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* [syzbot] [virt?] [net?] memory leak in __vsock_create (2)
@ 2026-04-24  2:02 syzbot
  2026-04-27 16:18 ` Stefano Garzarella
  0 siblings, 1 reply; 3+ messages in thread
From: syzbot @ 2026-04-24  2:02 UTC (permalink / raw)
  To: davem, edumazet, horms, kuba, linux-kernel, netdev, pabeni,
	sgarzare, syzkaller-bugs, virtualization

Hello,

syzbot found the following issue on:

HEAD commit:    1f318b96cc84 Linux 7.0-rc3
git tree:       upstream
console output: https://syzkaller.appspot.com/x/log.txt?x=14db28ba580000
kernel config:  https://syzkaller.appspot.com/x/.config?x=2c6ad6fefffa76b1
dashboard link: https://syzkaller.appspot.com/bug?extid=1b2c9c4a0f8708082678
compiler:       gcc (Debian 14.2.0-19) 14.2.0, GNU ld (GNU Binutils for Debian) 2.44
syz repro:      https://syzkaller.appspot.com/x/repro.syz?x=12db28ba580000
C reproducer:   https://syzkaller.appspot.com/x/repro.c?x=1215175a580000

Downloadable assets:
disk image: https://storage.googleapis.com/syzbot-assets/d4ebd240d832/disk-1f318b96.raw.xz
vmlinux: https://storage.googleapis.com/syzbot-assets/9548f49a7dec/vmlinux-1f318b96.xz
kernel image: https://storage.googleapis.com/syzbot-assets/4e16f2bcfc7d/bzImage-1f318b96.xz

IMPORTANT: if you fix the issue, please add the following tag to the commit:
Reported-by: syzbot+1b2c9c4a0f8708082678@syzkaller.appspotmail.com

2026/03/09 23:37:29 executed programs: 5
BUG: memory leak
unreferenced object 0xffff888128bb6d00 (size 1272):
  comm "kworker/0:1", pid 10, jiffies 4294944453
  hex dump (first 32 bytes):
    00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00  ................
    28 00 0b 40 00 00 00 00 00 00 00 00 00 00 00 00  (..@............
  backtrace (crc 31367ed9):
    kmemleak_alloc_recursive include/linux/kmemleak.h:44 [inline]
    slab_post_alloc_hook mm/slub.c:4547 [inline]
    slab_alloc_node mm/slub.c:4869 [inline]
    kmem_cache_alloc_noprof+0x372/0x480 mm/slub.c:4876
    sk_prot_alloc+0x3e/0x1b0 net/core/sock.c:2239
    sk_alloc+0x36/0x460 net/core/sock.c:2301
    __vsock_create.constprop.0+0x38/0x2f0 net/vmw_vsock/af_vsock.c:893
    virtio_transport_recv_listen net/vmw_vsock/virtio_transport_common.c:1557 [inline]
    virtio_transport_recv_pkt+0x855/0xfc0 net/vmw_vsock/virtio_transport_common.c:1685
    vsock_loopback_work+0x104/0x140 net/vmw_vsock/vsock_loopback.c:142
    process_one_work+0x26c/0x5d0 kernel/workqueue.c:3275
    process_scheduled_works kernel/workqueue.c:3358 [inline]
    worker_thread+0x243/0x490 kernel/workqueue.c:3439
    kthread+0x14e/0x1a0 kernel/kthread.c:436
    ret_from_fork+0x23c/0x4b0 arch/x86/kernel/process.c:158
    ret_from_fork_asm+0x1a/0x30 arch/x86/entry/entry_64.S:245

BUG: memory leak
unreferenced object 0xffff8881141e93a0 (size 32):
  comm "kworker/0:1", pid 10, jiffies 4294944453
  hex dump (first 32 bytes):
    f8 6e 0a 00 81 88 ff ff 00 00 00 00 00 00 00 00  .n..............
    00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00  ................
  backtrace (crc e7f5c8b3):
    kmemleak_alloc_recursive include/linux/kmemleak.h:44 [inline]
    slab_post_alloc_hook mm/slub.c:4547 [inline]
    slab_alloc_node mm/slub.c:4869 [inline]
    __do_kmalloc_node mm/slub.c:5262 [inline]
    __kmalloc_noprof+0x3bd/0x560 mm/slub.c:5275
    kmalloc_noprof include/linux/slab.h:954 [inline]
    kzalloc_noprof include/linux/slab.h:1188 [inline]
    lsm_blob_alloc+0x4d/0x80 security/security.c:192
    lsm_sock_alloc security/security.c:4375 [inline]
    security_sk_alloc+0x2d/0x290 security/security.c:4391
    sk_prot_alloc+0x8f/0x1b0 net/core/sock.c:2248
    sk_alloc+0x36/0x460 net/core/sock.c:2301
    __vsock_create.constprop.0+0x38/0x2f0 net/vmw_vsock/af_vsock.c:893
    virtio_transport_recv_listen net/vmw_vsock/virtio_transport_common.c:1557 [inline]
    virtio_transport_recv_pkt+0x855/0xfc0 net/vmw_vsock/virtio_transport_common.c:1685
    vsock_loopback_work+0x104/0x140 net/vmw_vsock/vsock_loopback.c:142
    process_one_work+0x26c/0x5d0 kernel/workqueue.c:3275
    process_scheduled_works kernel/workqueue.c:3358 [inline]
    worker_thread+0x243/0x490 kernel/workqueue.c:3439
    kthread+0x14e/0x1a0 kernel/kthread.c:436
    ret_from_fork+0x23c/0x4b0 arch/x86/kernel/process.c:158
    ret_from_fork_asm+0x1a/0x30 arch/x86/entry/entry_64.S:245

BUG: memory leak
unreferenced object 0xffff888128bfa8a0 (size 96):
  comm "kworker/0:1", pid 10, jiffies 4294944453
  hex dump (first 32 bytes):
    00 6d bb 28 81 88 ff ff 00 00 00 00 00 00 00 00  .m.(............
    00 00 00 00 00 00 00 00 00 00 04 00 00 00 00 00  ................
  backtrace (crc 1fd60988):
    kmemleak_alloc_recursive include/linux/kmemleak.h:44 [inline]
    slab_post_alloc_hook mm/slub.c:4547 [inline]
    slab_alloc_node mm/slub.c:4869 [inline]
    __kmalloc_cache_noprof+0x377/0x480 mm/slub.c:5378
    kmalloc_noprof include/linux/slab.h:950 [inline]
    kzalloc_noprof include/linux/slab.h:1188 [inline]
    virtio_transport_do_socket_init+0x2b/0xf0 net/vmw_vsock/virtio_transport_common.c:923
    vsock_assign_transport+0x309/0x3a0 net/vmw_vsock/af_vsock.c:642
    virtio_transport_recv_listen net/vmw_vsock/virtio_transport_common.c:1575 [inline]
    virtio_transport_recv_pkt+0x8bc/0xfc0 net/vmw_vsock/virtio_transport_common.c:1685
    vsock_loopback_work+0x104/0x140 net/vmw_vsock/vsock_loopback.c:142
    process_one_work+0x26c/0x5d0 kernel/workqueue.c:3275
    process_scheduled_works kernel/workqueue.c:3358 [inline]
    worker_thread+0x243/0x490 kernel/workqueue.c:3439
    kthread+0x14e/0x1a0 kernel/kthread.c:436
    ret_from_fork+0x23c/0x4b0 arch/x86/kernel/process.c:158
    ret_from_fork_asm+0x1a/0x30 arch/x86/entry/entry_64.S:245

BUG: memory leak
unreferenced object 0xffff888129e1e800 (size 1272):
  comm "kworker/1:3", pid 5832, jiffies 4294944454
  hex dump (first 32 bytes):
    00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00  ................
    28 00 0b 40 00 00 00 00 00 00 00 00 00 00 00 00  (..@............
  backtrace (crc 4bfb7c57):
    kmemleak_alloc_recursive include/linux/kmemleak.h:44 [inline]
    slab_post_alloc_hook mm/slub.c:4547 [inline]
    slab_alloc_node mm/slub.c:4869 [inline]
    kmem_cache_alloc_noprof+0x372/0x480 mm/slub.c:4876
    sk_prot_alloc+0x3e/0x1b0 net/core/sock.c:2239
    sk_alloc+0x36/0x460 net/core/sock.c:2301
    __vsock_create.constprop.0+0x38/0x2f0 net/vmw_vsock/af_vsock.c:893
    virtio_transport_recv_listen net/vmw_vsock/virtio_transport_common.c:1557 [inline]
    virtio_transport_recv_pkt+0x855/0xfc0 net/vmw_vsock/virtio_transport_common.c:1685
    vsock_loopback_work+0x104/0x140 net/vmw_vsock/vsock_loopback.c:142
    process_one_work+0x26c/0x5d0 kernel/workqueue.c:3275
    process_scheduled_works kernel/workqueue.c:3358 [inline]
    worker_thread+0x243/0x490 kernel/workqueue.c:3439
    kthread+0x14e/0x1a0 kernel/kthread.c:436
    ret_from_fork+0x23c/0x4b0 arch/x86/kernel/process.c:158
    ret_from_fork_asm+0x1a/0x30 arch/x86/entry/entry_64.S:245

BUG: memory leak
unreferenced object 0xffff888114372e80 (size 32):
  comm "kworker/1:3", pid 5832, jiffies 4294944454
  hex dump (first 32 bytes):
    f8 6e 0a 00 81 88 ff ff 00 00 00 00 00 00 00 00  .n..............
    00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00  ................
  backtrace (crc e7f5c8b3):
    kmemleak_alloc_recursive include/linux/kmemleak.h:44 [inline]
    slab_post_alloc_hook mm/slub.c:4547 [inline]
    slab_alloc_node mm/slub.c:4869 [inline]
    __do_kmalloc_node mm/slub.c:5262 [inline]
    __kmalloc_noprof+0x3bd/0x560 mm/slub.c:5275
    kmalloc_noprof include/linux/slab.h:954 [inline]
    kzalloc_noprof include/linux/slab.h:1188 [inline]
    lsm_blob_alloc+0x4d/0x80 security/security.c:192
    lsm_sock_alloc security/security.c:4375 [inline]
    security_sk_alloc+0x2d/0x290 security/security.c:4391
    sk_prot_alloc+0x8f/0x1b0 net/core/sock.c:2248
    sk_alloc+0x36/0x460 net/core/sock.c:2301
    __vsock_create.constprop.0+0x38/0x2f0 net/vmw_vsock/af_vsock.c:893
    virtio_transport_recv_listen net/vmw_vsock/virtio_transport_common.c:1557 [inline]
    virtio_transport_recv_pkt+0x855/0xfc0 net/vmw_vsock/virtio_transport_common.c:1685
    vsock_loopback_work+0x104/0x140 net/vmw_vsock/vsock_loopback.c:142
    process_one_work+0x26c/0x5d0 kernel/workqueue.c:3275
    process_scheduled_works kernel/workqueue.c:3358 [inline]
    worker_thread+0x243/0x490 kernel/workqueue.c:3439
    kthread+0x14e/0x1a0 kernel/kthread.c:436
    ret_from_fork+0x23c/0x4b0 arch/x86/kernel/process.c:158
    ret_from_fork_asm+0x1a/0x30 arch/x86/entry/entry_64.S:245

BUG: memory leak
unreferenced object 0xffff8881054d0ea0 (size 96):
  comm "kworker/1:3", pid 5832, jiffies 4294944454
  hex dump (first 32 bytes):
    00 e8 e1 29 81 88 ff ff 00 00 00 00 00 00 00 00  ...)............
    00 00 00 00 00 00 00 00 00 00 04 00 00 00 00 00  ................
  backtrace (crc 72501265):
    kmemleak_alloc_recursive include/linux/kmemleak.h:44 [inline]
    slab_post_alloc_hook mm/slub.c:4547 [inline]
    slab_alloc_node mm/slub.c:4869 [inline]
    __kmalloc_cache_noprof+0x377/0x480 mm/slub.c:5378
    kmalloc_noprof include/linux/slab.h:950 [inline]
    kzalloc_noprof include/linux/slab.h:1188 [inline]
    virtio_transport_do_socket_init+0x2b/0xf0 net/vmw_vsock/virtio_transport_common.c:923
    vsock_assign_transport+0x309/0x3a0 net/vmw_vsock/af_vsock.c:642
    virtio_transport_recv_listen net/vmw_vsock/virtio_transport_common.c:1575 [inline]
    virtio_transport_recv_pkt+0x8bc/0xfc0 net/vmw_vsock/virtio_transport_common.c:1685
    vsock_loopback_work+0x104/0x140 net/vmw_vsock/vsock_loopback.c:142
    process_one_work+0x26c/0x5d0 kernel/workqueue.c:3275
    process_scheduled_works kernel/workqueue.c:3358 [inline]
    worker_thread+0x243/0x490 kernel/workqueue.c:3439
    kthread+0x14e/0x1a0 kernel/kthread.c:436
    ret_from_fork+0x23c/0x4b0 arch/x86/kernel/process.c:158
    ret_from_fork_asm+0x1a/0x30 arch/x86/entry/entry_64.S:245

connection error: failed to recv *flatrpc.ExecutorMessageRawT: EOF


---
This report is generated by a bot. It may contain errors.
See https://goo.gl/tpsmEJ for more information about syzbot.
syzbot engineers can be reached at syzkaller@googlegroups.com.

syzbot will keep track of this issue. See:
https://goo.gl/tpsmEJ#status for how to communicate with syzbot.

If the report is already addressed, let syzbot know by replying with:
#syz fix: exact-commit-title

If you want syzbot to run the reproducer, reply with:
#syz test: git://repo/address.git branch-or-commit-hash
If you attach or paste a git patch, syzbot will apply it before testing.

If you want to overwrite report's subsystems, reply with:
#syz set subsystems: new-subsystem
(See the list of subsystem names on the web dashboard)

If the report is a duplicate of another one, reply with:
#syz dup: exact-subject-of-another-report

If you want to undo deduplication, reply with:
#syz undup

^ permalink raw reply	[flat|nested] 3+ messages in thread

* Re: [syzbot] [virt?] [net?] memory leak in __vsock_create (2)
  2026-04-24  2:02 [syzbot] [virt?] [net?] memory leak in __vsock_create (2) syzbot
@ 2026-04-27 16:18 ` Stefano Garzarella
  2026-04-27 17:03   ` syzbot
  0 siblings, 1 reply; 3+ messages in thread
From: Stefano Garzarella @ 2026-04-27 16:18 UTC (permalink / raw)
  To: syzbot
  Cc: davem, edumazet, horms, kuba, linux-kernel, netdev, pabeni,
	syzkaller-bugs, virtualization

#syz test: https://github.com/stefano-garzarella/linux.git fix-syzbot-memleak-vsock-create


^ permalink raw reply	[flat|nested] 3+ messages in thread

* Re: [syzbot] [virt?] [net?] memory leak in __vsock_create (2)
  2026-04-27 16:18 ` Stefano Garzarella
@ 2026-04-27 17:03   ` syzbot
  0 siblings, 0 replies; 3+ messages in thread
From: syzbot @ 2026-04-27 17:03 UTC (permalink / raw)
  To: davem, edumazet, horms, kuba, linux-kernel, netdev, pabeni,
	sgarzare, syzkaller-bugs, virtualization

Hello,

syzbot has tested the proposed patch but the reproducer is still triggering an issue:
memory leak in prepare_creds

2026/04/27 17:01:37 executed programs: 5
BUG: memory leak
unreferenced object 0xffff888103b7b900 (size 184):
  comm "syz-executor", pid 6458, jiffies 4294946243
  hex dump (first 32 bytes):
    01 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 5efbd4bc):
    kmemleak_alloc_recursive include/linux/kmemleak.h:44 [inline]
    slab_post_alloc_hook mm/slub.c:4574 [inline]
    slab_alloc_node mm/slub.c:4898 [inline]
    kmem_cache_alloc_noprof+0x36c/0x480 mm/slub.c:4905
    prepare_creds+0x22/0x600 kernel/cred.c:185
    copy_creds+0x44/0x290 kernel/cred.c:286
    copy_process+0x920/0x2cf0 kernel/fork.c:2123
    kernel_clone+0xde/0x700 kernel/fork.c:2723
    __do_sys_clone+0x7f/0xb0 kernel/fork.c:2864
    do_syscall_x64 arch/x86/entry/syscall_64.c:63 [inline]
    do_syscall_64+0xee/0xf80 arch/x86/entry/syscall_64.c:94
    entry_SYSCALL_64_after_hwframe+0x77/0x7f

BUG: memory leak
unreferenced object 0xffff88810ad103a0 (size 32):
  comm "syz-executor", pid 6458, jiffies 4294946243
  hex dump (first 32 bytes):
    00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00  ................
    f8 56 0a 00 81 88 ff ff 00 00 00 00 00 00 00 00  .V..............
  backtrace (crc 109407f3):
    kmemleak_alloc_recursive include/linux/kmemleak.h:44 [inline]
    slab_post_alloc_hook mm/slub.c:4574 [inline]
    slab_alloc_node mm/slub.c:4898 [inline]
    __do_kmalloc_node mm/slub.c:5294 [inline]
    __kmalloc_noprof+0x3b7/0x550 mm/slub.c:5307
    kmalloc_noprof include/linux/slab.h:954 [inline]
    kzalloc_noprof include/linux/slab.h:1188 [inline]
    lsm_blob_alloc+0x4d/0x80 security/security.c:218
    lsm_cred_alloc security/security.c:235 [inline]
    security_prepare_creds+0x2d/0x290 security/security.c:2866
    prepare_creds+0x395/0x600 kernel/cred.c:215
    copy_creds+0x44/0x290 kernel/cred.c:286
    copy_process+0x920/0x2cf0 kernel/fork.c:2123
    kernel_clone+0xde/0x700 kernel/fork.c:2723
    __do_sys_clone+0x7f/0xb0 kernel/fork.c:2864
    do_syscall_x64 arch/x86/entry/syscall_64.c:63 [inline]
    do_syscall_64+0xee/0xf80 arch/x86/entry/syscall_64.c:94
    entry_SYSCALL_64_after_hwframe+0x77/0x7f

BUG: memory leak
unreferenced object 0xffff888111516800 (size 1272):
  comm "kworker/1:3", pid 5684, jiffies 4294946243
  hex dump (first 32 bytes):
    00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00  ................
    28 00 0b 40 00 00 00 00 00 00 00 00 00 00 00 00  (..@............
  backtrace (crc 5e448183):
    kmemleak_alloc_recursive include/linux/kmemleak.h:44 [inline]
    slab_post_alloc_hook mm/slub.c:4574 [inline]
    slab_alloc_node mm/slub.c:4898 [inline]
    kmem_cache_alloc_noprof+0x36c/0x480 mm/slub.c:4905
    sk_prot_alloc+0x3e/0x1b0 net/core/sock.c:2241
    sk_alloc+0x36/0x460 net/core/sock.c:2303
    __vsock_create.constprop.0+0x38/0x2f0 net/vmw_vsock/af_vsock.c:907
    virtio_transport_recv_listen net/vmw_vsock/virtio_transport_common.c:1566 [inline]
    virtio_transport_recv_pkt+0x88d/0xfb0 net/vmw_vsock/virtio_transport_common.c:1693
    vsock_loopback_work+0x104/0x140 net/vmw_vsock/vsock_loopback.c:142
    process_one_work+0x277/0x5b0 kernel/workqueue.c:3302
    process_scheduled_works kernel/workqueue.c:3385 [inline]
    worker_thread+0x255/0x4a0 kernel/workqueue.c:3466
    kthread+0x14e/0x1a0 kernel/kthread.c:436
    ret_from_fork+0x219/0x490 arch/x86/kernel/process.c:158
    ret_from_fork_asm+0x1a/0x30 arch/x86/entry/entry_64.S:245

BUG: memory leak
unreferenced object 0xffff88812daab5e0 (size 32):
  comm "kworker/1:3", pid 5684, jiffies 4294946243
  hex dump (first 32 bytes):
    f8 56 0a 00 81 88 ff ff 00 00 00 00 00 00 00 00  .V..............
    00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00  ................
  backtrace (crc 79381f4a):
    kmemleak_alloc_recursive include/linux/kmemleak.h:44 [inline]
    slab_post_alloc_hook mm/slub.c:4574 [inline]
    slab_alloc_node mm/slub.c:4898 [inline]
    __do_kmalloc_node mm/slub.c:5294 [inline]
    __kmalloc_noprof+0x3b7/0x550 mm/slub.c:5307
    kmalloc_noprof include/linux/slab.h:954 [inline]
    kzalloc_noprof include/linux/slab.h:1188 [inline]
    lsm_blob_alloc+0x4d/0x80 security/security.c:218
    lsm_sock_alloc security/security.c:4478 [inline]
    security_sk_alloc+0x2d/0x290 security/security.c:4494
    sk_prot_alloc+0x8f/0x1b0 net/core/sock.c:2250
    sk_alloc+0x36/0x460 net/core/sock.c:2303
    __vsock_create.constprop.0+0x38/0x2f0 net/vmw_vsock/af_vsock.c:907
    virtio_transport_recv_listen net/vmw_vsock/virtio_transport_common.c:1566 [inline]
    virtio_transport_recv_pkt+0x88d/0xfb0 net/vmw_vsock/virtio_transport_common.c:1693
    vsock_loopback_work+0x104/0x140 net/vmw_vsock/vsock_loopback.c:142
    process_one_work+0x277/0x5b0 kernel/workqueue.c:3302
    process_scheduled_works kernel/workqueue.c:3385 [inline]
    worker_thread+0x255/0x4a0 kernel/workqueue.c:3466
    kthread+0x14e/0x1a0 kernel/kthread.c:436
    ret_from_fork+0x219/0x490 arch/x86/kernel/process.c:158
    ret_from_fork_asm+0x1a/0x30 arch/x86/entry/entry_64.S:245

BUG: memory leak
unreferenced object 0xffff88810b1a75a0 (size 96):
  comm "kworker/1:3", pid 5684, jiffies 4294946243
  hex dump (first 32 bytes):
    00 68 51 11 81 88 ff ff 00 00 00 00 00 00 00 00  .hQ.............
    00 00 00 00 00 00 00 00 00 00 04 00 00 00 00 00  ................
  backtrace (crc 428f2031):
    kmemleak_alloc_recursive include/linux/kmemleak.h:44 [inline]
    slab_post_alloc_hook mm/slub.c:4574 [inline]
    slab_alloc_node mm/slub.c:4898 [inline]
    __kmalloc_cache_noprof+0x371/0x480 mm/slub.c:5410
    kmalloc_noprof include/linux/slab.h:950 [inline]
    kzalloc_noprof include/linux/slab.h:1188 [inline]
    virtio_transport_do_socket_init+0x2b/0xf0 net/vmw_vsock/virtio_transport_common.c:925
    vsock_assign_transport+0x3a3/0x460 net/vmw_vsock/af_vsock.c:656
    virtio_transport_recv_listen net/vmw_vsock/virtio_transport_common.c:1582 [inline]
    virtio_transport_recv_pkt+0x8e5/0xfb0 net/vmw_vsock/virtio_transport_common.c:1693
    vsock_loopback_work+0x104/0x140 net/vmw_vsock/vsock_loopback.c:142
    process_one_work+0x277/0x5b0 kernel/workqueue.c:3302
    process_scheduled_works kernel/workqueue.c:3385 [inline]
    worker_thread+0x255/0x4a0 kernel/workqueue.c:3466
    kthread+0x14e/0x1a0 kernel/kthread.c:436
    ret_from_fork+0x219/0x490 arch/x86/kernel/process.c:158
    ret_from_fork_asm+0x1a/0x30 arch/x86/entry/entry_64.S:245

BUG: memory leak
unreferenced object 0xffff888111516300 (size 1272):
  comm "kworker/1:3", pid 5684, jiffies 4294946244
  hex dump (first 32 bytes):
    00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00  ................
    28 00 0b 40 00 00 00 00 00 00 00 00 00 00 00 00  (..@............
  backtrace (crc e1cd45d1):
    kmemleak_alloc_recursive include/linux/kmemleak.h:44 [inline]
    slab_post_alloc_hook mm/slub.c:4574 [inline]
    slab_alloc_node mm/slub.c:4898 [inline]
    kmem_cache_alloc_noprof+0x36c/0x480 mm/slub.c:4905
    sk_prot_alloc+0x3e/0x1b0 net/core/sock.c:2241
    sk_alloc+0x36/0x460 net/core/sock.c:2303
    __vsock_create.constprop.0+0x38/0x2f0 net/vmw_vsock/af_vsock.c:907
    virtio_transport_recv_listen net/vmw_vsock/virtio_transport_common.c:1566 [inline]
    virtio_transport_recv_pkt+0x88d/0xfb0 net/vmw_vsock/virtio_transport_common.c:1693
    vsock_loopback_work+0x104/0x140 net/vmw_vsock/vsock_loopback.c:142
    process_one_work+0x277/0x5b0 kernel/workqueue.c:3302
    process_scheduled_works kernel/workqueue.c:3385 [inline]
    worker_thread+0x255/0x4a0 kernel/workqueue.c:3466
    kthread+0x14e/0x1a0 kernel/kthread.c:436
    ret_from_fork+0x219/0x490 arch/x86/kernel/process.c:158
    ret_from_fork_asm+0x1a/0x30 arch/x86/entry/entry_64.S:245

connection error: failed to recv *flatrpc.ExecutorMessageRawT: EOF


Tested on:

commit:         39ff9a4a vsock/virtio: fix socket leak on close_timeou..
git tree:       https://github.com/stefano-garzarella/linux.git fix-syzbot-memleak-vsock-create
console output: https://syzkaller.appspot.com/x/log.txt?x=1742b896580000
kernel config:  https://syzkaller.appspot.com/x/.config?x=dfcc8f993a958a78
dashboard link: https://syzkaller.appspot.com/bug?extid=1b2c9c4a0f8708082678
compiler:       gcc (Debian 14.2.0-19) 14.2.0, GNU ld (GNU Binutils for Debian) 2.44

Note: no patches were applied.

^ permalink raw reply	[flat|nested] 3+ messages in thread

end of thread, other threads:[~2026-04-27 17:03 UTC | newest]

Thread overview: 3+ messages (download: mbox.gz follow: Atom feed
-- links below jump to the message on this page --
2026-04-24  2:02 [syzbot] [virt?] [net?] memory leak in __vsock_create (2) syzbot
2026-04-27 16:18 ` Stefano Garzarella
2026-04-27 17:03   ` syzbot

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