memory leak in binder_transaction (2)

memory leak in binder_transaction (2)

Status: upstream: reported C repro on 2022/11/20 21:51
Subsystems: kernel
[Documentation on labels]
Reported-by: syzbot+7f10c1653e35933c0f1e@syzkaller.appspotmail.com
Fix commit: 1aa3aaf8953c binder: fix memory leaks of spam and pending work
Patched on: [ci-qemu-upstream ci-qemu-upstream-386 ci-qemu2-arm32 ci-qemu2-arm64 ci-qemu2-arm64-compat ci-qemu2-arm64-mte ci-upstream-bpf-kasan-gce ci-upstream-bpf-next-kasan-gce ci-upstream-gce-arm64 ci-upstream-gce-leak ci-upstream-kasan-badwrites-root ci-upstream-kasan-gce ci-upstream-kasan-gce-386 ci-upstream-kasan-gce-root ci-upstream-kasan-gce-selinux-root ci-upstream-kasan-gce-smack-root ci-upstream-kmsan-gce ci-upstream-kmsan-gce-386 ci-upstream-linux-next-kasan-gce-root ci-upstream-net-kasan-gce ci-upstream-net-this-kasan-gce ci2-upstream-fs ci2-upstream-kcsan-gce ci2-upstream-usb], missing on: [ci-qemu2-riscv64]
First crash: 385d, last: 86d

▶ ▼ Discussions (2)

Title	Replies (including bot)	Last reply
[PATCH] binder: fix memory leak of spamming work	4 (4)	2023/09/25 18:46
[syzbot] memory leak in binder_transaction (2)	0 (2)	2023/09/11 20:56

▶ ▼ Similar bugs (1)

Kernel	Title	Repro	Cause bisect	Fix bisect	Count	Last	Reported	Patched	Status
upstream	memory leak in binder_transaction kernel	C			3	1624d	1637d	13/25	fixed on 2019/08/05 13:45

▶ ▼ Last patch testing requests (5)


Created	Duration	User	Patch	Repo	Result
2023/09/25 21:00	10m	retest repro		upstream	report log
2023/09/05 06:07	18m	retest repro		upstream	report log
2023/06/27 04:10	15m	retest repro		upstream	report log
2023/04/18 03:40	14m	retest repro		upstream	report log
2022/11/21 01:58	14m	hdanton@sina.com	patch	https://git.kernel.org/pub/scm/linux/kernel/git/torvalds/linux.git 59d0d52c30d4	log

Sample crash report:

BUG: memory leak
unreferenced object 0xffff88810e2d6de0 (size 32):
  comm "syz-executor338", pid 5046, jiffies 4294968230 (age 13.590s)
  hex dump (first 32 bytes):
    e0 6d 2d 0e 81 88 ff ff e0 6d 2d 0e 81 88 ff ff  .m-......m-.....
    04 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00  ................
  backtrace:
    [<ffffffff81573b75>] kmalloc_trace+0x25/0x90 mm/slab_common.c:1114
    [<ffffffff83d41873>] kmalloc include/linux/slab.h:599 [inline]
    [<ffffffff83d41873>] kzalloc include/linux/slab.h:720 [inline]
    [<ffffffff83d41873>] binder_transaction+0x573/0x4050 drivers/android/binder.c:3152
    [<ffffffff83d45a05>] binder_thread_write+0x6b5/0x1860 drivers/android/binder.c:4010
    [<ffffffff83d486dc>] binder_ioctl_write_read drivers/android/binder.c:5066 [inline]
    [<ffffffff83d486dc>] binder_ioctl+0x1b2c/0x3cf0 drivers/android/binder.c:5352
    [<ffffffff816b25f2>] vfs_ioctl fs/ioctl.c:51 [inline]
    [<ffffffff816b25f2>] __do_sys_ioctl fs/ioctl.c:871 [inline]
    [<ffffffff816b25f2>] __se_sys_ioctl fs/ioctl.c:857 [inline]
    [<ffffffff816b25f2>] __x64_sys_ioctl+0xf2/0x140 fs/ioctl.c:857
    [<ffffffff84b30008>] do_syscall_x64 arch/x86/entry/common.c:50 [inline]
    [<ffffffff84b30008>] do_syscall_64+0x38/0xb0 arch/x86/entry/common.c:80
    [<ffffffff84c0008b>] entry_SYSCALL_64_after_hwframe+0x63/0xcd

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

Crashes (2):
Time	Kernel	Commit	Syzkaller	Config	Log	Report	Syz repro	C repro	VM info	Assets (help?)	Manager	Title
2023/09/11 20:54	upstream	0bb80ecc33a8	59da8366	.config	console log	report	syz	C		[disk image] [vmlinux] [kernel image]	ci-upstream-gce-leak	memory leak in binder_transaction
2022/11/16 21:43	upstream	59d0d52c30d4	3a127a31	.config	console log	report	syz			[disk image] [vmlinux] [kernel image]	ci-upstream-gce-leak	memory leak in binder_transaction

* ~~Struck through~~ repros no longer work on HEAD.