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linux-stable/drivers/net/netdevsim
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Wang Yufen 207edad571 netdevsim: Fix memory leak of nsim_dev->fa_cookie 
[ Upstream commit 064bc7312b ]

kmemleak reports this issue:

unreferenced object 0xffff8881bac872d0 (size 8):
  comm "sh", pid 58603, jiffies 4481524462 (age 68.065s)
  hex dump (first 8 bytes):
    04 00 00 00 de ad be ef                          ........
  backtrace:
    [<00000000c80b8577>] __kmalloc+0x49/0x150
    [<000000005292b8c6>] nsim_dev_trap_fa_cookie_write+0xc1/0x210 [netdevsim]
    [<0000000093d78e77>] full_proxy_write+0xf3/0x180
    [<000000005a662c16>] vfs_write+0x1c5/0xaf0
    [<000000007aabf84a>] ksys_write+0xed/0x1c0
    [<000000005f1d2e47>] do_syscall_64+0x3b/0x90
    [<000000006001c6ec>] entry_SYSCALL_64_after_hwframe+0x63/0xcd

The issue occurs in the following scenarios:

nsim_dev_trap_fa_cookie_write()
  kmalloc() fa_cookie
  nsim_dev->fa_cookie = fa_cookie
..
nsim_drv_remove()

The fa_cookie allocked in nsim_dev_trap_fa_cookie_write() is not freed. To
fix, add kfree(nsim_dev->fa_cookie) to nsim_drv_remove().

Fixes: d3cbb907ae ("netdevsim: add ACL trap reporting cookie as a metadata")
Signed-off-by: Wang Yufen <wangyufen@huawei.com>
Cc: Jiri Pirko <jiri@mellanox.com>
Link: https://lore.kernel.org/r/1668504625-14698-1-git-send-email-wangyufen@huawei.com
Signed-off-by: Jakub Kicinski <kuba@kernel.org>
Signed-off-by: Sasha Levin <sashal@kernel.org>
2022-11-26 09:27:40 +01:00
..
bpf.c netdevsim: Avoid allocation warnings triggered from user space 2022-07-29 14:57:26 -07:00
bus.c netdevsim: fix memory leak in nsim_bus_dev_new() 2022-11-04 00:00:33 +09:00
dev.c netdevsim: Fix memory leak of nsim_dev->fa_cookie 2022-11-26 09:27:40 +01:00
ethtool.c Merge git://git.kernel.org/pub/scm/linux/kernel/git/netdev/net 2021-12-16 16:13:19 -08:00
fib.c Merge git://git.kernel.org/pub/scm/linux/kernel/git/netdev/net 2022-08-03 09:04:55 +02:00
health.c devlink: Delete not-used devlink APIs 2021-09-17 14:19:39 +01:00
hwstats.c netdevsim: Fix hwstats debugfs file permissions 2022-09-19 14:40:38 -07:00
ipsec.c netdevsim: rely on XFRM state direction instead of flags 2022-05-06 08:34:33 +02:00
Makefile netdevsim: Introduce support for L3 offload xstats 2022-03-15 14:00:51 +01:00
netdev.c net: Use u64_stats_fetch_begin_irq() for stats fetch. 2022-08-29 13:02:27 +01:00
netdevsim.h netdevsim: convert driver to use unlocked devlink API during init/fini 2022-07-18 20:10:48 -07:00
psample.c netdevsim: Only use sampling truncation length when valid 2021-04-22 13:23:56 -07:00
udp_tunnels.c netdevsim: set .owner to THIS_MODULE 2020-11-17 14:08:59 -08:00