CVE-2021-47438

CVE-2021-47438 updated by NVD

Modified

2026-08-06

Sources

nvd

Summary

In the Linux kernel, the following vulnerability has been resolved: net/mlx5e: Fix memory leak in mlx5_core_destroy_cq() error path Prior to this patch in case mlx5_core_destroy_cq() failed it returns without completing all destroy operations and that leads to memory leak. Instead, complete the destroy flow before return error. Also move mlx5_debug_cq_remove() to the beginning of mlx5_core_destroy_cq() to be symmetrical with mlx5_core_create_cq(). kmemleak complains on: unreferenced object 0xc000000038625100 (size 64): comm "ethtool", pid 28301, jiffies 4298062946 (age 785.380s) hex dump (first 32 bytes): 60 01 48 94 00 00 00 c0 b8 05 34 c3 00 00 00 c0 `.H.......4..... 02 00 00 00 00 00 00 00 00 db 7d c1 00 00 00 c0 ..........}..... backtrace: [ ] add_res_tree+0xd0/0x270 [mlx5_core] [ ] mlx5_debug_cq_add+0x5c/0xc0 [mlx5_core] [ ] mlx5_core_create_cq+0x1d0/0x2d0 [mlx5_core] [ ] mlx5e_create_cq+0x210/0x3f0 [mlx5_core] [ ] mlx5e_open_cq+0xb4/0x130 [mlx5_core] [ ] mlx5e_ptp_open+0x7f4/0xe10 [mlx5_core] [ ] mlx5e_open_channels+0x9cc/0x13e0 [mlx5_core] [ ] mlx5e_switch_priv_channels+0xa4/0x230 [mlx5_core] [ ] mlx5e_safe_switch_params+0x14c/0x300 [mlx5_core] [ ] set_pflag_tx_port_ts+0x9c/0x160 [mlx5_core] [ ] mlx5e_set_priv_flags+0xd0/0x1b0 [mlx5_core] [ ] ethnl_set_privflags+0x234/0x2d0 [ ] genl_family_rcv_msg_doit+0x108/0x1d0 [ ] genl_family_rcv_msg+0xe4/0x1f0 [ ] genl_rcv_msg+0x78/0x120 [ ] netlink_rcv_skb+0x74/0x1a0

References

• https://nvd.nist.gov/vuln/detail/CVE-2021-47438