bisecting cause commit starting from ca562bf79c6548189b74cb5c925218561c0259a1 building syzkaller on 0b33604d8e2793b82ec89abecf82d92b82e3d410 testing commit ca562bf79c6548189b74cb5c925218561c0259a1 compiler: gcc (GCC) 10.2.1 20210217, GNU ld (GNU Binutils for Debian) 2.35.2 kernel signature: f6ef2326756e838e182894d4ceaa42d6901918c52acdcc510ee47102c88dcbaf all runs: crashed: BUG: Dentry still in use in unmount testing release v5.10.99 testing commit fb063a6465f9d17a1bd46a678bc1ffaa84e2f486 compiler: gcc (GCC) 10.2.1 20210217, GNU ld (GNU Binutils for Debian) 2.35.2 kernel signature: db0a6757d699b9af410736b42f9c045c85e1e7983e26d676d86fbc55818ae5df all runs: OK # git bisect start ca562bf79c6548189b74cb5c925218561c0259a1 fb063a6465f9d17a1bd46a678bc1ffaa84e2f486 Bisecting: 2781 revisions left to test after this (roughly 12 steps) [065a448eac5d17d815d2352104a72db24a31671b] FROMGIT: KVM: arm64: Set up .hyp.rodata ELF section testing commit 065a448eac5d17d815d2352104a72db24a31671b compiler: gcc (GCC) 10.2.1 20210217, GNU ld (GNU Binutils for Debian) 2.35.2 kernel signature: 316dee042e00b9a2d913dee7768617e835ab70b49494bdb8e9977afc9043be7a all runs: basic kernel testing failed: KASAN: use-after-free Read in task_active_pid_ns # git bisect skip 065a448eac5d17d815d2352104a72db24a31671b Bisecting: 2779 revisions left to test after this (roughly 12 steps) [9bb0581174c1f2ea1dc466043146d306c3321835] FROMGIT: KVM: arm64: Generate hyp relocation data testing commit 9bb0581174c1f2ea1dc466043146d306c3321835 compiler: gcc (GCC) 10.2.1 20210217, GNU ld (GNU Binutils for Debian) 2.35.2 kernel signature: c081eb4a494434f29d6e43f8b46c465939903cd87d8683168febbe7ca1be23a3 all runs: basic kernel testing failed: KASAN: use-after-free Read in task_active_pid_ns # git bisect skip 9bb0581174c1f2ea1dc466043146d306c3321835 Bisecting: 2779 revisions left to test after this (roughly 12 steps) [cf5b2483a5b9df0f536100e306b9fffe7013ff16] Merge 5.10.13 into android12-5.10 testing commit cf5b2483a5b9df0f536100e306b9fffe7013ff16 compiler: gcc (GCC) 10.2.1 20210217, GNU ld (GNU Binutils for Debian) 2.35.2 kernel signature: f1c5ccf241304253efe8f4bd0831f1544f78cf2b203bfd216fc1532b5e0f99bc all runs: basic kernel testing failed: KASAN: use-after-free Read in task_active_pid_ns # git bisect skip cf5b2483a5b9df0f536100e306b9fffe7013ff16 Bisecting: 2779 revisions left to test after this (roughly 12 steps) [75bd2bca5028f7d129c267a0c861bd0a63f05daa] Revert "fs: remove various compat readv/writev helpers" testing commit 75bd2bca5028f7d129c267a0c861bd0a63f05daa compiler: gcc (GCC) 10.2.1 20210217, GNU ld (GNU Binutils for Debian) 2.35.2 kernel signature: 6600cdaf472c2c60d8ebb26a36b7c04f0ded533e399a0d37a32ef8fee1655c4f all runs: basic kernel testing failed: KASAN: use-after-free Read in task_active_pid_ns # git bisect skip 75bd2bca5028f7d129c267a0c861bd0a63f05daa Bisecting: 2779 revisions left to test after this (roughly 12 steps) [777c1470da498a71f6ab252d124e6e6b2e08070e] FROMGIT: KVM: arm64: Limit the debug architecture to ARMv8.0 testing commit 777c1470da498a71f6ab252d124e6e6b2e08070e compiler: gcc (GCC) 10.2.1 20210217, GNU ld (GNU Binutils for Debian) 2.35.2 kernel signature: b72e9ed64b79ee9797315b6012f13305b1c680c8648c70e84332e002c72599a1 all runs: basic kernel testing failed: KASAN: use-after-free Read in task_active_pid_ns # git bisect skip 777c1470da498a71f6ab252d124e6e6b2e08070e Bisecting: 2779 revisions left to test after this (roughly 12 steps) [c8a1a1d5dffae507d29b56e9b603feea1d5fc258] ANDROID: GKI: Drop CONFIG_POWER_AVS from arm64 gki_defconfig testing commit c8a1a1d5dffae507d29b56e9b603feea1d5fc258 compiler: gcc (GCC) 10.2.1 20210217, GNU ld (GNU Binutils for Debian) 2.35.2 kernel signature: f0cc7bdd036d972811b62ad648c636030d153eec787d1571790abe36ff402ffc all runs: basic kernel testing failed: KASAN: use-after-free Read in task_active_pid_ns # git bisect skip c8a1a1d5dffae507d29b56e9b603feea1d5fc258 Bisecting: 2779 revisions left to test after this (roughly 12 steps) [70f07edcb25bcffa46534492fb2f4598c1a8b9ca] FROMGIT: KVM: arm64: Add symbol at the beginning of each hyp section testing commit 70f07edcb25bcffa46534492fb2f4598c1a8b9ca compiler: gcc (GCC) 10.2.1 20210217, GNU ld (GNU Binutils for Debian) 2.35.2 kernel signature: 9d0ea7df25e2c064105fe3250203b9871d4537ec3bebd62b14472553d821b35b all runs: basic kernel testing failed: KASAN: use-after-free Read in task_active_pid_ns # git bisect skip 70f07edcb25bcffa46534492fb2f4598c1a8b9ca Bisecting: 2779 revisions left to test after this (roughly 12 steps) [c4d042a6431b84610668021d1cb06581e0f7dd4b] ANDROID: arm: allow hooks into ipi testing commit c4d042a6431b84610668021d1cb06581e0f7dd4b compiler: gcc (GCC) 10.2.1 20210217, GNU ld (GNU Binutils for Debian) 2.35.2 kernel signature: 90e62fa27be9e44361f65bd2e3aa13bfaa304c098be0e0bde5a554668d74b6c2 all runs: basic kernel testing failed: KASAN: use-after-free Read in task_active_pid_ns # git bisect skip c4d042a6431b84610668021d1cb06581e0f7dd4b Bisecting: 2779 revisions left to test after this (roughly 12 steps) [3f305a910171e603cdd2cc073acdda85d5028241] Revert half of "ANDROID: gic-v3: Add vendor hook to GIC v3" testing commit 3f305a910171e603cdd2cc073acdda85d5028241 compiler: gcc (GCC) 10.2.1 20210217, GNU ld (GNU Binutils for Debian) 2.35.2 kernel signature: ce182fdc72d7bfc31e91a660b248e7a55f9a619d149d7c4b22df266c3653fa53 all runs: OK # git bisect good 3f305a910171e603cdd2cc073acdda85d5028241 Bisecting: 36 revisions left to test after this (roughly 5 steps) [23686f5ee87076058cb4cc82c5059f4007fc6073] UPSTREAM: f2fs: do not bother checkpoint by f2fs_get_node_info testing commit 23686f5ee87076058cb4cc82c5059f4007fc6073 compiler: gcc (GCC) 10.2.1 20210217, GNU ld (GNU Binutils for Debian) 2.35.2 kernel signature: 950bde78e5c0d2a2d0b93c4c73eafb30fa166c161e5987e86820987ce5eb2565 all runs: crashed: BUG: Dentry still in use in unmount # git bisect bad 23686f5ee87076058cb4cc82c5059f4007fc6073 Bisecting: 17 revisions left to test after this (roughly 4 steps) [d461f54be339c0bc08a39c2606f31655f495897b] ANDROID: Incremental-fs: Doc: correct a sysfs path in incfs.rst testing commit d461f54be339c0bc08a39c2606f31655f495897b compiler: gcc (GCC) 10.2.1 20210217, GNU ld (GNU Binutils for Debian) 2.35.2 kernel signature: 265489b8855ed11d69be9f5f601e479443537fd248a9dc1e18b2886ae22d1094 all runs: crashed: BUG: Dentry still in use in unmount # git bisect bad d461f54be339c0bc08a39c2606f31655f495897b Bisecting: 8 revisions left to test after this (roughly 3 steps) [aee6af70464661072b38742daadf7014b1d6806b] UPSTREAM: coresight: tmc-etr: Add barrier after updating AUX ring buffer testing commit aee6af70464661072b38742daadf7014b1d6806b compiler: gcc (GCC) 10.2.1 20210217, GNU ld (GNU Binutils for Debian) 2.35.2 kernel signature: 93a2648989504e4312d3b22adfb36cecee42d16a6b5755b1d06b309f7c6c41d3 all runs: OK # git bisect good aee6af70464661072b38742daadf7014b1d6806b Bisecting: 4 revisions left to test after this (roughly 2 steps) [dd3256d4392c3753b11237697fd7bffd769ad786] UPSTREAM: coresight: trbe: Defer the probe on offline CPUs testing commit dd3256d4392c3753b11237697fd7bffd769ad786 compiler: gcc (GCC) 10.2.1 20210217, GNU ld (GNU Binutils for Debian) 2.35.2 kernel signature: 481bcd2b9073b186d5d378c28d49cca80e26c45f8e4d518563fb0556421a4999 failed: failed to create VM pool: failed to create GCE image: create image operation failed: &{Code:PERMISSIONS_ERROR Location: Message:Required 'read' permission for 'ci2-android-5-10-bisect-job-bisect-job-image.tar.gz' ForceSendFields:[] NullFields:[]}. # git bisect skip dd3256d4392c3753b11237697fd7bffd769ad786 Bisecting: 4 revisions left to test after this (roughly 2 steps) [e48051244a03ff0a24b3bc0fdd8d06badc8e3292] UPSTREAM: arm64: Add Neoverse-N2, Cortex-A710 CPU part definition testing commit e48051244a03ff0a24b3bc0fdd8d06badc8e3292 compiler: gcc (GCC) 10.2.1 20210217, GNU ld (GNU Binutils for Debian) 2.35.2 kernel signature: 075c597be181eaa1791e804f071e896fab42f595ca468c8f91e6e1140edc1ace all runs: OK # git bisect good e48051244a03ff0a24b3bc0fdd8d06badc8e3292 Bisecting: 1 revision left to test after this (roughly 1 step) [fd4c6594f5ce87eb3f6d53bd73eb14689305fdf1] ANDROID: incremental-fs: fix mount_fs issue testing commit fd4c6594f5ce87eb3f6d53bd73eb14689305fdf1 compiler: gcc (GCC) 10.2.1 20210217, GNU ld (GNU Binutils for Debian) 2.35.2 kernel signature: e57f38a27386d575a87dba292171e7e52c34154e660eb6c3599aa7e5634a9cb8 all runs: crashed: BUG: Dentry still in use in unmount # git bisect bad fd4c6594f5ce87eb3f6d53bd73eb14689305fdf1 Bisecting: 0 revisions left to test after this (roughly 0 steps) [a512242e66cea3de1020d83ca9f2977c0a75530b] BACKPORT: arm64: errata: Add workaround for TSB flush failures testing commit a512242e66cea3de1020d83ca9f2977c0a75530b compiler: gcc (GCC) 10.2.1 20210217, GNU ld (GNU Binutils for Debian) 2.35.2 kernel signature: bd4e5f2122134a8fa28f82b55900367c5a8f64a229856b0b42d8ff33c51b9aa1 all runs: OK # git bisect good a512242e66cea3de1020d83ca9f2977c0a75530b fd4c6594f5ce87eb3f6d53bd73eb14689305fdf1 is the first bad commit commit fd4c6594f5ce87eb3f6d53bd73eb14689305fdf1 Author: Tadeusz Struk Date: Wed Jan 12 13:52:50 2022 -0800 ANDROID: incremental-fs: fix mount_fs issue Syzbot recently found a number of issues related to incremental-fs (see bug numbers below). All have to do with the fact that incr-fs allows mounts of the same source and target multiple times. The correct behavior for a file system is to allow only one such mount, and then every subsequent attempt should fail with a -EBUSY error code. In case of the issues listed below the common pattern is that the reproducer calls: mount("./file0", "./file0", "incremental-fs", 0, NULL) many times and then invokes a file operation like chmod, setxattr, or open on the ./file0. This causes a recursive call for all the mounted instances, which eventually causes a stack overflow and a kernel crash: BUG: stack guard page was hit at ffffc90000c0fff8 kernel stack overflow (double-fault): 0000 [#1] PREEMPT SMP KASAN The reason why many mounts with the same source and target are possible is because the incfs_mount_fs() as it is allocates a new super_block for every call, regardless of whether a given mount already exists or not. This happens every time the sget() function is called with a test param equal to NULL. The correct behavior for an FS mount implementation is to call appropriate mount vfs call for it's type, i.e. mount_bdev() for a block device backed FS, mount_single() for a pseudo file system, like sysfs that is mounted in a single, well know location, or mount_nodev() for other special purpose FS like overlayfs. In case of incremental-fs the open coded mount logic doesn't check for abusive mount attempts such as overlays. To fix this issue the logic needs to be changed to pass a proper test function to sget() call, which then checks if a super_block for a mount instance has already been allocated and also allows the VFS to properly verify invalid mount attempts. Bug: 211066171 Bug: 213140206 Bug: 213215835 Bug: 211914587 Bug: 211213635 Bug: 213137376 Bug: 211161296 Signed-off-by: Tadeusz Struk Change-Id: I66cfc3f1b5aaffb32b0845b2dad3ff26fe952e27 fs/incfs/data_mgmt.c | 1 + fs/incfs/vfs.c | 58 ++++++++++++++++++++++++++++++++++++++-------------- fs/incfs/vfs.h | 1 - 3 files changed, 44 insertions(+), 16 deletions(-) culprit signature: e57f38a27386d575a87dba292171e7e52c34154e660eb6c3599aa7e5634a9cb8 parent signature: bd4e5f2122134a8fa28f82b55900367c5a8f64a229856b0b42d8ff33c51b9aa1 revisions tested: 18, total time: 2h20m30.030279297s (build: 1h24m58.044921808s, test: 53m15.182226865s) first bad commit: fd4c6594f5ce87eb3f6d53bd73eb14689305fdf1 ANDROID: incremental-fs: fix mount_fs issue recipients (to): ["linux-kernel@vger.kernel.org" "tadeusz.struk@linaro.org"] recipients (cc): [] crash: BUG: Dentry still in use in unmount BUG: Dentry ffff88811a795dd0{i=4,n=.incomplete} still in use (1) [unmount of tmpfs tmpfs] ------------[ cut here ]------------ WARNING: CPU: 1 PID: 421 at fs/dcache.c:1616 umount_check fs/dcache.c:1607 [inline] WARNING: CPU: 1 PID: 421 at fs/dcache.c:1616 umount_check.cold+0xce/0x137 fs/dcache.c:1597 Modules linked in: CPU: 1 PID: 421 Comm: syz-executor879 Not tainted 5.10.81-syzkaller #0 Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011 RIP: 0010:umount_check fs/dcache.c:1616 [inline] RIP: 0010:umount_check.cold+0xce/0x137 fs/dcache.c:1597 Code: 48 c1 e0 2a 48 c1 ea 03 80 3c 02 00 75 73 49 8b 54 24 40 41 55 4d 89 f1 41 89 d8 48 89 f1 48 c7 c7 40 31 a9 84 e8 32 16 ff ff <0f> 0b 58 e9 5d e7 93 fd 48 89 75 d8 e8 c8 00 88 fd 48 8b 75 d8 e9 RSP: 0018:ffffc9000059fca8 EFLAGS: 00010286 RAX: 000000000000005a RBX: 0000000000000001 RCX: 0000000000000000 RDX: 0000000000000003 RSI: ffffffff84c02020 RDI: fffff520000b3f88 RBP: ffffc9000059fcd8 R08: 000000000000005a R09: ffff8881f7353067 R10: ffffed103ee6a60c R11: 6e6544203a475542 R12: ffff88810d2947a0 R13: ffff88810c26b3f8 R14: ffffffff84a74520 R15: ffff88811a795e28 FS: 0000555555ea9300(0000) GS:ffff8881f7300000(0000) knlGS:0000000000000000 CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033 CR2: 0000555555eb2628 CR3: 000000010bf7e000 CR4: 00000000003506a0 DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000 DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400 Call Trace: d_walk+0x115/0x3a0 fs/dcache.c:1326 do_one_tree fs/dcache.c:1623 [inline] shrink_dcache_for_umount+0x74/0x300 fs/dcache.c:1639 generic_shutdown_super+0x61/0x330 fs/super.c:447 kill_anon_super fs/super.c:1108 [inline] kill_litter_super+0x63/0x90 fs/super.c:1117 deactivate_locked_super+0x8b/0x130 fs/super.c:335 deactivate_super+0x71/0x80 fs/super.c:366 cleanup_mnt+0x33a/0x4e0 fs/namespace.c:1118 __cleanup_mnt+0xd/0x10 fs/namespace.c:1125 task_work_run+0xc2/0x140 kernel/task_work.c:154 tracehook_notify_resume include/linux/tracehook.h:188 [inline] exit_to_user_mode_loop kernel/entry/common.c:164 [inline] exit_to_user_mode_prepare+0xd9/0xe0 kernel/entry/common.c:191 syscall_exit_to_user_mode+0x27/0x160 kernel/entry/common.c:266 do_syscall_64+0x3f/0x80 arch/x86/entry/common.c:56 entry_SYSCALL_64_after_hwframe+0x44/0xa9 RIP: 0033:0x7fd5aa0100d7 Code: 07 00 48 83 c4 08 5b 5d c3 66 2e 0f 1f 84 00 00 00 00 00 c3 66 2e 0f 1f 84 00 00 00 00 00 0f 1f 44 00 00 b8 a6 00 00 00 0f 05 <48> 3d 01 f0 ff ff 73 01 c3 48 c7 c1 c0 ff ff ff f7 d8 64 89 01 48 RSP: 002b:00007ffc427810b8 EFLAGS: 00000206 ORIG_RAX: 00000000000000a6 RAX: 0000000000000000 RBX: 0000000000000000 RCX: 00007fd5aa0100d7 RDX: 00007ffc42781177 RSI: 000000000000000a RDI: 00007ffc42781170 RBP: 00007ffc42781170 R08: 00000000ffffffff R09: 00007ffc42780f50 R10: 0000555555eaa683 R11: 0000000000000206 R12: 00007ffc427821e0 R13: 0000555555eaa5f0 R14: 00007ffc427810e0 R15: 0000000000000001 ---[ end trace f9009c143491056d ]--- BUG: Dentry ffff88811a793880{i=3,n=.index} still in use (1) [unmount of tmpfs tmpfs] ------------[ cut here ]------------ WARNING: CPU: 1 PID: 421 at fs/dcache.c:1616 umount_check fs/dcache.c:1607 [inline] WARNING: CPU: 1 PID: 421 at fs/dcache.c:1616 umount_check.cold+0xce/0x137 fs/dcache.c:1597 Modules linked in: CPU: 1 PID: 421 Comm: syz-executor879 Tainted: G W 5.10.81-syzkaller #0 Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011 RIP: 0010:umount_check fs/dcache.c:1616 [inline] RIP: 0010:umount_check.cold+0xce/0x137 fs/dcache.c:1597 Code: 48 c1 e0 2a 48 c1 ea 03 80 3c 02 00 75 73 49 8b 54 24 40 41 55 4d 89 f1 41 89 d8 48 89 f1 48 c7 c7 40 31 a9 84 e8 32 16 ff ff <0f> 0b 58 e9 5d e7 93 fd 48 89 75 d8 e8 c8 00 88 fd 48 8b 75 d8 e9 RSP: 0018:ffffc9000059fca8 EFLAGS: 00010286 RAX: 0000000000000055 RBX: 0000000000000001 RCX: 0000000000000000 RDX: 0000000000000003 RSI: ffffffff84c02020 RDI: fffff520000b3f88 RBP: ffffc9000059fcd8 R08: 0000000000000055 R09: ffff8881f7353067 R10: ffffed103ee6a60c R11: 0000000000000001 R12: ffff88810d2959c0 R13: ffff88810c26b3f8 R14: ffffffff84a74520 R15: ffff88811a7938d8 FS: 0000555555ea9300(0000) GS:ffff8881f7300000(0000) knlGS:0000000000000000 CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033 CR2: 0000555555eb2628 CR3: 000000010bf7e000 CR4: 00000000003506a0 DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000 DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400 Call Trace: d_walk+0x115/0x3a0 fs/dcache.c:1326 do_one_tree fs/dcache.c:1623 [inline] shrink_dcache_for_umount+0x74/0x300 fs/dcache.c:1639 generic_shutdown_super+0x61/0x330 fs/super.c:447 kill_anon_super fs/super.c:1108 [inline] kill_litter_super+0x63/0x90 fs/super.c:1117 deactivate_locked_super+0x8b/0x130 fs/super.c:335 deactivate_super+0x71/0x80 fs/super.c:366 cleanup_mnt+0x33a/0x4e0 fs/namespace.c:1118 __cleanup_mnt+0xd/0x10 fs/namespace.c:1125 task_work_run+0xc2/0x140 kernel/task_work.c:154 tracehook_notify_resume include/linux/tracehook.h:188 [inline] exit_to_user_mode_loop kernel/entry/common.c:164 [inline] exit_to_user_mode_prepare+0xd9/0xe0 kernel/entry/common.c:191 syscall_exit_to_user_mode+0x27/0x160 kernel/entry/common.c:266 do_syscall_64+0x3f/0x80 arch/x86/entry/common.c:56 entry_SYSCALL_64_after_hwframe+0x44/0xa9 RIP: 0033:0x7fd5aa0100d7 Code: 07 00 48 83 c4 08 5b 5d c3 66 2e 0f 1f 84 00 00 00 00 00 c3 66 2e 0f 1f 84 00 00 00 00 00 0f 1f 44 00 00 b8 a6 00 00 00 0f 05 <48> 3d 01 f0 ff ff 73 01 c3 48 c7 c1 c0 ff ff ff f7 d8 64 89 01 48 RSP: 002b:00007ffc427810b8 EFLAGS: 00000206 ORIG_RAX: 00000000000000a6 RAX: 0000000000000000 RBX: 0000000000000000 RCX: 00007fd5aa0100d7 RDX: 00007ffc42781177 RSI: 000000000000000a RDI: 00007ffc42781170 RBP: 00007ffc42781170 R08: 00000000ffffffff R09: 00007ffc42780f50 R10: 0000555555eaa683 R11: 0000000000000206 R12: 00007ffc427821e0 R13: 0000555555eaa5f0 R14: 00007ffc427810e0 R15: 0000000000000001 ---[ end trace f9009c143491056e ]--- BUG: Dentry ffff88811a795dd0{i=4,n=.incomplete} still in use (1) [unmount of tmpfs tmpfs] ------------[ cut here ]------------ WARNING: CPU: 1 PID: 421 at fs/dcache.c:1616 umount_check fs/dcache.c:1607 [inline] WARNING: CPU: 1 PID: 421 at fs/dcache.c:1616 umount_check.cold+0xce/0x137 fs/dcache.c:1597 Modules linked in: CPU: 1 PID: 421 Comm: syz-executor879 Tainted: G W 5.10.81-syzkaller #0 Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011 RIP: 0010:umount_check fs/dcache.c:1616 [inline] RIP: 0010:umount_check.cold+0xce/0x137 fs/dcache.c:1597 Code: 48 c1 e0 2a 48 c1 ea 03 80 3c 02 00 75 73 49 8b 54 24 40 41 55 4d 89 f1 41 89 d8 48 89 f1 48 c7 c7 40 31 a9 84 e8 32 16 ff ff <0f> 0b 58 e9 5d e7 93 fd 48 89 75 d8 e8 c8 00 88 fd 48 8b 75 d8 e9 RSP: 0018:ffffc9000059fca8 EFLAGS: 00010286 RAX: 000000000000005a RBX: 0000000000000001 RCX: 0000000000000000 RDX: 0000000000000004 RSI: ffffffff84c02020 RDI: fffff520000b3f88 RBP: ffffc9000059fcd8 R08: 000000000000005a R09: ffff8881f7353067 R10: ffffed103ee6a60c R11: 6e6544203a475542 R12: ffff88810d2947a0 R13: ffff88810c26b3f8 R14: ffffffff84a74520 R15: ffff88811a795e28 FS: 0000555555ea9300(0000) GS:ffff8881f7300000(0000) knlGS:0000000000000000 CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033 CR2: 0000555555eb2628 CR3: 000000010bf7e000 CR4: 00000000003506a0 DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000 DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400 Call Trace: d_walk+0x115/0x3a0 fs/dcache.c:1326 do_one_tree fs/dcache.c:1623 [inline] shrink_dcache_for_umount+0x74/0x300 fs/dcache.c:1639 generic_shutdown_super+0x61/0x330 fs/super.c:447 kill_anon_super fs/super.c:1108 [inline] kill_litter_super+0x63/0x90 fs/super.c:1117 deactivate_locked_super+0x8b/0x130 fs/super.c:335 deactivate_super+0x71/0x80 fs/super.c:366 cleanup_mnt+0x33a/0x4e0 fs/namespace.c:1118 __cleanup_mnt+0xd/0x10 fs/namespace.c:1125 task_work_run+0xc2/0x140 kernel/task_work.c:154 tracehook_notify_resume include/linux/tracehook.h:188 [inline] exit_to_user_mode_loop kernel/entry/common.c:164 [inline] exit_to_user_mode_prepare+0xd9/0xe0 kernel/entry/common.c:191 syscall_exit_to_user_mode+0x27/0x160 kernel/entry/common.c:266 do_syscall_64+0x3f/0x80 arch/x86/entry/common.c:56 entry_SYSCALL_64_after_hwframe+0x44/0xa9 RIP: 0033:0x7fd5aa0100d7 Code: 07 00 48 83 c4 08 5b 5d c3 66 2e 0f 1f 84 00 00 00 00 00 c3 66 2e 0f 1f 84 00 00 00 00 00 0f 1f 44 00 00 b8 a6 00 00 00 0f 05 <48> 3d 01 f0 ff ff 73 01 c3 48 c7 c1 c0 ff ff ff f7 d8 64 89 01 48 RSP: 002b:00007ffc427810b8 EFLAGS: 00000206 ORIG_RAX: 00000000000000a6 RAX: 0000000000000000 RBX: 0000000000000000 RCX: 00007fd5aa0100d7 RDX: 00007ffc42781177 RSI: 000000000000000a RDI: 00007ffc42781170 RBP: 00007ffc42781170 R08: 00000000ffffffff R09: 00007ffc42780f50 R10: 0000555555eaa683 R11: 0000000000000206 R12: 00007ffc427821e0 R13: 0000555555eaa5f0 R14: 00007ffc427810e0 R15: 0000000000000001 ---[ end trace f9009c143491056f ]--- BUG: Dentry ffff88811a793880{i=3,n=.index} still in use (1) [unmount of tmpfs tmpfs] ------------[ cut here ]------------ WARNING: CPU: 1 PID: 421 at fs/dcache.c:1616 umount_check fs/dcache.c:1607 [inline] WARNING: CPU: 1 PID: 421 at fs/dcache.c:1616 umount_check.cold+0xce/0x137 fs/dcache.c:1597 Modules linked in: CPU: 1 PID: 421 Comm: syz-executor879 Tainted: G W 5.10.81-syzkaller #0 Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011 RIP: 0010:umount_check fs/dcache.c:1616 [inline] RIP: 0010:umount_check.cold+0xce/0x137 fs/dcache.c:1597 Code: 48 c1 e0 2a 48 c1 ea 03 80 3c 02 00 75 73 49 8b 54 24 40 41 55 4d 89 f1 41 89 d8 48 89 f1 48 c7 c7 40 31 a9 84 e8 32 16 ff ff <0f> 0b 58 e9 5d e7 93 fd 48 89 75 d8 e8 c8 00 88 fd 48 8b 75 d8 e9 RSP: 0018:ffffc9000059fca8 EFLAGS: 00010286 RAX: 0000000000000055 RBX: 0000000000000001 RCX: 0000000000000000 RDX: 0000000000000004 RSI: 0000000000000004 RDI: fffff520000b3f88 RBP: ffffc9000059fcd8 R08: 0000000000000055 R09: 0000000000000003 R10: fffff520000b3f2e R11: 6e61656c635f5f20 R12: ffff88810d2959c0 R13: ffff88810c26b3f8 R14: ffffffff84a74520 R15: ffff88811a7938d8 FS: 0000555555ea9300(0000) GS:ffff8881f7300000(0000) knlGS:0000000000000000 CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033 CR2: 0000555555eb2628 CR3: 000000010bf7e000 CR4: 00000000003506a0 DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000 DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400 Call Trace: d_walk+0x115/0x3a0 fs/dcache.c:1326 do_one_tree fs/dcache.c:1623 [inline] shrink_dcache_for_umount+0x74/0x300 fs/dcache.c:1639 generic_shutdown_super+0x61/0x330 fs/super.c:447 kill_anon_super fs/super.c:1108 [inline] kill_litter_super+0x63/0x90 fs/super.c:1117 deactivate_locked_super+0x8b/0x130 fs/super.c:335 deactivate_super+0x71/0x80 fs/super.c:366 cleanup_mnt+0x33a/0x4e0 fs/namespace.c:1118 __cleanup_mnt+0xd/0x10 fs/namespace.c:1125 task_work_run+0xc2/0x140 kernel/task_work.c:154 tracehook_notify_resume include/linux/tracehook.h:188 [inline] exit_to_user_mode_loop kernel/entry/common.c:164 [inline] exit_to_user_mode_prepare+0xd9/0xe0 kernel/entry/common.c:191 syscall_exit_to_user_mode+0x27/0x160 kernel/entry/common.c:266 do_syscall_64+0x3f/0x80 arch/x86/entry/common.c:56 entry_SYSCALL_64_after_hwframe+0x44/0xa9 RIP: 0033:0x7fd5aa0100d7 Code: 07 00 48 83 c4 08 5b 5d c3 66 2e 0f 1f 84 00 00 00 00 00 c3 66 2e 0f 1f 84 00 00 00 00 00 0f 1f 44 00 00 b8 a6 00 00 00 0f 05 <48> 3d 01 f0 ff ff 73 01 c3 48 c7 c1 c0 ff ff ff f7 d8 64 89 01 48 RSP: 002b:00007ffc427810b8 EFLAGS: 00000206 ORIG_RAX: 00000000000000a6 RAX: 0000000000000000 RBX: 0000000000000000 RCX: 00007fd5aa0100d7 RDX: 00007ffc42781177 RSI: 000000000000000a RDI: 00007ffc42781170 RBP: 00007ffc42781170 R08: 00000000ffffffff R09: 00007ffc42780f50 R10: 0000555555eaa683 R11: 0000000000000206 R12: 00007ffc427821e0 R13: 0000555555eaa5f0 R14: 00007ffc427810e0 R15: 0000000000000001 ---[ end trace f9009c1434910571 ]--- VFS: Busy inodes after unmount of tmpfs. Self-destruct in 5 seconds. Have a nice day... BUG: Dentry ffff88811a795110{i=4,n=.incomplete} still in use (1) [unmount of tmpfs tmpfs] ------------[ cut here ]------------ WARNING: CPU: 1 PID: 421 at fs/dcache.c:1616 umount_check fs/dcache.c:1607 [inline] WARNING: CPU: 1 PID: 421 at fs/dcache.c:1616 umount_check.cold+0xce/0x137 fs/dcache.c:1597 Modules linked in: CPU: 1 PID: 421 Comm: syz-executor879 Tainted: G W 5.10.81-syzkaller #0 Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011 RIP: 0010:umount_check fs/dcache.c:1616 [inline] RIP: 0010:umount_check.cold+0xce/0x137 fs/dcache.c:1597 Code: 48 c1 e0 2a 48 c1 ea 03 80 3c 02 00 75 73 49 8b 54 24 40 41 55 4d 89 f1 41 89 d8 48 89 f1 48 c7 c7 40 31 a9 84 e8 32 16 ff ff <0f> 0b 58 e9 5d e7 93 fd 48 89 75 d8 e8 c8 00 88 fd 48 8b 75 d8 e9 RSP: 0018:ffffc9000059fca8 EFLAGS: 00010286 RAX: 000000000000005a RBX: 0000000000000001 RCX: 0000000000000000 RDX: 0000000000000003 RSI: 0000000000000004 RDI: fffff520000b3f88 RBP: ffffc9000059fcd8 R08: 000000000000005a R09: 0000000000000003 R10: fffff520000b3f2e R11: 6e6544203a475542 R12: ffff88810d297320 R13: ffff88810b3533f8 R14: ffffffff84a74520 R15: ffff88811a795168 FS: 0000555555ea9300(0000) GS:ffff8881f7300000(0000) knlGS:0000000000000000 CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033 CR2: 0000555555eb2628 CR3: 000000010bf7e000 CR4: 00000000003506a0 DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000 DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400 Call Trace: d_walk+0x115/0x3a0 fs/dcache.c:1326 do_one_tree fs/dcache.c:1623 [inline] shrink_dcache_for_umount+0x74/0x300 fs/dcache.c:1639 generic_shutdown_super+0x61/0x330 fs/super.c:447 kill_anon_super fs/super.c:1108 [inline] kill_litter_super+0x63/0x90 fs/super.c:1117 deactivate_locked_super+0x8b/0x130 fs/super.c:335 deactivate_super+0x71/0x80 fs/super.c:366 cleanup_mnt+0x33a/0x4e0 fs/namespace.c:1118 __cleanup_mnt+0xd/0x10 fs/namespace.c:1125 task_work_run+0xc2/0x140 kernel/task_work.c:154 tracehook_notify_resume include/linux/tracehook.h:188 [inline] exit_to_user_mode_loop kernel/entry/common.c:164 [inline] exit_to_user_mode_prepare+0xd9/0xe0 kernel/entry/common.c:191 syscall_exit_to_user_mode+0x27/0x160 kernel/entry/common.c:266 do_syscall_64+0x3f/0x80 arch/x86/entry/common.c:56 entry_SYSCALL_64_after_hwframe+0x44/0xa9 RIP: 0033:0x7fd5aa0100d7 Code: 07 00 48 83 c4 08 5b 5d c3 66 2e 0f 1f 84 00 00 00 00 00 c3 66 2e 0f 1f 84 00 00 00 00 00 0f 1f 44 00 00 b8 a6 00 00 00 0f 05 <48> 3d 01 f0 ff ff 73 01 c3 48 c7 c1 c0 ff ff ff f7 d8 64 89 01 48 RSP: 002b:00007ffc427810b8 EFLAGS: 00000206 ORIG_RAX: 00000000000000a6 RAX: 0000000000000000 RBX: 0000000000000000 RCX: 00007fd5aa0100d7 RDX: 00007ffc42781177 RSI: 000000000000000a RDI: 00007ffc42781170 RBP: 00007ffc42781170 R08: 00000000ffffffff R09: 00007ffc42780f50 R10: 0000555555eaa683 R11: 0000000000000206 R12: 00007ffc427821e0 R13: 0000555555eaa5f0 R14: 00007ffc427810e0 R15: 0000000000000002 ---[ end trace f9009c143491057f ]--- BUG: Dentry ffff88811a795330{i=3,n=.index} still in use (1) [unmount of tmpfs tmpfs] ------------[ cut here ]------------ WARNING: CPU: 1 PID: 421 at fs/dcache.c:1616 umount_check fs/dcache.c:1607 [inline] WARNING: CPU: 1 PID: 421 at fs/dcache.c:1616 umount_check.cold+0xce/0x137 fs/dcache.c:1597 Modules linked in: CPU: 1 PID: 421 Comm: syz-executor879 Tainted: G W 5.10.81-syzkaller #0 Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011 RIP: 0010:umount_check fs/dcache.c:1616 [inline] RIP: 0010:umount_check.cold+0xce/0x137 fs/dcache.c:1597 Code: 48 c1 e0 2a 48 c1 ea 03 80 3c 02 00 75 73 49 8b 54 24 40 41 55 4d 89 f1 41 89 d8 48 89 f1 48 c7 c7 40 31 a9 84 e8 32 16 ff ff <0f> 0b 58 e9 5d e7 93 fd 48 89 75 d8 e8 c8 00 88 fd 48 8b 75 d8 e9 RSP: 0018:ffffc9000059fca8 EFLAGS: 00010286 RAX: 0000000000000055 RBX: 0000000000000001 RCX: 0000000000000000 RDX: 0000000000000003 RSI: 0000000000000004 RDI: fffff520000b3f88 RBP: ffffc9000059fcd8 R08: 0000000000000055 R09: 0000000000000003 R10: fffff520000b3f2e R11: 3a474e494e524157 R12: ffff88810d295d60 R13: ffff88810b3533f8 R14: ffffffff84a74520 R15: ffff88811a795388 FS: 0000555555ea9300(0000) GS:ffff8881f7300000(0000) knlGS:0000000000000000 CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033 CR2: 0000555555eb2628 CR3: 000000010bf7e000 CR4: 00000000003506a0 DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000 DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400 Call Trace: d_walk+0x115/0x3a0 fs/dcache.c:1326 do_one_tree fs/dcache.c:1623 [inline] shrink_dcache_for_umount+0x74/0x300 fs/dcache.c:1639 generic_shutdown_super+0x61/0x330 fs/super.c:447 kill_anon_super fs/super.c:1108 [inline] kill_litter_super+0x63/0x90 fs/super.c:1117 deactivate_locked_super+0x8b/0x130 fs/super.c:335 deactivate_super+0x71/0x80 fs/super.c:366 cleanup_mnt+0x33a/0x4e0 fs/namespace.c:1118 __cleanup_mnt+0xd/0x10 fs/namespace.c:1125 task_work_run+0xc2/0x140 kernel/task_work.c:154 tracehook_notify_resume include/linux/tracehook.h:188 [inline] exit_to_user_mode_loop kernel/entry/common.c:164 [inline] exit_to_user_mode_prepare+0xd9/0xe0 kernel/entry/common.c:191 syscall_exit_to_user_mode+0x27/0x160 kernel/entry/common.c:266 do_syscall_64+0x3f/0x80 arch/x86/entry/common.c:56 entry_SYSCALL_64_after_hwframe+0x44/0xa9 RIP: 0033:0x7fd5aa0100d7 Code: 07 00 48 83 c4 08 5b 5d c3 66 2e 0f 1f 84 00 00 00 00 00 c3 66 2e 0f 1f 84 00 00 00 00 00 0f 1f 44 00 00 b8 a6 00 00 00 0f 05 <48> 3d 01 f0 ff ff 73 01 c3 48 c7 c1 c0 ff ff ff f7 d8 64 89 01 48 RSP: 002b:00007ffc427810b8 EFLAGS: 00000206 ORIG_RAX: 00000000000000a6 RAX: 0000000000000000 RBX: 0000000000000000 RCX: 00007fd5aa0100d7 RDX: 00007ffc42781177 RSI: 000000000000000a RDI: 00007ffc42781170 RBP: 00007ffc42781170 R08: 00000000ffffffff R09: 00007ffc42780f50 R10: 0000555555eaa683 R11: 0000000000000206 R12: 00007ffc427821e0 R13: 0000555555eaa5f0 R14: 00007ffc427810e0 R15: 0000000000000002 ---[ end trace f9009c1434910581 ]--- BUG: Dentry ffff88811a795110{i=4,n=.incomplete} still in use (1) [unmount of tmpfs tmpfs] ------------[ cut here ]------------ WARNING: CPU: 1 PID: 421 at fs/dcache.c:1616 umount_check fs/dcache.c:1607 [inline] WARNING: CPU: 1 PID: 421 at fs/dcache.c:1616 umount_check.cold+0xce/0x137 fs/dcache.c:1597 Modules linked in: CPU: 1 PID: 421 Comm: syz-executor879 Tainted: G W 5.10.81-syzkaller #0 Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011 RIP: 0010:umount_check fs/dcache.c:1616 [inline] RIP: 0010:umount_check.cold+0xce/0x137 fs/dcache.c:1597 Code: 48 c1 e0 2a 48 c1 ea 03 80 3c 02 00 75 73 49 8b 54 24 40 41 55 4d 89 f1 41 89 d8 48 89 f1 48 c7 c7 40 31 a9 84 e8 32 16 ff ff <0f> 0b 58 e9 5d e7 93 fd 48 89 75 d8 e8 c8 00 88 fd 48 8b 75 d8 e9 RSP: 0018:ffffc9000059fca8 EFLAGS: 00010286 RAX: 000000000000005a RBX: 0000000000000001 RCX: 0000000000000000 RDX: 0000000000000004 RSI: 0000000000000004 RDI: fffff520000b3f88 RBP: ffffc9000059fcd8 R08: 000000000000005a R09: 0000000000000003 R10: fffff520000b3f2e R11: 6e6544203a475542 R12: ffff88810d297320 R13: ffff88810b3533f8 R14: ffffffff84a74520 R15: ffff88811a795168 FS: 0000555555ea9300(0000) GS:ffff8881f7300000(0000) knlGS:0000000000000000 CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033 CR2: 00007fd5aa083290 CR3: 000000010bf7e000 CR4: 00000000003506a0 DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000 DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400 Call Trace: d_walk+0x115/0x3a0 fs/dcache.c:1326 do_one_tree fs/dcache.c:1623 [inline] shrink_dcache_for_umount+0x74/0x300 fs/dcache.c:1639 generic_shutdown_super+0x61/0x330 fs/super.c:447 kill_anon_super fs/super.c:1108 [inline] kill_litter_super+0x63/0x90 fs/super.c:1117 deactivate_locked_super+0x8b/0x130 fs/super.c:335 deactivate_super+0x71/0x80 fs/super.c:366 cleanup_mnt+0x33a/0x4e0 fs/namespace.c:1118 __cleanup_mnt+0xd/0x10 fs/namespace.c:1125 task_work_run+0xc2/0x140 kernel/task_work.c:154 tracehook_notify_resume include/linux/tracehook.h:188 [inline] exit_to_user_mode_loop kernel/entry/common.c:164 [inline] exit_to_user_mode_prepare+0xd9/0xe0 kernel/entry/common.c:191 syscall_exit_to_user_mode+0x27/0x160 kernel/entry/common.c:266 do_syscall_64+0x3f/0x80 arch/x86/entry/common.c:56 entry_SYSCALL_64_after_hwframe+0x44/0xa9 RIP: 0033:0x7fd5aa0100d7 Code: 07 00 48 83 c4 08 5b 5d c3 66 2e 0f 1f 84 00 00 00 00 00 c3 66 2e 0f 1f 84 00 00 00 00 00 0f 1f 44 00 00 b8 a6 00 00 00 0f 05 <48> 3d 01 f0 ff ff 73 01 c3 48 c7 c1 c0 ff ff ff f7 d8 64 89 01 48 RSP: 002b:00007ffc427810b8 EFLAGS: 00000206 ORIG_RAX: 00000000000000a6 RAX: 0000000000000000 RBX: 0000000000000000 RCX: 00007fd5aa0100d7 RDX: 00007ffc42781177 RSI: 000000000000000a RDI: 00007ffc42781170 RBP: 00007ffc42781170 R08: 00000000ffffffff R09: 00007ffc42780f50 R10: 0000555555eaa683 R11: 0000000000000206 R12: 00007ffc427821e0 R13: 0000555555eaa5f0 R14: 00007ffc427810e0 R15: 0000000000000002 ---[ end trace f9009c1434910583 ]--- BUG: Dentry ffff88811a795330{i=3,n=.index} still in use (1) [unmount of tmpfs tmpfs] ------------[ cut here ]------------ WARNING: CPU: 1 PID: 421 at fs/dcache.c:1616 umount_check fs/dcache.c:1607 [inline] WARNING: CPU: 1 PID: 421 at fs/dcache.c:1616 umount_check.cold+0xce/0x137 fs/dcache.c:1597 Modules linked in: CPU: 1 PID: 421 Comm: syz-executor879 Tainted: G W 5.10.81-syzkaller #0 Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011 RIP: 0010:umount_check fs/dcache.c:1616 [inline] RIP: 0010:umount_check.cold+0xce/0x137 fs/dcache.c:1597 Code: 48 c1 e0 2a 48 c1 ea 03 80 3c 02 00 75 73 49 8b 54 24 40 41 55 4d 89 f1 41 89 d8 48 89 f1 48 c7 c7 40 31 a9 84 e8 32 16 ff ff <0f> 0b 58 e9 5d e7 93 fd 48 89 75 d8 e8 c8 00 88 fd 48 8b 75 d8 e9 RSP: 0018:ffffc9000059fca8 EFLAGS: 00010286 RAX: 0000000000000055 RBX: 0000000000000001 RCX: 0000000000000000 RDX: 0000000000000004 RSI: 0000000000000008 RDI: fffff520000b3f88 RBP: ffffc9000059fcd8 R08: 0000000000000055 R09: ffffc9000059f8cf R10: fffff520000b3f19 R11: 0000000000000001 R12: ffff88810d295d60 R13: ffff88810b3533f8 R14: ffffffff84a74520 R15: ffff88811a795388 FS: 0000555555ea9300(0000) GS:ffff8881f7300000(0000) knlGS:0000000000000000 CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033 CR2: 00007fd5aa083290 CR3: 000000010bf7e000 CR4: 00000000003506a0 DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000 DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400 Call Trace: d_walk+0x115/0x3a0 fs/dcache.c:1326 do_one_tree fs/dcache.c:1623 [inline] shrink_dcache_for_umount+0x74/0x300 fs/dcache.c:1639 generic_shutdown_super+0x61/0x330 fs/super.c:447 kill_anon_super fs/super.c:1108 [inline] kill_litter_super+0x63/0x90 fs/super.c:1117 deactivate_locked_super+0x8b/0x130 fs/super.c:335 deactivate_super+0x71/0x80 fs/super.c:366 cleanup_mnt+0x33a/0x4e0 fs/namespace.c:1118 __cleanup_mnt+0xd/0x10 fs/namespace.c:1125 task_work_run+0xc2/0x140 kernel/task_work.c:154 tracehook_notify_resume include/linux/tracehook.h:188 [inline] exit_to_user_mode_loop kernel/entry/common.c:164 [inline] exit_to_user_mode_prepare+0xd9/0xe0 kernel/entry/common.c:191 syscall_exit_to_user_mode+0x27/0x160 kernel/entry/common.c:266 do_syscall_64+0x3f/0x80 arch/x86/entry/common.c:56 entry_SYSCALL_64_after_hwframe+0x44/0xa9 RIP: 0033:0x7fd5aa0100d7 Code: 07 00 48 83 c4 08 5b 5d c3 66 2e 0f 1f 84 00 00 00 00 00 c3 66 2e 0f 1f 84 00 00 00 00 00 0f 1f 44 00 00 b8 a6 00 00 00 0f 05 <48> 3d 01 f0 ff ff 73 01 c3 48 c7 c1 c0 ff ff ff f7 d8 64 89 01 48 RSP: 002b:00007ffc427810b8 EFLAGS: 00000206 ORIG_RAX: 00000000000000a6 RAX: 0000000000000000 RBX: 0000000000000000 RCX: 00007fd5aa0100d7 RDX: 00007ffc42781177 RSI: 000000000000000a RDI: 00007ffc42781170 RBP: 00007ffc42781170 R08: 00000000ffffffff R09: 00007ffc42780f50 R10: 0000555555eaa683 R11: 0000000000000206 R12: 00007ffc427821e0 R13: 0000555555eaa5f0 R14: 00007ffc427810e0 R15: 0000000000000002 ---[ end trace f9009c1434910584 ]--- VFS: Busy inodes after unmount of tmpfs. Self-destruct in 5 seconds. Have a nice day...