ACK: [SRU][F][PATCH 0/1] CVE-2024-26929

[Noah Wager]

On Mon, Jul 22, 2024 at 04:03:47PM -0500, Bethany Jamison wrote:
> [Impact]
> 
> scsi: qla2xxx: Fix double free of fcport
> 
> The server was crashing after LOGO because fcport was getting freed twice.
> 
>  -----------[ cut here ]-----------
>  kernel BUG at mm/slub.c:371!
>  invalid opcode: 0000 1 SMP PTI
>  CPU: 35 PID: 4610 Comm: bash Kdump: loaded Tainted: G OE --------- - - 4.18.0-425.3.1.el8.x86_64 #1
>  Hardware name: HPE ProLiant DL360 Gen10/ProLiant DL360 Gen10, BIOS U32 09/03/2021
>  RIP: 0010:set_freepointer.part.57+0x0/0x10
>  RSP: 0018:ffffb07107027d90 EFLAGS: 00010246
>  RAX: ffff9cb7e3150000 RBX: ffff9cb7e332b9c0 RCX: ffff9cb7e3150400
>  RDX: 0000000000001f37 RSI: 0000000000000000 RDI: ffff9cb7c0005500
>  RBP: fffff693448c5400 R08: 0000000080000000 R09: 0000000000000009
>  R10: 0000000000000000 R11: 0000000000132af0 R12: ffff9cb7c0005500
>  R13: ffff9cb7e3150000 R14: ffffffffc06990e0 R15: ffff9cb7ea85ea58
>  FS: 00007ff6b79c2740(0000) GS:ffff9cb8f7ec0000(0000) knlGS:0000000000000000
>  CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033
>  CR2: 000055b426b7d700 CR3: 0000000169c18002 CR4: 00000000007706e0
>  DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000
>  DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400
>  PKRU: 55555554
>  Call Trace:
>  kfree+0x238/0x250
>  qla2x00_els_dcmd_sp_free+0x20/0x230 [qla2xxx]
>  ? qla24xx_els_dcmd_iocb+0x607/0x690 [qla2xxx]
>  qla2x00_issue_logo+0x28c/0x2a0 [qla2xxx]
>  ? qla2x00_issue_logo+0x28c/0x2a0 [qla2xxx]
>  ? kernfs_fop_write+0x11e/0x1a0
> 
> Remove one of the free calls and add check for valid fcport. Also use
> function qla2x00_free_fcport() instead of kfree().
> 
> [Fix]
> 
> Noble:	released
> Jammy:  released
> Focal:	Backported - I replaced 'qla2x000_free_fcport(fcport)' with
>         'kfree(sp->fcport)' because qla2x000_free_fcport is not defined
>         in Focal and is not easily added, kfree should be a good
>         substitute for the original intension of the fix change
> Bionic:	fix sent to esm ML
> Xenial:	fix already sent to esm ML
> Trusty: not going to be fixed by us
> 
> [Test Case]
> 
> Compiled
> 
> [Where problems could occur]
> 
> This fix affects those who use the QLogic Fibre Channel HBA Driver,
> an issue with this fix would be visible to the user via undefined
> behavior or a system crash.
> 
> Saurav Kashyap (1):
>   scsi: qla2xxx: Fix double free of fcport
> 
>  drivers/scsi/qla2xxx/qla_iocb.c | 4 +++-
>  1 file changed, 3 insertions(+), 1 deletion(-)
> 
> -- 
> 2.34.1
> 
> 
> -- 
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> kernel-team at lists.ubuntu.com
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Acked-by: Noah Wager <noah.wager at canonical.com>