Re: [syzbot] memory leak in create_io_worker

From: syzbot
Date: Mon Sep 13 2021 - 04:04:39 EST

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In reply to: Zhang, Qiang: "Re: [syzbot] memory leak in create_io_worker"
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syzbot has found a reproducer for the following issue on:

HEAD commit: f306b90c69ce Merge tag 'smp-urgent-2021-09-12' of git://gi..
git tree: upstream
console output: https://syzkaller.appspot.com/x/log.txt?x=14bc2715300000
kernel config: https://syzkaller.appspot.com/x/.config?x=bb1c2ff5ae428ca6
dashboard link: https://syzkaller.appspot.com/bug?extid=65454c239241d3d647da
compiler: gcc (Debian 10.2.1-6) 10.2.1 20210110, GNU ld (GNU Binutils for Debian) 2.35.1
syz repro: https://syzkaller.appspot.com/x/repro.syz?x=171d8963300000
C reproducer: https://syzkaller.appspot.com/x/repro.c?x=15b9ccdd300000

IMPORTANT: if you fix the issue, please add the following tag to the commit:
Reported-by: syzbot+65454c239241d3d647da@xxxxxxxxxxxxxxxxxxxxxxxxx

BUG: memory leak
unreferenced object 0xffff88811953fa80 (size 192):
comm "syz-executor248", pid 6847, jiffies 4294979550 (age 31.120s)
hex dump (first 32 bytes):
01 00 00 00 08 00 00 00 00 00 00 00 00 00 00 00 ................
00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 ................
backtrace:
[<ffffffff8162fbb1>] kmalloc_node include/linux/slab.h:609 [inline]
[<ffffffff8162fbb1>] kzalloc_node include/linux/slab.h:732 [inline]
[<ffffffff8162fbb1>] create_io_worker+0x41/0x1f0 fs/io-wq.c:741
[<ffffffff81630067>] io_wqe_create_worker fs/io-wq.c:267 [inline]
[<ffffffff81630067>] io_wqe_enqueue+0x217/0x3a0 fs/io-wq.c:873
[<ffffffff8161e3a4>] io_queue_async_work+0xc4/0x200 fs/io_uring.c:1473
[<ffffffff8162944c>] __io_queue_sqe+0x34c/0x510 fs/io_uring.c:6940
[<ffffffff8162a6e6>] io_queue_sqe fs/io_uring.c:6958 [inline]
[<ffffffff8162a6e6>] io_submit_sqe fs/io_uring.c:7134 [inline]
[<ffffffff8162a6e6>] io_submit_sqes+0xc36/0x2ec0 fs/io_uring.c:7240
[<ffffffff8162cf6f>] __do_sys_io_uring_enter+0x5ff/0xf80 fs/io_uring.c:9882
[<ffffffff843faa25>] do_syscall_x64 arch/x86/entry/common.c:50 [inline]
[<ffffffff843faa25>] do_syscall_64+0x35/0xb0 arch/x86/entry/common.c:80
[<ffffffff84600068>] entry_SYSCALL_64_after_hwframe+0x44/0xae

BUG: memory leak
unreferenced object 0xffff88811953fa80 (size 192):
comm "syz-executor248", pid 6847, jiffies 4294979550 (age 31.180s)
hex dump (first 32 bytes):
01 00 00 00 08 00 00 00 00 00 00 00 00 00 00 00 ................
00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 ................
backtrace:
[<ffffffff8162fbb1>] kmalloc_node include/linux/slab.h:609 [inline]
[<ffffffff8162fbb1>] kzalloc_node include/linux/slab.h:732 [inline]
[<ffffffff8162fbb1>] create_io_worker+0x41/0x1f0 fs/io-wq.c:741
[<ffffffff81630067>] io_wqe_create_worker fs/io-wq.c:267 [inline]
[<ffffffff81630067>] io_wqe_enqueue+0x217/0x3a0 fs/io-wq.c:873
[<ffffffff8161e3a4>] io_queue_async_work+0xc4/0x200 fs/io_uring.c:1473
[<ffffffff8162944c>] __io_queue_sqe+0x34c/0x510 fs/io_uring.c:6940
[<ffffffff8162a6e6>] io_queue_sqe fs/io_uring.c:6958 [inline]
[<ffffffff8162a6e6>] io_submit_sqe fs/io_uring.c:7134 [inline]
[<ffffffff8162a6e6>] io_submit_sqes+0xc36/0x2ec0 fs/io_uring.c:7240
[<ffffffff8162cf6f>] __do_sys_io_uring_enter+0x5ff/0xf80 fs/io_uring.c:9882
[<ffffffff843faa25>] do_syscall_x64 arch/x86/entry/common.c:50 [inline]
[<ffffffff843faa25>] do_syscall_64+0x35/0xb0 arch/x86/entry/common.c:80
[<ffffffff84600068>] entry_SYSCALL_64_after_hwframe+0x44/0xae

BUG: memory leak
unreferenced object 0xffff88811953fa80 (size 192):
comm "syz-executor248", pid 6847, jiffies 4294979550 (age 31.230s)
hex dump (first 32 bytes):
01 00 00 00 08 00 00 00 00 00 00 00 00 00 00 00 ................
00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 ................
backtrace:
[<ffffffff8162fbb1>] kmalloc_node include/linux/slab.h:609 [inline]
[<ffffffff8162fbb1>] kzalloc_node include/linux/slab.h:732 [inline]
[<ffffffff8162fbb1>] create_io_worker+0x41/0x1f0 fs/io-wq.c:741
[<ffffffff81630067>] io_wqe_create_worker fs/io-wq.c:267 [inline]
[<ffffffff81630067>] io_wqe_enqueue+0x217/0x3a0 fs/io-wq.c:873
[<ffffffff8161e3a4>] io_queue_async_work+0xc4/0x200 fs/io_uring.c:1473
[<ffffffff8162944c>] __io_queue_sqe+0x34c/0x510 fs/io_uring.c:6940
[<ffffffff8162a6e6>] io_queue_sqe fs/io_uring.c:6958 [inline]
[<ffffffff8162a6e6>] io_submit_sqe fs/io_uring.c:7134 [inline]
[<ffffffff8162a6e6>] io_submit_sqes+0xc36/0x2ec0 fs/io_uring.c:7240
[<ffffffff8162cf6f>] __do_sys_io_uring_enter+0x5ff/0xf80 fs/io_uring.c:9882
[<ffffffff843faa25>] do_syscall_x64 arch/x86/entry/common.c:50 [inline]
[<ffffffff843faa25>] do_syscall_64+0x35/0xb0 arch/x86/entry/common.c:80
[<ffffffff84600068>] entry_SYSCALL_64_after_hwframe+0x44/0xae

BUG: memory leak
unreferenced object 0xffff88811953fa80 (size 192):
comm "syz-executor248", pid 6847, jiffies 4294979550 (age 31.290s)
hex dump (first 32 bytes):
01 00 00 00 08 00 00 00 00 00 00 00 00 00 00 00 ................
00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 ................
backtrace:
[<ffffffff8162fbb1>] kmalloc_node include/linux/slab.h:609 [inline]
[<ffffffff8162fbb1>] kzalloc_node include/linux/slab.h:732 [inline]
[<ffffffff8162fbb1>] create_io_worker+0x41/0x1f0 fs/io-wq.c:741
[<ffffffff81630067>] io_wqe_create_worker fs/io-wq.c:267 [inline]
[<ffffffff81630067>] io_wqe_enqueue+0x217/0x3a0 fs/io-wq.c:873
[<ffffffff8161e3a4>] io_queue_async_work+0xc4/0x200 fs/io_uring.c:1473
[<ffffffff8162944c>] __io_queue_sqe+0x34c/0x510 fs/io_uring.c:6940
[<ffffffff8162a6e6>] io_queue_sqe fs/io_uring.c:6958 [inline]
[<ffffffff8162a6e6>] io_submit_sqe fs/io_uring.c:7134 [inline]
[<ffffffff8162a6e6>] io_submit_sqes+0xc36/0x2ec0 fs/io_uring.c:7240
[<ffffffff8162cf6f>] __do_sys_io_uring_enter+0x5ff/0xf80 fs/io_uring.c:9882
[<ffffffff843faa25>] do_syscall_x64 arch/x86/entry/common.c:50 [inline]
[<ffffffff843faa25>] do_syscall_64+0x35/0xb0 arch/x86/entry/common.c:80
[<ffffffff84600068>] entry_SYSCALL_64_after_hwframe+0x44/0xae

BUG: memory leak
unreferenced object 0xffff88811953fa80 (size 192):
comm "syz-executor248", pid 6847, jiffies 4294979550 (age 31.340s)
hex dump (first 32 bytes):
01 00 00 00 08 00 00 00 00 00 00 00 00 00 00 00 ................
00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 ................
backtrace:
[<ffffffff8162fbb1>] kmalloc_node include/linux/slab.h:609 [inline]
[<ffffffff8162fbb1>] kzalloc_node include/linux/slab.h:732 [inline]
[<ffffffff8162fbb1>] create_io_worker+0x41/0x1f0 fs/io-wq.c:741
[<ffffffff81630067>] io_wqe_create_worker fs/io-wq.c:267 [inline]
[<ffffffff81630067>] io_wqe_enqueue+0x217/0x3a0 fs/io-wq.c:873
[<ffffffff8161e3a4>] io_queue_async_work+0xc4/0x200 fs/io_uring.c:1473
[<ffffffff8162944c>] __io_queue_sqe+0x34c/0x510 fs/io_uring.c:6940
[<ffffffff8162a6e6>] io_queue_sqe fs/io_uring.c:6958 [inline]
[<ffffffff8162a6e6>] io_submit_sqe fs/io_uring.c:7134 [inline]
[<ffffffff8162a6e6>] io_submit_sqes+0xc36/0x2ec0 fs/io_uring.c:7240
[<ffffffff8162cf6f>] __do_sys_io_uring_enter+0x5ff/0xf80 fs/io_uring.c:9882
[<ffffffff843faa25>] do_syscall_x64 arch/x86/entry/common.c:50 [inline]
[<ffffffff843faa25>] do_syscall_64+0x35/0xb0 arch/x86/entry/common.c:80
[<ffffffff84600068>] entry_SYSCALL_64_after_hwframe+0x44/0xae

BUG: memory leak
unreferenced object 0xffff88811953fa80 (size 192):
comm "syz-executor248", pid 6847, jiffies 4294979550 (age 31.400s)
hex dump (first 32 bytes):
01 00 00 00 08 00 00 00 00 00 00 00 00 00 00 00 ................
00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 ................
backtrace:
[<ffffffff8162fbb1>] kmalloc_node include/linux/slab.h:609 [inline]
[<ffffffff8162fbb1>] kzalloc_node include/linux/slab.h:732 [inline]
[<ffffffff8162fbb1>] create_io_worker+0x41/0x1f0 fs/io-wq.c:741
[<ffffffff81630067>] io_wqe_create_worker fs/io-wq.c:267 [inline]
[<ffffffff81630067>] io_wqe_enqueue+0x217/0x3a0 fs/io-wq.c:873
[<ffffffff8161e3a4>] io_queue_async_work+0xc4/0x200 fs/io_uring.c:1473
[<ffffffff8162944c>] __io_queue_sqe+0x34c/0x510 fs/io_uring.c:6940
[<ffffffff8162a6e6>] io_queue_sqe fs/io_uring.c:6958 [inline]
[<ffffffff8162a6e6>] io_submit_sqe fs/io_uring.c:7134 [inline]
[<ffffffff8162a6e6>] io_submit_sqes+0xc36/0x2ec0 fs/io_uring.c:7240
[<ffffffff8162cf6f>] __do_sys_io_uring_enter+0x5ff/0xf80 fs/io_uring.c:9882
[<ffffffff843faa25>] do_syscall_x64 arch/x86/entry/common.c:50 [inline]
[<ffffffff843faa25>] do_syscall_64+0x35/0xb0 arch/x86/entry/common.c:80
[<ffffffff84600068>] entry_SYSCALL_64_after_hwframe+0x44/0xae

BUG: memory leak
unreferenced object 0xffff88811953fa80 (size 192):
comm "syz-executor248", pid 6847, jiffies 4294979550 (age 31.450s)
hex dump (first 32 bytes):
01 00 00 00 08 00 00 00 00 00 00 00 00 00 00 00 ................
00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 ................
backtrace:
[<ffffffff8162fbb1>] kmalloc_node include/linux/slab.h:609 [inline]
[<ffffffff8162fbb1>] kzalloc_node include/linux/slab.h:732 [inline]
[<ffffffff8162fbb1>] create_io_worker+0x41/0x1f0 fs/io-wq.c:741
[<ffffffff81630067>] io_wqe_create_worker fs/io-wq.c:267 [inline]
[<ffffffff81630067>] io_wqe_enqueue+0x217/0x3a0 fs/io-wq.c:873
[<ffffffff8161e3a4>] io_queue_async_work+0xc4/0x200 fs/io_uring.c:1473
[<ffffffff8162944c>] __io_queue_sqe+0x34c/0x510 fs/io_uring.c:6940
[<ffffffff8162a6e6>] io_queue_sqe fs/io_uring.c:6958 [inline]
[<ffffffff8162a6e6>] io_submit_sqe fs/io_uring.c:7134 [inline]
[<ffffffff8162a6e6>] io_submit_sqes+0xc36/0x2ec0 fs/io_uring.c:7240
[<ffffffff8162cf6f>] __do_sys_io_uring_enter+0x5ff/0xf80 fs/io_uring.c:9882
[<ffffffff843faa25>] do_syscall_x64 arch/x86/entry/common.c:50 [inline]
[<ffffffff843faa25>] do_syscall_64+0x35/0xb0 arch/x86/entry/common.c:80
[<ffffffff84600068>] entry_SYSCALL_64_after_hwframe+0x44/0xae

BUG: memory leak
unreferenced object 0xffff88811953fa80 (size 192):
comm "syz-executor248", pid 6847, jiffies 4294979550 (age 31.500s)
hex dump (first 32 bytes):
01 00 00 00 08 00 00 00 00 00 00 00 00 00 00 00 ................
00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 ................
backtrace:
[<ffffffff8162fbb1>] kmalloc_node include/linux/slab.h:609 [inline]
[<ffffffff8162fbb1>] kzalloc_node include/linux/slab.h:732 [inline]
[<ffffffff8162fbb1>] create_io_worker+0x41/0x1f0 fs/io-wq.c:741
[<ffffffff81630067>] io_wqe_create_worker fs/io-wq.c:267 [inline]
[<ffffffff81630067>] io_wqe_enqueue+0x217/0x3a0 fs/io-wq.c:873
[<ffffffff8161e3a4>] io_queue_async_work+0xc4/0x200 fs/io_uring.c:1473
[<ffffffff8162944c>] __io_queue_sqe+0x34c/0x510 fs/io_uring.c:6940
[<ffffffff8162a6e6>] io_queue_sqe fs/io_uring.c:6958 [inline]
[<ffffffff8162a6e6>] io_submit_sqe fs/io_uring.c:7134 [inline]
[<ffffffff8162a6e6>] io_submit_sqes+0xc36/0x2ec0 fs/io_uring.c:7240
[<ffffffff8162cf6f>] __do_sys_io_uring_enter+0x5ff/0xf80 fs/io_uring.c:9882
[<ffffffff843faa25>] do_syscall_x64 arch/x86/entry/common.c:50 [inline]
[<ffffffff843faa25>] do_syscall_64+0x35/0xb0 arch/x86/entry/common.c:80
[<ffffffff84600068>] entry_SYSCALL_64_after_hwframe+0x44/0xae

write to /proc/sys/kernel/hung_task_check_interval_secs failed: No such file or directory
write to /proc/sys/kernel/softlockup_all_cpu_backtrace failed: No such file or directory
write to /proc/sys/kernel/hung_task_check_interval_secs failed: No such file or directory
write to /proc/sys/kernel/softlockup_all_cpu_backtrace failed: No such file or directory
write to /proc/sys/kernel/hung_task_check_interval_secs failed: No such file or directory
write to /proc/sys/kernel/softlockup_all_cpu_backtrace failed: No such file or directory
write to /proc/sys/kernel/hung_task_check_interval_secs failed: No such file or directory
write to /proc/sys/kernel/softlockup_all_cpu_backtrace failed: No such file or directory
write to /proc/sys/kernel/hung_task_check_interval_secs failed: No such file or directory
write to /proc/sys/kernel/softlockup_all_cpu_backtrace failed: No such file or directory
write to /proc/sys/kernel/hung_task_check_interval_secs failed: No such file or directory
write to /proc/sys/kernel/softlockup_all_cpu_backtrace failed: No such file or directory
write to /proc/sys/kernel/hung_task_check_interval_secs failed: No such file or directory
write to /proc/sys/kernel/softlockup_all_cpu_backtrace failed: No such file or directory
write to /proc/sys/kernel/hung_task_check_interval_secs failed: No such file or directory
write to /proc/sys/kernel/softlockup_all_cpu_backtrace failed: No such file or directory

Next message: Neil Armstrong: "[PATCH] mmc: meson-gx: do not use memcpy_to/fromio for dram-access-quirk"
Previous message: Roan van Dijk: "[PATCH v2 3/4] drivers: iio: chemical: Add support for Sensirion SCD4x CO2 sensor"
In reply to: Zhang, Qiang: "Re: [syzbot] memory leak in create_io_worker"
Messages sorted by: [ date ] [ thread ] [ subject ] [ author ]