ci starts bisection 2023-09-18 19:14:23.128482271 +0000 UTC m=+461407.147606285 bisecting cause commit starting from f0b0d403eabbe135d8dbb40ad5e41018947d336c building syzkaller on 0b6a67ac4b0dc26f43030c5edd01c9175f13b784 ensuring issue is reproducible on original commit f0b0d403eabbe135d8dbb40ad5e41018947d336c testing commit f0b0d403eabbe135d8dbb40ad5e41018947d336c gcc compiler: gcc (Debian 12.2.0-14) 12.2.0, GNU ld (GNU Binutils for Debian) 2.40 kernel signature: ee4a75adfe13b239dce969b570bf2068a985bd8a79bb9d5af789e2fa61f56fe9 all runs: crashed: INFO: task hung in clean_bdev_aliases representative crash: INFO: task hung in clean_bdev_aliases, types: [HANG] check whether we can drop unnecessary instrumentation disabling configs for [UBSAN BUG KASAN LOCKDEP ATOMIC_SLEEP LEAK], they are not needed testing commit f0b0d403eabbe135d8dbb40ad5e41018947d336c gcc compiler: gcc (Debian 12.2.0-14) 12.2.0, GNU ld (GNU Binutils for Debian) 2.40 kernel signature: 943a5284c050e8263adc0314e7a4b1548156c2cb8284d6f408b4bc81089d8c96 all runs: OK false negative chance: 0.000 kconfig minimization: base=3877 full=7684 leaves diff=2018 split chunks (needed=false): <2018> split chunk #0 of len 2018 into 5 parts testing without sub-chunk 1/5 testing commit f0b0d403eabbe135d8dbb40ad5e41018947d336c gcc compiler: gcc (Debian 12.2.0-14) 12.2.0, GNU ld (GNU Binutils for Debian) 2.40 kernel signature: 88a5134ede56ff4bb4388bcff2248da848d5097bf34e12a7f3f7da27692572c2 run #0: crashed: INFO: task hung in clean_bdev_aliases run #1: crashed: INFO: task hung in clean_bdev_aliases run #2: crashed: INFO: task hung in clean_bdev_aliases run #3: crashed: INFO: task hung in clean_bdev_aliases run #4: crashed: INFO: task hung in clean_bdev_aliases run #5: crashed: INFO: task hung in clean_bdev_aliases run #6: crashed: INFO: task hung in clean_bdev_aliases run #7: crashed: INFO: task hung in clean_bdev_aliases run #8: crashed: INFO: task hung in clean_bdev_aliases run #9: OK representative crash: INFO: task hung in clean_bdev_aliases, types: [HANG] the chunk can be dropped testing without sub-chunk 2/5 testing commit f0b0d403eabbe135d8dbb40ad5e41018947d336c gcc compiler: gcc (Debian 12.2.0-14) 12.2.0, GNU ld (GNU Binutils for Debian) 2.40 kernel signature: fb171bc12b02fcf2dc249c4b366aa945aa7914bf8f8f2e58147e5c7e0bb859ca run #0: crashed: INFO: task hung in clean_bdev_aliases run #1: crashed: INFO: task hung in clean_bdev_aliases run #2: crashed: INFO: task hung in clean_bdev_aliases run #3: crashed: INFO: task hung in clean_bdev_aliases run #4: crashed: INFO: task hung in clean_bdev_aliases run #5: crashed: INFO: task hung in clean_bdev_aliases run #6: crashed: INFO: task hung in clean_bdev_aliases run #7: crashed: INFO: task hung in clean_bdev_aliases run #8: OK run #9: OK representative crash: INFO: task hung in clean_bdev_aliases, types: [HANG] the chunk can be dropped testing without sub-chunk 3/5 testing commit f0b0d403eabbe135d8dbb40ad5e41018947d336c gcc compiler: gcc (Debian 12.2.0-14) 12.2.0, GNU ld (GNU Binutils for Debian) 2.40 kernel signature: 71defdb2369467ba95a78b9ad13679065243cd8860f81d83395cbd9927d4c657 run #0: crashed: INFO: task hung in clean_bdev_aliases run #1: crashed: INFO: task hung in clean_bdev_aliases run #2: OK run #3: crashed: INFO: task hung in clean_bdev_aliases run #4: OK run #5: OK run #6: crashed: INFO: task hung in clean_bdev_aliases run #7: OK run #8: OK run #9: OK representative crash: INFO: task hung in clean_bdev_aliases, types: [HANG] the chunk can be dropped testing without sub-chunk 4/5 testing commit f0b0d403eabbe135d8dbb40ad5e41018947d336c gcc compiler: gcc (Debian 12.2.0-14) 12.2.0, GNU ld (GNU Binutils for Debian) 2.40 kernel signature: 3450e8b94e230849e38663d4b8d3d6d569a01715f5886bbc7a141ea8262407b5 run #0: crashed: INFO: task hung in clean_bdev_aliases run #1: crashed: INFO: task hung in clean_bdev_aliases run #2: crashed: INFO: task hung in clean_bdev_aliases run #3: crashed: INFO: task hung in clean_bdev_aliases run #4: crashed: INFO: task hung in clean_bdev_aliases run #5: crashed: INFO: task hung in clean_bdev_aliases run #6: crashed: INFO: task hung in clean_bdev_aliases run #7: crashed: INFO: task hung in clean_bdev_aliases run #8: crashed: INFO: task hung in clean_bdev_aliases run #9: crashed: INFO: task hung in clean_bdev_aliases run #10: crashed: INFO: task hung in clean_bdev_aliases run #11: crashed: INFO: task hung in clean_bdev_aliases run #12: crashed: INFO: task hung in clean_bdev_aliases run #13: crashed: INFO: task hung in clean_bdev_aliases run #14: OK run #15: OK run #16: OK run #17: OK run #18: OK run #19: OK representative crash: INFO: task hung in clean_bdev_aliases, types: [HANG] the chunk can be dropped testing without sub-chunk 5/5 testing commit f0b0d403eabbe135d8dbb40ad5e41018947d336c gcc compiler: gcc (Debian 12.2.0-14) 12.2.0, GNU ld (GNU Binutils for Debian) 2.40 kernel signature: 88473ef1d1b87eb27c469d5d4b8886f797eb454d7ec36252cd935af95ee0a15a run #0: crashed: INFO: task hung in clean_bdev_aliases run #1: crashed: INFO: task hung in clean_bdev_aliases run #2: crashed: INFO: task hung in clean_bdev_aliases run #3: crashed: INFO: task hung in clean_bdev_aliases run #4: crashed: INFO: task hung in clean_bdev_aliases run #5: crashed: INFO: task hung in clean_bdev_aliases run #6: crashed: INFO: task hung in clean_bdev_aliases run #7: crashed: INFO: task hung in clean_bdev_aliases run #8: crashed: INFO: task hung in clean_bdev_aliases run #9: OK run #10: OK run #11: crashed: INFO: task hung in clean_bdev_aliases run #12: OK run #13: OK run #14: OK run #15: OK run #16: OK run #17: crashed: INFO: task hung in clean_bdev_aliases run #18: OK run #19: OK representative crash: INFO: task hung in clean_bdev_aliases, types: [HANG] the chunk can be dropped picked [v6.5 v6.4 v6.3 v6.1 v5.19 v5.17 v5.15 v5.13 v5.10 v5.7 v5.4 v5.1 v4.19] out of 28 release tags testing release v6.5 testing commit 2dde18cd1d8fac735875f2e4987f11817cc0bc2c gcc compiler: gcc (Debian 12.2.0-14) 12.2.0, GNU ld (GNU Binutils for Debian) 2.40 kernel signature: 4aac1dc9e3df54512367fd84835777c89b06bf19492f25f428fd0430c9c7da43 all runs: OK false negative chance: 0.000 # git bisect start f0b0d403eabbe135d8dbb40ad5e41018947d336c 2dde18cd1d8fac735875f2e4987f11817cc0bc2c Bisecting: 7024 revisions left to test after this (roughly 13 steps) [461f35f014466c4e26dca6be0f431f57297df3f2] Merge tag 'drm-next-2023-08-30' of git://anongit.freedesktop.org/drm/drm testing commit 461f35f014466c4e26dca6be0f431f57297df3f2 gcc compiler: gcc (Debian 12.2.0-14) 12.2.0, GNU ld (GNU Binutils for Debian) 2.40 kernel signature: 48b8e08fe5b7015e602b1da442b08fabc45c6787195fb021e1eedfecfa7583c0 run #0: crashed: INFO: task hung in clean_bdev_aliases run #1: crashed: INFO: task hung in clean_bdev_aliases run #2: crashed: INFO: task hung in clean_bdev_aliases run #3: crashed: INFO: task hung in clean_bdev_aliases run #4: crashed: INFO: task hung in clean_bdev_aliases run #5: crashed: INFO: task hung in clean_bdev_aliases run #6: crashed: INFO: task hung in clean_bdev_aliases run #7: crashed: INFO: task hung in clean_bdev_aliases run #8: crashed: INFO: task hung in clean_bdev_aliases run #9: crashed: INFO: task hung in clean_bdev_aliases run #10: crashed: INFO: task hung in clean_bdev_aliases run #11: crashed: INFO: task hung in clean_bdev_aliases run #12: crashed: INFO: task hung in clean_bdev_aliases run #13: crashed: INFO: task hung in clean_bdev_aliases run #14: crashed: INFO: task hung in clean_bdev_aliases run #15: OK run #16: OK run #17: OK run #18: OK run #19: OK representative crash: INFO: task hung in clean_bdev_aliases, types: [HANG] # git bisect bad 461f35f014466c4e26dca6be0f431f57297df3f2 Bisecting: 2408 revisions left to test after this (roughly 12 steps) [bd6c11bc43c496cddfc6cf603b5d45365606dbd5] Merge tag 'net-next-6.6' of git://git.kernel.org/pub/scm/linux/kernel/git/netdev/net-next testing commit bd6c11bc43c496cddfc6cf603b5d45365606dbd5 gcc compiler: gcc (Debian 12.2.0-14) 12.2.0, GNU ld (GNU Binutils for Debian) 2.40 kernel signature: 572a9a14ef8b34b5814c6a1edaadb0c53ea068cb60a9db3d185fd21d8f759460 all runs: OK false negative chance: 0.000 # git bisect good bd6c11bc43c496cddfc6cf603b5d45365606dbd5 Bisecting: 1205 revisions left to test after this (roughly 10 steps) [ef35c7ba60410926d0501e45aad299656a83826c] Revert "Revert "drm/amdgpu/display: change pipe policy for DCN 2.0"" testing commit ef35c7ba60410926d0501e45aad299656a83826c gcc compiler: gcc (Debian 12.2.0-14) 12.2.0, GNU ld (GNU Binutils for Debian) 2.40 kernel signature: 221aebf291426e0dc180f583b9c5a64ddb0a6f94a993252dad69ee4893ed84b2 all runs: OK false negative chance: 0.000 # git bisect good ef35c7ba60410926d0501e45aad299656a83826c Bisecting: 580 revisions left to test after this (roughly 9 steps) [d68b4b6f307d155475cce541f2aee938032ed22e] Merge tag 'mm-nonmm-stable-2023-08-28-22-48' of git://git.kernel.org/pub/scm/linux/kernel/git/akpm/mm testing commit d68b4b6f307d155475cce541f2aee938032ed22e gcc compiler: gcc (Debian 12.2.0-14) 12.2.0, GNU ld (GNU Binutils for Debian) 2.40 kernel signature: 0290640e9233d0e9d86868264d560811d0cbd1355deeb42c5c3769a4be8732a2 all runs: OK false negative chance: 0.000 # git bisect good d68b4b6f307d155475cce541f2aee938032ed22e Bisecting: 295 revisions left to test after this (roughly 8 steps) [87fa732dc5ff9ea6a2e75b630f7931899e845eb1] Merge tag 'x86-core-2023-08-30-v2' of git://git.kernel.org/pub/scm/linux/kernel/git/tip/tip testing commit 87fa732dc5ff9ea6a2e75b630f7931899e845eb1 gcc compiler: gcc (Debian 12.2.0-14) 12.2.0, GNU ld (GNU Binutils for Debian) 2.40 kernel signature: f6429fe6cac0e79f46723da115d869dc0a9e0f4eeac12e36d84e699bebbae10d run #0: crashed: INFO: task hung in clean_bdev_aliases run #1: crashed: INFO: task hung in clean_bdev_aliases run #2: crashed: INFO: task hung in clean_bdev_aliases run #3: crashed: INFO: task hung in clean_bdev_aliases run #4: crashed: INFO: task hung in clean_bdev_aliases run #5: crashed: INFO: task hung in clean_bdev_aliases run #6: crashed: INFO: task hung in clean_bdev_aliases run #7: crashed: INFO: task hung in clean_bdev_aliases run #8: crashed: INFO: task hung in clean_bdev_aliases run #9: crashed: INFO: task hung in clean_bdev_aliases run #10: crashed: INFO: task hung in clean_bdev_aliases run #11: crashed: INFO: task hung in clean_bdev_aliases run #12: crashed: INFO: task hung in clean_bdev_aliases run #13: crashed: INFO: task hung in clean_bdev_aliases run #14: OK run #15: OK run #16: OK run #17: OK run #18: OK run #19: OK representative crash: INFO: task hung in clean_bdev_aliases, types: [HANG] # git bisect bad 87fa732dc5ff9ea6a2e75b630f7931899e845eb1 Bisecting: 168 revisions left to test after this (roughly 7 steps) [146afeb235ccec10c17ad8ea26327c0c79dbd968] block: use strscpy() to instead of strncpy() testing commit 146afeb235ccec10c17ad8ea26327c0c79dbd968 gcc compiler: gcc (Debian 12.2.0-14) 12.2.0, GNU ld (GNU Binutils for Debian) 2.40 kernel signature: b546e749f4a2a3ce88594d9367bf7e2101c816f91f2f0709de027a49cfa6841e run #0: crashed: INFO: task hung in corrupted run #1: crashed: kernel panic: hung_task: blocked tasks run #2: crashed: INFO: task hung in clean_bdev_aliases run #3: crashed: INFO: task hung in clean_bdev_aliases run #4: OK run #5: OK run #6: OK run #7: OK run #8: OK run #9: OK run #10: OK run #11: OK run #12: OK run #13: OK run #14: OK run #15: OK run #16: OK run #17: OK run #18: OK run #19: OK representative crash: INFO: task hung in corrupted, types: [HANG UNKNOWN] # git bisect bad 146afeb235ccec10c17ad8ea26327c0c79dbd968 Bisecting: 57 revisions left to test after this (roughly 6 steps) [44abfa6a95df425c0660d56043020b67e6d93ab8] md/md-bitmap: hold 'reconfig_mutex' in backlog_store() testing commit 44abfa6a95df425c0660d56043020b67e6d93ab8 gcc compiler: gcc (Debian 12.2.0-14) 12.2.0, GNU ld (GNU Binutils for Debian) 2.40 kernel signature: 208632981adbeefdf1efddbd2bb5ca3854f251acc3c5900854ed7f68054b7309 all runs: OK false negative chance: 0.000 # git bisect good 44abfa6a95df425c0660d56043020b67e6d93ab8 Bisecting: 28 revisions left to test after this (roughly 5 steps) [66a6a5d0ec852eaced589da066376e69397cd71e] ublk: Switch to memdup_user_nul() helper testing commit 66a6a5d0ec852eaced589da066376e69397cd71e gcc compiler: gcc (Debian 12.2.0-14) 12.2.0, GNU ld (GNU Binutils for Debian) 2.40 kernel signature: 119ee9f5f805ad853aca206257e31df0854d81cfdbb7c09da280fdba955287af run #0: crashed: INFO: task hung in clean_bdev_aliases run #1: crashed: INFO: task hung in clean_bdev_aliases run #2: OK run #3: crashed: INFO: task hung in clean_bdev_aliases run #4: crashed: INFO: task hung in clean_bdev_aliases run #5: crashed: INFO: task hung in clean_bdev_aliases run #6: basic kernel testing failed: failed to copy binary to VM: timedout after 1m0s ["scp" "-P" "22" "-F" "/dev/null" "-o" "UserKnownHostsFile=/dev/null" "-o" "BatchMode=yes" "-o" "IdentitiesOnly=yes" "-o" "StrictHostKeyChecking=no" "-o" "ConnectTimeout=10" "-v" "/tmp/syz-executor1983049749" "root@10.128.1.162:./syz-executor1983049749"] Executing: program /usr/bin/ssh host 10.128.1.162, user root, command sftp OpenSSH_9.2p1 Debian-2, OpenSSL 3.0.9 30 May 2023 debug1: Reading configuration data /dev/null debug1: Connecting to 10.128.1.162 [10.128.1.162] port 22. debug1: fd 3 clearing O_NONBLOCK debug1: Connection established. debug1: identity file /root/.ssh/id_rsa type -1 debug1: identity file /root/.ssh/id_rsa-cert type -1 debug1: identity file /root/.ssh/id_ecdsa type -1 debug1: identity file /root/.ssh/id_ecdsa-cert type -1 debug1: identity file /root/.ssh/id_ecdsa_sk type -1 debug1: identity file /root/.ssh/id_ecdsa_sk-cert type -1 debug1: identity file /root/.ssh/id_ed25519 type -1 debug1: identity file /root/.ssh/id_ed25519-cert type -1 debug1: identity file /root/.ssh/id_ed25519_sk type -1 debug1: identity file /root/.ssh/id_ed25519_sk-cert type -1 debug1: identity file /root/.ssh/id_xmss type -1 debug1: identity file /root/.ssh/id_xmss-cert type -1 debug1: identity file /root/.ssh/id_dsa type -1 debug1: identity file /root/.ssh/id_dsa-cert type -1 debug1: Local version string SSH-2.0-OpenSSH_9.2p1 Debian-2 debug1: Remote protocol version 2.0, remote software version OpenSSH_9.1 debug1: compat_banner: match: OpenSSH_9.1 pat OpenSSH* compat 0x04000000 debug1: Authenticating to 10.128.1.162:22 as 'root' debug1: load_hostkeys: fopen /etc/ssh/ssh_known_hosts: No such file or directory debug1: load_hostkeys: fopen /etc/ssh/ssh_known_hosts2: No such file or directory debug1: SSH2_MSG_KEXINIT sent debug1: SSH2_MSG_KEXINIT received debug1: kex: algorithm: sntrup761x25519-sha512@openssh.com debug1: kex: host key algorithm: ssh-ed25519 debug1: kex: server->client cipher: chacha20-poly1305@openssh.com MAC: compression: none debug1: kex: client->server cipher: chacha20-poly1305@openssh.com MAC: compression: none debug1: expecting SSH2_MSG_KEX_ECDH_REPLY debug1: SSH2_MSG_KEX_ECDH_REPLY received debug1: Server host key: ssh-ed25519 SHA256:88IuL3orPAmVsyjIy2DvkKzVRHqGoDXxazNYOfOHasg debug1: load_hostkeys: fopen /etc/ssh/ssh_known_hosts: No such file or directory debug1: load_hostkeys: fopen /etc/ssh/ssh_known_hosts2: No such file or directory Warning: Permanently added '10.128.1.162' (ED25519) to the list of known hosts. debug1: rekey out after 134217728 blocks debug1: SSH2_MSG_NEWKEYS sent debug1: expecting SSH2_MSG_NEWKEYS debug1: SSH2_MSG_NEWKEYS received debug1: rekey in after 134217728 blocks debug1: Will attempt key: /root/.ssh/id_rsa debug1: Will attempt key: /root/.ssh/id_ecdsa debug1: Will attempt key: /root/.ssh/id_ecdsa_sk debug1: Will attempt key: /root/.ssh/id_ed25519 debug1: Will attempt key: /root/.ssh/id_ed25519_sk debug1: Will attempt key: /root/.ssh/id_xmss debug1: Will attempt key: /root/.ssh/id_dsa debug1: SSH2_MSG_EXT_INFO received debug1: kex_input_ext_info: server-sig-algs= debug1: kex_input_ext_info: publickey-hostbound@openssh.com=<0> debug1: SSH2_MSG_SERVICE_ACCEPT received Authenticated to 10.128.1.162 ([10.128.1.162]:22) using "none". debug1: channel 0: new session [client-session] (inactive timeout: 0) debug1: Requesting no-more-sessions@openssh.com debug1: Entering interactive session. debug1: pledge: network debug1: client_input_global_request: rtype hostkeys-00@openssh.com want_reply 0 debug1: Sending subsystem: sftp debug1: pledge: fork run #7: crashed: INFO: task hung in clean_bdev_aliases run #8: OK run #9: OK run #10: crashed: INFO: task hung in clean_bdev_aliases run #11: OK run #12: OK run #13: OK run #14: OK run #15: crashed: INFO: task hung in clean_bdev_aliases run #16: OK run #17: OK run #18: OK run #19: OK representative crash: INFO: task hung in clean_bdev_aliases, types: [HANG] # git bisect bad 66a6a5d0ec852eaced589da066376e69397cd71e Bisecting: 14 revisions left to test after this (roughly 4 steps) [29802d7ca33bc0a75c9da2a143eeed4f9e99fca4] ublk: enable zoned storage support testing commit 29802d7ca33bc0a75c9da2a143eeed4f9e99fca4 gcc compiler: gcc (Debian 12.2.0-14) 12.2.0, GNU ld (GNU Binutils for Debian) 2.40 kernel signature: ccea1c5f596b3bdbccc27937dd6334acbc0f5a0f280d78fbe9e50d19b7eed7ff run #0: crashed: INFO: task hung in clean_bdev_aliases run #1: crashed: INFO: task hung in clean_bdev_aliases run #2: crashed: INFO: task hung in clean_bdev_aliases run #3: crashed: INFO: task hung in corrupted run #4: crashed: INFO: task hung in clean_bdev_aliases run #5: crashed: kernel panic: hung_task: blocked tasks run #6: crashed: INFO: task hung in clean_bdev_aliases run #7: crashed: INFO: task hung in clean_bdev_aliases run #8: crashed: INFO: task hung in clean_bdev_aliases run #9: crashed: INFO: task hung in clean_bdev_aliases run #10: OK run #11: OK run #12: OK run #13: crashed: INFO: task hung in clean_bdev_aliases run #14: OK run #15: OK run #16: OK run #17: OK run #18: OK run #19: OK representative crash: INFO: task hung in clean_bdev_aliases, types: [HANG] # git bisect bad 29802d7ca33bc0a75c9da2a143eeed4f9e99fca4 Bisecting: 6 revisions left to test after this (roughly 3 steps) [925c86a19bacf8ce10eb666328fb3fa5aff7b951] fs: add CONFIG_BUFFER_HEAD testing commit 925c86a19bacf8ce10eb666328fb3fa5aff7b951 gcc compiler: gcc (Debian 12.2.0-14) 12.2.0, GNU ld (GNU Binutils for Debian) 2.40 kernel signature: f057d17fd4a5e158bb84e539ad3979121678c284f1273460e7502ca8d9d64c4a run #0: crashed: INFO: task hung in clean_bdev_aliases run #1: crashed: INFO: task hung in clean_bdev_aliases run #2: crashed: INFO: task hung in clean_bdev_aliases run #3: OK run #4: OK run #5: OK run #6: OK run #7: OK run #8: OK run #9: OK run #10: OK run #11: OK run #12: OK run #13: OK run #14: OK run #15: OK run #16: OK run #17: OK run #18: OK run #19: OK representative crash: INFO: task hung in clean_bdev_aliases, types: [HANG] # git bisect bad 925c86a19bacf8ce10eb666328fb3fa5aff7b951 Bisecting: 3 revisions left to test after this (roughly 2 steps) [2ba39cc46bfe463cb9673bf62a04c4c21942f1f2] fs: rename and move block_page_mkwrite_return testing commit 2ba39cc46bfe463cb9673bf62a04c4c21942f1f2 gcc compiler: gcc (Debian 12.2.0-14) 12.2.0, GNU ld (GNU Binutils for Debian) 2.40 kernel signature: 4a27eff4109d6b4d8539d9b849daaa4e50ac2a5c5f99ba54b61adeb57b5c918b all runs: OK false negative chance: 0.002 # git bisect good 2ba39cc46bfe463cb9673bf62a04c4c21942f1f2 Bisecting: 1 revision left to test after this (roughly 1 step) [a05f7bd9578b17521a9a5f3689f3934c082c6390] block: stop setting ->direct_IO testing commit a05f7bd9578b17521a9a5f3689f3934c082c6390 gcc compiler: gcc (Debian 12.2.0-14) 12.2.0, GNU ld (GNU Binutils for Debian) 2.40 kernel signature: 6676a57140ae0a0b58f93b7d468703a339acfaabfb4fe45400f768c5d82ba7f1 all runs: OK false negative chance: 0.002 # git bisect good a05f7bd9578b17521a9a5f3689f3934c082c6390 Bisecting: 0 revisions left to test after this (roughly 0 steps) [487c607df790d366e67a7d6a30adf785cdd98e55] block: use iomap for writes to block devices testing commit 487c607df790d366e67a7d6a30adf785cdd98e55 gcc compiler: gcc (Debian 12.2.0-14) 12.2.0, GNU ld (GNU Binutils for Debian) 2.40 kernel signature: d3acbc216ad0f54b8f2c74e15968677aa0669966516622b4a004f1af8a9104c9 run #0: crashed: INFO: task hung in clean_bdev_aliases run #1: crashed: INFO: task hung in clean_bdev_aliases run #2: crashed: INFO: task hung in clean_bdev_aliases run #3: OK run #4: crashed: INFO: task hung in clean_bdev_aliases run #5: crashed: INFO: task hung in clean_bdev_aliases run #6: OK run #7: OK run #8: OK run #9: OK run #10: OK run #11: OK run #12: OK run #13: OK run #14: OK run #15: OK run #16: OK run #17: OK run #18: OK run #19: OK representative crash: INFO: task hung in clean_bdev_aliases, types: [HANG] # git bisect bad 487c607df790d366e67a7d6a30adf785cdd98e55 487c607df790d366e67a7d6a30adf785cdd98e55 is the first bad commit commit 487c607df790d366e67a7d6a30adf785cdd98e55 Author: Christoph Hellwig Date: Tue Aug 1 19:22:00 2023 +0200 block: use iomap for writes to block devices Use iomap in buffer_head compat mode to write to block devices. Signed-off-by: Christoph Hellwig Reviewed-by: Luis Chamberlain Reviewed-by: Pankaj Raghav Reviewed-by: Hannes Reinecke Reviewed-by: Johannes Thumshirn Reviewed-by: Christian Brauner Link: https://lore.kernel.org/r/20230801172201.1923299-6-hch@lst.de Signed-off-by: Jens Axboe block/Kconfig | 1 + block/fops.c | 31 +++++++++++++++++++++++++++++-- 2 files changed, 30 insertions(+), 2 deletions(-) accumulated error probability: 0.00 culprit signature: d3acbc216ad0f54b8f2c74e15968677aa0669966516622b4a004f1af8a9104c9 parent signature: 6676a57140ae0a0b58f93b7d468703a339acfaabfb4fe45400f768c5d82ba7f1 reproducer is flaky (0.26 repro chance estimate) revisions tested: 21, total time: 7h36m57.177967785s (build: 3h4m36.005869985s, test: 4h18m40.098169311s) first bad commit: 487c607df790d366e67a7d6a30adf785cdd98e55 block: use iomap for writes to block devices recipients (to): ["axboe@kernel.dk" "brauner@kernel.org" "hare@suse.de" "hch@lst.de" "johannes.thumshirn@wdc.com" "mcgrof@kernel.org" "p.raghav@samsung.com"] recipients (cc): [] crash: INFO: task hung in clean_bdev_aliases INFO: task syz-executor.4:20349 blocked for more than 143 seconds. Not tainted 6.5.0-rc2-syzkaller #0 "echo 0 > /proc/sys/kernel/hung_task_timeout_secs" disables this message. task:syz-executor.4 state:D stack:27296 pid:20349 ppid:1407 flags:0x00004006 Call Trace: context_switch kernel/sched/core.c:5381 [inline] __schedule+0xc44/0x3060 kernel/sched/core.c:6710 schedule+0xe7/0x1b0 kernel/sched/core.c:6786 io_schedule+0xbe/0x130 kernel/sched/core.c:9028 folio_wait_bit_common+0x2c2/0x720 mm/filemap.c:1304 folio_lock include/linux/pagemap.h:959 [inline] clean_bdev_aliases+0x439/0x4d0 fs/buffer.c:1740 clean_bdev_bh_alias include/linux/buffer_head.h:228 [inline] __block_write_begin_int+0x657/0x1060 fs/buffer.c:2130 iomap_write_begin+0x42f/0x1220 fs/iomap/buffered-io.c:679 iomap_write_iter fs/iomap/buffered-io.c:816 [inline] iomap_file_buffered_write+0x348/0x6c0 fs/iomap/buffered-io.c:873 blkdev_buffered_write block/fops.c:583 [inline] blkdev_write_iter+0x426/0xb20 block/fops.c:637 call_write_iter include/linux/fs.h:1871 [inline] do_iter_readv_writev+0x1a8/0x2f0 fs/read_write.c:735 do_iter_write+0x132/0x7b0 fs/read_write.c:860 iter_file_splice_write+0x563/0xad0 fs/splice.c:739 do_splice_from fs/splice.c:934 [inline] direct_splice_actor+0x105/0x1d0 fs/splice.c:1143 splice_direct_to_actor+0x2c0/0x9a0 fs/splice.c:1089 do_splice_direct+0x151/0x260 fs/splice.c:1195 do_sendfile+0x912/0x1270 fs/read_write.c:1254 __do_sys_sendfile64 fs/read_write.c:1322 [inline] __se_sys_sendfile64 fs/read_write.c:1308 [inline] __x64_sys_sendfile64+0x193/0x1d0 fs/read_write.c:1308 do_syscall_x64 arch/x86/entry/common.c:50 [inline] do_syscall_64+0x38/0x80 arch/x86/entry/common.c:80 entry_SYSCALL_64_after_hwframe+0x63/0xcd RIP: 0033:0x7f3e9491eae9 RSP: 002b:00007f3e944a10c8 EFLAGS: 00000246 ORIG_RAX: 0000000000000028 RAX: ffffffffffffffda RBX: 00007f3e94a3df80 RCX: 00007f3e9491eae9 RDX: 0000000000000000 RSI: 0000000000000004 RDI: 0000000000000003 RBP: 00007f3e9496a47a R08: 0000000000000000 R09: 0000000000000000 R10: 0100000000000042 R11: 0000000000000246 R12: 0000000000000000 R13: 0000000000000006 R14: 00007f3e94a3df80 R15: 00007ffeb6230048 Showing all locks held in the system: 1 lock held by rcu_tasks_kthre/12: #0: ffffffff840a3350 (rcu_tasks.tasks_gp_mutex){+.+.}-{3:3}, at: rcu_tasks_one_gp+0x2c/0xe20 kernel/rcu/tasks.h:522 1 lock held by khungtaskd/26: #0: ffffffff840a3f60 (rcu_read_lock){....}-{1:2}, at: debug_show_all_locks+0x55/0x340 kernel/locking/lockdep.c:6615 2 locks held by kworker/u4:6/430: #0: ffff888100077138 ((wq_completion)events_unbound){+.+.}-{0:0}, at: arch_atomic64_set arch/x86/include/asm/atomic64_64.h:20 [inline] #0: ffff888100077138 ((wq_completion)events_unbound){+.+.}-{0:0}, at: raw_atomic64_set include/linux/atomic/atomic-arch-fallback.h:2608 [inline] #0: ffff888100077138 ((wq_completion)events_unbound){+.+.}-{0:0}, at: raw_atomic_long_set include/linux/atomic/atomic-long.h:79 [inline] #0: ffff888100077138 ((wq_completion)events_unbound){+.+.}-{0:0}, at: atomic_long_set include/linux/atomic/atomic-instrumented.h:3196 [inline] #0: ffff888100077138 ((wq_completion)events_unbound){+.+.}-{0:0}, at: set_work_data kernel/workqueue.c:675 [inline] #0: ffff888100077138 ((wq_completion)events_unbound){+.+.}-{0:0}, at: set_work_pool_and_clear_pending kernel/workqueue.c:702 [inline] #0: ffff888100077138 ((wq_completion)events_unbound){+.+.}-{0:0}, at: process_one_work+0x85f/0x1520 kernel/workqueue.c:2567 #1: ffffc90001b6fd98 ((reaper_work).work){+.+.}-{0:0}, at: process_one_work+0x88c/0x1520 kernel/workqueue.c:2571 2 locks held by getty/763: #0: ffff888107ba8098 (&tty->ldisc_sem){++++}-{0:0}, at: tty_ldisc_ref_wait+0x23/0x80 drivers/tty/tty_ldisc.c:243 #1: ffffc900002632f0 (&ldata->atomic_read_lock){+.+.}-{3:3}, at: n_tty_read+0xc6c/0x1310 drivers/tty/n_tty.c:2187 ============================================= NMI backtrace for cpu 0 CPU: 0 PID: 26 Comm: khungtaskd Not tainted 6.5.0-rc2-syzkaller #0 Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 08/04/2023 Call Trace: __dump_stack lib/dump_stack.c:88 [inline] dump_stack_lvl+0x5c/0xb0 lib/dump_stack.c:106 nmi_cpu_backtrace+0x167/0x210 lib/nmi_backtrace.c:113 nmi_trigger_cpumask_backtrace+0x1d4/0x210 lib/nmi_backtrace.c:62 trigger_all_cpu_backtrace include/linux/nmi.h:160 [inline] check_hung_uninterruptible_tasks kernel/hung_task.c:222 [inline] watchdog+0xa22/0xca0 kernel/hung_task.c:379 kthread+0x2e6/0x3c0 kernel/kthread.c:389 ret_from_fork+0x2c/0x70 arch/x86/kernel/process.c:145 ret_from_fork_asm+0x11/0x20 arch/x86/entry/entry_64.S:296 RIP: 0000:0x0 Code: Unable to access opcode bytes at 0xffffffffffffffd6. RSP: 0000:0000000000000000 EFLAGS: 00000000 ORIG_RAX: 0000000000000000 RAX: 0000000000000000 RBX: 0000000000000000 RCX: 0000000000000000 RDX: 0000000000000000 RSI: 0000000000000000 RDI: 0000000000000000 RBP: 0000000000000000 R08: 0000000000000000 R09: 0000000000000000 R10: 0000000000000000 R11: 0000000000000000 R12: 0000000000000000 R13: 0000000000000000 R14: 0000000000000000 R15: 0000000000000000 Sending NMI from CPU 0 to CPUs 1: NMI backtrace for cpu 1 CPU: 1 PID: 8882 Comm: syz-executor.0 Not tainted 6.5.0-rc2-syzkaller #0 Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 08/04/2023 RIP: 0010:_raw_spin_lock+0x4/0x40 kernel/locking/spinlock.c:153 Code: eb ef fd 2e 2e 2e 31 c0 48 89 ea 48 89 df 5b 5d 31 f6 e9 2f 8b f4 fe cc cc cc cc cc cc cc cc cc cc cc cc cc cc cc f3 0f 1e fa <53> 48 89 fb bf 01 00 00 00 e8 7e 08 f0 fd 45 31 c9 41 b8 01 00 00 RSP: 0018:ffffc9000154fc18 EFLAGS: 00000283 RAX: ffff88811f9a2820 RBX: ffff88811f9a2240 RCX: 0000000000000001 RDX: 1ffff11021f70432 RSI: ffffffff83806be0 RDI: ffff88811f9a2b68 RBP: ffff88811f9a2240 R08: 0000000000000000 R09: fffffbfff0cb9f38 R10: ffffffff865cf9c7 R11: ffff888108f98000 R12: ffff88811f9a2b68 R13: ffff88811f9a2ab8 R14: dffffc0000000000 R15: ffff888104f3ecc0 FS: 0000555556d02480(0000) GS:ffff8881f7100000(0000) knlGS:0000000000000000 CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033 CR2: 00007f2947cfebc0 CR3: 00000001261a2000 CR4: 00000000003506e0 DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000 DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400 Call Trace: spin_lock include/linux/spinlock.h:351 [inline] task_lock include/linux/sched/task.h:185 [inline] find_lock_task_mm+0xb7/0x240 mm/oom_kill.c:140 __set_oom_adj.isra.0+0x891/0xe10 fs/proc/base.c:1098 oom_score_adj_write+0x172/0x1a0 fs/proc/base.c:1237 vfs_write+0x208/0xd50 fs/read_write.c:582 ksys_write+0xf6/0x1d0 fs/read_write.c:637 do_syscall_x64 arch/x86/entry/common.c:50 [inline] do_syscall_64+0x38/0x80 arch/x86/entry/common.c:80 entry_SYSCALL_64_after_hwframe+0x63/0xcd RIP: 0033:0x7f2947c7a7f0 Code: 40 00 48 c7 c2 b0 ff ff ff f7 d8 64 89 02 48 c7 c0 ff ff ff ff eb b7 0f 1f 00 80 3d 11 07 10 00 00 74 17 b8 01 00 00 00 0f 05 <48> 3d 00 f0 ff ff 77 58 c3 0f 1f 80 00 00 00 00 48 83 ec 28 48 89 RSP: 002b:00007ffd40574828 EFLAGS: 00000202 ORIG_RAX: 0000000000000001 RAX: ffffffffffffffda RBX: 0000000000000003 RCX: 00007f2947c7a7f0 RDX: 0000000000000004 RSI: 00007ffd40574850 RDI: 0000000000000003 RBP: 00007f2947cc7502 R08: 0000000000000000 R09: 0000000000000000 R10: 0000000000000000 R11: 0000000000000202 R12: 0000000000000004 R13: 00007ffd40574850 R14: 0000000000000001 R15: 0000000000000000