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FS#3339 - [netifd] potential kernel memory leak #8539

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openwrt-bot opened this issue Sep 15, 2020 · 0 comments
Closed

FS#3339 - [netifd] potential kernel memory leak #8539

openwrt-bot opened this issue Sep 15, 2020 · 0 comments
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n8v8R:

  • mvebu
  • self-compiled kernel 5.9 with memleak detection enabled
  • netifd 2020-09-12-55a7b6b7-1

echo clear > /sys/kernel/debug/kmemleak echo scan > /sys/kernel/debug/kmemleak cat /sys/kernel/debug/kmemleak

unreferenced object 0xe9400000 (size 8896):
comm "netifd", pid 2314, jiffies 4294824963 (age 12186.578s)
hex dump (first 32 bytes):
00 00 40 e9 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:
[<6c721e2f>] hwbm_pool_refill+0x50/0x88
[<7e7e2552>] hwbm_pool_add+0x6c/0x11c
[<092daf5d>] mvneta_bm_update_mtu+0x64/0x1ac
[<25a31bd5>] mvneta_change_mtu+0xa4/0x140
[] dev_set_mtu_ext+0xd8/0x198
[<28e7b11b>] dev_set_mtu+0x44/0xa4
[<82387d21>] dsa_slave_change_mtu+0x134/0x20c
[] dev_set_mtu_ext+0xd8/0x198
[<28e7b11b>] dev_set_mtu+0x44/0xa4
[<61c48941>] dev_ioctl+0x31c/0x464
[<2480ee5a>] sock_ioctl+0x2e4/0x664
[<406a3520>] sys_ioctl+0x90/0xbc
[<31543a6f>] ret_fast_syscall+0x0/0x54
[<784618c7>] 0xbecaaad8
unreferenced object 0xea92c000 (size 8896):
comm "netifd", pid 2314, jiffies 4294824965 (age 12186.574s)
hex dump (first 32 bytes):
00 c0 92 ea 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:
[<6c721e2f>] hwbm_pool_refill+0x50/0x88
[<7e7e2552>] hwbm_pool_add+0x6c/0x11c
[<092daf5d>] mvneta_bm_update_mtu+0x64/0x1ac
[<25a31bd5>] mvneta_change_mtu+0xa4/0x140
[] dev_set_mtu_ext+0xd8/0x198
[<28e7b11b>] dev_set_mtu+0x44/0xa4
[<82387d21>] dsa_slave_change_mtu+0x134/0x20c
[] dev_set_mtu_ext+0xd8/0x198
[<28e7b11b>] dev_set_mtu+0x44/0xa4
[<61c48941>] dev_ioctl+0x31c/0x464
[<2480ee5a>] sock_ioctl+0x2e4/0x664
[<406a3520>] sys_ioctl+0x90/0xbc
[<31543a6f>] ret_fast_syscall+0x0/0x54
[<784618c7>] 0xbecaaad8

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