Messages in this thread | | | Subject | Re: [PATCH net] mwifiex: Fix possible memleak in probe and disconnect | From | "wanghai (M)" <> | Date | Mon, 18 Oct 2021 21:13:53 +0800 |
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在 2021/10/18 20:44, Kalle Valo 写道: > Wang Hai <wanghai38@huawei.com> wrote: > >> I got memory leak as follows when doing fault injection test: >> >> unreferenced object 0xffff888031c2f000 (size 512): >> comm "kworker/0:2", pid 165, jiffies 4294922253 (age 391.180s) >> hex dump (first 32 bytes): >> 00 20 f7 08 80 88 ff ff 01 00 00 00 00 00 00 00 . .............. >> 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 ................ >> backtrace: >> [<00000000537bdb86>] kmem_cache_alloc_trace+0x16d/0x360 >> [<0000000047666fab>] if_usb_probe+0x90/0x96e [usb8xxx] >> [<00000000de44b4f0>] usb_probe_interface+0x31b/0x800 [usbcore] >> [<000000009b1a1951>] really_probe+0x299/0xc30 >> [<0000000055b8ffce>] __driver_probe_device+0x357/0x500 >> [<00000000bb0c7161>] driver_probe_device+0x4e/0x140 >> [<00000000866d1730>] __device_attach_driver+0x257/0x340 >> [<0000000084e79b96>] bus_for_each_drv+0x166/0x1e0 >> [<000000009bad60ea>] __device_attach+0x272/0x420 >> [<00000000236b97c1>] bus_probe_device+0x1eb/0x2a0 >> [<000000008d77d7cf>] device_add+0xbf0/0x1cd0 >> [<000000004af6a3f0>] usb_set_configuration+0x10fb/0x18d0 [usbcore] >> [<000000002ebdfdcd>] usb_generic_driver_probe+0xa2/0xe0 [usbcore] >> [<00000000444f344d>] usb_probe_device+0xe4/0x2b0 [usbcore] >> [<000000009b1a1951>] really_probe+0x299/0xc30 >> [<0000000055b8ffce>] __driver_probe_device+0x357/0x500 >> >> cardp is missing being freed in the error handling path of the probe >> and the path of the disconnect, which will cause kmemleak. >> >> This patch adds the missing free(). >> >> Fixes: 876c9d3aeb98 ("[PATCH] Marvell Libertas 8388 802.11b/g USB driver") >> Fixes: c305a19a0d0a ("libertas_tf: usb specific functions") >> Reported-by: Hulk Robot <hulkci@huawei.com> >> Signed-off-by: Wang Hai <wanghai38@huawei.com> > mwifiex patches are applied to wireless-drivers, not to the net tree. Please be > careful how you mark your patches. Thanks for the reminder, I will pay attention to it in the future.
-- Wang Hai
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