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charset="us-ascii"; Format="flowed"; DelSp="yes" Errors-To: driverdev-devel-bounces@linuxdriverproject.org Sender: "devel" X-getmail-retrieved-from-mailbox: INBOX X-Mailing-List: linux-kernel@vger.kernel.org List-ID: Hello, syzbot hit the following crash on upstream commit f2d285669aae656dfeafa0bf25e86bbbc5d22329 (Tue Apr 3 17:45:39 2018 +0000) Merge tag 'pm-4.17-rc1' of git://git.kernel.org/pub/scm/linux/kernel/git/rafael/linux-pm syzbot dashboard link: https://syzkaller.appspot.com/bug?extid=0cf1f1aa154f56ff2e8d So far this crash happened 4 times on upstream. C reproducer: https://syzkaller.appspot.com/x/repro.c?id=4827186146050048 syzkaller reproducer: https://syzkaller.appspot.com/x/repro.syz?id=6025869373997056 Raw console output: https://syzkaller.appspot.com/x/log.txt?id=4772918563176448 Kernel config: https://syzkaller.appspot.com/x/.config?id=686016073509112605 compiler: gcc (GCC) 7.1.1 20170620 IMPORTANT: if you fix the bug, please add the following tag to the commit: Reported-by: syzbot+0cf1f1aa154f56ff2e8d@syzkaller.appspotmail.com It will help syzbot understand when the bug is fixed. See footer for details. If you forward the report, please keep this part and the footer. binder: 4616:4618 transaction failed 29189/-3, size 0-0 line 2963 binder: release 4616:4618 transaction 114 in, still active binder: send failed reply for transaction 114 to 4616:4618 binder: 4620:4621 ioctl 400448c8 20000200 returned -22 ================================================================== BUG: KASAN: use-after-free in __list_del_entry_valid+0x144/0x150 lib/list_debug.c:54 Read of size 8 at addr ffff8801d39a4210 by task kworker/1:2/1891 CPU: 1 PID: 1891 Comm: kworker/1:2 Not tainted 4.16.0+ #378 binder: release 4620:4621 transaction 118 out, still active Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011 Workqueue: events binder_deferred_func Call Trace: __dump_stack lib/dump_stack.c:17 [inline] dump_stack+0x1a7/0x27d lib/dump_stack.c:53 binder: release 4620:4621 transaction 117 in, still active print_address_description+0x73/0x250 mm/kasan/report.c:256 binder: undelivered TRANSACTION_COMPLETE kasan_report_error mm/kasan/report.c:354 [inline] kasan_report+0x23c/0x360 mm/kasan/report.c:412 __asan_report_load8_noabort+0x14/0x20 mm/kasan/report.c:433 binder: BINDER_SET_CONTEXT_MGR already set __list_del_entry_valid+0x144/0x150 lib/list_debug.c:54 binder: 4620:4622 ioctl 40046207 0 returned -16 __list_del_entry include/linux/list.h:117 [inline] list_del_init include/linux/list.h:159 [inline] binder_dequeue_work_head_ilocked drivers/android/binder.c:893 [inline] binder_dequeue_work_head drivers/android/binder.c:913 [inline] binder_release_work+0x163/0x4b0 drivers/android/binder.c:4191 binder: 4620:4621 ioctl c0306201 20004000 returned -14 binder: 4620:4621 ioctl 400448c8 20000200 returned -22 binder_thread_release+0x4e1/0x730 drivers/android/binder.c:4396 binder_alloc: binder_alloc_mmap_handler: 4620 2000c000-2000e000 already mapped failed -16 binder_deferred_release drivers/android/binder.c:4939 [inline] binder_deferred_func+0x4f4/0x1350 drivers/android/binder.c:5022 binder_alloc: 4620: binder_alloc_buf, no vma binder: 4620:4623 transaction failed 29189/-3, size 0-0 line 2963 process_one_work+0xc97/0x1c40 kernel/workqueue.c:2113 binder_alloc: 4620: binder_alloc_buf, no vma binder: 4620:4621 transaction failed 29189/-3, size 0-0 line 2963 binder: release 4620:4622 transaction 118 in, still active binder: release 4620:4622 transaction 117 out, still active worker_thread+0x1c3/0x1380 kernel/workqueue.c:2247 binder: send failed reply for transaction 118, target dead binder: send failed reply for transaction 117, target dead binder: BINDER_SET_CONTEXT_MGR already set binder: 4624:4625 ioctl 40046207 0 returned -16 kthread+0x33c/0x400 kernel/kthread.c:238 binder: 4624:4625 ioctl 400448c8 20000200 returned -22 ret_from_fork+0x3a/0x50 arch/x86/entry/entry_64.S:411 binder_alloc: 4620: binder_alloc_buf, no vma Allocated by task 4618: save_stack+0x43/0xd0 mm/kasan/kasan.c:447 set_track mm/kasan/kasan.c:459 [inline] kasan_kmalloc+0xad/0xe0 mm/kasan/kasan.c:552 binder: 4624:4626 transaction failed 29189/-3, size 0-0 line 2963 kmem_cache_alloc_trace+0x136/0x740 mm/slab.c:3608 kmalloc include/linux/slab.h:512 [inline] kzalloc include/linux/slab.h:701 [inline] binder_transaction+0x13d2/0x8200 drivers/android/binder.c:2900 binder_thread_write+0xcf1/0x38b0 drivers/android/binder.c:3513 binder_ioctl_write_read.isra.39+0x261/0xcb0 drivers/android/binder.c:4451 binder_ioctl+0xb72/0x1417 drivers/android/binder.c:4591 binder: undelivered TRANSACTION_ERROR: 29189 vfs_ioctl fs/ioctl.c:46 [inline] do_vfs_ioctl+0x1b1/0x1520 fs/ioctl.c:686 ksys_ioctl+0x94/0xb0 fs/ioctl.c:701 SYSC_ioctl fs/ioctl.c:708 [inline] SyS_ioctl+0x24/0x30 fs/ioctl.c:706 do_syscall_64+0x281/0x940 arch/x86/entry/common.c:287 entry_SYSCALL_64_after_hwframe+0x42/0xb7 binder: 4624:4626 ioctl c0306201 20004000 returned -14 Freed by task 1891: save_stack+0x43/0xd0 mm/kasan/kasan.c:447 set_track mm/kasan/kasan.c:459 [inline] __kasan_slab_free+0x11a/0x170 mm/kasan/kasan.c:520 kasan_slab_free+0xe/0x10 mm/kasan/kasan.c:527 __cache_free mm/slab.c:3486 [inline] kfree+0xd9/0x260 mm/slab.c:3801 binder: BINDER_SET_CONTEXT_MGR already set binder_free_transaction+0x6a/0xa0 drivers/android/binder.c:1966 binder_send_failed_reply+0x1c9/0x380 drivers/android/binder.c:2005 binder_thread_release+0x4cc/0x730 drivers/android/binder.c:4395 binder_deferred_release drivers/android/binder.c:4939 [inline] binder_deferred_func+0x4f4/0x1350 drivers/android/binder.c:5022 process_one_work+0xc97/0x1c40 kernel/workqueue.c:2113 worker_thread+0x1c3/0x1380 kernel/workqueue.c:2247 kthread+0x33c/0x400 kernel/kthread.c:238 binder: 4624:4627 ioctl 40046207 0 returned -16 ret_from_fork+0x3a/0x50 arch/x86/entry/entry_64.S:411 The buggy address belongs to the object at ffff8801d39a4200 which belongs to the cache kmalloc-192 of size 192 The buggy address is located 16 bytes inside of 192-byte region [ffff8801d39a4200, ffff8801d39a42c0) The buggy address belongs to the page: page:ffffea00074e6900 count:1 mapcount:0 mapping:ffff8801d39a4000 index:0x0 binder: 4624:4626 ioctl 400448c8 20000200 returned -22 flags: 0x2fffc0000000100(slab) raw: 02fffc0000000100 ffff8801d39a4000 0000000000000000 0000000100000010 raw: ffffea000738fbe0 ffffea00074e6a60 ffff8801dac00040 0000000000000000 page dumped because: kasan: bad access detected binder_alloc: binder_alloc_mmap_handler: 4624 2000c000-2000e000 already mapped failed -16 Memory state around the buggy address: ffff8801d39a4100: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 ffff8801d39a4180: 00 00 00 00 00 00 00 fc fc fc fc fc fc fc fc fc > ffff8801d39a4200: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb ^ ffff8801d39a4280: fb fb fb fb fb fb fb fb fc fc fc fc fc fc fc fc binder_alloc: 4620: binder_alloc_buf, no vma ffff8801d39a4300: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 ================================================================== --- This bug is generated by a dumb bot. It may contain errors. See https://goo.gl/tpsmEJ for details. Direct all questions to syzkaller@googlegroups.com. syzbot will keep track of this bug report. If you forgot to add the Reported-by tag, once the fix for this bug is merged into any tree, please reply to this email with: #syz fix: exact-commit-title If you want to test a patch for this bug, please reply with: #syz test: git://repo/address.git branch and provide the patch inline or as an attachment. To mark this as a duplicate of another syzbot report, please reply with: #syz dup: exact-subject-of-another-report If it's a one-off invalid bug report, please reply with: #syz invalid Note: if the crash happens again, it will cause creation of a new bug report. Note: all commands must start from beginning of the line in the email body. _______________________________________________ devel mailing list devel@linuxdriverproject.org http://driverdev.linuxdriverproject.org/mailman/listinfo/driverdev-devel