[bug report] kmemleak observed during blktests nvme-tcp

[Yi Zhang]

Hello

Below kmemleak observed after blktests nvme-tcp, pls help check it, thanks.

commit: linux-block/for-next
aaf9cff31abe (origin/for-next) Merge branch 'for-6.4/io_uring' into for-next

unreferenced object 0xffff88821f0cc880 (size 32):
  comm "kworker/1:2H", pid 3067, jiffies 4295825061 (age 12918.254s)
  hex dump (first 32 bytes):
    82 0c 38 08 00 ea ff ff 00 00 00 00 00 10 00 00  ..8.............
    00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00  ................
  backtrace:
    [<ffffffff86f646ab>] __kmalloc+0x4b/0x190
    [<ffffffff8776d0bf>] sgl_alloc_order+0x7f/0x360
    [<ffffffffc0ba9875>] 0xffffffffc0ba9875
    [<ffffffffc0bb068f>] 0xffffffffc0bb068f
    [<ffffffffc0bb2038>] 0xffffffffc0bb2038
    [<ffffffffc0bb257c>] 0xffffffffc0bb257c
    [<ffffffffc0bb2de3>] 0xffffffffc0bb2de3
    [<ffffffff86897f49>] process_one_work+0x8b9/0x1550
    [<ffffffff8689919c>] worker_thread+0x5ac/0xed0
    [<ffffffff868b2222>] kthread+0x2a2/0x340
    [<ffffffff866063ac>] ret_from_fork+0x2c/0x50
unreferenced object 0xffff88823abb7c00 (size 512):
  comm "nvme", pid 6312, jiffies 4295856007 (age 12887.309s)
  hex dump (first 32 bytes):
    00 00 00 00 ad 4e ad de ff ff ff ff 00 00 00 00  .....N..........
    ff ff ff ff ff ff ff ff a0 53 5f 8e ff ff ff ff  .........S_.....
  backtrace:
    [<ffffffff86f63da7>] kmalloc_trace+0x27/0xe0
    [<ffffffff87d61205>] device_add+0x645/0x12f0
    [<ffffffff871c2a73>] cdev_device_add+0xf3/0x230
    [<ffffffffc09ed7c6>] nvme_init_ctrl+0xbe6/0x1140 [nvme_core]
    [<ffffffffc0b54e0c>] 0xffffffffc0b54e0c
    [<ffffffffc086b177>] 0xffffffffc086b177
    [<ffffffffc086b613>] 0xffffffffc086b613
    [<ffffffff871b41e6>] vfs_write+0x216/0xc60
    [<ffffffff871b5479>] ksys_write+0xf9/0x1d0
    [<ffffffff88ba8f9c>] do_syscall_64+0x5c/0x90
    [<ffffffff88c000aa>] entry_SYSCALL_64_after_hwframe+0x72/0xdc
unreferenced object 0xffff88810ccc9b80 (size 96):
  comm "nvme", pid 6312, jiffies 4295856008 (age 12887.308s)
  hex dump (first 32 bytes):
    00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00  ................
    00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00  ................
  backtrace:
    [<ffffffff86f63da7>] kmalloc_trace+0x27/0xe0
    [<ffffffff87d918e0>] dev_pm_qos_update_user_latency_tolerance+0xe0/0x200
    [<ffffffffc09ed83c>] nvme_init_ctrl+0xc5c/0x1140 [nvme_core]
    [<ffffffffc0b54e0c>] 0xffffffffc0b54e0c
    [<ffffffffc086b177>] 0xffffffffc086b177
    [<ffffffffc086b613>] 0xffffffffc086b613
    [<ffffffff871b41e6>] vfs_write+0x216/0xc60
    [<ffffffff871b5479>] ksys_write+0xf9/0x1d0
    [<ffffffff88ba8f9c>] do_syscall_64+0x5c/0x90
    [<ffffffff88c000aa>] entry_SYSCALL_64_after_hwframe+0x72/0xdc
unreferenced object 0xffff8881d1fdb780 (size 64):
  comm "check", pid 6358, jiffies 4295859851 (age 12883.466s)
  hex dump (first 32 bytes):
    44 48 48 43 2d 31 3a 30 30 3a 4e 46 76 44 6d 75  DHHC-1:00:NFvDmu
    52 58 77 79 54 79 62 57 78 70 43 4a 45 4a 68 36  RXwyTybWxpCJEJh6
  backtrace:
    [<ffffffff86f646ab>] __kmalloc+0x4b/0x190
    [<ffffffffc09fb710>] nvme_ctrl_dhchap_secret_store+0x110/0x350 [nvme_core]
    [<ffffffff873cc848>] kernfs_fop_write_iter+0x358/0x530
    [<ffffffff871b47d2>] vfs_write+0x802/0xc60
    [<ffffffff871b5479>] ksys_write+0xf9/0x1d0
    [<ffffffff88ba8f9c>] do_syscall_64+0x5c/0x90
    [<ffffffff88c000aa>] entry_SYSCALL_64_after_hwframe+0x72/0xdc
unreferenced object 0xffff8881d1fdb600 (size 64):
  comm "check", pid 6358, jiffies 4295859908 (age 12883.409s)
  hex dump (first 32 bytes):
    44 48 48 43 2d 31 3a 30 30 3a 4e 46 76 44 6d 75  DHHC-1:00:NFvDmu
    52 58 77 79 54 79 62 57 78 70 43 4a 45 4a 68 36  RXwyTybWxpCJEJh6
  backtrace:
    [<ffffffff86f646ab>] __kmalloc+0x4b/0x190
    [<ffffffffc09fb710>] nvme_ctrl_dhchap_secret_store+0x110/0x350 [nvme_core]
    [<ffffffff873cc848>] kernfs_fop_write_iter+0x358/0x530
    [<ffffffff871b47d2>] vfs_write+0x802/0xc60
    [<ffffffff871b5479>] ksys_write+0xf9/0x1d0
    [<ffffffff88ba8f9c>] do_syscall_64+0x5c/0x90
    [<ffffffff88c000aa>] entry_SYSCALL_64_after_hwframe+0x72/0xdc

--
Best Regards,
  Yi Zhang