From: Ben Hutchings <ben@decadent.org.uk>
To: linux-kernel@vger.kernel.org, stable@vger.kernel.org
Cc: akpm@linux-foundation.org, "Kalle Valo" <kvalo@qca.qualcomm.com>,
"Jason Liu" <r64343@freescale.com>
Subject: [PATCH 3.2 019/104] ath6kl: fix struct hif_scatter_req list handling
Date: Mon, 12 Mar 2018 03:03:34 +0000 [thread overview]
Message-ID: <lsq.1520823814.197939003@decadent.org.uk> (raw)
In-Reply-To: <lsq.1520823814.606620518@decadent.org.uk>
3.2.101-rc1 review patch. If anyone has any objections, please let me know.
------------------
From: Kalle Valo <kvalo@qca.qualcomm.com>
commit 31b9cc9a873dcab161999622314f98a75d838975 upstream.
Jason noticed that with Yocto GCC 4.8.1 ath6kl crashes with this iperf command:
iperf -c $TARGET_IP -i 5 -t 50 -w 1M
The crash was:
Unable to handle kernel paging request at virtual address 1a480000
pgd = 80004000
[1a480000] *pgd=00000000
Internal error: Oops: 805 [#1] SMP ARM
Modules linked in: ath6kl_sdio ath6kl_core [last unloaded: ath6kl_core]
CPU: 0 PID: 1953 Comm: kworker/u4:0 Not tainted 3.10.9-1.0.0_alpha+dbf364b #1
Workqueue: ath6kl ath6kl_sdio_write_async_work [ath6kl_sdio]
task: dcc9a680 ti: dc9ae000 task.ti: dc9ae000
PC is at v7_dma_clean_range+0x20/0x38
LR is at dma_cache_maint_page+0x50/0x54
pc : [<8001a6f8>] lr : [<800170fc>] psr: 20000093
sp : dc9afcf8 ip : 8001a748 fp : 00000004
r10: 00000000 r9 : 00000001 r8 : 00000000
r7 : 00000001 r6 : 00000000 r5 : 80cb7000 r4 : 03f9a480
r3 : 0000001f r2 : 00000020 r1 : 1a480000 r0 : 1a480000
Flags: nzCv IRQs off FIQs on Mode SVC_32 ISA ARM Segment kernel
Control: 10c53c7d Table: 6cc5004a DAC: 00000015
Process kworker/u4:0 (pid: 1953, stack limit = 0xdc9ae238)
Stack: (0xdc9afcf8 to 0xdc9b0000)
fce0: 80c9b29c 00000000
fd00: 00000000 80017134 8001a748 dc302ac0 00000000 00000000 dc454a00 80c12ed8
fd20: dc115410 80017238 00000000 dc454a10 00000001 80017588 00000001 00000000
fd40: 00000000 dc302ac0 dc9afe38 dc9afe68 00000004 80c12ed8 00000000 dc454a00
fd60: 00000004 80436f88 00000000 00000000 00000600 0000ffff 0000000c 80c113c4
fd80: 80c9b29c 00000001 00000004 dc115470 60000013 dc302ac0 dc46e000 dc302800
fda0: dc9afe10 dc302b78 60000013 dc302ac0 dc46e000 00000035 dc46e5b0 80438c90
fdc0: dc9afe10 dc302800 dc302800 dc9afe68 dc9afe38 80424cb4 00000005 dc9afe10
fde0: dc9afe20 80424de8 dc9afe10 dc302800 dc46e910 80424e90 dc473c00 dc454f00
fe00: 000001b5 7f619d64 dcc7c830 00000000 00000000 dc9afe38 dc9afe68 00000000
fe20: 00000000 00000000 dc9afe28 dc9afe28 80424d80 00000000 00000035 9cac0034
fe40: 00000000 00000000 00000000 00000000 000001b5 00000000 00000000 00000000
fe60: dc9afe68 dc9afe10 3b9aca00 00000000 00000080 00000034 00000000 00000100
fe80: 00000000 00000000 dc9afe10 00000004 dc454a00 00000000 dc46e010 dc46e96c
fea0: dc46e000 dc46e964 00200200 00100100 dc46e910 7f619ec0 00000600 80c0e770
fec0: dc15a900 dcc7c838 00000000 dc46e954 8042d434 dcc44680 dc46e954 dc004400
fee0: dc454500 00000000 00000000 dc9ae038 dc004400 8003c450 dcc44680 dc004414
ff00: dc46e954 dc454500 00000001 dcc44680 dc004414 dcc44698 dc9ae000 dc9ae030
ff20: 00000001 dc9ae000 dc004400 8003d158 8003d020 00000000 00000000 80c53941
ff40: dc9aff64 dcb71ea0 00000000 dcc44680 8003d020 00000000 00000000 00000000
ff60: 00000000 80042480 00000000 00000000 000000f8 dcc44680 00000000 00000000
ff80: dc9aff80 dc9aff80 00000000 00000000 dc9aff90 dc9aff90 dc9affac dcb71ea0
ffa0: 800423cc 00000000 00000000 8000e018 00000000 00000000 00000000 00000000
ffc0: 00000000 00000000 00000000 00000000 00000000 00000000 00000000 00000000
ffe0: 00000000 00000000 00000000 00000000 00000013 00000000 00000000 00000000
[<8001a6f8>] (v7_dma_clean_range+0x20/0x38) from [<800170fc>] (dma_cache_maint_page+0x50/0x54)
[<800170fc>] (dma_cache_maint_page+0x50/0x54) from [<80017134>] (__dma_page_cpu_to_dev+0x34/0x9c)
[<80017134>] (__dma_page_cpu_to_dev+0x34/0x9c) from [<80017238>] (arm_dma_map_page+0x64/0x68)
[<80017238>] (arm_dma_map_page+0x64/0x68) from [<80017588>] (arm_dma_map_sg+0x7c/0xf4)
[<80017588>] (arm_dma_map_sg+0x7c/0xf4) from [<80436f88>] (sdhci_send_command+0x894/0xe00)
[<80436f88>] (sdhci_send_command+0x894/0xe00) from [<80438c90>] (sdhci_request+0xc0/0x1ec)
[<80438c90>] (sdhci_request+0xc0/0x1ec) from [<80424cb4>] (mmc_start_request+0xb8/0xd4)
[<80424cb4>] (mmc_start_request+0xb8/0xd4) from [<80424de8>] (__mmc_start_req+0x60/0x84)
[<80424de8>] (__mmc_start_req+0x60/0x84) from [<80424e90>] (mmc_wait_for_req+0x10/0x20)
[<80424e90>] (mmc_wait_for_req+0x10/0x20) from [<7f619d64>] (ath6kl_sdio_scat_rw.isra.10+0x1dc/0x240 [ath6kl_sdio])
[<7f619d64>] (ath6kl_sdio_scat_rw.isra.10+0x1dc/0x240 [ath6kl_sdio]) from [<7f619ec0>] (ath6kl_sdio_write_async_work+0x5c/0x104 [ath6kl_sdio])
[<7f619ec0>] (ath6kl_sdio_write_async_work+0x5c/0x104 [ath6kl_sdio]) from [<8003c450>] (process_one_work+0x10c/0x370)
[<8003c450>] (process_one_work+0x10c/0x370) from [<8003d158>] (worker_thread+0x138/0x3fc)
[<8003d158>] (worker_thread+0x138/0x3fc) from [<80042480>] (kthread+0xb4/0xb8)
[<80042480>] (kthread+0xb4/0xb8) from [<8000e018>] (ret_from_fork+0x14/0x3c)
Code: e1a02312 e2423001 e1c00003 f57ff04f (ee070f3a)
---[ end trace 0c038f0b8e0b67a3 ]---
Kernel panic - not syncing: Fatal exception
Jason's analysis:
"The GCC 4.8.1 compiler will not do the for-loop till scat_entries, instead,
it only run one round loop. This may be caused by that the GCC 4.8.1 thought
that the scat_list only have one item and then no need to do full iteration,
but this is simply wrong by looking at the assebly code. This will cause the sg
buffer not get set when scat_entries > 1 and thus lead to kernel panic.
Note: This issue not observed with GCC 4.7.2, only found on the GCC 4.8.1)"
Fix this by using the normal [0] style for defining unknown number of list
entries following the struct. This also fixes corruption with scat_q_depth, which
was mistankely added to the end of struct and overwritten if there were more
than item in the scat list.
Reported-by: Jason Liu <r64343@freescale.com>
Tested-by: Jason Liu <r64343@freescale.com>
Signed-off-by: Kalle Valo <kvalo@qca.qualcomm.com>
[bwh: Backported to 3.2: There's no scat_q_depth field]
Signed-off-by: Ben Hutchings <ben@decadent.org.uk>
---
--- a/drivers/net/wireless/ath/ath6kl/hif.h
+++ b/drivers/net/wireless/ath/ath6kl/hif.h
@@ -183,7 +183,7 @@ struct hif_scatter_req {
/* bounce buffer for upper layers to copy to/from */
u8 *virt_dma_buf;
- struct hif_scatter_item scat_list[1];
+ struct hif_scatter_item scat_list[0];
};
struct ath6kl_hif_ops {
--- a/drivers/net/wireless/ath/ath6kl/sdio.c
+++ b/drivers/net/wireless/ath/ath6kl/sdio.c
@@ -319,7 +319,7 @@ static int ath6kl_sdio_alloc_prep_scat_r
int i, scat_req_sz, scat_list_sz, sg_sz, buf_sz;
u8 *virt_buf;
- scat_list_sz = (n_scat_entry - 1) * sizeof(struct hif_scatter_item);
+ scat_list_sz = n_scat_entry * sizeof(struct hif_scatter_item);
scat_req_sz = sizeof(*s_req) + scat_list_sz;
if (!virt_scat)
next prev parent reply other threads:[~2018-03-12 3:23 UTC|newest]
Thread overview: 106+ messages / expand[flat|nested] mbox.gz Atom feed top
2018-03-12 3:03 [PATCH 3.2 000/104] 3.2.101-rc1 review Ben Hutchings
2018-03-12 3:03 ` [PATCH 3.2 044/104] x86/cpufeatures: Add X86_BUG_SPECTRE_V[12] Ben Hutchings
2018-03-12 3:03 ` [PATCH 3.2 017/104] SELinux: security_load_policy: Silence frame-larger-than warning Ben Hutchings
2018-03-12 3:03 ` [PATCH 3.2 033/104] x86, asm: Extend definitions of _ASM_* with a raw format Ben Hutchings
2018-03-12 3:03 ` [PATCH 3.2 036/104] x86/alternatives: Add missing '\n' at end of ALTERNATIVE inline asm Ben Hutchings
2018-03-12 3:03 ` [PATCH 3.2 073/104] x86/retpoline: Optimize inline assembler for vmexit_fill_RSB Ben Hutchings
2018-03-12 3:03 ` [PATCH 3.2 047/104] x86/cpu: Implement CPU vulnerabilites sysfs functions Ben Hutchings
2018-03-12 3:03 ` [PATCH 3.2 016/104] gcov: compile specific gcov implementation based on gcc version Ben Hutchings
2018-03-12 3:03 ` [PATCH 3.2 007/104] rtlwifi: rtl8192c: Fix W=1 warning Ben Hutchings
2018-03-12 3:03 ` [PATCH 3.2 025/104] atp: remove set_rx_mode_8012() Ben Hutchings
2018-03-12 3:03 ` [PATCH 3.2 072/104] x86/pti: Document fix wrong index Ben Hutchings
2018-03-12 3:03 ` [PATCH 3.2 046/104] sysfs/cpu: Add vulnerability folder Ben Hutchings
2018-03-12 3:03 ` [PATCH 3.2 001/104] brcmfmac: work-around gcc 4.7 build issue Ben Hutchings
2018-03-12 3:03 ` [PATCH 3.2 041/104] x86/cpufeatures: Add X86_BUG_CPU_INSECURE Ben Hutchings
2018-03-12 3:03 ` [PATCH 3.2 085/104] x86: Introduce barrier_nospec Ben Hutchings
2018-03-12 3:03 ` [PATCH 3.2 056/104] kconfig.h: use __is_defined() to check if MODULE is defined Ben Hutchings
2018-03-12 3:03 ` [PATCH 3.2 042/104] x86/cpu, x86/pti: Do not enable PTI on AMD processors Ben Hutchings
2018-03-12 3:03 ` [PATCH 3.2 052/104] x86/alternatives: Fix optimize_nops() checking Ben Hutchings
2018-03-12 3:03 ` [PATCH 3.2 003/104] rtlwifi: rtl8192se: Fix gcc 4.7.x warning Ben Hutchings
2018-03-12 3:03 ` [PATCH 3.2 088/104] vfs, fdtable: Prevent bounds-check bypass via speculative execution Ben Hutchings
2018-03-12 3:03 ` [PATCH 3.2 101/104] x86: Introduce __uaccess_begin_nospec() and uaccess_try_nospec Ben Hutchings
2018-03-12 3:03 ` [PATCH 3.2 068/104] x86/retpoline: Add LFENCE to the retpoline/RSB filling RSB macros Ben Hutchings
2018-03-12 3:03 ` [PATCH 3.2 079/104] x86/bugs: Drop one "mitigation" from dmesg Ben Hutchings
2018-03-12 3:03 ` [PATCH 3.2 070/104] kprobes/x86: Blacklist indirect thunk functions for kprobes Ben Hutchings
2018-03-12 3:03 ` [PATCH 3.2 089/104] x86/spectre: Report get_user mitigation for spectre_v1 Ben Hutchings
2018-03-12 3:03 ` [PATCH 3.2 091/104] x86/paravirt: Remove 'noreplace-paravirt' cmdline option Ben Hutchings
2018-03-12 3:03 ` [PATCH 3.2 008/104] rtlwifi: rtl8192de: Fix W=1 build warnings Ben Hutchings
2018-03-12 3:03 ` [PATCH 3.2 054/104] x86/cpu/AMD: Use LFENCE_RDTSC in preference to MFENCE_RDTSC Ben Hutchings
2018-03-12 3:03 ` [PATCH 3.2 009/104] rtl8192c:dm: Properly initialize local array and set value Ben Hutchings
2018-03-12 3:03 ` [PATCH 3.2 075/104] x86/retpoline: Fill RSB on context switch for affected CPUs Ben Hutchings
2018-03-12 3:03 ` [PATCH 3.2 005/104] ath6kl: fix uninitialized variable in ath6kl_sdio_enable_scatter() Ben Hutchings
2018-03-12 3:03 ` [PATCH 3.2 076/104] x86/retpoline: Remove the esp/rsp thunk Ben Hutchings
2018-03-12 3:03 ` [PATCH 3.2 092/104] x86/kvm: Update spectre-v1 mitigation Ben Hutchings
2018-03-12 3:03 ` [PATCH 3.2 018/104] gcov: add support for GCC 4.9 Ben Hutchings
2018-03-12 3:03 ` [PATCH 3.2 012/104] usb: renesas_usbhs: fixup __usbhs_for_each_pipe 1st pos Ben Hutchings
2018-03-12 3:03 ` [PATCH 3.2 071/104] kprobes/x86: Disable optimizing on the function jumps to indirect thunk Ben Hutchings
2018-03-12 3:03 ` [PATCH 3.2 080/104] x86/cpu/bugs: Make retpoline module warning conditional Ben Hutchings
2018-03-12 3:03 ` [PATCH 3.2 065/104] x86/retpoline/irq32: Convert assembler indirect jumps Ben Hutchings
2018-03-12 3:03 ` [PATCH 3.2 094/104] x86/spectre: Simplify spectre_v2 command line parsing Ben Hutchings
2018-03-12 3:03 ` [PATCH 3.2 030/104] KVM: VMX: Make use of asm.h Ben Hutchings
2018-03-12 3:03 ` [PATCH 3.2 050/104] x86/alternatives: Fix ALTERNATIVE_2 padding generation properly Ben Hutchings
2018-03-12 3:03 ` [PATCH 3.2 069/104] retpoline: Introduce start/end markers of indirect thunk Ben Hutchings
2018-03-12 3:03 ` [PATCH 3.2 035/104] x86: Add another set of MSR accessor functions Ben Hutchings
2018-03-12 3:03 ` [PATCH 3.2 100/104] nospec: Include <asm/barrier.h> dependency Ben Hutchings
2018-03-12 3:03 ` [PATCH 3.2 082/104] Documentation: Document array_index_nospec Ben Hutchings
2018-03-12 3:03 ` [PATCH 3.2 034/104] bitops: Introduce BIT_ULL Ben Hutchings
2018-03-12 3:03 ` [PATCH 3.2 049/104] x86/alternatives: Guard NOPs optimization Ben Hutchings
2018-03-12 3:03 ` [PATCH 3.2 095/104] x86/speculation: Fix typo IBRS_ATT, which should be IBRS_ALL Ben Hutchings
2018-03-12 3:03 ` [PATCH 3.2 062/104] x86/retpoline/hyperv: Convert assembler indirect jumps Ben Hutchings
2018-03-12 3:03 ` [PATCH 3.2 038/104] x86/Documentation: Add PTI description Ben Hutchings
2018-03-12 3:03 ` [PATCH 3.2 090/104] x86/spectre: Fix spelling mistake: "vunerable"-> "vulnerable" Ben Hutchings
2018-03-12 3:03 ` [PATCH 3.2 077/104] module/retpoline: Warn about missing retpoline in module Ben Hutchings
2018-03-12 3:03 ` [PATCH 3.2 074/104] x86/cpu/intel: Introduce macros for Intel family numbers Ben Hutchings
2018-03-12 3:03 ` [PATCH 3.2 097/104] x86/spectre: Fix an error message Ben Hutchings
2018-03-12 3:03 ` [PATCH 3.2 048/104] sysfs/cpu: Fix typos in vulnerability documentation Ben Hutchings
2018-03-12 3:03 ` [PATCH 3.2 087/104] x86/syscall: Sanitize syscall table de-references under speculation Ben Hutchings
2018-03-12 3:03 ` [PATCH 3.2 102/104] x86/uaccess: Use __uaccess_begin_nospec() and uaccess_try_nospec Ben Hutchings
2018-03-12 3:03 ` [PATCH 3.2 032/104] x86, cpu: Expand cpufeature facility to include cpu bugs Ben Hutchings
2018-03-12 3:03 ` [PATCH 3.2 015/104] gcov: add support for gcc 4.7 gcov format Ben Hutchings
2018-03-12 3:03 ` [PATCH 3.2 051/104] x86/alternatives: Make optimize_nops() interrupt safe and synced Ben Hutchings
2018-03-12 3:03 ` [PATCH 3.2 024/104] [media] budget-av: only use t_state if initialized Ben Hutchings
2018-03-12 3:03 ` [PATCH 3.2 098/104] nospec: Move array_index_nospec() parameter checking into separate macro Ben Hutchings
2018-03-12 3:03 ` [PATCH 3.2 014/104] gcov: move gcov structs definitions to a gcc version specific file Ben Hutchings
2018-03-12 3:03 ` [PATCH 3.2 028/104] x86/bitops: Move BIT_64() for a wider use Ben Hutchings
2018-03-12 3:03 ` [PATCH 3.2 026/104] staging/wlan-ng: Fix 'Branch condition evaluates to a garbage value' in p80211netdev.c Ben Hutchings
2018-03-12 3:03 ` [PATCH 3.2 060/104] x86/retpoline/entry: Convert entry assembler indirect jumps Ben Hutchings
2018-03-12 3:03 ` [PATCH 3.2 031/104] KVM: SVM: Make use of asm.h Ben Hutchings
2018-03-12 3:03 ` [PATCH 3.2 020/104] modpost: reduce visibility of symbols and constify r/o arrays Ben Hutchings
2018-03-12 3:03 ` [PATCH 3.2 099/104] nospec: Kill array_index_nospec_mask_check() Ben Hutchings
2018-03-12 3:03 ` [PATCH 3.2 063/104] x86/retpoline/xen: Convert Xen hypercall indirect jumps Ben Hutchings
2018-03-12 3:03 ` [PATCH 3.2 022/104] fs: namespace: suppress 'may be used uninitialized' warnings Ben Hutchings
2018-03-12 3:03 ` [PATCH 3.2 064/104] x86/retpoline/checksum32: Convert assembler indirect jumps Ben Hutchings
2018-03-12 3:03 ` [PATCH 3.2 040/104] x86/cpufeatures: Make CPU bugs sticky Ben Hutchings
2018-03-12 3:03 ` Ben Hutchings [this message]
2018-03-12 3:03 ` [PATCH 3.2 086/104] x86/get_user: Use pointer masking to limit speculation Ben Hutchings
2018-03-12 3:03 ` [PATCH 3.2 002/104] Bluetooth: Remove unused hci_le_ltk_reply() Ben Hutchings
2018-03-12 3:03 ` [PATCH 3.2 061/104] x86/retpoline/ftrace: Convert ftrace assembler indirect jumps Ben Hutchings
2018-03-12 3:03 ` [PATCH 3.2 006/104] Turn off -Wmaybe-uninitialized when building with -Os Ben Hutchings
2018-03-12 3:03 ` [PATCH 3.2 039/104] x86/cpu: Factor out application of forced CPU caps Ben Hutchings
2018-03-12 3:03 ` [PATCH 3.2 011/104] Removed unused typedef to avoid "unused local typedef" warnings Ben Hutchings
2018-03-12 3:03 ` [PATCH 3.2 103/104] x86: fix build warnign with 32-bit PAE Ben Hutchings
2018-03-12 3:03 ` [PATCH 3.2 053/104] x86/cpu/AMD: Make LFENCE a serializing instruction Ben Hutchings
2018-03-12 3:03 ` [PATCH 3.2 027/104] kconfig: fix IS_ENABLED to not require all options to be defined Ben Hutchings
2018-03-12 3:03 ` [PATCH 3.2 021/104] modpost: don't emit section mismatch warnings for compiler optimizations Ben Hutchings
2018-03-12 3:03 ` [PATCH 3.2 055/104] x86/asm: Make asm/alternative.h safe from assembly Ben Hutchings
2018-03-12 3:03 ` [PATCH 3.2 078/104] x86/nospec: Fix header guards names Ben Hutchings
2018-03-12 3:03 ` [PATCH 3.2 045/104] x86/cpu: Merge bugs.c and bugs_64.c Ben Hutchings
2018-03-12 3:03 ` [PATCH 3.2 029/104] x86, alternative: Add header guards to <asm/alternative-asm.h> Ben Hutchings
2018-03-12 3:03 ` [PATCH 3.2 023/104] [media] max2165: trival fix for some -Wuninitialized warning Ben Hutchings
2018-03-12 3:03 ` [PATCH 3.2 083/104] array_index_nospec: Sanitize speculative array de-references Ben Hutchings
2018-03-12 3:03 ` [PATCH 3.2 067/104] x86/retpoline: Remove compile time warning Ben Hutchings
2018-03-12 3:03 ` [PATCH 3.2 043/104] x86/pti: Rename BUG_CPU_INSECURE to BUG_CPU_MELTDOWN Ben Hutchings
2018-03-12 3:03 ` [PATCH 3.2 096/104] x86/cpufeatures: Clean up Spectre v2 related CPUID flags Ben Hutchings
2018-03-12 3:03 ` [PATCH 3.2 057/104] x86/asm: Use register variable to get stack pointer value Ben Hutchings
2018-03-12 3:03 ` [PATCH 3.2 058/104] x86/retpoline: Add initial retpoline support Ben Hutchings
2018-03-12 3:03 ` [PATCH 3.2 013/104] usb: renesas_usbhs: tidyup original usbhsx_for_each_xxx macro Ben Hutchings
2018-03-12 3:03 ` [PATCH 3.2 059/104] x86/spectre: Add boot time option to select Spectre v2 mitigation Ben Hutchings
2018-03-12 3:03 ` [PATCH 3.2 004/104] brcm80211: Remove bogus memcpy in ai_detach Ben Hutchings
2018-03-12 3:03 ` [PATCH 3.2 104/104] cris: Remove old legacy "-traditional" flag from arch-v10/lib/Makefile Ben Hutchings
2018-03-12 3:03 ` [PATCH 3.2 084/104] x86: Implement array_index_mask_nospec Ben Hutchings
2018-03-12 3:03 ` [PATCH 3.2 066/104] x86/retpoline: Fill return stack buffer on vmexit Ben Hutchings
2018-03-12 3:03 ` [PATCH 3.2 037/104] kvm: vmx: Scrub hardware GPRs at VM-exit Ben Hutchings
2018-03-12 3:03 ` [PATCH 3.2 093/104] x86/retpoline: Avoid retpolines for built-in __init functions Ben Hutchings
2018-03-12 3:03 ` [PATCH 3.2 010/104] rtlwifi: initialize local array and set value Ben Hutchings
2018-03-12 14:54 ` [PATCH 3.2 000/104] 3.2.101-rc1 review Guenter Roeck
2018-03-12 19:53 ` Ben Hutchings
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