[syzbot] [hfs?] INFO: task hung in hfs_find_init

[syzbot]

Hello,

syzbot found the following issue on:

HEAD commit: 626932085009 Add linux-next specific files for 20230825
git tree: linux-next
console+strace: https://syzkaller.appspot.com/x/log.txt?x=129f740ba80000
kernel config: https://syzkaller.appspot.com/x/.config?x=8a8c992a790e5073
dashboard link: https://syzkaller.appspot.com/bug?extid=dd327730db1381d8d2a2
compiler: gcc (Debian 12.2.0-14) 12.2.0, GNU ld (GNU Binutils for Debian) 2.40
syz repro: https://syzkaller.appspot.com/x/repro.syz?x=15cbe42fa80000
C reproducer: https://syzkaller.appspot.com/x/repro.c?x=17eab870680000

Downloadable assets:
disk image: https://storage.googleapis.com/syzbot-assets/46ec18b3c2fb/disk-62693208.raw.xz
vmlinux: https://storage.googleapis.com/syzbot-assets/b4ea0cb78498/vmlinux-62693208.xz
kernel image: https://storage.googleapis.com/syzbot-assets/5fb3938c7272/bzImage-62693208.xz
mounted in repro: https://storage.googleapis.com/syzbot-assets/f4d93eaec6e2/mount_0.gz

IMPORTANT: if you fix the issue, please add the following tag to the commit:
Reported-by: syzbot+dd3277...@syzkaller.appspotmail.com

INFO: task kworker/u4:13:2908 blocked for more than 143 seconds.
Not tainted 6.5.0-rc7-next-20230825-syzkaller #0
"echo 0 > /proc/sys/kernel/hung_task_timeout_secs" disables this message.
task:kworker/u4:13 state:D stack:25664 pid:2908 ppid:2 flags:0x00004000
Workqueue: writeback wb_workfn (flush-7:0)
Call Trace:
<TASK>
context_switch kernel/sched/core.c:5382 [inline]
__schedule+0xee1/0x59f0 kernel/sched/core.c:6695
schedule+0xe7/0x1b0 kernel/sched/core.c:6771
schedule_preempt_disabled+0x13/0x20 kernel/sched/core.c:6830
__mutex_lock_common kernel/locking/mutex.c:679 [inline]
__mutex_lock+0x967/0x1340 kernel/locking/mutex.c:747
hfs_find_init+0x17f/0x220 fs/hfs/bfind.c:33
hfs_ext_write_extent+0x18e/0x1f0 fs/hfs/extent.c:141
hfs_write_inode+0xc4/0x9f0 fs/hfs/inode.c:431
write_inode fs/fs-writeback.c:1456 [inline]
__writeback_single_inode+0xa81/0xe70 fs/fs-writeback.c:1668
writeback_sb_inodes+0x599/0x1010 fs/fs-writeback.c:1894
__writeback_inodes_wb+0xff/0x2d0 fs/fs-writeback.c:1965
wb_writeback+0x7f8/0xa90 fs/fs-writeback.c:2072
wb_check_background_flush fs/fs-writeback.c:2142 [inline]
wb_do_writeback fs/fs-writeback.c:2230 [inline]
wb_workfn+0x874/0xfd0 fs/fs-writeback.c:2257
process_one_work+0x887/0x15d0 kernel/workqueue.c:2630
process_scheduled_works kernel/workqueue.c:2703 [inline]
worker_thread+0x8bb/0x1290 kernel/workqueue.c:2784
kthread+0x33a/0x430 kernel/kthread.c:388
ret_from_fork+0x45/0x80 arch/x86/kernel/process.c:147
ret_from_fork_asm+0x11/0x20 arch/x86/entry/entry_64.S:304
</TASK>
INFO: task syz-executor624:5050 blocked for more than 143 seconds.
Not tainted 6.5.0-rc7-next-20230825-syzkaller #0
"echo 0 > /proc/sys/kernel/hung_task_timeout_secs" disables this message.
task:syz-executor624 state:D stack:26944 pid:5050 ppid:5049 flags:0x00004006
Call Trace:
<TASK>
context_switch kernel/sched/core.c:5382 [inline]
__schedule+0xee1/0x59f0 kernel/sched/core.c:6695
schedule+0xe7/0x1b0 kernel/sched/core.c:6771
schedule_preempt_disabled+0x13/0x20 kernel/sched/core.c:6830
__mutex_lock_common kernel/locking/mutex.c:679 [inline]
__mutex_lock+0x967/0x1340 kernel/locking/mutex.c:747
hfs_find_init+0x17f/0x220 fs/hfs/bfind.c:33
hfs_ext_read_extent+0x19c/0x9d0 fs/hfs/extent.c:200
hfs_extend_file+0x4e0/0xb10 fs/hfs/extent.c:401
hfs_bmap_reserve+0x29c/0x370 fs/hfs/btree.c:234
__hfs_ext_write_extent+0x3cb/0x520 fs/hfs/extent.c:121
__hfs_ext_cache_extent fs/hfs/extent.c:174 [inline]
hfs_ext_read_extent+0x805/0x9d0 fs/hfs/extent.c:202
hfs_extend_file+0x4e0/0xb10 fs/hfs/extent.c:401
hfs_get_block+0x17f/0x820 fs/hfs/extent.c:353
__block_write_begin_int+0x3c0/0x1470 fs/buffer.c:2107
__block_write_begin fs/buffer.c:2157 [inline]
block_write_begin+0xb1/0x490 fs/buffer.c:2216
cont_write_begin+0x52f/0x730 fs/buffer.c:2573
hfs_write_begin+0x87/0x140 fs/hfs/inode.c:58
generic_perform_write+0x278/0x600 mm/filemap.c:3945
__generic_file_write_iter+0x1f9/0x240 mm/filemap.c:4040
generic_file_write_iter+0xe3/0x350 mm/filemap.c:4066
call_write_iter include/linux/fs.h:1985 [inline]
new_sync_write fs/read_write.c:491 [inline]
vfs_write+0x650/0xe40 fs/read_write.c:584
ksys_write+0x12f/0x250 fs/read_write.c:637
do_syscall_x64 arch/x86/entry/common.c:50 [inline]
do_syscall_64+0x38/0xb0 arch/x86/entry/common.c:80
entry_SYSCALL_64_after_hwframe+0x63/0xcd
RIP: 0033:0x7f7094b1ea59
RSP: 002b:00007ffe889a4368 EFLAGS: 00000246 ORIG_RAX: 0000000000000001
RAX: ffffffffffffffda RBX: 0000000000000000 RCX: 00007f7094b1ea59
RDX: 000000000208e24b RSI: 0000000020000180 RDI: 0000000000000004
RBP: 00007f7094b925f0 R08: 00005555570c84c0 R09: 00005555570c84c0
R10: 00000000000002ba R11: 0000000000000246 R12: 00007ffe889a4390
R13: 00007ffe889a45b8 R14: 431bde82d7b634db R15: 00007f7094b6703b
</TASK>
INFO: lockdep is turned off.
NMI backtrace for cpu 0
CPU: 0 PID: 29 Comm: khungtaskd Not tainted 6.5.0-rc7-next-20230825-syzkaller #0
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 07/26/2023
Call Trace:
<TASK>
__dump_stack lib/dump_stack.c:88 [inline]
dump_stack_lvl+0xd9/0x1b0 lib/dump_stack.c:106
nmi_cpu_backtrace+0x277/0x380 lib/nmi_backtrace.c:113
nmi_trigger_cpumask_backtrace+0x299/0x300 lib/nmi_backtrace.c:62
trigger_all_cpu_backtrace include/linux/nmi.h:160 [inline]
check_hung_uninterruptible_tasks kernel/hung_task.c:222 [inline]
watchdog+0xfac/0x1230 kernel/hung_task.c:379
kthread+0x33a/0x430 kernel/kthread.c:388
ret_from_fork+0x45/0x80 arch/x86/kernel/process.c:147
ret_from_fork_asm+0x11/0x20 arch/x86/entry/entry_64.S:304
</TASK>
Sending NMI from CPU 0 to CPUs 1:
NMI backtrace for cpu 1
CPU: 1 PID: 4486 Comm: klogd Not tainted 6.5.0-rc7-next-20230825-syzkaller #0
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 07/26/2023
RIP: 0010:__sanitizer_cov_trace_const_cmp1+0x8/0x20 kernel/kcov.c:290
Code: 00 00 f3 0f 1e fa 48 8b 0c 24 48 89 f2 48 89 fe bf 06 00 00 00 e9 f8 fe ff ff 0f 1f 84 00 00 00 00 00 f3 0f 1e fa 48 8b 0c 24 <40> 0f b6 d6 40 0f b6 f7 bf 01 00 00 00 e9 d6 fe ff ff 66 0f 1f 44
RSP: 0018:ffffc9000316f4a0 EFLAGS: 00000246
RAX: 0000000000000001 RBX: ffffc9000316f528 RCX: ffffffff813a6214
RDX: ffff88807d690000 RSI: 0000000000000001 RDI: 0000000000000000
RBP: 0000000000000001 R08: 0000000000000005 R09: 0000000000000000
R10: 0000000000000001 R11: 0000000000000000 R12: ffffc9000316fca8
R13: 0000000000000001 R14: 0000000000000001 R15: 0000000000000001
FS: 00007faa97852380(0000) GS:ffff8880b9900000(0000) knlGS:0000000000000000
CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033
CR2: 000056143bacf680 CR3: 000000007d4dd000 CR4: 00000000003506e0
DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000
DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400
Call Trace:
<NMI>
</NMI>
<TASK>
deref_stack_reg arch/x86/kernel/unwind_orc.c:403 [inline]
unwind_next_frame+0x1aa4/0x2390 arch/x86/kernel/unwind_orc.c:648
arch_stack_walk+0xfa/0x170 arch/x86/kernel/stacktrace.c:25
stack_trace_save+0x96/0xd0 kernel/stacktrace.c:122
kasan_save_stack+0x33/0x50 mm/kasan/common.c:45
kasan_set_track+0x25/0x30 mm/kasan/common.c:52
__kasan_slab_alloc+0x81/0x90 mm/kasan/common.c:328
kasan_slab_alloc include/linux/kasan.h:188 [inline]
slab_post_alloc_hook mm/slab.h:762 [inline]
slab_alloc_node mm/slub.c:3478 [inline]
kmem_cache_alloc_node+0x185/0x3f0 mm/slub.c:3523
__alloc_skb+0x287/0x330 net/core/skbuff.c:634
alloc_skb include/linux/skbuff.h:1286 [inline]
alloc_skb_with_frags+0xe4/0x710 net/core/skbuff.c:6299
sock_alloc_send_pskb+0x7c8/0x950 net/core/sock.c:2794
unix_dgram_sendmsg+0x455/0x1c30 net/unix/af_unix.c:1953
sock_sendmsg_nosec net/socket.c:730 [inline]
sock_sendmsg+0xd9/0x180 net/socket.c:753
__sys_sendto+0x255/0x340 net/socket.c:2176
__do_sys_sendto net/socket.c:2188 [inline]
__se_sys_sendto net/socket.c:2184 [inline]
__x64_sys_sendto+0xe0/0x1b0 net/socket.c:2184
do_syscall_x64 arch/x86/entry/common.c:50 [inline]
do_syscall_64+0x38/0xb0 arch/x86/entry/common.c:80
entry_SYSCALL_64_after_hwframe+0x63/0xcd
RIP: 0033:0x7faa979b49b5
Code: 8b 44 24 08 48 83 c4 28 48 98 c3 48 98 c3 41 89 ca 64 8b 04 25 18 00 00 00 85 c0 75 26 45 31 c9 45 31 c0 b8 2c 00 00 00 0f 05 <48> 3d 00 f0 ff ff 76 7a 48 8b 15 44 c4 0c 00 f7 d8 64 89 02 48 83
RSP: 002b:00007fffe91a6858 EFLAGS: 00000246 ORIG_RAX: 000000000000002c
RAX: ffffffffffffffda RBX: 0000000000000002 RCX: 00007faa979b49b5
RDX: 000000000000008b RSI: 000055f315610e90 RDI: 0000000000000003
RBP: 000055f31560c910 R08: 0000000000000000 R09: 0000000000000000
R10: 0000000000004000 R11: 0000000000000246 R12: 0000000000000013
R13: 00007faa97b42212 R14: 00007fffe91a6958 R15: 0000000000000000
</TASK>
INFO: NMI handler (nmi_cpu_backtrace_handler) took too long to run: 2.859 msecs


---
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 bug is already fixed, let syzbot know by replying with:
#syz fix: exact-commit-title

If you want syzbot to run the reproducer, reply with:
#syz test: git://repo/address.git branch-or-commit-hash
If you attach or paste a git patch, syzbot will apply it before testing.

If you want to overwrite bug's subsystems, reply with:
#syz set subsystems: new-subsystem
(See the list of subsystem names on the web dashboard)

If the bug is a duplicate of another bug, reply with:
#syz dup: exact-subject-of-another-report

If you want to undo deduplication, reply with:
#syz undup

[Lizhi Xu]

#syz test https://git.kernel.org/pub/scm/linux/kernel/git/next/linux-next.git 626932085009

diff --git a/fs/hfs/extent.c b/fs/hfs/extent.c
index 6d1878b99b30..166f963d32fa 100644
--- a/fs/hfs/extent.c
+++ b/fs/hfs/extent.c
@@ -290,7 +290,7 @@ int hfs_free_fork(struct super_block *sb, struct hfs_cat_file *file, int type)
u32 total_blocks, blocks, start;
u32 cnid = be32_to_cpu(file->FlNum);
struct hfs_extent *extent;
- int res, i;
+ int res, i, n = 0;

if (type == HFS_FK_DATA) {
total_blocks = be32_to_cpu(file->PyLen);
@@ -317,6 +317,14 @@ int hfs_free_fork(struct super_block *sb, struct hfs_cat_file *file, int type)
if (res)
return res;
do {
+ if (n > 3 ) {
+ hfs_find_exit(&fd);
+ schedule_timeout_uninterruptible(HZ/10);
+ res = hfs_find_init(HFS_SB(sb)->ext_tree, &fd);
+ if (res)
+ return res;
+ n = 0;
+ }
res = __hfs_ext_read_extent(&fd, extent, cnid, total_blocks, type);
if (res)
break;
@@ -324,6 +332,7 @@ int hfs_free_fork(struct super_block *sb, struct hfs_cat_file *file, int type)
hfs_free_extents(sb, extent, total_blocks - start, total_blocks);
hfs_brec_remove(&fd);
total_blocks = start;
+ n++;
} while (total_blocks > blocks);
hfs_find_exit(&fd);

@@ -479,7 +488,7 @@ void hfs_file_truncate(struct inode *inode)
struct hfs_find_data fd;
u16 blk_cnt, alloc_cnt, start;
u32 size;
- int res;
+ int res, n = 0;

hfs_dbg(INODE, "truncate: %lu, %Lu -> %Lu\n",
inode->i_ino, (long long)HFS_I(inode)->phys_size,
@@ -516,6 +525,14 @@ void hfs_file_truncate(struct inode *inode)
return;
}
while (1) {
+ if (n > 3 ) {
+ hfs_find_exit(&fd);
+ schedule_timeout_uninterruptible(HZ/10);
+ res = hfs_find_init(HFS_SB(sb)->ext_tree, &fd);
+ if (res)
+ return res;
+ n = 0;
+ }
if (alloc_cnt == HFS_I(inode)->first_blocks) {
hfs_free_extents(sb, HFS_I(inode)->first_extents,
alloc_cnt, alloc_cnt - blk_cnt);
@@ -538,6 +555,7 @@ void hfs_file_truncate(struct inode *inode)
HFS_I(inode)->cached_start = HFS_I(inode)->cached_blocks = 0;
HFS_I(inode)->flags &= ~(HFS_FLG_EXT_DIRTY|HFS_FLG_EXT_NEW);
hfs_brec_remove(&fd);
+ n++;
}
hfs_find_exit(&fd);
mutex_unlock(&HFS_I(inode)->extents_lock);

[syzbot]

Hello,

syzbot tried to test the proposed patch but the build/boot failed:

fs/hfs/extent.c:533:40: error: 'return' with a value, in function returning void [-Werror=return-type]


Tested on:

commit: 62693208 Add linux-next specific files for 20230825
git tree: https://git.kernel.org/pub/scm/linux/kernel/git/next/linux-next.git

kernel config: https://syzkaller.appspot.com/x/.config?x=8a8c992a790e5073
dashboard link: https://syzkaller.appspot.com/bug?extid=dd327730db1381d8d2a2
compiler: gcc (Debian 12.2.0-14) 12.2.0, GNU ld (GNU Binutils for Debian) 2.40

patch: https://syzkaller.appspot.com/x/patch.diff?x=14060e13a80000

[Lizhi Xu]

+ return;

[syzbot]

Hello,

syzbot has tested the proposed patch but the reproducer is still triggering an issue:
INFO: task hung in hfs_find_init

INFO: task kworker/u4:7:1036 blocked for more than 143 seconds.
Not tainted 6.5.0-rc7-next-20230825-syzkaller-dirty #0

"echo 0 > /proc/sys/kernel/hung_task_timeout_secs" disables this message.

task:kworker/u4:7 state:D stack:24272 pid:1036 ppid:2 flags:0x00004000

INFO: task syz-executor.0:5462 blocked for more than 143 seconds.
Not tainted 6.5.0-rc7-next-20230825-syzkaller-dirty #0

"echo 0 > /proc/sys/kernel/hung_task_timeout_secs" disables this message.

task:syz-executor.0 state:D stack:26936 pid:5462 ppid:5393 flags:0x00004006

Call Trace:
<TASK>
context_switch kernel/sched/core.c:5382 [inline]
__schedule+0xee1/0x59f0 kernel/sched/core.c:6695
schedule+0xe7/0x1b0 kernel/sched/core.c:6771
schedule_preempt_disabled+0x13/0x20 kernel/sched/core.c:6830
__mutex_lock_common kernel/locking/mutex.c:679 [inline]
__mutex_lock+0x967/0x1340 kernel/locking/mutex.c:747
hfs_find_init+0x17f/0x220 fs/hfs/bfind.c:33
hfs_ext_read_extent+0x19c/0x9d0 fs/hfs/extent.c:200

hfs_extend_file+0x4e0/0xb10 fs/hfs/extent.c:410

hfs_bmap_reserve+0x29c/0x370 fs/hfs/btree.c:234
__hfs_ext_write_extent+0x3cb/0x520 fs/hfs/extent.c:121
__hfs_ext_cache_extent fs/hfs/extent.c:174 [inline]
hfs_ext_read_extent+0x805/0x9d0 fs/hfs/extent.c:202

hfs_extend_file+0x4e0/0xb10 fs/hfs/extent.c:410
hfs_get_block+0x17f/0x820 fs/hfs/extent.c:362

__block_write_begin_int+0x3c0/0x1470 fs/buffer.c:2107
__block_write_begin fs/buffer.c:2157 [inline]
block_write_begin+0xb1/0x490 fs/buffer.c:2216
cont_write_begin+0x52f/0x730 fs/buffer.c:2573
hfs_write_begin+0x87/0x140 fs/hfs/inode.c:58
generic_perform_write+0x278/0x600 mm/filemap.c:3945
__generic_file_write_iter+0x1f9/0x240 mm/filemap.c:4040
generic_file_write_iter+0xe3/0x350 mm/filemap.c:4066
call_write_iter include/linux/fs.h:1985 [inline]
new_sync_write fs/read_write.c:491 [inline]
vfs_write+0x650/0xe40 fs/read_write.c:584
ksys_write+0x12f/0x250 fs/read_write.c:637
do_syscall_x64 arch/x86/entry/common.c:50 [inline]
do_syscall_64+0x38/0xb0 arch/x86/entry/common.c:80
entry_SYSCALL_64_after_hwframe+0x63/0xcd

RIP: 0033:0x7f9ed527cae9
RSP: 002b:00007f9ed5ff70c8 EFLAGS: 00000246 ORIG_RAX: 0000000000000001
RAX: ffffffffffffffda RBX: 00007f9ed539bf80 RCX: 00007f9ed527cae9

RDX: 000000000208e24b RSI: 0000000020000180 RDI: 0000000000000004

RBP: 00007f9ed52c847a R08: 0000000000000000 R09: 0000000000000000
R10: 0000000000000000 R11: 0000000000000246 R12: 0000000000000000
R13: 000000000000000b R14: 00007f9ed539bf80 R15: 00007fff8b4e7dc8

</TASK>
INFO: lockdep is turned off.
NMI backtrace for cpu 0

CPU: 0 PID: 29 Comm: khungtaskd Not tainted 6.5.0-rc7-next-20230825-syzkaller-dirty #0

Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 07/26/2023
Call Trace:
<TASK>
__dump_stack lib/dump_stack.c:88 [inline]
dump_stack_lvl+0xd9/0x1b0 lib/dump_stack.c:106
nmi_cpu_backtrace+0x277/0x380 lib/nmi_backtrace.c:113
nmi_trigger_cpumask_backtrace+0x299/0x300 lib/nmi_backtrace.c:62
trigger_all_cpu_backtrace include/linux/nmi.h:160 [inline]
check_hung_uninterruptible_tasks kernel/hung_task.c:222 [inline]
watchdog+0xfac/0x1230 kernel/hung_task.c:379
kthread+0x33a/0x430 kernel/kthread.c:388
ret_from_fork+0x45/0x80 arch/x86/kernel/process.c:147
ret_from_fork_asm+0x11/0x20 arch/x86/entry/entry_64.S:304
</TASK>
Sending NMI from CPU 0 to CPUs 1:
NMI backtrace for cpu 1

CPU: 1 PID: 957 Comm: kworker/u4:5 Not tainted 6.5.0-rc7-next-20230825-syzkaller-dirty #0

Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 07/26/2023

Workqueue: events_unbound toggle_allocation_gate
RIP: 0010:__phys_addr+0x10/0x140 arch/x86/mm/physaddr.c:16
Code: 99 8c e8 43 06 a2 00 eb 88 e8 3c 06 a2 00 e9 37 ff ff ff 0f 1f 80 00 00 00 00 f3 0f 1e fa 41 54 45 31 e4 55 bd 00 00 00 80 53 <48> 89 fb e8 b8 4b 4c 00 48 01 dd 48 89 df 41 0f 92 c4 48 89 ee e8
RSP: 0018:ffffc900052cf980 EFLAGS: 00000246
RAX: 0000000000000000 RBX: 0000000000000001 RCX: 0000000000000000
RDX: ffff88801e2d0000 RSI: ffffffff812fdd3a RDI: ffffffff81dd4989
RBP: 0000000080000000 R08: 0000000000000005 R09: 0000000000000000
R10: 0000000000000001 R11: 0000000000000000 R12: 0000000000000000
R13: 0000000000000003 R14: 0000000000000000 R15: 0000000000000001
FS: 0000000000000000(0000) GS:ffff8880b9900000(0000) knlGS:0000000000000000

CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033

CR2: 000000002005a000 CR3: 000000000c976000 CR4: 00000000003506e0

DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000
DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400
Call Trace:
<NMI>
</NMI>
<TASK>

__text_poke+0x102/0xc90 arch/x86/kernel/alternative.c:1792
text_poke arch/x86/kernel/alternative.c:1897 [inline]
text_poke_bp_batch+0x190/0x960 arch/x86/kernel/alternative.c:2205
text_poke_flush arch/x86/kernel/alternative.c:2399 [inline]
text_poke_flush arch/x86/kernel/alternative.c:2396 [inline]
text_poke_finish+0x30/0x40 arch/x86/kernel/alternative.c:2406
arch_jump_label_transform_apply+0x1c/0x30 arch/x86/kernel/jump_label.c:146
jump_label_update+0x32e/0x410 kernel/jump_label.c:829
static_key_disable_cpuslocked+0x154/0x1b0 kernel/jump_label.c:235
static_key_disable+0x1a/0x20 kernel/jump_label.c:243
toggle_allocation_gate mm/kfence/core.c:835 [inline]
toggle_allocation_gate+0x13f/0x250 mm/kfence/core.c:822

process_one_work+0x887/0x15d0 kernel/workqueue.c:2630
process_scheduled_works kernel/workqueue.c:2703 [inline]
worker_thread+0x8bb/0x1290 kernel/workqueue.c:2784
kthread+0x33a/0x430 kernel/kthread.c:388
ret_from_fork+0x45/0x80 arch/x86/kernel/process.c:147
ret_from_fork_asm+0x11/0x20 arch/x86/entry/entry_64.S:304
</TASK>

Tested on:

commit: 62693208 Add linux-next specific files for 20230825
git tree: https://git.kernel.org/pub/scm/linux/kernel/git/next/linux-next.git

console output: https://syzkaller.appspot.com/x/log.txt?x=15f67588680000

kernel config: https://syzkaller.appspot.com/x/.config?x=8a8c992a790e5073
dashboard link: https://syzkaller.appspot.com/bug?extid=dd327730db1381d8d2a2
compiler: gcc (Debian 12.2.0-14) 12.2.0, GNU ld (GNU Binutils for Debian) 2.40

patch: https://syzkaller.appspot.com/x/patch.diff?x=10c5d567a80000

[syzbot]

Auto-closing this bug as obsolete.
No recent activity, existing reproducers are no longer triggering the issue.