Hello, syzbot found the following crash on: HEAD commit: 44456565 Merge tag 'io_uring-5.7-2020-05-22' of git://git... git tree: upstream console output: https://syzkaller.appspot.com/x/log.txt?x=12990cba100000 kernel config: https://syzkaller.appspot.com/x/.config?x=b3368ce0cc5f5ace dashboard link: https://syzkaller.appspot.com/bug?extid=e113a0b970b7b3f394ba compiler: gcc (GCC) 9.0.0 20181231 (experimental) syz repro: https://syzkaller.appspot.com/x/repro.syz?x=165b01e2100000 C reproducer: https://syzkaller.appspot.com/x/repro.c?x=14706016100000 The bug was bisected to: commit 44d8047f1d87adc2fd7eccc88533794f6d88c15e Author: Todd Kjos <tkjos@xxxxxxxxxxx> Date: Tue Aug 28 20:46:25 2018 +0000 binder: use standard functions to allocate fds bisection log: https://syzkaller.appspot.com/x/bisect.txt?x=134e254a100000 final crash: https://syzkaller.appspot.com/x/report.txt?x=10ce254a100000 console output: https://syzkaller.appspot.com/x/log.txt?x=174e254a100000 IMPORTANT: if you fix the bug, please add the following tag to the commit: Reported-by: syzbot+e113a0b970b7b3f394ba@xxxxxxxxxxxxxxxxxxxxxxxxx Fixes: 44d8047f1d87 ("binder: use standard functions to allocate fds") ------------[ cut here ]------------ WARNING: CPU: 1 PID: 7071 at drivers/android/binder.c:2348 binder_transaction_buffer_release+0x601/0x8a0 drivers/android/binder.c:2348 Kernel panic - not syncing: panic_on_warn set ... CPU: 1 PID: 7071 Comm: syz-executor142 Not tainted 5.7.0-rc6-syzkaller #0 Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011 Call Trace: __dump_stack lib/dump_stack.c:77 [inline] dump_stack+0x188/0x20d lib/dump_stack.c:118 panic+0x2e3/0x75c kernel/panic.c:221 __warn.cold+0x2f/0x35 kernel/panic.c:582 report_bug+0x27b/0x2f0 lib/bug.c:195 fixup_bug arch/x86/kernel/traps.c:175 [inline] fixup_bug arch/x86/kernel/traps.c:170 [inline] do_error_trap+0x12b/0x220 arch/x86/kernel/traps.c:267 do_invalid_op+0x32/0x40 arch/x86/kernel/traps.c:286 invalid_op+0x23/0x30 arch/x86/entry/entry_64.S:1027 RIP: 0010:binder_transaction_buffer_release+0x601/0x8a0 drivers/android/binder.c:2348 Code: bb fd 31 ff 41 89 c5 89 c6 e8 bb ff 81 fb 45 85 ed 0f 85 f9 4b 01 00 48 8d 45 40 48 89 44 24 28 e9 fa fa ff ff e8 2f fe 81 fb <0f> 0b e9 87 fc ff ff e8 23 fe 81 fb 4c 8b 44 24 20 48 89 d8 45 31 RSP: 0018:ffffc900018e7620 EFLAGS: 00010293 RAX: ffff8880a12da5c0 RBX: 0000000000000058 RCX: 1ffff1101425b55b RDX: 0000000000000000 RSI: ffffffff85f136f1 RDI: ffff88809db1c048 RBP: ffff88809290a080 R08: ffff8880a12da5c0 R09: fffff5200031cee7 R10: ffffc900018e7737 R11: fffff5200031cee6 R12: ffff88809187a040 R13: 0000000000000060 R14: ffff88809db1c000 R15: 0000000000000060 binder_transaction+0x146d/0x6500 drivers/android/binder.c:3486 binder_thread_write+0x818/0x2560 drivers/android/binder.c:3796 binder_ioctl_write_read drivers/android/binder.c:4847 [inline] binder_ioctl+0x1008/0x1862 drivers/android/binder.c:5024 vfs_ioctl fs/ioctl.c:47 [inline] ksys_ioctl+0x11a/0x180 fs/ioctl.c:771 __do_sys_ioctl fs/ioctl.c:780 [inline] __se_sys_ioctl fs/ioctl.c:778 [inline] __x64_sys_ioctl+0x6f/0xb0 fs/ioctl.c:778 do_syscall_64+0xf6/0x7d0 arch/x86/entry/common.c:295 entry_SYSCALL_64_after_hwframe+0x49/0xb3 RIP: 0033:0x44b749 Code: e8 5c d9 02 00 48 83 c4 18 c3 0f 1f 80 00 00 00 00 48 89 f8 48 89 f7 48 89 d6 48 89 ca 4d 89 c2 4d 89 c8 4c 8b 4c 24 08 0f 05 <48> 3d 01 f0 ff ff 0f 83 bb d0 fb ff c3 66 2e 0f 1f 84 00 00 00 00 RSP: 002b:00007f65c624dce8 EFLAGS: 00000246 ORIG_RAX: 0000000000000010 RAX: ffffffffffffffda RBX: 00000000006ddc48 RCX: 000000000044b749 RDX: 0000000020000540 RSI: 00000000c0306201 RDI: 0000000000000003 RBP: 00000000006ddc40 R08: 0000000000000000 R09: 0000000000000000 R10: 0000000000000000 R11: 0000000000000246 R12: 00000000006ddc4c R13: 00007ffd9783511f R14: 00007f65c624e9c0 R15: 00000000006ddc4c Kernel Offset: disabled Rebooting in 86400 seconds.. --- 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@xxxxxxxxxxxxxxxx. syzbot will keep track of this bug report. See: https://goo.gl/tpsmEJ#status for how to communicate with syzbot. For information about bisection process see: https://goo.gl/tpsmEJ#bisection syzbot can test patches for this bug, for details see: https://goo.gl/tpsmEJ#testing-patches _______________________________________________ devel mailing list devel@xxxxxxxxxxxxxxxxxxxxxx http://driverdev.linuxdriverproject.org/mailman/listinfo/driverdev-devel
