Ramya Gnanasekar <quic_rgnanase@xxxxxxxxxxx> writes: > Bring in the basic infrastructure necessary for enabling htt_stats via debugfs. > Patch series bring support to request stats type to firmware, dump the stats > and request to reset the stats from firmware. > > Schema with one ath12k device: > > ath12k > `-- pci-0000:06:00.0 > |-- mac0 > `-- htt_stats > |-- htt_stats_type > |-- htt_stats_reset > > Dinesh Karthikeyan (3): > wifi: ath12k: Add support to enable debugfs_htt_stats > wifi: ath12k: Add htt_stats_dump file ops support > wifi: ath12k: Add support to parse requested stats_type > > Lingbo Kong (1): > wifi: ath12k: Fix Pdev id in HTT stats request for WCN7850 > > Ramya Gnanasekar (1): > wifi: ath12k: Dump additional Tx PDEV HTT stats I did a quick test with WCN7850: cd /sys/kernel/debug/ath12k/pci-0000:06:00.0/mac0 echo 1 > htt_stats_type cat htt_stats And in the dmesg I see: [ 178.634501] ================================================================== [ 178.634870] BUG: KASAN: slab-out-of-bounds in skip_spaces+0x105/0x110 [ 178.635156] Read of size 1 at addr ffff888109d4696a by task bash/1474 [ 178.635367] [ 178.635513] CPU: 1 PID: 1474 Comm: bash Not tainted 6.9.0-wt-ath+ #1523 [ 178.635747] Hardware name: Intel(R) Client Systems NUC8i7HVK/NUC8i7HVB, BIOS HNKBLi70.86A.0067.2021.0528.1339 05/28/2021 [ 178.636078] Call Trace: [ 178.636238] <TASK> [ 178.636393] dump_stack_lvl+0x7d/0xe0 [ 178.636578] print_address_description.constprop.0+0x33/0x3a0 [ 178.636786] print_report+0xb5/0x260 [ 178.637004] ? kasan_complete_mode_report_info+0x3c/0x1a0 [ 178.637211] kasan_report+0xd8/0x110 [ 178.637353] ? skip_spaces+0x105/0x110 [ 178.637392] ? skip_spaces+0x105/0x110 [ 178.637433] __asan_report_load1_noabort+0x14/0x20 [ 178.637488] skip_spaces+0x105/0x110 [ 178.637526] vsscanf+0x3e9/0x3100 [ 178.637573] ? ip6_compressed_string+0xb80/0xb80 [ 178.637614] ? debug_smp_processor_id+0x17/0x20 [ 178.637655] ? __lock_release.isra.0+0x49c/0xae0 [ 178.637696] ? reacquire_held_locks+0x4d0/0x4d0 [ 178.637736] ? lock_sync+0x1a0/0x1a0 [ 178.637774] sscanf+0xa6/0xd0 [ 178.637809] ? vsscanf+0x3100/0x3100 [ 178.637846] ? __might_fault+0x119/0x170 [ 178.637933] ? __might_fault+0xc0/0x170 [ 178.637983] ? __kasan_check_write+0x14/0x20 [ 178.638023] ath12k_write_htt_stats_type+0x122/0x330 [ath12k] [ 178.638092] ? ath12k_open_htt_stats+0xbe0/0xbe0 [ath12k] [ 178.638515] full_proxy_write+0xf8/0x180 [ 178.638563] vfs_write+0x220/0x1200 [ 178.638601] ? do_user_addr_fault+0x3f5/0xbb0 [ 178.638640] ? reacquire_held_locks+0x220/0x4d0 [ 178.638680] ? kernel_write+0x680/0x680 [ 178.638720] ? __kasan_check_read+0x11/0x20 [ 178.638757] ? __fget_light+0x53/0x1e0 [ 178.638796] ksys_write+0x10e/0x230 [ 178.638833] ? __ia32_sys_read+0xa0/0xa0 [ 178.638917] ? debug_smp_processor_id+0x17/0x20 [ 178.638959] __x64_sys_write+0x6d/0xa0 [ 178.638997] ? lockdep_hardirqs_on+0x7d/0x100 [ 178.639036] x64_sys_call+0x9cf/0x9e0 [ 178.639073] do_syscall_64+0x65/0x130 [ 178.639111] entry_SYSCALL_64_after_hwframe+0x4b/0x53 [ 178.639721] RIP: 0033:0x7f35ca96b297 [ 178.640363] Code: 64 89 02 48 c7 c0 ff ff ff ff eb bb 0f 1f 80 00 00 00 00 f3 0f 1e fa 64 8b 04 25 18 00 00 00 85 c0 75 10 b8 01 00 00 00 0f 05 <48> 3d 00 f0 ff ff 77 51 c3 48 83 ec 28 48 89 54 24 18 48 89 74 24 [ 178.641642] RSP: 002b:00007fff7addfa38 EFLAGS: 00000246 ORIG_RAX: 0000000000000001 [ 178.642327] RAX: ffffffffffffffda RBX: 0000000000000002 RCX: 00007f35ca96b297 [ 178.643013] RDX: 0000000000000002 RSI: 000055c737df4390 RDI: 0000000000000001 [ 178.643652] RBP: 000055c737df4390 R08: 000000000000000a R09: 0000000000000001 [ 178.644332] R10: 000055c703828017 R11: 0000000000000246 R12: 0000000000000002 [ 178.645010] R13: 00007f35caa4a6a0 R14: 00007f35caa464a0 R15: 00007f35caa458a0 [ 178.645643] </TASK> [ 178.646321] [ 178.646984] Allocated by task 1474 on cpu 1 at 178.634368s: [ 178.647616] kasan_save_stack+0x26/0x50 [ 178.648290] kasan_save_track+0x18/0x60 [ 178.648955] kasan_save_alloc_info+0x37/0x40 [ 178.649560] __kasan_kmalloc+0x90/0xa0 [ 178.650197] __kmalloc+0x1be/0x3f0 [ 178.650765] ath12k_write_htt_stats_type+0xc1/0x330 [ath12k] [ 178.651408] full_proxy_write+0xf8/0x180 [ 178.652029] vfs_write+0x220/0x1200 [ 178.652583] ksys_write+0x10e/0x230 [ 178.653181] __x64_sys_write+0x6d/0xa0 [ 178.653726] x64_sys_call+0x9cf/0x9e0 [ 178.654319] do_syscall_64+0x65/0x130 [ 178.654844] entry_SYSCALL_64_after_hwframe+0x4b/0x53 [ 178.655410] [ 178.655970] The buggy address belongs to the object at ffff888109d46968#012[ 178.655970] which belongs to the cache kmalloc-8 of size 8 [ 178.657054] The buggy address is located 0 bytes to the right of#012[ 178.657054] allocated 2-byte region [ffff888109d46968, ffff888109d4696a) [ 178.658142] [ 178.658668] The buggy address belongs to the physical page: [ 178.659256] page: refcount:1 mapcount:0 mapping:0000000000000000 index:0xffff888109d46a08 pfn:0x109d46 [ 178.659824] flags: 0x200000000000a00(workingset|slab|node=0|zone=2) [ 178.660438] page_type: 0xffffffff() [ 178.661053] raw: 0200000000000a00 ffff88810004c3c0 ffffea0004275850 ffff8881000403d0 [ 178.661637] raw: ffff888109d46a08 0000000000190010 00000001ffffffff 0000000000000000 [ 178.662265] page dumped because: kasan: bad access detected [ 178.662872] [ 178.663475] Memory state around the buggy address: [ 178.664108] ffff888109d46800: fc fc fc fc fc fa fc fc fc fc fc fc fc fc fc fc [ 178.664710] ffff888109d46880: fc fc fc fc fc fc fc fc fc fa fc fc fc fc fc fc [ 178.665972] >ffff888109d46900: fc fc fc fc fc fc fc fc fc fc fc fc fc 02 fc fc [ 178.666571] ^ [ 178.667223] ffff888109d46980: fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc [ 178.667836] ffff888109d46a00: fc fa fc fc fc fc fc fc fc fc fc fc fc fc fc fc [ 178.668488] ================================================================== [ 178.669233] Disabling lock debugging due to kernel taint -- https://patchwork.kernel.org/project/linux-wireless/list/ https://wireless.wiki.kernel.org/en/developers/documentation/submittingpatches
