program: r0 = syz_open_dev$tty1(0xc, 0x4, 0x1) r1 = dup(r0) r2 = bpf$BPF_PROG_RAW_TRACEPOINT_LOAD(0x5, &(0x7f0000000180)={0x11, 0x5, &(0x7f0000000280)=ANY=[@ANYBLOB="1801000021000000000000004cc311ec8500000075000000a70000000800000095"], &(0x7f0000000100)='GPL\x00', 0x0, 0x0, 0x0, 0x0, 0x0, '\x00', 0x0, 0x2}, 0x94) bpf$BPF_RAW_TRACEPOINT_OPEN(0x11, &(0x7f0000000540)={&(0x7f0000000000)='kfree\x00', r2}, 0x10) write$UHID_INPUT(r1, &(0x7f0000001980)={0x9, {"a2e3ad214fc752f91b2909094bf70e0dd038e7ff7fc6e5539b324c078b089b39373b6d1a0890e0878f0e1ac6e7049b076d959b669a240d5b67f3988f7ef319520100ffe8d178708c523c921b1b5b31300d356d0936cd3b78130daa61d8e809ea889b5802b77f07227227b7ba67e0e78669a6f5c2a874e62a9ccdc0d31a0c9f318c0da1993bd160e233df4a62179c6f30e065cd5b91cd0ae19397d696d0d758f2dc7d1c00305d3f46635eb016d5b1dda98e2d749be7bd1df1fb3b231fdcdb5075a9aaa1b469c3090000000002335875271b286329d169934288fd789aa37d6e98b224fd44b65b31334ffc55cc82cd3ac32ecdb08ced6f9081b4dd0d8b38f3cd4498bee800490841bdb114f6b76383709d8f5c55432a909fda039aec54a1236e80f6a8abadea7662496bddbb42be6bfb2f17959d1fe90a56c71b1931870262f5e801119242ca026bfc821e7e7daf2451138e645bb80c617601000000be70de98ec76a9e40dad47f36fd9f7d0d42a4b5f1185ccdcf16ff46295d8a0fa17713c5802630933a9a34af674f3f39fe23491237c08822dec110911e893d0a8c4f677747abc360934b82910ff85bfd995083bba2987a67399eac427d145d595a40b9f6ff14ac488ec130fb3850a27af9544ae15a7e454dea05918b41243513f000000000000000a3621c56cea8d20fa911a0c41db6ebe8cac64f17679141d54b34bbc9980000000b3309603f1d4ab966203861b5b15a841f2b575a8bd0d78248ebe4d9a80002695104f674c2431dca141fae269cab70e9a66f3c3a9a63e9639e1f59c0ede26c6b5d74b078a5e15c31634e5ae098ce9ee70771aaa18119a867e1088334975e9f73483b6c82fa678ca14ffd9f9db2a7869d85864056526f889af43a6056080572286522449df466c632b3570243f989cce3803f465e41e610c2021d653a5520000008213b704a5000000000000008ef9f190bae97909507041d860420c5664b27921b14dc1db8892fd32d0ad7bc94681359bad8deff4b05f60cea0da7710a80000000000008000bea37ce0d0d4aa202f928f28381aab144a5d429a04a6a2b83c7068ae949ed06e288e810bac9c76600025e19c907f8ea2e2010000008271a1f5f8528f227e79c1389dbdfffe492f21579d2c15b8c70cdb1c332d86d87341432750861ec2bc3451edca194b221cfec4603d276bbaa1dfa6d4e38a48a76eafc9a9a0270e4c10d64cd5a62427264f2377fe763c43470833ac96c45f357cbbaba8f1b1fdcc7cbb61a7cdb9744ed7f9129aede2be21ccfdc4e9134f8684b3a4f354da9a795e96334e207dff70f1988037b2ed3aaf575c0b88d8f146684078416d59fdee5325928974d12dad99dac44c3f0008047096a44002bebc2420aed92fa9b6578b4779415d97b9a6d6d5495c118045651cf41c2fc48b778efa5ea5677747430af4162b987b80c3e001cd34e5c92f76cc4c24eeb8bc4e9ac2bed9e53803edf1a4ae3a9737d214060005ea6f1783e287b3bee96e3a726eafe2fdfaa78d1f48c13b64df0784c8f4ceb360c7e658828563e2d25c4aa348561f927e88f63aa70e73a5e69b3df3495903f06572e1e007fa55a2999f596d067312f5779e8dbfdcf3427138f3d444d2639a10477f9bec4b4bbb6e3c04be68981f392203dd0ee3ef478e16dacfc5e3e03cf7ab8e3902f1b0ff034e00000000ca509383815b1b6fc6522d4e48604675fde2b94cf00500a2690891abf8ab9c015073014d9e08d4338b8780bdecd436cf0541359bafffa45237f104b96210403b2de9efed496f42355bc7872c827467cfa5c478b095b68441a34cb51682a8ae4d24ad92f243941ed274549b79a7962fb385a882e8020f06c4c2ba1dd5cac7c18876da865d258734dd73583df292892448039ef799cf0630becdbe6c4579b5561dc825ab829827945e020c1f67ee615feb6243378e0610060f02cca4e91b2f001edb3d78fb4b55668dda93ae62fccfcbb2b75a2183c46eb65ca8124e1b4da7fbb77ab2fc043aead87c32ab875ee7c2e7b7019c982cd3b43e4fb1a5fb135c0c7dcee8fe6516a328032f88c042891824659e9e01feffffffffffff83a2b210520106b8a358b50ab7a1fa89af9c251fe5294b3d1802d5676d95f160ec97b1ad94872cb2044642c37b4a6cc6c04effc1672db7e4b68d787d9a7a508ae54b3cd7369d75f2e8c77d95a3d361c040babb171607caac2a3559ad4f75465f49c0d0ae3716db6e00cb11db4a5fade2a57c10238e204a67737c3b42aa01b20f7694a00f16e2d0174035a2c22656dc00880acebdbe8ddbd75c2f998d8ac2dfad2ba3a50200000045a45957f24d758ed024b3849c11d412a2a03b4047497022d9c30e23ef4df5c89644f48bb536f7945b59d7bcddff754413d135273ea8e75f22f216c6b9990ae71806f2c00b4025c48b75c0f73cdb9a7b8fa367b50028067e7f16f4dd569d462f4f19eacdb3ed70eeebb4483f8fd777d443e8b40426db6fe2907ac0ca3d2414442e8f3a154704b0e51bc664a137b26be719f4f7c9a5678a674dfc95df80b9ce375dd649c8c704e509bd88c8e63d618e462071115c8982ba46af4d6adcc9f68a75b9397b035153faf463661c953fcad6f37525c1a0e94610dd94323f6c15d085197149bfd6655548cfd9c52c9711937f79abb1a124f1210465483cd3b2d78378cfb85ed82e7da0f6eb6d279f2ae455925d0f6f1ba571eba281f2a654fb39ddff3b484439ff158e7cd419e037f3e3ad038f2211f1033195563c7f93cd54b9094f226e783271e1e5a2a2c10712eab625d64931cd4ffe6738d97b9b5ef828ee9fb059fc01af0e79c1e14b1d25988c69a399567c1d93768f7971d31488b8658a20878b7c1dd7ba02fc42939dde3d4a3339a65d507dc59c51097b40517705da56e9ebf0afa53282bf86dbb58c548069ff6eb95aade7cc66d7bbef724779ca1f731b3346ff177050373d79ff7b3e7f9bc0c1b4b266a8878b90baaa039d3e3b63979ac3df6e6f4859afd50238c7547a39b60810938044ae185d2ba3e00a4e73676864ae090d81eaeecf1d0ab378dd4dd891e937c2ea5410e0513005000000000000003911fab964c271550027697b52160687461602f88df165d884b36ec2b6c25a2f33c715687e9d4afb96d6861aca47da73d6f3dd014e5c5ad8fe995754bd9cf32fce1e31919c4b2082fb0a30b9deae84bed4b28045634073c9c58c89d9e99c81769177c6ea94f88a4facfd4c735a20307c737afae5136651b1b9bd522dcb399473296b831dbd933d93994ba3064279b10ea0c5833f41f157ea2302993dbe433b1aa3a37684f4113c48859465c3b415c3432f81db8719539d5bf372aaaea1cc43a6c5cbe59758bfee2916580dac4b008e595f437491d87abed02cefcd9db53d94d02dae17b118e5d6787463183b4b87c105000000302a808d7f5251440613d17ca51055f2f416a44fe180d2d50c312cca7cb14a20dc331f57a9817139a206fc76957227ffff2de20a4b8e3737fbb4010000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0x1011}}, 0x1006) [ 83.174470][ T45] Bluetooth: hci0: command tx timeout [ 83.190510][ T1314] ieee802154 phy0 wpan0: encryption failed: -22 [ 83.194088][ T1314] ieee802154 phy1 wpan1: encryption failed: -22 [ 83.399830][ T5190] ================================================================== [ 83.404043][ T5190] BUG: KASAN: slab-use-after-free in bpf_trace_run2+0x2c4/0x840 [ 83.407817][ T5190] Read of size 8 at addr ffff888043d58280 by task dhcpcd/5190 [ 83.411368][ T5190] [ 83.412487][ T5190] CPU: 0 UID: 101 PID: 5190 Comm: dhcpcd Not tainted syzkaller #0 PREEMPT(full) [ 83.412504][ T5190] Hardware name: QEMU Standard PC (Q35 + ICH9, 2009), BIOS 1.16.3-debian-1.16.3-2 04/01/2014 [ 83.412512][ T5190] Call Trace: [ 83.412519][ T5190] [ 83.412525][ T5190] dump_stack_lvl+0xe8/0x150 [ 83.412544][ T5190] print_report+0xba/0x230 [ 83.412557][ T5190] ? bpf_trace_run2+0x2c4/0x840 [ 83.412571][ T5190] kasan_report+0x117/0x150 [ 83.412582][ T5190] ? bpf_trace_run2+0x2c4/0x840 [ 83.412596][ T5190] bpf_trace_run2+0x2c4/0x840 [ 83.412610][ T5190] ? __queue_work+0x1a1/0x1020 [ 83.412624][ T5190] ? bpf_trace_run2+0x1c9/0x840 [ 83.412637][ T5190] ? __pfx_bpf_trace_run2+0x10/0x10 [ 83.412650][ T5190] ? seccomp_filter_release+0x22b/0x2d0 [ 83.412663][ T5190] ? seccomp_filter_release+0x22b/0x2d0 [ 83.412672][ T5190] ? seccomp_filter_release+0x22b/0x2d0 [ 83.412681][ T5190] kfree+0x5b2/0x630 [ 83.412692][ T5190] ? queue_work_on+0x159/0x1d0 [ 83.412704][ T5190] seccomp_filter_release+0x22b/0x2d0 [ 83.412714][ T5190] do_exit+0x3b0/0x23c0 [ 83.412723][ T5190] ? fput_close_sync+0x11f/0x240 [ 83.412734][ T5190] ? __x64_sys_close+0x7e/0x110 [ 83.412745][ T5190] ? entry_SYSCALL_64_after_hwframe+0x77/0x7f [ 83.412755][ T5190] ? __pfx_do_exit+0x10/0x10 [ 83.412763][ T5190] ? do_raw_spin_lock+0x12b/0x2f0 [ 83.412774][ T5190] do_group_exit+0x21b/0x2d0 [ 83.412782][ T5190] ? _raw_spin_unlock_irq+0x23/0x50 [ 83.412892][ T5190] get_signal+0x1284/0x1330 [ 83.412912][ T5190] arch_do_signal_or_restart+0xbc/0x830 [ 83.412926][ T5190] ? __pfx_arch_do_signal_or_restart+0x10/0x10 [ 83.412936][ T5190] ? kmem_cache_free+0x439/0x630 [ 83.412945][ T5190] ? fput_close_sync+0x11f/0x240 [ 83.412959][ T5190] exit_to_user_mode_loop+0x86/0x480 [ 83.412971][ T5190] ? rcu_is_watching+0x15/0xb0 [ 83.412985][ T5190] do_syscall_64+0x32d/0xf80 [ 83.412995][ T5190] ? trace_irq_disable+0x3b/0x150 [ 83.413009][ T5190] ? entry_SYSCALL_64_after_hwframe+0x77/0x7f [ 83.413021][ T5190] ? clear_bhb_loop+0x40/0x90 [ 83.413034][ T5190] entry_SYSCALL_64_after_hwframe+0x77/0x7f [ 83.413045][ T5190] RIP: 0033:0x7f3f98f6b407 [ 83.413058][ T5190] Code: 48 89 fa 4c 89 df e8 38 aa 00 00 8b 93 08 03 00 00 59 5e 48 83 f8 fc 74 1a 5b c3 0f 1f 84 00 00 00 00 00 48 8b 44 24 10 0f 05 <5b> c3 0f 1f 80 00 00 00 00 83 e2 39 83 fa 08 75 de e8 23 ff ff ff [ 83.413067][ T5190] RSP: 002b:00007ffd2625d4b0 EFLAGS: 00000202 ORIG_RAX: 0000000000000003 [ 83.413089][ T5190] RAX: 0000000000000000 RBX: 00007f3f98ee1780 RCX: 00007f3f98f6b407 [ 83.413096][ T5190] RDX: 0000000000000000 RSI: 0000000000000000 RDI: 0000000000000016 [ 83.413102][ T5190] RBP: 00007ffd2626d750 R08: 0000000000000000 R09: 0000000000000000 [ 83.413108][ T5190] R10: 0000000000000000 R11: 0000000000000202 R12: 00007ffd2626d750 [ 83.413114][ T5190] R13: 0000000000000000 R14: 0000000000000000 R15: 0000000000000000 [ 83.413125][ T5190] [ 83.413128][ T5190] [ 83.552662][ T5190] Allocated by task 5323: [ 83.555373][ T5190] kasan_save_track+0x3e/0x80 [ 83.557815][ T5190] __kasan_kmalloc+0x93/0xb0 [ 83.560022][ T5190] __kmalloc_cache_noprof+0x31c/0x660 [ 83.562513][ T5190] bpf_raw_tp_link_attach+0x278/0x700 [ 83.564999][ T5190] bpf_raw_tracepoint_open+0x1b2/0x220 [ 83.567804][ T5190] __sys_bpf+0x846/0x950 [ 83.570153][ T5190] __x64_sys_bpf+0x7c/0x90 [ 83.572526][ T5190] do_syscall_64+0x14d/0xf80 [ 83.574712][ T5190] entry_SYSCALL_64_after_hwframe+0x77/0x7f [ 83.577476][ T5190] [ 83.578616][ T5190] Freed by task 15: [ 83.580597][ T5190] kasan_save_track+0x3e/0x80 [ 83.583554][ T5190] kasan_save_free_info+0x46/0x50 [ 83.586708][ T5190] __kasan_slab_free+0x5c/0x80 [ 83.589227][ T5190] kfree+0x1c1/0x630 [ 83.591015][ T5190] rcu_core+0x7cd/0x1070 [ 83.593026][ T5190] handle_softirqs+0x22a/0x870 [ 83.595321][ T5190] run_ksoftirqd+0x36/0x60 [ 83.597470][ T5190] smpboot_thread_fn+0x541/0xa50 [ 83.599917][ T5190] kthread+0x388/0x470 [ 83.601941][ T5190] ret_from_fork+0x51e/0xb90 [ 83.604338][ T5190] ret_from_fork_asm+0x1a/0x30 [ 83.607061][ T5190] [ 83.608516][ T5190] Last potentially related work creation: [ 83.611363][ T5190] kasan_save_stack+0x3e/0x60 [ 83.613646][ T5190] kasan_record_aux_stack+0xbd/0xd0 [ 83.616147][ T5190] call_rcu+0xee/0x890 [ 83.618028][ T5190] bpf_link_release+0x6b/0x80 [ 83.620641][ T5190] __fput+0x44f/0xa70 [ 83.622857][ T5190] task_work_run+0x1d9/0x270 [ 83.625372][ T5190] exit_to_user_mode_loop+0xed/0x480 [ 83.627748][ T5190] do_syscall_64+0x32d/0xf80 [ 83.629898][ T5190] entry_SYSCALL_64_after_hwframe+0x77/0x7f [ 83.632603][ T5190] [ 83.633787][ T5190] The buggy address belongs to the object at ffff888043d58200 [ 83.633787][ T5190] which belongs to the cache kmalloc-192 of size 192 [ 83.641842][ T5190] The buggy address is located 128 bytes inside of [ 83.641842][ T5190] freed 192-byte region [ffff888043d58200, ffff888043d582c0) [ 83.648193][ T5190] [ 83.649367][ T5190] The buggy address belongs to the physical page: [ 83.652365][ T5190] page: refcount:0 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0x43d58 [ 83.657314][ T5190] flags: 0x4fff00000000000(node=1|zone=1|lastcpupid=0x7ff) [ 83.660881][ T5190] page_type: f5(slab) [ 83.662783][ T5190] raw: 04fff00000000000 ffff88801ac413c0 dead000000000100 dead000000000122 [ 83.666948][ T5190] raw: 0000000000000000 0000000800100010 00000000f5000000 0000000000000000 [ 83.671663][ T5190] page dumped because: kasan: bad access detected [ 83.674744][ T5190] page_owner tracks the page as allocated [ 83.677345][ T5190] page last allocated via order 0, migratetype Unmovable, gfp_mask 0xd2cc0(GFP_KERNEL|__GFP_NOWARN|__GFP_NORETRY|__GFP_COMP|__GFP_NOMEMALLOC), pid 1, tgid 1 (swapper/0), ts 28491103113, free_ts 28483162526 [ 83.687282][ T5190] post_alloc_hook+0x231/0x280 [ 83.689521][ T5190] get_page_from_freelist+0x24dc/0x2580 [ 83.692312][ T5190] __alloc_frozen_pages_noprof+0x18d/0x380 [ 83.695553][ T5190] allocate_slab+0x77/0x660 [ 83.697950][ T5190] refill_objects+0x331/0x3c0 [ 83.700324][ T5190] __pcs_replace_empty_main+0x2f9/0x5e0 [ 83.702986][ T5190] __kmalloc_cache_noprof+0x392/0x660 [ 83.705837][ T5190] call_usermodehelper_setup+0x8e/0x270 [ 83.708886][ T5190] kobject_uevent_env+0x658/0x9e0 [ 83.711564][ T5190] kernel_add_sysfs_param+0xb1/0xe0 [ 83.714148][ T5190] param_sysfs_builtin+0x199/0x250 [ 83.716595][ T5190] param_sysfs_builtin_init+0x23/0x30 [ 83.719014][ T5190] do_one_initcall+0x250/0x8d0 [ 83.721401][ T5190] do_initcall_level+0x104/0x190 [ 83.723657][ T5190] do_initcalls+0x59/0xa0 [ 83.725776][ T5190] kernel_init_freeable+0x2a6/0x3e0 [ 83.728072][ T5190] page last free pid 30 tgid 30 stack trace: [ 83.730797][ T5190] __free_frozen_pages+0xc2b/0xdb0 [ 83.733273][ T5190] __kasan_populate_vmalloc+0x137/0x1d0 [ 83.736093][ T5190] alloc_vmap_area+0xd73/0x14b0 [ 83.738985][ T5190] __get_vm_area_node+0x1f8/0x300 [ 83.742129][ T5190] __vmalloc_node_range_noprof+0x372/0x1730 [ 83.744955][ T5190] __vmalloc_node_noprof+0xc2/0x100 [ 83.747311][ T5190] dup_task_struct+0x228/0x9a0 [ 83.749563][ T5190] copy_process+0x508/0x3cf0 [ 83.751596][ T5190] kernel_clone+0x248/0x8e0 [ 83.753683][ T5190] user_mode_thread+0x110/0x180 [ 83.756345][ T5190] call_usermodehelper_exec_work+0x5c/0x230 [ 83.759538][ T5190] process_scheduled_works+0xb02/0x1830 [ 83.762123][ T5190] worker_thread+0xa50/0xfc0 [ 83.764310][ T5190] kthread+0x388/0x470 [ 83.766150][ T5190] ret_from_fork+0x51e/0xb90 [ 83.768397][ T5190] ret_from_fork_asm+0x1a/0x30 [ 83.771287][ T5190] [ 83.772766][ T5190] Memory state around the buggy address: [ 83.775865][ T5190] ffff888043d58180: fb fb fb fb fb fb fb fb fc fc fc fc fc fc fc fc [ 83.779436][ T5190] ffff888043d58200: fa fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb [ 83.782994][ T5190] >ffff888043d58280: fb fb fb fb fb fb fb fb fc fc fc fc fc fc fc fc [ 83.786959][ T5190] ^ [ 83.789266][ T5190] ffff888043d58300: fa fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb [ 83.793249][ T5190] ffff888043d58380: fb fb fb fb fb fb fb fb fc fc fc fc fc fc fc fc [ 83.796795][ T5190] ==================================================================