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Fri, 01 Aug 2025 09:31:49 -0700 (PDT) Message-ID: <97100307-8297-45b2-8f0b-d3b7ef109805@kernel.dk> Date: Fri, 1 Aug 2025 10:31:48 -0600 Precedence: bulk X-Mailing-List: linux-kernel@vger.kernel.org List-Id: List-Subscribe: List-Unsubscribe: MIME-Version: 1.0 User-Agent: Mozilla Thunderbird Content-Language: en-US To: Alexei Starovoitov , Daniel Borkmann Cc: "open list:XDP SOCKETS (AF_XDP)" , LKML From: Jens Axboe Subject: bpf leaking memory Content-Type: text/plain; charset=UTF-8 Content-Transfer-Encoding: 7bit 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