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Wed, 29 May 2019 09:28:06 -0700 (PDT) Date: Wed, 29 May 2019 09:28:06 -0700 X-Google-Appengine-App-Id: s~syzkaller X-Google-Appengine-App-Id-Alias: syzkaller Message-ID: <00000000000026f98d058a0944ed@google.com> Subject: memory leak in kobject_set_name_vargs From: syzbot To: gregkh@linuxfoundation.org, linux-kernel@vger.kernel.org, rafael@kernel.org, syzkaller-bugs@googlegroups.com Content-Type: text/plain; charset="UTF-8"; format=flowed; delsp=yes Sender: linux-kernel-owner@vger.kernel.org Precedence: bulk List-ID: X-Mailing-List: linux-kernel@vger.kernel.org Hello, syzbot found the following crash on: HEAD commit: 9fb67d64 Merge tag 'pinctrl-v5.2-2' of git://git.kernel.or.. git tree: upstream console output: https://syzkaller.appspot.com/x/log.txt?x=11929a5ca00000 kernel config: https://syzkaller.appspot.com/x/.config?x=64479170dcaf0e11 dashboard link: https://syzkaller.appspot.com/bug?extid=7fddca22578bc67c3fe4 compiler: gcc (GCC) 9.0.0 20181231 (experimental) syz repro: https://syzkaller.appspot.com/x/repro.syz?x=1260e44aa00000 C reproducer: https://syzkaller.appspot.com/x/repro.c?x=13014582a00000 IMPORTANT: if you fix the bug, please add the following tag to the commit: Reported-by: syzbot+7fddca22578bc67c3fe4@syzkaller.appspotmail.com ffffffffda RBX: 0000000000000003 RCX: 00000000004426c9 BUG: memory leak unreferenced object 0xffff88811d8a84e0 (size 32): comm "syz-executor542", pid 6993, jiffies 4294943975 (age 8.330s) hex dump (first 32 bytes): 70 68 79 33 00 74 61 73 6b 2f 36 39 39 33 00 de phy3.task/6993.. 33 33 ff aa aa 28 00 00 00 00 00 00 00 00 00 00 33...(.......... backtrace: [<000000007298dac3>] kmemleak_alloc_recursive include/linux/kmemleak.h:55 [inline] [<000000007298dac3>] slab_post_alloc_hook mm/slab.h:439 [inline] [<000000007298dac3>] slab_alloc mm/slab.c:3326 [inline] [<000000007298dac3>] __do_kmalloc mm/slab.c:3658 [inline] [<000000007298dac3>] __kmalloc_track_caller+0x15d/0x2c0 mm/slab.c:3675 [<000000002d35f1ca>] kvasprintf+0x6d/0xe0 lib/kasprintf.c:25 [<00000000a242e8c2>] kvasprintf_const+0x96/0xe0 lib/kasprintf.c:49 [<000000009923ecab>] kobject_set_name_vargs+0x40/0xe0 lib/kobject.c:289 [<0000000031da656f>] dev_set_name+0x63/0x90 drivers/base/core.c:1915 [<00000000cb933060>] wiphy_new_nm+0x2d9/0x820 net/wireless/core.c:470 [<00000000fe076c30>] ieee80211_alloc_hw_nm+0x158/0x770 net/mac80211/main.c:551 [<000000002d397aa1>] mac80211_hwsim_new_radio+0xad/0x1150 drivers/net/wireless/mac80211_hwsim.c:2655 [<00000000de4d0f50>] hwsim_new_radio_nl+0x369/0x50a drivers/net/wireless/mac80211_hwsim.c:3490 [<00000000c2565b18>] genl_family_rcv_msg+0x2ab/0x5b0 net/netlink/genetlink.c:629 [<00000000dbd164a1>] genl_rcv_msg+0x54/0x9c net/netlink/genetlink.c:654 [<00000000cfe4f152>] netlink_rcv_skb+0x61/0x170 net/netlink/af_netlink.c:2486 [<000000001803b485>] genl_rcv+0x29/0x40 net/netlink/genetlink.c:665 [<000000008f236552>] netlink_unicast_kernel net/netlink/af_netlink.c:1311 [inline] [<000000008f236552>] netlink_unicast+0x1ec/0x2d0 net/netlink/af_netlink.c:1337 [<0000000030d22a07>] netlink_sendmsg+0x26a/0x480 net/netlink/af_netlink.c:1926 [<00000000b09b44f1>] sock_sendmsg_nosec net/socket.c:652 [inline] [<00000000b09b44f1>] sock_sendmsg+0x54/0x70 net/socket.c:671 --- This bug 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 bug report. See: https://goo.gl/tpsmEJ#status for how to communicate with syzbot. syzbot can test patches for this bug, for details see: https://goo.gl/tpsmEJ#testing-patches