CVE-2022-49333

In the Linux kernel, the following vulnerability has been resolved:

net/mlx5: E-Switch, pair only capable devices

OFFLOADS paring using devcom is possible only on devices that support LAG. Filter based on lag capabilities.

This fixes an issue where mlx5getnextphysdev() was called without holding the interface lock.

This issue was found when commit bc4c2f2e0179 ("net/mlx5: Lag, filter non compatible devices") added an assert that verifies the interface lock is held.

WARNING: CPU: 9 PID: 1706 at drivers/net/ethernet/mellanox/mlx5/core/dev.c:642 mlx5getnextphysdev+0xd2/0x100 [mlx5core] Modules linked in: mlx5vdpa vringh vhostiotlb vdpa mlx5ib mlx5core xtconntrack xtMASQUERADE nfconntracknetlink nfnetlink xtaddrtype iptablenat nfnat brnetfilter rpcrdma rdmaucm ibiser libiscsi scsitransportiscsi rdmacm iwcm ibumad ibipoib ibcm ibuverbs ibcore overlay fuse [last unloaded: mlx5core] CPU: 9 PID: 1706 Comm: devlink Not tainted 5.18.0-rc7+ #11 Hardware name: QEMU Standard PC (Q35 + ICH9, 2009), BIOS rel-1.13.0-0-gf21b5a4aeb02-prebuilt.qemu.org 04/01/2014 RIP: 0010:mlx5getnextphysdev+0xd2/0x100 [mlx5core] Code: 02 00 75 48 48 8b 85 80 04 00 00 5d c3 31 c0 5d c3 be ff ff ff ff 48 c7 c7 08 41 5b a0 e8 36 87 28 e3 85 c0 0f 85 6f ff ff ff <0f> 0b e9 68 ff ff ff 48 c7 c7 0c 91 cc 84 e8 cb 36 6f e1 e9 4d ff RSP: 0018:ffff88811bf47458 EFLAGS: 00010246 RAX: 0000000000000000 RBX: ffff88811b398000 RCX: 0000000000000001 RDX: 0000000080000000 RSI: ffffffffa05b4108 RDI: ffff88812daaaa78 RBP: ffff88812d050380 R08: 0000000000000001 R09: ffff88811d6b3437 R10: 0000000000000001 R11: 00000000fddd3581 R12: ffff88815238c000 R13: ffff88812d050380 R14: ffff8881018aa7e0 R15: ffff88811d6b3428 FS: 00007fc82e18ae80(0000) GS:ffff88842e080000(0000) knlGS:0000000000000000 CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033 CR2: 00007f9630d1b421 CR3: 0000000149802004 CR4: 0000000000370ea0 DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000 DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400 Call Trace: <TASK> mlx5eswoffloadsdevcomevent+0x99/0x3b0 [mlx5core] mlx5devcomsendevent+0x167/0x1d0 [mlx5core] eswoffloadsenable+0x1153/0x1500 [mlx5core] ? mlx5eswoffloadscontrollervalid+0x170/0x170 [mlx5core] ? waitforcompletioniotimeout+0x20/0x20 ? mlx5rescandriverslocked+0x318/0x810 [mlx5core] mlx5eswitchenablelocked+0x586/0xc50 [mlx5core] ? mlx5eswitchdisablepfvfvports+0x1d0/0x1d0 [mlx5core] ? mlx5eswtrylock+0x1b/0xb0 [mlx5core] ? mlx5eswitchenable+0x270/0x270 [mlx5core] ? _debugfscreatefile+0x260/0x3e0 mlx5devlinkeswitchmodeset+0x27e/0x870 [mlx5core] ? mutexlockionested+0x12c0/0x12c0 ? eswoffloadsdisable+0x250/0x250 [mlx5core] ? devlinknlcmdtrapgetdumpit+0x470/0x470 ? rcureadlockschedheld+0x3f/0x70 devlinknlcmdeswitchsetdoit+0x217/0x620