From: syzbot <syzbot+3f2d46b6e62b8dd546d3@syzkaller.appspotmail.com>
To: kartikey406@gmail.com, linux-kernel@vger.kernel.org,
syzkaller-bugs@googlegroups.com
Subject: Re: [syzbot] [hams?] memory leak in nr_add_node
Date: Fri, 16 Jan 2026 06:04:03 -0800 [thread overview]
Message-ID: <696a4553.050a0220.58bed.0050.GAE@google.com> (raw)
In-Reply-To: <20260116125146.1226609-1-kartikey406@gmail.com>
Hello,
syzbot has tested the proposed patch but the reproducer is still triggering an issue:
memory leak in nr_add_node
BUG: memory leak
unreferenced object 0xffff888110bb0040 (size 64):
comm "syz.0.17", pid 6760, jiffies 4294948943
hex dump (first 32 bytes):
00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 ................
cc cc cc cc cc cc 02 00 00 00 00 00 00 00 00 00 ................
backtrace (crc ccec3325):
kmemleak_alloc_recursive include/linux/kmemleak.h:44 [inline]
slab_post_alloc_hook mm/slub.c:4958 [inline]
slab_alloc_node mm/slub.c:5263 [inline]
__kmalloc_cache_noprof+0x3b2/0x570 mm/slub.c:5771
kmalloc_noprof include/linux/slab.h:957 [inline]
nr_add_node+0x7f3/0x1600 net/netrom/nr_route.c:153
nr_rt_ioctl+0xaec/0x1410 net/netrom/nr_route.c:688
nr_ioctl+0x11f/0x1a0 net/netrom/af_netrom.c:1257
sock_do_ioctl+0x84/0x1a0 net/socket.c:1254
sock_ioctl+0x149/0x480 net/socket.c:1375
vfs_ioctl fs/ioctl.c:51 [inline]
__do_sys_ioctl fs/ioctl.c:597 [inline]
__se_sys_ioctl fs/ioctl.c:583 [inline]
__x64_sys_ioctl+0xf4/0x140 fs/ioctl.c:583
do_syscall_x64 arch/x86/entry/syscall_64.c:63 [inline]
do_syscall_64+0xa4/0xf80 arch/x86/entry/syscall_64.c:94
entry_SYSCALL_64_after_hwframe+0x77/0x7f
BUG: memory leak
unreferenced object 0xffff888110bb0200 (size 64):
comm "syz.0.18", pid 6762, jiffies 4294948964
hex dump (first 32 bytes):
00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 ................
cc cc cc cc cc cc 02 00 00 00 00 00 00 00 00 00 ................
backtrace (crc bb72e1d5):
kmemleak_alloc_recursive include/linux/kmemleak.h:44 [inline]
slab_post_alloc_hook mm/slub.c:4958 [inline]
slab_alloc_node mm/slub.c:5263 [inline]
__kmalloc_cache_noprof+0x3b2/0x570 mm/slub.c:5771
kmalloc_noprof include/linux/slab.h:957 [inline]
nr_add_node+0x7f3/0x1600 net/netrom/nr_route.c:153
nr_rt_ioctl+0xaec/0x1410 net/netrom/nr_route.c:688
nr_ioctl+0x11f/0x1a0 net/netrom/af_netrom.c:1257
sock_do_ioctl+0x84/0x1a0 net/socket.c:1254
sock_ioctl+0x149/0x480 net/socket.c:1375
vfs_ioctl fs/ioctl.c:51 [inline]
__do_sys_ioctl fs/ioctl.c:597 [inline]
__se_sys_ioctl fs/ioctl.c:583 [inline]
__x64_sys_ioctl+0xf4/0x140 fs/ioctl.c:583
do_syscall_x64 arch/x86/entry/syscall_64.c:63 [inline]
do_syscall_64+0xa4/0xf80 arch/x86/entry/syscall_64.c:94
entry_SYSCALL_64_after_hwframe+0x77/0x7f
BUG: memory leak
unreferenced object 0xffff88810e304200 (size 64):
comm "syz.0.19", pid 6764, jiffies 4294948984
hex dump (first 32 bytes):
00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 ................
cc cc cc cc cc cc 02 00 00 00 00 00 00 00 00 00 ................
backtrace (crc 20d7adba):
kmemleak_alloc_recursive include/linux/kmemleak.h:44 [inline]
slab_post_alloc_hook mm/slub.c:4958 [inline]
slab_alloc_node mm/slub.c:5263 [inline]
__kmalloc_cache_noprof+0x3b2/0x570 mm/slub.c:5771
kmalloc_noprof include/linux/slab.h:957 [inline]
nr_add_node+0x7f3/0x1600 net/netrom/nr_route.c:153
nr_rt_ioctl+0xaec/0x1410 net/netrom/nr_route.c:688
nr_ioctl+0x11f/0x1a0 net/netrom/af_netrom.c:1257
sock_do_ioctl+0x84/0x1a0 net/socket.c:1254
sock_ioctl+0x149/0x480 net/socket.c:1375
vfs_ioctl fs/ioctl.c:51 [inline]
__do_sys_ioctl fs/ioctl.c:597 [inline]
__se_sys_ioctl fs/ioctl.c:583 [inline]
__x64_sys_ioctl+0xf4/0x140 fs/ioctl.c:583
do_syscall_x64 arch/x86/entry/syscall_64.c:63 [inline]
do_syscall_64+0xa4/0xf80 arch/x86/entry/syscall_64.c:94
entry_SYSCALL_64_after_hwframe+0x77/0x7f
connection error: failed to recv *flatrpc.ExecutorMessageRawT: EOF
Tested on:
commit: 983d014a kernel: modules: Add SPDX license identifier ..
git tree: upstream
console output: https://syzkaller.appspot.com/x/log.txt?x=17870852580000
kernel config: https://syzkaller.appspot.com/x/.config?x=87bc41cae23d2144
dashboard link: https://syzkaller.appspot.com/bug?extid=3f2d46b6e62b8dd546d3
compiler: gcc (Debian 12.2.0-14+deb12u1) 12.2.0, GNU ld (GNU Binutils for Debian) 2.40
patch: https://syzkaller.appspot.com/x/patch.diff?x=162e5a3a580000
next parent reply other threads:[~2026-01-16 14:04 UTC|newest]
Thread overview: 9+ messages / expand[flat|nested] mbox.gz Atom feed top
[not found] <20260116125146.1226609-1-kartikey406@gmail.com>
2026-01-16 14:04 ` syzbot [this message]
2026-01-17 14:26 Testing for netrom: fix memory leak in nr_add_node Prithvi Tambewagh
2026-01-17 17:00 ` [syzbot] [hams?] " syzbot
[not found] <20260116093944.1224799-1-kartikey406@gmail.com>
2026-01-16 10:02 ` syzbot
[not found] <20260116085932.1223370-1-kartikey406@gmail.com>
2026-01-16 9:15 ` syzbot
[not found] <20260116082820.1222181-1-kartikey406@gmail.com>
2026-01-16 8:52 ` syzbot
[not found] <20260116074227.1221301-1-kartikey406@gmail.com>
2026-01-16 8:03 ` syzbot
[not found] <20260116034008.1209650-1-kartikey406@gmail.com>
2026-01-16 4:49 ` syzbot
[not found] <20260116021908.1208112-1-kartikey406@gmail.com>
2026-01-16 3:02 ` syzbot
-- strict thread matches above, loose matches on Subject: below --
2026-01-15 20:04 syzbot
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=696a4553.050a0220.58bed.0050.GAE@google.com \
--to=syzbot+3f2d46b6e62b8dd546d3@syzkaller.appspotmail.com \
--cc=kartikey406@gmail.com \
--cc=linux-kernel@vger.kernel.org \
--cc=syzkaller-bugs@googlegroups.com \
/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.