mac80211_hwsim: wmediumd released netlink socket, switching to perfect channel medium ================================================================== BUG: KASAN: use-after-free in get_kprobe kernel/kprobes.c:372 [inline] BUG: KASAN: use-after-free in get_optimized_kprobe+0x184/0x1c0 kernel/kprobes.c:489 Read of size 8 at addr ffff888049e54a28 by task syz-executor.6/12137 CPU: 0 PID: 12137 Comm: syz-executor.6 Not tainted 5.10.90 #1 Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS rel-1.14.0-0-g155821a1990b-prebuilt.qemu.org 04/01/2014 Call Trace: __dump_stack lib/dump_stack.c:77 [inline] dump_stack+0x107/0x163 lib/dump_stack.c:118 print_address_description.constprop.0+0x1c/0x210 mm/kasan/report.c:385 __kasan_report mm/kasan/report.c:545 [inline] kasan_report.cold+0x37/0x7c mm/kasan/report.c:562 get_kprobe kernel/kprobes.c:372 [inline] get_optimized_kprobe+0x184/0x1c0 kernel/kprobes.c:489 __disarm_kprobe+0x80/0x120 kernel/kprobes.c:978 disarm_kprobe kernel/kprobes.c:1154 [inline] __disable_kprobe+0x235/0x350 kernel/kprobes.c:1793 disable_kprobe+0x25/0x70 kernel/kprobes.c:2299 __disable_trace_kprobe+0xef/0x180 kernel/trace/trace_kprobe.c:344 disable_trace_kprobe+0x231/0x2d0 kernel/trace/trace_kprobe.c:422 kprobe_register+0x61/0xb0 kernel/trace/trace_kprobe.c:1710 perf_trace_event_unreg.isra.0+0xb0/0x210 kernel/trace/trace_event_perf.c:162 perf_kprobe_destroy+0xc0/0x130 kernel/trace/trace_event_perf.c:294 _free_event+0x159/0xc70 kernel/events/core.c:4892 put_event kernel/events/core.c:4986 [inline] perf_event_release_kernel+0x899/0xc20 kernel/events/core.c:5101 perf_release+0x33/0x40 kernel/events/core.c:5111 __fput+0x285/0x980 fs/file_table.c:281 task_work_run+0xe2/0x1a0 kernel/task_work.c:151 tracehook_notify_resume include/linux/tracehook.h:188 [inline] exit_to_user_mode_loop kernel/entry/common.c:164 [inline] exit_to_user_mode_prepare+0x155/0x160 kernel/entry/common.c:191 syscall_exit_to_user_mode+0x38/0x230 kernel/entry/common.c:266 entry_SYSCALL_64_after_hwframe+0x44/0xa9 RIP: 0033:0x7f41f5f2f72b Code: 0f 05 48 3d 00 f0 ff ff 77 45 c3 0f 1f 40 00 48 83 ec 18 89 7c 24 0c e8 63 fc ff ff 8b 7c 24 0c 41 89 c0 b8 03 00 00 00 0f 05 <48> 3d 00 f0 ff ff 77 35 44 89 c7 89 44 24 0c e8 a1 fc ff ff 8b 44 RSP: 002b:00007ffee7a933f0 EFLAGS: 00000293 ORIG_RAX: 0000000000000003 RAX: 0000000000000000 RBX: 0000000000000005 RCX: 00007f41f5f2f72b RDX: 00007f41f60955c0 RSI: 0000000000000081 RDI: 0000000000000004 RBP: 0000000000000000 R08: 0000000000000000 R09: 0000000000000000 R10: 0000000000000000 R11: 0000000000000293 R12: 00007f41f60955c0 R13: 00007ffee7a93510 R14: 00007f41f608ff60 R15: 000000000022fdcb Allocated by task 12140: kasan_save_stack+0x1b/0x40 mm/kasan/common.c:48 kasan_set_track mm/kasan/common.c:56 [inline] __kasan_kmalloc.constprop.0+0xc2/0xd0 mm/kasan/common.c:461 kmalloc include/linux/slab.h:552 [inline] kzalloc include/linux/slab.h:664 [inline] alloc_aggr_kprobe+0x41/0x190 kernel/kprobes.c:822 try_to_optimize_kprobe kernel/kprobes.c:853 [inline] register_kprobe kernel/kprobes.c:1740 [inline] register_kprobe+0xb78/0x1330 kernel/kprobes.c:1682 __register_trace_kprobe kernel/trace/trace_kprobe.c:514 [inline] __register_trace_kprobe+0x262/0x2d0 kernel/trace/trace_kprobe.c:482 create_local_trace_kprobe+0x1e6/0x3b0 kernel/trace/trace_kprobe.c:1837 perf_kprobe_init+0x18c/0x280 kernel/trace/trace_event_perf.c:272 perf_kprobe_event_init+0xf8/0x1c0 kernel/events/core.c:9602 perf_try_init_event+0x130/0x570 kernel/events/core.c:10980 perf_init_event kernel/events/core.c:11032 [inline] perf_event_alloc.part.0+0xd96/0x2b30 kernel/events/core.c:11310 perf_event_alloc kernel/events/core.c:11689 [inline] __do_sys_perf_event_open+0x57c/0x2d00 kernel/events/core.c:11787 do_syscall_64+0x33/0x40 arch/x86/entry/common.c:46 entry_SYSCALL_64_after_hwframe+0x44/0xa9 Freed by task 10297: kasan_save_stack+0x1b/0x40 mm/kasan/common.c:48 kasan_set_track+0x1c/0x30 mm/kasan/common.c:56 kasan_set_free_info+0x1b/0x30 mm/kasan/generic.c:355 __kasan_slab_free+0x110/0x150 mm/kasan/common.c:422 slab_free_hook mm/slub.c:1542 [inline] slab_free_freelist_hook+0xa9/0x180 mm/slub.c:1576 slab_free mm/slub.c:3149 [inline] kfree+0xd7/0x380 mm/slub.c:4125 free_aggr_kprobe kernel/kprobes.c:434 [inline] do_free_cleaned_kprobes kernel/kprobes.c:586 [inline] kprobe_optimizer+0x56f/0x7e0 kernel/kprobes.c:624 process_one_work+0x9a9/0x1590 kernel/workqueue.c:2270 worker_thread+0x61d/0x1310 kernel/workqueue.c:2416 kthread+0x38f/0x470 kernel/kthread.c:313 ret_from_fork+0x22/0x30 arch/x86/entry/entry_64.S:296 Last call_rcu(): kasan_save_stack+0x1b/0x40 mm/kasan/common.c:48 kasan_record_aux_stack+0x9e/0xb0 mm/kasan/generic.c:346 __call_rcu kernel/rcu/tree.c:2962 [inline] call_rcu+0x8a/0xa00 kernel/rcu/tree.c:3036 neigh_parms_release net/core/neighbour.c:1675 [inline] neigh_parms_release+0x178/0x1d0 net/core/neighbour.c:1665 inetdev_destroy net/ipv4/devinet.c:325 [inline] inetdev_event+0x1007/0x1550 net/ipv4/devinet.c:1599 notifier_call_chain kernel/notifier.c:83 [inline] raw_notifier_call_chain+0xb3/0x110 kernel/notifier.c:410 call_netdevice_notifiers_info+0xb5/0x130 net/core/dev.c:2047 call_netdevice_notifiers_extack net/core/dev.c:2059 [inline] call_netdevice_notifiers net/core/dev.c:2073 [inline] rollback_registered_many+0x83d/0x1270 net/core/dev.c:9552 rollback_registered net/core/dev.c:9597 [inline] unregister_netdevice_queue+0x1fd/0x420 net/core/dev.c:10742 unregister_netdevice include/linux/netdevice.h:2868 [inline] __tun_detach+0xfa8/0x1240 drivers/net/tun.c:681 tun_detach drivers/net/tun.c:698 [inline] tun_chr_close+0xc4/0x180 drivers/net/tun.c:3450 __fput+0x285/0x980 fs/file_table.c:281 task_work_run+0xe2/0x1a0 kernel/task_work.c:151 tracehook_notify_resume include/linux/tracehook.h:188 [inline] exit_to_user_mode_loop kernel/entry/common.c:164 [inline] exit_to_user_mode_prepare+0x155/0x160 kernel/entry/common.c:191 syscall_exit_to_user_mode+0x38/0x230 kernel/entry/common.c:266 entry_SYSCALL_64_after_hwframe+0x44/0xa9 The buggy address belongs to the object at ffff888049e54a00 which belongs to the cache kmalloc-192 of size 192 The buggy address is located 40 bytes inside of 192-byte region [ffff888049e54a00, ffff888049e54ac0) The buggy address belongs to the page: page:000000006ad14c35 refcount:1 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0x49e54 flags: 0x100000000000200(slab) raw: 0100000000000200 ffffea0000218300 0000000b0000000b ffff888007c41500 raw: 0000000000000000 0000000080100010 00000001ffffffff 0000000000000000 page dumped because: kasan: bad access detected Memory state around the buggy address: ffff888049e54900: fa fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb ffff888049e54980: fb fb fb fb fb fb fb fb fc fc fc fc fc fc fc fc >ffff888049e54a00: fa fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb ^ ffff888049e54a80: fb fb fb fb fb fb fb fb fc fc fc fc fc fc fc fc ffff888049e54b00: fa fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb ================================================================== mac80211_hwsim: wmediumd released netlink socket, switching to perfect channel medium mac80211_hwsim: wmediumd released netlink socket, switching to perfect channel medium ------------[ cut here ]------------ WARNING: CPU: 1 PID: 12174 at kernel/kprobes.c:764 reuse_unused_kprobe kernel/kprobes.c:764 [inline] WARNING: CPU: 1 PID: 12174 at kernel/kprobes.c:764 register_aggr_kprobe kernel/kprobes.c:1447 [inline] WARNING: CPU: 1 PID: 12174 at kernel/kprobes.c:764 register_kprobe kernel/kprobes.c:1713 [inline] WARNING: CPU: 1 PID: 12174 at kernel/kprobes.c:764 register_kprobe+0x1008/0x1330 kernel/kprobes.c:1682 Modules linked in: CPU: 1 PID: 12174 Comm: syz-executor.6 Tainted: G B 5.10.90 #1 Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS rel-1.14.0-0-g155821a1990b-prebuilt.qemu.org 04/01/2014 RIP: 0010:reuse_unused_kprobe kernel/kprobes.c:764 [inline] RIP: 0010:register_aggr_kprobe kernel/kprobes.c:1447 [inline] RIP: 0010:register_kprobe kernel/kprobes.c:1713 [inline] RIP: 0010:register_kprobe+0x1008/0x1330 kernel/kprobes.c:1682 Code: 4d 89 6c 24 08 e8 58 64 ff ff 41 89 dc 48 b8 22 01 00 00 00 00 ad de 48 89 45 08 e8 82 e7 ed ff e9 5b f9 ff ff e8 38 64 ff ff <0f> 0b e9 9d fc ff ff 4c 89 ff e8 b9 af 2a 00 e9 99 f5 ff ff e8 af RSP: 0018:ffff88804b38fbd0 EFLAGS: 00010216 RAX: 000000000000b3ee RBX: ffff888049e54a78 RCX: ffffc90004a0c000 RDX: 0000000000040000 RSI: ffffffff81403578 RDI: ffff888049e54a78 RBP: ffff88800fb94818 R08: 0000000000000000 R09: ffffffff84ce8dc7 R10: 0000000000000000 R11: 0000000000000001 R12: 0000000000000000 R13: ffff88800fb94828 R14: ffff888049e54a70 R15: ffff888049e54a00 FS: 00007f41f34f2700(0000) GS:ffff88806cf00000(0000) knlGS:0000000000000000 CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033 CR2: 00007f41f6090018 CR3: 0000000048304000 CR4: 0000000000350ee0 Call Trace: __register_trace_kprobe kernel/trace/trace_kprobe.c:514 [inline] __register_trace_kprobe+0x262/0x2d0 kernel/trace/trace_kprobe.c:482 create_local_trace_kprobe+0x1e6/0x3b0 kernel/trace/trace_kprobe.c:1837 perf_kprobe_init+0x18c/0x280 kernel/trace/trace_event_perf.c:272 perf_kprobe_event_init+0xf8/0x1c0 kernel/events/core.c:9602 perf_try_init_event+0x130/0x570 kernel/events/core.c:10980 perf_init_event kernel/events/core.c:11032 [inline] perf_event_alloc.part.0+0xd96/0x2b30 kernel/events/core.c:11310 perf_event_alloc kernel/events/core.c:11689 [inline] __do_sys_perf_event_open+0x57c/0x2d00 kernel/events/core.c:11787 do_syscall_64+0x33/0x40 arch/x86/entry/common.c:46 entry_SYSCALL_64_after_hwframe+0x44/0xa9 RIP: 0033:0x7f41f5f7cb19 Code: ff ff c3 66 2e 0f 1f 84 00 00 00 00 00 0f 1f 40 00 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 73 01 c3 48 c7 c1 bc ff ff ff f7 d8 64 89 01 48 RSP: 002b:00007f41f34f2188 EFLAGS: 00000246 ORIG_RAX: 000000000000012a RAX: ffffffffffffffda RBX: 00007f41f608ff60 RCX: 00007f41f5f7cb19 RDX: 0000000000000000 RSI: 0000000000000000 RDI: 0000000020001d80 RBP: 00007f41f5fd6f6d R08: 0000000000000000 R09: 0000000000000000 R10: ffffffffffffffff R11: 0000000000000246 R12: 0000000000000000 R13: 00007ffee7a9338f R14: 00007f41f34f2300 R15: 0000000000022000 irq event stamp: 0 hardirqs last enabled at (0): [<0000000000000000>] 0x0 hardirqs last disabled at (0): [] copy_process+0x159f/0x66c0 kernel/fork.c:2050 softirqs last enabled at (0): [] copy_process+0x15e0/0x66c0 kernel/fork.c:2054 mac80211_hwsim: wmediumd released netlink socket, switching to perfect channel medium softirqs last disabled at (0): [<0000000000000000>] 0x0 ---[ end trace 2a39ae72f2a461ef ]--- mac80211_hwsim: wmediumd released netlink socket, switching to perfect channel medium general protection fault, probably for non-canonical address 0xfd7ffc5280000507: 0000 [#1] SMP KASAN NOPTI KASAN: maybe wild-memory-access in range [0xec00029400002838-0xec0002940000283f] CPU: 0 PID: 12172 Comm: syz-executor.6 Tainted: G B W 5.10.90 #1 Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS rel-1.14.0-0-g155821a1990b-prebuilt.qemu.org 04/01/2014 RIP: 0010:__hlist_del include/linux/list.h:838 [inline] RIP: 0010:hlist_del_rcu include/linux/rculist.h:514 [inline] RIP: 0010:__unregister_kprobe_top+0x3a3/0x550 kernel/kprobes.c:1859 Code: 00 fc ff df 48 89 fa 48 c1 ea 03 80 3c 02 00 0f 85 ab 01 00 00 48 b8 00 00 00 00 00 fc ff df 4c 8b 65 08 4c 89 e2 48 c1 ea 03 <80> 3c 02 00 0f 85 44 01 00 00 49 89 1c 24 48 85 db 74 28 e8 25 9b RSP: 0018:ffff88804f35fca8 EFLAGS: 00010212 RAX: dffffc0000000000 RBX: ffff88804612e780 RCX: ffffffff8140000e RDX: 1d80005280000507 RSI: 0000000000000008 RDI: ffff888049e54a08 RBP: ffff888049e54a00 R08: 0000000000000000 R09: ffffffff84e33987 R10: 0000000000000000 R11: 0000000000000001 R12: ec00029400002839 R13: ffffffff813fab20 R14: ffff888049e54a70 R15: 0000000000000001 FS: 0000555555bfa400(0000) GS:ffff88806ce00000(0000) knlGS:0000000000000000 CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033 CR2: 00007fc76bd23718 CR3: 0000000048304000 CR4: 0000000000350ef0 Call Trace: unregister_kprobes kernel/kprobes.c:1911 [inline] unregister_kprobes kernel/kprobes.c:1903 [inline] unregister_kprobe+0x26/0xc0 kernel/kprobes.c:1899 __unregister_trace_kprobe+0x1a2/0x210 kernel/trace/trace_kprobe.c:526 destroy_local_trace_kprobe+0xc8/0x170 kernel/trace/trace_kprobe.c:1860 _free_event+0x159/0xc70 kernel/events/core.c:4892 put_event kernel/events/core.c:4986 [inline] perf_event_release_kernel+0x899/0xc20 kernel/events/core.c:5101 perf_release+0x33/0x40 kernel/events/core.c:5111 __fput+0x285/0x980 fs/file_table.c:281 task_work_run+0xe2/0x1a0 kernel/task_work.c:151 tracehook_notify_resume include/linux/tracehook.h:188 [inline] exit_to_user_mode_loop kernel/entry/common.c:164 [inline] exit_to_user_mode_prepare+0x155/0x160 kernel/entry/common.c:191 syscall_exit_to_user_mode+0x38/0x230 kernel/entry/common.c:266 entry_SYSCALL_64_after_hwframe+0x44/0xa9 RIP: 0033:0x7f41f5f2f72b Code: 0f 05 48 3d 00 f0 ff ff 77 45 c3 0f 1f 40 00 48 83 ec 18 89 7c 24 0c e8 63 fc ff ff 8b 7c 24 0c 41 89 c0 b8 03 00 00 00 0f 05 <48> 3d 00 f0 ff ff 77 35 44 89 c7 89 44 24 0c e8 a1 fc ff ff 8b 44 RSP: 002b:00007ffee7a933f0 EFLAGS: 00000293 ORIG_RAX: 0000000000000003 RAX: 0000000000000000 RBX: 0000000000000004 RCX: 00007f41f5f2f72b RDX: 00007f41f60955c0 RSI: 0000000000000081 RDI: 0000000000000003 RBP: 0000000000000000 R08: 0000000000000000 R09: 0000000000000000 R10: 0000000000000000 R11: 0000000000000293 R12: 00007f41f60955c0 R13: 00007ffee7a93510 R14: 00007f41f608ff60 R15: 000000000022ff87 Modules linked in: ---[ end trace 2a39ae72f2a461f0 ]--- RIP: 0010:__hlist_del include/linux/list.h:838 [inline] RIP: 0010:hlist_del_rcu include/linux/rculist.h:514 [inline] RIP: 0010:__unregister_kprobe_top+0x3a3/0x550 kernel/kprobes.c:1859 Code: 00 fc ff df 48 89 fa 48 c1 ea 03 80 3c 02 00 0f 85 ab 01 00 00 48 b8 00 00 00 00 00 fc ff df 4c 8b 65 08 4c 89 e2 48 c1 ea 03 <80> 3c 02 00 0f 85 44 01 00 00 49 89 1c 24 48 85 db 74 28 e8 25 9b RSP: 0018:ffff88804f35fca8 EFLAGS: 00010212 RAX: dffffc0000000000 RBX: ffff88804612e780 RCX: ffffffff8140000e RDX: 1d80005280000507 RSI: 0000000000000008 RDI: ffff888049e54a08 RBP: ffff888049e54a00 R08: 0000000000000000 R09: ffffffff84e33987 R10: 0000000000000000 R11: 0000000000000001 R12: ec00029400002839 R13: ffffffff813fab20 R14: ffff888049e54a70 R15: 0000000000000001 FS: 0000555555bfa400(0000) GS:ffff88806ce00000(0000) knlGS:0000000000000000 CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033 CR2: 00007fc76bd23718 CR3: 0000000048304000 CR4: 0000000000350ef0 mac80211_hwsim: wmediumd released netlink socket, switching to perfect channel medium mac80211_hwsim: wmediumd released netlink socket, switching to perfect channel medium ---------------- Code disassembly (best guess), 3 bytes skipped: 0: df 48 89 fisttps -0x77(%rax) 3: fa cli 4: 48 c1 ea 03 shr $0x3,%rdx 8: 80 3c 02 00 cmpb $0x0,(%rdx,%rax,1) c: 0f 85 ab 01 00 00 jne 0x1bd 12: 48 b8 00 00 00 00 00 movabs $0xdffffc0000000000,%rax 19: fc ff df 1c: 4c 8b 65 08 mov 0x8(%rbp),%r12 20: 4c 89 e2 mov %r12,%rdx 23: 48 c1 ea 03 shr $0x3,%rdx * 27: 80 3c 02 00 cmpb $0x0,(%rdx,%rax,1) <-- trapping instruction 2b: 0f 85 44 01 00 00 jne 0x175 31: 49 89 1c 24 mov %rbx,(%r12) 35: 48 85 db test %rbx,%rbx 38: 74 28 je 0x62 3a: e8 .byte 0xe8 3b: 25 .byte 0x25 3c: 9b fwait