CVE-2025-71238

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

scsi: qla2xxx: Fix bsg_done() causing double free

Kernel panic observed on system,

[5353358.825191] BUG: unable to handle page fault for address: ff5f5e897b024000 [5353358.825194] #PF: supervisor write access in kernel mode [5353358.825195] #PF: errorcode(0x0002) - not-present page [5353358.825196] PGD 100006067 P4D 0 [5353358.825198] Oops: 0002 [#1] PREEMPT SMP NOPTI [5353358.825200] CPU: 5 PID: 2132085 Comm: qlafwupdate.sub Kdump: loaded Tainted: G W L ------- --- 5.14.0-503.34.1.el95.x8664 #1 [5353358.825203] Hardware name: HPE ProLiant DL360 Gen11/ProLiant DL360 Gen11, BIOS 2.44 01/17/2025 [5353358.825204] RIP: 0010:memcpyerms+0x6/0x10 [5353358.825211] RSP: 0018:ff591da8f4f6b710 EFLAGS: 00010246 [5353358.825212] RAX: ff5f5e897b024000 RBX: 0000000000007090 RCX: 0000000000001000 [5353358.825213] RDX: 0000000000001000 RSI: ff591da8f4fed090 RDI: ff5f5e897b024000 [5353358.825214] RBP: 0000000000010000 R08: ff5f5e897b024000 R09: 0000000000000000 [5353358.825215] R10: ff46cf8c40517000 R11: 0000000000000001 R12: 0000000000008090 [5353358.825216] R13: ff591da8f4f6b720 R14: 0000000000001000 R15: 0000000000000000 [5353358.825218] FS: 00007f1e88d47740(0000) GS:ff46cf935f940000(0000) knlGS:0000000000000000 [5353358.825219] CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033 [5353358.825220] CR2: ff5f5e897b024000 CR3: 0000000231532004 CR4: 0000000000771ef0 [5353358.825221] PKRU: 55555554 [5353358.825222] Call Trace: [5353358.825223] <TASK> [5353358.825224] ? showtraceloglvl+0x1c4/0x2df [5353358.825229] ? showtraceloglvl+0x1c4/0x2df [5353358.825232] ? sgcopybuffer+0xc8/0x110 [5353358.825236] ? _diebody.cold+0x8/0xd [5353358.825238] ? pagefaultoops+0x134/0x170 [5353358.825242] ? kernelmodefixuporoops+0x84/0x110 [5353358.825244] ? excpagefault+0xa8/0x150 [5353358.825247] ? asmexcpagefault+0x22/0x30 [5353358.825252] ? memcpyerms+0x6/0x10 [5353358.825253] sgcopybuffer+0xc8/0x110 [5353358.825259] qla2x00processvendorspecific+0x652/0x1320 [qla2xxx] [5353358.825317] qla24xxbsgrequest+0x1b2/0x2d0 [qla2xxx]

Most routines in qlabsg.c call bsgdone() only for success cases. However a few invoke it for failure case as well leading to a double free. Validate before calling bsg_done().