Patch Name: PHKL_25602

Patch Description: s700_800 11.11 Fix panic in ccio_alloc_shared_mem

Creation Date: 01/11/19

Post Date:  01/11/20

Hardware Platforms - OS Releases:
	s700: 11.11
	s800: 11.11

Products: N/A

Filesets:
	OS-Core.CORE2-KRN,fr=B.11.11,fa=HP-UX_B.11.11_32,v=HP
	OS-Core.CORE2-KRN,fr=B.11.11,fa=HP-UX_B.11.11_64,v=HP

Automatic Reboot?: Yes

Status: General Release

Critical:
	Yes
	PHKL_25602: PANIC

Category Tags:
	defect_repair general_release critical panic

Path Name: /hp-ux_patches/s700_800/11.X/PHKL_25602

Symptoms:
	PHKL_25602:
	( SR:8606211197 CR:JAGad80385 )
	Panic in ccio_alloc_shared_mem() with messages in syslog
	reporting that equivalently mapped memory has been
	exhausted.

	panic: Data page fault

	  0x0006d630 (panic+0xa0)
	  0x000cc3ec (report_trap_or_int_and_panic+0x94)
	  0x000cdb0c (trap+0x11ec)
	  0x000e5aa0 (set_protid_registers+0x1bfc)
	  0x002576a0 (ccio_alloc_shared_mem+0x160)

	This is only the first six lines of the trace; the remainder
	may differ depending on the specific failure mode.

Defect Description:
	PHKL_25602:
	( SR:8606211197 CR:JAGad80385 )
	A device driver was attempting to perform DMA and failed to
	allocate the necessary memory.  This usually happens when
	the driver is servicing an interrupt, but may also occur
	during boot.

	ccio_alloc_shared_mem() assumed that equivalently mapped
	memory allocation would succeed, causing the calling kernel
	function to dereference a NULL pointer instead of passing
	an error to the caller.

	Resolution:
	Detect failure and return error to caller.

SR:
	8606211197

Patch Files:
	
	OS-Core.CORE2-KRN,fr=B.11.11,fa=HP-UX_B.11.11_32,v=HP:
	/usr/conf/lib/libio.a(pa_ccio_psm.o)

	OS-Core.CORE2-KRN,fr=B.11.11,fa=HP-UX_B.11.11_64,v=HP:
	/usr/conf/lib/libio.a(pa_ccio_psm.o)

what(1) Output:
	
	OS-Core.CORE2-KRN,fr=B.11.11,fa=HP-UX_B.11.11_32,v=HP:
	/usr/conf/lib/libio.a(pa_ccio_psm.o):
		pa_ccio_psm.c $Date: 2001/10/30 11:07:35 $Revision: 
			r11.11/1 PATCH_11.11 (PHKL_25602)

	OS-Core.CORE2-KRN,fr=B.11.11,fa=HP-UX_B.11.11_64,v=HP:
	/usr/conf/lib/libio.a(pa_ccio_psm.o):
		pa_ccio_psm.c $Date: 2001/10/30 11:07:35 $Revision: 
			r11.11/1 PATCH_11.11 (PHKL_25602)

cksum(1) Output:
	
	OS-Core.CORE2-KRN,fr=B.11.11,fa=HP-UX_B.11.11_32,v=HP:
	3676883712 31924 /usr/conf/lib/libio.a(pa_ccio_psm.o)

	OS-Core.CORE2-KRN,fr=B.11.11,fa=HP-UX_B.11.11_64,v=HP:
	3129651408 62216 /usr/conf/lib/libio.a(pa_ccio_psm.o)

Patch Conflicts: None

Patch Dependencies: None

Hardware Dependencies: None

Other Dependencies: None

Supersedes: None

Equivalent Patches:
	PHKL_24729:
	s700: 11.00
	s800: 11.00

Patch Package Size: 120 KBytes

Installation Instructions:
	Please review all instructions and the Hewlett-Packard
	SupportLine User Guide or your Hewlett-Packard support terms
	and conditions for precautions, scope of license,
	restrictions, and, limitation of liability and warranties,
	before installing this patch.
	------------------------------------------------------------
	1. Back up your system before installing a patch.

	2. Login as root.

	3. Copy the patch to the /tmp directory.

	4. Move to the /tmp directory and unshar the patch:

		cd /tmp
		sh PHKL_25602

	5. Run swinstall to install the patch:

		swinstall -x autoreboot=true -x patch_match_target=true \
			  -s /tmp/PHKL_25602.depot

	By default swinstall will archive the original software in 
	/var/adm/sw/save/PHKL_25602.  If you do not wish to retain a
	copy of the original software, include the patch_save_files
	option in the swinstall command above:

		-x patch_save_files=false

	WARNING: If patch_save_files is false when a patch is installed,
		 the patch cannot be deinstalled.  Please be careful
		 when using this feature.

	For future reference, the contents of the PHKL_25602.text file is 
	available in the product readme:

		swlist -l product -a readme -d @ /tmp/PHKL_25602.depot

	To put this patch on a magnetic tape and install from the
	tape drive, use the command:

		dd if=/tmp/PHKL_25602.depot of=/dev/rmt/0m bs=2k

Special Installation Instructions: None