On Mon, Oct 8, 2018 at 6:12 PM, syzbot <syzbot+1ed9dfaa984c88cf0ef8@xxxxxxxxxxxxxxxxxxxxxxxxx> wrote: > Hello, > > syzbot found the following crash on: > > HEAD commit: ae16eea39a86 Add linux-next specific files for 20181008 > git tree: linux-next > console output: https://syzkaller.appspot.com/x/log.txt?x=12e7c6a1400000 > kernel config: https://syzkaller.appspot.com/x/.config?x=42525ce985d1a955 > dashboard link: https://syzkaller.appspot.com/bug?extid=1ed9dfaa984c88cf0ef8 > compiler: gcc (GCC) 8.0.1 20180413 (experimental) > > Unfortunately, I don't have any reproducer for this crash yet. > > IMPORTANT: if you fix the bug, please add the following tag to the commit: > Reported-by: syzbot+1ed9dfaa984c88cf0ef8@xxxxxxxxxxxxxxxxxxxxxxxxx This was triggered by the following program, all is rdma-related, so +rdma maintainers. 10:27:26 executing program 5: r0 = openat$rdma_cm(0xffffffffffffff9c, &(0x7f0000000380)='/dev/infiniband/rdma_cm\x00', 0x2, 0x0) write$RDMA_USER_CM_CMD_CREATE_ID(r0, &(0x7f0000000080)={0x0, 0x18, 0xfa00, {0x0, &(0x7f0000000040)={<r1=>0xffffffffffffffff}, 0x13f}}, 0x12d) write$RDMA_USER_CM_CMD_RESOLVE_IP(r0, &(0x7f0000000200)={0x3, 0x40, 0xfa00, {{0xa, 0x4e21}, {0xa, 0x0, 0x0, @mcast1}, r1}}, 0x48) write$RDMA_USER_CM_CMD_CREATE_ID(r0, &(0x7f0000000340)={0x0, 0x18, 0xfa00, {0x0, &(0x7f0000000300)={<r2=>0xffffffffffffffff}, 0x13f}}, 0x20) write$RDMA_USER_CM_CMD_SET_OPTION(r0, &(0x7f00000002c0)={0xe, 0x18, 0xfa00, @id_afonly={&(0x7f0000000000)=0x1, r1, 0x0, 0x2, 0x4}}, 0x20) write$RDMA_USER_CM_CMD_RESOLVE_IP(r0, &(0x7f0000000100)={0x3, 0x40, 0xfa00, {{0x2, 0x4e21}, {0xa, 0x0, 0x0, @local}, r2}}, 0x1ff) write$RDMA_USER_CM_CMD_DESTROY_ID(r0, &(0x7f0000000180)={0x1, 0x10, 0xfa00, {&(0x7f00000000c0), r2}}, 0x18) > WARNING: CPU: 1 PID: 16271 at kernel/fork.c:718 > __put_task_struct+0x3ef/0x620 kernel/fork.c:718 > Kernel panic - not syncing: panic_on_warn set ... > > CPU: 1 PID: 16271 Comm: syz-executor5 Not tainted 4.19.0-rc7-next-20181008+ > #89 > 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+0x244/0x3ab lib/dump_stack.c:113 > panic+0x238/0x4e7 kernel/panic.c:184 > __warn.cold.8+0x163/0x1ba kernel/panic.c:536 > report_bug+0x254/0x2d0 lib/bug.c:186 > fixup_bug arch/x86/kernel/traps.c:178 [inline] > do_error_trap+0x11b/0x200 arch/x86/kernel/traps.c:271 > do_invalid_op+0x36/0x40 arch/x86/kernel/traps.c:290 > invalid_op+0x14/0x20 arch/x86/entry/entry_64.S:969 > RIP: 0010:__put_task_struct+0x3ef/0x620 kernel/fork.c:718 > Code: 4c 89 ee e8 d3 9d 7b 00 e9 a1 fe ff ff e8 89 53 37 00 0f 0b e9 7c fd > ff ff e8 7d 53 37 00 0f 0b e9 87 fd ff ff e8 71 53 37 00 <0f> 0b e9 d0 fc ff > ff e8 65 53 37 00 49 8d 87 90 05 00 00 31 f6 48 > RSP: 0018:ffff88018dbcf808 EFLAGS: 00010293 > RAX: ffff880187474180 RBX: ffff88018cc7a1c0 RCX: ffffffff8147298d > RDX: 0000000000000000 RSI: ffffffff81472cbf RDI: 0000000000000005 > RBP: ffff88018dbcf8e8 R08: ffff880187474180 R09: ffffed003198f43c > R10: ffffed003198f43c R11: ffff88018cc7a1e3 R12: 1ffff10031b79f04 > R13: 0000000000000000 R14: ffff88018dbcf8c0 R15: ffff88018daceb40 > put_task_struct include/linux/sched/task.h:96 [inline] > rdma_restrack_del+0x2e0/0x3b0 drivers/infiniband/core/restrack.c:243 > rdma_destroy_id+0x126/0xcc0 drivers/infiniband/core/cma.c:1820 > ucma_close+0x114/0x310 drivers/infiniband/core/ucma.c:1767 > __fput+0x3bc/0xa70 fs/file_table.c:279 > ____fput+0x15/0x20 fs/file_table.c:312 > task_work_run+0x1e8/0x2a0 kernel/task_work.c:113 > tracehook_notify_resume include/linux/tracehook.h:188 [inline] > exit_to_usermode_loop+0x318/0x380 arch/x86/entry/common.c:166 > prepare_exit_to_usermode arch/x86/entry/common.c:197 [inline] > syscall_return_slowpath arch/x86/entry/common.c:268 [inline] > do_syscall_64+0x6be/0x820 arch/x86/entry/common.c:293 > entry_SYSCALL_64_after_hwframe+0x49/0xbe > RIP: 0033:0x411051 > Code: 75 14 b8 03 00 00 00 0f 05 48 3d 01 f0 ff ff 0f 83 34 19 00 00 c3 48 > 83 ec 08 e8 0a fc ff ff 48 89 04 24 b8 03 00 00 00 0f 05 <48> 8b 3c 24 48 89 > c2 e8 53 fc ff ff 48 89 d0 48 83 c4 08 48 3d 01 > RSP: 002b:00007ffd6e8617b0 EFLAGS: 00000293 ORIG_RAX: 0000000000000003 > RAX: 0000000000000000 RBX: 0000000000000005 RCX: 0000000000411051 > RDX: 0000000000000000 RSI: 0000000000731850 RDI: 0000000000000004 > RBP: 0000000000000000 R08: 0000000000000000 R09: 0000000000000000 > R10: 00007ffd6e8616e0 R11: 0000000000000293 R12: 0000000000000000 > R13: 0000000000000001 R14: 0000000000000156 R15: 0000000000000005 > 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#bug-status-tracking for how to communicate with > syzbot. > > -- > You received this message because you are subscribed to the Google Groups > "syzkaller-bugs" group. > To unsubscribe from this group and stop receiving emails from it, send an > email to syzkaller-bugs+unsubscribe@xxxxxxxxxxxxxxxx. > To view this discussion on the web visit > https://groups.google.com/d/msgid/syzkaller-bugs/000000000000b3d5610577b9e12c%40google.com. > For more options, visit https://groups.google.com/d/optout.
