================================================================== BUG: KASAN: use-after-free in bpf_tree_comp kernel/bpf/core.c:600 [inline] BUG: KASAN: use-after-free in __lt_find include/linux/rbtree_latch.h:115 [inline] BUG: KASAN: use-after-free in latch_tree_find include/linux/rbtree_latch.h:208 [inline] BUG: KASAN: use-after-free in bpf_prog_kallsyms_find kernel/bpf/core.c:674 [inline] BUG: KASAN: use-after-free in is_bpf_text_address+0x161/0x3b0 kernel/bpf/core.c:709 Read of size 8 at addr ffff888097fce088 by task udevd/8546 CPU: 1 PID: 8546 Comm: udevd Not tainted 5.4.0-rc4+ #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+0x1d8/0x2f8 lib/dump_stack.c:113 print_address_description+0x75/0x5c0 mm/kasan/report.c:374 __kasan_report+0x14b/0x1c0 mm/kasan/report.c:506 kasan_report+0x26/0x50 mm/kasan/common.c:634 __asan_report_load8_noabort+0x14/0x20 mm/kasan/generic_report.c:132 bpf_tree_comp kernel/bpf/core.c:600 [inline] __lt_find include/linux/rbtree_latch.h:115 [inline] latch_tree_find include/linux/rbtree_latch.h:208 [inline] bpf_prog_kallsyms_find kernel/bpf/core.c:674 [inline] is_bpf_text_address+0x161/0x3b0 kernel/bpf/core.c:709 kernel_text_address kernel/extable.c:147 [inline] __kernel_text_address+0x9a/0x110 kernel/extable.c:102 unwind_get_return_address+0x4c/0x90 arch/x86/kernel/unwind_frame.c:19 arch_stack_walk+0x98/0xe0 arch/x86/kernel/stacktrace.c:26 stack_trace_save+0xb6/0x150 kernel/stacktrace.c:123 save_stack mm/kasan/common.c:69 [inline] set_track mm/kasan/common.c:77 [inline] __kasan_kmalloc+0x11c/0x1b0 mm/kasan/common.c:510 kasan_slab_alloc+0xf/0x20 mm/kasan/common.c:518 slab_post_alloc_hook mm/slab.h:584 [inline] slab_alloc mm/slab.c:3319 [inline] kmem_cache_alloc_trace+0x1fa/0x2f0 mm/slab.c:3548 kmalloc include/linux/slab.h:556 [inline] kzalloc include/linux/slab.h:690 [inline] tomoyo_find_next_domain+0x99/0x1ca0 security/tomoyo/domain.c:708 tomoyo_bprm_check_security+0xe3/0x130 security/tomoyo/tomoyo.c:107 security_bprm_check+0x55/0xb0 security/security.c:784 search_binary_handler+0x6a/0x660 fs/exec.c:1646 exec_binprm fs/exec.c:1702 [inline] __do_execve_file+0x1573/0x1cc0 fs/exec.c:1822 do_execveat_common fs/exec.c:1868 [inline] do_execve fs/exec.c:1885 [inline] __do_sys_execve fs/exec.c:1961 [inline] __se_sys_execve fs/exec.c:1956 [inline] __x64_sys_execve+0x94/0xb0 fs/exec.c:1956 do_syscall_64+0xf7/0x1c0 arch/x86/entry/common.c:290 entry_SYSCALL_64_after_hwframe+0x49/0xbe RIP: 0033:0x7f8282942207 Code: 77 19 f4 48 89 d7 44 89 c0 0f 05 48 3d 00 f0 ff ff 76 e0 f7 d8 64 41 89 01 eb d8 f7 d8 64 41 89 01 eb df b8 3b 00 00 00 0f 05 <48> 3d 00 f0 ff ff 77 02 f3 c3 48 8b 15 00 8c 2d 00 f7 d8 64 89 02 RSP: 002b:00007fffa5aeec08 EFLAGS: 00000202 ORIG_RAX: 000000000000003b RAX: ffffffffffffffda RBX: 00000000ffffffff RCX: 00007f8282942207 RDX: 0000000000adc1b0 RSI: 00007fffa5aeed00 RDI: 00007fffa5aefd10 RBP: 0000000000625500 R08: 0000000000000f9e R09: 0000000000000f9e R10: 0000000000000000 R11: 0000000000000202 R12: 0000000000adc1b0 R13: 0000000000000007 R14: 0000000000ad7250 R15: 0000000000000005 Allocated by task 8544: save_stack mm/kasan/common.c:69 [inline] set_track mm/kasan/common.c:77 [inline] __kasan_kmalloc+0x11c/0x1b0 mm/kasan/common.c:510 kasan_kmalloc+0x9/0x10 mm/kasan/common.c:524 kmem_cache_alloc_trace+0x221/0x2f0 mm/slab.c:3550 kmalloc include/linux/slab.h:556 [inline] kzalloc include/linux/slab.h:690 [inline] bpf_prog_alloc_no_stats+0xdc/0x2b0 kernel/bpf/core.c:88 jit_subprogs kernel/bpf/verifier.c:8716 [inline] fixup_call_args kernel/bpf/verifier.c:8845 [inline] bpf_check+0xbe9a/0xe790 kernel/bpf/verifier.c:9349 bpf_prog_load kernel/bpf/syscall.c:1709 [inline] __do_sys_bpf+0x7a4f/0xbef0 kernel/bpf/syscall.c:2866 __se_sys_bpf kernel/bpf/syscall.c:2825 [inline] __x64_sys_bpf+0x7a/0x90 kernel/bpf/syscall.c:2825 do_syscall_64+0xf7/0x1c0 arch/x86/entry/common.c:290 entry_SYSCALL_64_after_hwframe+0x49/0xbe Freed by task 135: save_stack mm/kasan/common.c:69 [inline] set_track mm/kasan/common.c:77 [inline] kasan_set_free_info mm/kasan/common.c:332 [inline] __kasan_slab_free+0x12a/0x1e0 mm/kasan/common.c:471 kasan_slab_free+0xe/0x10 mm/kasan/common.c:480 __cache_free mm/slab.c:3425 [inline] kfree+0x115/0x200 mm/slab.c:3756 bpf_jit_free+0x189/0x1f0 bpf_prog_free_deferred+0x1b9/0x380 kernel/bpf/core.c:1980 process_one_work+0x7ef/0x10e0 kernel/workqueue.c:2269 worker_thread+0xc01/0x1630 kernel/workqueue.c:2415 kthread+0x332/0x350 kernel/kthread.c:255 ret_from_fork+0x24/0x30 arch/x86/entry/entry_64.S:352 The buggy address belongs to the object at ffff888097fce000 which belongs to the cache kmalloc-512 of size 512 The buggy address is located 136 bytes inside of 512-byte region [ffff888097fce000, ffff888097fce200) The buggy address belongs to the page: page:ffffea00025ff380 refcount:1 mapcount:0 mapping:ffff8880aa400a80 index:0xffff888097fce800 flags: 0x1fffc0000000200(slab) raw: 01fffc0000000200 ffffea000261e4c8 ffffea00029db648 ffff8880aa400a80 raw: ffff888097fce800 ffff888097fce000 0000000100000003 0000000000000000 page dumped because: kasan: bad access detected Memory state around the buggy address: ffff888097fcdf80: fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc ffff888097fce000: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb >ffff888097fce080: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb ^ ffff888097fce100: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb ffff888097fce180: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb ==================================================================