================================================================== BUG: KASAN: slab-out-of-bounds in predicate_parse kernel/trace/trace_events_filter.c:557 [inline] BUG: KASAN: slab-out-of-bounds in process_preds+0x1958/0x19b0 kernel/trace/trace_events_filter.c:1505 Write of size 4 at addr ffff8801cf62f270 by task syzkaller812470/4480 CPU: 0 PID: 4480 Comm: syzkaller812470 Not tainted 4.16.0+ #2 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+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 predicate_parse kernel/trace/trace_events_filter.c:557 [inline] process_preds+0x1958/0x19b0 kernel/trace/trace_events_filter.c:1505 create_filter+0x1a8/0x370 kernel/trace/trace_events_filter.c:1714 ftrace_profile_set_filter+0x109/0x2b0 kernel/trace/trace_events_filter.c:2042 perf_event_set_filter+0x248/0x1230 kernel/events/core.c:9064 _perf_ioctl+0x84c/0x15e0 kernel/events/core.c:5056 perf_ioctl+0x59/0x80 kernel/events/core.c:5107 vfs_ioctl fs/ioctl.c:46 [inline] file_ioctl fs/ioctl.c:500 [inline] do_vfs_ioctl+0x1cf/0x16a0 fs/ioctl.c:684 ksys_ioctl+0xa9/0xd0 fs/ioctl.c:701 SYSC_ioctl fs/ioctl.c:708 [inline] SyS_ioctl+0x24/0x30 fs/ioctl.c:706 do_syscall_64+0x29e/0x9d0 arch/x86/entry/common.c:287 entry_SYSCALL_64_after_hwframe+0x42/0xb7 RIP: 0033:0x43fdb9 RSP: 002b:00007ffe3956f9f8 EFLAGS: 00000213 ORIG_RAX: 0000000000000010 RAX: ffffffffffffffda RBX: 00000000004002c8 RCX: 000000000043fdb9 RDX: 0000000020000040 RSI: 0000000040082406 RDI: 0000000000000003 RBP: 00000000006ca018 R08: 00000000004002c8 R09: 00000000004002c8 R10: 0000000000000000 R11: 0000000000000213 R12: 00000000004016e0 R13: 0000000000401770 R14: 0000000000000000 R15: 0000000000000000 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 __do_kmalloc mm/slab.c:3718 [inline] __kmalloc+0x14e/0x760 mm/slab.c:3727 kmalloc include/linux/slab.h:517 [inline] kzalloc include/linux/slab.h:701 [inline] kobject_get_path+0xc2/0x1a0 lib/kobject.c:152 kobject_uevent_env+0x234/0xea0 lib/kobject_uevent.c:451 kobject_uevent+0x1f/0x30 lib/kobject_uevent.c:568 netdev_queue_add_kobject net/core/net-sysfs.c:1345 [inline] netdev_queue_update_kobjects+0x397/0x4e0 net/core/net-sysfs.c:1360 register_queue_kobjects net/core/net-sysfs.c:1402 [inline] netdev_register_kobject+0x299/0x380 net/core/net-sysfs.c:1608 register_netdevice+0x997/0x11c0 net/core/dev.c:7961 bond_create+0xf5/0x157 drivers/net/bonding/bond_main.c:4747 bonding_init+0x1666/0x16ff drivers/net/bonding/bond_main.c:4819 do_one_initcall+0x127/0x913 init/main.c:883 do_initcall_level init/main.c:951 [inline] do_initcalls init/main.c:959 [inline] do_basic_setup init/main.c:977 [inline] kernel_init_freeable+0x49b/0x58e init/main.c:1127 kernel_init+0x11/0x1b3 init/main.c:1053 ret_from_fork+0x3a/0x50 arch/x86/entry/entry_64.S:411 Freed by task 1: 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 kobject_uevent_env+0x275/0xea0 lib/kobject_uevent.c:551 kobject_uevent+0x1f/0x30 lib/kobject_uevent.c:568 netdev_queue_add_kobject net/core/net-sysfs.c:1345 [inline] netdev_queue_update_kobjects+0x397/0x4e0 net/core/net-sysfs.c:1360 register_queue_kobjects net/core/net-sysfs.c:1402 [inline] netdev_register_kobject+0x299/0x380 net/core/net-sysfs.c:1608 register_netdevice+0x997/0x11c0 net/core/dev.c:7961 bond_create+0xf5/0x157 drivers/net/bonding/bond_main.c:4747 bonding_init+0x1666/0x16ff drivers/net/bonding/bond_main.c:4819 do_one_initcall+0x127/0x913 init/main.c:883 do_initcall_level init/main.c:951 [inline] do_initcalls init/main.c:959 [inline] do_basic_setup init/main.c:977 [inline] kernel_init_freeable+0x49b/0x58e init/main.c:1127 kernel_init+0x11/0x1b3 init/main.c:1053 ret_from_fork+0x3a/0x50 arch/x86/entry/entry_64.S:411 The buggy address belongs to the object at ffff8801cf62f200 which belongs to the cache kmalloc-64 of size 64 The buggy address is located 48 bytes to the right of 64-byte region [ffff8801cf62f200, ffff8801cf62f240) The buggy address belongs to the page: page:ffffea00073d8bc0 count:1 mapcount:0 mapping:ffff8801cf62f000 index:0xffff8801cf62fc80 flags: 0x2fffc0000000100(slab) raw: 02fffc0000000100 ffff8801cf62f000 ffff8801cf62fc80 000000010000001c raw: ffffea00073c00e0 ffffea00074c0360 ffff8801dac00340 0000000000000000 page dumped because: kasan: bad access detected Memory state around the buggy address: ffff8801cf62f100: fb fb fb fb fb fb fb fb fc fc fc fc fc fc fc fc ffff8801cf62f180: fb fb fb fb fb fb fb fb fc fc fc fc fc fc fc fc >ffff8801cf62f200: fb fb fb fb fb fb fb fb fc fc fc fc fc fc fc fc ^ ffff8801cf62f280: 00 00 00 00 00 00 fc fc fc fc fc fc fc fc fc fc ffff8801cf62f300: 00 00 00 00 00 00 00 00 fc fc fc fc fc fc fc fc ==================================================================