[moderation] [bluetooth?] KASAN: slab-use-after-free Read in hci_sock_get_cookie (2)
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syzbot
Jun 16, 2024, 9:45:24 AM (10 days ago) Jun 16
to syzkaller-upst...@googlegroups.com
Hello,
syzbot found the following issue on:
HEAD commit: 45403b12c29c ip_tunnel: Move stats allocation to core
git tree: net-next
console output: https://syzkaller.appspot.com/x/log.txt?x=12dd357a980000
kernel config: https://syzkaller.appspot.com/x/.config?x=ce6b8d38d53fa4e
dashboard link: https://syzkaller.appspot.com/bug?extid=829be5372c7242c37743
compiler: Debian clang version 15.0.6, GNU ld (GNU Binutils for Debian) 2.40
CC: [johan....@gmail.com linux-b...@vger.kernel.org linux-...@vger.kernel.org luiz....@gmail.com mar...@holtmann.org net...@vger.kernel.org]
Unfortunately, I don't have any reproducer for this issue yet.
Downloadable assets:
disk image: https://storage.googleapis.com/syzbot-assets/08e0ccb0d0c7/disk-45403b12.raw.xz
vmlinux: https://storage.googleapis.com/syzbot-assets/d8c2fb69ea08/vmlinux-45403b12.xz
kernel image: https://storage.googleapis.com/syzbot-assets/f665a6962ffc/bzImage-45403b12.xz
IMPORTANT: if you fix the issue, please add the following tag to the commit:
Reported-by: syzbot+829be5...@syzkaller.appspotmail.com
==================================================================
BUG: KASAN: slab-use-after-free in hci_sock_get_cookie+0x49/0x50 net/bluetooth/hci_sock.c:96
Read of size 4 at addr ffff888055333568 by task syz-executor.2/5954
CPU: 1 PID: 5954 Comm: syz-executor.2 Not tainted 6.10.0-rc2-syzkaller-00724-g45403b12c29c #0
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 06/07/2024
Call Trace:
<TASK>
__dump_stack lib/dump_stack.c:88 [inline]
dump_stack_lvl+0x241/0x360 lib/dump_stack.c:114
print_address_description mm/kasan/report.c:377 [inline]
print_report+0x169/0x550 mm/kasan/report.c:488
kasan_report+0x143/0x180 mm/kasan/report.c:601
hci_sock_get_cookie+0x49/0x50 net/bluetooth/hci_sock.c:96
mgmt_cmd_status+0x1be/0x4d0 net/bluetooth/mgmt_util.c:149
cmd_status_rsp net/bluetooth/mgmt.c:1451 [inline]
cmd_complete_rsp+0xe7/0x150 net/bluetooth/mgmt.c:1466
mgmt_pending_foreach+0xd1/0x130 net/bluetooth/mgmt_util.c:259
__mgmt_power_off+0x187/0x420 net/bluetooth/mgmt.c:9413
hci_dev_close_sync+0x587/0xf60 net/bluetooth/hci_sync.c:5058
hci_dev_do_close net/bluetooth/hci_core.c:556 [inline]
hci_dev_close+0x112/0x210 net/bluetooth/hci_core.c:581
sock_do_ioctl+0x158/0x460 net/socket.c:1222
sock_ioctl+0x629/0x8e0 net/socket.c:1341
vfs_ioctl fs/ioctl.c:51 [inline]
__do_sys_ioctl fs/ioctl.c:907 [inline]
__se_sys_ioctl+0xfc/0x170 fs/ioctl.c:893
do_syscall_x64 arch/x86/entry/common.c:52 [inline]
do_syscall_64+0xf3/0x230 arch/x86/entry/common.c:83
entry_SYSCALL_64_after_hwframe+0x77/0x7f
RIP: 0033:0x7f2334e7cea9
Code: 28 00 00 00 75 05 48 83 c4 28 c3 e8 e1 20 00 00 90 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 b0 ff ff ff f7 d8 64 89 01 48
RSP: 002b:00007f2335caa0c8 EFLAGS: 00000246 ORIG_RAX: 0000000000000010
RAX: ffffffffffffffda RBX: 00007f2334fb3f80 RCX: 00007f2334e7cea9
RDX: 0000000000000000 RSI: 00000000400448ca RDI: 000000000000000d
RBP: 00007f2334eebff4 R08: 0000000000000000 R09: 0000000000000000
R10: 0000000000000000 R11: 0000000000000246 R12: 0000000000000000
R13: 000000000000000b R14: 00007f2334fb3f80 R15: 00007ffd57013a68
</TASK>
Allocated by task 5225:
kasan_save_stack mm/kasan/common.c:47 [inline]
kasan_save_track+0x3f/0x80 mm/kasan/common.c:68
poison_kmalloc_redzone mm/kasan/common.c:370 [inline]
__kasan_kmalloc+0x98/0xb0 mm/kasan/common.c:387
kasan_kmalloc include/linux/kasan.h:211 [inline]
__do_kmalloc_node mm/slub.c:4121 [inline]
__kmalloc_noprof+0x1f9/0x400 mm/slub.c:4134
kmalloc_noprof include/linux/slab.h:664 [inline]
sk_prot_alloc+0xe0/0x210 net/core/sock.c:2096
sk_alloc+0x38/0x370 net/core/sock.c:2149
bt_sock_alloc+0x3c/0x340 net/bluetooth/af_bluetooth.c:148
hci_sock_create+0xa1/0x190 net/bluetooth/hci_sock.c:2202
bt_sock_create+0x161/0x230 net/bluetooth/af_bluetooth.c:132
__sock_create+0x490/0x920 net/socket.c:1571
sock_create net/socket.c:1622 [inline]
__sys_socket_create net/socket.c:1659 [inline]
__sys_socket+0x150/0x3c0 net/socket.c:1706
__do_sys_socket net/socket.c:1720 [inline]
__se_sys_socket net/socket.c:1718 [inline]
__x64_sys_socket+0x7a/0x90 net/socket.c:1718
do_syscall_x64 arch/x86/entry/common.c:52 [inline]
do_syscall_64+0xf3/0x230 arch/x86/entry/common.c:83
entry_SYSCALL_64_after_hwframe+0x77/0x7f
Freed by task 5962:
kasan_save_stack mm/kasan/common.c:47 [inline]
kasan_save_track+0x3f/0x80 mm/kasan/common.c:68
kasan_save_free_info+0x40/0x50 mm/kasan/generic.c:579
poison_slab_object+0xe0/0x150 mm/kasan/common.c:240
__kasan_slab_free+0x37/0x60 mm/kasan/common.c:256
kasan_slab_free include/linux/kasan.h:184 [inline]
slab_free_hook mm/slub.c:2195 [inline]
slab_free mm/slub.c:4436 [inline]
kfree+0x149/0x360 mm/slub.c:4557
sk_prot_free net/core/sock.c:2132 [inline]
__sk_destruct+0x476/0x5f0 net/core/sock.c:2224
sock_put include/net/sock.h:1879 [inline]
mgmt_pending_free net/bluetooth/mgmt_util.c:307 [inline]
mgmt_pending_remove+0x13e/0x1a0 net/bluetooth/mgmt_util.c:315
mgmt_pending_foreach+0xd1/0x130 net/bluetooth/mgmt_util.c:259
mgmt_index_removed+0xe6/0x340 net/bluetooth/mgmt.c:9346
hci_sock_bind+0xcc6/0x1140 net/bluetooth/hci_sock.c:1307
__sys_bind+0x23d/0x2f0 net/socket.c:1847
__do_sys_bind net/socket.c:1858 [inline]
__se_sys_bind net/socket.c:1856 [inline]
__x64_sys_bind+0x7a/0x90 net/socket.c:1856
do_syscall_x64 arch/x86/entry/common.c:52 [inline]
do_syscall_64+0xf3/0x230 arch/x86/entry/common.c:83
entry_SYSCALL_64_after_hwframe+0x77/0x7f
The buggy address belongs to the object at ffff888055333000
which belongs to the cache kmalloc-2k of size 2048
The buggy address is located 1384 bytes inside of
freed 2048-byte region [ffff888055333000, ffff888055333800)
The buggy address belongs to the physical page:
page: refcount:1 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0x55330
head: order:3 mapcount:0 entire_mapcount:0 nr_pages_mapped:0 pincount:0
flags: 0xfff00000000040(head|node=0|zone=1|lastcpupid=0x7ff)
page_type: 0xffffefff(slab)
raw: 00fff00000000040 ffff888015042000 dead000000000100 dead000000000122
raw: 0000000000000000 0000000000080008 00000001ffffefff 0000000000000000
head: 00fff00000000040 ffff888015042000 dead000000000100 dead000000000122
head: 0000000000000000 0000000000080008 00000001ffffefff 0000000000000000
head: 00fff00000000003 ffffea000154cc01 ffffffffffffffff 0000000000000000
head: 0000000000000008 0000000000000000 00000000ffffffff 0000000000000000
page dumped because: kasan: bad access detected
page_owner tracks the page as allocated
page last allocated via order 3, migratetype Unmovable, gfp_mask 0x1d20c0(__GFP_IO|__GFP_FS|__GFP_NOWARN|__GFP_NORETRY|__GFP_COMP|__GFP_NOMEMALLOC|__GFP_HARDWALL), pid 4538, tgid 4538 (klogd), ts 83329536244, free_ts 22893428251
set_page_owner include/linux/page_owner.h:32 [inline]
post_alloc_hook+0x1f3/0x230 mm/page_alloc.c:1468
prep_new_page mm/page_alloc.c:1476 [inline]
get_page_from_freelist+0x2e2d/0x2ee0 mm/page_alloc.c:3402
__alloc_pages_noprof+0x256/0x6c0 mm/page_alloc.c:4660
__alloc_pages_node_noprof include/linux/gfp.h:269 [inline]
alloc_pages_node_noprof include/linux/gfp.h:296 [inline]
alloc_slab_page+0x5f/0x120 mm/slub.c:2264
allocate_slab+0x5a/0x2e0 mm/slub.c:2427
new_slab mm/slub.c:2480 [inline]
___slab_alloc+0xcd1/0x14b0 mm/slub.c:3666
__slab_alloc+0x58/0xa0 mm/slub.c:3756
__slab_alloc_node mm/slub.c:3809 [inline]
slab_alloc_node mm/slub.c:3988 [inline]
kmalloc_trace_noprof+0x1d5/0x2c0 mm/slub.c:4147
kmalloc_noprof include/linux/slab.h:660 [inline]
syslog_print+0x121/0x9c0 kernel/printk/printk.c:1553
do_syslog+0x3bb/0x810 kernel/printk/printk.c:1731
__do_sys_syslog kernel/printk/printk.c:1823 [inline]
__se_sys_syslog kernel/printk/printk.c:1821 [inline]
__x64_sys_syslog+0x7c/0x90 kernel/printk/printk.c:1821
do_syscall_x64 arch/x86/entry/common.c:52 [inline]
do_syscall_64+0xf3/0x230 arch/x86/entry/common.c:83
entry_SYSCALL_64_after_hwframe+0x77/0x7f
page last free pid 1 tgid 1 stack trace:
reset_page_owner include/linux/page_owner.h:25 [inline]
free_pages_prepare mm/page_alloc.c:1088 [inline]
free_unref_page+0xd22/0xea0 mm/page_alloc.c:2565
free_contig_range+0x9e/0x160 mm/page_alloc.c:6619
destroy_args+0x8a/0x890 mm/debug_vm_pgtable.c:1038
debug_vm_pgtable+0x4be/0x550 mm/debug_vm_pgtable.c:1418
do_one_initcall+0x248/0x880 init/main.c:1267
do_initcall_level+0x157/0x210 init/main.c:1329
do_initcalls+0x3f/0x80 init/main.c:1345
kernel_init_freeable+0x435/0x5d0 init/main.c:1578
kernel_init+0x1d/0x2b0 init/main.c:1467
ret_from_fork+0x4b/0x80 arch/x86/kernel/process.c:147
ret_from_fork_asm+0x1a/0x30 arch/x86/entry/entry_64.S:244
Memory state around the buggy address:
ffff888055333400: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb
ffff888055333480: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb
>ffff888055333500: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb
^
ffff888055333580: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb
ffff888055333600: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb
==================================================================
---
This report is generated by a bot. It may contain errors.
See https://goo.gl/tpsmEJ for more information about syzbot.
syzbot engineers can be reached at syzk...@googlegroups.com.
syzbot will keep track of this issue. See:
https://goo.gl/tpsmEJ#status for how to communicate with syzbot.
If the report is already addressed, let syzbot know by replying with:
#syz fix: exact-commit-title
If you want to overwrite report's subsystems, reply with:
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(See the list of subsystem names on the web dashboard)
If the report is a duplicate of another one, reply with:
#syz dup: exact-subject-of-another-report
If you want to undo deduplication, reply with:
#syz undup
syzbot found the following issue on:
HEAD commit: 45403b12c29c ip_tunnel: Move stats allocation to core
git tree: net-next
console output: https://syzkaller.appspot.com/x/log.txt?x=12dd357a980000
kernel config: https://syzkaller.appspot.com/x/.config?x=ce6b8d38d53fa4e
dashboard link: https://syzkaller.appspot.com/bug?extid=829be5372c7242c37743
compiler: Debian clang version 15.0.6, GNU ld (GNU Binutils for Debian) 2.40
CC: [johan....@gmail.com linux-b...@vger.kernel.org linux-...@vger.kernel.org luiz....@gmail.com mar...@holtmann.org net...@vger.kernel.org]
Unfortunately, I don't have any reproducer for this issue yet.
Downloadable assets:
disk image: https://storage.googleapis.com/syzbot-assets/08e0ccb0d0c7/disk-45403b12.raw.xz
vmlinux: https://storage.googleapis.com/syzbot-assets/d8c2fb69ea08/vmlinux-45403b12.xz
kernel image: https://storage.googleapis.com/syzbot-assets/f665a6962ffc/bzImage-45403b12.xz
IMPORTANT: if you fix the issue, please add the following tag to the commit:
Reported-by: syzbot+829be5...@syzkaller.appspotmail.com
==================================================================
BUG: KASAN: slab-use-after-free in hci_sock_get_cookie+0x49/0x50 net/bluetooth/hci_sock.c:96
Read of size 4 at addr ffff888055333568 by task syz-executor.2/5954
CPU: 1 PID: 5954 Comm: syz-executor.2 Not tainted 6.10.0-rc2-syzkaller-00724-g45403b12c29c #0
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 06/07/2024
Call Trace:
<TASK>
__dump_stack lib/dump_stack.c:88 [inline]
dump_stack_lvl+0x241/0x360 lib/dump_stack.c:114
print_address_description mm/kasan/report.c:377 [inline]
print_report+0x169/0x550 mm/kasan/report.c:488
kasan_report+0x143/0x180 mm/kasan/report.c:601
hci_sock_get_cookie+0x49/0x50 net/bluetooth/hci_sock.c:96
mgmt_cmd_status+0x1be/0x4d0 net/bluetooth/mgmt_util.c:149
cmd_status_rsp net/bluetooth/mgmt.c:1451 [inline]
cmd_complete_rsp+0xe7/0x150 net/bluetooth/mgmt.c:1466
mgmt_pending_foreach+0xd1/0x130 net/bluetooth/mgmt_util.c:259
__mgmt_power_off+0x187/0x420 net/bluetooth/mgmt.c:9413
hci_dev_close_sync+0x587/0xf60 net/bluetooth/hci_sync.c:5058
hci_dev_do_close net/bluetooth/hci_core.c:556 [inline]
hci_dev_close+0x112/0x210 net/bluetooth/hci_core.c:581
sock_do_ioctl+0x158/0x460 net/socket.c:1222
sock_ioctl+0x629/0x8e0 net/socket.c:1341
vfs_ioctl fs/ioctl.c:51 [inline]
__do_sys_ioctl fs/ioctl.c:907 [inline]
__se_sys_ioctl+0xfc/0x170 fs/ioctl.c:893
do_syscall_x64 arch/x86/entry/common.c:52 [inline]
do_syscall_64+0xf3/0x230 arch/x86/entry/common.c:83
entry_SYSCALL_64_after_hwframe+0x77/0x7f
RIP: 0033:0x7f2334e7cea9
Code: 28 00 00 00 75 05 48 83 c4 28 c3 e8 e1 20 00 00 90 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 b0 ff ff ff f7 d8 64 89 01 48
RSP: 002b:00007f2335caa0c8 EFLAGS: 00000246 ORIG_RAX: 0000000000000010
RAX: ffffffffffffffda RBX: 00007f2334fb3f80 RCX: 00007f2334e7cea9
RDX: 0000000000000000 RSI: 00000000400448ca RDI: 000000000000000d
RBP: 00007f2334eebff4 R08: 0000000000000000 R09: 0000000000000000
R10: 0000000000000000 R11: 0000000000000246 R12: 0000000000000000
R13: 000000000000000b R14: 00007f2334fb3f80 R15: 00007ffd57013a68
</TASK>
Allocated by task 5225:
kasan_save_stack mm/kasan/common.c:47 [inline]
kasan_save_track+0x3f/0x80 mm/kasan/common.c:68
poison_kmalloc_redzone mm/kasan/common.c:370 [inline]
__kasan_kmalloc+0x98/0xb0 mm/kasan/common.c:387
kasan_kmalloc include/linux/kasan.h:211 [inline]
__do_kmalloc_node mm/slub.c:4121 [inline]
__kmalloc_noprof+0x1f9/0x400 mm/slub.c:4134
kmalloc_noprof include/linux/slab.h:664 [inline]
sk_prot_alloc+0xe0/0x210 net/core/sock.c:2096
sk_alloc+0x38/0x370 net/core/sock.c:2149
bt_sock_alloc+0x3c/0x340 net/bluetooth/af_bluetooth.c:148
hci_sock_create+0xa1/0x190 net/bluetooth/hci_sock.c:2202
bt_sock_create+0x161/0x230 net/bluetooth/af_bluetooth.c:132
__sock_create+0x490/0x920 net/socket.c:1571
sock_create net/socket.c:1622 [inline]
__sys_socket_create net/socket.c:1659 [inline]
__sys_socket+0x150/0x3c0 net/socket.c:1706
__do_sys_socket net/socket.c:1720 [inline]
__se_sys_socket net/socket.c:1718 [inline]
__x64_sys_socket+0x7a/0x90 net/socket.c:1718
do_syscall_x64 arch/x86/entry/common.c:52 [inline]
do_syscall_64+0xf3/0x230 arch/x86/entry/common.c:83
entry_SYSCALL_64_after_hwframe+0x77/0x7f
Freed by task 5962:
kasan_save_stack mm/kasan/common.c:47 [inline]
kasan_save_track+0x3f/0x80 mm/kasan/common.c:68
kasan_save_free_info+0x40/0x50 mm/kasan/generic.c:579
poison_slab_object+0xe0/0x150 mm/kasan/common.c:240
__kasan_slab_free+0x37/0x60 mm/kasan/common.c:256
kasan_slab_free include/linux/kasan.h:184 [inline]
slab_free_hook mm/slub.c:2195 [inline]
slab_free mm/slub.c:4436 [inline]
kfree+0x149/0x360 mm/slub.c:4557
sk_prot_free net/core/sock.c:2132 [inline]
__sk_destruct+0x476/0x5f0 net/core/sock.c:2224
sock_put include/net/sock.h:1879 [inline]
mgmt_pending_free net/bluetooth/mgmt_util.c:307 [inline]
mgmt_pending_remove+0x13e/0x1a0 net/bluetooth/mgmt_util.c:315
mgmt_pending_foreach+0xd1/0x130 net/bluetooth/mgmt_util.c:259
mgmt_index_removed+0xe6/0x340 net/bluetooth/mgmt.c:9346
hci_sock_bind+0xcc6/0x1140 net/bluetooth/hci_sock.c:1307
__sys_bind+0x23d/0x2f0 net/socket.c:1847
__do_sys_bind net/socket.c:1858 [inline]
__se_sys_bind net/socket.c:1856 [inline]
__x64_sys_bind+0x7a/0x90 net/socket.c:1856
do_syscall_x64 arch/x86/entry/common.c:52 [inline]
do_syscall_64+0xf3/0x230 arch/x86/entry/common.c:83
entry_SYSCALL_64_after_hwframe+0x77/0x7f
The buggy address belongs to the object at ffff888055333000
which belongs to the cache kmalloc-2k of size 2048
The buggy address is located 1384 bytes inside of
freed 2048-byte region [ffff888055333000, ffff888055333800)
The buggy address belongs to the physical page:
page: refcount:1 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0x55330
head: order:3 mapcount:0 entire_mapcount:0 nr_pages_mapped:0 pincount:0
flags: 0xfff00000000040(head|node=0|zone=1|lastcpupid=0x7ff)
page_type: 0xffffefff(slab)
raw: 00fff00000000040 ffff888015042000 dead000000000100 dead000000000122
raw: 0000000000000000 0000000000080008 00000001ffffefff 0000000000000000
head: 00fff00000000040 ffff888015042000 dead000000000100 dead000000000122
head: 0000000000000000 0000000000080008 00000001ffffefff 0000000000000000
head: 00fff00000000003 ffffea000154cc01 ffffffffffffffff 0000000000000000
head: 0000000000000008 0000000000000000 00000000ffffffff 0000000000000000
page dumped because: kasan: bad access detected
page_owner tracks the page as allocated
page last allocated via order 3, migratetype Unmovable, gfp_mask 0x1d20c0(__GFP_IO|__GFP_FS|__GFP_NOWARN|__GFP_NORETRY|__GFP_COMP|__GFP_NOMEMALLOC|__GFP_HARDWALL), pid 4538, tgid 4538 (klogd), ts 83329536244, free_ts 22893428251
set_page_owner include/linux/page_owner.h:32 [inline]
post_alloc_hook+0x1f3/0x230 mm/page_alloc.c:1468
prep_new_page mm/page_alloc.c:1476 [inline]
get_page_from_freelist+0x2e2d/0x2ee0 mm/page_alloc.c:3402
__alloc_pages_noprof+0x256/0x6c0 mm/page_alloc.c:4660
__alloc_pages_node_noprof include/linux/gfp.h:269 [inline]
alloc_pages_node_noprof include/linux/gfp.h:296 [inline]
alloc_slab_page+0x5f/0x120 mm/slub.c:2264
allocate_slab+0x5a/0x2e0 mm/slub.c:2427
new_slab mm/slub.c:2480 [inline]
___slab_alloc+0xcd1/0x14b0 mm/slub.c:3666
__slab_alloc+0x58/0xa0 mm/slub.c:3756
__slab_alloc_node mm/slub.c:3809 [inline]
slab_alloc_node mm/slub.c:3988 [inline]
kmalloc_trace_noprof+0x1d5/0x2c0 mm/slub.c:4147
kmalloc_noprof include/linux/slab.h:660 [inline]
syslog_print+0x121/0x9c0 kernel/printk/printk.c:1553
do_syslog+0x3bb/0x810 kernel/printk/printk.c:1731
__do_sys_syslog kernel/printk/printk.c:1823 [inline]
__se_sys_syslog kernel/printk/printk.c:1821 [inline]
__x64_sys_syslog+0x7c/0x90 kernel/printk/printk.c:1821
do_syscall_x64 arch/x86/entry/common.c:52 [inline]
do_syscall_64+0xf3/0x230 arch/x86/entry/common.c:83
entry_SYSCALL_64_after_hwframe+0x77/0x7f
page last free pid 1 tgid 1 stack trace:
reset_page_owner include/linux/page_owner.h:25 [inline]
free_pages_prepare mm/page_alloc.c:1088 [inline]
free_unref_page+0xd22/0xea0 mm/page_alloc.c:2565
free_contig_range+0x9e/0x160 mm/page_alloc.c:6619
destroy_args+0x8a/0x890 mm/debug_vm_pgtable.c:1038
debug_vm_pgtable+0x4be/0x550 mm/debug_vm_pgtable.c:1418
do_one_initcall+0x248/0x880 init/main.c:1267
do_initcall_level+0x157/0x210 init/main.c:1329
do_initcalls+0x3f/0x80 init/main.c:1345
kernel_init_freeable+0x435/0x5d0 init/main.c:1578
kernel_init+0x1d/0x2b0 init/main.c:1467
ret_from_fork+0x4b/0x80 arch/x86/kernel/process.c:147
ret_from_fork_asm+0x1a/0x30 arch/x86/entry/entry_64.S:244
Memory state around the buggy address:
ffff888055333400: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb
ffff888055333480: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb
>ffff888055333500: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb
^
ffff888055333580: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb
ffff888055333600: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb
==================================================================
---
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Aleksandr Nogikh
Jun 19, 2024, 1:01:35 PM (7 days ago) Jun 19
to syzbot, syzkaller-upst...@googlegroups.com
#syz upstream
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