R10: 000000010000027f R11: 0000000000000246 R12: 0000000000000002
R13: 00007fffd2a6523f R14: 00007f24c3dda300 R15: 0000000000022000
CPU: 0 PID: 10904 Comm: syz-executor.3 Not tainted 6.3.0-rc7-next-20230418 #1
general protection fault, probably for non-canonical address 0xdffffc0000000001: 0000 [#1] PREEMPT SMP KASAN NOPTI
Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS 1.12.0-1 04/01/2014
Call Trace:
KASAN: null-ptr-deref in range [0x0000000000000008-0x000000000000000f]
dump_stack_lvl+0xc1/0xf0
CPU: 1 PID: 10889 Comm: syz-executor.5 Not tainted 6.3.0-rc7-next-20230418 #1
should_fail_ex+0x4b4/0x5b0
Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS 1.12.0-1 04/01/2014
RIP: 0010:folio_wait_stable+0x23/0xe0
should_failslab+0x9/0x20
Code: 90 90 90 90 90 90 90 f3 0f 1e fa 55 48 89 fd 53 e8 32 58 e7 ff 48 8d 7d 18 48 b8 00 00 00 00 00 fc ff df 48 89 fa 48 c1 ea 03 <80> 3c 02 00 0f 85 a4 00 00 00 48 b8 00 00 00 00 00 fc ff df 48 8b
kmem_cache_alloc+0x5a/0x390
RSP: 0018:ffff8880411f7488 EFLAGS: 00010213
__kernfs_new_node+0xd4/0x870
RAX: dffffc0000000000 RBX: ffff88801bfe1680 RCX: ffffc900035de000
RDX: 0000000000000001 RSI: ffffffff81647cce RDI: 000000000000000c
RBP: fffffffffffffff4 R08: 0000000000000001 R09: ffffffff856c1693
R10: fffffbfff0ad82d2 R11: 0000000000000001 R12: 0000000000000000
R13: ffff88801bfe18a8 R14: 0000000000000000 R15: 0000000000000000
FS: 00007f24c3dda700(0000) GS:ffff88806cf00000(0000) knlGS:0000000000000000
kernfs_create_dir_ns+0xa0/0x230
CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033
internal_create_group+0x786/0xb90
CR2: 00007f97c0dc1dc4 CR3: 00000000096ec000 CR4: 0000000000350ee0
Call Trace:
loop_configure+0xce1/0x1900
lo_ioctl+0x934/0x1990
ext4_da_write_begin+0x38d/0x830
generic_perform_write+0x25a/0x580
ext4_buffered_write_iter+0x164/0x460
ext4_file_write_iter+0x3ff/0x1950
blkdev_ioctl+0x35e/0x7e0
__x64_sys_ioctl+0x19e/0x210
do_syscall_64+0x3f/0x90
entry_SYSCALL_64_after_hwframe+0x72/0xdc
RIP: 0033:0x7f03a875f8d7
Code: 3c 1c 48 f7 d8 49 39 c4 72 b8 e8 a4 54 02 00 85 c0 78 bd 48 83 c4 08 4c 89 e0 5b 41 5c c3 0f 1f 44 00 00 b8 10 00 00 00 0f 05 <48> 3d 01 f0 ff ff 73 01 c3 48 c7 c1 bc ff ff ff f7 d8 64 89 01 48
RSP: 002b:00007f03a5cd4f48 EFLAGS: 00000246
ORIG_RAX: 0000000000000010
RAX: ffffffffffffffda RBX: 00007f03a87a9970 RCX: 00007f03a875f8d7
RDX: 0000000000000004 RSI: 0000000000004c00 RDI: 0000000000000005
do_iter_readv_writev+0x211/0x3c0
RBP: 0000000000000005 R08: 0000000000000000 R09: ffffffffffffffff
R10: 0000000000000000 R11: 0000000000000246 R12: 0000000000000004
R13: 0000000000000004 R14: 00000000200007f0 R15: 0000000000000002
do_iter_write+0x189/0x7e0
loop3: detected capacity change from 0 to 128
vfs_iter_write+0x74/0xb0
iter_file_splice_write+0x73f/0xcb0
direct_splice_actor+0x113/0x180
splice_direct_to_actor+0x33a/0x8c0
do_splice_direct+0x1bc/0x290
do_sendfile+0xb1d/0x12b0
__x64_sys_sendfile64+0x1d5/0x210
do_syscall_64+0x3f/0x90
entry_SYSCALL_64_after_hwframe+0x72/0xdc
RIP: 0033:0x7f24c6864b19
Code: ff ff c3 66 2e 0f 1f 84 00 00 00 00 00 0f 1f 40 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 bc ff ff ff f7 d8 64 89 01 48
RSP: 002b:00007f24c3dda188 EFLAGS: 00000246 ORIG_RAX: 0000000000000028
RAX: ffffffffffffffda RBX: 00007f24c6977f60 RCX: 00007f24c6864b19
RDX: 0000000000000000 RSI: 0000000000000007 RDI: 0000000000000006
RBP: 00007f24c3dda1d0 R08: 0000000000000000 R09: 0000000000000000
R10: 000000010000027f R11: 0000000000000246 R12: 0000000000000002
R13: 00007fffd2a6523f R14: 00007f24c3dda300 R15: 0000000000022000
Modules linked in:
---[ end trace 0000000000000000 ]---
RIP: 0010:folio_wait_stable+0x23/0xe0
Code: 90 90 90 90 90 90 90 f3 0f 1e fa 55 48 89 fd 53 e8 32 58 e7 ff 48 8d 7d 18 48 b8 00 00 00 00 00 fc ff df 48 89 fa 48 c1 ea 03 <80> 3c 02 00 0f 85 a4 00 00 00 48 b8 00 00 00 00 00 fc ff df 48 8b
RSP: 0018:ffff8880411f7488 EFLAGS: 00010213
RAX: dffffc0000000000 RBX: ffff88801bfe1680 RCX: ffffc900035de000
RDX: 0000000000000001 RSI: ffffffff81647cce RDI: 000000000000000c
RBP: fffffffffffffff4 R08: 0000000000000001 R09: ffffffff856c1693
R10: fffffbfff0ad82d2 R11: 0000000000000001 R12: 0000000000000000
R13: ffff88801bfe18a8 R14: 0000000000000000 R15: 0000000000000000
FS: 00007f24c3dda700(0000) GS:ffff88806cf00000(0000) knlGS:0000000000000000
CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033
CR2: 00007f97c0dc1dc4 CR3: 00000000096ec000 CR4: 0000000000350ee0
loop7: detected capacity change from 0 to 128
FAT-fs (loop7): bogus number of FAT structure
FAT-fs (loop7): Can't find a valid FAT filesystem
FAT-fs (loop3): bogus number of FAT structure
FAT-fs (loop3): Can't find a valid FAT filesystem
FAULT_INJECTION: forcing a failure.
name fail_usercopy, interval 1, probability 0, space 0, times 0
CPU: 0 PID: 10931 Comm: syz-executor.7 Tainted: G D 6.3.0-rc7-next-20230418 #1
Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS 1.12.0-1 04/01/2014
Call Trace:
dump_stack_lvl+0xc1/0xf0
should_fail_ex+0x4b4/0x5b0
_copy_from_user+0x2e/0x180
__do_sys_memfd_create+0x1b0/0x910
do_syscall_64+0x3f/0x90
entry_SYSCALL_64_after_hwframe+0x72/0xdc
RIP: 0033:0x7f8451765b19
Code: ff ff c3 66 2e 0f 1f 84 00 00 00 00 00 0f 1f 40 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 bc ff ff ff f7 d8 64 89 01 48
RSP: 002b:00007f844ecdaf48 EFLAGS: 00000246 ORIG_RAX: 000000000000013f
RAX: ffffffffffffffda RBX: 00000000200007c0 RCX: 00007f8451765b19
RDX: 0000000000010000 RSI: 0000000000000000 RDI: 00007f84517bf0fb
RBP: 0000000000000002 R08: 0000000000008000 R09: ffffffffffffffff
R10: 0000000000000002 R11: 0000000000000246 R12: 0000000008100000
R13: 0000000020000600 R14: 0000000000010000 R15: 0000000020000680
loop3: detected capacity change from 0 to 128
FAT-fs (loop3): bogus number of FAT structure
FAT-fs (loop3): Can't find a valid FAT filesystem
loop3: detected capacity change from 0 to 128
FAT-fs (loop3): bogus number of FAT structure
FAULT_INJECTION: forcing a failure.
name failslab, interval 1, probability 0, space 0, times 0
FAT-fs (loop3): Can't find a valid FAT filesystem
CPU: 0 PID: 10949 Comm: syz-executor.7 Tainted: G D 6.3.0-rc7-next-20230418 #1
Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS 1.12.0-1 04/01/2014
Call Trace:
dump_stack_lvl+0xc1/0xf0
should_fail_ex+0x4b4/0x5b0
should_failslab+0x9/0x20
kmem_cache_alloc_lru+0x6b/0x600
shmem_alloc_inode+0x27/0x50
alloc_inode+0x63/0x240
new_inode+0x25/0x1f0
shmem_get_inode+0x183/0xeb0
__shmem_file_setup+0x171/0x300
__do_sys_memfd_create+0x32b/0x910
do_syscall_64+0x3f/0x90
entry_SYSCALL_64_after_hwframe+0x72/0xdc
RIP: 0033:0x7f8451765b19
Code: ff ff c3 66 2e 0f 1f 84 00 00 00 00 00 0f 1f 40 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 bc ff ff ff f7 d8 64 89 01 48
RSP: 002b:00007f844ecdaf48 EFLAGS: 00000246 ORIG_RAX: 000000000000013f
RAX: ffffffffffffffda RBX: 00000000200007c0 RCX: 00007f8451765b19
RDX: 0000000000010000 RSI: 0000000000000000 RDI: 00007f84517bf0fb
RBP: 0000000000000002 R08: 0000000000008000 R09: ffffffffffffffff
R10: 0000000000000002 R11: 0000000000000246 R12: 0000000008100000
R13: 0000000020000600 R14: 0000000000010000 R15: 0000000020000680
==================================================================
BUG: KASAN: slab-use-after-free in rwsem_down_write_slowpath+0x13a6/0x14a0
Read of size 4 at addr ffff888019cbb5b4 by task syz-executor.5/271
CPU: 1 PID: 271 Comm: syz-executor.5 Tainted: G D 6.3.0-rc7-next-20230418 #1
Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS 1.12.0-1 04/01/2014
Call Trace:
dump_stack_lvl+0x91/0xf0
print_report+0xcc/0x620
kasan_report+0xc0/0xf0
rwsem_down_write_slowpath+0x13a6/0x14a0
down_write+0x1c3/0x1f0
vfs_unlink+0xd9/0x930
do_unlinkat+0x3b9/0x650
__x64_sys_unlink+0xca/0x110
do_syscall_64+0x3f/0x90
entry_SYSCALL_64_after_hwframe+0x72/0xdc
RIP: 0033:0x7f24c6864457
Code: 73 01 c3 48 c7 c1 bc ff ff ff f7 d8 64 89 01 48 83 c8 ff c3 66 2e 0f 1f 84 00 00 00 00 00 0f 1f 44 00 00 b8 57 00 00 00 0f 05 <48> 3d 01 f0 ff ff 73 01 c3 48 c7 c1 bc ff ff ff f7 d8 64 89 01 48
RSP: 002b:00007fffd2a64388 EFLAGS: 00000206 ORIG_RAX: 0000000000000057
RAX: ffffffffffffffda RBX: 0000000000000000 RCX: 00007f24c6864457
RDX: 00007fffd2a643c0 RSI: 00007fffd2a643c0 RDI: 00007fffd2a64450
RBP: 00007fffd2a64450 R08: 0000000000000001 R09: 00007fffd2a64220
R10: 00005555566b7d13 R11: 0000000000000206 R12: 00007f24c68be105
R13: 00007fffd2a65510 R14: 00005555566b7c20 R15: 00007fffd2a65550
Allocated by task 10888:
kasan_save_stack+0x22/0x50
kasan_set_track+0x25/0x30
__kasan_slab_alloc+0x59/0x70
kmem_cache_alloc_node+0x189/0x3a0
copy_process+0x3c2/0x7330
kernel_clone+0xeb/0x7d0
__do_sys_clone+0xba/0x100
do_syscall_64+0x3f/0x90
entry_SYSCALL_64_after_hwframe+0x72/0xdc
Freed by task 10888:
kasan_save_stack+0x22/0x50
kasan_set_track+0x25/0x30
kasan_save_free_info+0x2e/0x50
__kasan_slab_free+0x10a/0x190
kmem_cache_free+0xff/0x4a0
_free_event+0xab4/0x1150
perf_event_release_kernel+0x5b8/0x7a0
perf_release+0x37/0x50
__fput+0x263/0xa40
task_work_run+0x174/0x280
exit_to_user_mode_prepare+0x17d/0x180
syscall_exit_to_user_mode+0x1d/0x50
do_syscall_64+0x4c/0x90
entry_SYSCALL_64_after_hwframe+0x72/0xdc
Last potentially related work creation:
kasan_save_stack+0x22/0x50
__kasan_record_aux_stack+0x95/0xb0
__call_rcu_common.constprop.0+0x6a/0xb90
put_task_struct_rcu_user+0x87/0xd0
__schedule+0x995/0x2a00
schedule+0xdb/0x1a0
do_nanosleep+0x154/0x510
hrtimer_nanosleep+0x208/0x590
common_nsleep+0xaa/0xd0
__x64_sys_clock_nanosleep+0x335/0x480
do_syscall_64+0x3f/0x90
entry_SYSCALL_64_after_hwframe+0x72/0xdc
Second to last potentially related work creation:
kasan_save_stack+0x22/0x50
__kasan_record_aux_stack+0x95/0xb0
__call_rcu_common.constprop.0+0x6a/0xb90
put_task_struct_rcu_user+0x87/0xd0
__schedule+0x995/0x2a00
schedule+0xdb/0x1a0
exit_to_user_mode_prepare+0x95/0x180
syscall_exit_to_user_mode+0x1d/0x50
do_syscall_64+0x4c/0x90
entry_SYSCALL_64_after_hwframe+0x72/0xdc
The buggy address belongs to the object at ffff888019cbb580
which belongs to the cache task_struct of size 6592
The buggy address is located 52 bytes inside of
freed 6592-byte region [ffff888019cbb580, ffff888019cbcf40)
The buggy address belongs to the physical page:
page:000000007607d865 refcount:1 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0x19cb8
head:000000007607d865 order:3 entire_mapcount:0 nr_pages_mapped:0 pincount:0
memcg:ffff88800e2f1081
flags: 0x100000000010200(slab|head|node=0|zone=1)
page_type: 0xffffffff()
raw: 0100000000010200 ffff888008797640 ffffea00010f7200 dead000000000002
raw: 0000000000000000 0000000000040004 00000001ffffffff ffff88800e2f1081
page dumped because: kasan: bad access detected
Memory state around the buggy address:
ffff888019cbb480: fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc
ffff888019cbb500: fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc
>ffff888019cbb580: fa fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb
^
ffff888019cbb600: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb
ffff888019cbb680: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb
==================================================================
----------------
Code disassembly (best guess):
0: 90 nop
1: 90 nop
2: 90 nop
3: 90 nop
4: 90 nop
5: 90 nop
6: 90 nop
7: f3 0f 1e fa endbr64
b: 55 push %rbp
c: 48 89 fd mov %rdi,%rbp
f: 53 push %rbx
10: e8 32 58 e7 ff callq 0xffe75847
15: 48 8d 7d 18 lea 0x18(%rbp),%rdi
19: 48 b8 00 00 00 00 00 movabs $0xdffffc0000000000,%rax
20: fc ff df
23: 48 89 fa mov %rdi,%rdx
26: 48 c1 ea 03 shr $0x3,%rdx
* 2a: 80 3c 02 00 cmpb $0x0,(%rdx,%rax,1) <-- trapping instruction
2e: 0f 85 a4 00 00 00 jne 0xd8
34: 48 b8 00 00 00 00 00 movabs $0xdffffc0000000000,%rax
3b: fc ff df
3e: 48 rex.W
3f: 8b .byte 0x8b