> From: Intel-wired-lan <intel-wired-lan-boun...@osuosl.org> On Behalf Of Tong > Zhang > Sent: Tuesday, September 8, 2020 9:23 AM > To: Kirsher, Jeffrey T <jeffrey.t.kirs...@intel.com>; David S. Miller > <da...@davemloft.net>; Jakub Kicinski <k...@kernel.org>; intel-wired- > l...@lists.osuosl.org; net...@vger.kernel.org; linux-kernel@vger.kernel.org > Cc: ztong0...@gmail.com > Subject: [Intel-wired-lan] [PATCH] e1000: do not panic on malformed rx_desc > > length may be corrupted in rx_desc and lead to panic, so check the > sanity before passing it to skb_put > > [ 167.667701] skbuff: skb_over_panic: text:ffffffffb1e32cc1 len:60224 > put:60224 head:ffff888055ac5000 data:ffff888055ac5040 tail:0xeb80 end:0x6c0 > dev:e > th0 > [ 167.668429] ------------[ cut here ]------------ > [ 167.668661] kernel BUG at net/core/skbuff.c:109! > [ 167.668910] invalid opcode: 0000 [#1] SMP DEBUG_PAGEALLOC KASAN PTI > [ 167.669220] CPU: 1 PID: 170 Comm: sd-resolve Tainted: G W > 5.8.0+ > #1 > [ 167.670161] RIP: 0010:skb_panic+0xc4/0xc6 > [ 167.670363] Code: 89 f0 48 c7 c7 60 f2 de b2 55 48 8b 74 24 18 4d 89 f9 56 > 48 > 8b 54 24 18 4c 89 e6 52 48 8b 44 24 18 4c 89 ea 50 e8 31 c5 2a ff <0f> > 0b 4c 8b 64 24 18 e8 f1 b4 48 ff 48 c7 c1 00 fc de b2 44 89 ee > [ 167.671272] RSP: 0018:ffff88806d109c68 EFLAGS: 00010286 > [ 167.671527] RAX: 000000000000008c RBX: ffff888065e9af40 RCX: > 0000000000000000 > [ 167.671878] RDX: 1ffff1100da24c91 RSI: 0000000000000008 RDI: > ffffed100da21380 > [ 167.672227] RBP: ffff88806bde4000 R08: 000000000000008c R09: > ffffed100da25cfb > [ 167.672583] R10: ffff88806d12e7d7 R11: ffffed100da25cfa R12: > ffffffffb2defc40 > [ 167.672931] R13: ffffffffb1e32cc1 R14: 000000000000eb40 R15: > ffff888055ac5000 > [ 167.673286] FS: 00007fc5f5375700(0000) GS:ffff88806d100000(0000) > knlGS:0000000000000000 > [ 167.673681] CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033 > [ 167.673973] CR2: 0000000000cb3008 CR3: 0000000063d36000 CR4: > 00000000000006e0 > [ 167.674330] DR0: 0000000000000000 DR1: 0000000000000000 DR2: > 0000000000000000 > [ 167.674677] DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: > 0000000000000400 > [ 167.675035] Call Trace: > [ 167.675168] <IRQ> > [ 167.675315] ? e1000_clean_rx_irq+0x311/0x630 > [ 167.687459] skb_put.cold+0x1f/0x1f > [ 167.687637] e1000_clean_rx_irq+0x311/0x630 > [ 167.687852] e1000e_poll+0x19a/0x4d0 > [ 167.688038] ? e1000_watchdog_task+0x9d0/0x9d0 > [ 167.688262] ? credit_entropy_bits.constprop.0+0x6f/0x1c0 > [ 167.688527] net_rx_action+0x26e/0x650 > > Signed-off-by: Tong Zhang <ztong0...@gmail.com> > --- > drivers/net/ethernet/intel/e1000/e1000_main.c | 7 ++++++- > 1 file changed, 6 insertions(+), 1 deletion(-)
Tested-by: Aaron Brown <aaron.f.br...@intel.com> Again, regression tested. I was not able to trigger the panic with or without patch.
