search for: dump_stack

...in: [ 31.116101] CPU: 0 PID: 2823 Comm: kexec Not tainted 4.10.0+ #6941 [ 31.118911] Hardware name: Generic DT based system [ 31.121319] [<c022fb78>] (unwind_backtrace) from [<c0229d8c>] (show_stack+0x18/0x1c) [ 31.125017] [<c0229d8c>] (show_stack) from [<c05192f4>] (dump_stack+0x84/0x98) [ 31.128427] [<c05192f4>] (dump_stack) from [<c023d940>] (__warn+0xf4/0x10c) [ 31.131910] [<c023d940>] (__warn) from [<c023da20>] (warn_slowpath_null+0x28/0x30) [ 31.135543] [<c023da20>] (warn_slowpath_null) from [<c0290238>] (__free_irq+0x2c4/0x...

...in: [ 31.116101] CPU: 0 PID: 2823 Comm: kexec Not tainted 4.10.0+ #6941 [ 31.118911] Hardware name: Generic DT based system [ 31.121319] [<c022fb78>] (unwind_backtrace) from [<c0229d8c>] (show_stack+0x18/0x1c) [ 31.125017] [<c0229d8c>] (show_stack) from [<c05192f4>] (dump_stack+0x84/0x98) [ 31.128427] [<c05192f4>] (dump_stack) from [<c023d940>] (__warn+0xf4/0x10c) [ 31.131910] [<c023d940>] (__warn) from [<c023da20>] (warn_slowpath_null+0x28/0x30) [ 31.135543] [<c023da20>] (warn_slowpath_null) from [<c0290238>] (__free_irq+0x2c4/0x...

........E this was on the host console [ 55.951885] CPU: 34 PID: 1908 Comm: CPU 0/KVM Not tainted 5.5.0+ #21 [ 55.951891] Hardware name: IBM 3906 M04 704 (LPAR) [ 55.951892] Call Trace: [ 55.951902] [<0000001ede114132>] show_stack+0x8a/0xd0 [ 55.951906] [<0000001edeb0672a>] dump_stack+0x8a/0xb8 [ 55.951915] [<000003ff803736a6>] vhost_vring_ioctl+0x6fe/0x858 [vhost] [ 55.951919] [<000003ff8042a608>] vhost_net_ioctl+0x510/0x570 [vhost_net] [ 55.951924] [<0000001ede3c4dd8>] do_vfs_ioctl+0x430/0x6f8 [ 55.951926] [<0000001ede3c5124>] ksys_ioctl...

...nux/drivers/gpu/drm/virtio/virtgpu_vq.c:381) [ 37.714650] [ 37.714650] stack backtrace: [ 37.715140] CPU: 0 PID: 1869 Comm: Xorg Not tainted 5.5.0-rc5+ #605 [ 37.715889] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS 1.12.0-1 04/01/2014 [ 37.718253] Call Trace: [ 37.718596] dump_stack (linux/lib/dump_stack.c:120) [ 37.719011] dma_resv_add_excl_fence (linux/./include/linux/dma-resv.h:246 linux/drivers/dma-buf/dma-resv.c:273) [...] [ 37.720278] virtio_gpu_array_add_fence (linux/drivers/gpu/drm/virtio/virtgpu_gem.c:230 (discriminator 3)) [ 37.720925] virtio_gpu_queue_fenced_c...

...gt; [ 55.951885] CPU: 34 PID: 1908 Comm: CPU 0/KVM Not tainted 5.5.0+ #21 >> [ 55.951891] Hardware name: IBM 3906 M04 704 (LPAR) >> [ 55.951892] Call Trace: >> [ 55.951902] [<0000001ede114132>] show_stack+0x8a/0xd0 >> [ 55.951906] [<0000001edeb0672a>] dump_stack+0x8a/0xb8 >> [ 55.951915] [<000003ff803736a6>] vhost_vring_ioctl+0x6fe/0x858 [vhost] >> [ 55.951919] [<000003ff8042a608>] vhost_net_ioctl+0x510/0x570 [vhost_net] >> [ 55.951924] [<0000001ede3c4dd8>] do_vfs_ioctl+0x430/0x6f8 >> [ 55.951926] [<...

Hi: This small series try to fix several bugs of ptr_ring usage in vhost_net. Please review. Thanks Alexander Potapenko (1): vhost_net: initialize rx_ring in vhost_net_open() Jason Wang (2): vhost_net: keep private_data and rx_ring synced vhost_net: examine pointer types during un-producing drivers/net/tun.c | 3 ++- drivers/vhost/net.c | 8 +++++--- include/linux/if_tun.h | 4

...======================================== BUG: KMSAN: use of uninitialized memory in vhost_net_buf_unproduce+0x7bb/0x9a0 drivers/vho et.c:170 CPU: 0 PID: 3021 Comm: syz-fuzzer Not tainted 4.16.0-rc4+ #3853 Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS 1.10.2-1 04/01/2014 Call Trace: __dump_stack lib/dump_stack.c:17 [inline] dump_stack+0x185/0x1d0 lib/dump_stack.c:53 kmsan_report+0x142/0x1f0 mm/kmsan/kmsan.c:1093 __msan_warning_32+0x6c/0xb0 mm/kmsan/kmsan_instr.c:676 vhost_net_buf_unproduce+0x7bb/0x9a0 drivers/vhost/net.c:170 vhost_net_stop_vq drivers/vhost/net.c:974 [inline] vhost_ne...

...: Dell Inc. PowerEdge R715/00XHKG, BIOS 1.5.2 04/19/2011 ffffffffa0198323 ffff88007c9ebd08 ffffffff81796b73 ffff88007c9ebd48 ffffffff8103d66b 000000007b773e20 ffff8800779f0000 ffff8800779f43f0 ffff8800779f8418 000000000000015c 0000000000000062 ffff88007c9ebd58 Call Trace: [<ffffffff81796b73>] dump_stack+0x19/0x1e [<ffffffff8103d66b>] warn_slowpath_common+0x6b/0xa0 [<ffffffff8103d6b5>] warn_slowpath_null+0x15/0x20 [<ffffffffa0197627>] handle_tx+0x477/0x4b0 [vhost_net] [<ffffffffa0197690>] handle_tx_kick+0x10/0x20 [vhost_net] [<ffffffffa019541e>] vhost_worker+0xfe/0x1a0...

...: Dell Inc. PowerEdge R715/00XHKG, BIOS 1.5.2 04/19/2011 ffffffffa0198323 ffff88007c9ebd08 ffffffff81796b73 ffff88007c9ebd48 ffffffff8103d66b 000000007b773e20 ffff8800779f0000 ffff8800779f43f0 ffff8800779f8418 000000000000015c 0000000000000062 ffff88007c9ebd58 Call Trace: [<ffffffff81796b73>] dump_stack+0x19/0x1e [<ffffffff8103d66b>] warn_slowpath_common+0x6b/0xa0 [<ffffffff8103d6b5>] warn_slowpath_null+0x15/0x20 [<ffffffffa0197627>] handle_tx+0x477/0x4b0 [vhost_net] [<ffffffffa0197690>] handle_tx_kick+0x10/0x20 [vhost_net] [<ffffffffa019541e>] vhost_worker+0xfe/0x1a0...

...wext 3dnow up ts bogomips : 9928.70 ? Also I am receiving a kernel-bug message When I try to create a domU BUG: warning at kernel/lockdep.c:1814/trace_hardirqs_on() (Not tainted) [<c040566e>] show_trace_log_lvl+0x58/0x177 [<c0405c73>] show_trace+0xd/0x10 [<c0405cb1>] dump_stack+0x19/0x1b [<c043646e>] trace_hardirqs_on+0xa4/0x120 [<c0404e67>] restore_all+0x37/0x3a DWARF2 unwinder stuck at restore_all+0x37/0x3a Leftover inexact backtrace: Inexact backtrace: [<c0405c73>] show_trace+0xd/0x10 [<c0405cb1>] dump_stack+0x19/0x1b [<c043646e>] tra...

...wext 3dnow up ts bogomips : 9928.70 ? Also I am receiving a kernel-bug message When I try to create a domU BUG: warning at kernel/lockdep.c:1814/trace_hardirqs_on() (Not tainted) [<c040566e>] show_trace_log_lvl+0x58/0x177 [<c0405c73>] show_trace+0xd/0x10 [<c0405cb1>] dump_stack+0x19/0x1b [<c043646e>] trace_hardirqs_on+0xa4/0x120 [<c0404e67>] restore_all+0x37/0x3a DWARF2 unwinder stuck at restore_all+0x37/0x3a Leftover inexact backtrace: Inexact backtrace: [<c0405c73>] show_trace+0xd/0x10 [<c0405cb1>] dump_stack+0x19/0x1b [<c043646e>] tra...

...(mmu_notifier_invalidate_range_start){+.+.}, at: __oom_reap_task_mm+0x196/0x490 mm/oom_kill.c:542 stack backtrace: CPU: 1 PID: 1065 Comm: oom_reaper Not tainted 5.3.0-rc6-next-20190830 #75 Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011 Call Trace: __dump_stack lib/dump_stack.c:77 [inline] dump_stack+0x172/0x1f0 lib/dump_stack.c:113 print_deadlock_bug kernel/locking/lockdep.c:2371 [inline] check_deadlock kernel/locking/lockdep.c:2412 [inline] validate_chain kernel/locking/lockdep.c:2955 [inline] __lock_acquire.cold+0x15d/0x385 kernel/locking/loc...

...ng/spinlock_debug.c:112 > Read of size 4 at addr ffff880194d0ec6c by task syz-executor4/28583 > > CPU: 1 PID: 28583 Comm: syz-executor4 Not tainted 4.18.0-rc7+ #169 > Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS > Google 01/01/2011 > Call Trace: > __dump_stack lib/dump_stack.c:77 [inline] > dump_stack+0x1c9/0x2b4 lib/dump_stack.c:113 > print_address_description+0x6c/0x20b mm/kasan/report.c:256 > kasan_report_error mm/kasan/report.c:354 [inline] > kasan_report.cold.7+0x242/0x2fe mm/kasan/report.c:412 > __asan_report_load4_noabort+0x14/...

...s_map_mutex){+.+.}, at: > __netif_set_xps_queue+0x243/0x23f0 net/core/dev.c:2278 > > stack backtrace: > CPU: 1 PID: 1 Comm: swapper/0 Not tainted 4.18.0-rc6+ #141 > Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS > Google 01/01/2011 > Call Trace: > __dump_stack lib/dump_stack.c:77 [inline] > dump_stack+0x1c9/0x2b4 lib/dump_stack.c:113 > print_deadlock_bug kernel/locking/lockdep.c:1765 [inline] > check_deadlock kernel/locking/lockdep.c:1809 [inline] > validate_chain kernel/locking/lockdep.c:2405 [inline] > __lock_acquire.cold.65+0x1fb/0...

...s_map_mutex){+.+.}, at: > __netif_set_xps_queue+0x243/0x23f0 net/core/dev.c:2278 > > stack backtrace: > CPU: 1 PID: 1 Comm: swapper/0 Not tainted 4.18.0-rc6+ #141 > Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS > Google 01/01/2011 > Call Trace: > __dump_stack lib/dump_stack.c:77 [inline] > dump_stack+0x1c9/0x2b4 lib/dump_stack.c:113 > print_deadlock_bug kernel/locking/lockdep.c:1765 [inline] > check_deadlock kernel/locking/lockdep.c:1809 [inline] > validate_chain kernel/locking/lockdep.c:2405 [inline] > __lock_acquire.cold.65+0x1fb/0...

...x1c/0xe8 [ 162.414630] [ 162.414630] stack backtrace: [ 162.415492] CPU: 0 PID: 0 Comm: swapper/0 Not tainted 4.16.0-rc2 #1 [ 162.429624] Hardware name: linux,dummy-virt (DT) [ 162.430631] Call trace: [ 162.431196] dump_backtrace+0x0/0x1c8 [ 162.432005] show_stack+0x14/0x20 [ 162.432747] dump_stack+0xac/0xe4 [ 162.433507] print_usage_bug.part.28+0x258/0x270 [ 162.434510] mark_lock+0x744/0x750 [ 162.435208] __lock_acquire+0xab8/0x18c0 [ 162.435982] lock_acquire+0x48/0x68 [ 162.436678] _raw_read_lock+0x3c/0x50 [ 162.449520] jbd2_trans_will_send_data_barrier+0x44/0xc8 [ 162.450681]...

...x1c/0xe8 [ 162.414630] [ 162.414630] stack backtrace: [ 162.415492] CPU: 0 PID: 0 Comm: swapper/0 Not tainted 4.16.0-rc2 #1 [ 162.429624] Hardware name: linux,dummy-virt (DT) [ 162.430631] Call trace: [ 162.431196] dump_backtrace+0x0/0x1c8 [ 162.432005] show_stack+0x14/0x20 [ 162.432747] dump_stack+0xac/0xe4 [ 162.433507] print_usage_bug.part.28+0x258/0x270 [ 162.434510] mark_lock+0x744/0x750 [ 162.435208] __lock_acquire+0xab8/0x18c0 [ 162.435982] lock_acquire+0x48/0x68 [ 162.436678] _raw_read_lock+0x3c/0x50 [ 162.449520] jbd2_trans_will_send_data_barrier+0x44/0xc8 [ 162.450681]...

...ctly, requiring interrupts to be enabled. Currently a WARNING is triggered due to the spin locking around free_buf, with a call stack like this: WARNING: CPU: 3 PID: 121 at ./include/linux/dma-mapping.h:433 free_buf+0x1a8/0x288 Call Trace: [<8040c538>] show_stack+0x74/0xc0 [<80757240>] dump_stack+0xd0/0x110 [<80430d98>] __warn+0xfc/0x130 [<80430ee0>] warn_slowpath_null+0x2c/0x3c [<807e7c6c>] free_buf+0x1a8/0x288 [<807ea590>] remove_port_data+0x50/0xac [<807ea6a0>] unplug_port+0xb4/0x1bc [<807ea858>] virtcons_remove+0xb0/0xfc [<807b6734>] virtio_dev_...

...ctly, requiring interrupts to be enabled. Currently a WARNING is triggered due to the spin locking around free_buf, with a call stack like this: WARNING: CPU: 3 PID: 121 at ./include/linux/dma-mapping.h:433 free_buf+0x1a8/0x288 Call Trace: [<8040c538>] show_stack+0x74/0xc0 [<80757240>] dump_stack+0xd0/0x110 [<80430d98>] __warn+0xfc/0x130 [<80430ee0>] warn_slowpath_null+0x2c/0x3c [<807e7c6c>] free_buf+0x1a8/0x288 [<807ea590>] remove_port_data+0x50/0xac [<807ea6a0>] unplug_port+0xb4/0x1bc [<807ea858>] virtcons_remove+0xb0/0xfc [<807b6734>] virtio_dev_...

...] swiotlb: coherent allocation failed for device 0000:01:00.0 size=2097152 [ +0.000004] CPU: 6 PID: 1023 Comm: Xorg Not tainted 4.15.0-rc8 #1 [ +0.000003] Hardware name: Micro-Star International Co., Ltd. GX780/GT780/MS-1761, BIOS E1761IMS V3.01 05/02/2011 [ +0.000003] Call Trace: [ +0.000009] dump_stack+0x9f/0xe1 [ +0.000008] swiotlb_alloc_coherent+0xdf/0x150 [ +0.000010] ttm_dma_pool_get_pages+0x1ec/0x4b0 [ +0.000015] ttm_dma_populate+0x24c/0x340 [ +0.000011] ttm_tt_bind+0x23/0x50 [ +0.000006] ttm_bo_handle_move_mem+0x58c/0x5c0 [ +0.000015] ttm_bo_validate+0x152/0x190 [ +0.000004] ?...