On Tue, Dec 19, 2017 at 08:25:00AM -0800, syzbot wrote: > Hello, > > syzkaller hit the following crash on > 6084b576dca2e898f5c101baef151f7bfdbb606d > git://git.kernel.org/pub/scm/linux/kernel/git/next/linux-next.git/master > compiler: gcc (GCC) 7.1.1 20170620 > .config is attached > Raw console output is attached. > > Unfortunately, I don't have any reproducer for this bug yet. > > > binder: 5029:5034 got transaction to invalid handle > binder: 5029:5034 transaction failed 29201/-22, size 0-56 line 2832 > binder: undelivered TRANSACTION_ERROR: 29201 > BUG: unable to handle kernel NULL pointer dereference at (null) > IP: __hlist_del include/linux/list.h:650 [inline] > IP: hlist_del include/linux/list.h:656 [inline] > IP: binder_deferred_release drivers/android/binder.c:4869 [inline] > IP: binder_deferred_func+0x172/0x760 drivers/android/binder.c:4978 > PGD 1d6fa0067 P4D 1d6fa0067 PUD 1dd31d067 PMD 0 > Oops: 0002 [#1] SMP > Dumping ftrace buffer: > (ftrace buffer empty) > Modules linked in: > CPU: 0 PID: 3384 Comm: kworker/0:3 Not tainted 4.15.0-rc3-next-20171214+ #67 > Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS > Google 01/01/2011 > Workqueue: events binder_deferred_func > RIP: 0010:__hlist_del include/linux/list.h:650 [inline] > RIP: 0010:hlist_del include/linux/list.h:656 [inline] > RIP: 0010:binder_deferred_release drivers/android/binder.c:4869 [inline] > RIP: 0010:binder_deferred_func+0x172/0x760 drivers/android/binder.c:4978 > RSP: 0018:ffffc90002c83de8 EFLAGS: 00010246 > RAX: 0000000000000000 RBX: 0000000000000000 RCX: ffffffff82e4c35e > RDX: ffff8802156dc5c0 RSI: 000000003f65f67c RDI: 0000000000000000 > RBP: ffffc90002c83e48 R08: ffffffff82021bf5 R09: 0000000000000004 > R10: ffffc90002c83dd8 R11: 0000000000000004 R12: ffff8801de9ce458 > R13: ffff880215760160 R14: 0000000000000000 R15: ffff8801de9ce400 > FS: 0000000000000000(0000) GS:ffff88021fc00000(0000) knlGS:0000000000000000 > CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033 > CR2: 0000000000000000 CR3: 00000001d6fa1000 CR4: 00000000001406f0 > Call Trace: > process_one_work+0x288/0x7a0 kernel/workqueue.c:2112 > worker_thread+0x43/0x4d0 kernel/workqueue.c:2246 > kthread+0x149/0x170 kernel/kthread.c:238 > ret_from_fork+0x24/0x30 arch/x86/entry/entry_64.S:524 > Code: 24 58 02 00 00 0f 85 8b 05 00 00 e8 59 87 29 ff 31 f6 48 c7 c7 80 bd > 15 83 e8 4b a1 5a 00 49 8b 5c 24 a8 4d 8b 74 24 b0 48 85 db <49> 89 1e 74 09 > e8 34 87 29 ff 4c 89 73 08 e8 2b 87 29 ff 48 b8 > RIP: __hlist_del include/linux/list.h:650 [inline] RSP: ffffc90002c83de8 > RIP: hlist_del include/linux/list.h:656 [inline] RSP: ffffc90002c83de8 > RIP: binder_deferred_release drivers/android/binder.c:4869 [inline] RSP: > ffffc90002c83de8 > RIP: binder_deferred_func+0x172/0x760 drivers/android/binder.c:4978 RSP: > ffffc90002c83de8 > CR2: 0000000000000000 > ---[ end trace 043d80c4b2730aca ]--- > Kernel panic - not syncing: Fatal exception > Dumping ftrace buffer: > (ftrace buffer empty) > Kernel Offset: disabled > Rebooting in 86400 seconds.. Invalidating this bug since it hasn't been seen again, and it was reported while KASAN was accidentally disabled in the syzbot kconfig due to a change to the kconfig menus in linux-next (so this crash was possibly caused by slab corruption elsewhere). #syz invalid _______________________________________________ devel mailing list devel@xxxxxxxxxxxxxxxxxxxxxx http://driverdev.linuxdriverproject.org/mailman/listinfo/driverdev-devel
