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AJvYcCVrwfi3cgH6RQYto+N3cFAnn2ypMpNNy6bjaWfBnnnzh8qPcXbl5KZRbsFEwNMbEbcffqLmCGkXtF6+20OyJVVKe5auBldShqOULXMeL/CXedi8 X-Gm-Message-State: AOJu0YyTElN7PvfQRkbglIWwuzWt4/q35Hg+9QxgB+fajqiDA1cu8Rqd T6CWX9KBxhCDlgH9kTdMAdn3imuvajrkO1V4+oRKi3a7/JxkQRfReqi0aJZX10fNqt8bdcTaiqN IDp+eNGZM3cBCumyHb+y0LJ0gGwiiO+aw9mClT5aTltQALQhQbiWX1XM= X-Google-Smtp-Source: AGHT+IGkoJaqQw6OyIuK4kTeedHKxq+oWI5MGemm8fdASR7OVIWIZjYXM/CWhUrXKSbIrVvUPVFSDNR+43CVQWRLcQImAJYsq/lj Precedence: bulk X-Mailing-List: linux-trace-kernel@vger.kernel.org List-Id: List-Subscribe: List-Unsubscribe: MIME-Version: 1.0 X-Received: by 2002:a05:6602:340b:b0:81f:7d7d:89fd with SMTP id ca18e2360f4ac-8225ecd9524mr19521639f.1.1723321036576; Sat, 10 Aug 2024 13:17:16 -0700 (PDT) Date: Sat, 10 Aug 2024 13:17:16 -0700 X-Google-Appengine-App-Id: s~syzkaller X-Google-Appengine-App-Id-Alias: syzkaller Message-ID: <000000000000382d39061f59f2dd@google.com> Subject: [syzbot] [perf?] KASAN: slab-use-after-free Read in __uprobe_unregister From: syzbot To: acme@kernel.org, adrian.hunter@intel.com, alexander.shishkin@linux.intel.com, irogers@google.com, jolsa@kernel.org, kan.liang@linux.intel.com, linux-kernel@vger.kernel.org, linux-perf-users@vger.kernel.org, linux-trace-kernel@vger.kernel.org, mark.rutland@arm.com, mhiramat@kernel.org, mingo@redhat.com, namhyung@kernel.org, oleg@redhat.com, peterz@infradead.org, syzkaller-bugs@googlegroups.com Content-Type: text/plain; charset="UTF-8" Hello, syzbot found the following issue on: HEAD commit: 6a0e38264012 Merge tag 'for-6.11-rc2-tag' of git://git.ker.. git tree: upstream console output: https://syzkaller.appspot.com/x/log.txt?x=13d4fc91980000 kernel config: https://syzkaller.appspot.com/x/.config?x=505ed4a1dd93463a dashboard link: https://syzkaller.appspot.com/bug?extid=f7a1c2c2711e4a780f19 compiler: gcc (Debian 12.2.0-14) 12.2.0, GNU ld (GNU Binutils for Debian) 2.40 syz repro: https://syzkaller.appspot.com/x/repro.syz?x=15fd9755980000 C reproducer: https://syzkaller.appspot.com/x/repro.c?x=1546c4e5980000 Downloadable assets: disk image (non-bootable): https://storage.googleapis.com/syzbot-assets/7bc7510fe41f/non_bootable_disk-6a0e3826.raw.xz vmlinux: https://storage.googleapis.com/syzbot-assets/dd9ba9302e4d/vmlinux-6a0e3826.xz kernel image: https://storage.googleapis.com/syzbot-assets/aa3ef19fbf4e/bzImage-6a0e3826.xz IMPORTANT: if you fix the issue, please add the following tag to the commit: Reported-by: syzbot+f7a1c2c2711e4a780f19@syzkaller.appspotmail.com R10: 0000000000000001 R11: 0000000000000246 R12: 00007f4aa48c4618 R13: 00007ffc0345d258 R14: 0000000000000001 R15: 0000000000000001 ================================================================== BUG: KASAN: slab-use-after-free in consumer_del kernel/events/uprobes.c:772 [inline] BUG: KASAN: slab-use-after-free in __uprobe_unregister+0x210/0x260 kernel/events/uprobes.c:1087 Read of size 8 at addr ffff888025a498b8 by task syz-executor380/5333 CPU: 2 UID: 0 PID: 5333 Comm: syz-executor380 Not tainted 6.11.0-rc2-syzkaller-00027-g6a0e38264012 #0 Hardware name: QEMU Standard PC (Q35 + ICH9, 2009), BIOS 1.16.3-debian-1.16.3-2~bpo12+1 04/01/2014 Call Trace: __dump_stack lib/dump_stack.c:93 [inline] dump_stack_lvl+0x116/0x1f0 lib/dump_stack.c:119 print_address_description mm/kasan/report.c:377 [inline] print_report+0xc3/0x620 mm/kasan/report.c:488 kasan_report+0xd9/0x110 mm/kasan/report.c:601 consumer_del kernel/events/uprobes.c:772 [inline] __uprobe_unregister+0x210/0x260 kernel/events/uprobes.c:1087 uprobe_unregister+0x45/0x70 kernel/events/uprobes.c:1111 bpf_uprobe_unregister+0xfb/0x1d0 kernel/trace/bpf_trace.c:3187 bpf_uprobe_multi_link_release+0x6d/0x180 kernel/trace/bpf_trace.c:3197 bpf_link_free+0x12c/0x2b0 kernel/bpf/syscall.c:3067 bpf_link_put_direct kernel/bpf/syscall.c:3107 [inline] bpf_link_release+0x63/0x80 kernel/bpf/syscall.c:3114 __fput+0x408/0xbb0 fs/file_table.c:422 task_work_run+0x14e/0x250 kernel/task_work.c:228 exit_task_work include/linux/task_work.h:40 [inline] do_exit+0xaa3/0x2bb0 kernel/exit.c:882 do_group_exit+0xd3/0x2a0 kernel/exit.c:1031 __do_sys_exit_group kernel/exit.c:1042 [inline] __se_sys_exit_group kernel/exit.c:1040 [inline] __x64_sys_exit_group+0x3e/0x50 kernel/exit.c:1040 x64_sys_call+0x14a9/0x16a0 arch/x86/include/generated/asm/syscalls_64.h:232 do_syscall_x64 arch/x86/entry/common.c:52 [inline] do_syscall_64+0xcd/0x250 arch/x86/entry/common.c:83 entry_SYSCALL_64_after_hwframe+0x77/0x7f RIP: 0033:0x7f4aa48570e9 Code: Unable to access opcode bytes at 0x7f4aa48570bf. RSP: 002b:00007ffc0345d048 EFLAGS: 00000246 ORIG_RAX: 00000000000000e7 RAX: ffffffffffffffda RBX: 0000000000000000 RCX: 00007f4aa48570e9 RDX: 000000000000003c RSI: 00000000000000e7 RDI: 0000000000000000 RBP: 00007f4aa48ca350 R08: ffffffffffffffb8 R09: 00007f4aa48c0038 R10: 0000000000000001 R11: 0000000000000246 R12: 00007f4aa48ca350 R13: 0000000000000000 R14: 00007f4aa48cada0 R15: 00007f4aa48211a0 Allocated by task 5333: kasan_save_stack+0x33/0x60 mm/kasan/common.c:47 kasan_save_track+0x14/0x30 mm/kasan/common.c:68 poison_kmalloc_redzone mm/kasan/common.c:370 [inline] __kasan_kmalloc+0xaa/0xb0 mm/kasan/common.c:387 kasan_kmalloc include/linux/kasan.h:211 [inline] __do_kmalloc_node mm/slub.c:4158 [inline] __kmalloc_node_noprof+0x211/0x430 mm/slub.c:4164 __kvmalloc_node_noprof+0x9d/0x1a0 mm/util.c:650 kvmalloc_array_node_noprof include/linux/slab.h:833 [inline] bpf_uprobe_multi_link_attach+0x45d/0xe20 kernel/trace/bpf_trace.c:3439 link_create kernel/bpf/syscall.c:5319 [inline] __sys_bpf+0x41ff/0x4a20 kernel/bpf/syscall.c:5780 __do_sys_bpf kernel/bpf/syscall.c:5817 [inline] __se_sys_bpf kernel/bpf/syscall.c:5815 [inline] __x64_sys_bpf+0x78/0xc0 kernel/bpf/syscall.c:5815 do_syscall_x64 arch/x86/entry/common.c:52 [inline] do_syscall_64+0xcd/0x250 arch/x86/entry/common.c:83 entry_SYSCALL_64_after_hwframe+0x77/0x7f Freed by task 5333: kasan_save_stack+0x33/0x60 mm/kasan/common.c:47 kasan_save_track+0x14/0x30 mm/kasan/common.c:68 kasan_save_free_info+0x3b/0x60 mm/kasan/generic.c:579 poison_slab_object+0xf7/0x160 mm/kasan/common.c:240 __kasan_slab_free+0x32/0x50 mm/kasan/common.c:256 kasan_slab_free include/linux/kasan.h:184 [inline] slab_free_hook mm/slub.c:2252 [inline] slab_free mm/slub.c:4473 [inline] kfree+0x12a/0x3b0 mm/slub.c:4594 kvfree+0x47/0x50 mm/util.c:696 bpf_uprobe_multi_link_attach+0xaae/0xe20 kernel/trace/bpf_trace.c:3500 link_create kernel/bpf/syscall.c:5319 [inline] __sys_bpf+0x41ff/0x4a20 kernel/bpf/syscall.c:5780 __do_sys_bpf kernel/bpf/syscall.c:5817 [inline] __se_sys_bpf kernel/bpf/syscall.c:5815 [inline] __x64_sys_bpf+0x78/0xc0 kernel/bpf/syscall.c:5815 do_syscall_x64 arch/x86/entry/common.c:52 [inline] do_syscall_64+0xcd/0x250 arch/x86/entry/common.c:83 entry_SYSCALL_64_after_hwframe+0x77/0x7f The buggy address belongs to the object at ffff888025a49880 which belongs to the cache kmalloc-64 of size 64 The buggy address is located 56 bytes inside of freed 64-byte region [ffff888025a49880, ffff888025a498c0) The buggy address belongs to the physical page: page: refcount:1 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0x25a49 flags: 0xfff00000000000(node=0|zone=1|lastcpupid=0x7ff) page_type: 0xfdffffff(slab) raw: 00fff00000000000 ffff8880158428c0 dead000000000100 dead000000000122 raw: 0000000000000000 0000000080200020 00000001fdffffff 0000000000000000 page dumped because: kasan: bad access detected page_owner tracks the page as allocated page last allocated via order 0, migratetype Unmovable, gfp_mask 0x52cc0(GFP_KERNEL|__GFP_NOWARN|__GFP_NORETRY|__GFP_COMP), pid 11, tgid 11 (kworker/u32:0), ts 16060739565, free_ts 16025939467 set_page_owner include/linux/page_owner.h:32 [inline] post_alloc_hook+0x2d1/0x350 mm/page_alloc.c:1493 prep_new_page mm/page_alloc.c:1501 [inline] get_page_from_freelist+0x1351/0x2e50 mm/page_alloc.c:3442 __alloc_pages_noprof+0x22b/0x2460 mm/page_alloc.c:4700 __alloc_pages_node_noprof include/linux/gfp.h:269 [inline] alloc_pages_node_noprof include/linux/gfp.h:296 [inline] alloc_slab_page+0x4e/0xf0 mm/slub.c:2321 allocate_slab mm/slub.c:2484 [inline] new_slab+0x84/0x260 mm/slub.c:2537 ___slab_alloc+0xdac/0x1870 mm/slub.c:3723 __slab_alloc.constprop.0+0x56/0xb0 mm/slub.c:3813 __slab_alloc_node mm/slub.c:3866 [inline] slab_alloc_node mm/slub.c:4025 [inline] __kmalloc_cache_node_noprof+0xf1/0x350 mm/slub.c:4197 kmalloc_node_noprof include/linux/slab.h:704 [inline] __get_vm_area_node+0xe1/0x2d0 mm/vmalloc.c:3109 __vmalloc_node_range_noprof+0x276/0x1520 mm/vmalloc.c:3801 alloc_thread_stack_node kernel/fork.c:313 [inline] dup_task_struct kernel/fork.c:1113 [inline] copy_process+0x2f3b/0x8de0 kernel/fork.c:2204 kernel_clone+0xfd/0x980 kernel/fork.c:2781 user_mode_thread+0xb4/0xf0 kernel/fork.c:2859 call_usermodehelper_exec_work kernel/umh.c:172 [inline] call_usermodehelper_exec_work+0xcb/0x170 kernel/umh.c:158 process_one_work+0x9c5/0x1b40 kernel/workqueue.c:3231 process_scheduled_works kernel/workqueue.c:3312 [inline] worker_thread+0x6c8/0xf20 kernel/workqueue.c:3390 page last free pid 986 tgid 986 stack trace: reset_page_owner include/linux/page_owner.h:25 [inline] free_pages_prepare mm/page_alloc.c:1094 [inline] free_unref_page+0x64a/0xe40 mm/page_alloc.c:2612 vfree+0x181/0x7a0 mm/vmalloc.c:3364 delayed_vfree_work+0x56/0x70 mm/vmalloc.c:3285 process_one_work+0x9c5/0x1b40 kernel/workqueue.c:3231 process_scheduled_works kernel/workqueue.c:3312 [inline] worker_thread+0x6c8/0xf20 kernel/workqueue.c:3390 kthread+0x2c1/0x3a0 kernel/kthread.c:389 ret_from_fork+0x45/0x80 arch/x86/kernel/process.c:147 ret_from_fork_asm+0x1a/0x30 arch/x86/entry/entry_64.S:244 Memory state around the buggy address: ffff888025a49780: fa fb fb fb fb fb fb fb fc fc fc fc fc fc fc fc ffff888025a49800: 00 00 00 00 00 00 fc fc fc fc fc fc fc fc fc fc >ffff888025a49880: fa fb fb fb fb fb fb fb fc fc fc fc fc fc fc fc ^ ffff888025a49900: fa fb fb fb fb fb fb fb fc fc fc fc fc fc fc fc ffff888025a49980: 00 00 00 00 00 00 00 00 fc fc fc fc fc fc fc fc ================================================================== --- This report is generated by a bot. It may contain errors. See https://goo.gl/tpsmEJ for more information about syzbot. syzbot engineers can be reached at syzkaller@googlegroups.com. syzbot will keep track of this issue. See: https://goo.gl/tpsmEJ#status for how to communicate with syzbot. If the report is already addressed, let syzbot know by replying with: #syz fix: exact-commit-title If you want syzbot to run the reproducer, reply with: #syz test: git://repo/address.git branch-or-commit-hash If you attach or paste a git patch, syzbot will apply it before testing. If you want to overwrite report's subsystems, reply with: #syz set subsystems: new-subsystem (See the list of subsystem names on the web dashboard) If the report is a duplicate of another one, reply with: #syz dup: exact-subject-of-another-report If you want to undo deduplication, reply with: #syz undup