linux-kernel - [syzbot] [usb?] memory leak in es58x

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Message-ID: <6948d6c3.a70a0220.25eec0.0084.GAE@google.com>
Date: Sun, 21 Dec 2025 21:27:31 -0800
From: syzbot <syzbot+e8cb6691a7cf68256cb8@...kaller.appspotmail.com>
To: gregkh@...uxfoundation.org, linux-kernel@...r.kernel.org, 
	linux-usb@...r.kernel.org, syzkaller-bugs@...glegroups.com
Subject: [syzbot] [usb?] memory leak in es58x_open

Hello,

syzbot found the following issue on:

HEAD commit:    ea1013c15392 Merge tag 'bpf-fixes' of git://git.kernel.org..
git tree:       upstream
console output: https://syzkaller.appspot.com/x/log.txt?x=1607bdc2580000
kernel config:  https://syzkaller.appspot.com/x/.config?x=d60836e327fd6756
dashboard link: https://syzkaller.appspot.com/bug?extid=e8cb6691a7cf68256cb8
compiler:       gcc (Debian 12.2.0-14+deb12u1) 12.2.0, GNU ld (GNU Binutils for Debian) 2.40
syz repro:      https://syzkaller.appspot.com/x/repro.syz?x=131add92580000

Downloadable assets:
disk image: https://storage.googleapis.com/syzbot-assets/5ee91238d53c/disk-ea1013c1.raw.xz
vmlinux: https://storage.googleapis.com/syzbot-assets/b8eb70b8203f/vmlinux-ea1013c1.xz
kernel image: https://storage.googleapis.com/syzbot-assets/3aed81c1b1c5/bzImage-ea1013c1.xz

IMPORTANT: if you fix the issue, please add the following tag to the commit:
Reported-by: syzbot+e8cb6691a7cf68256cb8@...kaller.appspotmail.com

BUG: memory leak
unreferenced object 0xffff88812623e000 (size 512):
  comm "dhcpcd", pid 5478, jiffies 4294946142
  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 (crc 0):
    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]
    __do_kmalloc_node mm/slub.c:5656 [inline]
    __kmalloc_noprof+0x3e0/0x660 mm/slub.c:5669
    kmalloc_noprof include/linux/slab.h:961 [inline]
    hcd_buffer_alloc+0x151/0x190 drivers/usb/core/buffer.c:134
    usb_alloc_coherent+0x44/0x70 drivers/usb/core/usb.c:1010
    es58x_alloc_urb+0x4c/0xc0 drivers/net/can/usb/etas_es58x/es58x_core.c:1553
    es58x_alloc_rx_urbs drivers/net/can/usb/etas_es58x/es58x_core.c:1711 [inline]
    es58x_open+0x1b3/0x470 drivers/net/can/usb/etas_es58x/es58x_core.c:1785
    __dev_open+0x1be/0x3c0 net/core/dev.c:1683
    __dev_change_flags+0x30c/0x380 net/core/dev.c:9734
    netif_change_flags+0x35/0x90 net/core/dev.c:9797
    dev_change_flags+0x64/0xf0 net/core/dev_api.c:68
    devinet_ioctl+0x5bf/0xd30 net/ipv4/devinet.c:1199
    inet_ioctl+0x27c/0x2b0 net/ipv4/af_inet.c:1009
    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 0xffff888126112200 (size 512):
  comm "dhcpcd", pid 5478, jiffies 4294946373
  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 (crc 0):
    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]
    __do_kmalloc_node mm/slub.c:5656 [inline]
    __kmalloc_noprof+0x3e0/0x660 mm/slub.c:5669
    kmalloc_noprof include/linux/slab.h:961 [inline]
    hcd_buffer_alloc+0x151/0x190 drivers/usb/core/buffer.c:134
    usb_alloc_coherent+0x44/0x70 drivers/usb/core/usb.c:1010
    es58x_alloc_urb+0x4c/0xc0 drivers/net/can/usb/etas_es58x/es58x_core.c:1553
    es58x_alloc_rx_urbs drivers/net/can/usb/etas_es58x/es58x_core.c:1711 [inline]
    es58x_open+0x1b3/0x470 drivers/net/can/usb/etas_es58x/es58x_core.c:1785
    __dev_open+0x1be/0x3c0 net/core/dev.c:1683
    __dev_change_flags+0x30c/0x380 net/core/dev.c:9734
    netif_change_flags+0x35/0x90 net/core/dev.c:9797
    dev_change_flags+0x64/0xf0 net/core/dev_api.c:68
    devinet_ioctl+0x5bf/0xd30 net/ipv4/devinet.c:1199
    inet_ioctl+0x27c/0x2b0 net/ipv4/af_inet.c:1009
    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 0xffff888126188800 (size 512):
  comm "dhcpcd", pid 5478, jiffies 4294946404
  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 (crc 0):
    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]
    __do_kmalloc_node mm/slub.c:5656 [inline]
    __kmalloc_noprof+0x3e0/0x660 mm/slub.c:5669
    kmalloc_noprof include/linux/slab.h:961 [inline]
    hcd_buffer_alloc+0x151/0x190 drivers/usb/core/buffer.c:134
    usb_alloc_coherent+0x44/0x70 drivers/usb/core/usb.c:1010
    es58x_alloc_urb+0x4c/0xc0 drivers/net/can/usb/etas_es58x/es58x_core.c:1553
    es58x_alloc_rx_urbs drivers/net/can/usb/etas_es58x/es58x_core.c:1711 [inline]
    es58x_open+0x1b3/0x470 drivers/net/can/usb/etas_es58x/es58x_core.c:1785
    __dev_open+0x1be/0x3c0 net/core/dev.c:1683
    __dev_change_flags+0x30c/0x380 net/core/dev.c:9734
    netif_change_flags+0x35/0x90 net/core/dev.c:9797
    dev_change_flags+0x64/0xf0 net/core/dev_api.c:68
    devinet_ioctl+0x5bf/0xd30 net/ipv4/devinet.c:1199
    inet_ioctl+0x27c/0x2b0 net/ipv4/af_inet.c:1009
    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


---
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