================================================================== BUG: KASAN: use-after-free in __read_once_size include/linux/compiler.h:191 [inline] BUG: KASAN: use-after-free in list_empty include/linux/list.h:226 [inline] BUG: KASAN: use-after-free in bpf_prog_ksym_node_add kernel/bpf/core.c:579 [inline] BUG: KASAN: use-after-free in bpf_prog_kallsyms_add+0xaa5/0xaf0 kernel/bpf/core.c:611 Read of size 8 at addr ffff88804e2030e8 by task syz-executor2/27659 CPU: 0 PID: 27659 Comm: syz-executor2 Not tainted 5.0.0-rc2+ #4 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+0x1db/0x2d0 lib/dump_stack.c:113 print_address_description.cold+0x7c/0x20d mm/kasan/report.c:187 kasan_report.cold+0x1b/0x40 mm/kasan/report.c:317 __asan_report_load8_noabort+0x14/0x20 mm/kasan/generic_report.c:135 __read_once_size include/linux/compiler.h:191 [inline] list_empty include/linux/list.h:226 [inline] bpf_prog_ksym_node_add kernel/bpf/core.c:579 [inline] bpf_prog_kallsyms_add+0xaa5/0xaf0 kernel/bpf/core.c:611 bpf_prog_load+0x13a9/0x1d00 kernel/bpf/syscall.c:1556 __do_sys_bpf+0xc52/0x4410 kernel/bpf/syscall.c:2618 __se_sys_bpf kernel/bpf/syscall.c:2580 [inline] __x64_sys_bpf+0x73/0xb0 kernel/bpf/syscall.c:2580 do_syscall_64+0x1a3/0x800 arch/x86/entry/common.c:290 entry_SYSCALL_64_after_hwframe+0x49/0xbe RIP: 0033:0x457ec9 Code: 6d b7 fb ff c3 66 2e 0f 1f 84 00 00 00 00 00 66 90 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 3b b7 fb ff c3 66 2e 0f 1f 84 00 00 00 00 RSP: 002b:00007fd785ef9c78 EFLAGS: 00000246 ORIG_RAX: 0000000000000141 RAX: ffffffffffffffda RBX: 0000000000000003 RCX: 0000000000457ec9 RDX: 0000000000000048 RSI: 00000000200089c0 RDI: 0000000000000005 RBP: 000000000073bf00 R08: 0000000000000000 R09: 0000000000000000 R10: 0000000000000000 R11: 0000000000000246 R12: 00007fd785efa6d4 R13: 00000000004be236 R14: 00000000004ce640 R15: 00000000ffffffff Allocated by task 27659: save_stack+0x45/0xd0 mm/kasan/common.c:73 set_track mm/kasan/common.c:85 [inline] __kasan_kmalloc mm/kasan/common.c:496 [inline] __kasan_kmalloc.constprop.0+0xcf/0xe0 mm/kasan/common.c:469 kasan_kmalloc+0x9/0x10 mm/kasan/common.c:504 kmem_cache_alloc_trace+0x151/0x760 mm/slab.c:3609 kmalloc include/linux/slab.h:545 [inline] kzalloc include/linux/slab.h:740 [inline] bpf_prog_alloc+0x16a/0x410 kernel/bpf/core.c:92 bpf_prog_load+0x52e/0x1d00 kernel/bpf/syscall.c:1486 __do_sys_bpf+0xc52/0x4410 kernel/bpf/syscall.c:2618 __se_sys_bpf kernel/bpf/syscall.c:2580 [inline] __x64_sys_bpf+0x73/0xb0 kernel/bpf/syscall.c:2580 do_syscall_64+0x1a3/0x800 arch/x86/entry/common.c:290 entry_SYSCALL_64_after_hwframe+0x49/0xbe Freed by task 5971: save_stack+0x45/0xd0 mm/kasan/common.c:73 kobject: 'queues' (000000001556b0d0): kobject_uevent_env set_track mm/kasan/common.c:85 [inline] __kasan_slab_free+0x102/0x150 mm/kasan/common.c:458 kasan_slab_free+0xe/0x10 mm/kasan/common.c:466 __cache_free mm/slab.c:3487 [inline] kfree+0xcf/0x230 mm/slab.c:3806 bpf_jit_free+0xf9/0x430 bpf_prog_free_deferred+0x2db/0x410 kernel/bpf/core.c:1992 process_one_work+0xd0c/0x1ce0 kernel/workqueue.c:2153 worker_thread+0x143/0x14a0 kernel/workqueue.c:2296 kobject: 'queues' (000000001556b0d0): kobject_uevent_env: filter function caused the event to drop! kthread+0x357/0x430 kernel/kthread.c:246 ret_from_fork+0x3a/0x50 arch/x86/entry/entry_64.S:352 The buggy address belongs to the object at ffff88804e203080 which belongs to the cache kmalloc-512 of size 512 The buggy address is located 104 bytes inside of 512-byte region [ffff88804e203080, ffff88804e203280) The buggy address belongs to the page: page:ffffea00013880c0 count:1 mapcount:0 mapping:ffff88812c3f0940 index:0x0 flags: 0x1fffc0000000200(slab) raw: 01fffc0000000200 ffffea00021bf988 ffffea000246a688 ffff88812c3f0940 raw: 0000000000000000 ffff88804e203080 0000000100000006 0000000000000000 kobject: 'rx-0' (0000000075bbacf8): kobject_add_internal: parent: 'queues', set: 'queues' page dumped because: kasan: bad access detected Memory state around the buggy address: ffff88804e202f80: fb fb fb fb fc fc fc fc fc fc fc fc fc fc fc fc ffff88804e203000: fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc >ffff88804e203080: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb ^ ffff88804e203100: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb ffff88804e203180: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb ==================================================================