[bug report] NVMe/IB: kmemleak observed on 5.17.0-rc5 with nvme-rdma testing

[Yi Zhang]

On Tue, Mar 8, 2022 at 11:51 PM Max Gurtovoy <mgurtovoy at nvidia.com> wrote:
>
> Hi Yi Zhang,
>
> Please send the commands to repro.
>
> I run the following with no success to repro:
>
> for i in `seq 100`; do echo $i &&  cat /sys/kernel/debug/kmemleak &&
> echo clear > /sys/kernel/debug/kmemleak && nvme reset /dev/nvme2 &&
> sleep 5 && echo scan > /sys/kernel/debug/kmemleak ; done

Hi Max
Sorry, I should add more details when I report it.
The kmemleak observed when I was reproducing the "nvme reset" timeout
issue we discussed before[1], and the cmd I used are[2]

[1]
https://lore.kernel.org/linux-nvme/CAHj4cs_ir917u7Up5PBfwWpZtnVLey69pXXNjFNAjbqQ5vwU0w@mail.gmail.com/T/#m5e6dcc434fc1925b18047c348226cfbc48ffbd14
[2]
# nvme connect to target
# nvme reset /dev/nvme0
# nvme disconnect-all
# sleep 10
# echo scan > /sys/kernel/debug/kmemleak
# sleep 60
# cat /sys/kernel/debug/kmemleak


>
> -Max.
>
> On 2/21/2022 1:37 PM, Yi Zhang wrote:
> > Hello
> >
> > Below kmemleak triggered when I do nvme connect/reset/disconnect
> > operations on latest 5.17.0-rc5, pls check it.
> >
> > # cat /sys/kernel/debug/kmemleak
> > unreferenced object 0xffff8883e398bc00 (size 192):
> >    comm "nvme", pid 2632, jiffies 4295317772 (age 2951.476s)
> >    hex dump (first 32 bytes):
> >      80 50 84 a3 ff ff ff ff 70 d4 12 67 81 88 ff ff  .P......p..g....
> >      01 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00  ................
> >    backtrace:
> >      [<00000000ecf84f29>] kmem_cache_alloc_trace+0x10e/0x220
> >      [<0000000099bbcbaa>] blk_iolatency_init+0x4e/0x380
> >      [<00000000e7a59176>] blkcg_init_queue+0x12e/0x610
> >      [<00000000aade682c>] blk_alloc_queue+0x400/0x840
> >      [<000000007ed43824>] blk_mq_init_queue_data+0x6a/0x100
> >      [<00000000cbff6d39>] nvme_rdma_setup_ctrl+0x4ca/0x15f0 [nvme_rdma]
> >      [<00000000a309d26c>] nvme_rdma_create_ctrl+0x7e5/0xa9f [nvme_rdma]
> >      [<000000007d8b5cca>] nvmf_dev_write+0x44e/0xa39 [nvme_fabrics]
> >      [<0000000031d8624b>] vfs_write+0x17e/0x9a0
> >      [<00000000471d7945>] ksys_write+0xf1/0x1c0
> >      [<00000000a963bc79>] do_syscall_64+0x3a/0x80
> >      [<0000000005154fc2>] entry_SYSCALL_64_after_hwframe+0x44/0xae
> > unreferenced object 0xffff8883e398a700 (size 192):
> >    comm "nvme", pid 2632, jiffies 4295317782 (age 2951.466s)
> >    hex dump (first 32 bytes):
> >      80 50 84 a3 ff ff ff ff 60 c8 12 67 81 88 ff ff  .P......`..g....
> >      01 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00  ................
> >    backtrace:
> >      [<00000000ecf84f29>] kmem_cache_alloc_trace+0x10e/0x220
> >      [<0000000099bbcbaa>] blk_iolatency_init+0x4e/0x380
> >      [<00000000e7a59176>] blkcg_init_queue+0x12e/0x610
> >      [<00000000aade682c>] blk_alloc_queue+0x400/0x840
> >      [<000000007ed43824>] blk_mq_init_queue_data+0x6a/0x100
> >      [<000000004f80b965>] nvme_rdma_setup_ctrl+0xf37/0x15f0 [nvme_rdma]
> >      [<00000000a309d26c>] nvme_rdma_create_ctrl+0x7e5/0xa9f [nvme_rdma]
> >      [<000000007d8b5cca>] nvmf_dev_write+0x44e/0xa39 [nvme_fabrics]
> >      [<0000000031d8624b>] vfs_write+0x17e/0x9a0
> >      [<00000000471d7945>] ksys_write+0xf1/0x1c0
> >      [<00000000a963bc79>] do_syscall_64+0x3a/0x80
> >      [<0000000005154fc2>] entry_SYSCALL_64_after_hwframe+0x44/0xae
> > unreferenced object 0xffff8894253d9d00 (size 192):
> >    comm "nvme", pid 2632, jiffies 4295331915 (age 2937.333s)
> >    hex dump (first 32 bytes):
> >      80 50 84 a3 ff ff ff ff 80 e0 12 67 81 88 ff ff  .P.........g....
> >      01 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00  ................
> >    backtrace:
> >      [<00000000ecf84f29>] kmem_cache_alloc_trace+0x10e/0x220
> >      [<0000000099bbcbaa>] blk_iolatency_init+0x4e/0x380
> >      [<00000000e7a59176>] blkcg_init_queue+0x12e/0x610
> >      [<00000000aade682c>] blk_alloc_queue+0x400/0x840
> >      [<000000007ed43824>] blk_mq_init_queue_data+0x6a/0x100
> >      [<000000009f9abba5>] nvme_rdma_setup_ctrl.cold.70+0x5ee/0xb01 [nvme_rdma]
> >      [<00000000a309d26c>] nvme_rdma_create_ctrl+0x7e5/0xa9f [nvme_rdma]
> >      [<000000007d8b5cca>] nvmf_dev_write+0x44e/0xa39 [nvme_fabrics]
> >      [<0000000031d8624b>] vfs_write+0x17e/0x9a0
> >      [<00000000471d7945>] ksys_write+0xf1/0x1c0
> >      [<00000000a963bc79>] do_syscall_64+0x3a/0x80
> >      [<0000000005154fc2>] entry_SYSCALL_64_after_hwframe+0x44/0xae
> >
> >
> >
>


-- 
Best Regards,
  Yi Zhang