bisecting cause commit starting from 6207214a70bfaec7b41f39502353fd3ca89df68c
building syzkaller on b1c228e1773559f05fa98950902ab025d6ab946e
testing commit 6207214a70bfaec7b41f39502353fd3ca89df68c with gcc (GCC) 8.1.0
kernel signature: b263e4f911a5ab0feb7dd6f734d9434f1ddf7278210a48334069332d1ddfc60b
all runs: crashed: WARNING in qrtr_tun_write_iter
testing release v5.10
testing commit 2c85ebc57b3e1817b6ce1a6b703928e113a90442 with gcc (GCC) 8.1.0
kernel signature: 395a614079c9030036488f72c030c4708fae86b9aba956ca15d15003efd3a593
all runs: crashed: WARNING in qrtr_tun_write_iter
testing release v5.9
testing commit bbf5c979011a099af5dc76498918ed7df445635b with gcc (GCC) 8.1.0
kernel signature: 267e4e72ea6151d6ca484a7d3cc70be89ff7365b860f2a296ca76a677664b0bf
all runs: crashed: WARNING in qrtr_tun_write_iter
testing release v5.8
testing commit bcf876870b95592b52519ed4aafcf9d95999bc9c with gcc (GCC) 8.1.0
kernel signature: e1b748eb2406e6b7622d3ac2ddd4d5444e7de9e64fd85ab34f83bf371b1755d5
all runs: crashed: WARNING in qrtr_tun_write_iter
testing release v5.7
testing commit 3d77e6a8804abcc0504c904bd6e5cdf3a5cf8162 with gcc (GCC) 8.1.0
kernel signature: 47862bb6707373f5ffcdd61ba6af4294f0c423a6cb2ee4daa5590631048de304
all runs: OK
# git bisect start bcf876870b95592b52519ed4aafcf9d95999bc9c 3d77e6a8804abcc0504c904bd6e5cdf3a5cf8162
Bisecting: 8752 revisions left to test after this (roughly 13 steps)
[694b5a5d313f3997764b67d52bab66ec7e59e714] Merge tag 'arm-soc-5.8' of git://git.kernel.org/pub/scm/linux/kernel/git/soc/soc

testing commit 694b5a5d313f3997764b67d52bab66ec7e59e714 with gcc (GCC) 8.1.0
kernel signature: c73579a0aeb62524e05aee36558caf0004e2d85f24753e4b27c8bc44e60b08cb
all runs: crashed: WARNING in qrtr_tun_write_iter
# git bisect bad 694b5a5d313f3997764b67d52bab66ec7e59e714
Bisecting: 4417 revisions left to test after this (roughly 12 steps)
[2e63f6ce7ed2c4ff83ba30ad9ccad422289a6c63] Merge branch 'uaccess.comedi' of git://git.kernel.org/pub/scm/linux/kernel/git/viro/vfs

testing commit 2e63f6ce7ed2c4ff83ba30ad9ccad422289a6c63 with gcc (GCC) 8.1.0
kernel signature: bc1149ba1c504858fbf7c2c5825eb96b2dfb125ebf982b98de5d811d9ce3cdca
all runs: OK
# git bisect good 2e63f6ce7ed2c4ff83ba30ad9ccad422289a6c63
Bisecting: 2208 revisions left to test after this (roughly 11 steps)
[5df42c8267418bfb8da54cc4772b397ea4c88aea] ice: fix MAC write command

testing commit 5df42c8267418bfb8da54cc4772b397ea4c88aea with gcc (GCC) 8.1.0
kernel signature: dba25eac5b2440f349c1b9d3cc44c6b19e0ea3c62169917590f768981f48e3bd
all runs: crashed: WARNING in qrtr_tun_write_iter
# git bisect bad 5df42c8267418bfb8da54cc4772b397ea4c88aea
Bisecting: 1095 revisions left to test after this (roughly 10 steps)
[5d9e4722c74e8868d5fe2f8749de80928eb4a1d1] Merge tag 'wireless-drivers-next-2020-05-07' of git://git.kernel.org/pub/scm/linux/kernel/git/kvalo/wireless-drivers-next

testing commit 5d9e4722c74e8868d5fe2f8749de80928eb4a1d1 with gcc (GCC) 8.1.0
kernel signature: 90aed81120b4a8adee5765dae94a824c1feb967c7201c78068075c521b9bbe1f
all runs: boot failed: kernel panic: VFS: Unable to mount root fs on unknown-block(8,1)
# git bisect skip 5d9e4722c74e8868d5fe2f8749de80928eb4a1d1
Bisecting: 1095 revisions left to test after this (roughly 10 steps)
[b410439ca371334cd9e5772e411b5e2b6b2d0c9a] r8169: improve max jumbo packet size definition

testing commit b410439ca371334cd9e5772e411b5e2b6b2d0c9a with gcc (GCC) 8.1.0
kernel signature: 0c74b3beb35df5add472663238598a9a54ae1bfd4d1a89ddd4dbc647fd268f31
all runs: boot failed: kernel panic: VFS: Unable to mount root fs on unknown-block(8,1)
# git bisect skip b410439ca371334cd9e5772e411b5e2b6b2d0c9a
Bisecting: 1095 revisions left to test after this (roughly 10 steps)
[71e9378bcfd2e9dd96c2bfbef23f3562946d30b3] iwlwifi: mvm: initialize iwl_dev_tx_power_cmd to zero

testing commit 71e9378bcfd2e9dd96c2bfbef23f3562946d30b3 with gcc (GCC) 8.1.0
kernel signature: 25eebd1c17183f5054015b6dde730a50fa9eb777a77b4c3c0249225fb4c4ed97
all runs: boot failed: kernel panic: VFS: Unable to mount root fs on unknown-block(8,1)
# git bisect skip 71e9378bcfd2e9dd96c2bfbef23f3562946d30b3
Bisecting: 1095 revisions left to test after this (roughly 10 steps)
[931ca7ab7fe804d77bc6952f1512950c0d870f26] ip*_mc_gsfget(): lift copyout of struct group_filter into callers

testing commit 931ca7ab7fe804d77bc6952f1512950c0d870f26 with gcc (GCC) 8.1.0
kernel signature: f9a7112fbc197d1d4e32e9455a86c84793c0a3bfa08821d6cbf5f037a6ece192
all runs: crashed: WARNING in qrtr_tun_write_iter
# git bisect bad 931ca7ab7fe804d77bc6952f1512950c0d870f26
Bisecting: 799 revisions left to test after this (roughly 10 steps)
[367ec3e4834cbd611401c2c40a23c22c825474f1] bpf: Create file bpf iterator

testing commit 367ec3e4834cbd611401c2c40a23c22c825474f1 with gcc (GCC) 8.1.0
kernel signature: 4124e470f9244a181a04871d7e70f70e1de731f0d91052679b10414350da2c93
all runs: boot failed: kernel panic: VFS: Unable to mount root fs on unknown-block(8,1)
# git bisect skip 367ec3e4834cbd611401c2c40a23c22c825474f1
Bisecting: 799 revisions left to test after this (roughly 10 steps)
[6cd35888a0db4b18a5796fe5d5863f004f8eef0f] Merge branch 'for-upstream' of git://git.kernel.org/pub/scm/linux/kernel/git/bluetooth/bluetooth-next

testing commit 6cd35888a0db4b18a5796fe5d5863f004f8eef0f with gcc (GCC) 8.1.0
kernel signature: 8759d1f1148bede550d1b368dfe6760a4f2a0c07c20cb2d2ad08073ca26682ea
all runs: boot failed: kernel panic: VFS: Unable to mount root fs on unknown-block(8,1)
# git bisect skip 6cd35888a0db4b18a5796fe5d5863f004f8eef0f
Bisecting: 799 revisions left to test after this (roughly 10 steps)
[6e7e034e88e8e22cb14765c86da92416017e45b8] tools, bpftool: Poison and replace kernel integer typedefs

testing commit 6e7e034e88e8e22cb14765c86da92416017e45b8 with gcc (GCC) 8.1.0
kernel signature: 626286889ed242547335634e1f6221ac54bdc5c98fb4e2bb73db0e2d057f155b
all runs: boot failed: kernel panic: VFS: Unable to mount root fs on unknown-block(8,1)
# git bisect skip 6e7e034e88e8e22cb14765c86da92416017e45b8
Bisecting: 799 revisions left to test after this (roughly 10 steps)
[e7f304607778e31bfd8e6b00ce2a8f990b265e14] kselftest: run tests by fixture

testing commit e7f304607778e31bfd8e6b00ce2a8f990b265e14 with gcc (GCC) 8.1.0
kernel signature: c7b11ae3b22f5136c5ab7250ca0141dfe8e7d890999cff83f12bda5f3c4074e6
all runs: boot failed: kernel panic: VFS: Unable to mount root fs on unknown-block(8,1)
# git bisect skip e7f304607778e31bfd8e6b00ce2a8f990b265e14
Bisecting: 799 revisions left to test after this (roughly 10 steps)
[8ae2473842bdbb95bfb451b130dad6a650b3ad1b] bnxt_en: Add support for L2 doorbell size.

testing commit 8ae2473842bdbb95bfb451b130dad6a650b3ad1b with gcc (GCC) 8.1.0
kernel signature: 44deb1567d1ad82b8f3f18314630e9b839167d3ce1f6cad40b8ff1cace814e10
all runs: boot failed: kernel panic: VFS: Unable to mount root fs on unknown-block(8,1)
# git bisect skip 8ae2473842bdbb95bfb451b130dad6a650b3ad1b
Bisecting: 799 revisions left to test after this (roughly 10 steps)
[9a9891fbdf935c270388fca856c117ad71c02458] docs: networking: convert cxacru.txt to ReST

testing commit 9a9891fbdf935c270388fca856c117ad71c02458 with gcc (GCC) 8.1.0
kernel signature: c7b11ae3b22f5136c5ab7250ca0141dfe8e7d890999cff83f12bda5f3c4074e6
all runs: boot failed: kernel panic: VFS: Unable to mount root fs on unknown-block(8,1)
# git bisect skip 9a9891fbdf935c270388fca856c117ad71c02458
Bisecting: 799 revisions left to test after this (roughly 10 steps)
[bc54ac3609aa0361dfeb15758b7bacf3637f6d4a] r8169: use new helper eth_hw_addr_crc

testing commit bc54ac3609aa0361dfeb15758b7bacf3637f6d4a with gcc (GCC) 8.1.0
kernel signature: 463bb393c1214a3ad57d0be94c77d1ea4832e4c168f036fa71758c95cada6edf
all runs: boot failed: kernel panic: VFS: Unable to mount root fs on unknown-block(8,1)
# git bisect skip bc54ac3609aa0361dfeb15758b7bacf3637f6d4a
Bisecting: 799 revisions left to test after this (roughly 10 steps)
[19093313cb0486d568232934bb80dd422d891623] docs: networking: convert ipv6.txt to ReST

testing commit 19093313cb0486d568232934bb80dd422d891623 with gcc (GCC) 8.1.0
kernel signature: c7b11ae3b22f5136c5ab7250ca0141dfe8e7d890999cff83f12bda5f3c4074e6
all runs: boot failed: kernel panic: VFS: Unable to mount root fs on unknown-block(8,1)
# git bisect skip 19093313cb0486d568232934bb80dd422d891623
Bisecting: 799 revisions left to test after this (roughly 10 steps)
[b286a0651e4404ab96cdfdcdad8a839a26b3751e] net/smc: handle incoming CDC validation message

testing commit b286a0651e4404ab96cdfdcdad8a839a26b3751e with gcc (GCC) 8.1.0
kernel signature: 460b64df0512cb9ba3a52332b67e23edaad787f26005a0a8a76a9325fec01235
all runs: boot failed: kernel panic: VFS: Unable to mount root fs on unknown-block(8,1)
# git bisect skip b286a0651e4404ab96cdfdcdad8a839a26b3751e
Bisecting: 799 revisions left to test after this (roughly 10 steps)
[ac02a451a6148bb9c395b39783ce7299eddf4f31] net: dsa: sja1105: implement cross-chip bridging operations

testing commit ac02a451a6148bb9c395b39783ce7299eddf4f31 with gcc (GCC) 8.1.0
kernel signature: f233bafdcb0172831fb6d28b7fbeb00066548a7a2a847ebe1a567f3b1d5ee87f
all runs: boot failed: kernel panic: VFS: Unable to mount root fs on unknown-block(8,1)
# git bisect skip ac02a451a6148bb9c395b39783ce7299eddf4f31
Bisecting: 799 revisions left to test after this (roughly 10 steps)
[ac51d99bf81caac8d8881fe52098948110d0de68] bpf: Create anonymous bpf iterator

testing commit ac51d99bf81caac8d8881fe52098948110d0de68 with gcc (GCC) 8.1.0
kernel signature: 10d688b0a9519dd1c341e3d75a1c81265045b10ad4a275d5674aa9761954da48
all runs: boot failed: kernel panic: VFS: Unable to mount root fs on unknown-block(8,1)
# git bisect skip ac51d99bf81caac8d8881fe52098948110d0de68
Bisecting: 799 revisions left to test after this (roughly 10 steps)
[4f6cd04f2ded199931c44b3c95c4938618cd8b82] dsa: sja1105: fix semicolon.cocci warnings

testing commit 4f6cd04f2ded199931c44b3c95c4938618cd8b82 with gcc (GCC) 8.1.0
kernel signature: 8b06a06bb015a0f662123c49544b91a76f06cd9a50988d57c1b107cf3160880f
all runs: boot failed: kernel panic: VFS: Unable to mount root fs on unknown-block(8,1)
# git bisect skip 4f6cd04f2ded199931c44b3c95c4938618cd8b82
Bisecting: 799 revisions left to test after this (roughly 10 steps)
[3ee7b7cd83900bb711efadbf16fa096a615a1566] Bluetooth: Add BT_MODE socket option

testing commit 3ee7b7cd83900bb711efadbf16fa096a615a1566 with gcc (GCC) 8.1.0
kernel signature: 2703c7d5ba6f3f5e9324a459ee7428d6ee57bc09f95b68493bd44c7ed04d9fb3
all runs: boot failed: kernel panic: VFS: Unable to mount root fs on unknown-block(8,1)
# git bisect skip 3ee7b7cd83900bb711efadbf16fa096a615a1566
Bisecting: 799 revisions left to test after this (roughly 10 steps)
[ab1e0ce99d3dabc57e5a383b3ffc60fb97aafe9e] net/mlx5e: kTLS, Fill work queue edge separately in TX flow

testing commit ab1e0ce99d3dabc57e5a383b3ffc60fb97aafe9e with gcc (GCC) 8.1.0
kernel signature: 8b06a06bb015a0f662123c49544b91a76f06cd9a50988d57c1b107cf3160880f
all runs: boot failed: kernel panic: VFS: Unable to mount root fs on unknown-block(8,1)
# git bisect skip ab1e0ce99d3dabc57e5a383b3ffc60fb97aafe9e
Bisecting: 799 revisions left to test after this (roughly 10 steps)
[d2a3f5f4635b7b0df8d4cd04ee0c75886ef699b9] Bluetooth: Add HCI device identifier for VIRTIO devices

testing commit d2a3f5f4635b7b0df8d4cd04ee0c75886ef699b9 with gcc (GCC) 8.1.0
kernel signature: 291b6fa51d84c32690651386a4f3c610af159daae0af512ac97fd126204d1c56
all runs: boot failed: kernel panic: VFS: Unable to mount root fs on unknown-block(8,1)
# git bisect skip d2a3f5f4635b7b0df8d4cd04ee0c75886ef699b9
Bisecting: 799 revisions left to test after this (roughly 10 steps)
[ec9cdca0663a543ede2072ff091beec1787e3374] net/mlx5e: Unify reserving space for WQEs

testing commit ec9cdca0663a543ede2072ff091beec1787e3374 with gcc (GCC) 8.1.0
kernel signature: b2e0a4ebbb7807753ecfc5192d8ea8f22c257587e7205430c4afb2ce47ed78f6
all runs: boot failed: kernel panic: VFS: Unable to mount root fs on unknown-block(8,1)
# git bisect skip ec9cdca0663a543ede2072ff091beec1787e3374
Bisecting: 799 revisions left to test after this (roughly 10 steps)
[c6f5f242f5ed58cc531e75507e8447a8c9b6cd30] net: phy: mdio-bcm-iproc: Do not show kernel pointer

testing commit c6f5f242f5ed58cc531e75507e8447a8c9b6cd30 with gcc (GCC) 8.1.0
kernel signature: e327ffa4f17fdeb85928a4a60ba45ac64b2aaf5a4c811fde0e45b2d0cadc7e00
all runs: boot failed: kernel panic: VFS: Unable to mount root fs on unknown-block(8,1)
# git bisect skip c6f5f242f5ed58cc531e75507e8447a8c9b6cd30
Bisecting: 799 revisions left to test after this (roughly 10 steps)
[14366da6b59203ef5fc3cf21660113b60c2f1421] mlxsw: spectrum_span: Wrap buffer change in a function

testing commit 14366da6b59203ef5fc3cf21660113b60c2f1421 with gcc (GCC) 8.1.0
kernel signature: 0c4e1318ea83d97386e54e1daed161db5477d6330ba66ab8e22f69314c41b7a1
all runs: boot failed: kernel panic: VFS: Unable to mount root fs on unknown-block(8,1)
# git bisect skip 14366da6b59203ef5fc3cf21660113b60c2f1421
Bisecting: 799 revisions left to test after this (roughly 10 steps)
[c13a83b01010c94ad7fe68161fd4dae3767d3ffe] rtlwifi: rtl8192ee: use true,false for bool variables

testing commit c13a83b01010c94ad7fe68161fd4dae3767d3ffe with gcc (GCC) 8.1.0
kernel signature: c9f24ea160f19e258ba6098a93cb5210bcff0c9a56f3ead4b314044e1fad2c59
all runs: boot failed: kernel panic: VFS: Unable to mount root fs on unknown-block(8,1)
# git bisect skip c13a83b01010c94ad7fe68161fd4dae3767d3ffe
Bisecting: 799 revisions left to test after this (roughly 10 steps)
[81496b72e9ba1999d4ed7bb7fa407a1edef020a4] r8169: add check for invalid parameter combination in rtl_set_coalesce

testing commit 81496b72e9ba1999d4ed7bb7fa407a1edef020a4 with gcc (GCC) 8.1.0
kernel signature: b3b7fc378f620b641de6fc0636718c525c22b0070f2f48ae6c33e81ffb349f0d
all runs: boot failed: kernel panic: VFS: Unable to mount root fs on unknown-block(8,1)
# git bisect skip 81496b72e9ba1999d4ed7bb7fa407a1edef020a4
Bisecting: 799 revisions left to test after this (roughly 10 steps)
[85325c24d5d2c8fcde35a634742d14d45bf7326e] dt-bindings: ath10k: Add wifi-firmware subnode for wifi node

testing commit 85325c24d5d2c8fcde35a634742d14d45bf7326e with gcc (GCC) 8.1.0
kernel signature: 67dbcad6dd6a80655535d11f01cdf98a98a3dddfef3ce7537b4354ac0b211273
all runs: boot failed: kernel panic: VFS: Unable to mount root fs on unknown-block(8,1)
# git bisect skip 85325c24d5d2c8fcde35a634742d14d45bf7326e
Bisecting: 799 revisions left to test after this (roughly 10 steps)
[c4a0eb9350183d1d188793c534e4141bcf2ccea8] docs: networking: convert xfrm_device.txt to ReST

revisions tested: 33, total time: 8h9m6.954249966s (build: 3h15m43.900648556s, test: 4h50m29.924334264s)
error: bisection is taking too long (>8h0m0s), aborting