Re: [syzbot] memory leak in kobject_set_name_vargs (5)

From: syzbot
Date: Thu Aug 04 2022 - 18:00:37 EST

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syzbot has found a reproducer for the following issue on:

HEAD commit: b44f2fd87919 Merge tag 'drm-next-2022-08-03' of git://anon..
git tree: upstream
console output: https://syzkaller.appspot.com/x/log.txt?x=105fdbca080000
kernel config: https://syzkaller.appspot.com/x/.config?x=358668a360d9b702
dashboard link: https://syzkaller.appspot.com/bug?extid=7381dc4ad60658ca4c05
compiler: gcc (Debian 10.2.1-6) 10.2.1 20210110, GNU ld (GNU Binutils for Debian) 2.35.2
syz repro: https://syzkaller.appspot.com/x/repro.syz?x=11c685ca080000
C reproducer: https://syzkaller.appspot.com/x/repro.c?x=120a0fe2080000

IMPORTANT: if you fix the issue, please add the following tag to the commit:
Reported-by: syzbot+7381dc4ad60658ca4c05@xxxxxxxxxxxxxxxxxxxxxxxxx

BUG: memory leak
unreferenced object 0xffff88810c35db80 (size 32):
comm "syz-executor261", pid 3645, jiffies 4294950822 (age 25.990s)
hex dump (first 32 bytes):
6c 6f 6f 70 37 00 00 00 00 00 00 00 00 00 00 00 loop7...........
00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 ................
backtrace:
[<ffffffff814bf836>] kstrdup+0x36/0x70 mm/util.c:61
[<ffffffff814bf8c3>] kstrdup_const+0x53/0x80 mm/util.c:84
[<ffffffff8239c002>] kvasprintf_const+0xc2/0x110 lib/kasprintf.c:48
[<ffffffff82492b6b>] kobject_set_name_vargs+0x3b/0xe0 lib/kobject.c:257
[<ffffffff82492fed>] kobject_add_varg lib/kobject.c:352 [inline]
[<ffffffff82492fed>] kobject_init_and_add+0x6d/0xc0 lib/kobject.c:441
[<ffffffff81e10e8a>] nilfs_sysfs_create_device_group+0x9a/0x3d0 fs/nilfs2/sysfs.c:991
[<ffffffff81df964c>] init_nilfs+0x51c/0x680 fs/nilfs2/the_nilfs.c:637
[<ffffffff81de57ab>] nilfs_fill_super fs/nilfs2/super.c:1047 [inline]
[<ffffffff81de57ab>] nilfs_mount+0x51b/0x890 fs/nilfs2/super.c:1317
[<ffffffff8164981b>] legacy_get_tree+0x2b/0x90 fs/fs_context.c:610
[<ffffffff815e2c68>] vfs_get_tree+0x28/0x100 fs/super.c:1497
[<ffffffff81626e27>] do_new_mount fs/namespace.c:3040 [inline]
[<ffffffff81626e27>] path_mount+0xc37/0x1120 fs/namespace.c:3370
[<ffffffff81627a5e>] do_mount fs/namespace.c:3383 [inline]
[<ffffffff81627a5e>] __do_sys_mount fs/namespace.c:3591 [inline]
[<ffffffff81627a5e>] __se_sys_mount fs/namespace.c:3568 [inline]
[<ffffffff81627a5e>] __x64_sys_mount+0x18e/0x1d0 fs/namespace.c:3568
[<ffffffff845cad15>] do_syscall_x64 arch/x86/entry/common.c:50 [inline]
[<ffffffff845cad15>] do_syscall_64+0x35/0xb0 arch/x86/entry/common.c:80
[<ffffffff84600087>] entry_SYSCALL_64_after_hwframe+0x63/0xcd

BUG: memory leak
unreferenced object 0xffff88810c35db80 (size 32):
comm "syz-executor261", pid 3645, jiffies 4294950822 (age 27.260s)
hex dump (first 32 bytes):
6c 6f 6f 70 37 00 00 00 00 00 00 00 00 00 00 00 loop7...........
00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 ................
backtrace:
[<ffffffff814bf836>] kstrdup+0x36/0x70 mm/util.c:61
[<ffffffff814bf8c3>] kstrdup_const+0x53/0x80 mm/util.c:84
[<ffffffff8239c002>] kvasprintf_const+0xc2/0x110 lib/kasprintf.c:48
[<ffffffff82492b6b>] kobject_set_name_vargs+0x3b/0xe0 lib/kobject.c:257
[<ffffffff82492fed>] kobject_add_varg lib/kobject.c:352 [inline]
[<ffffffff82492fed>] kobject_init_and_add+0x6d/0xc0 lib/kobject.c:441
[<ffffffff81e10e8a>] nilfs_sysfs_create_device_group+0x9a/0x3d0 fs/nilfs2/sysfs.c:991
[<ffffffff81df964c>] init_nilfs+0x51c/0x680 fs/nilfs2/the_nilfs.c:637
[<ffffffff81de57ab>] nilfs_fill_super fs/nilfs2/super.c:1047 [inline]
[<ffffffff81de57ab>] nilfs_mount+0x51b/0x890 fs/nilfs2/super.c:1317
[<ffffffff8164981b>] legacy_get_tree+0x2b/0x90 fs/fs_context.c:610
[<ffffffff815e2c68>] vfs_get_tree+0x28/0x100 fs/super.c:1497
[<ffffffff81626e27>] do_new_mount fs/namespace.c:3040 [inline]
[<ffffffff81626e27>] path_mount+0xc37/0x1120 fs/namespace.c:3370
[<ffffffff81627a5e>] do_mount fs/namespace.c:3383 [inline]
[<ffffffff81627a5e>] __do_sys_mount fs/namespace.c:3591 [inline]
[<ffffffff81627a5e>] __se_sys_mount fs/namespace.c:3568 [inline]
[<ffffffff81627a5e>] __x64_sys_mount+0x18e/0x1d0 fs/namespace.c:3568
[<ffffffff845cad15>] do_syscall_x64 arch/x86/entry/common.c:50 [inline]
[<ffffffff845cad15>] do_syscall_64+0x35/0xb0 arch/x86/entry/common.c:80
[<ffffffff84600087>] entry_SYSCALL_64_after_hwframe+0x63/0xcd

BUG: memory leak
unreferenced object 0xffff88810c35db80 (size 32):
comm "syz-executor261", pid 3645, jiffies 4294950822 (age 28.520s)
hex dump (first 32 bytes):
6c 6f 6f 70 37 00 00 00 00 00 00 00 00 00 00 00 loop7...........
00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 ................
backtrace:
[<ffffffff814bf836>] kstrdup+0x36/0x70 mm/util.c:61
[<ffffffff814bf8c3>] kstrdup_const+0x53/0x80 mm/util.c:84
[<ffffffff8239c002>] kvasprintf_const+0xc2/0x110 lib/kasprintf.c:48
[<ffffffff82492b6b>] kobject_set_name_vargs+0x3b/0xe0 lib/kobject.c:257
[<ffffffff82492fed>] kobject_add_varg lib/kobject.c:352 [inline]
[<ffffffff82492fed>] kobject_init_and_add+0x6d/0xc0 lib/kobject.c:441
[<ffffffff81e10e8a>] nilfs_sysfs_create_device_group+0x9a/0x3d0 fs/nilfs2/sysfs.c:991
[<ffffffff81df964c>] init_nilfs+0x51c/0x680 fs/nilfs2/the_nilfs.c:637
[<ffffffff81de57ab>] nilfs_fill_super fs/nilfs2/super.c:1047 [inline]
[<ffffffff81de57ab>] nilfs_mount+0x51b/0x890 fs/nilfs2/super.c:1317
[<ffffffff8164981b>] legacy_get_tree+0x2b/0x90 fs/fs_context.c:610
[<ffffffff815e2c68>] vfs_get_tree+0x28/0x100 fs/super.c:1497
[<ffffffff81626e27>] do_new_mount fs/namespace.c:3040 [inline]
[<ffffffff81626e27>] path_mount+0xc37/0x1120 fs/namespace.c:3370
[<ffffffff81627a5e>] do_mount fs/namespace.c:3383 [inline]
[<ffffffff81627a5e>] __do_sys_mount fs/namespace.c:3591 [inline]
[<ffffffff81627a5e>] __se_sys_mount fs/namespace.c:3568 [inline]
[<ffffffff81627a5e>] __x64_sys_mount+0x18e/0x1d0 fs/namespace.c:3568
[<ffffffff845cad15>] do_syscall_x64 arch/x86/entry/common.c:50 [inline]
[<ffffffff845cad15>] do_syscall_64+0x35/0xb0 arch/x86/entry/common.c:80
[<ffffffff84600087>] entry_SYSCALL_64_after_hwframe+0x63/0xcd

BUG: memory leak
unreferenced object 0xffff88810c35db80 (size 32):
comm "syz-executor261", pid 3645, jiffies 4294950822 (age 31.000s)
hex dump (first 32 bytes):
6c 6f 6f 70 37 00 00 00 00 00 00 00 00 00 00 00 loop7...........
00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 ................
backtrace:
[<ffffffff814bf836>] kstrdup+0x36/0x70 mm/util.c:61
[<ffffffff814bf8c3>] kstrdup_const+0x53/0x80 mm/util.c:84
[<ffffffff8239c002>] kvasprintf_const+0xc2/0x110 lib/kasprintf.c:48
[<ffffffff82492b6b>] kobject_set_name_vargs+0x3b/0xe0 lib/kobject.c:257
[<ffffffff82492fed>] kobject_add_varg lib/kobject.c:352 [inline]
[<ffffffff82492fed>] kobject_init_and_add+0x6d/0xc0 lib/kobject.c:441
[<ffffffff81e10e8a>] nilfs_sysfs_create_device_group+0x9a/0x3d0 fs/nilfs2/sysfs.c:991
[<ffffffff81df964c>] init_nilfs+0x51c/0x680 fs/nilfs2/the_nilfs.c:637
[<ffffffff81de57ab>] nilfs_fill_super fs/nilfs2/super.c:1047 [inline]
[<ffffffff81de57ab>] nilfs_mount+0x51b/0x890 fs/nilfs2/super.c:1317
[<ffffffff8164981b>] legacy_get_tree+0x2b/0x90 fs/fs_context.c:610
[<ffffffff815e2c68>] vfs_get_tree+0x28/0x100 fs/super.c:1497
[<ffffffff81626e27>] do_new_mount fs/namespace.c:3040 [inline]
[<ffffffff81626e27>] path_mount+0xc37/0x1120 fs/namespace.c:3370
[<ffffffff81627a5e>] do_mount fs/namespace.c:3383 [inline]
[<ffffffff81627a5e>] __do_sys_mount fs/namespace.c:3591 [inline]
[<ffffffff81627a5e>] __se_sys_mount fs/namespace.c:3568 [inline]
[<ffffffff81627a5e>] __x64_sys_mount+0x18e/0x1d0 fs/namespace.c:3568
[<ffffffff845cad15>] do_syscall_x64 arch/x86/entry/common.c:50 [inline]
[<ffffffff845cad15>] do_syscall_64+0x35/0xb0 arch/x86/entry/common.c:80
[<ffffffff84600087>] entry_SYSCALL_64_after_hwframe+0x63/0xcd

BUG: memory leak
unreferenced object 0xffff88810c35db80 (size 32):
comm "syz-executor261", pid 3645, jiffies 4294950822 (age 31.040s)
hex dump (first 32 bytes):
6c 6f 6f 70 37 00 00 00 00 00 00 00 00 00 00 00 loop7...........
00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 ................
backtrace:
[<ffffffff814bf836>] kstrdup+0x36/0x70 mm/util.c:61
[<ffffffff814bf8c3>] kstrdup_const+0x53/0x80 mm/util.c:84
[<ffffffff8239c002>] kvasprintf_const+0xc2/0x110 lib/kasprintf.c:48
[<ffffffff82492b6b>] kobject_set_name_vargs+0x3b/0xe0 lib/kobject.c:257
[<ffffffff82492fed>] kobject_add_varg lib/kobject.c:352 [inline]
[<ffffffff82492fed>] kobject_init_and_add+0x6d/0xc0 lib/kobject.c:441
[<ffffffff81e10e8a>] nilfs_sysfs_create_device_group+0x9a/0x3d0 fs/nilfs2/sysfs.c:991
[<ffffffff81df964c>] init_nilfs+0x51c/0x680 fs/nilfs2/the_nilfs.c:637
[<ffffffff81de57ab>] nilfs_fill_super fs/nilfs2/super.c:1047 [inline]
[<ffffffff81de57ab>] nilfs_mount+0x51b/0x890 fs/nilfs2/super.c:1317
[<ffffffff8164981b>] legacy_get_tree+0x2b/0x90 fs/fs_context.c:610
[<ffffffff815e2c68>] vfs_get_tree+0x28/0x100 fs/super.c:1497
[<ffffffff81626e27>] do_new_mount fs/namespace.c:3040 [inline]
[<ffffffff81626e27>] path_mount+0xc37/0x1120 fs/namespace.c:3370
[<ffffffff81627a5e>] do_mount fs/namespace.c:3383 [inline]
[<ffffffff81627a5e>] __do_sys_mount fs/namespace.c:3591 [inline]
[<ffffffff81627a5e>] __se_sys_mount fs/namespace.c:3568 [inline]
[<ffffffff81627a5e>] __x64_sys_mount+0x18e/0x1d0 fs/namespace.c:3568
[<ffffffff845cad15>] do_syscall_x64 arch/x86/entry/common.c:50 [inline]
[<ffffffff845cad15>] do_syscall_64+0x35/0xb0 arch/x86/entry/common.c:80
[<ffffffff84600087>] entry_SYSCALL_64_after_hwframe+0x63/0xcd

BUG: memory leak
unreferenced object 0xffff88810c35db80 (size 32):
comm "syz-executor261", pid 3645, jiffies 4294950822 (age 31.080s)
hex dump (first 32 bytes):
6c 6f 6f 70 37 00 00 00 00 00 00 00 00 00 00 00 loop7...........
00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 ................
backtrace:
[<ffffffff814bf836>] kstrdup+0x36/0x70 mm/util.c:61
[<ffffffff814bf8c3>] kstrdup_const+0x53/0x80 mm/util.c:84
[<ffffffff8239c002>] kvasprintf_const+0xc2/0x110 lib/kasprintf.c:48
[<ffffffff82492b6b>] kobject_set_name_vargs+0x3b/0xe0 lib/kobject.c:257
[<ffffffff82492fed>] kobject_add_varg lib/kobject.c:352 [inline]
[<ffffffff82492fed>] kobject_init_and_add+0x6d/0xc0 lib/kobject.c:441
[<ffffffff81e10e8a>] nilfs_sysfs_create_device_group+0x9a/0x3d0 fs/nilfs2/sysfs.c:991
[<ffffffff81df964c>] init_nilfs+0x51c/0x680 fs/nilfs2/the_nilfs.c:637
[<ffffffff81de57ab>] nilfs_fill_super fs/nilfs2/super.c:1047 [inline]
[<ffffffff81de57ab>] nilfs_mount+0x51b/0x890 fs/nilfs2/super.c:1317
[<ffffffff8164981b>] legacy_get_tree+0x2b/0x90 fs/fs_context.c:610
[<ffffffff815e2c68>] vfs_get_tree+0x28/0x100 fs/super.c:1497
[<ffffffff81626e27>] do_new_mount fs/namespace.c:3040 [inline]
[<ffffffff81626e27>] path_mount+0xc37/0x1120 fs/namespace.c:3370
[<ffffffff81627a5e>] do_mount fs/namespace.c:3383 [inline]
[<ffffffff81627a5e>] __do_sys_mount fs/namespace.c:3591 [inline]
[<ffffffff81627a5e>] __se_sys_mount fs/namespace.c:3568 [inline]
[<ffffffff81627a5e>] __x64_sys_mount+0x18e/0x1d0 fs/namespace.c:3568
[<ffffffff845cad15>] do_syscall_x64 arch/x86/entry/common.c:50 [inline]
[<ffffffff845cad15>] do_syscall_64+0x35/0xb0 arch/x86/entry/common.c:80
[<ffffffff84600087>] 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
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
executing program
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
executing program
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: Evan Green: "Re: [PATCH 00/10] Encrypted Hibernation"
Previous message: Linus Torvalds: "Re: mainline build failure for x86_64 allmodconfig with clang"
Messages sorted by: [ date ] [ thread ] [ subject ] [ author ]