FAT-fs (loop5): Invalid FSINFO signature: 0x00000000, 0x00000000 (sector = 1) FAT-fs (loop4): Invalid FSINFO signature: 0x00000000, 0x00000000 (sector = 1) ================================================================== 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 ffff8880442a9028 by task syz-executor.6/10461 CPU: 1 PID: 10461 Comm: syz-executor.6 Not tainted 5.10.52 #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:2296 __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:1706 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:4887 put_event kernel/events/core.c:4981 [inline] perf_event_release_kernel+0x899/0xc20 kernel/events/core.c:5096 perf_release+0x33/0x40 kernel/events/core.c:5106 __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: 0033:0x4193eb 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:00007ffc54b8d6a0 EFLAGS: 00000293 ORIG_RAX: 0000000000000003 RAX: 0000000000000000 RBX: 0000000000000004 RCX: 00000000004193eb RDX: 0000000000570a68 RSI: ffffffff83c44b3d RDI: 0000000000000003 RBP: 0000000000000001 R08: 0000000000000000 R09: 0000001b2c52001c R10: 0000000000001072 R11: 0000000000000293 R12: 0000000000157cee R13: 00000000000003e8 R14: 000000000056bf80 R15: 0000000000157cdf Allocated by task 10465: 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:1833 perf_kprobe_init+0x18c/0x280 kernel/trace/trace_event_perf.c:272 perf_kprobe_event_init+0xf8/0x1c0 kernel/events/core.c:9595 perf_try_init_event+0x130/0x570 kernel/events/core.c:10973 perf_init_event kernel/events/core.c:11025 [inline] perf_event_alloc.part.0+0xd96/0x2b30 kernel/events/core.c:11303 perf_event_alloc kernel/events/core.c:11682 [inline] __do_sys_perf_event_open+0x57c/0x2d00 kernel/events/core.c:11780 do_syscall_64+0x33/0x40 arch/x86/entry/common.c:46 entry_SYSCALL_64_after_hwframe+0x44/0xa9 Freed by task 9833: 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+0x64/0x150 mm/slub.c:1575 slab_free mm/slub.c:3140 [inline] kfree+0xca/0x360 mm/slub.c:4116 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:292 ret_from_fork+0x22/0x30 arch/x86/entry/entry_64.S:296 The buggy address belongs to the object at ffff8880442a9000 which belongs to the cache kmalloc-192 of size 192 The buggy address is located 40 bytes inside of 192-byte region [ffff8880442a9000, ffff8880442a90c0) The buggy address belongs to the page: page:0000000077883c89 refcount:1 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0x442a9 flags: 0x100000000000200(slab) raw: 0100000000000200 ffffea000086c640 0000000400000004 ffff888007c41500 raw: 0000000000000000 0000000080100010 00000001ffffffff 0000000000000000 page dumped because: kasan: bad access detected Memory state around the buggy address: ffff8880442a8f00: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 ffff8880442a8f80: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 >ffff8880442a9000: fa fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb ^ ffff8880442a9080: fb fb fb fb fb fb fb fb fc fc fc fc fc fc fc fc ffff8880442a9100: fa fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb ================================================================== FAT-fs (loop4): Invalid FSINFO signature: 0x00000000, 0x00000000 (sector = 1) FAT-fs (loop5): Invalid FSINFO signature: 0x00000000, 0x00000000 (sector = 1) FAT-fs (loop5): Invalid FSINFO signature: 0x00000000, 0x00000000 (sector = 1) FAT-fs (loop5): Invalid FSINFO signature: 0x00000000, 0x00000000 (sector = 1) ------------[ cut here ]------------ WARNING: CPU: 0 PID: 10498 at kernel/kprobes.c:764 reuse_unused_kprobe kernel/kprobes.c:764 [inline] WARNING: CPU: 0 PID: 10498 at kernel/kprobes.c:764 register_aggr_kprobe kernel/kprobes.c:1447 [inline] WARNING: CPU: 0 PID: 10498 at kernel/kprobes.c:764 register_kprobe kernel/kprobes.c:1713 [inline] WARNING: CPU: 0 PID: 10498 at kernel/kprobes.c:764 register_kprobe+0x1008/0x1330 kernel/kprobes.c:1682 Modules linked in: CPU: 0 PID: 10498 Comm: syz-executor.1 Tainted: G B 5.10.52 #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 62 f0 ed ff e9 5b f9 ff ff e8 38 64 ff ff <0f> 0b e9 9d fc ff ff 4c 89 ff e8 b9 9c 2a 00 e9 99 f5 ff ff e8 af RSP: 0018:ffff88804464fbd0 EFLAGS: 00010212 RAX: 000000000000b14b RBX: ffff8880442a9078 RCX: ffffc90002a02000 RDX: 0000000000040000 RSI: ffffffff814020f8 RDI: ffff8880442a9078 RBP: ffff88800d3e5818 R08: 0000000000000000 R09: ffffffff84ce8a47 R10: 0000000000000000 R11: 0000000000000001 R12: 0000000000000000 R13: ffff88800d3e5828 R14: ffff8880442a9070 R15: ffff8880442a9000 FS: 00007ff7be4ee700(0000) GS:ffff88806ce00000(0000) knlGS:0000000000000000 CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033 CR2: 0000000000970004 CR3: 00000000444a2000 CR4: 0000000000350ef0 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:1833 perf_kprobe_init+0x18c/0x280 kernel/trace/trace_event_perf.c:272 perf_kprobe_event_init+0xf8/0x1c0 kernel/events/core.c:9595 perf_try_init_event+0x130/0x570 kernel/events/core.c:10973 perf_init_event kernel/events/core.c:11025 [inline] perf_event_alloc.part.0+0xd96/0x2b30 kernel/events/core.c:11303 perf_event_alloc kernel/events/core.c:11682 [inline] __do_sys_perf_event_open+0x57c/0x2d00 kernel/events/core.c:11780 do_syscall_64+0x33/0x40 arch/x86/entry/common.c:46 entry_SYSCALL_64_after_hwframe+0x44/0xa9 RIP: 0033:0x466609 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:00007ff7be4ee188 EFLAGS: 00000246 ORIG_RAX: 000000000000012a RAX: ffffffffffffffda RBX: 000000000056bf80 RCX: 0000000000466609 RDX: 0000000000000000 RSI: 0000000000000000 RDI: 0000000020001d80 RBP: 00000000004bfcb9 R08: 0000000000000000 R09: 0000000000000000 R10: ffffffffffffffff R11: 0000000000000246 R12: 000000000056bf80 R13: 00007ffd3b40d08f R14: 00007ff7be4ee300 R15: 0000000000022000 irq event stamp: 0 hardirqs last enabled at (0): [<0000000000000000>] 0x0 hardirqs last disabled at (0): [] copy_process+0x15bc/0x6650 kernel/fork.c:2049 softirqs last enabled at (0): [] copy_process+0x15fd/0x6650 kernel/fork.c:2053 softirqs last disabled at (0): [<0000000000000000>] 0x0 ---[ end trace 2966c96f8cea30d6 ]--- FAT-fs (loop5): Invalid FSINFO signature: 0x00000000, 0x00000000 (sector = 1) FAT-fs (loop4): Invalid FSINFO signature: 0x00000000, 0x00000000 (sector = 1) general protection fault, probably for non-canonical address 0xfcbbfc34e00004cd: 0000 [#1] SMP KASAN NOPTI KASAN: maybe wild-memory-access in range [0xe5e001a700002668-0xe5e001a70000266f] CPU: 0 PID: 10493 Comm: syz-executor.1 Tainted: G B W 5.10.52 #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:ffff8880218bfca8 EFLAGS: 00010212 RAX: dffffc0000000000 RBX: ffff8880085ecdb0 RCX: ffffffff813feb8e RDX: 1cbc0034e00004cd RSI: 0000000000000008 RDI: ffff8880442a9008 RBP: ffff8880442a9000 R08: 0000000000000000 R09: ffffffff84e336a7 R10: 0000000000000000 R11: 0000000000000001 R12: e5e001a700002669 R13: ffffffff813f96a0 R14: ffff8880442a9070 R15: 0000000000000001 FS: 000000000184c400(0000) GS:ffff88806ce00000(0000) knlGS:0000000000000000 CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033 CR2: 00007ffedcbedf68 CR3: 00000000444a2000 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:1856 _free_event+0x159/0xc70 kernel/events/core.c:4887 put_event kernel/events/core.c:4981 [inline] perf_event_release_kernel+0x899/0xc20 kernel/events/core.c:5096 perf_release+0x33/0x40 kernel/events/core.c:5106 __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: 0033:0x4193eb 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:00007ffd3b40d0f0 EFLAGS: 00000293 ORIG_RAX: 0000000000000003 RAX: 0000000000000000 RBX: 0000000000000004 RCX: 00000000004193eb RDX: 00000000005714d0 RSI: 0000000000000081 RDI: 0000000000000003 RBP: 0000000000000000 R08: 0000000000000000 R09: 0000000000000000 R10: 0000000000000000 R11: 0000000000000293 R12: 00000000005714d0 R13: 00007ffd3b40d210 R14: 000000000056bf80 R15: 0000000000159d2a Modules linked in: ---[ end trace 2966c96f8cea30d7 ]--- 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:ffff8880218bfca8 EFLAGS: 00010212 RAX: dffffc0000000000 RBX: ffff8880085ecdb0 RCX: ffffffff813feb8e RDX: 1cbc0034e00004cd RSI: 0000000000000008 RDI: ffff8880442a9008 RBP: ffff8880442a9000 R08: 0000000000000000 R09: ffffffff84e336a7 R10: 0000000000000000 R11: 0000000000000001 R12: e5e001a700002669 R13: ffffffff813f96a0 R14: ffff8880442a9070 R15: 0000000000000001 FS: 000000000184c400(0000) GS:ffff88806ce00000(0000) knlGS:0000000000000000 CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033 CR2: 00007ffedcbedf68 CR3: 00000000444a2000 CR4: 0000000000350ef0 FAT-fs (loop4): Invalid FSINFO signature: 0x00000000, 0x00000000 (sector = 1) FAT-fs (loop5): Invalid FSINFO signature: 0x00000000, 0x00000000 (sector = 1) FAT-fs (loop5): Invalid FSINFO signature: 0x00000000, 0x00000000 (sector = 1) FAT-fs (loop4): Invalid FSINFO signature: 0x00000000, 0x00000000 (sector = 1) FAT-fs (loop5): Invalid FSINFO signature: 0x00000000, 0x00000000 (sector = 1) FAT-fs (loop4): Invalid FSINFO signature: 0x00000000, 0x00000000 (sector = 1)