From: Jens Axboe <axboe@kernel.dk>
To: Alexei Starovoitov <ast@kernel.org>,
Daniel Borkmann <daniel@iogearbox.net>
Cc: "open list:XDP SOCKETS (AF_XDP)" <bpf@vger.kernel.org>,
LKML <linux-kernel@vger.kernel.org>
Subject: bpf leaking memory
Date: Fri, 1 Aug 2025 10:31:48 -0600 [thread overview]
Message-ID: <97100307-8297-45b2-8f0b-d3b7ef109805@kernel.dk> (raw)
Hi,
Current -git (any within the last day or two) leaks memory at boot,
as reported by kmemleak, see below. This is running debian unstable
on aarc64.
unreferenced object 0xffff0000c820d000 (size 64):
comm "systemd", pid 1, jiffies 4294667980
hex dump (first 32 bytes):
01 00 00 00 00 00 ff ff 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 84021ac):
kmemleak_alloc+0x3c/0x50
__kmalloc_node_track_caller_noprof+0x370/0x500
krealloc_noprof+0x238/0x300
kvrealloc_noprof+0x44/0x100
do_check_common+0x2668/0x2d50
bpf_check+0x2464/0x2ec0
bpf_prog_load+0x5c8/0xba8
__sys_bpf+0x9c0/0x20a0
__arm64_sys_bpf+0x24/0x60
invoke_syscall.constprop.0+0x44/0x100
el0_svc_common.constprop.0+0x3c/0xe0
do_el0_svc+0x20/0x30
el0_svc+0x30/0xe0
el0t_64_sync_handler+0x98/0xe0
el0t_64_sync+0x170/0x178
unreferenced object 0xffff0000c8ccd900 (size 64):
comm "systemd", pid 1, jiffies 4294667983
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 8e80d088):
kmemleak_alloc+0x3c/0x50
__kmalloc_node_track_caller_noprof+0x370/0x500
krealloc_noprof+0x238/0x300
kvrealloc_noprof+0x44/0x100
do_check_common+0x2668/0x2d50
bpf_check+0x2464/0x2ec0
bpf_prog_load+0x5c8/0xba8
__sys_bpf+0x9c0/0x20a0
__arm64_sys_bpf+0x24/0x60
invoke_syscall.constprop.0+0x44/0x100
el0_svc_common.constprop.0+0x3c/0xe0
do_el0_svc+0x20/0x30
el0_svc+0x30/0xe0
el0t_64_sync_handler+0x98/0xe0
el0t_64_sync+0x170/0x178
unreferenced object 0xffff0000c8fc0300 (size 64):
comm "systemd", pid 1, jiffies 4294668000
hex dump (first 32 bytes):
01 00 00 00 29 00 00 20 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 335bd269):
kmemleak_alloc+0x3c/0x50
__kmalloc_node_track_caller_noprof+0x370/0x500
krealloc_noprof+0x238/0x300
kvrealloc_noprof+0x44/0x100
do_check_common+0x2668/0x2d50
bpf_check+0x2464/0x2ec0
bpf_prog_load+0x5c8/0xba8
__sys_bpf+0x9c0/0x20a0
__arm64_sys_bpf+0x24/0x60
invoke_syscall.constprop.0+0x44/0x100
el0_svc_common.constprop.0+0x3c/0xe0
do_el0_svc+0x20/0x30
el0_svc+0x30/0xe0
el0t_64_sync_handler+0x98/0xe0
el0t_64_sync+0x170/0x178
unreferenced object 0xffff0000c8c84980 (size 64):
comm "systemd", pid 1, jiffies 4294668003
hex dump (first 32 bytes):
01 00 00 00 23 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 3cc2e52e):
kmemleak_alloc+0x3c/0x50
__kmalloc_node_track_caller_noprof+0x370/0x500
krealloc_noprof+0x238/0x300
kvrealloc_noprof+0x44/0x100
do_check_common+0x2668/0x2d50
bpf_check+0x2464/0x2ec0
bpf_prog_load+0x5c8/0xba8
__sys_bpf+0x9c0/0x20a0
__arm64_sys_bpf+0x24/0x60
invoke_syscall.constprop.0+0x44/0x100
el0_svc_common.constprop.0+0x3c/0xe0
do_el0_svc+0x20/0x30
el0_svc+0x30/0xe0
el0t_64_sync_handler+0x98/0xe0
el0t_64_sync+0x170/0x178
--
Jens Axboe
next reply other threads:[~2025-08-01 16:31 UTC|newest]
Thread overview: 3+ messages / expand[flat|nested] mbox.gz Atom feed top
2025-08-01 16:31 Jens Axboe [this message]
2025-08-01 22:41 ` Alexei Starovoitov
2025-08-01 23:26 ` Eduard Zingerman
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