[....] Starting OpenBSD Secure Shell server: sshd[ 24.440980] random: sshd: uninitialized urandom read (32 bytes read) [?25l[?1c7[ ok 8[?25h[?0c. Debian GNU/Linux 7 syzkaller ttyS0 syzkaller login: [ 26.182778] random: sshd: uninitialized urandom read (32 bytes read) [ 26.459382] sshd (5320) used greatest stack depth: 16776 bytes left [ 26.534842] random: sshd: uninitialized urandom read (32 bytes read) [ 27.141489] random: sshd: uninitialized urandom read (32 bytes read) [ 29.688293] random: sshd: uninitialized urandom read (32 bytes read) Warning: Permanently added '10.128.0.14' (ECDSA) to the list of known hosts. [ 35.226111] random: sshd: uninitialized urandom read (32 bytes read) 2018/09/12 00:39:51 parsed 1 programs [ 36.316695] random: cc1: uninitialized urandom read (8 bytes read) 2018/09/12 00:39:53 executed programs: 0 [ 37.870452] IPVS: ftp: loaded support on port[0] = 21 [ 37.894755] IPVS: ftp: loaded support on port[0] = 21 [ 37.911516] IPVS: ftp: loaded support on port[0] = 21 [ 37.922412] IPVS: ftp: loaded support on port[0] = 21 [ 37.937273] IPVS: ftp: loaded support on port[0] = 21 [ 37.947008] IPVS: ftp: loaded support on port[0] = 21 [ 38.465948] ip (5433) used greatest stack depth: 16552 bytes left [ 38.979786] bridge0: port 1(bridge_slave_0) entered blocking state [ 38.998382] bridge0: port 1(bridge_slave_0) entered disabled state [ 39.005552] device bridge_slave_0 entered promiscuous mode [ 39.014084] bridge0: port 1(bridge_slave_0) entered blocking state [ 39.020690] bridge0: port 1(bridge_slave_0) entered disabled state [ 39.027805] device bridge_slave_0 entered promiscuous mode [ 39.041164] bridge0: port 1(bridge_slave_0) entered blocking state [ 39.049115] bridge0: port 1(bridge_slave_0) entered disabled state [ 39.056756] device bridge_slave_0 entered promiscuous mode [ 39.072500] bridge0: port 2(bridge_slave_1) entered blocking state [ 39.083640] bridge0: port 2(bridge_slave_1) entered disabled state [ 39.090589] device bridge_slave_1 entered promiscuous mode [ 39.101533] bridge0: port 1(bridge_slave_0) entered blocking state [ 39.108983] bridge0: port 1(bridge_slave_0) entered disabled state [ 39.116233] device bridge_slave_0 entered promiscuous mode [ 39.126626] bridge0: port 2(bridge_slave_1) entered blocking state [ 39.133125] bridge0: port 2(bridge_slave_1) entered disabled state [ 39.140081] device bridge_slave_1 entered promiscuous mode [ 39.147935] bridge0: port 2(bridge_slave_1) entered blocking state [ 39.155834] bridge0: port 2(bridge_slave_1) entered disabled state [ 39.162828] device bridge_slave_1 entered promiscuous mode [ 39.170693] bridge0: port 1(bridge_slave_0) entered blocking state [ 39.177613] bridge0: port 1(bridge_slave_0) entered disabled state [ 39.184625] device bridge_slave_0 entered promiscuous mode [ 39.191872] bridge0: port 1(bridge_slave_0) entered blocking state [ 39.198488] bridge0: port 1(bridge_slave_0) entered disabled state [ 39.206106] device bridge_slave_0 entered promiscuous mode [ 39.214110] IPv6: ADDRCONF(NETDEV_UP): veth0_to_bridge: link is not ready [ 39.225352] bridge0: port 2(bridge_slave_1) entered blocking state [ 39.231681] bridge0: port 2(bridge_slave_1) entered disabled state [ 39.239068] device bridge_slave_1 entered promiscuous mode [ 39.246749] IPv6: ADDRCONF(NETDEV_UP): veth0_to_bridge: link is not ready [ 39.256411] IPv6: ADDRCONF(NETDEV_UP): veth0_to_bridge: link is not ready [ 39.265559] IPv6: ADDRCONF(NETDEV_UP): veth0_to_bridge: link is not ready [ 39.275965] bridge0: port 2(bridge_slave_1) entered blocking state [ 39.282352] bridge0: port 2(bridge_slave_1) entered disabled state [ 39.293300] device bridge_slave_1 entered promiscuous mode [ 39.303869] bridge0: port 2(bridge_slave_1) entered blocking state [ 39.310214] bridge0: port 2(bridge_slave_1) entered disabled state [ 39.317447] device bridge_slave_1 entered promiscuous mode [ 39.324136] IPv6: ADDRCONF(NETDEV_UP): veth1_to_bridge: link is not ready [ 39.332501] IPv6: ADDRCONF(NETDEV_UP): veth1_to_bridge: link is not ready [ 39.342009] IPv6: ADDRCONF(NETDEV_UP): veth1_to_bridge: link is not ready [ 39.351701] IPv6: ADDRCONF(NETDEV_UP): veth1_to_bridge: link is not ready [ 39.364643] IPv6: ADDRCONF(NETDEV_UP): veth0_to_bridge: link is not ready [ 39.371841] IPv6: ADDRCONF(NETDEV_UP): veth0_to_bridge: link is not ready [ 39.391690] IPv6: ADDRCONF(NETDEV_UP): veth1_to_bridge: link is not ready [ 39.417419] IPv6: ADDRCONF(NETDEV_UP): veth1_to_bridge: link is not ready [ 39.509545] bond0: Enslaving bond_slave_0 as an active interface with an up link [ 39.584430] bond0: Enslaving bond_slave_0 as an active interface with an up link [ 39.595383] bond0: Enslaving bond_slave_1 as an active interface with an up link [ 39.608114] bond0: Enslaving bond_slave_0 as an active interface with an up link [ 39.623039] bond0: Enslaving bond_slave_0 as an active interface with an up link [ 39.634022] bond0: Enslaving bond_slave_0 as an active interface with an up link [ 39.647864] bond0: Enslaving bond_slave_1 as an active interface with an up link [ 39.661109] ip (5644) used greatest stack depth: 16360 bytes left [ 39.671763] bond0: Enslaving bond_slave_0 as an active interface with an up link [ 39.691487] bond0: Enslaving bond_slave_1 as an active interface with an up link [ 39.710514] bond0: Enslaving bond_slave_1 as an active interface with an up link [ 39.735376] bond0: Enslaving bond_slave_1 as an active interface with an up link [ 39.754937] IPv6: ADDRCONF(NETDEV_UP): veth0_to_bond: link is not ready [ 39.762180] IPv6: ADDRCONF(NETDEV_UP): veth0_to_bond: link is not ready [ 39.772431] IPv6: ADDRCONF(NETDEV_CHANGE): veth0_to_bond: link becomes ready [ 39.782869] IPv6: ADDRCONF(NETDEV_CHANGE): veth0_to_bond: link becomes ready [ 39.803461] bond0: Enslaving bond_slave_1 as an active interface with an up link [ 39.816089] IPv6: ADDRCONF(NETDEV_UP): veth0_to_bond: link is not ready [ 39.824907] IPv6: ADDRCONF(NETDEV_UP): veth0_to_bond: link is not ready [ 39.831950] IPv6: ADDRCONF(NETDEV_UP): veth0_to_bond: link is not ready [ 39.846283] IPv6: ADDRCONF(NETDEV_CHANGE): veth0_to_bond: link becomes ready [ 39.858230] IPv6: ADDRCONF(NETDEV_CHANGE): veth0_to_bond: link becomes ready [ 39.872897] IPv6: ADDRCONF(NETDEV_CHANGE): veth0_to_bond: link becomes ready [ 39.883168] IPv6: ADDRCONF(NETDEV_UP): veth1_to_bond: link is not ready [ 39.895027] IPv6: ADDRCONF(NETDEV_UP): veth1_to_bond: link is not ready [ 39.905103] IPv6: ADDRCONF(NETDEV_UP): veth1_to_bond: link is not ready [ 39.914109] IPv6: ADDRCONF(NETDEV_UP): veth1_to_bond: link is not ready [ 39.923005] IPv6: ADDRCONF(NETDEV_UP): veth1_to_bond: link is not ready [ 39.929813] IPv6: ADDRCONF(NETDEV_CHANGE): veth1_to_bond: link becomes ready [ 39.946613] IPv6: ADDRCONF(NETDEV_CHANGE): veth1_to_bond: link becomes ready [ 39.961310] IPv6: ADDRCONF(NETDEV_CHANGE): veth1_to_bond: link becomes ready [ 39.973846] IPv6: ADDRCONF(NETDEV_CHANGE): veth1_to_bond: link becomes ready [ 39.981403] IPv6: ADDRCONF(NETDEV_CHANGE): veth1_to_bond: link becomes ready [ 39.989893] IPv6: ADDRCONF(NETDEV_UP): veth0_to_bond: link is not ready [ 40.021496] IPv6: ADDRCONF(NETDEV_CHANGE): veth0_to_bond: link becomes ready [ 40.069930] IPv6: ADDRCONF(NETDEV_UP): veth1_to_bond: link is not ready [ 40.086783] IPv6: ADDRCONF(NETDEV_CHANGE): veth1_to_bond: link becomes ready [ 40.170653] IPv6: ADDRCONF(NETDEV_UP): team_slave_0: link is not ready [ 40.189216] team0: Port device team_slave_0 added [ 40.211999] IPv6: ADDRCONF(NETDEV_UP): team_slave_0: link is not ready [ 40.220623] team0: Port device team_slave_0 added [ 40.231960] IPv6: ADDRCONF(NETDEV_UP): team_slave_0: link is not ready [ 40.245144] team0: Port device team_slave_0 added [ 40.250470] IPv6: ADDRCONF(NETDEV_UP): team_slave_0: link is not ready [ 40.259277] team0: Port device team_slave_0 added [ 40.266423] IPv6: ADDRCONF(NETDEV_UP): team_slave_0: link is not ready [ 40.274552] team0: Port device team_slave_0 added [ 40.285449] IPv6: ADDRCONF(NETDEV_UP): team_slave_1: link is not ready [ 40.293746] team0: Port device team_slave_1 added [ 40.311492] IPv6: ADDRCONF(NETDEV_UP): team_slave_1: link is not ready [ 40.323900] team0: Port device team_slave_1 added [ 40.332180] IPv6: ADDRCONF(NETDEV_UP): team_slave_1: link is not ready [ 40.352918] team0: Port device team_slave_1 added [ 40.361688] IPv6: ADDRCONF(NETDEV_UP): team_slave_0: link is not ready [ 40.371045] team0: Port device team_slave_0 added [ 40.381318] IPv6: ADDRCONF(NETDEV_UP): team_slave_1: link is not ready [ 40.395175] team0: Port device team_slave_1 added [ 40.402105] IPv6: ADDRCONF(NETDEV_UP): team_slave_1: link is not ready [ 40.426683] team0: Port device team_slave_1 added [ 40.432068] IPv6: ADDRCONF(NETDEV_CHANGE): team_slave_0: link becomes ready [ 40.442468] IPv6: ADDRCONF(NETDEV_CHANGE): team_slave_0: link becomes ready [ 40.468715] IPv6: ADDRCONF(NETDEV_CHANGE): team_slave_1: link becomes ready [ 40.486029] IPv6: ADDRCONF(NETDEV_UP): team_slave_1: link is not ready [ 40.496244] team0: Port device team_slave_1 added [ 40.511231] IPv6: ADDRCONF(NETDEV_CHANGE): team_slave_0: link becomes ready [ 40.529302] IPv6: ADDRCONF(NETDEV_CHANGE): team_slave_1: link becomes ready [ 40.544422] IPv6: ADDRCONF(NETDEV_CHANGE): team_slave_0: link becomes ready [ 40.563445] IPv6: ADDRCONF(NETDEV_UP): bridge_slave_0: link is not ready [ 40.574671] IPv6: ADDRCONF(NETDEV_UP): bridge_slave_0: link is not ready [ 40.587396] IPv6: ADDRCONF(NETDEV_CHANGE): team_slave_0: link becomes ready [ 40.600631] IPv6: ADDRCONF(NETDEV_CHANGE): team_slave_1: link becomes ready [ 40.615974] IPv6: ADDRCONF(NETDEV_CHANGE): bridge_slave_0: link becomes ready [ 40.630962] IPv6: ADDRCONF(NETDEV_CHANGE): veth0_to_bridge: link becomes ready [ 40.639113] IPv6: ADDRCONF(NETDEV_CHANGE): bridge_slave_0: link becomes ready [ 40.647084] IPv6: ADDRCONF(NETDEV_CHANGE): veth0_to_bridge: link becomes ready [ 40.655095] IPv6: ADDRCONF(NETDEV_CHANGE): team_slave_1: link becomes ready [ 40.668011] IPv6: ADDRCONF(NETDEV_UP): bridge_slave_0: link is not ready [ 40.681680] IPv6: ADDRCONF(NETDEV_UP): bridge_slave_1: link is not ready [ 40.694583] IPv6: ADDRCONF(NETDEV_UP): bridge_slave_0: link is not ready [ 40.702502] IPv6: ADDRCONF(NETDEV_UP): bridge_slave_1: link is not ready [ 40.720923] IPv6: ADDRCONF(NETDEV_CHANGE): team_slave_0: link becomes ready [ 40.735785] IPv6: ADDRCONF(NETDEV_CHANGE): bridge_slave_0: link becomes ready [ 40.751307] IPv6: ADDRCONF(NETDEV_CHANGE): veth0_to_bridge: link becomes ready [ 40.759536] IPv6: ADDRCONF(NETDEV_CHANGE): bridge_slave_1: link becomes ready [ 40.767604] IPv6: ADDRCONF(NETDEV_CHANGE): veth1_to_bridge: link becomes ready [ 40.775532] IPv6: ADDRCONF(NETDEV_CHANGE): bridge_slave_0: link becomes ready [ 40.783342] IPv6: ADDRCONF(NETDEV_CHANGE): veth0_to_bridge: link becomes ready [ 40.791007] IPv6: ADDRCONF(NETDEV_CHANGE): bridge_slave_1: link becomes ready [ 40.798935] IPv6: ADDRCONF(NETDEV_CHANGE): veth1_to_bridge: link becomes ready [ 40.809269] IPv6: ADDRCONF(NETDEV_UP): veth1_to_team: link is not ready [ 40.816414] IPv6: ADDRCONF(NETDEV_UP): veth1_to_team: link is not ready [ 40.826551] IPv6: ADDRCONF(NETDEV_UP): bridge_slave_1: link is not ready [ 40.843648] IPv6: ADDRCONF(NETDEV_CHANGE): veth1_to_team: link becomes ready [ 40.851417] IPv6: ADDRCONF(NETDEV_CHANGE): team_slave_1: link becomes ready [ 40.872971] IPv6: ADDRCONF(NETDEV_CHANGE): veth1_to_team: link becomes ready [ 40.886003] IPv6: ADDRCONF(NETDEV_CHANGE): team_slave_1: link becomes ready [ 40.893559] IPv6: ADDRCONF(NETDEV_CHANGE): bridge_slave_1: link becomes ready [ 40.901262] IPv6: ADDRCONF(NETDEV_CHANGE): veth1_to_bridge: link becomes ready [ 40.909411] IPv6: ADDRCONF(NETDEV_UP): bridge_slave_1: link is not ready [ 40.923371] IPv6: ADDRCONF(NETDEV_UP): bridge_slave_0: link is not ready [ 40.939098] IPv6: ADDRCONF(NETDEV_CHANGE): bridge_slave_1: link becomes ready [ 40.957626] IPv6: ADDRCONF(NETDEV_CHANGE): veth1_to_bridge: link becomes ready [ 40.979144] IPv6: ADDRCONF(NETDEV_CHANGE): bridge_slave_0: link becomes ready [ 40.987243] IPv6: ADDRCONF(NETDEV_CHANGE): veth0_to_bridge: link becomes ready [ 41.002382] IPv6: ADDRCONF(NETDEV_UP): bridge_slave_0: link is not ready [ 41.027193] IPv6: ADDRCONF(NETDEV_CHANGE): bridge_slave_0: link becomes ready [ 41.039354] IPv6: ADDRCONF(NETDEV_CHANGE): veth0_to_bridge: link becomes ready [ 41.056808] IPv6: ADDRCONF(NETDEV_UP): bridge_slave_1: link is not ready [ 41.076011] IPv6: ADDRCONF(NETDEV_CHANGE): bridge_slave_1: link becomes ready [ 41.092968] IPv6: ADDRCONF(NETDEV_CHANGE): veth1_to_bridge: link becomes ready [ 41.115012] IPv6: ADDRCONF(NETDEV_UP): bridge_slave_1: link is not ready [ 41.140962] IPv6: ADDRCONF(NETDEV_CHANGE): bridge_slave_1: link becomes ready [ 41.161054] IPv6: ADDRCONF(NETDEV_CHANGE): veth1_to_bridge: link becomes ready [ 41.602002] bridge0: port 2(bridge_slave_1) entered blocking state [ 41.608588] bridge0: port 2(bridge_slave_1) entered forwarding state [ 41.615487] bridge0: port 1(bridge_slave_0) entered blocking state [ 41.621858] bridge0: port 1(bridge_slave_0) entered forwarding state [ 41.634594] IPv6: ADDRCONF(NETDEV_UP): bridge0: link is not ready [ 41.647575] bridge0: port 2(bridge_slave_1) entered blocking state [ 41.653981] bridge0: port 2(bridge_slave_1) entered forwarding state [ 41.660675] bridge0: port 1(bridge_slave_0) entered blocking state [ 41.667118] bridge0: port 1(bridge_slave_0) entered forwarding state [ 41.677061] IPv6: ADDRCONF(NETDEV_UP): bridge0: link is not ready [ 41.698364] bridge0: port 2(bridge_slave_1) entered blocking state [ 41.704771] bridge0: port 2(bridge_slave_1) entered forwarding state [ 41.711444] bridge0: port 1(bridge_slave_0) entered blocking state [ 41.717878] bridge0: port 1(bridge_slave_0) entered forwarding state [ 41.731757] IPv6: ADDRCONF(NETDEV_UP): bridge0: link is not ready [ 41.812926] IPv6: ADDRCONF(NETDEV_CHANGE): bridge0: link becomes ready [ 41.820605] IPv6: ADDRCONF(NETDEV_CHANGE): bridge0: link becomes ready [ 41.841474] IPv6: ADDRCONF(NETDEV_CHANGE): bridge0: link becomes ready [ 41.866020] bridge0: port 2(bridge_slave_1) entered blocking state [ 41.872392] bridge0: port 2(bridge_slave_1) entered forwarding state [ 41.879157] bridge0: port 1(bridge_slave_0) entered blocking state [ 41.885614] bridge0: port 1(bridge_slave_0) entered forwarding state [ 41.908572] IPv6: ADDRCONF(NETDEV_UP): bridge0: link is not ready [ 41.927348] bridge0: port 2(bridge_slave_1) entered blocking state [ 41.933770] bridge0: port 2(bridge_slave_1) entered forwarding state [ 41.940425] bridge0: port 1(bridge_slave_0) entered blocking state [ 41.946856] bridge0: port 1(bridge_slave_0) entered forwarding state [ 41.958903] IPv6: ADDRCONF(NETDEV_UP): bridge0: link is not ready [ 41.971673] bridge0: port 2(bridge_slave_1) entered blocking state [ 41.978075] bridge0: port 2(bridge_slave_1) entered forwarding state [ 41.984823] bridge0: port 1(bridge_slave_0) entered blocking state [ 41.991234] bridge0: port 1(bridge_slave_0) entered forwarding state [ 42.000657] IPv6: ADDRCONF(NETDEV_UP): bridge0: link is not ready [ 42.824071] IPv6: ADDRCONF(NETDEV_CHANGE): bridge0: link becomes ready [ 42.831316] IPv6: ADDRCONF(NETDEV_CHANGE): bridge0: link becomes ready [ 42.867042] IPv6: ADDRCONF(NETDEV_CHANGE): bridge0: link becomes ready [ 44.461310] 8021q: adding VLAN 0 to HW filter on device bond0 [ 44.484940] 8021q: adding VLAN 0 to HW filter on device bond0 [ 44.625603] 8021q: adding VLAN 0 to HW filter on device bond0 [ 44.634815] 8021q: adding VLAN 0 to HW filter on device bond0 [ 44.700082] IPv6: ADDRCONF(NETDEV_UP): veth0: link is not ready [ 44.719954] IPv6: ADDRCONF(NETDEV_UP): veth0: link is not ready [ 44.754336] 8021q: adding VLAN 0 to HW filter on device bond0 [ 44.811395] 8021q: adding VLAN 0 to HW filter on device bond0 [ 44.881408] IPv6: ADDRCONF(NETDEV_UP): veth0: link is not ready [ 44.928954] IPv6: ADDRCONF(NETDEV_UP): veth0: link is not ready [ 44.971583] IPv6: ADDRCONF(NETDEV_UP): veth1: link is not ready [ 44.992446] IPv6: ADDRCONF(NETDEV_CHANGE): veth1: link becomes ready [ 45.001404] IPv6: ADDRCONF(NETDEV_CHANGE): veth0: link becomes ready [ 45.017285] IPv6: ADDRCONF(NETDEV_UP): veth1: link is not ready [ 45.028183] IPv6: ADDRCONF(NETDEV_UP): veth0: link is not ready [ 45.044751] IPv6: ADDRCONF(NETDEV_CHANGE): veth1: link becomes ready [ 45.051820] IPv6: ADDRCONF(NETDEV_CHANGE): veth0: link becomes ready [ 45.118044] IPv6: ADDRCONF(NETDEV_UP): veth0: link is not ready [ 45.205728] IPv6: ADDRCONF(NETDEV_UP): veth1: link is not ready [ 45.211874] IPv6: ADDRCONF(NETDEV_CHANGE): veth1: link becomes ready [ 45.223935] IPv6: ADDRCONF(NETDEV_CHANGE): veth0: link becomes ready [ 45.243955] 8021q: adding VLAN 0 to HW filter on device team0 [ 45.259966] IPv6: ADDRCONF(NETDEV_UP): veth1: link is not ready [ 45.275239] IPv6: ADDRCONF(NETDEV_UP): veth1: link is not ready [ 45.281496] IPv6: ADDRCONF(NETDEV_CHANGE): veth1: link becomes ready [ 45.293405] IPv6: ADDRCONF(NETDEV_CHANGE): veth0: link becomes ready [ 45.307668] IPv6: ADDRCONF(NETDEV_CHANGE): veth1: link becomes ready [ 45.322385] IPv6: ADDRCONF(NETDEV_CHANGE): veth0: link becomes ready [ 45.336585] 8021q: adding VLAN 0 to HW filter on device team0 [ 45.483090] 8021q: adding VLAN 0 to HW filter on device team0 [ 45.496727] IPv6: ADDRCONF(NETDEV_UP): veth1: link is not ready [ 45.519526] IPv6: ADDRCONF(NETDEV_CHANGE): veth1: link becomes ready [ 45.529593] IPv6: ADDRCONF(NETDEV_CHANGE): veth0: link becomes ready [ 45.566904] 8021q: adding VLAN 0 to HW filter on device team0 [ 45.600187] 8021q: adding VLAN 0 to HW filter on device team0 [ 45.789466] 8021q: adding VLAN 0 to HW filter on device team0 [ 46.850564] hrtimer: interrupt took 34369 ns 2018/09/12 00:40:02 executed programs: 6 [ 48.819755] ================================================================== [ 48.827275] BUG: KASAN: use-after-free in cma_bind_port+0x35d/0x420 [ 48.833667] Read of size 2 at addr ffff8801b7b056a0 by task syz-executor3/7271 [ 48.841002] [ 48.842635] CPU: 1 PID: 7271 Comm: syz-executor3 Not tainted 4.19.0-rc3+ #231 [ 48.849912] Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011 [ 48.859247] Call Trace: [ 48.861831] dump_stack+0x1c4/0x2b4 [ 48.865466] ? dump_stack_print_info.cold.2+0x52/0x52 [ 48.870660] ? printk+0xa7/0xcf [ 48.873948] ? kmsg_dump_rewind_nolock+0xe4/0xe4 [ 48.878696] print_address_description.cold.8+0x9/0x1ff [ 48.884063] kasan_report.cold.9+0x242/0x309 [ 48.888456] ? cma_bind_port+0x35d/0x420 [ 48.892503] __asan_report_load2_noabort+0x14/0x20 [ 48.897423] cma_bind_port+0x35d/0x420 [ 48.901297] ? rcu_read_unlock+0xa0/0xa0 [ 48.905343] ? rdma_leave_multicast+0x6a0/0x6a0 [ 48.910018] cma_alloc_port+0x115/0x180 [ 48.914113] rdma_bind_addr+0x1765/0x23d0 [ 48.918260] ? lock_release+0x970/0x970 [ 48.922254] ? cma_ndev_work_handler+0x1b0/0x1b0 [ 48.926994] ? graph_lock+0x170/0x170 [ 48.930779] ? ucma_get_ctx+0x1f/0x160 [ 48.934654] rdma_resolve_addr+0x4e2/0x2770 [ 48.938978] ? find_held_lock+0x36/0x1c0 [ 48.943034] ? rdma_bind_addr+0x23d0/0x23d0 [ 48.947340] ? lock_downgrade+0x900/0x900 [ 48.951471] ? plist_requeue+0x620/0x620 [ 48.955515] ? find_held_lock+0x36/0x1c0 [ 48.959570] ? kasan_check_write+0x14/0x20 [ 48.963801] ? __mutex_unlock_slowpath+0x197/0x8c0 [ 48.968735] ? wait_for_completion+0x8a0/0x8a0 [ 48.973304] ? lock_release+0x970/0x970 [ 48.977270] ? arch_local_save_flags+0x40/0x40 [ 48.981838] ? find_held_lock+0x36/0x1c0 [ 48.985899] ucma_resolve_ip+0x242/0x2a0 [ 48.989973] ? ucma_query+0xb20/0xb20 [ 48.993768] ? __sanitizer_cov_trace_const_cmp8+0x18/0x20 [ 48.999289] ? _copy_from_user+0xdf/0x150 [ 49.003420] ? ucma_query+0xb20/0xb20 [ 49.007210] ucma_write+0x336/0x420 [ 49.010833] ? ucma_close_id+0x60/0x60 [ 49.014712] __vfs_write+0x119/0x9f0 [ 49.018709] ? debug_lockdep_rcu_enabled+0x77/0x90 [ 49.023643] ? ucma_close_id+0x60/0x60 [ 49.027515] ? kernel_read+0x120/0x120 [ 49.031390] ? apparmor_path_rmdir+0x30/0x30 [ 49.035785] ? trace_hardirqs_on+0xbd/0x310 [ 49.040091] ? kasan_check_read+0x11/0x20 [ 49.044234] ? fsnotify_first_mark+0x350/0x350 [ 49.048805] ? apparmor_file_permission+0x24/0x30 [ 49.053634] ? __sanitizer_cov_trace_const_cmp4+0x16/0x20 [ 49.059159] ? security_file_permission+0x1c2/0x230 [ 49.064164] ? rw_verify_area+0x118/0x360 [ 49.068299] vfs_write+0x1fc/0x560 [ 49.071828] ksys_write+0x101/0x260 [ 49.075443] ? __ia32_sys_read+0xb0/0xb0 [ 49.079487] ? __bpf_trace_preemptirq_template+0x30/0x30 [ 49.084936] __x64_sys_write+0x73/0xb0 [ 49.088949] do_syscall_64+0x1b9/0x820 [ 49.092822] ? entry_SYSCALL_64_after_hwframe+0x3e/0xbe [ 49.098170] ? syscall_return_slowpath+0x5e0/0x5e0 [ 49.103083] ? trace_hardirqs_off_thunk+0x1a/0x1c [ 49.107981] ? trace_hardirqs_on_caller+0x310/0x310 [ 49.112989] ? prepare_exit_to_usermode+0x291/0x3b0 [ 49.117996] ? trace_hardirqs_off_thunk+0x1a/0x1c [ 49.122828] entry_SYSCALL_64_after_hwframe+0x49/0xbe [ 49.128000] RIP: 0033:0x4572d9 [ 49.131176] Code: fd b4 fb ff c3 66 2e 0f 1f 84 00 00 00 00 00 66 90 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 cb b4 fb ff c3 66 2e 0f 1f 84 00 00 00 00 [ 49.150062] RSP: 002b:00007f71074b0c78 EFLAGS: 00000246 ORIG_RAX: 0000000000000001 [ 49.157753] RAX: ffffffffffffffda RBX: 00007f71074b16d4 RCX: 00000000004572d9 [ 49.165003] RDX: 0000000000000048 RSI: 0000000020000240 RDI: 0000000000000008 [ 49.172256] RBP: 00000000009300a0 R08: 0000000000000000 R09: 0000000000000000 [ 49.179508] R10: 0000000000000000 R11: 0000000000000246 R12: 00000000ffffffff [ 49.186758] R13: 00000000004d83c0 R14: 00000000004c1e90 R15: 0000000000000000 [ 49.194020] [ 49.195629] Allocated by task 7285: [ 49.199241] save_stack+0x43/0xd0 [ 49.202677] kasan_kmalloc+0xc7/0xe0 [ 49.206375] kmem_cache_alloc_trace+0x152/0x750 [ 49.211028] __rdma_create_id+0xdf/0x790 [ 49.215071] ucma_create_id+0x39b/0x990 [ 49.219051] ucma_write+0x336/0x420 [ 49.222670] __vfs_write+0x119/0x9f0 [ 49.226376] vfs_write+0x1fc/0x560 [ 49.229901] ksys_write+0x101/0x260 [ 49.233511] __x64_sys_write+0x73/0xb0 [ 49.237385] do_syscall_64+0x1b9/0x820 [ 49.241257] entry_SYSCALL_64_after_hwframe+0x49/0xbe [ 49.246422] [ 49.248041] Freed by task 7261: [ 49.251301] save_stack+0x43/0xd0 [ 49.254739] __kasan_slab_free+0x102/0x150 [ 49.258969] kasan_slab_free+0xe/0x10 [ 49.262778] kfree+0xcf/0x230 [ 49.265866] rdma_destroy_id+0x835/0xcc0 [ 49.269909] ucma_close+0x100/0x300 [ 49.273562] __fput+0x385/0xa30 [ 49.276827] ____fput+0x15/0x20 [ 49.280088] task_work_run+0x1e8/0x2a0 [ 49.283975] exit_to_usermode_loop+0x318/0x380 [ 49.288542] do_syscall_64+0x6be/0x820 [ 49.292411] entry_SYSCALL_64_after_hwframe+0x49/0xbe [ 49.297576] [ 49.299186] The buggy address belongs to the object at ffff8801b7b05680 [ 49.299186] which belongs to the cache kmalloc-2048 of size 2048 [ 49.312023] The buggy address is located 32 bytes inside of [ 49.312023] 2048-byte region [ffff8801b7b05680, ffff8801b7b05e80) [ 49.323889] The buggy address belongs to the page: [ 49.328821] page:ffffea0006dec100 count:1 mapcount:0 mapping:ffff8801da800c40 index:0xffff8801b7b04580 compound_mapcount: 0 [ 49.340098] flags: 0x2fffc0000008100(slab|head) [ 49.344754] raw: 02fffc0000008100 ffffea0006debf88 ffffea0006deb708 ffff8801da800c40 [ 49.352619] raw: ffff8801b7b04580 ffff8801b7b04580 0000000100000002 0000000000000000 [ 49.360474] page dumped because: kasan: bad access detected [ 49.366157] [ 49.367767] Memory state around the buggy address: [ 49.372680] ffff8801b7b05580: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb [ 49.380020] ffff8801b7b05600: fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc [ 49.387363] >ffff8801b7b05680: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb [ 49.394700] ^ [ 49.399092] ffff8801b7b05700: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb [ 49.406433] ffff8801b7b05780: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb [ 49.413770] ================================================================== [ 49.421110] Disabling lock debugging due to kernel taint [ 49.437574] Kernel panic - not syncing: panic_on_warn set ... [ 49.437574] [ 49.444963] CPU: 0 PID: 7271 Comm: syz-executor3 Tainted: G B 4.19.0-rc3+ #231 [ 49.453641] Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011 [ 49.462990] Call Trace: [ 49.465582] dump_stack+0x1c4/0x2b4 [ 49.469215] ? dump_stack_print_info.cold.2+0x52/0x52 [ 49.474398] panic+0x238/0x4e7 [ 49.477582] ? add_taint.cold.5+0x16/0x16 [ 49.481731] ? preempt_schedule+0x4d/0x60 [ 49.485879] ? ___preempt_schedule+0x16/0x18 [ 49.490300] ? trace_hardirqs_on+0xb4/0x310 [ 49.494624] kasan_end_report+0x47/0x4f [ 49.498591] kasan_report.cold.9+0x76/0x309 [ 49.502907] ? cma_bind_port+0x35d/0x420 [ 49.506981] __asan_report_load2_noabort+0x14/0x20 [ 49.511903] cma_bind_port+0x35d/0x420 [ 49.515787] ? rcu_read_unlock+0xa0/0xa0 [ 49.519846] ? rdma_leave_multicast+0x6a0/0x6a0 [ 49.524511] cma_alloc_port+0x115/0x180 [ 49.528481] rdma_bind_addr+0x1765/0x23d0 [ 49.532624] ? lock_release+0x970/0x970 [ 49.536611] ? cma_ndev_work_handler+0x1b0/0x1b0 [ 49.541375] ? graph_lock+0x170/0x170 [ 49.545177] ? ucma_get_ctx+0x1f/0x160 [ 49.549069] rdma_resolve_addr+0x4e2/0x2770 [ 49.553397] ? find_held_lock+0x36/0x1c0 [ 49.557459] ? rdma_bind_addr+0x23d0/0x23d0 [ 49.561779] ? lock_downgrade+0x900/0x900 [ 49.565922] ? plist_requeue+0x620/0x620 [ 49.569991] ? find_held_lock+0x36/0x1c0 [ 49.574061] ? kasan_check_write+0x14/0x20 [ 49.578300] ? __mutex_unlock_slowpath+0x197/0x8c0 [ 49.583259] ? wait_for_completion+0x8a0/0x8a0 [ 49.587843] ? lock_release+0x970/0x970 [ 49.591815] ? arch_local_save_flags+0x40/0x40 [ 49.596393] ? find_held_lock+0x36/0x1c0 [ 49.600465] ucma_resolve_ip+0x242/0x2a0 [ 49.604524] ? ucma_query+0xb20/0xb20 [ 49.608342] ? __sanitizer_cov_trace_const_cmp8+0x18/0x20 [ 49.613878] ? _copy_from_user+0xdf/0x150 [ 49.618020] ? ucma_query+0xb20/0xb20 [ 49.621820] ucma_write+0x336/0x420 [ 49.625440] ? ucma_close_id+0x60/0x60 [ 49.629331] __vfs_write+0x119/0x9f0 [ 49.633040] ? debug_lockdep_rcu_enabled+0x77/0x90 [ 49.637962] ? ucma_close_id+0x60/0x60 [ 49.641849] ? kernel_read+0x120/0x120 [ 49.645733] ? apparmor_path_rmdir+0x30/0x30 [ 49.650139] ? trace_hardirqs_on+0xbd/0x310 [ 49.654458] ? kasan_check_read+0x11/0x20 [ 49.658601] ? fsnotify_first_mark+0x350/0x350 [ 49.663184] ? apparmor_file_permission+0x24/0x30 [ 49.668034] ? __sanitizer_cov_trace_const_cmp4+0x16/0x20 [ 49.673596] ? security_file_permission+0x1c2/0x230 [ 49.678625] ? rw_verify_area+0x118/0x360 [ 49.682771] vfs_write+0x1fc/0x560 [ 49.686320] ksys_write+0x101/0x260 [ 49.689946] ? __ia32_sys_read+0xb0/0xb0 [ 49.694009] ? __bpf_trace_preemptirq_template+0x30/0x30 [ 49.699461] __x64_sys_write+0x73/0xb0 [ 49.703348] do_syscall_64+0x1b9/0x820 [ 49.707270] ? entry_SYSCALL_64_after_hwframe+0x3e/0xbe [ 49.712631] ? syscall_return_slowpath+0x5e0/0x5e0 [ 49.717589] ? trace_hardirqs_off_thunk+0x1a/0x1c [ 49.722429] ? trace_hardirqs_on_caller+0x310/0x310 [ 49.727442] ? prepare_exit_to_usermode+0x291/0x3b0 [ 49.732459] ? trace_hardirqs_off_thunk+0x1a/0x1c [ 49.737304] entry_SYSCALL_64_after_hwframe+0x49/0xbe [ 49.742485] RIP: 0033:0x4572d9 [ 49.745678] Code: fd b4 fb ff c3 66 2e 0f 1f 84 00 00 00 00 00 66 90 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 cb b4 fb ff c3 66 2e 0f 1f 84 00 00 00 00 [ 49.764572] RSP: 002b:00007f71074b0c78 EFLAGS: 00000246 ORIG_RAX: 0000000000000001 [ 49.772276] RAX: ffffffffffffffda RBX: 00007f71074b16d4 RCX: 00000000004572d9 [ 49.779540] RDX: 0000000000000048 RSI: 0000000020000240 RDI: 0000000000000008 [ 49.786804] RBP: 00000000009300a0 R08: 0000000000000000 R09: 0000000000000000 [ 49.794069] R10: 0000000000000000 R11: 0000000000000246 R12: 00000000ffffffff [ 49.801328] R13: 00000000004d83c0 R14: 00000000004c1e90 R15: 0000000000000000 [ 49.809022] Dumping ftrace buffer: [ 49.812552] (ftrace buffer empty) [ 49.816760] Kernel Offset: disabled [ 49.820377] Rebooting in 86400 seconds..