Hello, syzbot found the following crash on: HEAD commit: b0dd1eb2 Merge branch 'akpm' (patches from Andrew) git tree: upstream console output: https://syzkaller.appspot.com/x/log.txt?x=13db9de9e00000 kernel config: https://syzkaller.appspot.com/x/.config?x=a6001be4097ab13c dashboard link: https://syzkaller.appspot.com/bug?extid=274094e62023782eeb17 compiler: clang version 10.0.0 (https://github.com/llvm/llvm-project/ c2443155a0fb245c8f17f2c1c72b6ea391e86e81) syz repro: https://syzkaller.appspot.com/x/repro.syz?x=10ad6a7ee00000 C reproducer: https://syzkaller.appspot.com/x/repro.c?x=13da7a29e00000 Bisection is inconclusive: the first bad commit could be any of: 20cf4e02 rdma: Enable ib_alloc_cq to spread work over a device's comp_vectors 31d0e6c1 mlx5: Fix formats with line continuation whitespace 7a63b31e RDMA/hns: Remove not used UAR assignment 05bb411a RDMA/core: Introduce ratelimited ibdev printk functions b2567ebb RDMA/hns: remove set but not used variable 'irq_num' cfa1f5f2 RDMA/efa: Rate limit admin queue error prints d129e3f4 RDMA/mlx5: Remove DEBUG ODP code 1dc55892 RDMA/core: fix spelling mistake "Nelink" -> "Netlink" 72a7720f RDMA: Introduce ib_port_phys_state enum 691f380d RDMA/cxgb3: Use ib_device_set_netdev() cb560f5f infiniband: Remove dev_err() usage after platform_get_irq() 16e9111e RDMA/efa: Expose device statistics 4929116b RDMA/core: Add common iWARP query port bda9045a IB/bnxt_re: Do not notifify GID change event d8d5cfac RDMA/{cxgb3, cxgb4, i40iw}: Remove common code 525a2c65 Merge branch 'wip/dl-for-rc' into wip/dl-for-next a3e2d4c7 RDMA/hns: remove obsolete Kconfig comment 3e1f000f IB/mlx5: Support per device q counters in switchdev mode cc95b23c RDMA/hns: Encapsulate some lines for setting sq size in user mode 5dcecbc9 IB/mlx5: Refactor code for counters allocation 8ea417ff RDMA/hns: Optimize hns_roce_modify_qp function 0058eb58 qed*: Change dpi_addr to be denoted with __iomem ece9c205 RDMA/hns: Update the prompt message for creating and destroy qp 2288b3b3 RDMA/hns: Remove unnessary init for cmq reg 8b38c538 IB/mlx5: Add CREATE_PSV/DESTROY_PSV for devx interface 1d2fedd8 RDMA/core: Support netlink commands in non init_net net namespaces b5c229dc RDMA/hns: Clean up unnecessary initial assignment 6def7de6 RDMA/hns: Update some comments style 913df8c3 RDMA/mlx4: Annotate boolean arguments as bool and not int 089b645d RDMA/mlx4: Separate creation of RWQ and QP 0e20ebf8 RDMA/hns: Handling the error return value of hem function 4f96061b IB/usnic: Use dev_get_drvdata e7f40440 RDMA/hns: Split bool statement and assign statement 39289bfc RDMA: Make most headers compile stand alone bebdb83f RDMA/hns: Refactor irq request code 4b42d05d RDMA/hns: Remove unnecessary kzalloc cf167e5e RDMA/qedr: Remove Unneeded variable rc 260c3b34 RDMA/hns: Refactor hns_roce_v2_set_hem for hip08 4cc315c5 RDMA/qib: Unneeded variable ret 249f2f92 RDMA/hns: Remove redundant print in hns_roce_v2_ceq_int() 33db6f94 RDMA/hns: Refactor eq table init for hip08 d7019c0f RDMA/hns: Refactor hem table mhop check and calculation d967e262 RDMA/hns: Disable alw_lcl_lpbk of SSU 3ee0e170 RDMA/hns: Package for hns_roce_rereg_user_mr function db50077b RDMA/hns: Use the new APIs for printing log 749b9eef Merge remote-tracking branch 'mlx5-next/mlx5-next' into wip/dl-for-next 89b4b70b RDMA/hns: Optimize hns_roce_mhop_alloc function. 972d7560 IB/mlx5: Add legacy events to DEVX list 99441ab5 RDMA/hns: optimize the duplicated code for qpc setting flow 8293a598 IB/mlx5: Expose XRQ legacy commands over the DEVX interface 947441ea RDMA/hns: Use a separated function for setting extend sge paramters 606bf89e RDMA/hns: Refactor for hns_roce_v2_modify_qp function 9dc4cfff RDMA/mlx5: Annotate lock dependency in bind/unbind slave port 0e1aa6f0 RDMA/hns: Logic optimization of wc_flags 2a2f1887 RDMA/hns: Refactor the code of creating srq 4f8f0d5e RDMA/hns: Package the flow of creating cq 76827087 RDMA/hns: Bugfix for creating qp attached to srq a5c9c299 IB/mlx5: Avoid unnecessary typecast d7e5ca88 RDMA/hns: Modify pi vlaue when cq overflows 56594ae1 RDMA/core: Annotate destroy of mutex to ensure that it is released as unlocked 9bba3f0c RDMA/hns: Bugfix for slab-out-of-bounds when unloading hip08 driver a511f822 RDMA/hns: Fix comparison of unsigned long variable 'end' with less than zero bf8c02f9 RDMA/hns: bugfix for slab-out-of-bounds when loading hip08 driver 77905379 RDMA/hns: Remove unuseful member ecc53f8a RDMA/mlx4: Untag user pointers in mlx4_get_umem_mr 795130b3 IB/hfi1: Remove unused define a7325af7 RDMA/hns: Fix some white space check_mtu_validate() b2299e83 RDMA: Delete DEBUG code b2590bdd IB/hfi1: Do not update hcrc for a KDETH packet during fault injection 868df536 Merge branch 'odp_fixes' into rdma.git for-next bisection log: https://syzkaller.appspot.com/x/bisect.txt?x=1542127ee00000 IMPORTANT: if you fix the bug, please add the following tag to the commit: Reported-by: syzbot+274094e62023782eeb17@xxxxxxxxxxxxxxxxxxxxxxxxx batman_adv: batadv0: Interface activated: batadv_slave_1 infiniband syz1: set active infiniband syz1: added vlan0 general protection fault, probably for non-canonical address 0xdffffc0000000086: 0000 [#1] PREEMPT SMP KASAN KASAN: null-ptr-deref in range [0x0000000000000430-0x0000000000000437] CPU: 0 PID: 8852 Comm: syz-executor043 Not tainted 5.6.0-rc2-syzkaller #0 Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011 RIP: 0010:dev_to_node include/linux/device.h:663 [inline] RIP: 0010:rds_ib_add_one+0x81/0xe50 net/rds/ib.c:140 Code: b7 a8 06 00 00 4c 89 f0 48 c1 e8 03 42 80 3c 28 00 74 08 4c 89 f7 e8 0e e4 1d fa bb 30 04 00 00 49 03 1e 48 89 d8 48 c1 e8 03 <42> 8a 04 28 84 c0 0f 85 f0 0a 00 00 8b 1b 48 c7 c0 28 0c 09 89 48 RSP: 0018:ffffc90003087298 EFLAGS: 00010202 RAX: 0000000000000086 RBX: 0000000000000430 RCX: 0000000000000000 RDX: 0000000000000000 RSI: 0000000000000001 RDI: 0000000000000001 RBP: ffffc900030872f0 R08: ffffffff87964c3c R09: ffffed1014fd109c R10: ffffed1014fd109c R11: 0000000000000000 R12: 0000000000000000 R13: dffffc0000000000 R14: ffff8880a7e886a8 R15: ffff8880a7e88000 FS: 0000000000c3d880(0000) GS:ffff8880aea00000(0000) knlGS:0000000000000000 CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033 CR2: 00007f0318ed0000 CR3: 00000000a3167000 CR4: 00000000001406f0 DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000 DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400 Call Trace: add_client_context+0x482/0x660 drivers/infiniband/core/device.c:681 enable_device_and_get+0x15b/0x370 drivers/infiniband/core/device.c:1316 ib_register_device+0x124d/0x15b0 drivers/infiniband/core/device.c:1382 rxe_register_device+0x3f6/0x530 drivers/infiniband/sw/rxe/rxe_verbs.c:1231 rxe_add+0x1373/0x14f0 drivers/infiniband/sw/rxe/rxe.c:302 rxe_net_add+0x79/0xe0 drivers/infiniband/sw/rxe/rxe_net.c:539 rxe_newlink+0x31/0x90 drivers/infiniband/sw/rxe/rxe.c:318 nldev_newlink+0x403/0x4a0 drivers/infiniband/core/nldev.c:1538 rdma_nl_rcv_msg drivers/infiniband/core/netlink.c:195 [inline] rdma_nl_rcv_skb drivers/infiniband/core/netlink.c:239 [inline] rdma_nl_rcv+0x701/0xa20 drivers/infiniband/core/netlink.c:259 netlink_unicast_kernel net/netlink/af_netlink.c:1302 [inline] netlink_unicast+0x766/0x920 net/netlink/af_netlink.c:1328 netlink_sendmsg+0xa2b/0xd40 net/netlink/af_netlink.c:1917 sock_sendmsg_nosec net/socket.c:652 [inline] sock_sendmsg net/socket.c:672 [inline] ____sys_sendmsg+0x4f7/0x7f0 net/socket.c:2343 ___sys_sendmsg net/socket.c:2397 [inline] __sys_sendmsg+0x1ed/0x290 net/socket.c:2430 __do_sys_sendmsg net/socket.c:2439 [inline] __se_sys_sendmsg net/socket.c:2437 [inline] __x64_sys_sendmsg+0x7f/0x90 net/socket.c:2437 do_syscall_64+0xf7/0x1c0 arch/x86/entry/common.c:294 entry_SYSCALL_64_after_hwframe+0x49/0xbe RIP: 0033:0x443499 Code: 18 89 d0 c3 66 2e 0f 1f 84 00 00 00 00 00 0f 1f 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 7b 10 fc ff c3 66 2e 0f 1f 84 00 00 00 00 RSP: 002b:00007ffdacfaf488 EFLAGS: 00000246 ORIG_RAX: 000000000000002e RAX: ffffffffffffffda RBX: 0000000000000003 RCX: 0000000000443499 RDX: 0000000000000000 RSI: 0000000020000000 RDI: 0000000000000003 RBP: 00007ffdacfaf4a0 R08: 0000000001bbbbbb R09: 0000000001bbbbbb R10: 0000000000000000 R11: 0000000000000246 R12: 0000000000000000 R13: 0000000000404a30 R14: 0000000000000000 R15: 0000000000000000 Modules linked in: ---[ end trace 542f2d063f2edc54 ]--- RIP: 0010:dev_to_node include/linux/device.h:663 [inline] RIP: 0010:rds_ib_add_one+0x81/0xe50 net/rds/ib.c:140 Code: b7 a8 06 00 00 4c 89 f0 48 c1 e8 03 42 80 3c 28 00 74 08 4c 89 f7 e8 0e e4 1d fa bb 30 04 00 00 49 03 1e 48 89 d8 48 c1 e8 03 <42> 8a 04 28 84 c0 0f 85 f0 0a 00 00 8b 1b 48 c7 c0 28 0c 09 89 48 RSP: 0018:ffffc90003087298 EFLAGS: 00010202 RAX: 0000000000000086 RBX: 0000000000000430 RCX: 0000000000000000 RDX: 0000000000000000 RSI: 0000000000000001 RDI: 0000000000000001 RBP: ffffc900030872f0 R08: ffffffff87964c3c R09: ffffed1014fd109c R10: ffffed1014fd109c R11: 0000000000000000 R12: 0000000000000000 R13: dffffc0000000000 R14: ffff8880a7e886a8 R15: ffff8880a7e88000 FS: 0000000000c3d880(0000) GS:ffff8880aea00000(0000) knlGS:0000000000000000 CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033 CR2: 00007f0318ed0000 CR3: 00000000a3167000 CR4: 00000000001406f0 DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000 DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400 --- 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
