Extracting prog: 5m16.447365495s Minimizing prog: 37m25.578399073s Simplifying prog options: 12m12.473275866s Extracting C: 5m12.576135889s Simplifying C: 0s extracting reproducer from 1 programs testing a last program of every proc single: executing 1 programs separately with timeout 30s testing program (duration=30s, {Threaded:true Repeat:true RepeatTimes:0 Procs:4 Slowdown:1 Sandbox:none SandboxArg:0 Leak:false NetInjection:true NetDevices:true NetReset:true Cgroups:true BinfmtMisc:true CloseFDs:true KCSAN:false DevlinkPCI:false NicVF:false USB:true VhciInjection:true Wifi:true IEEE802154:true Sysctl:true Swap:true UseTmpDir:true HandleSegv:true Trace:false CallComments:true LegacyOptions:{Collide:false Fault:false FaultCall:0 FaultNth:0}}): open_tree-fchdir-close-open_tree detailed listing: executing program 0: r0 = open_tree(0xffffffffffffff9c, &(0x7f0000000100)='\x00', 0x89901) fchdir(r0) close(r0) open_tree(0xffffffffffffff9c, &(0x7f0000000100)='\x00', 0x81902) program did not crash single: failed to extract reproducer single: executing 1 programs separately with timeout 1m40s testing program (duration=1m40s, {Threaded:true Repeat:true RepeatTimes:0 Procs:4 Slowdown:1 Sandbox:none SandboxArg:0 Leak:false NetInjection:true NetDevices:true NetReset:true Cgroups:true BinfmtMisc:true CloseFDs:true KCSAN:false DevlinkPCI:false NicVF:false USB:true VhciInjection:true Wifi:true IEEE802154:true Sysctl:true Swap:true UseTmpDir:true HandleSegv:true Trace:false CallComments:true LegacyOptions:{Collide:false Fault:false FaultCall:0 FaultNth:0}}): open_tree-fchdir-close-open_tree detailed listing: executing program 0: r0 = open_tree(0xffffffffffffff9c, &(0x7f0000000100)='\x00', 0x89901) fchdir(r0) close(r0) open_tree(0xffffffffffffff9c, &(0x7f0000000100)='\x00', 0x81902) program did not crash single: failed to extract reproducer single: executing 1 programs separately with timeout 6m0s testing program (duration=6m0s, {Threaded:true Repeat:true RepeatTimes:0 Procs:4 Slowdown:1 Sandbox:none SandboxArg:0 Leak:false NetInjection:true NetDevices:true NetReset:true Cgroups:true BinfmtMisc:true CloseFDs:true KCSAN:false DevlinkPCI:false NicVF:false USB:true VhciInjection:true Wifi:true IEEE802154:true Sysctl:true Swap:true UseTmpDir:true HandleSegv:true Trace:false CallComments:true LegacyOptions:{Collide:false Fault:false FaultCall:0 FaultNth:0}}): open_tree-fchdir-close-open_tree detailed listing: executing program 0: r0 = open_tree(0xffffffffffffff9c, &(0x7f0000000100)='\x00', 0x89901) fchdir(r0) close(r0) open_tree(0xffffffffffffff9c, &(0x7f0000000100)='\x00', 0x81902) program crashed: general protection fault in __umount_mnt single: successfully extracted reproducer found reproducer with 4 syscalls minimizing guilty program testing program (duration=6m0s, {Threaded:true Repeat:true RepeatTimes:0 Procs:4 Slowdown:1 Sandbox:none SandboxArg:0 Leak:false NetInjection:true NetDevices:true NetReset:true Cgroups:true BinfmtMisc:true CloseFDs:true KCSAN:false DevlinkPCI:false NicVF:false USB:true VhciInjection:true Wifi:true IEEE802154:true Sysctl:true Swap:true UseTmpDir:true HandleSegv:true Trace:false CallComments:true LegacyOptions:{Collide:false Fault:false FaultCall:0 FaultNth:0}}): open_tree-fchdir-close detailed listing: executing program 0: r0 = open_tree(0xffffffffffffff9c, &(0x7f0000000100)='\x00', 0x89901) fchdir(r0) close(r0) program did not crash testing program (duration=6m0s, {Threaded:true Repeat:true RepeatTimes:0 Procs:4 Slowdown:1 Sandbox:none SandboxArg:0 Leak:false NetInjection:true NetDevices:true NetReset:true Cgroups:true BinfmtMisc:true CloseFDs:true KCSAN:false DevlinkPCI:false NicVF:false USB:true VhciInjection:true Wifi:true IEEE802154:true Sysctl:true Swap:true UseTmpDir:true HandleSegv:true Trace:false CallComments:true LegacyOptions:{Collide:false Fault:false FaultCall:0 FaultNth:0}}): open_tree-fchdir-open_tree detailed listing: executing program 0: r0 = open_tree(0xffffffffffffff9c, &(0x7f0000000100)='\x00', 0x89901) fchdir(r0) open_tree(0xffffffffffffff9c, &(0x7f0000000100)='\x00', 0x81902) program did not crash testing program (duration=6m0s, {Threaded:true Repeat:true RepeatTimes:0 Procs:4 Slowdown:1 Sandbox:none SandboxArg:0 Leak:false NetInjection:true NetDevices:true NetReset:true Cgroups:true BinfmtMisc:true CloseFDs:true KCSAN:false DevlinkPCI:false NicVF:false USB:true VhciInjection:true Wifi:true IEEE802154:true Sysctl:true Swap:true UseTmpDir:true HandleSegv:true Trace:false CallComments:true LegacyOptions:{Collide:false Fault:false FaultCall:0 FaultNth:0}}): open_tree-close-open_tree detailed listing: executing program 0: r0 = open_tree(0xffffffffffffff9c, &(0x7f0000000100)='\x00', 0x89901) close(r0) open_tree(0xffffffffffffff9c, &(0x7f0000000100)='\x00', 0x81902) program did not crash testing program (duration=6m0s, {Threaded:true Repeat:true RepeatTimes:0 Procs:4 Slowdown:1 Sandbox:none SandboxArg:0 Leak:false NetInjection:true NetDevices:true NetReset:true Cgroups:true BinfmtMisc:true CloseFDs:true KCSAN:false DevlinkPCI:false NicVF:false USB:true VhciInjection:true Wifi:true IEEE802154:true Sysctl:true Swap:true UseTmpDir:true HandleSegv:true Trace:false CallComments:true LegacyOptions:{Collide:false Fault:false FaultCall:0 FaultNth:0}}): fchdir-close-open_tree detailed listing: executing program 0: fchdir(0xffffffffffffffff) close(0xffffffffffffffff) open_tree(0xffffffffffffff9c, &(0x7f0000000100)='\x00', 0x81902) program did not crash testing program (duration=6m0s, {Threaded:true Repeat:true RepeatTimes:0 Procs:4 Slowdown:1 Sandbox:none SandboxArg:0 Leak:false NetInjection:true NetDevices:true NetReset:true Cgroups:true BinfmtMisc:true CloseFDs:true KCSAN:false DevlinkPCI:false NicVF:false USB:true VhciInjection:true Wifi:true IEEE802154:true Sysctl:true Swap:true UseTmpDir:true HandleSegv:true Trace:false CallComments:true LegacyOptions:{Collide:false Fault:false FaultCall:0 FaultNth:0}}): open_tree-fchdir-close-open_tree detailed listing: executing program 0: r0 = open_tree(0xffffffffffffff9c, 0x0, 0x89901) fchdir(r0) close(r0) open_tree(0xffffffffffffff9c, &(0x7f0000000100)='\x00', 0x81902) program did not crash testing program (duration=6m0s, {Threaded:true Repeat:true RepeatTimes:0 Procs:4 Slowdown:1 Sandbox:none SandboxArg:0 Leak:false NetInjection:true NetDevices:true NetReset:true Cgroups:true BinfmtMisc:true CloseFDs:true KCSAN:false DevlinkPCI:false NicVF:false USB:true VhciInjection:true Wifi:true IEEE802154:true Sysctl:true Swap:true UseTmpDir:true HandleSegv:true Trace:false CallComments:true LegacyOptions:{Collide:false Fault:false FaultCall:0 FaultNth:0}}): open_tree-fchdir-close-open_tree detailed listing: executing program 0: r0 = open_tree(0xffffffffffffff9c, &(0x7f0000000100)='\x00', 0x89901) fchdir(r0) close(r0) open_tree(0xffffffffffffff9c, 0x0, 0x81902) program did not crash extracting C reproducer testing compiled C program (duration=6m0s, {Threaded:true Repeat:true RepeatTimes:0 Procs:4 Slowdown:1 Sandbox:none SandboxArg:0 Leak:false NetInjection:true NetDevices:true NetReset:true Cgroups:true BinfmtMisc:true CloseFDs:true KCSAN:false DevlinkPCI:false NicVF:false USB:true VhciInjection:true Wifi:true IEEE802154:true Sysctl:true Swap:true UseTmpDir:true HandleSegv:true Trace:false CallComments:true LegacyOptions:{Collide:false Fault:false FaultCall:0 FaultNth:0}}): open_tree-fchdir-close-open_tree program crashed: no output from test machine a never seen crash title: no output from test machine, ignore simplifying guilty program options testing program (duration=6m0s, {Threaded:false Repeat:true RepeatTimes:0 Procs:4 Slowdown:1 Sandbox:none SandboxArg:0 Leak:false NetInjection:true NetDevices:true NetReset:true Cgroups:true BinfmtMisc:true CloseFDs:true KCSAN:false DevlinkPCI:false NicVF:false USB:true VhciInjection:true Wifi:true IEEE802154:true Sysctl:true Swap:true UseTmpDir:true HandleSegv:true Trace:false CallComments:true LegacyOptions:{Collide:false Fault:false FaultCall:0 FaultNth:0}}): open_tree-fchdir-close-open_tree detailed listing: executing program 0: r0 = open_tree(0xffffffffffffff9c, &(0x7f0000000100)='\x00', 0x89901) fchdir(r0) close(r0) open_tree(0xffffffffffffff9c, &(0x7f0000000100)='\x00', 0x81902) program did not crash testing program (duration=6m0s, {Threaded:true Repeat:true RepeatTimes:0 Procs:1 Slowdown:1 Sandbox:none SandboxArg:0 Leak:false NetInjection:true NetDevices:true NetReset:true Cgroups:true BinfmtMisc:true CloseFDs:true KCSAN:false DevlinkPCI:false NicVF:false USB:true VhciInjection:true Wifi:true IEEE802154:true Sysctl:true Swap:true UseTmpDir:true HandleSegv:true Trace:false CallComments:true LegacyOptions:{Collide:false Fault:false FaultCall:0 FaultNth:0}}): open_tree-fchdir-close-open_tree detailed listing: executing program 0: r0 = open_tree(0xffffffffffffff9c, &(0x7f0000000100)='\x00', 0x89901) fchdir(r0) close(r0) open_tree(0xffffffffffffff9c, &(0x7f0000000100)='\x00', 0x81902) program did not crash testing program (duration=6m0s, {Threaded:true Repeat:true RepeatTimes:0 Procs:4 Slowdown:1 Sandbox:none SandboxArg:0 Leak:false NetInjection:true NetDevices:true NetReset:true Cgroups:true BinfmtMisc:true CloseFDs:true KCSAN:false DevlinkPCI:false NicVF:false USB:true VhciInjection:true Wifi:true IEEE802154:true Sysctl:true Swap:true UseTmpDir:true HandleSegv:true Trace:false CallComments:true LegacyOptions:{Collide:false Fault:false FaultCall:0 FaultNth:0}}): open_tree-fchdir-close-open_tree detailed listing: executing program 0: r0 = open_tree(0xffffffffffffff9c, &(0x7f0000000100)='\x00', 0x89901) fchdir(r0) close(r0) open_tree(0xffffffffffffff9c, &(0x7f0000000100)='\x00', 0x81902) program crashed: general protection fault in __umount_mnt validation run: crashed=true testing program (duration=6m0s, {Threaded:true Repeat:true RepeatTimes:0 Procs:4 Slowdown:1 Sandbox:none SandboxArg:0 Leak:false NetInjection:true NetDevices:true NetReset:true Cgroups:true BinfmtMisc:true CloseFDs:true KCSAN:false DevlinkPCI:false NicVF:false USB:true VhciInjection:true Wifi:true IEEE802154:true Sysctl:true Swap:true UseTmpDir:true HandleSegv:true Trace:false CallComments:true LegacyOptions:{Collide:false Fault:false FaultCall:0 FaultNth:0}}): open_tree-fchdir-close-open_tree detailed listing: executing program 0: r0 = open_tree(0xffffffffffffff9c, &(0x7f0000000100)='\x00', 0x89901) fchdir(r0) close(r0) open_tree(0xffffffffffffff9c, &(0x7f0000000100)='\x00', 0x81902) program crashed: lost connection to test machine suppressed program crash: lost connection to test machine validation run: crashed=false testing program (duration=6m0s, {Threaded:true Repeat:true RepeatTimes:0 Procs:4 Slowdown:1 Sandbox:none SandboxArg:0 Leak:false NetInjection:true NetDevices:true NetReset:true Cgroups:true BinfmtMisc:true CloseFDs:true KCSAN:false DevlinkPCI:false NicVF:false USB:true VhciInjection:true Wifi:true IEEE802154:true Sysctl:true Swap:true UseTmpDir:true HandleSegv:true Trace:false CallComments:true LegacyOptions:{Collide:false Fault:false FaultCall:0 FaultNth:0}}): open_tree-fchdir-close-open_tree detailed listing: executing program 0: r0 = open_tree(0xffffffffffffff9c, &(0x7f0000000100)='\x00', 0x89901) fchdir(r0) close(r0) open_tree(0xffffffffffffff9c, &(0x7f0000000100)='\x00', 0x81902) program crashed: general protection fault in __umount_mnt validation run: crashed=true testing program (duration=6m0s, {Threaded:true Repeat:true RepeatTimes:0 Procs:4 Slowdown:1 Sandbox:none SandboxArg:0 Leak:false NetInjection:true NetDevices:true NetReset:true Cgroups:true BinfmtMisc:true CloseFDs:true KCSAN:false DevlinkPCI:false NicVF:false USB:true VhciInjection:true Wifi:true IEEE802154:true Sysctl:true Swap:true UseTmpDir:true HandleSegv:true Trace:false CallComments:true LegacyOptions:{Collide:false Fault:false FaultCall:0 FaultNth:0}}): open_tree-fchdir-close-open_tree detailed listing: executing program 0: r0 = open_tree(0xffffffffffffff9c, &(0x7f0000000100)='\x00', 0x89901) fchdir(r0) close(r0) open_tree(0xffffffffffffff9c, &(0x7f0000000100)='\x00', 0x81902) program crashed: general protection fault in __umount_mnt validation run: crashed=true reproducing took 1h14m53.576732683s repro crashed as (corrupted=false): Oops: general protection fault, probably for non-canonical address 0xfbd59c0000000024: 0000 [#1] SMP KASAN PTI KASAN: maybe wild-memory-access in range [0xdead000000000120-0xdead000000000127] CPU: 0 UID: 0 PID: 27177 Comm: syz.3.10053 Not tainted syzkaller #0 PREEMPT(full) Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 02/12/2026 RIP: 0010:__hlist_del include/linux/list.h:992 [inline] RIP: 0010:hlist_del_init include/linux/list.h:1020 [inline] RIP: 0010:__umount_mnt+0x24e/0x490 fs/namespace.c:997 Code: 85 e4 74 61 4d 8d be f8 00 00 00 4c 89 f8 48 c1 e8 03 80 3c 28 00 74 08 4c 89 ff e8 fc 3f e3 ff 4d 8b 2f 4c 89 e0 48 c1 e8 03 <80> 3c 28 00 74 08 4c 89 e7 e8 d4 40 e3 ff 4d 89 2c 24 4d 85 ed 74 RSP: 0018:ffffc900067efa20 EFLAGS: 00010a06 RAX: 1bd5a00000000024 RBX: ffff88806f3af6c8 RCX: ffff88802b448000 RDX: 0000000000000000 RSI: ffffffff8ead7f20 RDI: ffff88806f3af738 RBP: dffffc0000000000 R08: ffffffff903447f7 R09: 1ffffffff20688fe R10: dffffc0000000000 R11: fffffbfff20688ff R12: dead000000000122 R13: dead000000000100 R14: ffff88806f3af6c0 R15: ffff88806f3af7b8 FS: 000055557d4c4500(0000) GS:ffff8881251f3000(0000) knlGS:0000000000000000 CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033 CR2: 00007f56367acff8 CR3: 00000000771dc000 CR4: 00000000003526f0 Call Trace: umount_mnt fs/namespace.c:1008 [inline] umount_tree+0x925/0xd90 fs/namespace.c:1819 put_mnt_ns+0x1d6/0x2f0 fs/namespace.c:6264 evict+0x61e/0xb10 fs/inode.c:846 __dentry_kill+0x1a2/0x5e0 fs/dcache.c:670 finish_dput+0xc9/0x480 fs/dcache.c:879 __fput+0x691/0xa70 fs/file_table.c:477 task_work_run+0x1d9/0x270 kernel/task_work.c:233 resume_user_mode_work include/linux/resume_user_mode.h:50 [inline] __exit_to_user_mode_loop kernel/entry/common.c:67 [inline] exit_to_user_mode_loop+0xed/0x480 kernel/entry/common.c:98 __exit_to_user_mode_prepare include/linux/irq-entry-common.h:238 [inline] syscall_exit_to_user_mode_prepare include/linux/irq-entry-common.h:269 [inline] syscall_exit_to_user_mode include/linux/entry-common.h:328 [inline] do_syscall_64+0x33e/0xf80 arch/x86/entry/syscall_64.c:100 entry_SYSCALL_64_after_hwframe+0x77/0x7f RIP: 0033:0x7f563599c799 Code: ff c3 66 2e 0f 1f 84 00 00 00 00 00 0f 1f 44 00 00 48 89 f8 48 89 f7 48 89 d6 48 89 ca 4d 89 c2 4d 89 c8 4c 8b 4c 24 08 0f 05 <48> 3d 01 f0 ff ff 73 01 c3 48 c7 c1 e8 ff ff ff f7 d8 64 89 01 48 RSP: 002b:00007ffe43c20ba8 EFLAGS: 00000246 ORIG_RAX: 00000000000001b4 RAX: 0000000000000000 RBX: 00007ffe43c20c90 RCX: 00007f563599c799 RDX: 0000000000000000 RSI: 000000000000001e RDI: 0000000000000003 RBP: 00000000000579b1 R08: 0000000000000001 R09: 0000000000000000 R10: 0000001b33a20000 R11: 0000000000000246 R12: 00007ffe43c20cd0 R13: 00007f5635c1609c R14: 0000000000057a24 R15: 00007f5635c16090 Modules linked in: ---[ end trace 0000000000000000 ]--- RIP: 0010:__hlist_del include/linux/list.h:992 [inline] RIP: 0010:hlist_del_init include/linux/list.h:1020 [inline] RIP: 0010:__umount_mnt+0x24e/0x490 fs/namespace.c:997 Code: 85 e4 74 61 4d 8d be f8 00 00 00 4c 89 f8 48 c1 e8 03 80 3c 28 00 74 08 4c 89 ff e8 fc 3f e3 ff 4d 8b 2f 4c 89 e0 48 c1 e8 03 <80> 3c 28 00 74 08 4c 89 e7 e8 d4 40 e3 ff 4d 89 2c 24 4d 85 ed 74 RSP: 0018:ffffc900067efa20 EFLAGS: 00010a06 RAX: 1bd5a00000000024 RBX: ffff88806f3af6c8 RCX: ffff88802b448000 RDX: 0000000000000000 RSI: ffffffff8ead7f20 RDI: ffff88806f3af738 RBP: dffffc0000000000 R08: ffffffff903447f7 R09: 1ffffffff20688fe R10: dffffc0000000000 R11: fffffbfff20688ff R12: dead000000000122 R13: dead000000000100 R14: ffff88806f3af6c0 R15: ffff88806f3af7b8 FS: 000055557d4c4500(0000) GS:ffff8881251f3000(0000) knlGS:0000000000000000 CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033 CR2: 00007f56367acff8 CR3: 00000000771dc000 CR4: 00000000003526f0 ---------------- Code disassembly (best guess): 0: 85 e4 test %esp,%esp 2: 74 61 je 0x65 4: 4d 8d be f8 00 00 00 lea 0xf8(%r14),%r15 b: 4c 89 f8 mov %r15,%rax e: 48 c1 e8 03 shr $0x3,%rax 12: 80 3c 28 00 cmpb $0x0,(%rax,%rbp,1) 16: 74 08 je 0x20 18: 4c 89 ff mov %r15,%rdi 1b: e8 fc 3f e3 ff call 0xffe3401c 20: 4d 8b 2f mov (%r15),%r13 23: 4c 89 e0 mov %r12,%rax 26: 48 c1 e8 03 shr $0x3,%rax * 2a: 80 3c 28 00 cmpb $0x0,(%rax,%rbp,1) <-- trapping instruction 2e: 74 08 je 0x38 30: 4c 89 e7 mov %r12,%rdi 33: e8 d4 40 e3 ff call 0xffe3410c 38: 4d 89 2c 24 mov %r13,(%r12) 3c: 4d 85 ed test %r13,%r13 3f: 74 .byte 0x74 final repro crashed as (corrupted=false): Oops: general protection fault, probably for non-canonical address 0xfbd59c0000000024: 0000 [#1] SMP KASAN PTI KASAN: maybe wild-memory-access in range [0xdead000000000120-0xdead000000000127] CPU: 0 UID: 0 PID: 27177 Comm: syz.3.10053 Not tainted syzkaller #0 PREEMPT(full) Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 02/12/2026 RIP: 0010:__hlist_del include/linux/list.h:992 [inline] RIP: 0010:hlist_del_init include/linux/list.h:1020 [inline] RIP: 0010:__umount_mnt+0x24e/0x490 fs/namespace.c:997 Code: 85 e4 74 61 4d 8d be f8 00 00 00 4c 89 f8 48 c1 e8 03 80 3c 28 00 74 08 4c 89 ff e8 fc 3f e3 ff 4d 8b 2f 4c 89 e0 48 c1 e8 03 <80> 3c 28 00 74 08 4c 89 e7 e8 d4 40 e3 ff 4d 89 2c 24 4d 85 ed 74 RSP: 0018:ffffc900067efa20 EFLAGS: 00010a06 RAX: 1bd5a00000000024 RBX: ffff88806f3af6c8 RCX: ffff88802b448000 RDX: 0000000000000000 RSI: ffffffff8ead7f20 RDI: ffff88806f3af738 RBP: dffffc0000000000 R08: ffffffff903447f7 R09: 1ffffffff20688fe R10: dffffc0000000000 R11: fffffbfff20688ff R12: dead000000000122 R13: dead000000000100 R14: ffff88806f3af6c0 R15: ffff88806f3af7b8 FS: 000055557d4c4500(0000) GS:ffff8881251f3000(0000) knlGS:0000000000000000 CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033 CR2: 00007f56367acff8 CR3: 00000000771dc000 CR4: 00000000003526f0 Call Trace: umount_mnt fs/namespace.c:1008 [inline] umount_tree+0x925/0xd90 fs/namespace.c:1819 put_mnt_ns+0x1d6/0x2f0 fs/namespace.c:6264 evict+0x61e/0xb10 fs/inode.c:846 __dentry_kill+0x1a2/0x5e0 fs/dcache.c:670 finish_dput+0xc9/0x480 fs/dcache.c:879 __fput+0x691/0xa70 fs/file_table.c:477 task_work_run+0x1d9/0x270 kernel/task_work.c:233 resume_user_mode_work include/linux/resume_user_mode.h:50 [inline] __exit_to_user_mode_loop kernel/entry/common.c:67 [inline] exit_to_user_mode_loop+0xed/0x480 kernel/entry/common.c:98 __exit_to_user_mode_prepare include/linux/irq-entry-common.h:238 [inline] syscall_exit_to_user_mode_prepare include/linux/irq-entry-common.h:269 [inline] syscall_exit_to_user_mode include/linux/entry-common.h:328 [inline] do_syscall_64+0x33e/0xf80 arch/x86/entry/syscall_64.c:100 entry_SYSCALL_64_after_hwframe+0x77/0x7f RIP: 0033:0x7f563599c799 Code: ff c3 66 2e 0f 1f 84 00 00 00 00 00 0f 1f 44 00 00 48 89 f8 48 89 f7 48 89 d6 48 89 ca 4d 89 c2 4d 89 c8 4c 8b 4c 24 08 0f 05 <48> 3d 01 f0 ff ff 73 01 c3 48 c7 c1 e8 ff ff ff f7 d8 64 89 01 48 RSP: 002b:00007ffe43c20ba8 EFLAGS: 00000246 ORIG_RAX: 00000000000001b4 RAX: 0000000000000000 RBX: 00007ffe43c20c90 RCX: 00007f563599c799 RDX: 0000000000000000 RSI: 000000000000001e RDI: 0000000000000003 RBP: 00000000000579b1 R08: 0000000000000001 R09: 0000000000000000 R10: 0000001b33a20000 R11: 0000000000000246 R12: 00007ffe43c20cd0 R13: 00007f5635c1609c R14: 0000000000057a24 R15: 00007f5635c16090 Modules linked in: ---[ end trace 0000000000000000 ]--- RIP: 0010:__hlist_del include/linux/list.h:992 [inline] RIP: 0010:hlist_del_init include/linux/list.h:1020 [inline] RIP: 0010:__umount_mnt+0x24e/0x490 fs/namespace.c:997 Code: 85 e4 74 61 4d 8d be f8 00 00 00 4c 89 f8 48 c1 e8 03 80 3c 28 00 74 08 4c 89 ff e8 fc 3f e3 ff 4d 8b 2f 4c 89 e0 48 c1 e8 03 <80> 3c 28 00 74 08 4c 89 e7 e8 d4 40 e3 ff 4d 89 2c 24 4d 85 ed 74 RSP: 0018:ffffc900067efa20 EFLAGS: 00010a06 RAX: 1bd5a00000000024 RBX: ffff88806f3af6c8 RCX: ffff88802b448000 RDX: 0000000000000000 RSI: ffffffff8ead7f20 RDI: ffff88806f3af738 RBP: dffffc0000000000 R08: ffffffff903447f7 R09: 1ffffffff20688fe R10: dffffc0000000000 R11: fffffbfff20688ff R12: dead000000000122 R13: dead000000000100 R14: ffff88806f3af6c0 R15: ffff88806f3af7b8 FS: 000055557d4c4500(0000) GS:ffff8881251f3000(0000) knlGS:0000000000000000 CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033 CR2: 00007f56367acff8 CR3: 00000000771dc000 CR4: 00000000003526f0 ---------------- Code disassembly (best guess): 0: 85 e4 test %esp,%esp 2: 74 61 je 0x65 4: 4d 8d be f8 00 00 00 lea 0xf8(%r14),%r15 b: 4c 89 f8 mov %r15,%rax e: 48 c1 e8 03 shr $0x3,%rax 12: 80 3c 28 00 cmpb $0x0,(%rax,%rbp,1) 16: 74 08 je 0x20 18: 4c 89 ff mov %r15,%rdi 1b: e8 fc 3f e3 ff call 0xffe3401c 20: 4d 8b 2f mov (%r15),%r13 23: 4c 89 e0 mov %r12,%rax 26: 48 c1 e8 03 shr $0x3,%rax * 2a: 80 3c 28 00 cmpb $0x0,(%rax,%rbp,1) <-- trapping instruction 2e: 74 08 je 0x38 30: 4c 89 e7 mov %r12,%rdi 33: e8 d4 40 e3 ff call 0xffe3410c 38: 4d 89 2c 24 mov %r13,(%r12) 3c: 4d 85 ed test %r13,%r13 3f: 74 .byte 0x74