | Report | Syz repro | C repro | VM info | Assets (help?) | Manager | Title |
---|---|---|---|---|---|---|---|---|---|---|---|---|
2018/12/17 17:45 | upstream | 7566ec393f41 | def91db3 | .config | console log | report | ci-upstream-kasan-gce-smack-root | |||||
2018/11/21 14:59 | upstream | c8ce94b8fe53 | 5d9a3924 | .config | console log | report | ci-upstream-kasan-gce-root | |||||
2018/11/26 21:28 | linux-next | 442b8cea2477 | ac912200 | .config | console log | report | ci-upstream-linux-next-kasan-gce-root | |||||
2018/10/14 07:50 | linux-next | 774ea0551a29 | caf12900 | .config | console log | report | ci-upstream-linux-next-kasan-gce-root | |||||
2018/10/04 19:28 | linux-next | 25bcda3e8b9f | 8b311eaf | .config | console log | report | ci-upstream-linux-next-kasan-gce-root |