From: Mirsad Todorovac <mirsad.todorovac@alu.unizg.hr>
To: linux-modules@vger.kernel.org
Cc: Luis Chamberlain <mcgrof@kernel.org>,
Greg Kroah-Hartman <gregkh@linuxfoundation.org>,
"Rafael J. Wysocki" <rafael@kernel.org>,
linux-kernel@vger.kernel.org
Subject: [BUG][KMEMLEAK] modprobe: unreferenced object (size 16)
Date: Sat, 23 Mar 2024 21:39:41 +0100 [thread overview]
Message-ID: <662c65f1-cb22-4916-bcd4-257cb574b207@alu.unizg.hr> (raw)
Hi,
On the Ubuntu 22.04 LTS system, with recent iproute2-next toolsvand build 6.8-11743-ga4145ce1e7bc,
kmemleak system reported the following memory leaks:
unreferenced object 0xffff9da692e7e920 (size 16):
comm "modprobe", pid 2248188, jiffies 4358296226
hex dump (first 16 bytes):
68 6d 6d 5f 64 6d 69 72 72 6f 72 30 00 00 00 00 hmm_dmirror0....
backtrace (crc d64cce1d):
kmemleak_alloc (/home/marvin/linux/kernel/linux_torvalds/mm/kmemleak.c:1045)
__kmalloc_node_track_caller (/home/marvin/linux/kernel/linux_torvalds/./include/linux/kmemleak.h:42 /home/marvin/linux/kernel/linux_torvalds/mm/slub.c:3802 /home/marvin/linux/kernel/linux_torvalds/mm/slub.c:3845 /home/marvin/linux/kernel/linux_torvalds/mm/slub.c:3965 /home/marvin/linux/kernel/linux_torvalds/mm/slub.c:3986)
kvasprintf (/home/marvin/linux/kernel/linux_torvalds/lib/kasprintf.c:25)
kvasprintf_const (/home/marvin/linux/kernel/linux_torvalds/lib/kasprintf.c:50)
kobject_set_name_vargs (/home/marvin/linux/kernel/linux_torvalds/lib/kobject.c:274)
dev_set_name (/home/marvin/linux/kernel/linux_torvalds/drivers/base/core.c:3445)
drr_init (/home/marvin/linux/kernel/linux_torvalds/net/sched/sch_drr.c:233) sch_drr
do_one_initcall (/home/marvin/linux/kernel/linux_torvalds/init/main.c:1238)
do_init_module (/home/marvin/linux/kernel/linux_torvalds/kernel/module/main.c:2538)
load_module (/home/marvin/linux/kernel/linux_torvalds/kernel/module/main.c:3001)
init_module_from_file (/home/marvin/linux/kernel/linux_torvalds/kernel/module/main.c:3168)
idempotent_init_module (/home/marvin/linux/kernel/linux_torvalds/kernel/module/main.c:3185)
__x64_sys_finit_module (/home/marvin/linux/kernel/linux_torvalds/./include/linux/file.h:47 /home/marvin/linux/kernel/linux_torvalds/kernel/module/main.c:3207 /home/marvin/linux/kernel/linux_torvalds/kernel/module/main.c:3189 /home/marvin/linux/kernel/linux_torvalds/kernel/module/main.c:3189)
do_syscall_64 (/home/marvin/linux/kernel/linux_torvalds/arch/x86/entry/common.c:52 /home/marvin/linux/kernel/linux_torvalds/arch/x86/entry/common.c:83)
entry_SYSCALL_64_after_hwframe (/home/marvin/linux/kernel/linux_torvalds/arch/x86/entry/entry_64.S:129)
unreferenced object 0xffff9d9b0080bf00 (size 256):
comm "modprobe", pid 2248188, jiffies 4358296226
hex dump (first 32 bytes):
00 00 00 00 00 00 00 00 08 bf 80 00 9b 9d ff ff ................
08 bf 80 00 9b 9d ff ff 00 d9 80 af ff ff ff ff ................
backtrace (crc 31d67378):
kmemleak_alloc (/home/marvin/linux/kernel/linux_torvalds/mm/kmemleak.c:1045)
kmalloc_trace (/home/marvin/linux/kernel/linux_torvalds/./include/linux/kmemleak.h:42 /home/marvin/linux/kernel/linux_torvalds/mm/slub.c:3802 /home/marvin/linux/kernel/linux_torvalds/mm/slub.c:3845 /home/marvin/linux/kernel/linux_torvalds/mm/slub.c:3992)
device_add (/home/marvin/linux/kernel/linux_torvalds/drivers/base/core.c:3484 /home/marvin/linux/kernel/linux_torvalds/drivers/base/core.c:3535)
cdev_device_add (/home/marvin/linux/kernel/linux_torvalds/fs/char_dev.c:557)
drr_init (/home/marvin/linux/kernel/linux_torvalds/./include/linux/list.h:195 /home/marvin/linux/kernel/linux_torvalds/./include/linux/list.h:218 /home/marvin/linux/kernel/linux_torvalds/./include/linux/list.h:229 /home/marvin/linux/kernel/linux_torvalds/net/sched/sch_drr.c:434) sch_drr
do_one_initcall (/home/marvin/linux/kernel/linux_torvalds/init/main.c:1238)
do_init_module (/home/marvin/linux/kernel/linux_torvalds/kernel/module/main.c:2538)
load_module (/home/marvin/linux/kernel/linux_torvalds/kernel/module/main.c:3001)
init_module_from_file (/home/marvin/linux/kernel/linux_torvalds/kernel/module/main.c:3168)
idempotent_init_module (/home/marvin/linux/kernel/linux_torvalds/kernel/module/main.c:3185)
__x64_sys_finit_module (/home/marvin/linux/kernel/linux_torvalds/./include/linux/file.h:47 /home/marvin/linux/kernel/linux_torvalds/kernel/module/main.c:3207 /home/marvin/linux/kernel/linux_torvalds/kernel/module/main.c:3189 /home/marvin/linux/kernel/linux_torvalds/kernel/module/main.c:3189)
do_syscall_64 (/home/marvin/linux/kernel/linux_torvalds/arch/x86/entry/common.c:52 /home/marvin/linux/kernel/linux_torvalds/arch/x86/entry/common.c:83)
entry_SYSCALL_64_after_hwframe (/home/marvin/linux/kernel/linux_torvalds/arch/x86/entry/entry_64.S:129)
unreferenced object 0xffff9da692e7ee90 (size 16):
comm "modprobe", pid 2248188, jiffies 4358296235
hex dump (first 16 bytes):
68 6d 6d 5f 64 6d 69 72 72 6f 72 31 00 00 00 00 hmm_dmirror1....
backtrace (crc eb2ce7ad):
kmemleak_alloc (/home/marvin/linux/kernel/linux_torvalds/mm/kmemleak.c:1045)
__kmalloc_node_track_caller (/home/marvin/linux/kernel/linux_torvalds/./include/linux/kmemleak.h:42 /home/marvin/linux/kernel/linux_torvalds/mm/slub.c:3802 /home/marvin/linux/kernel/linux_torvalds/mm/slub.c:3845 /home/marvin/linux/kernel/linux_torvalds/mm/slub.c:3965 /home/marvin/linux/kernel/linux_torvalds/mm/slub.c:3986)
kvasprintf (/home/marvin/linux/kernel/linux_torvalds/lib/kasprintf.c:25)
kvasprintf_const (/home/marvin/linux/kernel/linux_torvalds/lib/kasprintf.c:50)
kobject_set_name_vargs (/home/marvin/linux/kernel/linux_torvalds/lib/kobject.c:274)
dev_set_name (/home/marvin/linux/kernel/linux_torvalds/drivers/base/core.c:3445)
drr_init (/home/marvin/linux/kernel/linux_torvalds/net/sched/sch_drr.c:233) sch_drr
do_one_initcall (/home/marvin/linux/kernel/linux_torvalds/init/main.c:1238)
do_init_module (/home/marvin/linux/kernel/linux_torvalds/kernel/module/main.c:2538)
load_module (/home/marvin/linux/kernel/linux_torvalds/kernel/module/main.c:3001)
init_module_from_file (/home/marvin/linux/kernel/linux_torvalds/kernel/module/main.c:3168)
idempotent_init_module (/home/marvin/linux/kernel/linux_torvalds/kernel/module/main.c:3185)
__x64_sys_finit_module (/home/marvin/linux/kernel/linux_torvalds/./include/linux/file.h:47 /home/marvin/linux/kernel/linux_torvalds/kernel/module/main.c:3207 /home/marvin/linux/kernel/linux_torvalds/kernel/module/main.c:3189 /home/marvin/linux/kernel/linux_torvalds/kernel/module/main.c:3189)
do_syscall_64 (/home/marvin/linux/kernel/linux_torvalds/arch/x86/entry/common.c:52 /home/marvin/linux/kernel/linux_torvalds/arch/x86/entry/common.c:83)
entry_SYSCALL_64_after_hwframe (/home/marvin/linux/kernel/linux_torvalds/arch/x86/entry/entry_64.S:129)
unreferenced object 0xffff9d9b0080be00 (size 256):
comm "modprobe", pid 2248188, jiffies 4358296235
hex dump (first 32 bytes):
00 00 00 00 00 00 00 00 08 be 80 00 9b 9d ff ff ................
08 be 80 00 9b 9d ff ff 00 d9 80 af ff ff ff ff ................
backtrace (crc e1a8857):
kmemleak_alloc (/home/marvin/linux/kernel/linux_torvalds/mm/kmemleak.c:1045)
kmalloc_trace (/home/marvin/linux/kernel/linux_torvalds/./include/linux/kmemleak.h:42 /home/marvin/linux/kernel/linux_torvalds/mm/slub.c:3802 /home/marvin/linux/kernel/linux_torvalds/mm/slub.c:3845 /home/marvin/linux/kernel/linux_torvalds/mm/slub.c:3992)
device_add (/home/marvin/linux/kernel/linux_torvalds/drivers/base/core.c:3484 /home/marvin/linux/kernel/linux_torvalds/drivers/base/core.c:3535)
cdev_device_add (/home/marvin/linux/kernel/linux_torvalds/fs/char_dev.c:557)
drr_init (/home/marvin/linux/kernel/linux_torvalds/./include/linux/list.h:195 /home/marvin/linux/kernel/linux_torvalds/./include/linux/list.h:218 /home/marvin/linux/kernel/linux_torvalds/./include/linux/list.h:229 /home/marvin/linux/kernel/linux_torvalds/net/sched/sch_drr.c:434) sch_drr
do_one_initcall (/home/marvin/linux/kernel/linux_torvalds/init/main.c:1238)
do_init_module (/home/marvin/linux/kernel/linux_torvalds/kernel/module/main.c:2538)
load_module (/home/marvin/linux/kernel/linux_torvalds/kernel/module/main.c:3001)
init_module_from_file (/home/marvin/linux/kernel/linux_torvalds/kernel/module/main.c:3168)
idempotent_init_module (/home/marvin/linux/kernel/linux_torvalds/kernel/module/main.c:3185)
__x64_sys_finit_module (/home/marvin/linux/kernel/linux_torvalds/./include/linux/file.h:47 /home/marvin/linux/kernel/linux_torvalds/kernel/module/main.c:3207 /home/marvin/linux/kernel/linux_torvalds/kernel/module/main.c:3189 /home/marvin/linux/kernel/linux_torvalds/kernel/module/main.c:3189)
do_syscall_64 (/home/marvin/linux/kernel/linux_torvalds/arch/x86/entry/common.c:52 /home/marvin/linux/kernel/linux_torvalds/arch/x86/entry/common.c:83)
entry_SYSCALL_64_after_hwframe (/home/marvin/linux/kernel/linux_torvalds/arch/x86/entry/entry_64.S:129)
Unless this is a false positive (which I am unable to judge), I hope this will help catch the leak.
Best regards,
Mirsad Todorovac
reply other threads:[~2024-03-23 20:40 UTC|newest]
Thread overview: [no followups] expand[flat|nested] mbox.gz Atom feed
Reply instructions:
You may reply publicly to this message via plain-text email
using any one of the following methods:
* Save the following mbox file, import it into your mail client,
and reply-to-all from there: mbox
Avoid top-posting and favor interleaved quoting:
https://en.wikipedia.org/wiki/Posting_style#Interleaved_style
* Reply using the --to, --cc, and --in-reply-to
switches of git-send-email(1):
git send-email \
--in-reply-to=662c65f1-cb22-4916-bcd4-257cb574b207@alu.unizg.hr \
--to=mirsad.todorovac@alu.unizg.hr \
--cc=gregkh@linuxfoundation.org \
--cc=linux-kernel@vger.kernel.org \
--cc=linux-modules@vger.kernel.org \
--cc=mcgrof@kernel.org \
--cc=rafael@kernel.org \
/path/to/YOUR_REPLY
https://kernel.org/pub/software/scm/git/docs/git-send-email.html
* If your mail client supports setting the In-Reply-To header
via mailto: links, try the mailto: link
Be sure your reply has a Subject: header at the top and a blank line
before the message body.
This is an external index of several public inboxes,
see mirroring instructions on how to clone and mirror
all data and code used by this external index.