From: lizf@kernel.org
To: stable@vger.kernel.org
Cc: linux-kernel@vger.kernel.org,
Martin Schwidefsky <schwidefsky@de.ibm.com>,
Zefan Li <lizefan@huawei.com>
Subject: [PATCH 3.4 016/107] s390/sclp: clear upper register halves in _sclp_print_early
Date: Wed, 16 Mar 2016 16:05:10 +0800 [thread overview]
Message-ID: <1458115601-5762-16-git-send-email-lizf@kernel.org> (raw)
In-Reply-To: <1458115541-5712-1-git-send-email-lizf@kernel.org>
From: Martin Schwidefsky <schwidefsky@de.ibm.com>
3.4.111-rc1 review patch. If anyone has any objections, please let me know.
------------------
commit f9c87a6f46d508eae0d9ae640be98d50f237f827 upstream.
If the kernel is compiled with gcc 5.1 and the XZ compression option
the decompress_kernel function calls _sclp_print_early in 64-bit mode
while the content of the upper register half of %r6 is non-zero.
This causes a specification exception on the servc instruction in
_sclp_servc.
The _sclp_print_early function saves and restores the upper registers
halves but it fails to clear them for the 31-bit code of the mini sclp
driver.
Signed-off-by: Martin Schwidefsky <schwidefsky@de.ibm.com>
Signed-off-by: Zefan Li <lizefan@huawei.com>
---
arch/s390/kernel/sclp.S | 4 ++++
1 file changed, 4 insertions(+)
diff --git a/arch/s390/kernel/sclp.S b/arch/s390/kernel/sclp.S
index 95792d8..51ca1c3 100644
--- a/arch/s390/kernel/sclp.S
+++ b/arch/s390/kernel/sclp.S
@@ -270,6 +270,8 @@ ENTRY(_sclp_print_early)
jno .Lesa2
ahi %r15,-80
stmh %r6,%r15,96(%r15) # store upper register halves
+ basr %r13,0
+ lmh %r0,%r15,.Lzeroes-.(%r13) # clear upper register halves
.Lesa2:
#endif
lr %r10,%r2 # save string pointer
@@ -293,6 +295,8 @@ ENTRY(_sclp_print_early)
#endif
lm %r6,%r15,120(%r15) # restore registers
br %r14
+.Lzeroes:
+ .fill 64,4,0
.LwritedataS4:
.long 0x00760005 # SCLP command for write data
--
1.9.1
next prev parent reply other threads:[~2016-03-16 8:41 UTC|newest]
Thread overview: 114+ messages / expand[flat|nested] mbox.gz Atom feed top
2016-03-16 8:05 [PATCH 3.4 000/107] 3.4.111-rc1 review lizf
2016-03-16 8:04 ` [PATCH 3.4 001/107] Btrfs: use kmem_cache_free when freeing entry in inode cache lizf
2016-03-16 8:04 ` [PATCH 3.4 002/107] fs/buffer.c: support buffer cache allocations with gfp modifiers lizf
2016-03-16 8:04 ` [PATCH 3.4 003/107] bufferhead: Add _gfp version for sb_getblk() lizf
2016-03-16 8:04 ` [PATCH 3.4 004/107] ext4: avoid deadlocks in the writeback path by using sb_getblk_gfp lizf
2016-03-16 8:04 ` [PATCH 3.4 005/107] ext4: replace open coded nofail allocation in ext4_free_blocks() lizf
2016-03-16 8:05 ` [PATCH 3.4 006/107] mm: avoid setting up anonymous pages into file mapping lizf
2016-03-16 8:05 ` [PATCH 3.4 007/107] hpfs: kstrdup() out of memory handling lizf
2016-03-16 8:05 ` [PATCH 3.4 008/107] hpfs: hpfs_error: Remove static buffer, use vsprintf extension %pV instead lizf
2016-03-16 8:05 ` [PATCH 3.4 009/107] 9p: don't leave a half-initialized inode sitting around lizf
2016-03-16 8:05 ` [PATCH 3.4 010/107] ALSA: usb-audio: Add MIDI support for Steinberg MI2/MI4 lizf
2016-03-16 8:05 ` [PATCH 3.4 011/107] dm btree remove: fix bug in redistribute3 lizf
2016-03-16 8:05 ` [PATCH 3.4 012/107] dm thin: allocate the cell_sort_array dynamically lizf
2016-03-16 8:05 ` [PATCH 3.4 013/107] USB: option: add 2020:4000 ID lizf
2016-03-16 8:05 ` [PATCH 3.4 014/107] USB: cp210x: add ID for Aruba Networks controllers lizf
2016-03-16 8:05 ` [PATCH 3.4 015/107] dm btree: silence lockdep lock inversion in dm_btree_del() lizf
2016-03-16 8:05 ` lizf [this message]
2016-03-16 8:05 ` [PATCH 3.4 017/107] drm: add a check for x/y in drm_mode_setcrtc lizf
2016-03-16 8:05 ` [PATCH 3.4 018/107] rtnetlink: verify IFLA_VF_INFO attributes before passing them to driver lizf
2016-03-16 8:05 ` [PATCH 3.4 019/107] net: do not process device backlog during unregistration lizf
2016-03-16 8:05 ` [PATCH 3.4 020/107] net: call rcu_read_lock early in process_backlog lizf
2016-03-16 8:05 ` [PATCH 3.4 021/107] s390/process: fix sfpc inline assembly lizf
2016-03-16 8:05 ` [PATCH 3.4 022/107] rds: rds_ib_device.refcount overflow lizf
2016-03-16 8:05 ` [PATCH 3.4 023/107] st: null pointer dereference panic caused by use after kref_put by st_open lizf
2016-03-16 8:05 ` [PATCH 3.4 024/107] ata: pmp: add quirk for Marvell 4140 SATA PMP lizf
2016-03-16 8:05 ` [PATCH 3.4 025/107] libata: add ATA_HORKAGE_BROKEN_FPDMA_AA quirk for HP 250GB SATA disk VB0250EAVER lizf
2016-03-16 8:05 ` [PATCH 3.4 026/107] libata: add ATA_HORKAGE_NOTRIM lizf
2016-03-16 8:05 ` [PATCH 3.4 027/107] libata: force disable trim for SuperSSpeed S238 lizf
2016-03-16 8:05 ` [PATCH 3.4 028/107] libata: increase the timeout when setting transfer mode lizf
2016-03-16 8:05 ` [PATCH 3.4 029/107] net: Clone skb before setting peeked flag lizf
2016-03-16 8:05 ` [PATCH 3.4 030/107] NET: AX.25: Stop heartbeat timer on disconnect lizf
2016-03-16 10:40 ` Richard Stearn
2016-03-17 1:18 ` Zefan Li
2016-03-16 8:05 ` [PATCH 3.4 031/107] can: mcp251x: fix resume when device is down lizf
2016-03-16 8:05 ` [PATCH 3.4 032/107] mac80211: clear subdir_stations when removing debugfs lizf
2016-03-16 8:05 ` [PATCH 3.4 033/107] inet: frags: fix defragmented packet's IP header for af_packet lizf
2016-03-16 8:05 ` [PATCH 3.4 034/107] md: make sure everything is freed when dm-raid stops an array lizf
2016-03-16 8:05 ` [PATCH 3.4 035/107] md: flush ->event_work before stopping array lizf
2016-03-16 8:05 ` [PATCH 3.4 036/107] usb: dwc3: Reset the transfer resource index on SET_INTERFACE lizf
2016-03-16 8:05 ` [PATCH 3.4 037/107] usb: xhci: Bugfix for NULL pointer deference in xhci_endpoint_init() function lizf
2016-03-16 8:05 ` [PATCH 3.4 038/107] xhci: Calculate old endpoints correctly on device reset lizf
2016-03-16 8:05 ` [PATCH 3.4 039/107] xhci: report U3 when link is in resume state lizf
2016-03-16 8:05 ` [PATCH 3.4 040/107] xhci: prevent bus_suspend if SS port resuming in phase 1 lizf
2016-03-16 8:05 ` [PATCH 3.4 041/107] usb-storage: ignore ZTE MF 823 card reader in mode 0x1225 lizf
2016-03-16 8:05 ` [PATCH 3.4 042/107] tile: use free_bootmem_late() for initrd lizf
2016-03-16 8:05 ` [PATCH 3.4 043/107] Input: usbtouchscreen - avoid unresponsive TSC-30 touch screen lizf
2016-03-16 8:05 ` [PATCH 3.4 044/107] md/raid1: fix test for 'was read error from last working device' lizf
2016-03-16 8:05 ` [PATCH 3.4 045/107] mmc: block: Add missing mmc_blk_put() in power_ro_lock_show() lizf
2016-03-16 8:05 ` [PATCH 3.4 046/107] netfilter: nf_conntrack: Support expectations in different zones lizf
2016-03-16 8:05 ` [PATCH 3.4 047/107] crypto: ixp4xx - Remove bogus BUG_ON on scattered dst buffer lizf
2016-03-16 8:05 ` [PATCH 3.4 048/107] iscsi-target: Fix use-after-free during TPG session shutdown lizf
2016-03-16 8:05 ` [PATCH 3.4 049/107] niu: don't count tx error twice in case of headroom realloc fails lizf
2016-03-16 8:05 ` [PATCH 3.4 050/107] vhost: actually track log eventfd file lizf
2016-03-16 8:05 ` [PATCH 3.4 051/107] USB: sierra: add 1199:68AB device ID lizf
2016-03-16 8:05 ` [PATCH 3.4 052/107] ALSA: usb-audio: add dB range mapping for some devices lizf
2016-03-16 8:05 ` [PATCH 3.4 053/107] drm/radeon/combios: add some validation of lvds values lizf
2016-03-16 8:05 ` [PATCH 3.4 054/107] target/iscsi: Fix double free of a TUR followed by a solicited NOPOUT lizf
2016-03-16 8:05 ` [PATCH 3.4 055/107] x86/xen: Probe target addresses in set_aliased_prot() before the hypercall lizf
2016-03-16 8:05 ` [PATCH 3.4 056/107] x86/ldt: Make modify_ldt synchronous lizf
2016-03-16 8:05 ` [PATCH 3.4 057/107] md/raid1: extend spinlock to protect raid1_end_read_request against inconsistencies lizf
2016-03-16 8:05 ` [PATCH 3.4 058/107] MIPS: Fix sched_getaffinity with MT FPAFF enabled lizf
2016-03-16 8:05 ` [PATCH 3.4 059/107] xhci: fix off by one error in TRB DMA address boundary check lizf
2016-03-16 8:05 ` [PATCH 3.4 060/107] rds: fix an integer overflow test in rds_info_getsockopt() lizf
2016-03-16 8:05 ` [PATCH 3.4 061/107] perf: Fix fasync handling on inherited events lizf
2016-03-16 8:05 ` [PATCH 3.4 062/107] MIPS: Make set_pte() SMP safe lizf
2016-03-16 8:05 ` [PATCH 3.4 063/107] ocfs2: fix BUG in ocfs2_downconvert_thread_do_work() lizf
2016-03-16 8:05 ` [PATCH 3.4 064/107] x86/ldt: Correct LDT access in single stepping logic lizf
2016-03-16 8:05 ` [PATCH 3.4 065/107] x86/ldt: Correct FPU emulation access to LDT lizf
2016-03-16 8:06 ` [PATCH 3.4 066/107] localmodconfig: Use Kbuild files too lizf
2016-03-16 8:06 ` [PATCH 3.4 067/107] dm btree: add ref counting ops for the leaves of top level btrees lizf
2016-03-16 8:06 ` [PATCH 3.4 068/107] libiscsi: Fix host busy blocking during connection teardown lizf
2016-03-16 8:06 ` [PATCH 3.4 069/107] libfc: Fix fc_fcp_cleanup_each_cmd() lizf
2016-03-16 8:06 ` [PATCH 3.4 070/107] EDAC, ppc4xx: Access mci->csrows array elements properly lizf
2016-03-16 8:06 ` [PATCH 3.4 071/107] ipc,sem: fix use after free on IPC_RMID after a task using same semaphore set exits lizf
2016-03-16 8:06 ` [PATCH 3.4 072/107] net: Fix RCU splat in af_key lizf
2016-03-16 8:06 ` [PATCH 3.4 073/107] sctp: donot reset the overall_error_count in SHUTDOWN_RECEIVE state lizf
2016-03-16 8:06 ` [PATCH 3.4 074/107] Revert "usb: dwc3: Reset the transfer resource index on SET_INTERFACE" lizf
2016-03-16 8:06 ` [PATCH 3.4 075/107] unix: avoid use-after-free in ep_remove_wait_queue lizf
2016-03-16 8:06 ` [PATCH 3.4 076/107] pptp: verify sockaddr_len in pptp_bind() and pptp_connect() lizf
2016-03-16 8:06 ` [PATCH 3.4 077/107] net: add validation for the socket syscall protocol argument lizf
2016-03-16 8:06 ` [PATCH 3.4 078/107] RDS: verify the underlying transport exists before creating a connection lizf
2016-03-16 8:06 ` [PATCH 3.4 079/107] RDS: fix race condition when sending a message on unbound socket lizf
2016-03-16 8:06 ` [PATCH 3.4 080/107] sg_start_req(): make sure that there's not too many elements in iovec lizf
2016-03-16 8:06 ` [PATCH 3.4 081/107] virtio-net: drop NETIF_F_FRAGLIST lizf
2016-03-16 8:06 ` [PATCH 3.4 082/107] isdn_ppp: Add checks for allocation failure in isdn_ppp_open() lizf
2016-03-16 8:06 ` [PATCH 3.4 083/107] ppp, slip: Validate VJ compression slot parameters completely lizf
2016-03-16 8:06 ` [PATCH 3.4 084/107] USB: whiteheat: fix potential null-deref at probe lizf
2016-03-16 8:06 ` [PATCH 3.4 085/107] KEYS: Fix race between key destruction and finding a keyring by name lizf
2016-03-16 8:06 ` [PATCH 3.4 086/107] KEYS: Fix crash when attempt to garbage collect an uninstantiated keyring lizf
2016-03-16 8:06 ` [PATCH 3.4 087/107] ipv6: addrconf: validate new MTU before applying it lizf
2016-03-16 8:06 ` [PATCH 3.4 088/107] KVM: x86: work around infinite loop in microcode when #AC is delivered lizf
2016-03-16 8:06 ` [PATCH 3.4 089/107] KVM: svm: unconditionally intercept #DB lizf
2016-03-16 8:06 ` [PATCH 3.4 090/107] get rid of s_files and files_lock lizf
2016-03-16 8:06 ` [PATCH 3.4 091/107] Initialize msg/shm IPC objects before doing ipc_addid() lizf
2016-03-16 8:06 ` [PATCH 3.4 092/107] net: avoid to hang up on sending due to sysctl configuration overflow lizf
2016-03-16 8:06 ` [PATCH 3.4 093/107] ipv6: probe routes asynchronous in rt6_probe lizf
2016-03-16 8:06 ` [PATCH 3.4 094/107] netfilter: nf_conntrack: fix RCU race in nf_conntrack_find_get lizf
2016-03-16 8:06 ` [PATCH 3.4 095/107] atm: deal with setting entry before mkip was called lizf
2016-03-16 8:06 ` [PATCH 3.4 096/107] SUNRPC: never enqueue a ->rq_cong request on ->sending lizf
2016-03-16 8:06 ` [PATCH 3.4 097/107] ipv6: prevent fib6_run_gc() contention lizf
2016-03-16 8:06 ` [PATCH 3.4 098/107] kernel/watchdog.c: touch_nmi_watchdog should only touch local cpu not every one lizf
2016-03-16 14:09 ` Don Zickus
2016-03-17 1:20 ` Zefan Li
2016-03-16 8:06 ` [PATCH 3.4 099/107] net: fix warnings in 'make htmldocs' by moving macro definition out of field declaration lizf
2016-03-16 8:06 ` [PATCH 3.4 100/107] af_unix: Guard against other == sk in unix_dgram_sendmsg lizf
2016-03-16 8:06 ` [PATCH 3.4 101/107] x86/LDT: Print the real LDT base address lizf
2016-03-16 8:06 ` [PATCH 3.4 102/107] ALSA: tlv: compute TLV_*_ITEM lengths automatically lizf
2016-03-16 8:06 ` [PATCH 3.4 103/107] ALSA: tlv: add DECLARE_TLV_DB_RANGE() lizf
2016-03-16 8:06 ` [PATCH 3.4 104/107] ALSA: usb-audio: Add a more accurate volume quirk for AudioQuest DragonFly lizf
2016-03-16 8:06 ` [PATCH 3.4 105/107] usb: dwc3: Fix assignment of EP transfer resources lizf
2016-03-16 8:06 ` [PATCH 3.4 106/107] dm btree remove: fix a bug when rebalancing nodes after removal lizf
2016-03-16 8:06 ` [PATCH 3.4 107/107] KVM: x86: move steal time initialization to vcpu entry time lizf
2016-03-16 17:51 ` [PATCH 3.4 000/107] 3.4.111-rc1 review Guenter Roeck
2016-03-17 1:21 ` Zefan Li
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