memory leak in percpu_ref

Title	Replies (including bot)	Last reply
[PATCH 6.12] NFSD: net ref data still needs to be freed even if net hasn't startup	2 (2)	2026/01/12 21:06
[PATCH] NFSD: net ref data still needs to be freed even if net hasn't startup	2 (2)	2025/12/16 16:02
[syzbot] [nfs?] memory leak in percpu_ref_init	0 (3)	2025/12/16 10:22

Title

Replies (including bot)

Last reply

[PATCH 6.12] NFSD: net ref data still needs to be freed even if net hasn't startup

2 (2)

2026/01/12 21:06

[PATCH] NFSD: net ref data still needs to be freed even if net hasn't startup

2 (2)

2025/12/16 16:02

[syzbot] [nfs?] memory leak in percpu_ref_init

0 (3)

2025/12/16 10:22


Created	Duration	User	Patch	Repo	Result
2025/12/26 07:24	20m	retest repro		upstream	report log
2025/12/16 10:22	23m	kartikey406@gmail.com	patch	upstream	OK log
2025/12/16 08:02	14m	kartikey406@gmail.com	patch	upstream	report log

BUG: memory leak unreferenced object (percpu) 0x607e4d6bd360 (size 8): comm "syz.0.17", pid 6093, jiffies 4294942369 hex dump (first 8 bytes on cpu 0): 00 00 00 00 00 00 00 00 ........ backtrace (crc 0): pcpu_alloc_noprof+0x82c/0xd60 mm/percpu.c:1890 percpu_ref_init+0x36/0x1e0 lib/percpu-refcount.c:72 nfsd_create_serv+0xbe/0x260 fs/nfsd/nfssvc.c:605 nfsd_nl_listener_set_doit+0x62/0xb00 fs/nfsd/nfsctl.c:1882 genl_family_rcv_msg_doit+0x11e/0x190 net/netlink/genetlink.c:1115 genl_family_rcv_msg net/netlink/genetlink.c:1195 [inline] genl_rcv_msg+0x2fd/0x440 net/netlink/genetlink.c:1210 netlink_rcv_skb+0x93/0x1d0 net/netlink/af_netlink.c:2550 genl_rcv+0x28/0x40 net/netlink/genetlink.c:1219 netlink_unicast_kernel net/netlink/af_netlink.c:1318 [inline] netlink_unicast+0x3a3/0x4f0 net/netlink/af_netlink.c:1344 netlink_sendmsg+0x335/0x6b0 net/netlink/af_netlink.c:1894 sock_sendmsg_nosec net/socket.c:727 [inline] __sock_sendmsg net/socket.c:742 [inline] ____sys_sendmsg+0x562/0x5a0 net/socket.c:2592 ___sys_sendmsg+0xc8/0x130 net/socket.c:2646 __sys_sendmsg+0xc7/0x140 net/socket.c:2678 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 0xffff88812a39dfc0 (size 64): comm "syz.0.17", pid 6093, jiffies 4294942369 hex dump (first 32 bytes): 01 00 00 00 00 00 00 80 80 59 d7 81 ff ff ff ff .........Y...... 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 ................ backtrace (crc a2262fc6): 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] kzalloc_noprof include/linux/slab.h:1094 [inline] percpu_ref_init+0x94/0x1e0 lib/percpu-refcount.c:76 nfsd_create_serv+0xbe/0x260 fs/nfsd/nfssvc.c:605 nfsd_nl_listener_set_doit+0x62/0xb00 fs/nfsd/nfsctl.c:1882 genl_family_rcv_msg_doit+0x11e/0x190 net/netlink/genetlink.c:1115 genl_family_rcv_msg net/netlink/genetlink.c:1195 [inline] genl_rcv_msg+0x2fd/0x440 net/netlink/genetlink.c:1210 netlink_rcv_skb+0x93/0x1d0 net/netlink/af_netlink.c:2550 genl_rcv+0x28/0x40 net/netlink/genetlink.c:1219 netlink_unicast_kernel net/netlink/af_netlink.c:1318 [inline] netlink_unicast+0x3a3/0x4f0 net/netlink/af_netlink.c:1344 netlink_sendmsg+0x335/0x6b0 net/netlink/af_netlink.c:1894 sock_sendmsg_nosec net/socket.c:727 [inline] __sock_sendmsg net/socket.c:742 [inline] ____sys_sendmsg+0x562/0x5a0 net/socket.c:2592 ___sys_sendmsg+0xc8/0x130 net/socket.c:2646 __sys_sendmsg+0xc7/0x140 net/socket.c:2678 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 (percpu) 0x607e4d6bd368 (size 8): comm "syz.0.18", pid 6095, jiffies 4294942370 hex dump (first 8 bytes on cpu 0): 00 00 00 00 00 00 00 00 ........ backtrace (crc 0): pcpu_alloc_noprof+0x82c/0xd60 mm/percpu.c:1890 percpu_ref_init+0x36/0x1e0 lib/percpu-refcount.c:72 nfsd_create_serv+0xbe/0x260 fs/nfsd/nfssvc.c:605 nfsd_nl_listener_set_doit+0x62/0xb00 fs/nfsd/nfsctl.c:1882 genl_family_rcv_msg_doit+0x11e/0x190 net/netlink/genetlink.c:1115 genl_family_rcv_msg net/netlink/genetlink.c:1195 [inline] genl_rcv_msg+0x2fd/0x440 net/netlink/genetlink.c:1210 netlink_rcv_skb+0x93/0x1d0 net/netlink/af_netlink.c:2550 genl_rcv+0x28/0x40 net/netlink/genetlink.c:1219 netlink_unicast_kernel net/netlink/af_netlink.c:1318 [inline] netlink_unicast+0x3a3/0x4f0 net/netlink/af_netlink.c:1344 netlink_sendmsg+0x335/0x6b0 net/netlink/af_netlink.c:1894 sock_sendmsg_nosec net/socket.c:727 [inline] __sock_sendmsg net/socket.c:742 [inline] ____sys_sendmsg+0x562/0x5a0 net/socket.c:2592 ___sys_sendmsg+0xc8/0x130 net/socket.c:2646 __sys_sendmsg+0xc7/0x140 net/socket.c:2678 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 0xffff88812833c840 (size 64): comm "syz.0.18", pid 6095, jiffies 4294942370 hex dump (first 32 bytes): 01 00 00 00 00 00 00 80 80 59 d7 81 ff ff ff ff .........Y...... 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 ................ backtrace (crc a2262fc6): 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] kzalloc_noprof include/linux/slab.h:1094 [inline] percpu_ref_init+0x94/0x1e0 lib/percpu-refcount.c:76 nfsd_create_serv+0xbe/0x260 fs/nfsd/nfssvc.c:605 nfsd_nl_listener_set_doit+0x62/0xb00 fs/nfsd/nfsctl.c:1882 genl_family_rcv_msg_doit+0x11e/0x190 net/netlink/genetlink.c:1115 genl_family_rcv_msg net/netlink/genetlink.c:1195 [inline] genl_rcv_msg+0x2fd/0x440 net/netlink/genetlink.c:1210 netlink_rcv_skb+0x93/0x1d0 net/netlink/af_netlink.c:2550 genl_rcv+0x28/0x40 net/netlink/genetlink.c:1219 netlink_unicast_kernel net/netlink/af_netlink.c:1318 [inline] netlink_unicast+0x3a3/0x4f0 net/netlink/af_netlink.c:1344 netlink_sendmsg+0x335/0x6b0 net/netlink/af_netlink.c:1894 sock_sendmsg_nosec net/socket.c:727 [inline] __sock_sendmsg net/socket.c:742 [inline] ____sys_sendmsg+0x562/0x5a0 net/socket.c:2592 ___sys_sendmsg+0xc8/0x130 net/socket.c:2646 __sys_sendmsg+0xc7/0x140 net/socket.c:2678 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: read tcp 127.0.0.1:36571->127.0.0.1:45172: read: connection reset by peer

Crashes (1):
Time	Kernel	Commit	Syzkaller	Config	Log	Report	Syz repro	C repro	VM info	Assets (help?)	Manager	Title
2025/12/12 07:22	upstream	d358e5254674	d6526ea3	.config	console log	report	syz / log	C		[disk image] [vmlinux] [kernel image]	ci-upstream-gce-leak	memory leak in percpu_ref_init

Crashes (1):

Assets (help?)