==================================================================
BUG: KASAN: use-after-free in fast_dput+0x1e0/0x290 fs/dcache.c:778
Read of size 4 at addr ffff888138040660 by task syz-executor/3808
CPU: 1 PID: 3808 Comm: syz-executor Tainted: G W syzkaller #0
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 07/24/2026
Call Trace:
__dump_stack+0x21/0x24 lib/dump_stack.c:88
dump_stack_lvl+0x110/0x170 lib/dump_stack.c:106
print_address_description+0x71/0x200 mm/kasan/report.c:316
print_report+0x4a/0x60 mm/kasan/report.c:420
kasan_report+0x122/0x150 mm/kasan/report.c:524
__asan_report_load4_noabort+0x14/0x20 mm/kasan/report_generic.c:350
fast_dput+0x1e0/0x290 fs/dcache.c:778
dput+0x21/0x80 fs/dcache.c:905
incfs_free_mount_info+0x60/0x200 fs/incfs/data_mgmt.c:166
incfs_kill_sb+0x1af/0x210 fs/incfs/vfs.c:2005
deactivate_locked_super+0xb5/0x120 fs/super.c:336
deactivate_super+0xaf/0xe0 fs/super.c:367
cleanup_mnt+0x45e/0x4e0 fs/namespace.c:1192
__cleanup_mnt+0x19/0x20 fs/namespace.c:1199
task_work_run+0x1e1/0x250 kernel/task_work.c:203
exit_task_work include/linux/task_work.h:39 [inline]
do_exit+0xb0d/0x29f0 kernel/exit.c:896
do_group_exit+0x21b/0x2e0 kernel/exit.c:1040
__do_sys_exit_group kernel/exit.c:1051 [inline]
__se_sys_exit_group kernel/exit.c:1049 [inline]
__x64_sys_exit_group+0x3f/0x40 kernel/exit.c:1049
x64_sys_call+0x7b4/0x9a0 arch/x86/include/generated/asm/syscalls_64.h:232
do_syscall_x64 arch/x86/entry/common.c:46 [inline]
do_syscall_64+0x4c/0xa0 arch/x86/entry/common.c:76
entry_SYSCALL_64_after_hwframe+0x68/0xd2
RIP: 0033:0x7f8eb479e159
Code: Unable to access opcode bytes at 0x7f8eb479e12f.
RSP: 002b:00007ffc1e9f4258 EFLAGS: 00000246 ORIG_RAX: 00000000000000e7
RAX: ffffffffffffffda RBX: 00007f8eb483451b RCX: 00007f8eb479e159
RDX: 0000000000000000 RSI: 0000000000000000 RDI: 0000000000000001
RBP: 0000000000000009 R08: 0000000000000000 R09: 00007f8eb48344bb
R10: 0000000000000000 R11: 0000000000000246 R12: 00007ffc1e9f5510
R13: 00007f8eb48344bb R14: 0000555571f014e8 R15: 00007ffc1e9f65e0
Allocated by task 4263:
kasan_save_stack mm/kasan/common.c:46 [inline]
kasan_set_track+0x4b/0x70 mm/kasan/common.c:53
kasan_save_alloc_info+0x1f/0x30 mm/kasan/generic.c:505
__kasan_slab_alloc+0x72/0x80 mm/kasan/common.c:334
kasan_slab_alloc include/linux/kasan.h:202 [inline]
slab_post_alloc_hook+0x4f/0x2d0 mm/slab.h:768
slab_alloc_node mm/slub.c:3382 [inline]
slab_alloc mm/slub.c:3392 [inline]
__kmem_cache_alloc_lru mm/slub.c:3399 [inline]
kmem_cache_alloc_lru+0x104/0x280 mm/slub.c:3415
__d_alloc+0x34/0x6d0 fs/dcache.c:1774
d_alloc fs/dcache.c:1854 [inline]
d_alloc_parallel+0xe2/0x1280 fs/dcache.c:2647
__lookup_slow+0x14f/0x410 fs/namei.c:1682
lookup_one_len+0x19d/0x2e0 fs/namei.c:2747
incfs_lookup_dentry+0x60/0xb0 fs/incfs/data_mgmt.c:210
open_or_create_special_dir+0x4c/0x1f0 fs/incfs/vfs.c:477
incfs_mount_fs+0x42f/0x890 fs/incfs/vfs.c:1892
legacy_get_tree+0xfe/0x1a0 fs/fs_context.c:632
vfs_get_tree+0x9a/0x270 fs/super.c:1578
do_new_mount+0x251/0xb40 fs/namespace.c:3081
path_mount+0x640/0xfd0 fs/namespace.c:3411
do_mount fs/namespace.c:3424 [inline]
__do_sys_mount fs/namespace.c:3632 [inline]
__se_sys_mount+0x320/0x390 fs/namespace.c:3609
__x64_sys_mount+0xbf/0xd0 fs/namespace.c:3609
x64_sys_call+0x65d/0x9a0 arch/x86/include/generated/asm/syscalls_64.h:166
do_syscall_x64 arch/x86/entry/common.c:46 [inline]
do_syscall_64+0x4c/0xa0 arch/x86/entry/common.c:76
entry_SYSCALL_64_after_hwframe+0x68/0xd2
Freed by task 4275:
kasan_save_stack mm/kasan/common.c:46 [inline]
kasan_set_track+0x4b/0x70 mm/kasan/common.c:53
kasan_save_free_info+0x2b/0x40 mm/kasan/generic.c:516
____kasan_slab_free+0x132/0x180 mm/kasan/common.c:242
__kasan_slab_free+0x11/0x20 mm/kasan/common.c:250
kasan_slab_free include/linux/kasan.h:178 [inline]
slab_free_hook mm/slub.c:1750 [inline]
slab_free_freelist_hook+0xc2/0x190 mm/slub.c:1776
slab_free mm/slub.c:3712 [inline]
kmem_cache_free+0x12d/0x300 mm/slub.c:3737
__d_free+0x23/0x30 fs/dcache.c:298
rcu_do_batch+0x52b/0xc30 kernel/rcu/tree.c:2297
rcu_core+0x486/0xf00 kernel/rcu/tree.c:2557
rcu_core_si+0x9/0x10 kernel/rcu/tree.c:2574
handle_softirqs+0x1d7/0x600 kernel/softirq.c:642
__do_softirq kernel/softirq.c:680 [inline]
invoke_softirq kernel/softirq.c:497 [inline]
__irq_exit_rcu+0x52/0xf0 kernel/softirq.c:729
irq_exit_rcu+0x9/0x10 kernel/softirq.c:741
instr_sysvec_apic_timer_interrupt arch/x86/kernel/apic/apic.c:1118 [inline]
sysvec_apic_timer_interrupt+0xa9/0xc0 arch/x86/kernel/apic/apic.c:1118
asm_sysvec_apic_timer_interrupt+0x1b/0x20 arch/x86/include/asm/idtentry.h:691
Last potentially related work creation:
kasan_save_stack+0x3a/0x60 mm/kasan/common.c:46
__kasan_record_aux_stack+0xb6/0xc0 mm/kasan/generic.c:486
kasan_record_aux_stack_noalloc+0xb/0x10 mm/kasan/generic.c:496
__call_rcu_common kernel/rcu/tree.c:2807 [inline]
call_rcu+0xcf/0xf50 kernel/rcu/tree.c:2926
dentry_free+0xbd/0x150 fs/dcache.c:-1
__dentry_kill+0x535/0x680 fs/dcache.c:625
dentry_kill+0xc0/0x2a0 fs/dcache.c:-1
dput+0x42/0x80 fs/dcache.c:918
incfs_free_mount_info+0x60/0x200 fs/incfs/data_mgmt.c:166
incfs_kill_sb+0x1af/0x210 fs/incfs/vfs.c:2005
deactivate_locked_super+0xb5/0x120 fs/super.c:336
deactivate_super+0xaf/0xe0 fs/super.c:367
cleanup_mnt+0x45e/0x4e0 fs/namespace.c:1192
__cleanup_mnt+0x19/0x20 fs/namespace.c:1199
task_work_run+0x1e1/0x250 kernel/task_work.c:203
exit_task_work include/linux/task_work.h:39 [inline]
do_exit+0xb0d/0x29f0 kernel/exit.c:896
do_group_exit+0x21b/0x2e0 kernel/exit.c:1040
__do_sys_exit_group kernel/exit.c:1051 [inline]
__se_sys_exit_group kernel/exit.c:1049 [inline]
__x64_sys_exit_group+0x3f/0x40 kernel/exit.c:1049
x64_sys_call+0x7b4/0x9a0 arch/x86/include/generated/asm/syscalls_64.h:232
do_syscall_x64 arch/x86/entry/common.c:46 [inline]
do_syscall_64+0x4c/0xa0 arch/x86/entry/common.c:76
entry_SYSCALL_64_after_hwframe+0x68/0xd2
Second to last potentially related work creation:
kasan_save_stack+0x3a/0x60 mm/kasan/common.c:46
__kasan_record_aux_stack+0xb6/0xc0 mm/kasan/generic.c:486
kasan_record_aux_stack_noalloc+0xb/0x10 mm/kasan/generic.c:496
__call_rcu_common kernel/rcu/tree.c:2807 [inline]
call_rcu+0xcf/0xf50 kernel/rcu/tree.c:2926
dentry_free+0xbd/0x150 fs/dcache.c:-1
__dentry_kill+0x535/0x680 fs/dcache.c:625
shrink_dentry_list+0x38e/0x500 fs/dcache.c:1206
shrink_dcache_parent+0xa9/0x270 fs/dcache.c:-1
d_invalidate+0x112/0x2d0 fs/dcache.c:1742
proc_invalidate_siblings_dcache+0x298/0x3c0 fs/proc/inode.c:148
proc_flush_pid+0x1d/0x20 fs/proc/base.c:3633
release_task+0x10c6/0x1200 kernel/exit.c:286
wait_task_zombie kernel/exit.c:1226 [inline]
wait_consider_task+0x19ff/0x2890 kernel/exit.c:1453
do_wait_thread kernel/exit.c:1516 [inline]
do_wait+0x267/0x9c0 kernel/exit.c:1633
kernel_wait4+0x1d1/0x2b0 kernel/exit.c:1796
__do_sys_wait4 kernel/exit.c:1824 [inline]
__se_sys_wait4 kernel/exit.c:1820 [inline]
__x64_sys_wait4+0x163/0x230 kernel/exit.c:1820
x64_sys_call+0x927/0x9a0 arch/x86/include/generated/asm/syscalls_64.h:62
do_syscall_x64 arch/x86/entry/common.c:46 [inline]
do_syscall_64+0x4c/0xa0 arch/x86/entry/common.c:76
entry_SYSCALL_64_after_hwframe+0x68/0xd2
The buggy address belongs to the object at ffff888138040660
which belongs to the cache dentry of size 208
The buggy address is located 0 bytes inside of
208-byte region [ffff888138040660, ffff888138040730)
The buggy address belongs to the physical page:
page:ffffea0004e01000 refcount:1 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0x138040
flags: 0x4000000000000200(slab|zone=1)
raw: 4000000000000200 ffffea0004e0ec00 dead000000000002 ffff8881001ed080
raw: 0000000000000000 00000000000f000f 00000001ffffffff 0000000000000000
page dumped because: kasan: bad access detected
page_owner tracks the page as allocated
page last allocated via order 0, migratetype Reclaimable, gfp_mask 0x112cd0(GFP_USER|__GFP_NOWARN|__GFP_NORETRY|__GFP_RECLAIMABLE), pid 807, tgid 806 (syz.5.127), ts 52938991329, free_ts 0
set_page_owner include/linux/page_owner.h:33 [inline]
post_alloc_hook+0x1f5/0x210 mm/page_alloc.c:2673
prep_new_page+0x1c/0x110 mm/page_alloc.c:2680
get_page_from_freelist+0x2ca9/0x2d20 mm/page_alloc.c:4587
__alloc_pages+0x1fa/0x610 mm/page_alloc.c:5931
alloc_slab_page+0x6e/0xf0 include/linux/gfp.h:-1
allocate_slab mm/slub.c:1967 [inline]
new_slab+0x98/0x3e0 mm/slub.c:2020
___slab_alloc+0x70f/0xb70 mm/slub.c:3177
__slab_alloc+0x5e/0xa0 mm/slub.c:3263
slab_alloc_node mm/slub.c:3348 [inline]
slab_alloc mm/slub.c:3392 [inline]
__kmem_cache_alloc_lru mm/slub.c:3399 [inline]
kmem_cache_alloc_lru+0x144/0x280 mm/slub.c:3415
__d_alloc+0x34/0x6d0 fs/dcache.c:1774
d_alloc_pseudo+0x1d/0x70 fs/dcache.c:1906
alloc_file_pseudo+0xe0/0x200 fs/file_table.c:265
__anon_inode_getfile fs/anon_inodes.c:122 [inline]
__anon_inode_getfd fs/anon_inodes.c:207 [inline]
anon_inode_getfd+0xd6/0x1d0 fs/anon_inodes.c:242
bpf_map_new_fd+0x5f/0x70 kernel/bpf/syscall.c:874
map_create+0x994/0xcf0 kernel/bpf/syscall.c:1191
__sys_bpf+0x34e/0x850 kernel/bpf/syscall.c:4988
page_owner free stack trace missing
Memory state around the buggy address:
ffff888138040500: fb fb fc fc fc fc fc fc fc fc 00 00 00 00 00 00
ffff888138040580: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00
>ffff888138040600: 00 00 00 00 fc fc fc fc fc fc fc fc fa fb fb fb
^
ffff888138040680: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb
ffff888138040700: fb fb fb fb fb fb fc fc fc fc fc fc fc fc fa fb
==================================================================
------------[ cut here ]------------
WARNING: CPU: 1 PID: 3808 at fs/dcache.c:794 fast_dput+0x207/0x290 fs/dcache.c:794
Modules linked in:
CPU: 1 PID: 3808 Comm: syz-executor Tainted: G B W syzkaller #0
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 07/24/2026
RIP: 0010:fast_dput+0x207/0x290 fs/dcache.c:794
Code: 99 f1 ff e9 4e fe ff ff 89 d9 80 e1 07 80 c1 03 38 c1 0f 8c a1 fe ff ff 48 89 df e8 93 99 f1 ff e9 94 fe ff ff e8 99 0e ac ff <0f> 0b e9 13 ff ff ff 89 d9 80 e1 07 80 c1 03 38 c1 0f 8c ec fe ff
RSP: 0018:ffffc90000a17af0 EFLAGS: 00010293
RAX: ffffffff81c55fa7 RBX: ffff888138040660 RCX: ffff88810f2a8000
RDX: 0000000000000000 RSI: 00000000ffffff80 RDI: 0000000000000001
RBP: ffffc90000a17b18 R08: 0000000000000003 R09: 0000000000000004
R10: dffffc0000000000 R11: fffff52000142f50 R12: 00000000ffffff80
R13: dffffc0000000000 R14: ffff8881380406b8 R15: 1ffff110270080d7
FS: 0000000000000000(0000) GS:ffff8881f6f00000(0000) knlGS:0000000000000000
CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033
CR2: 0000001b3171dff8 CR3: 000000012a135000 CR4: 00000000003506a0
DR0: 0000000000000004 DR1: 00000000000001f7 DR2: fffffffffffffffe
DR3: ffffffdfefffff17 DR6: 00000000fffe0ff0 DR7: 0000000000000400
Call Trace:
dput+0x21/0x80 fs/dcache.c:905
incfs_free_mount_info+0x60/0x200 fs/incfs/data_mgmt.c:166
incfs_kill_sb+0x1af/0x210 fs/incfs/vfs.c:2005
deactivate_locked_super+0xb5/0x120 fs/super.c:336
deactivate_super+0xaf/0xe0 fs/super.c:367
cleanup_mnt+0x45e/0x4e0 fs/namespace.c:1192
__cleanup_mnt+0x19/0x20 fs/namespace.c:1199
task_work_run+0x1e1/0x250 kernel/task_work.c:203
exit_task_work include/linux/task_work.h:39 [inline]
do_exit+0xb0d/0x29f0 kernel/exit.c:896
do_group_exit+0x21b/0x2e0 kernel/exit.c:1040
__do_sys_exit_group kernel/exit.c:1051 [inline]
__se_sys_exit_group kernel/exit.c:1049 [inline]
__x64_sys_exit_group+0x3f/0x40 kernel/exit.c:1049
x64_sys_call+0x7b4/0x9a0 arch/x86/include/generated/asm/syscalls_64.h:232
do_syscall_x64 arch/x86/entry/common.c:46 [inline]
do_syscall_64+0x4c/0xa0 arch/x86/entry/common.c:76
entry_SYSCALL_64_after_hwframe+0x68/0xd2
RIP: 0033:0x7f8eb479e159
Code: Unable to access opcode bytes at 0x7f8eb479e12f.
RSP: 002b:00007ffc1e9f4258 EFLAGS: 00000246 ORIG_RAX: 00000000000000e7
RAX: ffffffffffffffda RBX: 00007f8eb483451b RCX: 00007f8eb479e159
RDX: 0000000000000000 RSI: 0000000000000000 RDI: 0000000000000001
RBP: 0000000000000009 R08: 0000000000000000 R09: 00007f8eb48344bb
R10: 0000000000000000 R11: 0000000000000246 R12: 00007ffc1e9f5510
R13: 00007f8eb48344bb R14: 0000555571f014e8 R15: 00007ffc1e9f65e0
---[ end trace 0000000000000000 ]---
------------[ cut here ]------------
WARNING: CPU: 1 PID: 3808 at fs/dcache.c:669 retain_dentry+0x158/0x2c0 fs/dcache.c:669
Modules linked in:
CPU: 1 PID: 3808 Comm: syz-executor Tainted: G B W syzkaller #0
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 07/24/2026
RIP: 0010:retain_dentry+0x158/0x2c0 fs/dcache.c:669
Code: 31 ff e8 fb 10 ac ff 44 89 e8 83 e0 40 0f 84 b9 00 00 00 e8 ca 0c ac ff b0 01 5b 41 5c 41 5d 41 5e 41 5f 5d c3 e8 b8 0c ac ff <0f> 0b e9 f9 fe ff ff e8 ac 0c ac ff 31 c0 eb e0 e8 a3 0c ac ff 31
RSP: 0018:ffffc90000a17af0 EFLAGS: 00010293
RAX: ffffffff81c56188 RBX: ffff88810c351660 RCX: ffff88810f2a8000
RDX: 0000000000000000 RSI: 0000000010000000 RDI: 0000000000000000
RBP: ffffc90000a17b18 R08: 0000000000000003 R09: 0000000000000004
R10: dffffc0000000000 R11: fffff52000142f34 R12: 1ffff1102186a2cc
R13: ffff888117cb23c8 R14: 0000000010000000 R15: dffffc0000000000
FS: 0000000000000000(0000) GS:ffff8881f6f00000(0000) knlGS:0000000000000000
CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033
CR2: 0000001b3171dff8 CR3: 000000012a135000 CR4: 00000000003506a0
DR0: 0000000000000004 DR1: 00000000000001f7 DR2: fffffffffffffffe
DR3: ffffffdfefffff17 DR6: 00000000fffe0ff0 DR7: 0000000000000400
Call Trace:
dput+0x36/0x80 fs/dcache.c:913
incfs_free_mount_info+0x80/0x200 fs/incfs/data_mgmt.c:167
incfs_kill_sb+0x1af/0x210 fs/incfs/vfs.c:2005
deactivate_locked_super+0xb5/0x120 fs/super.c:336
deactivate_super+0xaf/0xe0 fs/super.c:367
cleanup_mnt+0x45e/0x4e0 fs/namespace.c:1192
__cleanup_mnt+0x19/0x20 fs/namespace.c:1199
task_work_run+0x1e1/0x250 kernel/task_work.c:203
exit_task_work include/linux/task_work.h:39 [inline]
do_exit+0xb0d/0x29f0 kernel/exit.c:896
do_group_exit+0x21b/0x2e0 kernel/exit.c:1040
__do_sys_exit_group kernel/exit.c:1051 [inline]
__se_sys_exit_group kernel/exit.c:1049 [inline]
__x64_sys_exit_group+0x3f/0x40 kernel/exit.c:1049
x64_sys_call+0x7b4/0x9a0 arch/x86/include/generated/asm/syscalls_64.h:232
do_syscall_x64 arch/x86/entry/common.c:46 [inline]
do_syscall_64+0x4c/0xa0 arch/x86/entry/common.c:76
entry_SYSCALL_64_after_hwframe+0x68/0xd2
RIP: 0033:0x7f8eb479e159
Code: Unable to access opcode bytes at 0x7f8eb479e12f.
RSP: 002b:00007ffc1e9f4258 EFLAGS: 00000246 ORIG_RAX: 00000000000000e7
RAX: ffffffffffffffda RBX: 00007f8eb483451b RCX: 00007f8eb479e159
RDX: 0000000000000000 RSI: 0000000000000000 RDI: 0000000000000001
RBP: 0000000000000009 R08: 0000000000000000 R09: 00007f8eb48344bb
R10: 0000000000000000 R11: 0000000000000246 R12: 00007ffc1e9f5510
R13: 00007f8eb48344bb R14: 0000555571f014e8 R15: 00007ffc1e9f65e0
---[ end trace 0000000000000000 ]---
BUG: unable to handle page fault for address: fffffffffffffffc
#PF: supervisor read access in kernel mode
#PF: error_code(0x0000) - not-present page
PGD 7012067 P4D 7012067 PUD 7014067 PMD 0
Oops: 0000 [#1] PREEMPT SMP KASAN
CPU: 1 PID: 3808 Comm: syz-executor Tainted: G B W syzkaller #0
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 07/24/2026
RIP: 0010:__dentry_kill+0xd0/0x680 fs/dcache.c:599
Code: ff 4d 8b 36 49 83 c6 38 4c 89 f0 48 c1 e8 03 42 80 3c 28 00 74 08 4c 89 f7 e8 fc 83 f1 ff 48 89 df 4d 8b 1e 41 ba ee 71 7a d4 <45> 03 53 fc 74 02 0f 0b 41 ff d3 43 0f b6 04 2c 84 c0 0f 85 bf 04
RSP: 0018:ffffc90000a17a98 EFLAGS: 00010246
RAX: 1ffffffff0b63167 RBX: ffff88810c351660 RCX: ffffffff81c57547
RDX: 0000000000000000 RSI: 0000000000000008 RDI: ffff88810c351660
RBP: ffffc90000a17ad8 R08: 0000000000000003 R09: 00000000fffffffb
R10: 00000000d47a71ee R11: 0000000000000000 R12: 1ffff1102186a2cc
R13: dffffc0000000000 R14: ffffffff85b18b38 R15: ffff88810c3516b8
FS: 0000000000000000(0000) GS:ffff8881f6f00000(0000) knlGS:0000000000000000
CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033
CR2: fffffffffffffffc CR3: 000000012a135000 CR4: 00000000003506a0
DR0: 0000000000000004 DR1: 00000000000001f7 DR2: fffffffffffffffe
DR3: ffffffdfefffff17 DR6: 00000000fffe0ff0 DR7: 0000000000000400
Call Trace:
dentry_kill+0xc0/0x2a0 fs/dcache.c:-1
dput+0x42/0x80 fs/dcache.c:918
incfs_free_mount_info+0x80/0x200 fs/incfs/data_mgmt.c:167
incfs_kill_sb+0x1af/0x210 fs/incfs/vfs.c:2005
deactivate_locked_super+0xb5/0x120 fs/super.c:336
deactivate_super+0xaf/0xe0 fs/super.c:367
cleanup_mnt+0x45e/0x4e0 fs/namespace.c:1192
__cleanup_mnt+0x19/0x20 fs/namespace.c:1199
task_work_run+0x1e1/0x250 kernel/task_work.c:203
exit_task_work include/linux/task_work.h:39 [inline]
do_exit+0xb0d/0x29f0 kernel/exit.c:896
do_group_exit+0x21b/0x2e0 kernel/exit.c:1040
__do_sys_exit_group kernel/exit.c:1051 [inline]
__se_sys_exit_group kernel/exit.c:1049 [inline]
__x64_sys_exit_group+0x3f/0x40 kernel/exit.c:1049
x64_sys_call+0x7b4/0x9a0 arch/x86/include/generated/asm/syscalls_64.h:232
do_syscall_x64 arch/x86/entry/common.c:46 [inline]
do_syscall_64+0x4c/0xa0 arch/x86/entry/common.c:76
entry_SYSCALL_64_after_hwframe+0x68/0xd2
RIP: 0033:0x7f8eb479e159
Code: Unable to access opcode bytes at 0x7f8eb479e12f.
RSP: 002b:00007ffc1e9f4258 EFLAGS: 00000246 ORIG_RAX: 00000000000000e7
RAX: ffffffffffffffda RBX: 00007f8eb483451b RCX: 00007f8eb479e159
RDX: 0000000000000000 RSI: 0000000000000000 RDI: 0000000000000001
RBP: 0000000000000009 R08: 0000000000000000 R09: 00007f8eb48344bb
R10: 0000000000000000 R11: 0000000000000246 R12: 00007ffc1e9f5510
R13: 00007f8eb48344bb R14: 0000555571f014e8 R15: 00007ffc1e9f65e0
Modules linked in:
CR2: fffffffffffffffc
---[ end trace 0000000000000000 ]---
RIP: 0010:__dentry_kill+0xd0/0x680 fs/dcache.c:599
Code: ff 4d 8b 36 49 83 c6 38 4c 89 f0 48 c1 e8 03 42 80 3c 28 00 74 08 4c 89 f7 e8 fc 83 f1 ff 48 89 df 4d 8b 1e 41 ba ee 71 7a d4 <45> 03 53 fc 74 02 0f 0b 41 ff d3 43 0f b6 04 2c 84 c0 0f 85 bf 04
RSP: 0018:ffffc90000a17a98 EFLAGS: 00010246
RAX: 1ffffffff0b63167 RBX: ffff88810c351660 RCX: ffffffff81c57547
RDX: 0000000000000000 RSI: 0000000000000008 RDI: ffff88810c351660
RBP: ffffc90000a17ad8 R08: 0000000000000003 R09: 00000000fffffffb
R10: 00000000d47a71ee R11: 0000000000000000 R12: 1ffff1102186a2cc
R13: dffffc0000000000 R14: ffffffff85b18b38 R15: ffff88810c3516b8
FS: 0000000000000000(0000) GS:ffff8881f6f00000(0000) knlGS:0000000000000000
CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033
CR2: fffffffffffffffc CR3: 000000012a135000 CR4: 00000000003506a0
DR0: 0000000000000004 DR1: 00000000000001f7 DR2: fffffffffffffffe
DR3: ffffffdfefffff17 DR6: 00000000fffe0ff0 DR7: 0000000000000400
----------------
Code disassembly (best guess):
0: ff 4d 8b decl -0x75(%rbp)
3: 36 49 83 c6 38 ss add $0x38,%r14
8: 4c 89 f0 mov %r14,%rax
b: 48 c1 e8 03 shr $0x3,%rax
f: 42 80 3c 28 00 cmpb $0x0,(%rax,%r13,1)
14: 74 08 je 0x1e
16: 4c 89 f7 mov %r14,%rdi
19: e8 fc 83 f1 ff call 0xfff1841a
1e: 48 89 df mov %rbx,%rdi
21: 4d 8b 1e mov (%r14),%r11
24: 41 ba ee 71 7a d4 mov $0xd47a71ee,%r10d
* 2a: 45 03 53 fc add -0x4(%r11),%r10d <-- trapping instruction
2e: 74 02 je 0x32
30: 0f 0b ud2
32: 41 ff d3 call *%r11
35: 43 0f b6 04 2c movzbl (%r12,%r13,1),%eax
3a: 84 c0 test %al,%al
3c: 0f .byte 0xf
3d: 85 .byte 0x85
3e: bf .byte 0xbf
3f: 04 .byte 0x4