bisecting cause commit starting from c11d28ab4a691736e30b49813fb801847bd44e83 building syzkaller on 9682898d6f14dd27f95c419d059fd867bb91b22b testing commit c11d28ab4a691736e30b49813fb801847bd44e83 with gcc (GCC) 8.1.0 kernel signature: 341c72353a7f8ea62992e724fdc315a770c749b8a1ee821230fbecf97f991219 all runs: crashed: KASAN: use-after-free Read in uif_close testing release v5.6 testing commit 7111951b8d4973bda27ff663f2cf18b663d15b48 with gcc (GCC) 8.1.0 kernel signature: 559f1285b10cc81c6971ceb0750ed31815baa0ebb26efad701ff2112e0a4ca21 all runs: OK # git bisect start c11d28ab4a691736e30b49813fb801847bd44e83 7111951b8d4973bda27ff663f2cf18b663d15b48 Bisecting: 13326 revisions left to test after this (roughly 14 steps) [74cd3984f13381049627cfa260fd87e6fcd31add] media: imx: utils: Split find|enum_format into fourcc and mbus functions testing commit 74cd3984f13381049627cfa260fd87e6fcd31add with gcc (GCC) 8.1.0 kernel signature: 48bf73ef561952a00c266e74e49c7c5339fb57e1a621c971e7aa8e56b46f2480 all runs: OK # git bisect good 74cd3984f13381049627cfa260fd87e6fcd31add Bisecting: 6630 revisions left to test after this (roughly 13 steps) [8bf9e28a25c6bbff58513b8175620e096368ede4] Merge remote-tracking branch 'net-next/master' testing commit 8bf9e28a25c6bbff58513b8175620e096368ede4 with gcc (GCC) 8.1.0 kernel signature: a6653ffc33127f9cf8fc2f5286a547d0d24d588ca41eb2a09260f3489a61ef7c all runs: crashed: KASAN: use-after-free Read in uif_close # git bisect bad 8bf9e28a25c6bbff58513b8175620e096368ede4 Bisecting: 3347 revisions left to test after this (roughly 12 steps) [e0b0f9fd6d0a1f228f3c09958e25def4865454db] Merge remote-tracking branch 'sh/sh-next' testing commit e0b0f9fd6d0a1f228f3c09958e25def4865454db with gcc (GCC) 8.1.0 kernel signature: 38be57ac98572f003f5c522aceaea260f16c2fd8816c51b62f691f7c9d2dd7c9 all runs: crashed: KASAN: use-after-free Read in uif_close # git bisect bad e0b0f9fd6d0a1f228f3c09958e25def4865454db Bisecting: 1671 revisions left to test after this (roughly 11 steps) [7e71515c910d8a1ce0a780982f41f921616a97d6] Merge remote-tracking branch 'drm-fixes/drm-fixes' testing commit 7e71515c910d8a1ce0a780982f41f921616a97d6 with gcc (GCC) 8.1.0 kernel signature: f72375b20d36b0f009cb56cf13b7181ac0b546475586d2daf925f0aaafe29077 all runs: crashed: KASAN: use-after-free Read in uif_close # git bisect bad 7e71515c910d8a1ce0a780982f41f921616a97d6 Bisecting: 837 revisions left to test after this (roughly 10 steps) [17e34526f0a8f81a214d1ee6f7d8ad2a9c9bae33] mm/vmscan: remove unnecessary argument description of isolate_lru_pages() testing commit 17e34526f0a8f81a214d1ee6f7d8ad2a9c9bae33 with gcc (GCC) 8.1.0 kernel signature: b6ed2fd9885ff467801d59fc21ab6c6bd012a1913962dc498b6dc965ccd27f31 run #0: crashed: INFO: task hung in ubi_detach_mtd_dev run #1: OK run #2: OK run #3: OK run #4: OK run #5: OK run #6: OK run #7: OK run #8: OK run #9: OK # git bisect bad 17e34526f0a8f81a214d1ee6f7d8ad2a9c9bae33 Bisecting: 418 revisions left to test after this (roughly 9 steps) [edf17b283844a21b338b9618107c8817105d0ffa] Merge tag 'staging-5.7-rc3' of git://git.kernel.org/pub/scm/linux/kernel/git/gregkh/staging testing commit edf17b283844a21b338b9618107c8817105d0ffa with gcc (GCC) 8.1.0 kernel signature: 26ebf5066fe344197123f1bd0bd61177fc38bbb2752f81e8f94f16fe490bb839 run #0: crashed: INFO: task hung in ctrl_cdev_ioctl run #1: OK run #2: OK run #3: OK run #4: OK run #5: OK run #6: OK run #7: OK run #8: OK run #9: OK # git bisect bad edf17b283844a21b338b9618107c8817105d0ffa Bisecting: 208 revisions left to test after this (roughly 8 steps) [b9916af776013051a34ccf47bc5e13acffef16c3] Merge tag 'kbuild-fixes-v5.7' of git://git.kernel.org/pub/scm/linux/kernel/git/masahiroy/linux-kbuild testing commit b9916af776013051a34ccf47bc5e13acffef16c3 with gcc (GCC) 8.1.0 kernel signature: b22f165dd13f9c4be867f2920c9aa66013f3e69dd422581ea8354084ff110e9d all runs: OK # git bisect good b9916af776013051a34ccf47bc5e13acffef16c3 Bisecting: 97 revisions left to test after this (roughly 7 steps) [167ff131cb3dffccab8bb4d65a8d72e7c5ffc398] Merge git://git.kernel.org/pub/scm/linux/kernel/git/bpf/bpf testing commit 167ff131cb3dffccab8bb4d65a8d72e7c5ffc398 with gcc (GCC) 8.1.0 kernel signature: 01fbc8de9acc936e25cd623bf619d40a8d1808f82db508f41668ff478bbb0a7a all runs: OK # git bisect good 167ff131cb3dffccab8bb4d65a8d72e7c5ffc398 Bisecting: 49 revisions left to test after this (roughly 6 steps) [acd629446804617a8fe4700fc4ca16eb44aa4efd] Merge tag 'timers-urgent-2020-04-25' of git://git.kernel.org/pub/scm/linux/kernel/git/tip/tip testing commit acd629446804617a8fe4700fc4ca16eb44aa4efd with gcc (GCC) 8.1.0 kernel signature: f06d115d96904f197024ef814bf55ad9ed900919f8742fa710c2fd6eea8593b2 all runs: OK # git bisect good acd629446804617a8fe4700fc4ca16eb44aa4efd Bisecting: 24 revisions left to test after this (roughly 5 steps) [09057742af98a39ebffa27fac4f889dc873132de] staging: vt6656: Fix drivers TBTT timing counter. testing commit 09057742af98a39ebffa27fac4f889dc873132de with gcc (GCC) 8.1.0 kernel signature: 7ad395c26c393269c796209ae697bf986bb9e10bbfa2b88c708bed89248f0e54 all runs: OK # git bisect good 09057742af98a39ebffa27fac4f889dc873132de Bisecting: 12 revisions left to test after this (roughly 4 steps) [670bcd79b5237deaf1518cfc90d5058b52ea5ac8] Merge tag 'powerpc-5.7-3' of git://git.kernel.org/pub/scm/linux/kernel/git/powerpc/linux testing commit 670bcd79b5237deaf1518cfc90d5058b52ea5ac8 with gcc (GCC) 8.1.0 kernel signature: aa337e7883c718c7c0650328f4128181036c95cc0582a7e629a87487011ef36c all runs: OK # git bisect good 670bcd79b5237deaf1518cfc90d5058b52ea5ac8 Bisecting: 8 revisions left to test after this (roughly 3 steps) [5a3577039cbe0bbb8e7a12d2790e23039b8a8618] firmware_loader: revert removal of the fw_fallback_config export testing commit 5a3577039cbe0bbb8e7a12d2790e23039b8a8618 with gcc (GCC) 8.1.0 kernel signature: 5e0bc3891f8f9d5524716f7e304fbb750df2b4b9fe4eb5a0557b27ed3afe0fd3 run #0: crashed: INFO: task hung in ubi_detach_mtd_dev run #1: OK run #2: OK run #3: OK run #4: OK run #5: OK run #6: OK run #7: OK run #8: OK run #9: OK # git bisect bad 5a3577039cbe0bbb8e7a12d2790e23039b8a8618 Bisecting: 1 revision left to test after this (roughly 1 step) [739604734bd8e4ad71a6a902473109b2d2904890] firmware_loader: remove unused exports testing commit 739604734bd8e4ad71a6a902473109b2d2904890 with gcc (GCC) 8.1.0 kernel signature: acc7004ef348fd6999040daf525224d7d80cdf24458094565c9d68917db5ad3d run #0: crashed: INFO: task hung in ctrl_cdev_ioctl run #1: OK run #2: OK run #3: OK run #4: OK run #5: OK run #6: OK run #7: OK run #8: OK run #9: OK # git bisect bad 739604734bd8e4ad71a6a902473109b2d2904890 Bisecting: 0 revisions left to test after this (roughly 0 steps) [32ec783ae19d48084b893cc54747fed37b07eb0c] firmware: imx: fix compile-testing testing commit 32ec783ae19d48084b893cc54747fed37b07eb0c with gcc (GCC) 8.1.0 kernel signature: a7e8363c1c03df83f2409ef7362f9d98a9baed67105bb274648a09d9aecb30c0 run #0: crashed: INFO: task hung in ctrl_cdev_ioctl run #1: OK run #2: OK run #3: OK run #4: OK run #5: OK run #6: OK run #7: OK run #8: OK run #9: OK # git bisect bad 32ec783ae19d48084b893cc54747fed37b07eb0c 32ec783ae19d48084b893cc54747fed37b07eb0c is the first bad commit commit 32ec783ae19d48084b893cc54747fed37b07eb0c Author: Arnd Bergmann Date: Wed Apr 8 21:02:57 2020 +0200 firmware: imx: fix compile-testing It is nice to allow compile-testing the firmware drivers, but this fails when the dependency is a loadable module: aarch64-linux-ld: drivers/firmware/imx/scu-pd.o: in function `imx_sc_pd_power': scu-pd.c:(.text+0xd8): undefined reference to `imx_scu_call_rpc' aarch64-linux-ld: scu-pd.c:(.text+0x108): undefined reference to `imx_scu_call_rpc' aarch64-linux-ld: drivers/firmware/imx/scu-pd.o: in function `imx_sc_pd_probe': Change the dependencies to ensure that any driver we depend on is either reachable or we are compile-testing and it is disabled, effectively reverting most of the previous changes that turned out to be incorrect. Fixes: a9f85f93ed73 ("firmware: imx: add COMPILE_TEST support") Fixes: 5b00b8375416 ("firmware: imx: add COMPILE_TEST for IMX_SCU driver") Signed-off-by: Arnd Bergmann Link: https://lore.kernel.org/r/20200408190314.695067-1-arnd@arndb.de Signed-off-by: Greg Kroah-Hartman drivers/firmware/imx/Kconfig | 4 ++-- 1 file changed, 2 insertions(+), 2 deletions(-) parent commit 8f3d9f354286745c751374f5f1fcafee6b3f3136 wasn't tested testing commit 8f3d9f354286745c751374f5f1fcafee6b3f3136 with gcc (GCC) 8.1.0 kernel signature: 146a21f97e5d9ce9acb12dfc657f3da52d256a66181b7793320d8f97cbf51e02 culprit signature: a7e8363c1c03df83f2409ef7362f9d98a9baed67105bb274648a09d9aecb30c0 parent signature: 146a21f97e5d9ce9acb12dfc657f3da52d256a66181b7793320d8f97cbf51e02 revisions tested: 16, total time: 4h5m23.953980486s (build: 1h38m38.272352628s, test: 2h25m30.456272332s) first bad commit: 32ec783ae19d48084b893cc54747fed37b07eb0c firmware: imx: fix compile-testing cc: ["arnd@arndb.de" "daniel.baluta@nxp.com" "festevam@gmail.com" "gregkh@linuxfoundation.org" "kernel@pengutronix.de" "linux-arm-kernel@lists.infradead.org" "linux-imx@nxp.com" "linux-kernel@vger.kernel.org" "linux@rempel-privat.de" "s.hauer@pengutronix.de" "shawnguo@kernel.org"] crash: INFO: task hung in ctrl_cdev_ioctl INFO: task syz-executor.0:17202 blocked for more than 143 seconds. Not tainted 5.7.0-rc1-syzkaller #0 "echo 0 > /proc/sys/kernel/hung_task_timeout_secs" disables this message. syz-executor.0 D28760 17202 7178 0x00000004 Call Trace: schedule+0xc4/0x2b0 kernel/sched/core.c:4163 schedule_preempt_disabled+0xf/0x20 kernel/sched/core.c:4222 __mutex_lock_common kernel/locking/mutex.c:1033 [inline] __mutex_lock+0x8a0/0x13e0 kernel/locking/mutex.c:1103 ctrl_cdev_ioctl+0x198/0x1e0 drivers/mtd/ubi/cdev.c:1067 vfs_ioctl fs/ioctl.c:47 [inline] ksys_ioctl+0xb8/0x110 fs/ioctl.c:763 __do_sys_ioctl fs/ioctl.c:772 [inline] __se_sys_ioctl fs/ioctl.c:770 [inline] __x64_sys_ioctl+0x6a/0xb0 fs/ioctl.c:770 do_syscall_64+0xc6/0x620 arch/x86/entry/common.c:295 entry_SYSCALL_64_after_hwframe+0x49/0xb3 RIP: 0033:0x45ca29 Code: Bad RIP value. RSP: 002b:00007eff84bb6c78 EFLAGS: 00000246 ORIG_RAX: 0000000000000010 RAX: ffffffffffffffda RBX: 00000000004e1080 RCX: 000000000045ca29 RDX: 000000000076006e RSI: 0000000040046f41 RDI: 0000000000000003 RBP: 000000000078bf00 R08: 0000000000000000 R09: 0000000000000000 R10: 0000000000000000 R11: 0000000000000246 R12: 00000000ffffffff R13: 0000000000000209 R14: 00000000004c44c1 R15: 00007eff84bb76d4 INFO: task syz-executor.2:17212 blocked for more than 143 seconds. Not tainted 5.7.0-rc1-syzkaller #0 "echo 0 > /proc/sys/kernel/hung_task_timeout_secs" disables this message. syz-executor.2 D28760 17212 7174 0x00000004 Call Trace: schedule+0xc4/0x2b0 kernel/sched/core.c:4163 schedule_preempt_disabled+0xf/0x20 kernel/sched/core.c:4222 __mutex_lock_common kernel/locking/mutex.c:1033 [inline] __mutex_lock+0x8a0/0x13e0 kernel/locking/mutex.c:1103 ctrl_cdev_ioctl+0x198/0x1e0 drivers/mtd/ubi/cdev.c:1067 vfs_ioctl fs/ioctl.c:47 [inline] ksys_ioctl+0xb8/0x110 fs/ioctl.c:763 __do_sys_ioctl fs/ioctl.c:772 [inline] __se_sys_ioctl fs/ioctl.c:770 [inline] __x64_sys_ioctl+0x6a/0xb0 fs/ioctl.c:770 do_syscall_64+0xc6/0x620 arch/x86/entry/common.c:295 entry_SYSCALL_64_after_hwframe+0x49/0xb3 RIP: 0033:0x45ca29 Code: Bad RIP value. RSP: 002b:00007faa5f210c78 EFLAGS: 00000246 ORIG_RAX: 0000000000000010 RAX: ffffffffffffffda RBX: 00000000004e1080 RCX: 000000000045ca29 RDX: 000000000076006e RSI: 0000000040046f41 RDI: 0000000000000003 RBP: 000000000078bf00 R08: 0000000000000000 R09: 0000000000000000 R10: 0000000000000000 R11: 0000000000000246 R12: 00000000ffffffff R13: 0000000000000209 R14: 00000000004c44c1 R15: 00007faa5f2116d4 INFO: task syz-executor.4:17214 blocked for more than 143 seconds. Not tainted 5.7.0-rc1-syzkaller #0 "echo 0 > /proc/sys/kernel/hung_task_timeout_secs" disables this message. syz-executor.4 D28760 17214 7180 0x00000004 Call Trace: schedule+0xc4/0x2b0 kernel/sched/core.c:4163 schedule_preempt_disabled+0xf/0x20 kernel/sched/core.c:4222 __mutex_lock_common kernel/locking/mutex.c:1033 [inline] __mutex_lock+0x8a0/0x13e0 kernel/locking/mutex.c:1103 ctrl_cdev_ioctl+0x198/0x1e0 drivers/mtd/ubi/cdev.c:1067 vfs_ioctl fs/ioctl.c:47 [inline] ksys_ioctl+0xb8/0x110 fs/ioctl.c:763 __do_sys_ioctl fs/ioctl.c:772 [inline] __se_sys_ioctl fs/ioctl.c:770 [inline] __x64_sys_ioctl+0x6a/0xb0 fs/ioctl.c:770 do_syscall_64+0xc6/0x620 arch/x86/entry/common.c:295 entry_SYSCALL_64_after_hwframe+0x49/0xb3 RIP: 0033:0x45ca29 Code: Bad RIP value. RSP: 002b:00007f5dd9298c78 EFLAGS: 00000246 ORIG_RAX: 0000000000000010 RAX: ffffffffffffffda RBX: 00000000004e1080 RCX: 000000000045ca29 RDX: 000000000076006e RSI: 0000000040046f41 RDI: 0000000000000003 RBP: 000000000078bf00 R08: 0000000000000000 R09: 0000000000000000 R10: 0000000000000000 R11: 0000000000000246 R12: 00000000ffffffff R13: 0000000000000209 R14: 00000000004c44c1 R15: 00007f5dd92996d4 INFO: task syz-executor.3:17222 blocked for more than 143 seconds. Not tainted 5.7.0-rc1-syzkaller #0 "echo 0 > /proc/sys/kernel/hung_task_timeout_secs" disables this message. syz-executor.3 D28760 17222 7177 0x00004004 Call Trace: schedule+0xc4/0x2b0 kernel/sched/core.c:4163 schedule_timeout+0x467/0x6d0 kernel/time/timer.c:1874 do_wait_for_common kernel/sched/completion.c:85 [inline] __wait_for_common kernel/sched/completion.c:106 [inline] wait_for_common kernel/sched/completion.c:117 [inline] wait_for_completion+0x15e/0x250 kernel/sched/completion.c:138 kthread_stop+0x105/0x590 kernel/kthread.c:572 ubi_detach_mtd_dev+0x1ae/0x3be drivers/mtd/ubi/build.c:1101 ctrl_cdev_ioctl+0x1a1/0x1e0 drivers/mtd/ubi/cdev.c:1068 vfs_ioctl fs/ioctl.c:47 [inline] ksys_ioctl+0xb8/0x110 fs/ioctl.c:763 __do_sys_ioctl fs/ioctl.c:772 [inline] __se_sys_ioctl fs/ioctl.c:770 [inline] __x64_sys_ioctl+0x6a/0xb0 fs/ioctl.c:770 do_syscall_64+0xc6/0x620 arch/x86/entry/common.c:295 entry_SYSCALL_64_after_hwframe+0x49/0xb3 RIP: 0033:0x45ca29 Code: 48 20 0f 94 c0 88 44 24 40 48 8b 6c 24 20 48 83 c4 28 c3 31 c0 eb ee 48 89 34 24 48 89 4c 24 08 48 89 54 24 10 e8 17 5a fa ff <0f> b6 4c 24 18 48 8b 44 24 30 48 8b 5c 24 38 eb bb 31 c9 eb b7 48 RSP: 002b:00007fc729e16c78 EFLAGS: 00000246 ORIG_RAX: 0000000000000010 RAX: ffffffffffffffda RBX: 00000000004e1080 RCX: 000000000045ca29 RDX: 000000000076006e RSI: 0000000040046f41 RDI: 0000000000000003 RBP: 000000000078bf00 R08: 0000000000000000 R09: 0000000000000000 R10: 0000000000000000 R11: 0000000000000246 R12: 00000000ffffffff R13: 0000000000000209 R14: 00000000004c44c1 R15: 00007fc729e176d4 INFO: task syz-executor.3:17224 blocked for more than 144 seconds. Not tainted 5.7.0-rc1-syzkaller #0 "echo 0 > /proc/sys/kernel/hung_task_timeout_secs" disables this message. syz-executor.3 D28760 17224 7177 0x00000004 Call Trace: schedule+0xc4/0x2b0 kernel/sched/core.c:4163 schedule_preempt_disabled+0xf/0x20 kernel/sched/core.c:4222 __mutex_lock_common kernel/locking/mutex.c:1033 [inline] __mutex_lock+0x8a0/0x13e0 kernel/locking/mutex.c:1103 ctrl_cdev_ioctl+0x10f/0x1e0 drivers/mtd/ubi/cdev.c:1042 vfs_ioctl fs/ioctl.c:47 [inline] ksys_ioctl+0xb8/0x110 fs/ioctl.c:763 __do_sys_ioctl fs/ioctl.c:772 [inline] __se_sys_ioctl fs/ioctl.c:770 [inline] __x64_sys_ioctl+0x6a/0xb0 fs/ioctl.c:770 do_syscall_64+0xc6/0x620 arch/x86/entry/common.c:295 entry_SYSCALL_64_after_hwframe+0x49/0xb3 RIP: 0033:0x45ca29 Code: 48 20 0f 94 c0 88 44 24 40 48 8b 6c 24 20 48 83 c4 28 c3 31 c0 eb ee 48 89 34 24 48 89 4c 24 08 48 89 54 24 10 e8 17 5a fa ff <0f> b6 4c 24 18 48 8b 44 24 30 48 8b 5c 24 38 eb bb 31 c9 eb b7 48 RSP: 002b:00007fc729df5c78 EFLAGS: 00000246 ORIG_RAX: 0000000000000010 RAX: ffffffffffffffda RBX: 00000000004e1080 RCX: 000000000045ca29 RDX: 000000000076006e RSI: 0000000040186f40 RDI: 0000000000000004 RBP: 000000000078bfa0 R08: 0000000000000000 R09: 0000000000000000 R10: 0000000000000000 R11: 0000000000000246 R12: 00000000ffffffff R13: 0000000000000209 R14: 00000000004c44c1 R15: 00007fc729df66d4 INFO: task syz-executor.3:17235 blocked for more than 144 seconds. Not tainted 5.7.0-rc1-syzkaller #0 "echo 0 > /proc/sys/kernel/hung_task_timeout_secs" disables this message. syz-executor.3 D28760 17235 7177 0x00000004 Call Trace: schedule+0xc4/0x2b0 kernel/sched/core.c:4163 schedule_preempt_disabled+0xf/0x20 kernel/sched/core.c:4222 __mutex_lock_common kernel/locking/mutex.c:1033 [inline] __mutex_lock+0x8a0/0x13e0 kernel/locking/mutex.c:1103 ctrl_cdev_ioctl+0x198/0x1e0 drivers/mtd/ubi/cdev.c:1067 vfs_ioctl fs/ioctl.c:47 [inline] ksys_ioctl+0xb8/0x110 fs/ioctl.c:763 __do_sys_ioctl fs/ioctl.c:772 [inline] __se_sys_ioctl fs/ioctl.c:770 [inline] __x64_sys_ioctl+0x6a/0xb0 fs/ioctl.c:770 do_syscall_64+0xc6/0x620 arch/x86/entry/common.c:295 entry_SYSCALL_64_after_hwframe+0x49/0xb3 RIP: 0033:0x45ca29 Code: 48 20 0f 94 c0 88 44 24 40 48 8b 6c 24 20 48 83 c4 28 c3 31 c0 eb ee 48 89 34 24 48 89 4c 24 08 48 89 54 24 10 e8 17 5a fa ff <0f> b6 4c 24 18 48 8b 44 24 30 48 8b 5c 24 38 eb bb 31 c9 eb b7 48 RSP: 002b:00007fc729dd4c78 EFLAGS: 00000246 ORIG_RAX: 0000000000000010 RAX: ffffffffffffffda RBX: 00000000004e1080 RCX: 000000000045ca29 RDX: 000000000076006e RSI: 0000000040046f41 RDI: 0000000000000003 RBP: 000000000078c040 R08: 0000000000000000 R09: 0000000000000000 R10: 0000000000000000 R11: 0000000000000246 R12: 00000000ffffffff R13: 0000000000000209 R14: 00000000004c44c1 R15: 00007fc729dd56d4 INFO: task syz-executor.1:17227 blocked for more than 144 seconds. Not tainted 5.7.0-rc1-syzkaller #0 "echo 0 > /proc/sys/kernel/hung_task_timeout_secs" disables this message. syz-executor.1 D28760 17227 7184 0x00004004 Call Trace: schedule+0xc4/0x2b0 kernel/sched/core.c:4163 schedule_preempt_disabled+0xf/0x20 kernel/sched/core.c:4222 __mutex_lock_common kernel/locking/mutex.c:1033 [inline] __mutex_lock+0x8a0/0x13e0 kernel/locking/mutex.c:1103 ctrl_cdev_ioctl+0x198/0x1e0 drivers/mtd/ubi/cdev.c:1067 vfs_ioctl fs/ioctl.c:47 [inline] ksys_ioctl+0xb8/0x110 fs/ioctl.c:763 __do_sys_ioctl fs/ioctl.c:772 [inline] __se_sys_ioctl fs/ioctl.c:770 [inline] __x64_sys_ioctl+0x6a/0xb0 fs/ioctl.c:770 do_syscall_64+0xc6/0x620 arch/x86/entry/common.c:295 entry_SYSCALL_64_after_hwframe+0x49/0xb3 RIP: 0033:0x45ca29 Code: 48 20 0f 94 c0 88 44 24 40 48 8b 6c 24 20 48 83 c4 28 c3 31 c0 eb ee 48 89 34 24 48 89 4c 24 08 48 89 54 24 10 e8 17 5a fa ff <0f> b6 4c 24 18 48 8b 44 24 30 48 8b 5c 24 38 eb bb 31 c9 eb b7 48 RSP: 002b:00007f682f31bc78 EFLAGS: 00000246 ORIG_RAX: 0000000000000010 RAX: ffffffffffffffda RBX: 00000000004e1080 RCX: 000000000045ca29 RDX: 000000000076006e RSI: 0000000040046f41 RDI: 0000000000000003 RBP: 000000000078bf00 R08: 0000000000000000 R09: 0000000000000000 R10: 0000000000000000 R11: 0000000000000246 R12: 00000000ffffffff R13: 0000000000000209 R14: 00000000004c44c1 R15: 00007f682f31c6d4 INFO: task syz-executor.1:17228 blocked for more than 144 seconds. Not tainted 5.7.0-rc1-syzkaller #0 "echo 0 > /proc/sys/kernel/hung_task_timeout_secs" disables this message. syz-executor.1 D28760 17228 7184 0x00000004 Call Trace: schedule+0xc4/0x2b0 kernel/sched/core.c:4163 schedule_preempt_disabled+0xf/0x20 kernel/sched/core.c:4222 __mutex_lock_common kernel/locking/mutex.c:1033 [inline] __mutex_lock+0x8a0/0x13e0 kernel/locking/mutex.c:1103 ctrl_cdev_ioctl+0x10f/0x1e0 drivers/mtd/ubi/cdev.c:1042 vfs_ioctl fs/ioctl.c:47 [inline] ksys_ioctl+0xb8/0x110 fs/ioctl.c:763 __do_sys_ioctl fs/ioctl.c:772 [inline] __se_sys_ioctl fs/ioctl.c:770 [inline] __x64_sys_ioctl+0x6a/0xb0 fs/ioctl.c:770 do_syscall_64+0xc6/0x620 arch/x86/entry/common.c:295 entry_SYSCALL_64_after_hwframe+0x49/0xb3 RIP: 0033:0x45ca29 Code: 48 20 0f 94 c0 88 44 24 40 48 8b 6c 24 20 48 83 c4 28 c3 31 c0 eb ee 48 89 34 24 48 89 4c 24 08 48 89 54 24 10 e8 17 5a fa ff <0f> b6 4c 24 18 48 8b 44 24 30 48 8b 5c 24 38 eb bb 31 c9 eb b7 48 RSP: 002b:00007f682f2fac78 EFLAGS: 00000246 ORIG_RAX: 0000000000000010 RAX: ffffffffffffffda RBX: 00000000004e1080 RCX: 000000000045ca29 RDX: 000000000076006e RSI: 0000000040186f40 RDI: 0000000000000004 RBP: 000000000078bfa0 R08: 0000000000000000 R09: 0000000000000000 R10: 0000000000000000 R11: 0000000000000246 R12: 00000000ffffffff R13: 0000000000000209 R14: 00000000004c44c1 R15: 00007f682f2fb6d4 INFO: task syz-executor.1:17237 blocked for more than 144 seconds. Not tainted 5.7.0-rc1-syzkaller #0 "echo 0 > /proc/sys/kernel/hung_task_timeout_secs" disables this message. syz-executor.1 D28760 17237 7184 0x00004004 Call Trace: schedule+0xc4/0x2b0 kernel/sched/core.c:4163 schedule_preempt_disabled+0xf/0x20 kernel/sched/core.c:4222 __mutex_lock_common kernel/locking/mutex.c:1033 [inline] __mutex_lock+0x8a0/0x13e0 kernel/locking/mutex.c:1103 ctrl_cdev_ioctl+0x198/0x1e0 drivers/mtd/ubi/cdev.c:1067 vfs_ioctl fs/ioctl.c:47 [inline] ksys_ioctl+0xb8/0x110 fs/ioctl.c:763 __do_sys_ioctl fs/ioctl.c:772 [inline] __se_sys_ioctl fs/ioctl.c:770 [inline] __x64_sys_ioctl+0x6a/0xb0 fs/ioctl.c:770 do_syscall_64+0xc6/0x620 arch/x86/entry/common.c:295 entry_SYSCALL_64_after_hwframe+0x49/0xb3 RIP: 0033:0x45ca29 Code: 48 20 0f 94 c0 88 44 24 40 48 8b 6c 24 20 48 83 c4 28 c3 31 c0 eb ee 48 89 34 24 48 89 4c 24 08 48 89 54 24 10 e8 17 5a fa ff <0f> b6 4c 24 18 48 8b 44 24 30 48 8b 5c 24 38 eb bb 31 c9 eb b7 48 RSP: 002b:00007f682f2d9c78 EFLAGS: 00000246 ORIG_RAX: 0000000000000010 RAX: ffffffffffffffda RBX: 00000000004e1080 RCX: 000000000045ca29 RDX: 000000000076006e RSI: 0000000040046f41 RDI: 0000000000000003 RBP: 000000000078c040 R08: 0000000000000000 R09: 0000000000000000 R10: 0000000000000000 R11: 0000000000000246 R12: 00000000ffffffff R13: 0000000000000209 R14: 00000000004c44c1 R15: 00007f682f2da6d4 INFO: task syz-executor.5:17233 blocked for more than 145 seconds. Not tainted 5.7.0-rc1-syzkaller #0 "echo 0 > /proc/sys/kernel/hung_task_timeout_secs" disables this message. syz-executor.5 D28760 17233 7185 0x00000004 Call Trace: schedule+0xc4/0x2b0 kernel/sched/core.c:4163 schedule_preempt_disabled+0xf/0x20 kernel/sched/core.c:4222 __mutex_lock_common kernel/locking/mutex.c:1033 [inline] __mutex_lock+0x8a0/0x13e0 kernel/locking/mutex.c:1103 ctrl_cdev_ioctl+0x198/0x1e0 drivers/mtd/ubi/cdev.c:1067 vfs_ioctl fs/ioctl.c:47 [inline] ksys_ioctl+0xb8/0x110 fs/ioctl.c:763 __do_sys_ioctl fs/ioctl.c:772 [inline] __se_sys_ioctl fs/ioctl.c:770 [inline] __x64_sys_ioctl+0x6a/0xb0 fs/ioctl.c:770 do_syscall_64+0xc6/0x620 arch/x86/entry/common.c:295 entry_SYSCALL_64_after_hwframe+0x49/0xb3 RIP: 0033:0x45ca29 Code: 48 20 0f 94 c0 88 44 24 40 48 8b 6c 24 20 48 83 c4 28 c3 31 c0 eb ee 48 89 34 24 48 89 4c 24 08 48 89 54 24 10 e8 17 5a fa ff <0f> b6 4c 24 18 48 8b 44 24 30 48 8b 5c 24 38 eb bb 31 c9 eb b7 48 RSP: 002b:00007f6cfdef7c78 EFLAGS: 00000246 ORIG_RAX: 0000000000000010 RAX: ffffffffffffffda RBX: 00000000004e1080 RCX: 000000000045ca29 RDX: 000000000076006e RSI: 0000000040046f41 RDI: 0000000000000003 RBP: 000000000078bf00 R08: 0000000000000000 R09: 0000000000000000 R10: 0000000000000000 R11: 0000000000000246 R12: 00000000ffffffff R13: 0000000000000209 R14: 00000000004c44c1 R15: 00007f6cfdef86d4 Showing all locks held in the system: 1 lock held by khungtaskd/1132: #0: ffffffff88db7ac0 (rcu_read_lock){....}-{1:2}, at: debug_show_all_locks+0x52/0x28d kernel/locking/lockdep.c:5754 1 lock held by syz-executor.0/17202: #0: ffffffff8950fbc8 (ubi_devices_mutex){+.+.}-{3:3}, at: ctrl_cdev_ioctl+0x198/0x1e0 drivers/mtd/ubi/cdev.c:1067 1 lock held by syz-executor.2/17212: #0: ffffffff8950fbc8 (ubi_devices_mutex){+.+.}-{3:3}, at: ctrl_cdev_ioctl+0x198/0x1e0 drivers/mtd/ubi/cdev.c:1067 1 lock held by syz-executor.4/17214: #0: ffffffff8950fbc8 (ubi_devices_mutex){+.+.}-{3:3}, at: ctrl_cdev_ioctl+0x198/0x1e0 drivers/mtd/ubi/cdev.c:1067 1 lock held by syz-executor.3/17222: #0: ffffffff8950fbc8 (ubi_devices_mutex){+.+.}-{3:3}, at: ctrl_cdev_ioctl+0x198/0x1e0 drivers/mtd/ubi/cdev.c:1067 1 lock held by syz-executor.3/17224: #0: ffffffff8950fbc8 (ubi_devices_mutex){+.+.}-{3:3}, at: ctrl_cdev_ioctl+0x10f/0x1e0 drivers/mtd/ubi/cdev.c:1042 1 lock held by syz-executor.3/17235: #0: ffffffff8950fbc8 (ubi_devices_mutex){+.+.}-{3:3}, at: ctrl_cdev_ioctl+0x198/0x1e0 drivers/mtd/ubi/cdev.c:1067 1 lock held by syz-executor.1/17227: #0: ffffffff8950fbc8 (ubi_devices_mutex){+.+.}-{3:3}, at: ctrl_cdev_ioctl+0x198/0x1e0 drivers/mtd/ubi/cdev.c:1067 1 lock held by syz-executor.1/17228: #0: ffffffff8950fbc8 (ubi_devices_mutex){+.+.}-{3:3}, at: ctrl_cdev_ioctl+0x10f/0x1e0 drivers/mtd/ubi/cdev.c:1042 1 lock held by syz-executor.1/17237: #0: ffffffff8950fbc8 (ubi_devices_mutex){+.+.}-{3:3}, at: ctrl_cdev_ioctl+0x198/0x1e0 drivers/mtd/ubi/cdev.c:1067 1 lock held by syz-executor.5/17233: #0: ffffffff8950fbc8 (ubi_devices_mutex){+.+.}-{3:3}, at: ctrl_cdev_ioctl+0x198/0x1e0 drivers/mtd/ubi/cdev.c:1067 1 lock held by syz-executor.5/17234: #0: ffffffff8950fbc8 (ubi_devices_mutex){+.+.}-{3:3}, at: ctrl_cdev_ioctl+0x10f/0x1e0 drivers/mtd/ubi/cdev.c:1042 1 lock held by syz-executor.5/17239: #0: ffffffff8950fbc8 (ubi_devices_mutex){+.+.}-{3:3}, at: ctrl_cdev_ioctl+0x198/0x1e0 drivers/mtd/ubi/cdev.c:1067 ============================================= NMI backtrace for cpu 1 CPU: 1 PID: 1132 Comm: khungtaskd Not tainted 5.7.0-rc1-syzkaller #0 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+0x128/0x182 lib/dump_stack.c:118 nmi_cpu_backtrace.cold.7+0x4b/0x83 lib/nmi_backtrace.c:101 nmi_trigger_cpumask_backtrace+0x183/0x1ac lib/nmi_backtrace.c:62 trigger_all_cpu_backtrace include/linux/nmi.h:146 [inline] check_hung_uninterruptible_tasks kernel/hung_task.c:205 [inline] watchdog+0x629/0xc70 kernel/hung_task.c:289 kthread+0x340/0x410 kernel/kthread.c:268 ret_from_fork+0x24/0x30 arch/x86/entry/entry_64.S:352 Sending NMI from CPU 1 to CPUs 0: NMI backtrace for cpu 0 CPU: 0 PID: 0 Comm: swapper/0 Not tainted 5.7.0-rc1-syzkaller #0 Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011 RIP: 0010:memory_is_nonzero mm/kasan/generic.c:108 [inline] RIP: 0010:memory_is_poisoned_n mm/kasan/generic.c:135 [inline] RIP: 0010:memory_is_poisoned mm/kasan/generic.c:166 [inline] RIP: 0010:check_memory_region_inline mm/kasan/generic.c:184 [inline] RIP: 0010:check_memory_region+0x5e/0x1e0 mm/kasan/generic.c:193 Code: 89 f8 49 b9 00 00 00 00 00 fc ff df 4d 89 d3 49 c1 e8 03 49 c1 eb 03 4d 01 cb 4d 01 c1 49 8d 6b 01 4c 89 c8 48 89 eb 4c 29 cb <48> 83 fb 10 7e 75 45 89 c8 41 83 e0 07 0f 85 a5 00 00 00 4c 8d 43 RSP: 0018:ffffc90000007ad0 EFLAGS: 00000002 RAX: fffffbfff16ab93c RBX: 0000000000000001 RCX: ffffffff81505c7e RDX: 0000000000000000 RSI: 0000000000000008 RDI: ffffffff8b55c9e0 RBP: fffffbfff16ab93d R08: 1ffffffff16ab93c R09: fffffbfff16ab93c R10: ffffffff8b55c9e7 R11: fffffbfff16ab93c R12: adeea94cb99a8de4 R13: 0000000000000001 R14: ffffffff89be0a50 R15: ffffffff88c86cf0 FS: 0000000000000000(0000) GS:ffff8880ae800000(0000) knlGS:0000000000000000 CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033 CR2: 00007f1ecc008070 CR3: 000000009acb3000 CR4: 00000000001406f0 DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000 DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400 Call Trace: test_bit include/asm-generic/bitops/instrumented-non-atomic.h:110 [inline] hlock_class+0x4e/0x120 kernel/locking/lockdep.c:179 __lock_acquire+0xcaa/0x3690 kernel/locking/lockdep.c:4352 lock_acquire+0x1e3/0x970 kernel/locking/lockdep.c:4934 __raw_spin_lock_irqsave include/linux/spinlock_api_smp.h:110 [inline] _raw_spin_lock_irqsave+0x95/0xc0 kernel/locking/spinlock.c:159 debug_object_deactivate+0xf3/0x3b0 lib/debugobjects.c:710 debug_timer_deactivate kernel/time/timer.c:719 [inline] debug_deactivate kernel/time/timer.c:768 [inline] detach_timer kernel/time/timer.c:813 [inline] expire_timers kernel/time/timer.c:1439 [inline] __run_timers kernel/time/timer.c:1774 [inline] run_timer_softirq+0x34e/0x1170 kernel/time/timer.c:1787 __do_softirq+0x26e/0xa0c kernel/softirq.c:292 invoke_softirq kernel/softirq.c:373 [inline] irq_exit+0x191/0x1d0 kernel/softirq.c:413 exiting_irq arch/x86/include/asm/apic.h:546 [inline] smp_apic_timer_interrupt+0x1a1/0x5f0 arch/x86/kernel/apic/apic.c:1140 apic_timer_interrupt+0xf/0x20 arch/x86/entry/entry_64.S:829 RIP: 0010:native_safe_halt+0xe/0x10 arch/x86/include/asm/irqflags.h:61 Code: e9 57 ff ff ff 48 89 df e8 1f 51 72 fa e9 e6 fe ff ff 48 89 df e8 12 51 72 fa eb 9c e9 07 00 00 00 0f 00 2d 84 9e 5d 00 fb f4 90 e9 07 00 00 00 0f 00 2d 74 9e 5d 00 f4 c3 cc cc 41 56 41 55 RSP: 0018:ffffffff88c07d90 EFLAGS: 00000282 ORIG_RAX: ffffffffffffff13 RAX: dffffc0000000000 RBX: dffffc0000000000 RCX: 0000000000000000 RDX: 1ffffffff11a8d3f RSI: 0000000000000006 RDI: ffffffff88d469f8 RBP: fffffbfff11a8d3d R08: fffffbfff1190c81 R09: 0000000000000000 R10: 0000000000000000 R11: 0000000000000000 R12: 0000000000000000 R13: 0000000000000000 R14: ffffffff89bdd840 R15: 0000000000000000 arch_safe_halt arch/x86/include/asm/paravirt.h:144 [inline] default_idle+0x4c/0x340 arch/x86/kernel/process.c:697 cpuidle_idle_call kernel/sched/idle.c:154 [inline] do_idle+0x470/0x680 kernel/sched/idle.c:269 cpu_startup_entry+0x14/0x20 kernel/sched/idle.c:361 start_kernel+0x6bc/0x6fa init/main.c:1003 secondary_startup_64+0xa4/0xb0 arch/x86/kernel/head_64.S:242