diff for duplicates of <1711748213-30517-1-git-send-email-haiyangz@microsoft.com> diff --git a/a/content_digest b/N1/content_digest index 1381359..bd93a75 100644 --- a/a/content_digest +++ b/N1/content_digest @@ -1,34 +1,34 @@ "From\0Haiyang Zhang <haiyangz@microsoft.com>\0" "Subject\0[PATCH net] net: mana: Fix Rx DMA datasize and skb_over_panic\0" "Date\0Fri, 29 Mar 2024 14:36:53 -0700\0" - "To\0linux-hyperv@vger.kernel.org" - " netdev@vger.kernel.org\0" - "Cc\0haiyangz@microsoft.com" - decui@microsoft.com - stephen@networkplumber.org - kys@microsoft.com - paulros@microsoft.com - olaf@aepfle.de - vkuznets@redhat.com - davem@davemloft.net - wei.liu@kernel.org - edumazet@google.com - kuba@kernel.org - pabeni@redhat.com - leon@kernel.org - longli@microsoft.com - ssengar@linux.microsoft.com - linux-rdma@vger.kernel.org - daniel@iogearbox.net - john.fastabend@gmail.com - bpf@vger.kernel.org - ast@kernel.org - sharmaajay@microsoft.com - hawk@kernel.org - tglx@linutronix.de - shradhagupta@linux.microsoft.com - linux-kernel@vger.kernel.org - " stable@vger.kernel.org\0" + "To\0<linux-hyperv@vger.kernel.org>" + " <netdev@vger.kernel.org>\0" + "Cc\0<haiyangz@microsoft.com>" + <decui@microsoft.com> + <stephen@networkplumber.org> + <kys@microsoft.com> + <paulros@microsoft.com> + <olaf@aepfle.de> + <vkuznets@redhat.com> + <davem@davemloft.net> + <wei.liu@kernel.org> + <edumazet@google.com> + <kuba@kernel.org> + <pabeni@redhat.com> + <leon@kernel.org> + <longli@microsoft.com> + <ssengar@linux.microsoft.com> + <linux-rdma@vger.kernel.org> + <daniel@iogearbox.net> + <john.fastabend@gmail.com> + <bpf@vger.kernel.org> + <ast@kernel.org> + <sharmaajay@microsoft.com> + <hawk@kernel.org> + <tglx@linutronix.de> + <shradhagupta@linux.microsoft.com> + <linux-kernel@vger.kernel.org> + " <stable@vger.kernel.org>\0" "\00:1\0" "b\0" "mana_get_rxbuf_cfg() aligns the RX buffer's DMA datasize to be\n" @@ -91,4 +91,4 @@ "-- \n" 2.34.1 -765354841903e2e00a350678f048cfdd5422d22ac448dba70e99c6ef0fc422ea +7429774ae753030fb076ee914f4e317fa01d1a50dac83998d463f167e83163f9
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So a packet slightly bigger than mtu+14, say 1536, +can be received and cause skb_over_panic. + +Sample dmesg: +[ 5325.237162] skbuff: skb_over_panic: text:ffffffffc043277a len:1536 put:1536 head:ff1100018b517000 data:ff1100018b517100 tail:0x700 end:0x6ea dev:<NULL> +[ 5325.243689] ------------[ cut here ]------------ +[ 5325.245748] kernel BUG at net/core/skbuff.c:192! +[ 5325.247838] invalid opcode: 0000 [#1] PREEMPT SMP NOPTI +[ 5325.258374] RIP: 0010:skb_panic+0x4f/0x60 +[ 5325.302941] Call Trace: +[ 5325.304389] <IRQ> +[ 5325.315794] ? skb_panic+0x4f/0x60 +[ 5325.317457] ? asm_exc_invalid_op+0x1f/0x30 +[ 5325.319490] ? skb_panic+0x4f/0x60 +[ 5325.321161] skb_put+0x4e/0x50 +[ 5325.322670] mana_poll+0x6fa/0xb50 [mana] +[ 5325.324578] __napi_poll+0x33/0x1e0 +[ 5325.326328] net_rx_action+0x12e/0x280 + +As discussed internally, this alignment is not necessary. To fix +this bug, remove it from the code. So oversized packets will be +marked as CQE_RX_TRUNCATED by NIC, and dropped. + +Cc: stable@vger.kernel.org +Fixes: ca9c54d2d6a5 ("net: mana: Add a driver for Microsoft Azure Network Adapter (MANA)") +Signed-off-by: Haiyang Zhang <haiyangz@microsoft.com> +--- + drivers/net/ethernet/microsoft/mana/mana_en.c | 2 +- + include/net/mana/mana.h | 1 - + 2 files changed, 1 insertion(+), 2 deletions(-) + +diff --git a/drivers/net/ethernet/microsoft/mana/mana_en.c b/drivers/net/ethernet/microsoft/mana/mana_en.c +index 59287c6e6cee..d8af5e7e15b4 100644 +--- a/drivers/net/ethernet/microsoft/mana/mana_en.c ++++ b/drivers/net/ethernet/microsoft/mana/mana_en.c +@@ -601,7 +601,7 @@ static void mana_get_rxbuf_cfg(int mtu, u32 *datasize, u32 *alloc_size, + + *alloc_size = mtu + MANA_RXBUF_PAD + *headroom; + +- *datasize = ALIGN(mtu + ETH_HLEN, MANA_RX_DATA_ALIGN); ++ *datasize = mtu + ETH_HLEN; + } + + static int mana_pre_alloc_rxbufs(struct mana_port_context *mpc, int new_mtu) +diff --git a/include/net/mana/mana.h b/include/net/mana/mana.h +index 76147feb0d10..4eeedf14711b 100644 +--- a/include/net/mana/mana.h ++++ b/include/net/mana/mana.h +@@ -39,7 +39,6 @@ enum TRI_STATE { + #define COMP_ENTRY_SIZE 64 + + #define RX_BUFFERS_PER_QUEUE 512 +-#define MANA_RX_DATA_ALIGN 64 + + #define MAX_SEND_BUFFERS_PER_QUEUE 256 + +-- +2.34.1 diff --git a/a/content_digest b/N2/content_digest index 1381359..017b29c 100644 --- a/a/content_digest +++ b/N2/content_digest @@ -1,34 +1,34 @@ "From\0Haiyang Zhang <haiyangz@microsoft.com>\0" "Subject\0[PATCH net] net: mana: Fix Rx DMA datasize and skb_over_panic\0" "Date\0Fri, 29 Mar 2024 14:36:53 -0700\0" - "To\0linux-hyperv@vger.kernel.org" - " netdev@vger.kernel.org\0" - "Cc\0haiyangz@microsoft.com" - decui@microsoft.com - stephen@networkplumber.org - kys@microsoft.com - paulros@microsoft.com - olaf@aepfle.de - vkuznets@redhat.com - davem@davemloft.net - wei.liu@kernel.org - edumazet@google.com - kuba@kernel.org - pabeni@redhat.com - leon@kernel.org - longli@microsoft.com - ssengar@linux.microsoft.com - linux-rdma@vger.kernel.org - daniel@iogearbox.net - john.fastabend@gmail.com - bpf@vger.kernel.org - ast@kernel.org - sharmaajay@microsoft.com - hawk@kernel.org - tglx@linutronix.de - shradhagupta@linux.microsoft.com - linux-kernel@vger.kernel.org - " stable@vger.kernel.org\0" + "To\0<linux-hyperv@vger.kernel.org>" + " <netdev@vger.kernel.org>\0" + "Cc\0<haiyangz@microsoft.com>" + <decui@microsoft.com> + <stephen@networkplumber.org> + <kys@microsoft.com> + <paulros@microsoft.com> + <olaf@aepfle.de> + <vkuznets@redhat.com> + <davem@davemloft.net> + <wei.liu@kernel.org> + <edumazet@google.com> + <kuba@kernel.org> + <pabeni@redhat.com> + <leon@kernel.org> + <longli@microsoft.com> + <ssengar@linux.microsoft.com> + <linux-rdma@vger.kernel.org> + <daniel@iogearbox.net> + <john.fastabend@gmail.com> + <bpf@vger.kernel.org> + <ast@kernel.org> + <sharmaajay@microsoft.com> + <hawk@kernel.org> + <tglx@linutronix.de> + 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lhZ25vc3RpY09wZXJhdG9yLDExLDA7VHJhbnNwb3J0V3JpdGVyUHJv ZHVjZXIsMjAsMTk=\n" + "X-MS-Exchange-Forest-IndexAgent: 1 2360\n" + "X-MS-Exchange-Forest-EmailMessageHash: ACD98539\n" + "X-MS-Exchange-Forest-Language: en\n" + "X-MS-Exchange-Organization-Processed-By-Journaling: Journal Agent\n" + "\n" + "mana_get_rxbuf_cfg() aligns the RX buffer's DMA datasize to be\n" + "multiple of 64. So a packet slightly bigger than mtu+14, say 1536,\n" + "can be received and cause skb_over_panic.\n" + "\n" + "Sample dmesg:\n" + "[ 5325.237162] skbuff: skb_over_panic: text:ffffffffc043277a len:1536 put:1536 head:ff1100018b517000 data:ff1100018b517100 tail:0x700 end:0x6ea dev:<NULL>\n" + "[ 5325.243689] ------------[ cut here ]------------\n" + "[ 5325.245748] kernel BUG at net/core/skbuff.c:192!\n" + "[ 5325.247838] invalid opcode: 0000 [#1] PREEMPT SMP NOPTI\n" + "[ 5325.258374] RIP: 0010:skb_panic+0x4f/0x60\n" + "[ 5325.302941] Call Trace:\n" + "[ 5325.304389] <IRQ>\n" + "[ 5325.315794] ? skb_panic+0x4f/0x60\n" + "[ 5325.317457] ? asm_exc_invalid_op+0x1f/0x30\n" + "[ 5325.319490] ? skb_panic+0x4f/0x60\n" + "[ 5325.321161] skb_put+0x4e/0x50\n" + "[ 5325.322670] mana_poll+0x6fa/0xb50 [mana]\n" + "[ 5325.324578] __napi_poll+0x33/0x1e0\n" + "[ 5325.326328] net_rx_action+0x12e/0x280\n" + "\n" + "As discussed internally, this alignment is not necessary. To fix\n" + "this bug, remove it from the code. So oversized packets will be\n" + "marked as CQE_RX_TRUNCATED by NIC, and dropped.\n" + "\n" + "Cc: stable@vger.kernel.org\n" + "Fixes: ca9c54d2d6a5 (\"net: mana: Add a driver for Microsoft Azure Network Adapter (MANA)\")\n" + "Signed-off-by: Haiyang Zhang <haiyangz@microsoft.com>\n" + "---\n" + " drivers/net/ethernet/microsoft/mana/mana_en.c | 2 +-\n" + " include/net/mana/mana.h | 1 -\n" + " 2 files changed, 1 insertion(+), 2 deletions(-)\n" + "\n" + "diff --git a/drivers/net/ethernet/microsoft/mana/mana_en.c b/drivers/net/ethernet/microsoft/mana/mana_en.c\n" + "index 59287c6e6cee..d8af5e7e15b4 100644\n" + "--- a/drivers/net/ethernet/microsoft/mana/mana_en.c\n" + "+++ b/drivers/net/ethernet/microsoft/mana/mana_en.c\n" + "@@ -601,7 +601,7 @@ static void mana_get_rxbuf_cfg(int mtu, u32 *datasize, u32 *alloc_size,\n" + " \n" + " \t*alloc_size = mtu + MANA_RXBUF_PAD + *headroom;\n" + " \n" + "-\t*datasize = ALIGN(mtu + ETH_HLEN, MANA_RX_DATA_ALIGN);\n" + "+\t*datasize = mtu + ETH_HLEN;\n" + " }\n" + " \n" + " static int mana_pre_alloc_rxbufs(struct mana_port_context *mpc, int new_mtu)\n" + "diff --git a/include/net/mana/mana.h b/include/net/mana/mana.h\n" + "index 76147feb0d10..4eeedf14711b 100644\n" + "--- a/include/net/mana/mana.h\n" + "+++ b/include/net/mana/mana.h\n" + "@@ -39,7 +39,6 @@ enum TRI_STATE {\n" + " #define COMP_ENTRY_SIZE 64\n" + " \n" + " #define RX_BUFFERS_PER_QUEUE 512\n" + "-#define MANA_RX_DATA_ALIGN 64\n" + " \n" + " #define MAX_SEND_BUFFERS_PER_QUEUE 256\n" + " \n" + "-- \n" 2.34.1 -765354841903e2e00a350678f048cfdd5422d22ac448dba70e99c6ef0fc422ea +b2be4f33f7bcebcdfc1c4215dc3928432a969e0f15121314d16c7fdb8719772f
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