Hello, When I am running the following program in a parallel loop, kmemleak starts reporting memory leaks of objects allocated in tty_register_driver during boot. These leaks start popping up chaotically and as you can see they originate in different drivers (synclinkmp_init, isdn_init, chr_dev_init, sysfs_init).
On commit 388f7b1d6e8ca06762e2454d28d6c3c55ad0fe95 (4.5-rc3). // autogenerated by syzkaller (http://github.com/google/syzkaller) #include <sys/types.h> #include <sys/stat.h> #include <fcntl.h> #include <sys/ioctl.h> int main() { int fd, val; fd = open("/dev/ptmx", O_RDWR); val = 21; ioctl(fd, TIOCSETD, &val); return 0; } unreferenced object 0xffff88006708dc20 (size 8): comm "swapper/0", pid 1, jiffies 4294672590 (age 930.839s) hex dump (first 8 bytes): 74 74 79 53 4c 4d 38 00 ttySLM8. backtrace: [<ffffffff81765d10>] __kmalloc_track_caller+0x1b0/0x320 mm/slub.c:4068 [<ffffffff816b37a9>] kstrdup+0x39/0x70 mm/util.c:53 [<ffffffff816b3826>] kstrdup_const+0x46/0x60 mm/util.c:74 [<ffffffff8194e5bb>] __kernfs_new_node+0x2b/0x2b0 fs/kernfs/dir.c:536 [<ffffffff81951c70>] kernfs_new_node+0x80/0xe0 fs/kernfs/dir.c:572 [<ffffffff81957223>] kernfs_create_link+0x33/0x150 fs/kernfs/symlink.c:32 [<ffffffff81959c4b>] sysfs_do_create_link_sd.isra.2+0x8b/0x120 fs/sysfs/symlink.c:44 [< inline >] sysfs_do_create_link fs/sysfs/symlink.c:80 [<ffffffff81959d45>] sysfs_create_link+0x65/0xc0 fs/sysfs/symlink.c:92 [< inline >] device_add_class_symlinks drivers/base/core.c:891 [<ffffffff835897fc>] device_add+0x73c/0x1480 drivers/base/core.c:1086 [<ffffffff8358a55d>] device_register+0x1d/0x20 drivers/base/core.c:1189 [<ffffffff82f80b50>] tty_register_device_attr+0x320/0x760 drivers/tty/tty_io.c:3312 [< inline >] tty_register_device drivers/tty/tty_io.c:3239 [<ffffffff82f8133b>] tty_register_driver+0x36b/0x670 drivers/tty/tty_io.c:3504 [<ffffffff889babcb>] synclinkmp_init+0x35a/0x40e drivers/tty/synclinkmp.c:3992 [<ffffffff81002259>] do_one_initcall+0x159/0x380 init/main.c:794 [< inline >] do_initcall_level init/main.c:859 [< inline >] do_initcalls init/main.c:867 [< inline >] do_basic_setup init/main.c:885 [<ffffffff888fcc29>] kernel_init_freeable+0x474/0x52d init/main.c:1010 unreferenced object 0xffff88006709b330 (size 152): comm "swapper/0", pid 1, jiffies 4294672590 (age 930.839s) hex dump (first 32 bytes): 01 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 00 00 00 00 ................ backtrace: [<ffffffff81761ba3>] kmem_cache_alloc+0x153/0x2e0 mm/slub.c:2609 [< inline >] kmem_cache_zalloc include/linux/slab.h:597 [<ffffffff8194e5fc>] __kernfs_new_node+0x6c/0x2b0 fs/kernfs/dir.c:540 [<ffffffff81951c70>] kernfs_new_node+0x80/0xe0 fs/kernfs/dir.c:572 [<ffffffff81957223>] kernfs_create_link+0x33/0x150 fs/kernfs/symlink.c:32 [<ffffffff81959c4b>] sysfs_do_create_link_sd.isra.2+0x8b/0x120 fs/sysfs/symlink.c:44 [< inline >] sysfs_do_create_link fs/sysfs/symlink.c:80 [<ffffffff81959d45>] sysfs_create_link+0x65/0xc0 fs/sysfs/symlink.c:92 [< inline >] device_add_class_symlinks drivers/base/core.c:891 [<ffffffff835897fc>] device_add+0x73c/0x1480 drivers/base/core.c:1086 [<ffffffff8358a55d>] device_register+0x1d/0x20 drivers/base/core.c:1189 [<ffffffff82f80b50>] tty_register_device_attr+0x320/0x760 drivers/tty/tty_io.c:3312 [< inline >] tty_register_device drivers/tty/tty_io.c:3239 [<ffffffff82f8133b>] tty_register_driver+0x36b/0x670 drivers/tty/tty_io.c:3504 [<ffffffff889babcb>] synclinkmp_init+0x35a/0x40e drivers/tty/synclinkmp.c:3992 [<ffffffff81002259>] do_one_initcall+0x159/0x380 init/main.c:794 [< inline >] do_initcall_level init/main.c:859 [< inline >] do_initcalls init/main.c:867 [< inline >] do_basic_setup init/main.c:885 [<ffffffff888fcc29>] kernel_init_freeable+0x474/0x52d init/main.c:1010 [<ffffffff8663ca33>] kernel_init+0x13/0x150 init/main.c:936 [<ffffffff866617af>] ret_from_fork+0x3f/0x70 arch/x86/entry/entry_64.S:468 unreferenced object 0xffff88006708d860 (size 8): comm "swapper/0", pid 1, jiffies 4294672591 (age 930.838s) hex dump (first 8 bytes): 74 74 79 53 4c 4d 39 00 ttySLM9. backtrace: [<ffffffff81765d10>] __kmalloc_track_caller+0x1b0/0x320 mm/slub.c:4068 [<ffffffff816b37a9>] kstrdup+0x39/0x70 mm/util.c:53 [<ffffffff816b3826>] kstrdup_const+0x46/0x60 mm/util.c:74 [<ffffffff8194e5bb>] __kernfs_new_node+0x2b/0x2b0 fs/kernfs/dir.c:536 [<ffffffff81951c70>] kernfs_new_node+0x80/0xe0 fs/kernfs/dir.c:572 [<ffffffff81957223>] kernfs_create_link+0x33/0x150 fs/kernfs/symlink.c:32 [<ffffffff81959c4b>] sysfs_do_create_link_sd.isra.2+0x8b/0x120 fs/sysfs/symlink.c:44 [< inline >] sysfs_do_create_link fs/sysfs/symlink.c:80 [<ffffffff81959d45>] sysfs_create_link+0x65/0xc0 fs/sysfs/symlink.c:92 [< inline >] device_add_class_symlinks drivers/base/core.c:891 [<ffffffff835897fc>] device_add+0x73c/0x1480 drivers/base/core.c:1086 [<ffffffff8358a55d>] device_register+0x1d/0x20 drivers/base/core.c:1189 [<ffffffff82f80b50>] tty_register_device_attr+0x320/0x760 drivers/tty/tty_io.c:3312 [< inline >] tty_register_device drivers/tty/tty_io.c:3239 [<ffffffff82f8133b>] tty_register_driver+0x36b/0x670 drivers/tty/tty_io.c:3504 [<ffffffff889babcb>] synclinkmp_init+0x35a/0x40e drivers/tty/synclinkmp.c:3992 [<ffffffff81002259>] do_one_initcall+0x159/0x380 init/main.c:794 [< inline >] do_initcall_level init/main.c:859 [< inline >] do_initcalls init/main.c:867 [< inline >] do_basic_setup init/main.c:885 [<ffffffff888fcc29>] kernel_init_freeable+0x474/0x52d init/main.c:1010 unreferenced object 0xffff88006709a490 (size 152): comm "swapper/0", pid 1, jiffies 4294672591 (age 930.853s) hex dump (first 32 bytes): 01 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 00 00 00 00 ................ backtrace: [<ffffffff81761ba3>] kmem_cache_alloc+0x153/0x2e0 mm/slub.c:2609 [< inline >] kmem_cache_zalloc include/linux/slab.h:597 [<ffffffff8194e5fc>] __kernfs_new_node+0x6c/0x2b0 fs/kernfs/dir.c:540 [<ffffffff81951c70>] kernfs_new_node+0x80/0xe0 fs/kernfs/dir.c:572 [<ffffffff81957223>] kernfs_create_link+0x33/0x150 fs/kernfs/symlink.c:32 [<ffffffff81959c4b>] sysfs_do_create_link_sd.isra.2+0x8b/0x120 fs/sysfs/symlink.c:44 [< inline >] sysfs_do_create_link fs/sysfs/symlink.c:80 [<ffffffff81959d45>] sysfs_create_link+0x65/0xc0 fs/sysfs/symlink.c:92 [< inline >] device_add_class_symlinks drivers/base/core.c:891 [<ffffffff835897fc>] device_add+0x73c/0x1480 drivers/base/core.c:1086 [<ffffffff8358a55d>] device_register+0x1d/0x20 drivers/base/core.c:1189 [<ffffffff82f80b50>] tty_register_device_attr+0x320/0x760 drivers/tty/tty_io.c:3312 [< inline >] tty_register_device drivers/tty/tty_io.c:3239 [<ffffffff82f8133b>] tty_register_driver+0x36b/0x670 drivers/tty/tty_io.c:3504 [<ffffffff889babcb>] synclinkmp_init+0x35a/0x40e drivers/tty/synclinkmp.c:3992 [<ffffffff81002259>] do_one_initcall+0x159/0x380 init/main.c:794 [< inline >] do_initcall_level init/main.c:859 [< inline >] do_initcalls init/main.c:867 [< inline >] do_basic_setup init/main.c:885 [<ffffffff888fcc29>] kernel_init_freeable+0x474/0x52d init/main.c:1010 [<ffffffff8663ca33>] kernel_init+0x13/0x150 init/main.c:936 [<ffffffff866617af>] ret_from_fork+0x3f/0x70 arch/x86/entry/entry_64.S:468 unreferenced object 0xffff880064f3c960 (size 8): comm "swapper/0", pid 1, jiffies 4294674404 (age 929.065s) hex dump (first 8 bytes): 74 74 79 49 31 30 00 ff ttyI10.. backtrace: [<ffffffff81765d10>] __kmalloc_track_caller+0x1b0/0x320 mm/slub.c:4068 [<ffffffff816b37a9>] kstrdup+0x39/0x70 mm/util.c:53 [<ffffffff816b3826>] kstrdup_const+0x46/0x60 mm/util.c:74 [<ffffffff8194e5bb>] __kernfs_new_node+0x2b/0x2b0 fs/kernfs/dir.c:536 [<ffffffff81951c70>] kernfs_new_node+0x80/0xe0 fs/kernfs/dir.c:572 [<ffffffff81957223>] kernfs_create_link+0x33/0x150 fs/kernfs/symlink.c:32 [<ffffffff81959c4b>] sysfs_do_create_link_sd.isra.2+0x8b/0x120 fs/sysfs/symlink.c:44 [< inline >] sysfs_do_create_link fs/sysfs/symlink.c:80 [<ffffffff81959d45>] sysfs_create_link+0x65/0xc0 fs/sysfs/symlink.c:92 [< inline >] device_add_class_symlinks drivers/base/core.c:891 [<ffffffff835897fc>] device_add+0x73c/0x1480 drivers/base/core.c:1086 [<ffffffff8358a55d>] device_register+0x1d/0x20 drivers/base/core.c:1189 [<ffffffff82f80b50>] tty_register_device_attr+0x320/0x760 drivers/tty/tty_io.c:3312 [< inline >] tty_register_device drivers/tty/tty_io.c:3239 [<ffffffff82f8133b>] tty_register_driver+0x36b/0x670 drivers/tty/tty_io.c:3504 [<ffffffff848b4ef8>] isdn_tty_modem_init+0x3a8/0x1220 drivers/isdn/i4l/isdn_tty.c:1785 [<ffffffff889ed622>] isdn_init+0x2c3/0x505 drivers/isdn/i4l/isdn_common.c:2334 [<ffffffff81002259>] do_one_initcall+0x159/0x380 init/main.c:794 unreferenced object 0xffff880064f41380 (size 152): comm "swapper/0", pid 1, jiffies 4294674404 (age 929.066s) hex dump (first 32 bytes): 01 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 00 00 00 00 ................ backtrace: [<ffffffff81761ba3>] kmem_cache_alloc+0x153/0x2e0 mm/slub.c:2609 [< inline >] kmem_cache_zalloc include/linux/slab.h:597 [<ffffffff8194e5fc>] __kernfs_new_node+0x6c/0x2b0 fs/kernfs/dir.c:540 [<ffffffff81951c70>] kernfs_new_node+0x80/0xe0 fs/kernfs/dir.c:572 [<ffffffff81957223>] kernfs_create_link+0x33/0x150 fs/kernfs/symlink.c:32 [<ffffffff81959c4b>] sysfs_do_create_link_sd.isra.2+0x8b/0x120 fs/sysfs/symlink.c:44 [< inline >] sysfs_do_create_link fs/sysfs/symlink.c:80 [<ffffffff81959d45>] sysfs_create_link+0x65/0xc0 fs/sysfs/symlink.c:92 [< inline >] device_add_class_symlinks drivers/base/core.c:891 [<ffffffff835897fc>] device_add+0x73c/0x1480 drivers/base/core.c:1086 [<ffffffff8358a55d>] device_register+0x1d/0x20 drivers/base/core.c:1189 [<ffffffff82f80b50>] tty_register_device_attr+0x320/0x760 drivers/tty/tty_io.c:3312 [< inline >] tty_register_device drivers/tty/tty_io.c:3239 [<ffffffff82f8133b>] tty_register_driver+0x36b/0x670 drivers/tty/tty_io.c:3504 [<ffffffff848b4ef8>] isdn_tty_modem_init+0x3a8/0x1220 drivers/isdn/i4l/isdn_tty.c:1785 [<ffffffff889ed622>] isdn_init+0x2c3/0x505 drivers/isdn/i4l/isdn_common.c:2334 [<ffffffff81002259>] do_one_initcall+0x159/0x380 init/main.c:794 [< inline >] do_initcall_level init/main.c:859 [< inline >] do_initcalls init/main.c:867 [< inline >] do_basic_setup init/main.c:885 [<ffffffff888fcc29>] kernel_init_freeable+0x474/0x52d init/main.c:1010 [<ffffffff8663ca33>] kernel_init+0x13/0x150 init/main.c:936 unreferenced object 0xffff88006717e960 (size 8): comm "swapper/0", pid 1, jiffies 4294672708 (age 973.931s) hex dump (first 8 bytes): 32 33 37 3a 31 38 39 00 237:189. backtrace: [<ffffffff81765d10>] __kmalloc_track_caller+0x1b0/0x320 mm/slub.c:4068 [<ffffffff816b37a9>] kstrdup+0x39/0x70 mm/util.c:53 [<ffffffff816b3826>] kstrdup_const+0x46/0x60 mm/util.c:74 [<ffffffff8194e5bb>] __kernfs_new_node+0x2b/0x2b0 fs/kernfs/dir.c:536 [<ffffffff81951c70>] kernfs_new_node+0x80/0xe0 fs/kernfs/dir.c:572 [<ffffffff81957223>] kernfs_create_link+0x33/0x150 fs/kernfs/symlink.c:32 [<ffffffff81959c4b>] sysfs_do_create_link_sd.isra.2+0x8b/0x120 fs/sysfs/symlink.c:44 [< inline >] sysfs_do_create_link fs/sysfs/symlink.c:80 [<ffffffff81959d45>] sysfs_create_link+0x65/0xc0 fs/sysfs/symlink.c:92 [< inline >] device_create_sys_dev_entry drivers/base/core.c:974 [<ffffffff8358a05c>] device_add+0xf9c/0x1480 drivers/base/core.c:1105 [<ffffffff8358a55d>] device_register+0x1d/0x20 drivers/base/core.c:1189 [<ffffffff82f80b50>] tty_register_device_attr+0x320/0x760 drivers/tty/tty_io.c:3312 [< inline >] tty_register_device drivers/tty/tty_io.c:3239 [<ffffffff82f8133b>] tty_register_driver+0x36b/0x670 drivers/tty/tty_io.c:3504 [<ffffffff889babcb>] synclinkmp_init+0x35a/0x40e drivers/tty/synclinkmp.c:3992 [<ffffffff81002259>] do_one_initcall+0x159/0x380 init/main.c:794 [< inline >] do_initcall_level init/main.c:859 [< inline >] do_initcalls init/main.c:867 [< inline >] do_basic_setup init/main.c:885 [<ffffffff888fcc29>] kernel_init_freeable+0x474/0x52d init/main.c:1010 unreferenced object 0xffff880067169ad0 (size 152): comm "swapper/0", pid 1, jiffies 4294672708 (age 973.931s) hex dump (first 32 bytes): 01 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 00 00 00 00 ................ backtrace: [<ffffffff81761ba3>] kmem_cache_alloc+0x153/0x2e0 mm/slub.c:2609 [< inline >] kmem_cache_zalloc include/linux/slab.h:597 [<ffffffff8194e5fc>] __kernfs_new_node+0x6c/0x2b0 fs/kernfs/dir.c:540 [<ffffffff81951c70>] kernfs_new_node+0x80/0xe0 fs/kernfs/dir.c:572 [<ffffffff81957223>] kernfs_create_link+0x33/0x150 fs/kernfs/symlink.c:32 [<ffffffff81959c4b>] sysfs_do_create_link_sd.isra.2+0x8b/0x120 fs/sysfs/symlink.c:44 [< inline >] sysfs_do_create_link fs/sysfs/symlink.c:80 [<ffffffff81959d45>] sysfs_create_link+0x65/0xc0 fs/sysfs/symlink.c:92 [< inline >] device_create_sys_dev_entry drivers/base/core.c:974 [<ffffffff8358a05c>] device_add+0xf9c/0x1480 drivers/base/core.c:1105 [<ffffffff8358a55d>] device_register+0x1d/0x20 drivers/base/core.c:1189 [<ffffffff82f80b50>] tty_register_device_attr+0x320/0x760 drivers/tty/tty_io.c:3312 [< inline >] tty_register_device drivers/tty/tty_io.c:3239 [<ffffffff82f8133b>] tty_register_driver+0x36b/0x670 drivers/tty/tty_io.c:3504 [<ffffffff889babcb>] synclinkmp_init+0x35a/0x40e drivers/tty/synclinkmp.c:3992 [<ffffffff81002259>] do_one_initcall+0x159/0x380 init/main.c:794 [< inline >] do_initcall_level init/main.c:859 [< inline >] do_initcalls init/main.c:867 [< inline >] do_basic_setup init/main.c:885 [<ffffffff888fcc29>] kernel_init_freeable+0x474/0x52d init/main.c:1010 [<ffffffff8663ca33>] kernel_init+0x13/0x150 init/main.c:936 [<ffffffff866617af>] ret_from_fork+0x3f/0x70 arch/x86/entry/entry_64.S:468 unreferenced object 0xffff88006717eb40 (size 8): comm "swapper/0", pid 1, jiffies 4294672709 (age 973.930s) hex dump (first 8 bytes): 32 33 37 3a 31 39 30 00 237:190. backtrace: [<ffffffff81765d10>] __kmalloc_track_caller+0x1b0/0x320 mm/slub.c:4068 [<ffffffff816b37a9>] kstrdup+0x39/0x70 mm/util.c:53 [<ffffffff816b3826>] kstrdup_const+0x46/0x60 mm/util.c:74 [<ffffffff8194e5bb>] __kernfs_new_node+0x2b/0x2b0 fs/kernfs/dir.c:536 [<ffffffff81951c70>] kernfs_new_node+0x80/0xe0 fs/kernfs/dir.c:572 [<ffffffff81957223>] kernfs_create_link+0x33/0x150 fs/kernfs/symlink.c:32 [<ffffffff81959c4b>] sysfs_do_create_link_sd.isra.2+0x8b/0x120 fs/sysfs/symlink.c:44 [< inline >] sysfs_do_create_link fs/sysfs/symlink.c:80 [<ffffffff81959d45>] sysfs_create_link+0x65/0xc0 fs/sysfs/symlink.c:92 [< inline >] device_create_sys_dev_entry drivers/base/core.c:974 [<ffffffff8358a05c>] device_add+0xf9c/0x1480 drivers/base/core.c:1105 [<ffffffff8358a55d>] device_register+0x1d/0x20 drivers/base/core.c:1189 [<ffffffff82f80b50>] tty_register_device_attr+0x320/0x760 drivers/tty/tty_io.c:3312 [< inline >] tty_register_device drivers/tty/tty_io.c:3239 [<ffffffff82f8133b>] tty_register_driver+0x36b/0x670 drivers/tty/tty_io.c:3504 [<ffffffff889babcb>] synclinkmp_init+0x35a/0x40e drivers/tty/synclinkmp.c:3992 [<ffffffff81002259>] do_one_initcall+0x159/0x380 init/main.c:794 [< inline >] do_initcall_level init/main.c:859 [< inline >] do_initcalls init/main.c:867 [< inline >] do_basic_setup init/main.c:885 [<ffffffff888fcc29>] kernel_init_freeable+0x474/0x52d init/main.c:1010 unreferenced object 0xffff8800363ffa80 (size 152): comm "swapper/0", pid 1, jiffies 4294672709 (age 973.962s) hex dump (first 32 bytes): 01 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 00 00 00 00 ................ backtrace: [<ffffffff81761ba3>] kmem_cache_alloc+0x153/0x2e0 mm/slub.c:2609 [< inline >] kmem_cache_zalloc include/linux/slab.h:597 [<ffffffff8194e5fc>] __kernfs_new_node+0x6c/0x2b0 fs/kernfs/dir.c:540 [<ffffffff81951c70>] kernfs_new_node+0x80/0xe0 fs/kernfs/dir.c:572 [<ffffffff81957223>] kernfs_create_link+0x33/0x150 fs/kernfs/symlink.c:32 [<ffffffff81959c4b>] sysfs_do_create_link_sd.isra.2+0x8b/0x120 fs/sysfs/symlink.c:44 [< inline >] sysfs_do_create_link fs/sysfs/symlink.c:80 [<ffffffff81959d45>] sysfs_create_link+0x65/0xc0 fs/sysfs/symlink.c:92 [< inline >] device_create_sys_dev_entry drivers/base/core.c:974 [<ffffffff8358a05c>] device_add+0xf9c/0x1480 drivers/base/core.c:1105 [<ffffffff8358a55d>] device_register+0x1d/0x20 drivers/base/core.c:1189 [<ffffffff82f80b50>] tty_register_device_attr+0x320/0x760 drivers/tty/tty_io.c:3312 [< inline >] tty_register_device drivers/tty/tty_io.c:3239 [<ffffffff82f8133b>] tty_register_driver+0x36b/0x670 drivers/tty/tty_io.c:3504 [<ffffffff889babcb>] synclinkmp_init+0x35a/0x40e drivers/tty/synclinkmp.c:3992 [<ffffffff81002259>] do_one_initcall+0x159/0x380 init/main.c:794 [< inline >] do_initcall_level init/main.c:859 [< inline >] do_initcalls init/main.c:867 [< inline >] do_basic_setup init/main.c:885 [<ffffffff888fcc29>] kernel_init_freeable+0x474/0x52d init/main.c:1010 [<ffffffff8663ca33>] kernel_init+0x13/0x150 init/main.c:936 [<ffffffff866617af>] ret_from_fork+0x3f/0x70 arch/x86/entry/entry_64.S:468 unreferenced object 0xffff88006717ed20 (size 8): comm "swapper/0", pid 1, jiffies 4294672711 (age 973.960s) hex dump (first 8 bytes): 32 33 37 3a 31 39 31 00 237:191. backtrace: [<ffffffff81765d10>] __kmalloc_track_caller+0x1b0/0x320 mm/slub.c:4068 [<ffffffff816b37a9>] kstrdup+0x39/0x70 mm/util.c:53 [<ffffffff816b3826>] kstrdup_const+0x46/0x60 mm/util.c:74 [<ffffffff8194e5bb>] __kernfs_new_node+0x2b/0x2b0 fs/kernfs/dir.c:536 [<ffffffff81951c70>] kernfs_new_node+0x80/0xe0 fs/kernfs/dir.c:572 [<ffffffff81957223>] kernfs_create_link+0x33/0x150 fs/kernfs/symlink.c:32 [<ffffffff81959c4b>] sysfs_do_create_link_sd.isra.2+0x8b/0x120 fs/sysfs/symlink.c:44 [< inline >] sysfs_do_create_link fs/sysfs/symlink.c:80 [<ffffffff81959d45>] sysfs_create_link+0x65/0xc0 fs/sysfs/symlink.c:92 [< inline >] device_create_sys_dev_entry drivers/base/core.c:974 [<ffffffff8358a05c>] device_add+0xf9c/0x1480 drivers/base/core.c:1105 [<ffffffff8358a55d>] device_register+0x1d/0x20 drivers/base/core.c:1189 [<ffffffff82f80b50>] tty_register_device_attr+0x320/0x760 drivers/tty/tty_io.c:3312 [< inline >] tty_register_device drivers/tty/tty_io.c:3239 [<ffffffff82f8133b>] tty_register_driver+0x36b/0x670 drivers/tty/tty_io.c:3504 [<ffffffff889babcb>] synclinkmp_init+0x35a/0x40e drivers/tty/synclinkmp.c:3992 [<ffffffff81002259>] do_one_initcall+0x159/0x380 init/main.c:794 [< inline >] do_initcall_level init/main.c:859 [< inline >] do_initcalls init/main.c:867 [< inline >] do_basic_setup init/main.c:885 [<ffffffff888fcc29>] kernel_init_freeable+0x474/0x52d init/main.c:1010 unreferenced object 0xffff8800671c3cf0 (size 152): comm "swapper/0", pid 1, jiffies 4294672711 (age 973.960s) hex dump (first 32 bytes): 01 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 00 00 00 00 ................ backtrace: [<ffffffff81761ba3>] kmem_cache_alloc+0x153/0x2e0 mm/slub.c:2609 [< inline >] kmem_cache_zalloc include/linux/slab.h:597 [<ffffffff8194e5fc>] __kernfs_new_node+0x6c/0x2b0 fs/kernfs/dir.c:540 [<ffffffff81951c70>] kernfs_new_node+0x80/0xe0 fs/kernfs/dir.c:572 [<ffffffff81957223>] kernfs_create_link+0x33/0x150 fs/kernfs/symlink.c:32 [<ffffffff81959c4b>] sysfs_do_create_link_sd.isra.2+0x8b/0x120 fs/sysfs/symlink.c:44 [< inline >] sysfs_do_create_link fs/sysfs/symlink.c:80 [<ffffffff81959d45>] sysfs_create_link+0x65/0xc0 fs/sysfs/symlink.c:92 [< inline >] device_create_sys_dev_entry drivers/base/core.c:974 [<ffffffff8358a05c>] device_add+0xf9c/0x1480 drivers/base/core.c:1105 [<ffffffff8358a55d>] device_register+0x1d/0x20 drivers/base/core.c:1189 [<ffffffff82f80b50>] tty_register_device_attr+0x320/0x760 drivers/tty/tty_io.c:3312 [< inline >] tty_register_device drivers/tty/tty_io.c:3239 [<ffffffff82f8133b>] tty_register_driver+0x36b/0x670 drivers/tty/tty_io.c:3504 [<ffffffff889babcb>] synclinkmp_init+0x35a/0x40e drivers/tty/synclinkmp.c:3992 [<ffffffff81002259>] do_one_initcall+0x159/0x380 init/main.c:794 [< inline >] do_initcall_level init/main.c:859 [< inline >] do_initcalls init/main.c:867 [< inline >] do_basic_setup init/main.c:885 [<ffffffff888fcc29>] kernel_init_freeable+0x474/0x52d init/main.c:1010 [<ffffffff8663ca33>] kernel_init+0x13/0x150 init/main.c:936 [<ffffffff866617af>] ret_from_fork+0x3f/0x70 arch/x86/entry/entry_64.S:468 unreferenced object 0xffff88006ca7f5a0 (size 152): comm "swapper/0", pid 1, jiffies 4294670068 (age 267.578s) hex dump (first 32 bytes): 01 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 00 00 00 00 ................ backtrace: [<ffffffff81761ba3>] kmem_cache_alloc+0x153/0x2e0 mm/slub.c:2609 [< inline >] kmem_cache_zalloc include/linux/slab.h:597 [<ffffffff8194e5fc>] __kernfs_new_node+0x6c/0x2b0 fs/kernfs/dir.c:540 [<ffffffff81951c70>] kernfs_new_node+0x80/0xe0 fs/kernfs/dir.c:572 [<ffffffff81957223>] kernfs_create_link+0x33/0x150 fs/kernfs/symlink.c:32 [<ffffffff81959c4b>] sysfs_do_create_link_sd.isra.2+0x8b/0x120 fs/sysfs/symlink.c:44 [< inline >] sysfs_do_create_link fs/sysfs/symlink.c:80 [<ffffffff81959d45>] sysfs_create_link+0x65/0xc0 fs/sysfs/symlink.c:92 [< inline >] device_add_class_symlinks drivers/base/core.c:891 [<ffffffff835897fc>] device_add+0x73c/0x1480 drivers/base/core.c:1086 [<ffffffff8358a55d>] device_register+0x1d/0x20 drivers/base/core.c:1189 [<ffffffff82f80b50>] tty_register_device_attr+0x320/0x760 drivers/tty/tty_io.c:3312 [< inline >] tty_register_device drivers/tty/tty_io.c:3239 [<ffffffff82f8133b>] tty_register_driver+0x36b/0x670 drivers/tty/tty_io.c:3504 [<ffffffff889b171c>] vty_init+0x366/0x398 drivers/tty/vt/vt.c:3093 [<ffffffff889af3f6>] tty_init+0x146/0x14a drivers/tty/tty_io.c:3686 [<ffffffff889bb4e8>] chr_dev_init+0x12a/0x13c drivers/char/mem.c:869 [<ffffffff81002259>] do_one_initcall+0x159/0x380 init/main.c:794 [< inline >] do_initcall_level init/main.c:859 [< inline >] do_initcalls init/main.c:867 [< inline >] do_basic_setup init/main.c:885 [<ffffffff888fcc29>] kernel_init_freeable+0x474/0x52d init/main.c:1010 unreferenced object 0xffff88003de48000 (size 2096): comm "swapper/0", pid 0, jiffies 4294667421 (age 186.244s) hex dump (first 32 bytes): 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 00 00 00 00 00 ................ backtrace: [<ffffffff81761ba3>] kmem_cache_alloc+0x153/0x2e0 mm/slub.c:2609 [< inline >] kmem_cache_zalloc include/linux/slab.h:597 [< inline >] __idr_pre_get lib/idr.c:196 [<ffffffff82be9253>] ida_pre_get+0x123/0x270 lib/idr.c:899 [<ffffffff82be9471>] ida_simple_get+0xd1/0x1d0 lib/idr.c:1096 [<ffffffff8194e622>] __kernfs_new_node+0x92/0x2b0 fs/kernfs/dir.c:544 [<ffffffff81952906>] kernfs_create_root+0xe6/0x2a0 fs/kernfs/dir.c:782 [<ffffffff88972422>] sysfs_init+0x18/0x8c fs/sysfs/mount.c:69 [<ffffffff8896d670>] mnt_init+0x1e0/0x42e fs/namespace.c:3143 [<ffffffff8896cfdc>] vfs_caches_init+0xaa/0x156 fs/dcache.c:3461 [<ffffffff888fc718>] start_kernel+0x60c/0x6a9 init/main.c:659 [<ffffffff888fb350>] x86_64_start_reservations+0x38/0x3a arch/x86/kernel/head64.c:203 [<ffffffff888fb4aa>] x86_64_start_kernel+0x158/0x167 arch/x86/kernel/head64.c:184 [<ffffffffffffffff>] 0xffffffffffffffff unreferenced object 0xffff88003de4ee58 (size 2096): comm "swapper/0", pid 0, jiffies 4294667421 (age 186.244s) hex dump (first 32 bytes): 00 00 00 00 00 00 00 00 00 80 e4 3d 00 88 ff ff ...........=.... 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 ................ backtrace: [<ffffffff81761ba3>] kmem_cache_alloc+0x153/0x2e0 mm/slub.c:2609 [< inline >] kmem_cache_zalloc include/linux/slab.h:597 [< inline >] __idr_pre_get lib/idr.c:196 [<ffffffff82be9253>] ida_pre_get+0x123/0x270 lib/idr.c:899 [<ffffffff82be9471>] ida_simple_get+0xd1/0x1d0 lib/idr.c:1096 [<ffffffff8194e622>] __kernfs_new_node+0x92/0x2b0 fs/kernfs/dir.c:544 [<ffffffff81952906>] kernfs_create_root+0xe6/0x2a0 fs/kernfs/dir.c:782 [<ffffffff88972422>] sysfs_init+0x18/0x8c fs/sysfs/mount.c:69 [<ffffffff8896d670>] mnt_init+0x1e0/0x42e fs/namespace.c:3143 [<ffffffff8896cfdc>] vfs_caches_init+0xaa/0x156 fs/dcache.c:3461 [<ffffffff888fc718>] start_kernel+0x60c/0x6a9 init/main.c:659 [<ffffffff888fb350>] x86_64_start_reservations+0x38/0x3a arch/x86/kernel/head64.c:203 [<ffffffff888fb4aa>] x86_64_start_kernel+0x158/0x167 arch/x86/kernel/head64.c:184 [<ffffffffffffffff>] 0xffffffffffffffff