Periodic Null pointer access with 4.14.29-30 (while using minidlna) in sendfile system call

From: Eric Valette
Date: Sun Mar 25 2018 - 17:08:10 EST

Since a few kernels I get this error when streaming video to TV via minidlna:

Please CC me, I'm not subscribed

BUG: unable to handle kernel NULL pointer dereference at 0000000000000078
[ 3330.960519] IP: tcp_push+0x70/0xeb
[ 3330.960520] PGD 0 P4D 0
[ 3330.960523] Oops: 0000 [#1] SMP PTI
[ 3330.960532] Modules linked in: uas usb_storage ehci_pci ehci_hcd xhci_pci xhci_hcd usbcore usb_common [last unloaded: usb_storage]
[ 3330.960546] CPU: 1 PID: 4587 Comm: minidlnad Not tainted 4.14.30 #1
[ 3330.960549] Hardware name: MotherBoard By ZOTAC MotherBoard H67ITX-C-E/H67ITX-C-E, BIOS 4.6.4.B 08/25/2011
[ 3330.960553] task: ffff88023ea64440 task.stack: ffffc900013d4000
[ 3330.960558] RIP: 0010:tcp_push+0x70/0xeb
[ 3330.960560] RSP: 0018:ffffc900013d7bc0 EFLAGS: 00010246
[ 3330.960563] RAX: 0000000000000000 RBX: 00000000000005a8 RCX: 0000000000000000
[ 3330.960567] RDX: 0000000000000000 RSI: 0000000000028000 RDI: ffff880232b53080
[ 3330.960570] RBP: ffff880232b531b8 R08: 00000000000005a8 R09: 0000000000008218
[ 3330.960574] R10: ffff880232b531b8 R11: 0000000000008000 R12: ffff880227665700
[ 3330.960577] R13: ffff880232b53080 R14: 00000000000005a8 R15: 00000000ffffffe0
[ 3330.960581] FS: 00007f96f5e7ce80(0000) GS:ffff88023fa80000(0000) knlGS:0000000000000000
[ 3330.960585] CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033
[ 3330.960588] CR2: 0000000000000078 CR3: 0000000223fd2005 CR4: 00000000000606e0
[ 3330.960591] Call Trace:
[ 3330.960598] tcp_sendmsg_locked+0xac3/0xc1b
[ 3330.960606] ? generic_pipe_buf_nosteal+0x6/0x6
[ 3330.960612] sock_no_sendpage_locked+0x74/0x7b
[ 3330.960617] tcp_sendpage_locked+0x36/0x72
[ 3330.960622] ? release_sock+0x3b/0x74
[ 3330.960626] ? lock_sock_nested+0xd/0x38
[ 3330.960630] tcp_sendpage+0x38/0x4f
[ 3330.960636] inet_sendpage+0x74/0xd3
[ 3330.960640] kernel_sendpage+0x15/0x1c
[ 3330.960643] sock_sendpage+0x1b/0x1e
[ 3330.960648] pipe_to_sendpage+0x57/0x59
[ 3330.960652] __splice_from_pipe+0xa4/0x150
[ 3330.960655] splice_from_pipe+0x50/0x66
[ 3330.960660] ? generic_pipe_buf_nosteal+0x6/0x6
[ 3330.960664] direct_splice_actor+0x2e/0x2f
[ 3330.960669] splice_direct_to_actor+0xf2/0x18b
[ 3330.960673] ? vmsplice_to_user+0x10f/0x10f
[ 3330.960677] do_splice_direct+0x87/0x9b
[ 3330.960684] do_sendfile+0x186/0x2d6
[ 3330.960688] SyS_sendfile64+0x50/0x7f
[ 3330.960693] do_syscall_64+0x5c/0xe7
[ 3330.960699] entry_SYSCALL_64_after_hwframe+0x3d/0xa2
[ 3330.960704] RIP: 0033:0x7f96f3c30bea
[ 3330.960707] RSP: 002b:00007fff5ca2d008 EFLAGS: 00000206 ORIG_RAX: 0000000000000028
[ 3330.960711] RAX: ffffffffffffffda RBX: 0000000000000000 RCX: 00007f96f3c30bea
[ 3330.960715] RDX: 00007fff5ca2d018 RSI: 000000000000000b RDI: 000000000000000a
[ 3330.960718] RBP: 0000000076f378a2 R08: 0000000000000000 R09: 00005633e3b45fe7
[ 3330.960722] R10: 0000000076f378a3 R11: 0000000000000206 R12: 000000000000000b
[ 3330.960725] R13: 0000000000000001 R14: 00005633e3ddefa0 R15: 0000000000000000
[ 3330.960729] Code: 44 03 8f 44 06 00 00 79 10 80 48 38 08 8b 8f 3c 06 00 00 89 8f 44 06 00 00 40 80 e6 01 74 0c 8b 8f 3c 06 00 00 89 8f cc 05 00 00 <44> 39 40 78 72 13 89 de 45 85 db b8 02 00 00 00 5b 0f 45 d0 e9
[ 3330.960774] RIP: tcp_push+0x70/0xeb RSP: ffffc900013d7bc0
[ 3330.960777] CR2: 0000000000000078
[ 3330.960780] ---[ end trace 4fc2992bf2697a5f ]---
[ 3332.872978] BUG: unable to handle kernel NULL pointer dereference at 0000000000000078
[ 3332.872996] IP: tcp_push+0x70/0xeb
[ 3332.872998] PGD 0 P4D 0
[ 3332.873003] Oops: 0000 [#2] SMP PTI
[ 3332.873007] Modules linked in: uas usb_storage ehci_pci ehci_hcd xhci_pci xhci_hcd usbcore usb_common [last unloaded: usb_storage]
[ 3332.873022] CPU: 0 PID: 4589 Comm: minidlnad Tainted: G D 4.14.30 #1
[ 3332.873026] Hardware name: MotherBoard By ZOTAC MotherBoard H67ITX-C-E/H67ITX-C-E, BIOS 4.6.4.B 08/25/2011
[ 3332.873030] task: ffff88022afd4e40 task.stack: ffffc90001484000
[ 3332.873035] RIP: 0010:tcp_push+0x70/0xeb
[ 3332.873038] RSP: 0018:ffffc90001487bc0 EFLAGS: 00010246
[ 3332.873042] RAX: 0000000000000000 RBX: 00000000000005a8 RCX: 0000000000000000
[ 3332.873045] RDX: 0000000000000000 RSI: 0000000000028000 RDI: ffff880223ed7040
[ 3332.873049] RBP: ffff880223ed7178 R08: 00000000000005a8 R09: 0000000000014218
[ 3332.873052] R10: ffff880223ed7178 R11: 0000000000008000 R12: ffff88021fde1c40
[ 3332.873056] R13: ffff880223ed7040 R14: 00000000000005a8 R15: 00000000ffffffe0
[ 3332.873060] FS: 00007f96f5e7ce80(0000) GS:ffff88023fa00000(0000) knlGS:0000000000000000
[ 3332.873064] CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033
[ 3332.873067] CR2: 0000000000000078 CR3: 0000000223fd2006 CR4: 00000000000606f0
[ 3332.873070] Call Trace:
[ 3332.873077] tcp_sendmsg_locked+0xac3/0xc1b
[ 3332.873084] ? generic_pipe_buf_nosteal+0x6/0x6
[ 3332.873090] sock_no_sendpage_locked+0x74/0x7b
[ 3332.873095] tcp_sendpage_locked+0x36/0x72
[ 3332.873100] ? release_sock+0x3b/0x74
[ 3332.873104] ? lock_sock_nested+0xd/0x38
[ 3332.873108] tcp_sendpage+0x38/0x4f
[ 3332.873114] inet_sendpage+0x74/0xd3
[ 3332.873118] kernel_sendpage+0x15/0x1c
[ 3332.873122] sock_sendpage+0x1b/0x1e
[ 3332.873126] pipe_to_sendpage+0x57/0x59
[ 3332.873130] __splice_from_pipe+0xa4/0x150
[ 3332.873134] splice_from_pipe+0x50/0x66
[ 3332.873138] ? generic_pipe_buf_nosteal+0x6/0x6
[ 3332.873142] direct_splice_actor+0x2e/0x2f
[ 3332.873147] splice_direct_to_actor+0xf2/0x18b
[ 3332.873151] ? vmsplice_to_user+0x10f/0x10f
[ 3332.873156] do_splice_direct+0x87/0x9b
[ 3332.873162] do_sendfile+0x186/0x2d6
[ 3332.873166] SyS_sendfile64+0x50/0x7f
[ 3332.873171] do_syscall_64+0x5c/0xe7
[ 3332.873177] entry_SYSCALL_64_after_hwframe+0x3d/0xa2
[ 3332.873181] RIP: 0033:0x7f96f3c30bea
[ 3332.873184] RSP: 002b:00007fff5ca2d008 EFLAGS: 00000206 ORIG_RAX: 0000000000000028
[ 3332.873189] RAX: ffffffffffffffda RBX: 0000000000000000 RCX: 00007f96f3c30bea
[ 3332.873192] RDX: 00007fff5ca2d018 RSI: 000000000000000b RDI: 000000000000000a
[ 3332.873195] RBP: 0000000076f378a2 R08: 0000000000000000 R09: 00005633e3b45fe7
[ 3332.873199] R10: 0000000076f35777 R11: 0000000000000206 R12: 000000000000000b
[ 3332.873202] R13: 0000000000000001 R14: 00005633e3ddefa0 R15: 000000000000212c
[ 3332.873206] Code: 44 03 8f 44 06 00 00 79 10 80 48 38 08 8b 8f 3c 06 00 00 89 8f 44 06 00 00 40 80 e6 01 74 0c 8b 8f 3c 06 00 00 89 8f cc 05 00 00 <44> 39 40 78 72 13 89 de 45 85 db b8 02 00 00 00 5b 0f 45 d0 e9
[ 3332.873252] RIP: tcp_push+0x70/0xeb RSP: ffffc90001487bc0
[ 3332.873254] CR2: 0000000000000078
[ 3332.873268] ---[ end trace 4fc2992bf2697a60 ]---
[ 3466.216198] BUG: unable to handle kernel NULL pointer dereference at 0000000000000078
[ 3466.216214] IP: tcp_push+0x70/0xeb
[ 3466.216216] PGD 0 P4D 0
[ 3466.216221] Oops: 0000 [#3] SMP PTI
[ 3466.216224] Modules linked in: uas usb_storage ehci_pci ehci_hcd xhci_pci xhci_hcd usbcore usb_common [last unloaded: usb_storage]
[ 3466.216239] CPU: 0 PID: 4590 Comm: minidlnad Tainted: G D 4.14.30 #1
[ 3466.216242] Hardware name: MotherBoard By ZOTAC MotherBoard H67ITX-C-E/H67ITX-C-E, BIOS 4.6.4.B 08/25/2011
[ 3466.216247] task: ffff880227582f40 task.stack: ffffc9000148c000
[ 3466.216252] RIP: 0010:tcp_push+0x70/0xeb
[ 3466.216255] RSP: 0018:ffffc9000148fbc0 EFLAGS: 00010246
[ 3466.216259] RAX: 0000000000000000 RBX: 00000000000005a8 RCX: 0000000000000000
[ 3466.216263] RDX: 0000000000000000 RSI: 0000000000028000 RDI: ffff88023320f780
[ 3466.216266] RBP: ffff88023320f8b8 R08: 00000000000005a8 R09: 0000000000020000
[ 3466.216269] R10: ffff88023320f8b8 R11: 0000000000008000 R12: ffff88021c45e700
[ 3466.216273] R13: ffff88023320f780 R14: 000000000000054d R15: 00000000ffffffe0
[ 3466.216277] FS: 00007f96f5e7ce80(0000) GS:ffff88023fa00000(0000) knlGS:0000000000000000
[ 3466.216281] CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033
[ 3466.216284] CR2: 0000000000000078 CR3: 000000022f308002 CR4: 00000000000606f0
[ 3466.216287] Call Trace:
[ 3466.216293] tcp_sendmsg_locked+0xac3/0xc1b
[ 3466.216301] ? generic_pipe_buf_nosteal+0x6/0x6
[ 3466.216306] sock_no_sendpage_locked+0x74/0x7b
[ 3466.216311] tcp_sendpage_locked+0x36/0x72
[ 3466.216316] ? release_sock+0x3b/0x74
[ 3466.216320] ? lock_sock_nested+0xd/0x38
[ 3466.216324] tcp_sendpage+0x38/0x4f
[ 3466.216330] inet_sendpage+0x74/0xd3
[ 3466.216334] kernel_sendpage+0x15/0x1c
[ 3466.216337] sock_sendpage+0x1b/0x1e
[ 3466.216342] pipe_to_sendpage+0x57/0x59
[ 3466.216345] __splice_from_pipe+0xa4/0x150
[ 3466.216349] splice_from_pipe+0x50/0x66
[ 3466.216354] ? generic_pipe_buf_nosteal+0x6/0x6
[ 3466.216358] direct_splice_actor+0x2e/0x2f
[ 3466.216362] splice_direct_to_actor+0xf2/0x18b
[ 3466.216366] ? vmsplice_to_user+0x10f/0x10f
[ 3466.216371] do_splice_direct+0x87/0x9b
[ 3466.216377] do_sendfile+0x186/0x2d6
[ 3466.216381] SyS_sendfile64+0x50/0x7f
[ 3466.216385] do_syscall_64+0x5c/0xe7
[ 3466.216391] entry_SYSCALL_64_after_hwframe+0x3d/0xa2
[ 3466.216396] RIP: 0033:0x7f96f3c30bea
[ 3466.216398] RSP: 002b:00007fff5ca2d008 EFLAGS: 00000206 ORIG_RAX: 0000000000000028
[ 3466.216403] RAX: ffffffffffffffda RBX: 0000000000000000 RCX: 00007f96f3c30bea
[ 3466.216407] RDX: 00007fff5ca2d018 RSI: 000000000000000b RDI: 000000000000000a
[ 3466.216410] RBP: 0000000076f378a2 R08: 0000000000000000 R09: 00005633e3b45fe7
[ 3466.216413] R10: 0000000076f3577b R11: 0000000000000206 R12: 000000000000000b
[ 3466.216417] R13: 0000000000000001 R14: 00005633e3ddefa0 R15: 0000000000002128
[ 3466.216420] Code: 44 03 8f 44 06 00 00 79 10 80 48 38 08 8b 8f 3c 06 00 00 89 8f 44 06 00 00 40 80 e6 01 74 0c 8b 8f 3c 06 00 00 89 8f cc 05 00 00 <44> 39 40 78 72 13 89 de 45 85 db b8 02 00 00 00 5b 0f 45 d0 e9
[ 3466.216466] RIP: tcp_push+0x70/0xeb RSP: ffffc9000148fbc0
[ 3466.216468] CR2: 0000000000000078
[ 3466.216471] ---[ end trace 4fc2992bf2697a61 ]---
[ 3466.285840] BUG: unable to handle kernel NULL pointer dereference at 0000000000000078
[ 3466.285857] IP: tcp_push+0x70/0xeb
[ 3466.285859] PGD 0 P4D 0
[ 3466.285872] Oops: 0000 [#4] SMP PTI
[ 3466.285874] Modules linked in: uas usb_storage ehci_pci ehci_hcd xhci_pci xhci_hcd usbcore usb_common [last unloaded: usb_storage]
[ 3466.285882] CPU: 0 PID: 4782 Comm: minidlnad Tainted: G D 4.14.30 #1
[ 3466.285884] Hardware name: MotherBoard By ZOTAC MotherBoard H67ITX-C-E/H67ITX-C-E, BIOS 4.6.4.B 08/25/2011
[ 3466.285886] task: ffff88022aba4580 task.stack: ffffc90001720000
[ 3466.285889] RIP: 0010:tcp_push+0x70/0xeb
[ 3466.285890] RSP: 0018:ffffc90001723bc0 EFLAGS: 00010246
[ 3466.285892] RAX: 0000000000000000 RBX: 00000000000005a8 RCX: 0000000000000000
[ 3466.285894] RDX: 0000000000000000 RSI: 0000000000008000 RDI: ffff88023320f000
[ 3466.285896] RBP: ffff88023320f138 R08: 00000000000005a8 R09: 0000000000008218
[ 3466.285897] R10: ffff88023320f138 R11: 0000000000008000 R12: ffff88021fd14e00
[ 3466.285899] R13: ffff88023320f000 R14: 00000000000005a8 R15: 00000000ffffffe0
[ 3466.285901] FS: 00007f96f5e7ce80(0000) GS:ffff88023fa00000(0000) knlGS:0000000000000000
[ 3466.285903] CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033
[ 3466.285905] CR2: 0000000000000078 CR3: 000000022f308005 CR4: 00000000000606f0
[ 3466.285906] Call Trace:
[ 3466.285910] tcp_sendmsg_locked+0xac3/0xc1b
[ 3466.285914] ? generic_pipe_buf_nosteal+0x6/0x6
[ 3466.285917] sock_no_sendpage_locked+0x74/0x7b
[ 3466.285920] tcp_sendpage_locked+0x36/0x72
[ 3466.285922] ? release_sock+0x3b/0x74
[ 3466.285924] ? lock_sock_nested+0xd/0x38
[ 3466.285926] tcp_sendpage+0x38/0x4f
[ 3466.285930] inet_sendpage+0x74/0xd3
[ 3466.285932] kernel_sendpage+0x15/0x1c
[ 3466.285934] sock_sendpage+0x1b/0x1e
[ 3466.285936] pipe_to_sendpage+0x57/0x59
[ 3466.285938] __splice_from_pipe+0xa4/0x150
[ 3466.285940] splice_from_pipe+0x50/0x66
[ 3466.285942] ? generic_pipe_buf_nosteal+0x6/0x6
[ 3466.285944] direct_splice_actor+0x2e/0x2f
[ 3466.285947] splice_direct_to_actor+0xf2/0x18b
[ 3466.285949] ? vmsplice_to_user+0x10f/0x10f
[ 3466.285951] do_splice_direct+0x87/0x9b
[ 3466.285954] do_sendfile+0x186/0x2d6
[ 3466.285956] SyS_sendfile64+0x50/0x7f
[ 3466.285959] do_syscall_64+0x5c/0xe7
[ 3466.285963] entry_SYSCALL_64_after_hwframe+0x3d/0xa2
[ 3466.285965] RIP: 0033:0x7f96f3c30bea
[ 3466.285966] RSP: 002b:00007fff5ca2d008 EFLAGS: 00000206 ORIG_RAX: 0000000000000028
[ 3466.285969] RAX: ffffffffffffffda RBX: 0000000000000000 RCX: 00007f96f3c30bea
[ 3466.285971] RDX: 00007fff5ca2d018 RSI: 000000000000000b RDI: 000000000000000a
[ 3466.285972] RBP: 00000000af0c410c R08: 0000000000000000 R09: 00005633e3b45fe7
[ 3466.285974] R10: 000000007fffffff R11: 0000000000000206 R12: 000000000000000b
[ 3466.285976] R13: 0000000000000001 R14: 00005633e3ddefa0 R15: 0000000000000000
[ 3466.285978] Code: 44 03 8f 44 06 00 00 79 10 80 48 38 08 8b 8f 3c 06 00 00 89 8f 44 06 00 00 40 80 e6 01 74 0c 8b 8f 3c 06 00 00 89 8f cc 05 00 00 <44> 39 40 78 72 13 89 de 45 85 db b8 02 00 00 00 5b 0f 45 d0 e9
[ 3466.286001] RIP: tcp_push+0x70/0xeb RSP: ffffc90001723bc0
[ 3466.286002] CR2: 0000000000000078
[ 3466.286017] ---[ end trace 4fc2992bf2697a62 ]---
[ 3467.935612] BUG: unable to handle kernel NULL pointer dereference at 0000000000000078
[ 3467.935628] IP: tcp_push+0x70/0xeb
[ 3467.935631] PGD 0 P4D 0
[ 3467.935636] Oops: 0000 [#5] SMP PTI
[ 3467.935639] Modules linked in: uas usb_storage ehci_pci ehci_hcd xhci_pci xhci_hcd usbcore usb_common [last unloaded: usb_storage]
[ 3467.935654] CPU: 0 PID: 4784 Comm: minidlnad Tainted: G D 4.14.30 #1
[ 3467.935658] Hardware name: MotherBoard By ZOTAC MotherBoard H67ITX-C-E/H67ITX-C-E, BIOS 4.6.4.B 08/25/2011
[ 3467.935662] task: ffff88023ea02400 task.stack: ffffc900015b4000
[ 3467.935667] RIP: 0010:tcp_push+0x70/0xeb
[ 3467.935670] RSP: 0018:ffffc900015b7bc0 EFLAGS: 00010246
[ 3467.935674] RAX: 0000000000000000 RBX: 00000000000005a8 RCX: 0000000000000000
[ 3467.935678] RDX: 0000000000000000 RSI: 0000000000028000 RDI: ffff880236f0e780
[ 3467.935681] RBP: ffff880236f0e8b8 R08: 00000000000005a8 R09: 0000000000012218
[ 3467.935685] R10: ffff880236f0e8b8 R11: 0000000000008000 R12: ffff88021ffaa1c0
[ 3467.935688] R13: ffff880236f0e780 R14: 0000000000000206 R15: 00000000ffffffe0
[ 3467.935692] FS: 00007f96f5e7ce80(0000) GS:ffff88023fa00000(0000) knlGS:0000000000000000
[ 3467.935696] CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033
[ 3467.935699] CR2: 0000000000000078 CR3: 0000000223f10002 CR4: 00000000000606f0
[ 3467.935702] Call Trace:
[ 3467.935709] tcp_sendmsg_locked+0xac3/0xc1b
[ 3467.935716] ? generic_pipe_buf_nosteal+0x6/0x6
[ 3467.935721] sock_no_sendpage_locked+0x74/0x7b
[ 3467.935727] tcp_sendpage_locked+0x36/0x72
[ 3467.935732] ? release_sock+0x3b/0x74
[ 3467.935736] ? lock_sock_nested+0xd/0x38
[ 3467.935740] tcp_sendpage+0x38/0x4f
[ 3467.935745] inet_sendpage+0x74/0xd3
[ 3467.935750] kernel_sendpage+0x15/0x1c
[ 3467.935753] sock_sendpage+0x1b/0x1e
[ 3467.935758] pipe_to_sendpage+0x57/0x59
[ 3467.935762] __splice_from_pipe+0xa4/0x150
[ 3467.935765] splice_from_pipe+0x50/0x66
[ 3467.935770] ? generic_pipe_buf_nosteal+0x6/0x6
[ 3467.935774] direct_splice_actor+0x2e/0x2f
[ 3467.935779] splice_direct_to_actor+0xf2/0x18b
[ 3467.935782] ? vmsplice_to_user+0x10f/0x10f
[ 3467.935787] do_splice_direct+0x87/0x9b
[ 3467.935793] do_sendfile+0x186/0x2d6
[ 3467.935797] SyS_sendfile64+0x50/0x7f
[ 3467.935802] do_syscall_64+0x5c/0xe7
[ 3467.935808] entry_SYSCALL_64_after_hwframe+0x3d/0xa2
[ 3467.935812] RIP: 0033:0x7f96f3c30bea
[ 3467.935815] RSP: 002b:00007fff5ca2d008 EFLAGS: 00000206 ORIG_RAX: 0000000000000028
[ 3467.935819] RAX: ffffffffffffffda RBX: 0000000000000000 RCX: 00007f96f3c30bea
[ 3467.935823] RDX: 00007fff5ca2d018 RSI: 000000000000000b RDI: 000000000000000a
[ 3467.935826] RBP: 00000000af0c410c R08: 0000000000000000 R09: 00005633e3b45fe7
[ 3467.935830] R10: 000000007fffffff R11: 0000000000000206 R12: 000000000000000b
[ 3467.935833] R13: 0000000000000001 R14: 00005633e3ddefa0 R15: 0000000000001b31
[ 3467.935837] Code: 44 03 8f 44 06 00 00 79 10 80 48 38 08 8b 8f 3c 06 00 00 89 8f 44 06 00 00 40 80 e6 01 74 0c 8b 8f 3c 06 00 00 89 8f cc 05 00 00 <44> 39 40 78 72 13 89 de 45 85 db b8 02 00 00 00 5b 0f 45 d0 e9
[ 3467.935882] RIP: tcp_push+0x70/0xeb RSP: ffffc900015b7bc0
[ 3467.935885] CR2: 0000000000000078
[ 3467.935909] ---[ end trace 4fc2992bf2697a63 ]---
[ 9308.859580] BUG: unable to handle kernel NULL pointer dereference at 0000000000000078
[ 9308.859596] IP: tcp_push+0x70/0xeb
[ 9308.859598] PGD 0 P4D 0
[ 9308.859603] Oops: 0000 [#6] SMP PTI
[ 9308.859606] Modules linked in: uas usb_storage ehci_pci ehci_hcd xhci_pci xhci_hcd usbcore usb_common [last unloaded: usb_storage]
[ 9308.859621] CPU: 0 PID: 4785 Comm: minidlnad Tainted: G D 4.14.30 #1
[ 9308.859624] Hardware name: MotherBoard By ZOTAC MotherBoard H67ITX-C-E/H67ITX-C-E, BIOS 4.6.4.B 08/25/2011
[ 9308.859629] task: ffff88022f1d6280 task.stack: ffffc900016b0000
[ 9308.859634] RIP: 0010:tcp_push+0x70/0xeb
[ 9308.859637] RSP: 0018:ffffc900016b3bc0 EFLAGS: 00010246
[ 9308.859640] RAX: 0000000000000000 RBX: 00000000000005a8 RCX: 0000000000000000
[ 9308.859644] RDX: 0000000000000000 RSI: 0000000000028000 RDI: ffff880236f0e000
[ 9308.859647] RBP: ffff880236f0e138 R08: 00000000000005a8 R09: 0000000000020000
[ 9308.859651] R10: ffff880236f0e138 R11: 0000000000008000 R12: ffff88023662ba80
[ 9308.859654] R13: ffff880236f0e000 R14: 00000000000005a8 R15: 00000000ffffffe0
[ 9308.859659] FS: 00007f96f5e7ce80(0000) GS:ffff88023fa00000(0000) knlGS:0000000000000000
[ 9308.859662] CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033
[ 9308.859666] CR2: 0000000000000078 CR3: 000000022f308005 CR4: 00000000000606f0
[ 9308.859669] Call Trace:
[ 9308.859675] tcp_sendmsg_locked+0xac3/0xc1b
[ 9308.859682] ? generic_pipe_buf_nosteal+0x6/0x6
[ 9308.859687] sock_no_sendpage_locked+0x74/0x7b
[ 9308.859692] tcp_sendpage_locked+0x36/0x72
[ 9308.859697] ? release_sock+0x3b/0x74
[ 9308.859701] ? lock_sock_nested+0xd/0x38
[ 9308.859705] tcp_sendpage+0x38/0x4f
[ 9308.859711] inet_sendpage+0x74/0xd3
[ 9308.859715] kernel_sendpage+0x15/0x1c
[ 9308.859719] sock_sendpage+0x1b/0x1e
[ 9308.859723] pipe_to_sendpage+0x57/0x59
[ 9308.859727] __splice_from_pipe+0xa4/0x150
[ 9308.859730] splice_from_pipe+0x50/0x66
[ 9308.859735] ? generic_pipe_buf_nosteal+0x6/0x6
[ 9308.859739] direct_splice_actor+0x2e/0x2f
[ 9308.859743] splice_direct_to_actor+0xf2/0x18b
[ 9308.859747] ? vmsplice_to_user+0x10f/0x10f
[ 9308.859752] do_splice_direct+0x87/0x9b
[ 9308.859757] do_sendfile+0x186/0x2d6
[ 9308.859761] SyS_sendfile64+0x50/0x7f
[ 9308.859766] do_syscall_64+0x5c/0xe7
[ 9308.859771] entry_SYSCALL_64_after_hwframe+0x3d/0xa2
[ 9308.859776] RIP: 0033:0x7f96f3c30bea
[ 9308.859778] RSP: 002b:00007fff5ca2d008 EFLAGS: 00000212 ORIG_RAX: 0000000000000028
[ 9308.859783] RAX: ffffffffffffffda RBX: 0000000000000000 RCX: 00007f96f3c30bea
[ 9308.859787] RDX: 00007fff5ca2d018 RSI: 000000000000000b RDI: 000000000000000a
[ 9308.859790] RBP: 00000000af0c410c R08: 0000000000000000 R09: 00005633e3b45fe7
[ 9308.859793] R10: 000000002f0c35e0 R11: 0000000000000212 R12: 000000000000000b
[ 9308.859797] R13: 0000000000000001 R14: 00005633e3ddefa0 R15: 0000000080000b2d
[ 9308.859800] Code: 44 03 8f 44 06 00 00 79 10 80 48 38 08 8b 8f 3c 06 00 00 89 8f 44 06 00 00 40 80 e6 01 74 0c 8b 8f 3c 06 00 00 89 8f cc 05 00 00 <44> 39 40 78 72 13 89 de 45 85 db b8 02 00 00 00 5b 0f 45 d0 e9
[ 9308.859846] RIP: tcp_push+0x70/0xeb RSP: ffffc900016b3bc0
[ 9308.859848] CR2: 0000000000000078
[ 9308.859851] ---[ end trace 4fc2992bf2697a64 ]---
root@nas2:~#

--
__
/ ` Eric Valette
/-- __ o _. 6 rue Paul Le Flem
(___, / (_(_(__ 35740 Pace

Tel: +33 (0)2 99 85 26 76 Fax: +33 (0)2 99 85 26 76
E-mail: eric.valette@xxxxxxx