[syzbot] KASAN: use-after-free Read in io_poll_remove_entries
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syzbot
Mar 22, 2022, 4:52:21 AM3/22/22
to asml.s...@gmail.com, ax...@kernel.dk, io-u...@vger.kernel.org, linux-...@vger.kernel.org, syzkall...@googlegroups.com
Hello,
syzbot found the following issue on:
HEAD commit: 8565d64430f8 Merge tag 'bounds-fixes-v5.18-rc1' of git://g..
git tree: upstream
console output: https://syzkaller.appspot.com/x/log.txt?x=15406ddb700000
kernel config: https://syzkaller.appspot.com/x/.config?x=89040bbe61f60a52
dashboard link: https://syzkaller.appspot.com/bug?extid=cd301bb6523ea8cc8ca2
compiler: gcc (Debian 10.2.1-6) 10.2.1 20210110, GNU ld (GNU Binutils for Debian) 2.35.2
Unfortunately, I don't have any reproducer for this issue yet.
IMPORTANT: if you fix the issue, please add the following tag to the commit:
Reported-by: syzbot+cd301b...@syzkaller.appspotmail.com
==================================================================
BUG: KASAN: use-after-free in __list_del_entry_valid+0xe0/0xf0 lib/list_debug.c:51
Read of size 8 at addr ffff8880700bed30 by task syz-executor.2/5247
CPU: 0 PID: 5247 Comm: syz-executor.2 Tainted: G W 5.17.0-syzkaller-01402-g8565d64430f8 #0
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011
Call Trace:
<TASK>
__dump_stack lib/dump_stack.c:88 [inline]
dump_stack_lvl+0xcd/0x134 lib/dump_stack.c:106
print_address_description.constprop.0.cold+0x8d/0x303 mm/kasan/report.c:255
__kasan_report mm/kasan/report.c:442 [inline]
kasan_report.cold+0x83/0xdf mm/kasan/report.c:459
__list_del_entry_valid+0xe0/0xf0 lib/list_debug.c:51
__list_del_entry include/linux/list.h:134 [inline]
list_del_init include/linux/list.h:206 [inline]
io_poll_remove_entry fs/io_uring.c:5863 [inline]
io_poll_remove_entries.part.0+0x167/0x7e0 fs/io_uring.c:5895
io_poll_remove_entries fs/io_uring.c:5875 [inline]
io_apoll_task_func+0xba/0x230 fs/io_uring.c:5995
handle_tw_list fs/io_uring.c:2480 [inline]
tctx_task_work+0x1a2/0x1380 fs/io_uring.c:2514
task_work_run+0xdd/0x1a0 kernel/task_work.c:164
tracehook_notify_signal include/linux/tracehook.h:213 [inline]
handle_signal_work kernel/entry/common.c:146 [inline]
exit_to_user_mode_loop kernel/entry/common.c:186 [inline]
exit_to_user_mode_prepare+0x256/0x290 kernel/entry/common.c:221
__syscall_exit_to_user_mode_work kernel/entry/common.c:303 [inline]
syscall_exit_to_user_mode+0x19/0x60 kernel/entry/common.c:314
do_syscall_64+0x42/0xb0 arch/x86/entry/common.c:86
entry_SYSCALL_64_after_hwframe+0x44/0xae
RIP: 0033:0x7f2400e65049
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 b8 ff ff ff f7 d8 64 89 01 48
RSP: 002b:00007f23ff7da168 EFLAGS: 00000246 ORIG_RAX: 00000000000001aa
RAX: 0000000000001261 RBX: 00007f2400f77f60 RCX: 00007f2400e65049
RDX: 0000000000000000 RSI: 0000000000001261 RDI: 0000000000000004
RBP: 00007f2400ebf08d R08: 0000000000000000 R09: 0000000030000000
R10: 0000000000000000 R11: 0000000000000246 R12: 0000000000000000
R13: 00007ffd5a0e325f R14: 00007f23ff7da300 R15: 0000000000022000
</TASK>
Allocated by task 5243:
kasan_save_stack+0x1e/0x40 mm/kasan/common.c:38
kasan_set_track mm/kasan/common.c:45 [inline]
set_alloc_info mm/kasan/common.c:436 [inline]
____kasan_kmalloc mm/kasan/common.c:515 [inline]
____kasan_kmalloc mm/kasan/common.c:474 [inline]
__kasan_kmalloc+0xa6/0xd0 mm/kasan/common.c:524
kasan_kmalloc include/linux/kasan.h:249 [inline]
kmem_cache_alloc_trace+0x1ea/0x4a0 mm/slab.c:3567
kmalloc include/linux/slab.h:581 [inline]
io_arm_poll_handler+0x39d/0x940 fs/io_uring.c:6248
io_queue_sqe_arm_apoll+0x6d/0x430 fs/io_uring.c:7499
__io_queue_sqe fs/io_uring.c:7541 [inline]
io_queue_sqe fs/io_uring.c:7568 [inline]
io_submit_sqe fs/io_uring.c:7776 [inline]
io_submit_sqes+0x7dda/0x9310 fs/io_uring.c:7882
__do_sys_io_uring_enter+0x9f1/0x1520 fs/io_uring.c:10924
do_syscall_x64 arch/x86/entry/common.c:50 [inline]
do_syscall_64+0x35/0xb0 arch/x86/entry/common.c:80
entry_SYSCALL_64_after_hwframe+0x44/0xae
Freed by task 5258:
kasan_save_stack+0x1e/0x40 mm/kasan/common.c:38
kasan_set_track+0x21/0x30 mm/kasan/common.c:45
kasan_set_free_info+0x20/0x30 mm/kasan/generic.c:370
____kasan_slab_free mm/kasan/common.c:366 [inline]
____kasan_slab_free+0xff/0x140 mm/kasan/common.c:328
kasan_slab_free include/linux/kasan.h:215 [inline]
__cache_free mm/slab.c:3437 [inline]
kfree+0xf8/0x2b0 mm/slab.c:3794
io_clean_op+0x20a/0xd90 fs/io_uring.c:7137
io_dismantle_req fs/io_uring.c:2270 [inline]
__io_free_req+0xc8/0x3c5 fs/io_uring.c:2280
io_put_req_find_next fs/io_uring.c:2717 [inline]
io_wq_free_work.cold+0x10/0x69 fs/io_uring.c:7301
io_worker_handle_work+0xb3e/0x1b30 fs/io-wq.c:598
io_wqe_worker+0x606/0xd40 fs/io-wq.c:642
ret_from_fork+0x1f/0x30 arch/x86/entry/entry_64.S:295
Last potentially related work creation:
kasan_save_stack+0x1e/0x40 mm/kasan/common.c:38
__kasan_record_aux_stack+0x7e/0x90 mm/kasan/generic.c:348
kvfree_call_rcu+0x74/0x990 kernel/rcu/tree.c:3595
cfg80211_update_known_bss+0x833/0xa60 net/wireless/scan.c:1661
cfg80211_bss_update+0xef/0x2070 net/wireless/scan.c:1708
cfg80211_inform_single_bss_frame_data+0x72b/0xf30 net/wireless/scan.c:2464
cfg80211_inform_bss_frame_data+0xa7/0xb50 net/wireless/scan.c:2497
ieee80211_bss_info_update+0x35b/0xb00 net/mac80211/scan.c:190
ieee80211_rx_bss_info net/mac80211/ibss.c:1119 [inline]
ieee80211_rx_mgmt_probe_beacon net/mac80211/ibss.c:1610 [inline]
ieee80211_ibss_rx_queued_mgmt+0x19cf/0x3150 net/mac80211/ibss.c:1639
ieee80211_iface_process_skb net/mac80211/iface.c:1527 [inline]
ieee80211_iface_work+0xa69/0xd00 net/mac80211/iface.c:1581
process_one_work+0x9ac/0x1650 kernel/workqueue.c:2307
worker_thread+0x657/0x1110 kernel/workqueue.c:2454
kthread+0x2e9/0x3a0 kernel/kthread.c:377
ret_from_fork+0x1f/0x30 arch/x86/entry/entry_64.S:295
The buggy address belongs to the object at ffff8880700bed00
which belongs to the cache kmalloc-96 of size 96
The buggy address is located 48 bytes inside of
96-byte region [ffff8880700bed00, ffff8880700bed60)
The buggy address belongs to the page:
page:ffffea0001c02f80 refcount:1 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0x700be
flags: 0xfff00000000200(slab|node=0|zone=1|lastcpupid=0x7ff)
raw: 00fff00000000200 ffffea0000736b88 ffffea0001eb7448 ffff888010c40300
raw: 0000000000000000 ffff8880700be000 0000000100000020 0000000000000000
page dumped because: kasan: bad access detected
page_owner tracks the page as allocated
page last allocated via order 0, migratetype Unmovable, gfp_mask 0x342220(__GFP_HIGH|__GFP_ATOMIC|__GFP_NOWARN|__GFP_COMP|__GFP_HARDWALL|__GFP_THISNODE), pid 0, ts 118360599722, free_ts 118282284710
prep_new_page mm/page_alloc.c:2434 [inline]
get_page_from_freelist+0xa72/0x2f50 mm/page_alloc.c:4165
__alloc_pages+0x1b2/0x500 mm/page_alloc.c:5389
__alloc_pages_node include/linux/gfp.h:572 [inline]
kmem_getpages mm/slab.c:1378 [inline]
cache_grow_begin+0x75/0x390 mm/slab.c:2584
cache_alloc_refill+0x27f/0x380 mm/slab.c:2957
____cache_alloc mm/slab.c:3040 [inline]
____cache_alloc mm/slab.c:3023 [inline]
__do_cache_alloc mm/slab.c:3267 [inline]
slab_alloc mm/slab.c:3308 [inline]
kmem_cache_alloc_trace+0x380/0x4a0 mm/slab.c:3565
kmalloc include/linux/slab.h:581 [inline]
dst_cow_metrics_generic+0x48/0x1e0 net/core/dst.c:199
dst_metrics_write_ptr include/net/dst.h:119 [inline]
dst_metric_set include/net/dst.h:180 [inline]
icmp6_dst_alloc+0x4fb/0x6c0 net/ipv6/route.c:3284
ndisc_send_skb+0x1146/0x17f0 net/ipv6/ndisc.c:488
ndisc_send_rs+0x12e/0x6f0 net/ipv6/ndisc.c:702
addrconf_rs_timer+0x3f2/0x820 net/ipv6/addrconf.c:3915
call_timer_fn+0x1a5/0x6b0 kernel/time/timer.c:1421
expire_timers kernel/time/timer.c:1466 [inline]
__run_timers.part.0+0x67c/0xa30 kernel/time/timer.c:1734
__run_timers kernel/time/timer.c:1715 [inline]
run_timer_softirq+0xb3/0x1d0 kernel/time/timer.c:1747
__do_softirq+0x29b/0x9c2 kernel/softirq.c:558
page last free stack trace:
reset_page_owner include/linux/page_owner.h:24 [inline]
free_pages_prepare mm/page_alloc.c:1352 [inline]
free_pcp_prepare+0x374/0x870 mm/page_alloc.c:1404
free_unref_page_prepare mm/page_alloc.c:3325 [inline]
free_unref_page+0x19/0x690 mm/page_alloc.c:3404
slab_destroy mm/slab.c:1630 [inline]
slabs_destroy+0x89/0xc0 mm/slab.c:1650
cache_flusharray mm/slab.c:3410 [inline]
___cache_free+0x303/0x600 mm/slab.c:3472
qlink_free mm/kasan/quarantine.c:157 [inline]
qlist_free_all+0x50/0x1a0 mm/kasan/quarantine.c:176
kasan_quarantine_reduce+0x180/0x200 mm/kasan/quarantine.c:283
__kasan_slab_alloc+0x97/0xb0 mm/kasan/common.c:446
kasan_slab_alloc include/linux/kasan.h:239 [inline]
slab_post_alloc_hook mm/slab.h:732 [inline]
slab_alloc_node mm/slab.c:3253 [inline]
kmem_cache_alloc_node+0x2ea/0x590 mm/slab.c:3591
__alloc_skb+0x215/0x340 net/core/skbuff.c:414
alloc_skb include/linux/skbuff.h:1158 [inline]
alloc_skb_with_frags+0x93/0x620 net/core/skbuff.c:5956
sock_alloc_send_pskb+0x793/0x920 net/core/sock.c:2586
mld_newpack.isra.0+0x1be/0x750 net/ipv6/mcast.c:1746
add_grhead+0x283/0x360 net/ipv6/mcast.c:1849
add_grec+0x106a/0x1530 net/ipv6/mcast.c:1987
mld_send_initial_cr.part.0+0xf6/0x230 net/ipv6/mcast.c:2234
mld_send_initial_cr net/ipv6/mcast.c:1232 [inline]
mld_dad_work+0x1d3/0x690 net/ipv6/mcast.c:2260
Memory state around the buggy address:
ffff8880700bec00: fb fb fb fb fb fb fb fb fb fb fb fb fc fc fc fc
ffff8880700bec80: fa fb fb fb fb fb fb fb fb fb fb fb fc fc fc fc
>ffff8880700bed00: fa fb fb fb fb fb fb fb fb fb fb fb fc fc fc fc
^
ffff8880700bed80: fa fb fb fb fb fb fb fb fb fb fb fb fc fc fc fc
ffff8880700bee00: fb fb fb fb fb fb fb fb fb fb fb fb fc fc fc fc
==================================================================
---
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.
syzbot found the following issue on:
HEAD commit: 8565d64430f8 Merge tag 'bounds-fixes-v5.18-rc1' of git://g..
git tree: upstream
console output: https://syzkaller.appspot.com/x/log.txt?x=15406ddb700000
kernel config: https://syzkaller.appspot.com/x/.config?x=89040bbe61f60a52
dashboard link: https://syzkaller.appspot.com/bug?extid=cd301bb6523ea8cc8ca2
compiler: gcc (Debian 10.2.1-6) 10.2.1 20210110, GNU ld (GNU Binutils for Debian) 2.35.2
Unfortunately, I don't have any reproducer for this issue yet.
IMPORTANT: if you fix the issue, please add the following tag to the commit:
Reported-by: syzbot+cd301b...@syzkaller.appspotmail.com
==================================================================
BUG: KASAN: use-after-free in __list_del_entry_valid+0xe0/0xf0 lib/list_debug.c:51
Read of size 8 at addr ffff8880700bed30 by task syz-executor.2/5247
CPU: 0 PID: 5247 Comm: syz-executor.2 Tainted: G W 5.17.0-syzkaller-01402-g8565d64430f8 #0
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011
Call Trace:
<TASK>
__dump_stack lib/dump_stack.c:88 [inline]
dump_stack_lvl+0xcd/0x134 lib/dump_stack.c:106
print_address_description.constprop.0.cold+0x8d/0x303 mm/kasan/report.c:255
__kasan_report mm/kasan/report.c:442 [inline]
kasan_report.cold+0x83/0xdf mm/kasan/report.c:459
__list_del_entry_valid+0xe0/0xf0 lib/list_debug.c:51
__list_del_entry include/linux/list.h:134 [inline]
list_del_init include/linux/list.h:206 [inline]
io_poll_remove_entry fs/io_uring.c:5863 [inline]
io_poll_remove_entries.part.0+0x167/0x7e0 fs/io_uring.c:5895
io_poll_remove_entries fs/io_uring.c:5875 [inline]
io_apoll_task_func+0xba/0x230 fs/io_uring.c:5995
handle_tw_list fs/io_uring.c:2480 [inline]
tctx_task_work+0x1a2/0x1380 fs/io_uring.c:2514
task_work_run+0xdd/0x1a0 kernel/task_work.c:164
tracehook_notify_signal include/linux/tracehook.h:213 [inline]
handle_signal_work kernel/entry/common.c:146 [inline]
exit_to_user_mode_loop kernel/entry/common.c:186 [inline]
exit_to_user_mode_prepare+0x256/0x290 kernel/entry/common.c:221
__syscall_exit_to_user_mode_work kernel/entry/common.c:303 [inline]
syscall_exit_to_user_mode+0x19/0x60 kernel/entry/common.c:314
do_syscall_64+0x42/0xb0 arch/x86/entry/common.c:86
entry_SYSCALL_64_after_hwframe+0x44/0xae
RIP: 0033:0x7f2400e65049
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 b8 ff ff ff f7 d8 64 89 01 48
RSP: 002b:00007f23ff7da168 EFLAGS: 00000246 ORIG_RAX: 00000000000001aa
RAX: 0000000000001261 RBX: 00007f2400f77f60 RCX: 00007f2400e65049
RDX: 0000000000000000 RSI: 0000000000001261 RDI: 0000000000000004
RBP: 00007f2400ebf08d R08: 0000000000000000 R09: 0000000030000000
R10: 0000000000000000 R11: 0000000000000246 R12: 0000000000000000
R13: 00007ffd5a0e325f R14: 00007f23ff7da300 R15: 0000000000022000
</TASK>
Allocated by task 5243:
kasan_save_stack+0x1e/0x40 mm/kasan/common.c:38
kasan_set_track mm/kasan/common.c:45 [inline]
set_alloc_info mm/kasan/common.c:436 [inline]
____kasan_kmalloc mm/kasan/common.c:515 [inline]
____kasan_kmalloc mm/kasan/common.c:474 [inline]
__kasan_kmalloc+0xa6/0xd0 mm/kasan/common.c:524
kasan_kmalloc include/linux/kasan.h:249 [inline]
kmem_cache_alloc_trace+0x1ea/0x4a0 mm/slab.c:3567
kmalloc include/linux/slab.h:581 [inline]
io_arm_poll_handler+0x39d/0x940 fs/io_uring.c:6248
io_queue_sqe_arm_apoll+0x6d/0x430 fs/io_uring.c:7499
__io_queue_sqe fs/io_uring.c:7541 [inline]
io_queue_sqe fs/io_uring.c:7568 [inline]
io_submit_sqe fs/io_uring.c:7776 [inline]
io_submit_sqes+0x7dda/0x9310 fs/io_uring.c:7882
__do_sys_io_uring_enter+0x9f1/0x1520 fs/io_uring.c:10924
do_syscall_x64 arch/x86/entry/common.c:50 [inline]
do_syscall_64+0x35/0xb0 arch/x86/entry/common.c:80
entry_SYSCALL_64_after_hwframe+0x44/0xae
Freed by task 5258:
kasan_save_stack+0x1e/0x40 mm/kasan/common.c:38
kasan_set_track+0x21/0x30 mm/kasan/common.c:45
kasan_set_free_info+0x20/0x30 mm/kasan/generic.c:370
____kasan_slab_free mm/kasan/common.c:366 [inline]
____kasan_slab_free+0xff/0x140 mm/kasan/common.c:328
kasan_slab_free include/linux/kasan.h:215 [inline]
__cache_free mm/slab.c:3437 [inline]
kfree+0xf8/0x2b0 mm/slab.c:3794
io_clean_op+0x20a/0xd90 fs/io_uring.c:7137
io_dismantle_req fs/io_uring.c:2270 [inline]
__io_free_req+0xc8/0x3c5 fs/io_uring.c:2280
io_put_req_find_next fs/io_uring.c:2717 [inline]
io_wq_free_work.cold+0x10/0x69 fs/io_uring.c:7301
io_worker_handle_work+0xb3e/0x1b30 fs/io-wq.c:598
io_wqe_worker+0x606/0xd40 fs/io-wq.c:642
ret_from_fork+0x1f/0x30 arch/x86/entry/entry_64.S:295
Last potentially related work creation:
kasan_save_stack+0x1e/0x40 mm/kasan/common.c:38
__kasan_record_aux_stack+0x7e/0x90 mm/kasan/generic.c:348
kvfree_call_rcu+0x74/0x990 kernel/rcu/tree.c:3595
cfg80211_update_known_bss+0x833/0xa60 net/wireless/scan.c:1661
cfg80211_bss_update+0xef/0x2070 net/wireless/scan.c:1708
cfg80211_inform_single_bss_frame_data+0x72b/0xf30 net/wireless/scan.c:2464
cfg80211_inform_bss_frame_data+0xa7/0xb50 net/wireless/scan.c:2497
ieee80211_bss_info_update+0x35b/0xb00 net/mac80211/scan.c:190
ieee80211_rx_bss_info net/mac80211/ibss.c:1119 [inline]
ieee80211_rx_mgmt_probe_beacon net/mac80211/ibss.c:1610 [inline]
ieee80211_ibss_rx_queued_mgmt+0x19cf/0x3150 net/mac80211/ibss.c:1639
ieee80211_iface_process_skb net/mac80211/iface.c:1527 [inline]
ieee80211_iface_work+0xa69/0xd00 net/mac80211/iface.c:1581
process_one_work+0x9ac/0x1650 kernel/workqueue.c:2307
worker_thread+0x657/0x1110 kernel/workqueue.c:2454
kthread+0x2e9/0x3a0 kernel/kthread.c:377
ret_from_fork+0x1f/0x30 arch/x86/entry/entry_64.S:295
The buggy address belongs to the object at ffff8880700bed00
which belongs to the cache kmalloc-96 of size 96
The buggy address is located 48 bytes inside of
96-byte region [ffff8880700bed00, ffff8880700bed60)
The buggy address belongs to the page:
page:ffffea0001c02f80 refcount:1 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0x700be
flags: 0xfff00000000200(slab|node=0|zone=1|lastcpupid=0x7ff)
raw: 00fff00000000200 ffffea0000736b88 ffffea0001eb7448 ffff888010c40300
raw: 0000000000000000 ffff8880700be000 0000000100000020 0000000000000000
page dumped because: kasan: bad access detected
page_owner tracks the page as allocated
page last allocated via order 0, migratetype Unmovable, gfp_mask 0x342220(__GFP_HIGH|__GFP_ATOMIC|__GFP_NOWARN|__GFP_COMP|__GFP_HARDWALL|__GFP_THISNODE), pid 0, ts 118360599722, free_ts 118282284710
prep_new_page mm/page_alloc.c:2434 [inline]
get_page_from_freelist+0xa72/0x2f50 mm/page_alloc.c:4165
__alloc_pages+0x1b2/0x500 mm/page_alloc.c:5389
__alloc_pages_node include/linux/gfp.h:572 [inline]
kmem_getpages mm/slab.c:1378 [inline]
cache_grow_begin+0x75/0x390 mm/slab.c:2584
cache_alloc_refill+0x27f/0x380 mm/slab.c:2957
____cache_alloc mm/slab.c:3040 [inline]
____cache_alloc mm/slab.c:3023 [inline]
__do_cache_alloc mm/slab.c:3267 [inline]
slab_alloc mm/slab.c:3308 [inline]
kmem_cache_alloc_trace+0x380/0x4a0 mm/slab.c:3565
kmalloc include/linux/slab.h:581 [inline]
dst_cow_metrics_generic+0x48/0x1e0 net/core/dst.c:199
dst_metrics_write_ptr include/net/dst.h:119 [inline]
dst_metric_set include/net/dst.h:180 [inline]
icmp6_dst_alloc+0x4fb/0x6c0 net/ipv6/route.c:3284
ndisc_send_skb+0x1146/0x17f0 net/ipv6/ndisc.c:488
ndisc_send_rs+0x12e/0x6f0 net/ipv6/ndisc.c:702
addrconf_rs_timer+0x3f2/0x820 net/ipv6/addrconf.c:3915
call_timer_fn+0x1a5/0x6b0 kernel/time/timer.c:1421
expire_timers kernel/time/timer.c:1466 [inline]
__run_timers.part.0+0x67c/0xa30 kernel/time/timer.c:1734
__run_timers kernel/time/timer.c:1715 [inline]
run_timer_softirq+0xb3/0x1d0 kernel/time/timer.c:1747
__do_softirq+0x29b/0x9c2 kernel/softirq.c:558
page last free stack trace:
reset_page_owner include/linux/page_owner.h:24 [inline]
free_pages_prepare mm/page_alloc.c:1352 [inline]
free_pcp_prepare+0x374/0x870 mm/page_alloc.c:1404
free_unref_page_prepare mm/page_alloc.c:3325 [inline]
free_unref_page+0x19/0x690 mm/page_alloc.c:3404
slab_destroy mm/slab.c:1630 [inline]
slabs_destroy+0x89/0xc0 mm/slab.c:1650
cache_flusharray mm/slab.c:3410 [inline]
___cache_free+0x303/0x600 mm/slab.c:3472
qlink_free mm/kasan/quarantine.c:157 [inline]
qlist_free_all+0x50/0x1a0 mm/kasan/quarantine.c:176
kasan_quarantine_reduce+0x180/0x200 mm/kasan/quarantine.c:283
__kasan_slab_alloc+0x97/0xb0 mm/kasan/common.c:446
kasan_slab_alloc include/linux/kasan.h:239 [inline]
slab_post_alloc_hook mm/slab.h:732 [inline]
slab_alloc_node mm/slab.c:3253 [inline]
kmem_cache_alloc_node+0x2ea/0x590 mm/slab.c:3591
__alloc_skb+0x215/0x340 net/core/skbuff.c:414
alloc_skb include/linux/skbuff.h:1158 [inline]
alloc_skb_with_frags+0x93/0x620 net/core/skbuff.c:5956
sock_alloc_send_pskb+0x793/0x920 net/core/sock.c:2586
mld_newpack.isra.0+0x1be/0x750 net/ipv6/mcast.c:1746
add_grhead+0x283/0x360 net/ipv6/mcast.c:1849
add_grec+0x106a/0x1530 net/ipv6/mcast.c:1987
mld_send_initial_cr.part.0+0xf6/0x230 net/ipv6/mcast.c:2234
mld_send_initial_cr net/ipv6/mcast.c:1232 [inline]
mld_dad_work+0x1d3/0x690 net/ipv6/mcast.c:2260
Memory state around the buggy address:
ffff8880700bec00: fb fb fb fb fb fb fb fb fb fb fb fb fc fc fc fc
ffff8880700bec80: fa fb fb fb fb fb fb fb fb fb fb fb fc fc fc fc
>ffff8880700bed00: fa fb fb fb fb fb fb fb fb fb fb fb fc fc fc fc
^
ffff8880700bed80: fa fb fb fb fb fb fb fb fb fb fb fb fc fc fc fc
ffff8880700bee00: fb fb fb fb fb fb fb fb fb fb fb fb fc fc fc fc
==================================================================
---
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.
syzbot
Mar 22, 2022, 9:20:23 PM3/22/22
to asml.s...@gmail.com, ax...@kernel.dk, io-u...@vger.kernel.org, linux-...@vger.kernel.org, syzkall...@googlegroups.com
syzbot has found a reproducer for the following issue on:
HEAD commit: b47d5a4f6b8d Merge tag 'audit-pr-20220321' of git://git.ke..
git tree: upstream
console output: https://syzkaller.appspot.com/x/log.txt?x=10e8e8ed700000
kernel config: https://syzkaller.appspot.com/x/.config?x=c44f0c051803a0ae
dashboard link: https://syzkaller.appspot.com/bug?extid=cd301bb6523ea8cc8ca2
compiler: Debian clang version 11.0.1-2, GNU ld (GNU Binutils for Debian) 2.35.2
syz repro: https://syzkaller.appspot.com/x/repro.syz?x=150525ed700000
C reproducer: https://syzkaller.appspot.com/x/repro.c?x=10d08625700000
IMPORTANT: if you fix the issue, please add the following tag to the commit:
Reported-by: syzbot+cd301b...@syzkaller.appspotmail.com
==================================================================
BUG: KASAN: use-after-free in __list_del_entry_valid+0x76/0x100 lib/list_debug.c:51
Read of size 8 at addr ffff88801ecab630 by task syz-executor987/3638
CPU: 1 PID: 3638 Comm: syz-executor987 Tainted: G W 5.17.0-syzkaller-01442-gb47d5a4f6b8d #0
print_address_description+0x65/0x3a0 mm/kasan/report.c:255
__kasan_report mm/kasan/report.c:442 [inline]
kasan_report+0x19a/0x1f0 mm/kasan/report.c:459
__list_del_entry_valid+0x76/0x100 lib/list_debug.c:51
io_apoll_task_func+0x7d/0x2c0 fs/io_uring.c:5995
handle_tw_list fs/io_uring.c:2480 [inline]
tctx_task_work+0xcf1/0x1130 fs/io_uring.c:2514
task_work_run+0x146/0x1c0 kernel/task_work.c:164
exit_task_work include/linux/task_work.h:32 [inline]
do_exit+0x5e3/0x22a0 kernel/exit.c:806
do_group_exit+0x2af/0x2b0 kernel/exit.c:936
__do_sys_exit_group+0x13/0x20 kernel/exit.c:947
__se_sys_exit_group+0x10/0x10 kernel/exit.c:945
__x64_sys_exit_group+0x37/0x40 kernel/exit.c:945
do_syscall_x64 arch/x86/entry/common.c:50 [inline]
do_syscall_64+0x2b/0x70 arch/x86/entry/common.c:80
entry_SYSCALL_64_after_hwframe+0x44/0xae
RIP: 0033:0x7f0e18005c59
Code: Unable to access opcode bytes at RIP 0x7f0e18005c2f.
RSP: 002b:00007fff7d1f37a8 EFLAGS: 00000246 ORIG_RAX: 00000000000000e7
RAX: ffffffffffffffda RBX: 00007f0e1807a330 RCX: 00007f0e18005c59
RDX: 000000000000003c RSI: 00000000000000e7 RDI: 0000000000000000
RBP: 0000000000000000 R08: ffffffffffffffc0 R09: 0000000000000000
R10: 0000000000000000 R11: 0000000000000246 R12: 00007f0e1807a330
R13: 0000000000000001 R14: 0000000000000000 R15: 0000000000000001
</TASK>
Allocated by task 3633:
kasan_save_stack mm/kasan/common.c:38 [inline]
kasan_kmalloc include/linux/kasan.h:249 [inline]
kmem_cache_alloc_trace+0x9d/0x330 mm/slub.c:3257
kmalloc include/linux/slab.h:581 [inline]
io_arm_poll_handler+0x3bd/0x710 fs/io_uring.c:6248
io_queue_sqe_arm_apoll fs/io_uring.c:7499 [inline]
__io_queue_sqe+0x23d/0x10b0 fs/io_uring.c:7541
__do_sys_io_uring_enter fs/io_uring.c:10924 [inline]
__se_sys_io_uring_enter+0x31f/0x2f50 fs/io_uring.c:10850
do_syscall_x64 arch/x86/entry/common.c:50 [inline]
do_syscall_64+0x2b/0x70 arch/x86/entry/common.c:80
entry_SYSCALL_64_after_hwframe+0x44/0xae
Freed by task 3633:
kasan_save_stack mm/kasan/common.c:38 [inline]
kasan_set_track+0x4c/0x70 mm/kasan/common.c:45
kasan_set_free_info+0x1f/0x40 mm/kasan/generic.c:370
____kasan_slab_free+0x126/0x180 mm/kasan/common.c:366
kasan_slab_free include/linux/kasan.h:215 [inline]
slab_free_hook mm/slub.c:1728 [inline]
slab_free_freelist_hook+0x12e/0x1a0 mm/slub.c:1754
slab_free mm/slub.c:3509 [inline]
kfree+0xb8/0x2e0 mm/slub.c:4562
io_clean_op fs/io_uring.c:7137 [inline]
io_dismantle_req+0x644/0x9b0 fs/io_uring.c:2270
__io_req_complete_post+0x294/0x4b0 fs/io_uring.c:2108
io_req_complete_post fs/io_uring.c:2121 [inline]
io_req_complete_failed+0xd7/0x440 fs/io_uring.c:2152
handle_tw_list fs/io_uring.c:2480 [inline]
tctx_task_work+0xcf1/0x1130 fs/io_uring.c:2514
task_work_run+0x146/0x1c0 kernel/task_work.c:164
exit_task_work include/linux/task_work.h:32 [inline]
do_exit+0x5e3/0x22a0 kernel/exit.c:806
do_group_exit+0x2af/0x2b0 kernel/exit.c:936
__do_sys_exit_group+0x13/0x20 kernel/exit.c:947
__ia32_sys_exit_group+0x0/0x40 kernel/exit.c:945
__x64_sys_exit_group+0x37/0x40 kernel/exit.c:945
do_syscall_x64 arch/x86/entry/common.c:50 [inline]
do_syscall_64+0x2b/0x70 arch/x86/entry/common.c:80
entry_SYSCALL_64_after_hwframe+0x44/0xae
The buggy address belongs to the object at ffff88801ecab600
raw: 0000000000000000 0000000000200020 00000001ffffffff 0000000000000000
prep_new_page mm/page_alloc.c:2434 [inline]
get_page_from_freelist+0x729/0x9e0 mm/page_alloc.c:4165
__alloc_pages+0x255/0x580 mm/page_alloc.c:5389
alloc_slab_page mm/slub.c:1799 [inline]
allocate_slab+0xce/0x3f0 mm/slub.c:1944
new_slab mm/slub.c:2004 [inline]
___slab_alloc+0x3fe/0xc30 mm/slub.c:3018
__slab_alloc mm/slub.c:3105 [inline]
slab_alloc_node mm/slub.c:3196 [inline]
slab_alloc mm/slub.c:3238 [inline]
__kmalloc+0x2eb/0x380 mm/slub.c:4420
kmalloc include/linux/slab.h:586 [inline]
kzalloc include/linux/slab.h:714 [inline]
tomoyo_encode2+0x25a/0x560 security/tomoyo/realpath.c:45
tomoyo_encode security/tomoyo/realpath.c:80 [inline]
tomoyo_realpath_from_path+0x5c3/0x610 security/tomoyo/realpath.c:288
tomoyo_get_realpath security/tomoyo/file.c:151 [inline]
tomoyo_check_open_permission+0x22f/0x490 security/tomoyo/file.c:771
security_file_open+0x50/0x570 security/security.c:1651
do_dentry_open+0x350/0x1020 fs/open.c:811
do_open fs/namei.c:3476 [inline]
path_openat+0x273b/0x36a0 fs/namei.c:3609
do_filp_open+0x277/0x4f0 fs/namei.c:3636
do_sys_openat2+0x13b/0x500 fs/open.c:1214
do_sys_open fs/open.c:1230 [inline]
__do_sys_openat fs/open.c:1246 [inline]
__se_sys_openat fs/open.c:1241 [inline]
__x64_sys_openat+0x243/0x290 fs/open.c:1241
do_syscall_x64 arch/x86/entry/common.c:50 [inline]
do_syscall_64+0x2b/0x70 arch/x86/entry/common.c:80
entry_SYSCALL_64_after_hwframe+0x44/0xae
free_unref_page_prepare mm/page_alloc.c:3325 [inline]
free_unref_page+0x7d/0x580 mm/page_alloc.c:3404
free_pipe_info+0x2f6/0x380 fs/pipe.c:851
put_pipe_info fs/pipe.c:711 [inline]
pipe_release+0x235/0x310 fs/pipe.c:734
__fput+0x3fc/0x870 fs/file_table.c:317
task_work_run+0x146/0x1c0 kernel/task_work.c:164
tracehook_notify_resume include/linux/tracehook.h:188 [inline]
exit_to_user_mode_loop kernel/entry/common.c:189 [inline]
exit_to_user_mode_prepare+0x1dd/0x200 kernel/entry/common.c:221
__syscall_exit_to_user_mode_work kernel/entry/common.c:303 [inline]
syscall_exit_to_user_mode+0x2e/0x70 kernel/entry/common.c:314
entry_SYSCALL_64_after_hwframe+0x44/0xae
Memory state around the buggy address:
ffff88801ecab500: 00 00 00 00 00 00 00 00 00 00 00 00 fc fc fc fc
ffff88801ecab580: 00 00 00 00 00 00 00 00 00 fc fc fc fc fc fc fc
>ffff88801ecab600: fa fb fb fb fb fb fb fb fb fb fb fb fc fc fc fc
^
ffff88801ecab680: 00 00 00 00 00 00 00 00 00 00 00 00 fc fc fc fc
ffff88801ecab700: 00 00 00 00 00 00 00 00 00 fc fc fc fc fc fc fc
==================================================================
HEAD commit: b47d5a4f6b8d Merge tag 'audit-pr-20220321' of git://git.ke..
git tree: upstream
console output: https://syzkaller.appspot.com/x/log.txt?x=10e8e8ed700000
kernel config: https://syzkaller.appspot.com/x/.config?x=c44f0c051803a0ae
dashboard link: https://syzkaller.appspot.com/bug?extid=cd301bb6523ea8cc8ca2
compiler: Debian clang version 11.0.1-2, GNU ld (GNU Binutils for Debian) 2.35.2
syz repro: https://syzkaller.appspot.com/x/repro.syz?x=150525ed700000
C reproducer: https://syzkaller.appspot.com/x/repro.c?x=10d08625700000
IMPORTANT: if you fix the issue, please add the following tag to the commit:
Reported-by: syzbot+cd301b...@syzkaller.appspotmail.com
==================================================================
Read of size 8 at addr ffff88801ecab630 by task syz-executor987/3638
CPU: 1 PID: 3638 Comm: syz-executor987 Tainted: G W 5.17.0-syzkaller-01442-gb47d5a4f6b8d #0
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011
Call Trace:
<TASK>
__dump_stack lib/dump_stack.c:88 [inline]
dump_stack_lvl+0x1dc/0x2d8 lib/dump_stack.c:106
Call Trace:
<TASK>
__dump_stack lib/dump_stack.c:88 [inline]
print_address_description+0x65/0x3a0 mm/kasan/report.c:255
__kasan_report mm/kasan/report.c:442 [inline]
kasan_report+0x19a/0x1f0 mm/kasan/report.c:459
__list_del_entry_valid+0x76/0x100 lib/list_debug.c:51
__list_del_entry include/linux/list.h:134 [inline]
list_del_init include/linux/list.h:206 [inline]
io_poll_remove_entry fs/io_uring.c:5863 [inline]
io_poll_remove_entries+0x1a8/0x5c0 fs/io_uring.c:5895
list_del_init include/linux/list.h:206 [inline]
io_poll_remove_entry fs/io_uring.c:5863 [inline]
io_apoll_task_func+0x7d/0x2c0 fs/io_uring.c:5995
handle_tw_list fs/io_uring.c:2480 [inline]
tctx_task_work+0xcf1/0x1130 fs/io_uring.c:2514
task_work_run+0x146/0x1c0 kernel/task_work.c:164
exit_task_work include/linux/task_work.h:32 [inline]
do_exit+0x5e3/0x22a0 kernel/exit.c:806
do_group_exit+0x2af/0x2b0 kernel/exit.c:936
__do_sys_exit_group+0x13/0x20 kernel/exit.c:947
__se_sys_exit_group+0x10/0x10 kernel/exit.c:945
__x64_sys_exit_group+0x37/0x40 kernel/exit.c:945
do_syscall_x64 arch/x86/entry/common.c:50 [inline]
do_syscall_64+0x2b/0x70 arch/x86/entry/common.c:80
entry_SYSCALL_64_after_hwframe+0x44/0xae
RIP: 0033:0x7f0e18005c59
Code: Unable to access opcode bytes at RIP 0x7f0e18005c2f.
RSP: 002b:00007fff7d1f37a8 EFLAGS: 00000246 ORIG_RAX: 00000000000000e7
RAX: ffffffffffffffda RBX: 00007f0e1807a330 RCX: 00007f0e18005c59
RDX: 000000000000003c RSI: 00000000000000e7 RDI: 0000000000000000
RBP: 0000000000000000 R08: ffffffffffffffc0 R09: 0000000000000000
R10: 0000000000000000 R11: 0000000000000246 R12: 00007f0e1807a330
R13: 0000000000000001 R14: 0000000000000000 R15: 0000000000000001
</TASK>
Allocated by task 3633:
kasan_save_stack mm/kasan/common.c:38 [inline]
kasan_set_track mm/kasan/common.c:45 [inline]
set_alloc_info mm/kasan/common.c:436 [inline]
____kasan_kmalloc+0xdc/0x110 mm/kasan/common.c:515
set_alloc_info mm/kasan/common.c:436 [inline]
kasan_kmalloc include/linux/kasan.h:249 [inline]
kmem_cache_alloc_trace+0x9d/0x330 mm/slub.c:3257
kmalloc include/linux/slab.h:581 [inline]
io_arm_poll_handler+0x3bd/0x710 fs/io_uring.c:6248
io_queue_sqe_arm_apoll fs/io_uring.c:7499 [inline]
__io_queue_sqe+0x23d/0x10b0 fs/io_uring.c:7541
io_queue_sqe fs/io_uring.c:7568 [inline]
io_submit_sqe fs/io_uring.c:7776 [inline]
io_submit_sqes+0x1265/0xb050 fs/io_uring.c:7882
io_submit_sqe fs/io_uring.c:7776 [inline]
__do_sys_io_uring_enter fs/io_uring.c:10924 [inline]
__se_sys_io_uring_enter+0x31f/0x2f50 fs/io_uring.c:10850
do_syscall_x64 arch/x86/entry/common.c:50 [inline]
do_syscall_64+0x2b/0x70 arch/x86/entry/common.c:80
entry_SYSCALL_64_after_hwframe+0x44/0xae
Freed by task 3633:
kasan_save_stack mm/kasan/common.c:38 [inline]
kasan_set_track+0x4c/0x70 mm/kasan/common.c:45
kasan_set_free_info+0x1f/0x40 mm/kasan/generic.c:370
____kasan_slab_free+0x126/0x180 mm/kasan/common.c:366
kasan_slab_free include/linux/kasan.h:215 [inline]
slab_free_hook mm/slub.c:1728 [inline]
slab_free_freelist_hook+0x12e/0x1a0 mm/slub.c:1754
slab_free mm/slub.c:3509 [inline]
kfree+0xb8/0x2e0 mm/slub.c:4562
io_clean_op fs/io_uring.c:7137 [inline]
io_dismantle_req+0x644/0x9b0 fs/io_uring.c:2270
__io_req_complete_post+0x294/0x4b0 fs/io_uring.c:2108
io_req_complete_post fs/io_uring.c:2121 [inline]
io_req_complete_failed+0xd7/0x440 fs/io_uring.c:2152
handle_tw_list fs/io_uring.c:2480 [inline]
tctx_task_work+0xcf1/0x1130 fs/io_uring.c:2514
task_work_run+0x146/0x1c0 kernel/task_work.c:164
exit_task_work include/linux/task_work.h:32 [inline]
do_exit+0x5e3/0x22a0 kernel/exit.c:806
do_group_exit+0x2af/0x2b0 kernel/exit.c:936
__do_sys_exit_group+0x13/0x20 kernel/exit.c:947
__ia32_sys_exit_group+0x0/0x40 kernel/exit.c:945
__x64_sys_exit_group+0x37/0x40 kernel/exit.c:945
do_syscall_x64 arch/x86/entry/common.c:50 [inline]
do_syscall_64+0x2b/0x70 arch/x86/entry/common.c:80
entry_SYSCALL_64_after_hwframe+0x44/0xae
The buggy address belongs to the object at ffff88801ecab600
which belongs to the cache kmalloc-96 of size 96
The buggy address is located 48 bytes inside of
96-byte region [ffff88801ecab600, ffff88801ecab660)
The buggy address is located 48 bytes inside of
The buggy address belongs to the page:
page:ffffea00007b2ac0 refcount:1 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0x1ecab
flags: 0xfff00000000200(slab|node=0|zone=1|lastcpupid=0x7ff)
raw: 00fff00000000200 ffffea00007c7580 dead000000000004 ffff888011441780
raw: 0000000000000000 0000000000200020 00000001ffffffff 0000000000000000
page dumped because: kasan: bad access detected
page_owner tracks the page as allocated
page last allocated via order 0, migratetype Unmovable, gfp_mask 0x12c40(GFP_NOFS|__GFP_NOWARN|__GFP_NORETRY), pid 2979, ts 18120987075, free_ts 18116591159
page_owner tracks the page as allocated
prep_new_page mm/page_alloc.c:2434 [inline]
get_page_from_freelist+0x729/0x9e0 mm/page_alloc.c:4165
__alloc_pages+0x255/0x580 mm/page_alloc.c:5389
alloc_slab_page mm/slub.c:1799 [inline]
allocate_slab+0xce/0x3f0 mm/slub.c:1944
new_slab mm/slub.c:2004 [inline]
___slab_alloc+0x3fe/0xc30 mm/slub.c:3018
__slab_alloc mm/slub.c:3105 [inline]
slab_alloc_node mm/slub.c:3196 [inline]
slab_alloc mm/slub.c:3238 [inline]
__kmalloc+0x2eb/0x380 mm/slub.c:4420
kmalloc include/linux/slab.h:586 [inline]
kzalloc include/linux/slab.h:714 [inline]
tomoyo_encode2+0x25a/0x560 security/tomoyo/realpath.c:45
tomoyo_encode security/tomoyo/realpath.c:80 [inline]
tomoyo_realpath_from_path+0x5c3/0x610 security/tomoyo/realpath.c:288
tomoyo_get_realpath security/tomoyo/file.c:151 [inline]
tomoyo_check_open_permission+0x22f/0x490 security/tomoyo/file.c:771
security_file_open+0x50/0x570 security/security.c:1651
do_dentry_open+0x350/0x1020 fs/open.c:811
do_open fs/namei.c:3476 [inline]
path_openat+0x273b/0x36a0 fs/namei.c:3609
do_filp_open+0x277/0x4f0 fs/namei.c:3636
do_sys_openat2+0x13b/0x500 fs/open.c:1214
do_sys_open fs/open.c:1230 [inline]
__do_sys_openat fs/open.c:1246 [inline]
__se_sys_openat fs/open.c:1241 [inline]
__x64_sys_openat+0x243/0x290 fs/open.c:1241
do_syscall_x64 arch/x86/entry/common.c:50 [inline]
do_syscall_64+0x2b/0x70 arch/x86/entry/common.c:80
entry_SYSCALL_64_after_hwframe+0x44/0xae
page last free stack trace:
reset_page_owner include/linux/page_owner.h:24 [inline]
free_pages_prepare mm/page_alloc.c:1352 [inline]
free_pcp_prepare+0xd1c/0xe00 mm/page_alloc.c:1404
reset_page_owner include/linux/page_owner.h:24 [inline]
free_pages_prepare mm/page_alloc.c:1352 [inline]
free_unref_page_prepare mm/page_alloc.c:3325 [inline]
free_unref_page+0x7d/0x580 mm/page_alloc.c:3404
free_pipe_info+0x2f6/0x380 fs/pipe.c:851
put_pipe_info fs/pipe.c:711 [inline]
pipe_release+0x235/0x310 fs/pipe.c:734
__fput+0x3fc/0x870 fs/file_table.c:317
task_work_run+0x146/0x1c0 kernel/task_work.c:164
tracehook_notify_resume include/linux/tracehook.h:188 [inline]
exit_to_user_mode_loop kernel/entry/common.c:189 [inline]
exit_to_user_mode_prepare+0x1dd/0x200 kernel/entry/common.c:221
__syscall_exit_to_user_mode_work kernel/entry/common.c:303 [inline]
syscall_exit_to_user_mode+0x2e/0x70 kernel/entry/common.c:314
entry_SYSCALL_64_after_hwframe+0x44/0xae
Memory state around the buggy address:
ffff88801ecab580: 00 00 00 00 00 00 00 00 00 fc fc fc fc fc fc fc
>ffff88801ecab600: fa fb fb fb fb fb fb fb fb fb fb fb fc fc fc fc
^
ffff88801ecab680: 00 00 00 00 00 00 00 00 00 00 00 00 fc fc fc fc
ffff88801ecab700: 00 00 00 00 00 00 00 00 00 fc fc fc fc fc fc fc
==================================================================
Jens Axboe
Mar 22, 2022, 9:22:42 PM3/22/22
to syzbot, asml.s...@gmail.com, io-u...@vger.kernel.org, linux-...@vger.kernel.org, syzkall...@googlegroups.com
syzbot
Mar 22, 2022, 11:25:13 PM3/22/22
to asml.s...@gmail.com, ax...@kernel.dk, gre...@linuxfoundation.org, io-u...@vger.kernel.org, jiri...@kernel.org, linux-...@vger.kernel.org, syzkall...@googlegroups.com
syzbot has bisected this issue to:
commit 91eac1c69c202d9dad8bf717ae5b92db70bfe5cf
Author: Jens Axboe <ax...@kernel.dk>
Date: Wed Mar 16 22:59:10 2022 +0000
io_uring: cache poll/double-poll state with a request flag
bisection log: https://syzkaller.appspot.com/x/bisect.txt?x=11819d0b700000
start commit: b47d5a4f6b8d Merge tag 'audit-pr-20220321' of git://git.ke..
git tree: upstream
final oops: https://syzkaller.appspot.com/x/report.txt?x=13819d0b700000
console output: https://syzkaller.appspot.com/x/log.txt?x=15819d0b700000
Fixes: 91eac1c69c20 ("io_uring: cache poll/double-poll state with a request flag")
For information about bisection process see: https://goo.gl/tpsmEJ#bisection
commit 91eac1c69c202d9dad8bf717ae5b92db70bfe5cf
Author: Jens Axboe <ax...@kernel.dk>
Date: Wed Mar 16 22:59:10 2022 +0000
io_uring: cache poll/double-poll state with a request flag
bisection log: https://syzkaller.appspot.com/x/bisect.txt?x=11819d0b700000
start commit: b47d5a4f6b8d Merge tag 'audit-pr-20220321' of git://git.ke..
git tree: upstream
final oops: https://syzkaller.appspot.com/x/report.txt?x=13819d0b700000
console output: https://syzkaller.appspot.com/x/log.txt?x=15819d0b700000
kernel config: https://syzkaller.appspot.com/x/.config?x=c44f0c051803a0ae
dashboard link: https://syzkaller.appspot.com/bug?extid=cd301bb6523ea8cc8ca2
dashboard link: https://syzkaller.appspot.com/bug?extid=cd301bb6523ea8cc8ca2
syz repro: https://syzkaller.appspot.com/x/repro.syz?x=150525ed700000
C reproducer: https://syzkaller.appspot.com/x/repro.c?x=10d08625700000
Reported-by: syzbot+cd301b...@syzkaller.appspotmail.com
C reproducer: https://syzkaller.appspot.com/x/repro.c?x=10d08625700000
Fixes: 91eac1c69c20 ("io_uring: cache poll/double-poll state with a request flag")
For information about bisection process see: https://goo.gl/tpsmEJ#bisection
syzbot
Mar 23, 2022, 1:00:10 AM3/23/22
to asml.s...@gmail.com, ax...@kernel.dk, io-u...@vger.kernel.org, linux-...@vger.kernel.org, syzkall...@googlegroups.com
Hello,
syzbot has tested the proposed patch and the reproducer did not trigger any issue:
Reported-and-tested-by: syzbot+cd301b...@syzkaller.appspotmail.com
Tested on:
commit: 7d58de1a io_uring: don't recycle provided buffer if pu..
git tree: git://git.kernel.dk/linux-block for-5.18/io_uring
kernel config: https://syzkaller.appspot.com/x/.config?x=198493467201ec16
Note: testing is done by a robot and is best-effort only.
syzbot has tested the proposed patch and the reproducer did not trigger any issue:
Reported-and-tested-by: syzbot+cd301b...@syzkaller.appspotmail.com
Tested on:
commit: 7d58de1a io_uring: don't recycle provided buffer if pu..
git tree: git://git.kernel.dk/linux-block for-5.18/io_uring
kernel config: https://syzkaller.appspot.com/x/.config?x=198493467201ec16
dashboard link: https://syzkaller.appspot.com/bug?extid=cd301bb6523ea8cc8ca2
compiler: Debian clang version 11.0.1-2, GNU ld (GNU Binutils for Debian) 2.35.2
Note: no patches were applied.
compiler: Debian clang version 11.0.1-2, GNU ld (GNU Binutils for Debian) 2.35.2
Note: testing is done by a robot and is best-effort only.
syzbot
Jul 4, 2023, 7:32:50 PM7/4/23
to syzkall...@googlegroups.com
Auto-closing this bug as obsolete.
No recent activity, existing reproducers are no longer triggering the issue.
No recent activity, existing reproducers are no longer triggering the issue.
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