CC: kbuild-all(a)lists.01.org BCC: lkp(a)intel.com CC: linux-kernel(a)vger.kernel.org TO: Eric Dumazet <edumazet(a)google.com&gt; CC: Jakub Kicinski <kuba(a)kernel.org&gt; tree: https://git.kernel.org/pub/scm/linux/kernel/git/torvalds/linux.git master head: 8ab2afa23bd197df47819a87f0265c0ac95c5b6a commit: e93abb840a2c356ed2809c31fcedb058601ac2e4 net/tcp_fastopen: remove tcp_fastopen_ctx_lock date: 11 months ago :::::: branch date: 14 hours ago :::::: commit date: 11 months ago config: ia64-randconfig-m031-20220530 (https://download.01.org/0day-ci/archive/20220531/202205311732.UCAiYskK-lk...) compiler: ia64-linux-gcc (GCC) 11.3.0 If you fix the issue, kindly add following tag where applicable Reported-by: kernel test robot <lkp(a)intel.com&gt; Reported-by: Dan Carpenter <dan.carpenter(a)oracle.com&gt; smatch warnings: net/ipv4/tcp_fastopen.c:97 tcp_fastopen_reset_cipher() warn: possible memory leak of 'ctx' vim +/ctx +97 net/ipv4/tcp_fastopen.c 437138485656c4 Haishuang Yan 2017-09-27 63 9092a76d3cf863 Jason Baron 2019-05-29 64 int tcp_fastopen_reset_cipher(struct net *net, struct sock *sk, 438ac88009bcb1 Ard Biesheuvel 2019-06-19 65 void *primary_key, void *backup_key) 9092a76d3cf863 Jason Baron 2019-05-29 66 { 9092a76d3cf863 Jason Baron 2019-05-29 67 struct tcp_fastopen_context *ctx, *octx; 9092a76d3cf863 Jason Baron 2019-05-29 68 struct fastopen_queue *q; 9092a76d3cf863 Jason Baron 2019-05-29 69 int err = 0; 1046716368979d Jerry Chu 2012-08-31 70 c681edae33e86f Ard Biesheuvel 2019-06-17 71 ctx = kmalloc(sizeof(*ctx), GFP_KERNEL); c681edae33e86f Ard Biesheuvel 2019-06-17 72 if (!ctx) { c681edae33e86f Ard Biesheuvel 2019-06-17 73 err = -ENOMEM; 9092a76d3cf863 Jason Baron 2019-05-29 74 goto out; 9092a76d3cf863 Jason Baron 2019-05-29 75 } c681edae33e86f Ard Biesheuvel 2019-06-17 76 438ac88009bcb1 Ard Biesheuvel 2019-06-19 77 ctx->key[0].key[0] = get_unaligned_le64(primary_key); 438ac88009bcb1 Ard Biesheuvel 2019-06-19 78 ctx->key[0].key[1] = get_unaligned_le64(primary_key + 8); c681edae33e86f Ard Biesheuvel 2019-06-17 79 if (backup_key) { 438ac88009bcb1 Ard Biesheuvel 2019-06-19 80 ctx->key[1].key[0] = get_unaligned_le64(backup_key); 438ac88009bcb1 Ard Biesheuvel 2019-06-19 81 ctx->key[1].key[1] = get_unaligned_le64(backup_key + 8); c681edae33e86f Ard Biesheuvel 2019-06-17 82 ctx->num = 2; c681edae33e86f Ard Biesheuvel 2019-06-17 83 } else { c681edae33e86f Ard Biesheuvel 2019-06-17 84 ctx->num = 1; c681edae33e86f Ard Biesheuvel 2019-06-17 85 } c681edae33e86f Ard Biesheuvel 2019-06-17 86 1fba70e5b6bed5 Yuchung Cheng 2017-10-18 87 if (sk) { 1fba70e5b6bed5 Yuchung Cheng 2017-10-18 88 q = &inet_csk(sk)->icsk_accept_queue.fastopenq; e93abb840a2c35 Eric Dumazet 2021-07-19 89 octx = xchg((__force struct tcp_fastopen_context **)&q->ctx, ctx); 1fba70e5b6bed5 Yuchung Cheng 2017-10-18 90 } else { e93abb840a2c35 Eric Dumazet 2021-07-19 91 octx = xchg((__force struct tcp_fastopen_context **)&net->ipv4.tcp_fastopen_ctx, ctx); 1fba70e5b6bed5 Yuchung Cheng 2017-10-18 92 } 1046716368979d Jerry Chu 2012-08-31 93 1046716368979d Jerry Chu 2012-08-31 94 if (octx) 1046716368979d Jerry Chu 2012-08-31 95 call_rcu(&octx->rcu, tcp_fastopen_ctx_free); 9092a76d3cf863 Jason Baron 2019-05-29 96 out: 1046716368979d Jerry Chu 2012-08-31 @97 return err; 1046716368979d Jerry Chu 2012-08-31 98 } 1046716368979d Jerry Chu 2012-08-31 99 :::::: The code at line 97 was first introduced by commit :::::: 1046716368979dee857a2b8a91c4a8833f21b9cb tcp: TCP Fast Open Server - header & support functions :::::: TO: Jerry Chu <hkchu(a)google.com&gt; :::::: CC: David S. Miller <davem(a)davemloft.net&gt; -- 0-DAY CI Kernel Test Service https://01.org/lkp