Hello, syzbot found the following issue on: HEAD commit: 7a68065eb9cd Merge tag 'gpio-fixes-for-v5.19-rc2' of git:/.. git tree: upstream console output: https://syzkaller.appspot.com/x/log.txt?x=1432d953f00000 kernel config: https://syzkaller.appspot.com/x/.config?x=b8e07e4ed17ee546 dashboard link: https://syzkaller.appspot.com/bug?extid=9f160a43b2cf201cbe65 compiler: gcc (Debian 10.2.1-6) 10.2.1 20210110, GNU ld (GNU Binutils for Debian) 2.35.2 syz repro: https://syzkaller.appspot.com/x/repro.syz?x=1297ba43f00000 C reproducer: https://syzkaller.appspot.com/x/repro.c?x=14bf34a7f00000 IMPORTANT: if you fix the issue, please add the following tag to the commit: Reported-by: syzbot+9f160a43b2cf201cbe65@xxxxxxxxxxxxxxxxxxxxxxxxx BUG: memory leak unreferenced object 0xffff8881016dfa00 (size 256): comm "syz-executor201", pid 3662, jiffies 4294969093 (age 12.970s) hex dump (first 32 bytes): 00 90 da 0d 81 88 ff ff 00 00 00 00 01 00 00 00 ................ 01 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 ................ backtrace: [<ffffffff816fe96b>] kmalloc include/linux/slab.h:605 [inline] [<ffffffff816fe96b>] kzalloc include/linux/slab.h:733 [inline] [<ffffffff816fe96b>] __register_sysctl_table+0x7b/0x7f0 fs/proc/proc_sysctl.c:1344 [<ffffffff82219a5a>] setup_mq_sysctls+0x12a/0x1c0 ipc/mq_sysctl.c:112 [<ffffffff822196d2>] create_ipc_ns ipc/namespace.c:63 [inline] [<ffffffff822196d2>] copy_ipcs+0x292/0x390 ipc/namespace.c:91 [<ffffffff8127de6c>] create_new_namespaces+0xdc/0x4f0 kernel/nsproxy.c:90 [<ffffffff8127e88b>] unshare_nsproxy_namespaces+0x9b/0x120 kernel/nsproxy.c:226 [<ffffffff8123f92e>] ksys_unshare+0x2fe/0x600 kernel/fork.c:3165 [<ffffffff8123fc42>] __do_sys_unshare kernel/fork.c:3236 [inline] [<ffffffff8123fc42>] __se_sys_unshare kernel/fork.c:3234 [inline] [<ffffffff8123fc42>] __x64_sys_unshare+0x12/0x20 kernel/fork.c:3234 [<ffffffff845abc55>] do_syscall_x64 arch/x86/entry/common.c:50 [inline] [<ffffffff845abc55>] do_syscall_64+0x35/0xb0 arch/x86/entry/common.c:80 [<ffffffff8460006a>] entry_SYSCALL_64_after_hwframe+0x46/0xb0 BUG: memory leak unreferenced object 0xffff88810edf7b00 (size 256): comm "syz-executor201", pid 3662, jiffies 4294969093 (age 12.970s) hex dump (first 32 bytes): 78 7b df 0e 81 88 ff ff 00 00 00 00 01 00 00 00 x{.............. 01 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 ................ backtrace: [<ffffffff816fee99>] kmalloc include/linux/slab.h:605 [inline] [<ffffffff816fee99>] kzalloc include/linux/slab.h:733 [inline] [<ffffffff816fee99>] new_dir fs/proc/proc_sysctl.c:978 [inline] [<ffffffff816fee99>] get_subdir fs/proc/proc_sysctl.c:1022 [inline] [<ffffffff816fee99>] __register_sysctl_table+0x5a9/0x7f0 fs/proc/proc_sysctl.c:1373 [<ffffffff82219a5a>] setup_mq_sysctls+0x12a/0x1c0 ipc/mq_sysctl.c:112 [<ffffffff822196d2>] create_ipc_ns ipc/namespace.c:63 [inline] [<ffffffff822196d2>] copy_ipcs+0x292/0x390 ipc/namespace.c:91 [<ffffffff8127de6c>] create_new_namespaces+0xdc/0x4f0 kernel/nsproxy.c:90 [<ffffffff8127e88b>] unshare_nsproxy_namespaces+0x9b/0x120 kernel/nsproxy.c:226 [<ffffffff8123f92e>] ksys_unshare+0x2fe/0x600 kernel/fork.c:3165 [<ffffffff8123fc42>] __do_sys_unshare kernel/fork.c:3236 [inline] [<ffffffff8123fc42>] __se_sys_unshare kernel/fork.c:3234 [inline] [<ffffffff8123fc42>] __x64_sys_unshare+0x12/0x20 kernel/fork.c:3234 [<ffffffff845abc55>] do_syscall_x64 arch/x86/entry/common.c:50 [inline] [<ffffffff845abc55>] do_syscall_64+0x35/0xb0 arch/x86/entry/common.c:80 [<ffffffff8460006a>] entry_SYSCALL_64_after_hwframe+0x46/0xb0 BUG: memory leak unreferenced object 0xffff888101926f00 (size 256): comm "syz-executor201", pid 3662, jiffies 4294969093 (age 12.970s) hex dump (first 32 bytes): 78 6f 92 01 81 88 ff ff 00 00 00 00 01 00 00 00 xo.............. 01 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 ................ backtrace: [<ffffffff816fee99>] kmalloc include/linux/slab.h:605 [inline] [<ffffffff816fee99>] kzalloc include/linux/slab.h:733 [inline] [<ffffffff816fee99>] new_dir fs/proc/proc_sysctl.c:978 [inline] [<ffffffff816fee99>] get_subdir fs/proc/proc_sysctl.c:1022 [inline] [<ffffffff816fee99>] __register_sysctl_table+0x5a9/0x7f0 fs/proc/proc_sysctl.c:1373 [<ffffffff82219a5a>] setup_mq_sysctls+0x12a/0x1c0 ipc/mq_sysctl.c:112 [<ffffffff822196d2>] create_ipc_ns ipc/namespace.c:63 [inline] [<ffffffff822196d2>] copy_ipcs+0x292/0x390 ipc/namespace.c:91 [<ffffffff8127de6c>] create_new_namespaces+0xdc/0x4f0 kernel/nsproxy.c:90 [<ffffffff8127e88b>] unshare_nsproxy_namespaces+0x9b/0x120 kernel/nsproxy.c:226 [<ffffffff8123f92e>] ksys_unshare+0x2fe/0x600 kernel/fork.c:3165 [<ffffffff8123fc42>] __do_sys_unshare kernel/fork.c:3236 [inline] [<ffffffff8123fc42>] __se_sys_unshare kernel/fork.c:3234 [inline] [<ffffffff8123fc42>] __x64_sys_unshare+0x12/0x20 kernel/fork.c:3234 [<ffffffff845abc55>] do_syscall_x64 arch/x86/entry/common.c:50 [inline] [<ffffffff845abc55>] do_syscall_64+0x35/0xb0 arch/x86/entry/common.c:80 [<ffffffff8460006a>] entry_SYSCALL_64_after_hwframe+0x46/0xb0 write to /proc/sys/kernel/hung_task_check_interval_secs failed: No such file or directory write to /proc/sys/kernel/softlockup_all_cpu_backtrace failed: No such file or directory write to /proc/sys/kernel/hung_task_check_interval_secs failed: No such file or directory write to /proc/sys/kernel/softlockup_all_cpu_backtrace failed: No such file or directory --- 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@xxxxxxxxxxxxxxxx. syzbot will keep track of this issue. See: https://goo.gl/tpsmEJ#status for how to communicate with syzbot. syzbot can test patches for this issue, for details see: https://goo.gl/tpsmEJ#testing-patches
