From: Chaitanya Kulkarni <chaitanyak@nvidia.com>
To: "linux-nvme@lists.infradead.org" <linux-nvme@lists.infradead.org>
Subject: Kmemleak on nvme-6.5
Date: Wed, 17 May 2023 05:35:05 +0000 [thread overview]
Message-ID: <6344f121-f3a8-1a13-1024-c43fac23a9d8@nvidia.com> (raw)
Hi,
I've observed following kmemleak on nvme-6.5 with blktests
nvme/003 HEAD:-
nvme (nvme-6.5) # git log
commit 851c23be6fc95a48dbdac864f18be63f9a41e8a8 (HEAD -> nvme-6.5,
origin/nvme-6.5)
Author: Max Gurtovoy <mgurtovoy@nvidia.com>
Date: Tue Apr 25 00:12:42 2023 +0300
nvme: move sysfs code to a dedicated sysfs.c file
+ cat /sys/kernel/debug/kmemleak
unreferenced object 0xffff888114c610c0 (size 96):
comm "insmod", pid 2582, jiffies 4294980741 (age 48.260s)
hex dump (first 32 bytes):
c0 e6 a0 c0 ff ff ff ff 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:
[<00000000430e7112>] kmalloc_trace+0x25/0x90
[<0000000023afbbe3>] class_create+0x21/0x70
[<0000000018569292>] 0xffffffffc0a11039
[<00000000ca4d41aa>] do_one_initcall+0x44/0x220
[<00000000cb8082be>] do_init_module+0x64/0x240
[<000000001b198e51>] __do_sys_finit_module+0xb4/0x130
[<000000003734a6e8>] do_syscall_64+0x3b/0x90
[<000000007e30a8f5>] entry_SYSCALL_64_after_hwframe+0x72/0xdc
unreferenced object 0xffff88810a392a00 (size 512):
comm "insmod", pid 2582, jiffies 4294980741 (age 48.260s)
hex dump (first 32 bytes):
00 2a 39 0a 81 88 ff ff 00 2a 39 0a 81 88 ff ff .*9......*9.....
00 00 00 00 00 00 00 00 a0 b3 37 07 81 88 ff ff ..........7.....
backtrace:
[<00000000430e7112>] kmalloc_trace+0x25/0x90
[<00000000ae172de7>] class_register+0x29/0x130
[<0000000035f86164>] class_create+0x3c/0x70
[<0000000018569292>] 0xffffffffc0a11039
[<00000000ca4d41aa>] do_one_initcall+0x44/0x220
[<00000000cb8082be>] do_init_module+0x64/0x240
[<000000001b198e51>] __do_sys_finit_module+0xb4/0x130
[<000000003734a6e8>] do_syscall_64+0x3b/0x90
[<000000007e30a8f5>] entry_SYSCALL_64_after_hwframe+0x72/0xdc
unreferenced object 0xffff88810737b3a0 (size 16):
comm "insmod", pid 2582, jiffies 4294980741 (age 48.260s)
hex dump (first 16 bytes):
6e 76 6d 65 2d 66 61 62 72 69 63 73 00 88 ff ff nvme-fabrics....
backtrace:
[<00000000e84e4b63>] __kmalloc_node_track_caller+0x4c/0x130
[<000000000198ce20>] kstrdup+0x33/0x60
[<0000000061fcf661>] kobject_set_name_vargs+0x1e/0x90
[<000000008c34e0dd>] kobject_set_name+0x4e/0x70
[<00000000ae7f3042>] class_register+0x94/0x130
[<0000000035f86164>] class_create+0x3c/0x70
[<0000000018569292>] 0xffffffffc0a11039
[<00000000ca4d41aa>] do_one_initcall+0x44/0x220
[<00000000cb8082be>] do_init_module+0x64/0x240
[<000000001b198e51>] __do_sys_finit_module+0xb4/0x130
[<000000003734a6e8>] do_syscall_64+0x3b/0x90
[<000000007e30a8f5>] entry_SYSCALL_64_after_hwframe+0x72/0xdc
For me it is not that straight forward to reproduce that.
Thought I should document it.
-ck
next reply other threads:[~2023-05-17 5:35 UTC|newest]
Thread overview: 5+ messages / expand[flat|nested] mbox.gz Atom feed top
2023-05-17 5:35 Chaitanya Kulkarni [this message]
2023-05-17 7:47 ` Kmemleak on nvme-6.5 Sagi Grimberg
2023-05-17 7:51 ` Chaitanya Kulkarni
2023-06-04 6:38 ` Chaitanya Kulkarni
2023-06-04 6:42 ` Chaitanya Kulkarni
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