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Date: Thu, 13 Jun 2019 14:56:05 -0700 From: syzbot <syzbot+182ce46596c3f2e1eb24@...kaller.appspotmail.com> To: arve@...roid.com, christian@...uner.io, devel@...verdev.osuosl.org, gregkh@...uxfoundation.org, joel@...lfernandes.org, linux-kernel@...r.kernel.org, maco@...roid.com, syzkaller-bugs@...glegroups.com, tkjos@...roid.com Subject: memory leak in binder_transaction Hello, syzbot found the following crash on: HEAD commit: d1fdb6d8 Linux 5.2-rc4 git tree: upstream console output: https://syzkaller.appspot.com/x/log.txt?x=15e5ce1ea00000 kernel config: https://syzkaller.appspot.com/x/.config?x=cb38d33cd06d8d48 dashboard link: https://syzkaller.appspot.com/bug?extid=182ce46596c3f2e1eb24 compiler: gcc (GCC) 9.0.0 20181231 (experimental) syz repro: https://syzkaller.appspot.com/x/repro.syz?x=1181703ea00000 C reproducer: https://syzkaller.appspot.com/x/repro.c?x=14e14392a00000 IMPORTANT: if you fix the bug, please add the following tag to the commit: Reported-by: syzbot+182ce46596c3f2e1eb24@...kaller.appspotmail.com -executor774" scontext=unconfined_u:system_r:insmod_t:s0-s0:c0.c1023 tcontext=unconfined_u:system_r:insmod_t:s0-s0:c0.c1023 tclass=binder permissive=1 BUG: memory leak unreferenced object 0xffff888123934800 (size 32): comm "syz-executor774", pid 7083, jiffies 4294941834 (age 7.970s) hex dump (first 32 bytes): 00 48 93 23 81 88 ff ff 00 48 93 23 81 88 ff ff .H.#.....H.#.... 02 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 ................ backtrace: [<0000000038ba7202>] kmemleak_alloc_recursive include/linux/kmemleak.h:43 [inline] [<0000000038ba7202>] slab_post_alloc_hook mm/slab.h:439 [inline] [<0000000038ba7202>] slab_alloc mm/slab.c:3326 [inline] [<0000000038ba7202>] kmem_cache_alloc_trace+0x13d/0x280 mm/slab.c:3553 [<0000000004e63839>] kmalloc include/linux/slab.h:547 [inline] [<0000000004e63839>] kzalloc include/linux/slab.h:742 [inline] [<0000000004e63839>] binder_transaction+0x28b/0x2eb0 drivers/android/binder.c:3072 [<0000000050997ec4>] binder_thread_write+0x357/0x1430 drivers/android/binder.c:3794 [<00000000ab2de227>] binder_ioctl_write_read drivers/android/binder.c:4827 [inline] [<00000000ab2de227>] binder_ioctl+0x8bc/0xbb4 drivers/android/binder.c:5004 [<000000002eec2b63>] vfs_ioctl fs/ioctl.c:46 [inline] [<000000002eec2b63>] file_ioctl fs/ioctl.c:509 [inline] [<000000002eec2b63>] do_vfs_ioctl+0x62a/0x810 fs/ioctl.c:696 [<0000000048cfc9e6>] ksys_ioctl+0x86/0xb0 fs/ioctl.c:713 [<0000000030bf392d>] __do_sys_ioctl fs/ioctl.c:720 [inline] [<0000000030bf392d>] __se_sys_ioctl fs/ioctl.c:718 [inline] [<0000000030bf392d>] __x64_sys_ioctl+0x1e/0x30 fs/ioctl.c:718 [<000000007dec438c>] do_syscall_64+0x76/0x1a0 arch/x86/entry/common.c:301 [<00000000ae043c96>] entry_SYSCALL_64_after_hwframe+0x44/0xa9 --- 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@...glegroups.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
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