Hi,
> -----Original Message-----
> From: David Marchand <david.march...@redhat.com>
> Sent: Tuesday, August 1, 2023 6:19 PM
> To: dev@dpdk.org
> Cc: sta...@dpdk.org; Matan Azrad <ma...@nvidia.com>; Slava Ovsiienko
> <viachesl...@nvidia.com>; Ori Kam <or...@nvidia.com>; Suanming Mou
> <suanmi...@nvidia.com>; Bing Zhao <bi...@nvidia.com>
> Subject: [PATCH] net/mlx5: fix leak in sysfs port name translation
>
> getline() may allocate a buffer even though it returns -1:
> """
> If *lineptr is set to NULL before the call, then getline() will allocate a
> buffer for
> storing the line. This buffer should be freed by the user program even if
> getline() failed.
> """
>
> This leak has been observed on a RHEL8 system with two CX5 PF devices (no
> VFs).
>
> ASan reports:
> ==8899==ERROR: LeakSanitizer: detected memory leaks
>
> Direct leak of 120 byte(s) in 1 object(s) allocated from:
> #0 0x7fe58576aba8 in __interceptor_malloc
> (/lib64/libasan.so.5+0xefba8)
> #1 0x7fe583e866b2 in __getdelim (/lib64/libc.so.6+0x886b2)
> #2 0x327bd23 in mlx5_sysfs_switch_info
> ../drivers/net/mlx5/linux/mlx5_ethdev_os.c:1084
> #3 0x3271f86 in mlx5_os_pci_probe_pf
> ../drivers/net/mlx5/linux/mlx5_os.c:2282
> #4 0x3273c83 in mlx5_os_pci_probe
> ../drivers/net/mlx5/linux/mlx5_os.c:2497
> #5 0x327475f in mlx5_os_net_probe
> ../drivers/net/mlx5/linux/mlx5_os.c:2578
> #6 0xc6eac7 in drivers_probe
> ../drivers/common/mlx5/mlx5_common.c:937
> #7 0xc6f150 in mlx5_common_dev_probe
> ../drivers/common/mlx5/mlx5_common.c:1027
> #8 0xc8ef80 in mlx5_common_pci_probe
> ../drivers/common/mlx5/mlx5_common_pci.c:168
> #9 0xc21b67 in rte_pci_probe_one_driver
> ../drivers/bus/pci/pci_common.c:312
> #10 0xc2224c in pci_probe_all_drivers
> ../drivers/bus/pci/pci_common.c:396
> #11 0xc222f4 in pci_probe ../drivers/bus/pci/pci_common.c:423
> #12 0xb71fff in rte_bus_probe ../lib/eal/common/eal_common_bus.c:78
> #13 0xbe6888 in rte_eal_init ../lib/eal/linux/eal.c:1300
> #14 0x5ec717 in main ../app/test-pmd/testpmd.c:4515
> #15 0x7fe583e38d84 in __libc_start_main (/lib64/libc.so.6+0x3ad84)
>
> As far as why getline() errors, strace gives a hint:
> 8516 openat(AT_FDCWD, "/sys/class/net/enp130s0f0/phys_port_name",
> O_RDONLY) = 34
> 8516 fstat(34, {st_mode=S_IFREG|0444, st_size=4096, ...}) = 0
> 8516 read(34, 0x621000098900, 4096) = -1 EOPNOTSUPP (Operation
> not supported)
>
> Fixes: f8a226ed65fa ("net/mlx5: fix sysfs port name translation")
> Cc: sta...@dpdk.org
>
> Signed-off-by: David Marchand <david.march...@redhat.com>
Patch applied to next-net-mlx,
Kindest regards,
Raslan Darawsheh
