Hi Sebastian, On Tue, 2014-06-17 at 22:59 +0200, Sebastian Herbszt wrote: > Hello, > > I got the following output with > > # modprobe target_core_mod > # modprobe target_core_file > # modprobe tcm_loop > > # mkdir -p /sys/kernel/config/target/core/fileio_0/file0 > # echo 'fd_dev_name=/disk1,fd_dev_size=10485760' > /sys/kernel/config/target/core/fileio_0/file0/control > # echo 1 > /sys/kernel/config/target/core/fileio_0/file0/enable > > # mkdir -p /sys/kernel/config/target/loopback/fc.1/tpgt_0/lun/lun_0 > # ln -s /sys/kernel/config/target/core/fileio_0/file0 /sys/kernel/config/target/loopback/fc.1/tpgt_0/lun/lun_0/file0 > > # rm /sys/kernel/config/target/loopback/fc.1/tpgt_0/lun/lun_0/file0 > # rmdir /sys/kernel/config/target/loopback/fc.1/tpgt_0/lun/lun_0 > # rmdir /sys/kernel/config/target/loopback/fc.1/tpgt_0 > # rmdir /sys/kernel/config/target/loopback/fc.1 > # rmdir /sys/kernel/config/target/loopback > # rmmod tcm_loop > # dmesg > > Sebastian > > [22190.572259] scsi4 : TCM_Loopback > [22196.959666] scsi 4:0:0:0: TCM_Loop I_T Nexus does not exist > [22196.966793] scsi 4:0:0:0: TCM_Loop I_T Nexus does not exist > [22196.974736] scsi 4:0:0:0: TCM_Loop I_T Nexus does not exist > [22196.982696] scsi 4:0:0:0: TCM_Loop I_T Nexus does not exist > [22205.880851] Unable to locate struct scsi_device for 0:0:0 > [22242.980589] kmem_cache_destroy tcm_loop_cmd_cache: Slab cache still has objects > [22242.980704] CPU: 0 PID: 3184 Comm: rmmod Not tainted 3.15.0-2.gc9b3c8c-default #1 > [22242.980711] Hardware name: VMware, Inc. VMware Virtual Platform/440BX Desktop Reference Platform, BIOS 6.00 07/02/2012 > [22242.980722] ffffffffa03c2620 ffffffff815b2ea2 ffff880034b8c140 ffffffff81159579 > [22242.980730] 0000000000000000 ffffffffa03bfa8a ffffffff810cc344 00000000301d1478 > [22242.980735] ffffffffa03c2620 ffff880000000880 ffff8800001abf0c 706f6f6c5f6d6374 > [22242.980741] Call Trace: > [22242.981060] [<ffffffff81004aa6>] dump_trace+0x86/0x330 > [22242.981078] [<ffffffff81004de4>] show_stack_log_lvl+0x94/0x170 > [22242.981088] [<ffffffff810061e1>] show_stack+0x21/0x50 > [22242.981201] [<ffffffff815b2ea2>] dump_stack+0x41/0x51 > [22242.998642] [<ffffffff81159579>] kmem_cache_destroy+0xb9/0xe0 > [22242.998688] [<ffffffffa03bfa8a>] tcm_loop_fabric_exit+0x4b/0x5c1 [tcm_loop] > [22242.998734] [<ffffffff810cc344>] SyS_delete_module+0x154/0x1f0 > [22242.998745] [<ffffffff815c17ed>] system_call_fastpath+0x1a/0x1f > [22242.998759] [<00007f2078e98047>] 0x7f2078e98046 > -- Looks like a tcm_loop_cmd memory leak on error when no loopback I_T nexus has been configured. Here is the bugfix that I'll be including in the next v3.16-rc PULL request. Please confirm on your end. Thanks for reporting! --nab diff --git a/drivers/target/loopback/tcm_loop.c b/drivers/target/loopback/tcm_loop.c index 1f4c015..daa538d 100644 --- a/drivers/target/loopback/tcm_loop.c +++ b/drivers/target/loopback/tcm_loop.c @@ -239,6 +239,7 @@ static void tcm_loop_submission_work(struct work_struct *work) return; out_done: + kmem_cache_free(tcm_loop_cmd_cache, tl_cmd); sc->scsi_done(sc); return; } -- To unsubscribe from this list: send the line "unsubscribe target-devel" in the body of a message to majordomo@xxxxxxxxxxxxxxx More majordomo info at http://vger.kernel.org/majordomo-info.html
