memory leak in v9fs_cache_session_get

memory leak in v9fs_cache_session_get_cookie
Status: fixed on 2019/10/15 23:40
Reported-by: syzbot+3a030a73b6c1e9833815@syzkaller.appspotmail.com
Fix commit: 962a991c 9p/cache.c: Fix memory leak in v9fs_cache_session_get_cookie
First crash: 650d, last: 502d

similar bugs (1):
Kernel	Title	Repro	Cause bisect	Fix bisect	Count	Last	Reported	Patched	Status
upstream	memory leak in v9fs_cache_session_get_cookie (2)	C			319	198d	501d	0/21	upstream: reported C repro on 2019/10/16 19:52

Sample crash report:

BUG: memory leak
unreferenced object 0xffff888110b2bd20 (size 32):
  comm "syz-executor223", pid 6872, jiffies 4294947155 (age 16.570s)
  hex dump (first 32 bytes):
    34 32 39 34 39 34 37 31 35 35 00 00 00 00 00 00  4294947155......
    01 00 00 00 01 00 00 00 18 00 00 00 00 00 00 00  ................
  backtrace:
    [<00000000f8dcb684>] kmemleak_alloc_recursive include/linux/kmemleak.h:43 [inline]
    [<00000000f8dcb684>] slab_post_alloc_hook mm/slab.h:586 [inline]
    [<00000000f8dcb684>] slab_alloc mm/slab.c:3319 [inline]
    [<00000000f8dcb684>] kmem_cache_alloc_trace+0x145/0x2c0 mm/slab.c:3548
    [<000000006cc9bb19>] kmalloc include/linux/slab.h:556 [inline]
    [<000000006cc9bb19>] v9fs_random_cachetag fs/9p/cache.c:36 [inline]
    [<000000006cc9bb19>] v9fs_cache_session_get_cookie+0xa6/0x110 fs/9p/cache.c:52
    [<000000001a22cdee>] v9fs_session_init+0x5c3/0x880 fs/9p/v9fs.c:470
    [<0000000046303a68>] v9fs_mount+0x5e/0x3c0 fs/9p/vfs_super.c:124
    [<0000000041455dd8>] legacy_get_tree+0x27/0x80 fs/fs_context.c:647
    [<000000001fa6d22e>] vfs_get_tree+0x2d/0xe0 fs/super.c:1545
    [<00000000e19a7eeb>] do_new_mount fs/namespace.c:2823 [inline]
    [<00000000e19a7eeb>] do_mount+0x95f/0xc60 fs/namespace.c:3143
    [<00000000d41cbe4c>] ksys_mount+0xab/0x120 fs/namespace.c:3352
    [<0000000002d3db1b>] __do_sys_mount fs/namespace.c:3366 [inline]
    [<0000000002d3db1b>] __se_sys_mount fs/namespace.c:3363 [inline]
    [<0000000002d3db1b>] __x64_sys_mount+0x26/0x30 fs/namespace.c:3363
    [<000000006b6131cd>] do_syscall_64+0x73/0x1f0 arch/x86/entry/common.c:290
    [<0000000076d45a8a>] entry_SYSCALL_64_after_hwframe+0x44/0xa9

BUG: memory leak
unreferenced object 0xffff888112e548c0 (size 32):
  comm "syz-executor223", pid 6873, jiffies 4294947155 (age 16.570s)
  hex dump (first 32 bytes):
    34 32 39 34 39 34 37 31 35 35 00 00 00 00 00 00  4294947155......
    00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00  ................
  backtrace:
    [<00000000f8dcb684>] kmemleak_alloc_recursive include/linux/kmemleak.h:43 [inline]
    [<00000000f8dcb684>] slab_post_alloc_hook mm/slab.h:586 [inline]
    [<00000000f8dcb684>] slab_alloc mm/slab.c:3319 [inline]
    [<00000000f8dcb684>] kmem_cache_alloc_trace+0x145/0x2c0 mm/slab.c:3548
    [<000000006cc9bb19>] kmalloc include/linux/slab.h:556 [inline]
    [<000000006cc9bb19>] v9fs_random_cachetag fs/9p/cache.c:36 [inline]
    [<000000006cc9bb19>] v9fs_cache_session_get_cookie+0xa6/0x110 fs/9p/cache.c:52
    [<000000001a22cdee>] v9fs_session_init+0x5c3/0x880 fs/9p/v9fs.c:470
    [<0000000046303a68>] v9fs_mount+0x5e/0x3c0 fs/9p/vfs_super.c:124
    [<0000000041455dd8>] legacy_get_tree+0x27/0x80 fs/fs_context.c:647
    [<000000001fa6d22e>] vfs_get_tree+0x2d/0xe0 fs/super.c:1545
    [<00000000e19a7eeb>] do_new_mount fs/namespace.c:2823 [inline]
    [<00000000e19a7eeb>] do_mount+0x95f/0xc60 fs/namespace.c:3143
    [<00000000d41cbe4c>] ksys_mount+0xab/0x120 fs/namespace.c:3352
    [<0000000002d3db1b>] __do_sys_mount fs/namespace.c:3366 [inline]
    [<0000000002d3db1b>] __se_sys_mount fs/namespace.c:3363 [inline]
    [<0000000002d3db1b>] __x64_sys_mount+0x26/0x30 fs/namespace.c:3363
    [<000000006b6131cd>] do_syscall_64+0x73/0x1f0 arch/x86/entry/common.c:290
    [<0000000076d45a8a>] entry_SYSCALL_64_after_hwframe+0x44/0xa9

BUG: memory leak
unreferenced object 0xffff888112e54700 (size 32):
  comm "syz-executor223", pid 6874, jiffies 4294947155 (age 16.570s)
  hex dump (first 32 bytes):
    34 32 39 34 39 34 37 31 35 35 00 72 00 70 69 70  4294947155.r.pip
    65 3a 5b 32 36 32 34 37 5d 00 00 00 00 00 00 00  e:[26247].......
  backtrace:
    [<00000000f8dcb684>] kmemleak_alloc_recursive include/linux/kmemleak.h:43 [inline]
    [<00000000f8dcb684>] slab_post_alloc_hook mm/slab.h:586 [inline]
    [<00000000f8dcb684>] slab_alloc mm/slab.c:3319 [inline]
    [<00000000f8dcb684>] kmem_cache_alloc_trace+0x145/0x2c0 mm/slab.c:3548
    [<000000006cc9bb19>] kmalloc include/linux/slab.h:556 [inline]
    [<000000006cc9bb19>] v9fs_random_cachetag fs/9p/cache.c:36 [inline]
    [<000000006cc9bb19>] v9fs_cache_session_get_cookie+0xa6/0x110 fs/9p/cache.c:52
    [<000000001a22cdee>] v9fs_session_init+0x5c3/0x880 fs/9p/v9fs.c:470
    [<0000000046303a68>] v9fs_mount+0x5e/0x3c0 fs/9p/vfs_super.c:124
    [<0000000041455dd8>] legacy_get_tree+0x27/0x80 fs/fs_context.c:647
    [<000000001fa6d22e>] vfs_get_tree+0x2d/0xe0 fs/super.c:1545
    [<00000000e19a7eeb>] do_new_mount fs/namespace.c:2823 [inline]
    [<00000000e19a7eeb>] do_mount+0x95f/0xc60 fs/namespace.c:3143
    [<00000000d41cbe4c>] ksys_mount+0xab/0x120 fs/namespace.c:3352
    [<0000000002d3db1b>] __do_sys_mount fs/namespace.c:3366 [inline]
    [<0000000002d3db1b>] __se_sys_mount fs/namespace.c:3363 [inline]
    [<0000000002d3db1b>] __x64_sys_mount+0x26/0x30 fs/namespace.c:3363
    [<000000006b6131cd>] do_syscall_64+0x73/0x1f0 arch/x86/entry/common.c:290
    [<0000000076d45a8a>] entry_SYSCALL_64_after_hwframe+0x44/0xa9

BUG: memory leak
unreferenced object 0xffff888112e54b00 (size 32):
  comm "syz-executor223", pid 6876, jiffies 4294947160 (age 16.520s)
  hex dump (first 32 bytes):
    34 32 39 34 39 34 37 31 36 30 00 00 00 00 00 00  4294947160......
    00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00  ................
  backtrace:
    [<00000000f8dcb684>] kmemleak_alloc_recursive include/linux/kmemleak.h:43 [inline]
    [<00000000f8dcb684>] slab_post_alloc_hook mm/slab.h:586 [inline]
    [<00000000f8dcb684>] slab_alloc mm/slab.c:3319 [inline]
    [<00000000f8dcb684>] kmem_cache_alloc_trace+0x145/0x2c0 mm/slab.c:3548
    [<000000006cc9bb19>] kmalloc include/linux/slab.h:556 [inline]
    [<000000006cc9bb19>] v9fs_random_cachetag fs/9p/cache.c:36 [inline]
    [<000000006cc9bb19>] v9fs_cache_session_get_cookie+0xa6/0x110 fs/9p/cache.c:52
    [<000000001a22cdee>] v9fs_session_init+0x5c3/0x880 fs/9p/v9fs.c:470
    [<0000000046303a68>] v9fs_mount+0x5e/0x3c0 fs/9p/vfs_super.c:124
    [<0000000041455dd8>] legacy_get_tree+0x27/0x80 fs/fs_context.c:647
    [<000000001fa6d22e>] vfs_get_tree+0x2d/0xe0 fs/super.c:1545
    [<00000000e19a7eeb>] do_new_mount fs/namespace.c:2823 [inline]
    [<00000000e19a7eeb>] do_mount+0x95f/0xc60 fs/namespace.c:3143
    [<00000000d41cbe4c>] ksys_mount+0xab/0x120 fs/namespace.c:3352
    [<0000000002d3db1b>] __do_sys_mount fs/namespace.c:3366 [inline]
    [<0000000002d3db1b>] __se_sys_mount fs/namespace.c:3363 [inline]
    [<0000000002d3db1b>] __x64_sys_mount+0x26/0x30 fs/namespace.c:3363
    [<000000006b6131cd>] do_syscall_64+0x73/0x1f0 arch/x86/entry/common.c:290
    [<0000000076d45a8a>] entry_SYSCALL_64_after_hwframe+0x44/0xa9

BUG: memory leak
unreferenced object 0xffff888110b2bd20 (size 32):
  comm "syz-executor223", pid 6872, jiffies 4294947155 (age 16.630s)
  hex dump (first 32 bytes):
    34 32 39 34 39 34 37 31 35 35 00 00 00 00 00 00  4294947155......
    01 00 00 00 01 00 00 00 18 00 00 00 00 00 00 00  ................
  backtrace:
    [<00000000f8dcb684>] kmemleak_alloc_recursive include/linux/kmemleak.h:43 [inline]
    [<00000000f8dcb684>] slab_post_alloc_hook mm/slab.h:586 [inline]
    [<00000000f8dcb684>] slab_alloc mm/slab.c:3319 [inline]
    [<00000000f8dcb684>] kmem_cache_alloc_trace+0x145/0x2c0 mm/slab.c:3548
    [<000000006cc9bb19>] kmalloc include/linux/slab.h:556 [inline]
    [<000000006cc9bb19>] v9fs_random_cachetag fs/9p/cache.c:36 [inline]
    [<000000006cc9bb19>] v9fs_cache_session_get_cookie+0xa6/0x110 fs/9p/cache.c:52
    [<000000001a22cdee>] v9fs_session_init+0x5c3/0x880 fs/9p/v9fs.c:470
    [<0000000046303a68>] v9fs_mount+0x5e/0x3c0 fs/9p/vfs_super.c:124
    [<0000000041455dd8>] legacy_get_tree+0x27/0x80 fs/fs_context.c:647
    [<000000001fa6d22e>] vfs_get_tree+0x2d/0xe0 fs/super.c:1545
    [<00000000e19a7eeb>] do_new_mount fs/namespace.c:2823 [inline]
    [<00000000e19a7eeb>] do_mount+0x95f/0xc60 fs/namespace.c:3143
    [<00000000d41cbe4c>] ksys_mount+0xab/0x120 fs/namespace.c:3352
    [<0000000002d3db1b>] __do_sys_mount fs/namespace.c:3366 [inline]
    [<0000000002d3db1b>] __se_sys_mount fs/namespace.c:3363 [inline]
    [<0000000002d3db1b>] __x64_sys_mount+0x26/0x30 fs/namespace.c:3363
    [<000000006b6131cd>] do_syscall_64+0x73/0x1f0 arch/x86/entry/common.c:290
    [<0000000076d45a8a>] entry_SYSCALL_64_after_hwframe+0x44/0xa9

BUG: memory leak
unreferenced object 0xffff888112e548c0 (size 32):
  comm "syz-executor223", pid 6873, jiffies 4294947155 (age 16.630s)
  hex dump (first 32 bytes):
    34 32 39 34 39 34 37 31 35 35 00 00 00 00 00 00  4294947155......
    00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00  ................
  backtrace:
    [<00000000f8dcb684>] kmemleak_alloc_recursive include/linux/kmemleak.h:43 [inline]
    [<00000000f8dcb684>] slab_post_alloc_hook mm/slab.h:586 [inline]
    [<00000000f8dcb684>] slab_alloc mm/slab.c:3319 [inline]
    [<00000000f8dcb684>] kmem_cache_alloc_trace+0x145/0x2c0 mm/slab.c:3548
    [<000000006cc9bb19>] kmalloc include/linux/slab.h:556 [inline]
    [<000000006cc9bb19>] v9fs_random_cachetag fs/9p/cache.c:36 [inline]
    [<000000006cc9bb19>] v9fs_cache_session_get_cookie+0xa6/0x110 fs/9p/cache.c:52
    [<000000001a22cdee>] v9fs_session_init+0x5c3/0x880 fs/9p/v9fs.c:470
    [<0000000046303a68>] v9fs_mount+0x5e/0x3c0 fs/9p/vfs_super.c:124
    [<0000000041455dd8>] legacy_get_tree+0x27/0x80 fs/fs_context.c:647
    [<000000001fa6d22e>] vfs_get_tree+0x2d/0xe0 fs/super.c:1545
    [<00000000e19a7eeb>] do_new_mount fs/namespace.c:2823 [inline]
    [<00000000e19a7eeb>] do_mount+0x95f/0xc60 fs/namespace.c:3143
    [<00000000d41cbe4c>] ksys_mount+0xab/0x120 fs/namespace.c:3352
    [<0000000002d3db1b>] __do_sys_mount fs/namespace.c:3366 [inline]
    [<0000000002d3db1b>] __se_sys_mount fs/namespace.c:3363 [inline]
    [<0000000002d3db1b>] __x64_sys_mount+0x26/0x30 fs/namespace.c:3363
    [<000000006b6131cd>] do_syscall_64+0x73/0x1f0 arch/x86/entry/common.c:290
    [<0000000076d45a8a>] entry_SYSCALL_64_after_hwframe+0x44/0xa9

BUG: memory leak
unreferenced object 0xffff888112e54700 (size 32):
  comm "syz-executor223", pid 6874, jiffies 4294947155 (age 16.630s)
  hex dump (first 32 bytes):
    34 32 39 34 39 34 37 31 35 35 00 72 00 70 69 70  4294947155.r.pip
    65 3a 5b 32 36 32 34 37 5d 00 00 00 00 00 00 00  e:[26247].......
  backtrace:
    [<00000000f8dcb684>] kmemleak_alloc_recursive include/linux/kmemleak.h:43 [inline]
    [<00000000f8dcb684>] slab_post_alloc_hook mm/slab.h:586 [inline]
    [<00000000f8dcb684>] slab_alloc mm/slab.c:3319 [inline]
    [<00000000f8dcb684>] kmem_cache_alloc_trace+0x145/0x2c0 mm/slab.c:3548
    [<000000006cc9bb19>] kmalloc include/linux/slab.h:556 [inline]
    [<000000006cc9bb19>] v9fs_random_cachetag fs/9p/cache.c:36 [inline]
    [<000000006cc9bb19>] v9fs_cache_session_get_cookie+0xa6/0x110 fs/9p/cache.c:52
    [<000000001a22cdee>] v9fs_session_init+0x5c3/0x880 fs/9p/v9fs.c:470
    [<0000000046303a68>] v9fs_mount+0x5e/0x3c0 fs/9p/vfs_super.c:124
    [<0000000041455dd8>] legacy_get_tree+0x27/0x80 fs/fs_context.c:647
    [<000000001fa6d22e>] vfs_get_tree+0x2d/0xe0 fs/super.c:1545
    [<00000000e19a7eeb>] do_new_mount fs/namespace.c:2823 [inline]
    [<00000000e19a7eeb>] do_mount+0x95f/0xc60 fs/namespace.c:3143
    [<00000000d41cbe4c>] ksys_mount+0xab/0x120 fs/namespace.c:3352
    [<0000000002d3db1b>] __do_sys_mount fs/namespace.c:3366 [inline]
    [<0000000002d3db1b>] __se_sys_mount fs/namespace.c:3363 [inline]
    [<0000000002d3db1b>] __x64_sys_mount+0x26/0x30 fs/namespace.c:3363
    [<000000006b6131cd>] do_syscall_64+0x73/0x1f0 arch/x86/entry/common.c:290
    [<0000000076d45a8a>] entry_SYSCALL_64_after_hwframe+0x44/0xa9

BUG: memory leak
unreferenced object 0xffff888112e54b00 (size 32):
  comm "syz-executor223", pid 6876, jiffies 4294947160 (age 16.580s)
  hex dump (first 32 bytes):
    34 32 39 34 39 34 37 31 36 30 00 00 00 00 00 00  4294947160......
    00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00  ................
  backtrace:
    [<00000000f8dcb684>] kmemleak_alloc_recursive include/linux/kmemleak.h:43 [inline]
    [<00000000f8dcb684>] slab_post_alloc_hook mm/slab.h:586 [inline]
    [<00000000f8dcb684>] slab_alloc mm/slab.c:3319 [inline]
    [<00000000f8dcb684>] kmem_cache_alloc_trace+0x145/0x2c0 mm/slab.c:3548
    [<000000006cc9bb19>] kmalloc include/linux/slab.h:556 [inline]
    [<000000006cc9bb19>] v9fs_random_cachetag fs/9p/cache.c:36 [inline]
    [<000000006cc9bb19>] v9fs_cache_session_get_cookie+0xa6/0x110 fs/9p/cache.c:52
    [<000000001a22cdee>] v9fs_session_init+0x5c3/0x880 fs/9p/v9fs.c:470
    [<0000000046303a68>] v9fs_mount+0x5e/0x3c0 fs/9p/vfs_super.c:124
    [<0000000041455dd8>] legacy_get_tree+0x27/0x80 fs/fs_context.c:647
    [<000000001fa6d22e>] vfs_get_tree+0x2d/0xe0 fs/super.c:1545
    [<00000000e19a7eeb>] do_new_mount fs/namespace.c:2823 [inline]
    [<00000000e19a7eeb>] do_mount+0x95f/0xc60 fs/namespace.c:3143
    [<00000000d41cbe4c>] ksys_mount+0xab/0x120 fs/namespace.c:3352
    [<0000000002d3db1b>] __do_sys_mount fs/namespace.c:3366 [inline]
    [<0000000002d3db1b>] __se_sys_mount fs/namespace.c:3363 [inline]
    [<0000000002d3db1b>] __x64_sys_mount+0x26/0x30 fs/namespace.c:3363
    [<000000006b6131cd>] do_syscall_64+0x73/0x1f0 arch/x86/entry/common.c:290
    [<0000000076d45a8a>] entry_SYSCALL_64_after_hwframe+0x44/0xa9

BUG: memory leak
unreferenced object 0xffff888110b2bd20 (size 32):
  comm "syz-executor223", pid 6872, jiffies 4294947155 (age 17.560s)
  hex dump (first 32 bytes):
    34 32 39 34 39 34 37 31 35 35 00 00 00 00 00 00  4294947155......
    01 00 00 00 01 00 00 00 18 00 00 00 00 00 00 00  ................
  backtrace:
    [<00000000f8dcb684>] kmemleak_alloc_recursive include/linux/kmemleak.h:43 [inline]
    [<00000000f8dcb684>] slab_post_alloc_hook mm/slab.h:586 [inline]
    [<00000000f8dcb684>] slab_alloc mm/slab.c:3319 [inline]
    [<00000000f8dcb684>] kmem_cache_alloc_trace+0x145/0x2c0 mm/slab.c:3548
    [<000000006cc9bb19>] kmalloc include/linux/slab.h:556 [inline]
    [<000000006cc9bb19>] v9fs_random_cachetag fs/9p/cache.c:36 [inline]
    [<000000006cc9bb19>] v9fs_cache_session_get_cookie+0xa6/0x110 fs/9p/cache.c:52
    [<000000001a22cdee>] v9fs_session_init+0x5c3/0x880 fs/9p/v9fs.c:470
    [<0000000046303a68>] v9fs_mount+0x5e/0x3c0 fs/9p/vfs_super.c:124
    [<0000000041455dd8>] legacy_get_tree+0x27/0x80 fs/fs_context.c:647
    [<000000001fa6d22e>] vfs_get_tree+0x2d/0xe0 fs/super.c:1545
    [<00000000e19a7eeb>] do_new_mount fs/namespace.c:2823 [inline]
    [<00000000e19a7eeb>] do_mount+0x95f/0xc60 fs/namespace.c:3143
    [<00000000d41cbe4c>] ksys_mount+0xab/0x120 fs/namespace.c:3352
    [<0000000002d3db1b>] __do_sys_mount fs/namespace.c:3366 [inline]
    [<0000000002d3db1b>] __se_sys_mount fs/namespace.c:3363 [inline]
    [<0000000002d3db1b>] __x64_sys_mount+0x26/0x30 fs/namespace.c:3363
    [<000000006b6131cd>] do_syscall_64+0x73/0x1f0 arch/x86/entry/common.c:290
    [<0000000076d45a8a>] entry_SYSCALL_64_after_hwframe+0x44/0xa9

BUG: memory leak
unreferenced object 0xffff888112e548c0 (size 32):
  comm "syz-executor223", pid 6873, jiffies 4294947155 (age 17.560s)
  hex dump (first 32 bytes):
    34 32 39 34 39 34 37 31 35 35 00 00 00 00 00 00  4294947155......
    00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00  ................
  backtrace:
    [<00000000f8dcb684>] kmemleak_alloc_recursive include/linux/kmemleak.h:43 [inline]
    [<00000000f8dcb684>] slab_post_alloc_hook mm/slab.h:586 [inline]
    [<00000000f8dcb684>] slab_alloc mm/slab.c:3319 [inline]
    [<00000000f8dcb684>] kmem_cache_alloc_trace+0x145/0x2c0 mm/slab.c:3548
    [<000000006cc9bb19>] kmalloc include/linux/slab.h:556 [inline]
    [<000000006cc9bb19>] v9fs_random_cachetag fs/9p/cache.c:36 [inline]
    [<000000006cc9bb19>] v9fs_cache_session_get_cookie+0xa6/0x110 fs/9p/cache.c:52
    [<000000001a22cdee>] v9fs_session_init+0x5c3/0x880 fs/9p/v9fs.c:470
    [<0000000046303a68>] v9fs_mount+0x5e/0x3c0 fs/9p/vfs_super.c:124
    [<0000000041455dd8>] legacy_get_tree+0x27/0x80 fs/fs_context.c:647
    [<000000001fa6d22e>] vfs_get_tree+0x2d/0xe0 fs/super.c:1545
    [<00000000e19a7eeb>] do_new_mount fs/namespace.c:2823 [inline]
    [<00000000e19a7eeb>] do_mount+0x95f/0xc60 fs/namespace.c:3143
    [<00000000d41cbe4c>] ksys_mount+0xab/0x120 fs/namespace.c:3352
    [<0000000002d3db1b>] __do_sys_mount fs/namespace.c:3366 [inline]
    [<0000000002d3db1b>] __se_sys_mount fs/namespace.c:3363 [inline]
    [<0000000002d3db1b>] __x64_sys_mount+0x26/0x30 fs/namespace.c:3363
    [<000000006b6131cd>] do_syscall_64+0x73/0x1f0 arch/x86/entry/common.c:290
    [<0000000076d45a8a>] entry_SYSCALL_64_after_hwframe+0x44/0xa9

BUG: memory leak
unreferenced object 0xffff888112e54700 (size 32):
  comm "syz-executor223", pid 6874, jiffies 4294947155 (age 17.560s)
  hex dump (first 32 bytes):
    34 32 39 34 39 34 37 31 35 35 00 72 00 70 69 70  4294947155.r.pip
    65 3a 5b 32 36 32 34 37 5d 00 00 00 00 00 00 00  e:[26247].......
  backtrace:
    [<00000000f8dcb684>] kmemleak_alloc_recursive include/linux/kmemleak.h:43 [inline]
    [<00000000f8dcb684>] slab_post_alloc_hook mm/slab.h:586 [inline]
    [<00000000f8dcb684>] slab_alloc mm/slab.c:3319 [inline]
    [<00000000f8dcb684>] kmem_cache_alloc_trace+0x145/0x2c0 mm/slab.c:3548
    [<000000006cc9bb19>] kmalloc include/linux/slab.h:556 [inline]
    [<000000006cc9bb19>] v9fs_random_cachetag fs/9p/cache.c:36 [inline]
    [<000000006cc9bb19>] v9fs_cache_session_get_cookie+0xa6/0x110 fs/9p/cache.c:52
    [<000000001a22cdee>] v9fs_session_init+0x5c3/0x880 fs/9p/v9fs.c:470
    [<0000000046303a68>] v9fs_mount+0x5e/0x3c0 fs/9p/vfs_super.c:124
    [<0000000041455dd8>] legacy_get_tree+0x27/0x80 fs/fs_context.c:647
    [<000000001fa6d22e>] vfs_get_tree+0x2d/0xe0 fs/super.c:1545
    [<00000000e19a7eeb>] do_new_mount fs/namespace.c:2823 [inline]
    [<00000000e19a7eeb>] do_mount+0x95f/0xc60 fs/namespace.c:3143
    [<00000000d41cbe4c>] ksys_mount+0xab/0x120 fs/namespace.c:3352
    [<0000000002d3db1b>] __do_sys_mount fs/namespace.c:3366 [inline]
    [<0000000002d3db1b>] __se_sys_mount fs/namespace.c:3363 [inline]
    [<0000000002d3db1b>] __x64_sys_mount+0x26/0x30 fs/namespace.c:3363
    [<000000006b6131cd>] do_syscall_64+0x73/0x1f0 arch/x86/entry/common.c:290
    [<0000000076d45a8a>] entry_SYSCALL_64_after_hwframe+0x44/0xa9

BUG: memory leak
unreferenced object 0xffff888112e54b00 (size 32):
  comm "syz-executor223", pid 6876, jiffies 4294947160 (age 17.510s)
  hex dump (first 32 bytes):
    34 32 39 34 39 34 37 31 36 30 00 00 00 00 00 00  4294947160......
    00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00  ................
  backtrace:
    [<00000000f8dcb684>] kmemleak_alloc_recursive include/linux/kmemleak.h:43 [inline]
    [<00000000f8dcb684>] slab_post_alloc_hook mm/slab.h:586 [inline]
    [<00000000f8dcb684>] slab_alloc mm/slab.c:3319 [inline]
    [<00000000f8dcb684>] kmem_cache_alloc_trace+0x145/0x2c0 mm/slab.c:3548
    [<000000006cc9bb19>] kmalloc include/linux/slab.h:556 [inline]
    [<000000006cc9bb19>] v9fs_random_cachetag fs/9p/cache.c:36 [inline]
    [<000000006cc9bb19>] v9fs_cache_session_get_cookie+0xa6/0x110 fs/9p/cache.c:52
    [<000000001a22cdee>] v9fs_session_init+0x5c3/0x880 fs/9p/v9fs.c:470
    [<0000000046303a68>] v9fs_mount+0x5e/0x3c0 fs/9p/vfs_super.c:124
    [<0000000041455dd8>] legacy_get_tree+0x27/0x80 fs/fs_context.c:647
    [<000000001fa6d22e>] vfs_get_tree+0x2d/0xe0 fs/super.c:1545
    [<00000000e19a7eeb>] do_new_mount fs/namespace.c:2823 [inline]
    [<00000000e19a7eeb>] do_mount+0x95f/0xc60 fs/namespace.c:3143
    [<00000000d41cbe4c>] ksys_mount+0xab/0x120 fs/namespace.c:3352
    [<0000000002d3db1b>] __do_sys_mount fs/namespace.c:3366 [inline]
    [<0000000002d3db1b>] __se_sys_mount fs/namespace.c:3363 [inline]
    [<0000000002d3db1b>] __x64_sys_mount+0x26/0x30 fs/namespace.c:3363
    [<000000006b6131cd>] do_syscall_64+0x73/0x1f0 arch/x86/entry/common.c:290
    [<0000000076d45a8a>] entry_SYSCALL_64_after_hwframe+0x44/0xa9

BUG: memory leak
unreferenced object 0xffff888110b2bd20 (size 32):
  comm "syz-executor223", pid 6872, jiffies 4294947155 (age 18.480s)
  hex dump (first 32 bytes):
    34 32 39 34 39 34 37 31 35 35 00 00 00 00 00 00  4294947155......
    01 00 00 00 01 00 00 00 18 00 00 00 00 00 00 00  ................
  backtrace:
    [<00000000f8dcb684>] kmemleak_alloc_recursive include/linux/kmemleak.h:43 [inline]
    [<00000000f8dcb684>] slab_post_alloc_hook mm/slab.h:586 [inline]
    [<00000000f8dcb684>] slab_alloc mm/slab.c:3319 [inline]
    [<00000000f8dcb684>] kmem_cache_alloc_trace+0x145/0x2c0 mm/slab.c:3548
    [<000000006cc9bb19>] kmalloc include/linux/slab.h:556 [inline]
    [<000000006cc9bb19>] v9fs_random_cachetag fs/9p/cache.c:36 [inline]
    [<000000006cc9bb19>] v9fs_cache_session_get_cookie+0xa6/0x110 fs/9p/cache.c:52
    [<000000001a22cdee>] v9fs_session_init+0x5c3/0x880 fs/9p/v9fs.c:470
    [<0000000046303a68>] v9fs_mount+0x5e/0x3c0 fs/9p/vfs_super.c:124
    [<0000000041455dd8>] legacy_get_tree+0x27/0x80 fs/fs_context.c:647
    [<000000001fa6d22e>] vfs_get_tree+0x2d/0xe0 fs/super.c:1545
    [<00000000e19a7eeb>] do_new_mount fs/namespace.c:2823 [inline]
    [<00000000e19a7eeb>] do_mount+0x95f/0xc60 fs/namespace.c:3143
    [<00000000d41cbe4c>] ksys_mount+0xab/0x120 fs/namespace.c:3352
    [<0000000002d3db1b>] __do_sys_mount fs/namespace.c:3366 [inline]
    [<0000000002d3db1b>] __se_sys_mount fs/namespace.c:3363 [inline]
    [<0000000002d3db1b>] __x64_sys_mount+0x26/0x30 fs/namespace.c:3363
    [<000000006b6131cd>] do_syscall_64+0x73/0x1f0 arch/x86/entry/common.c:290
    [<0000000076d45a8a>] entry_SYSCALL_64_after_hwframe+0x44/0xa9

BUG: memory leak
unreferenced object 0xffff888112e548c0 (size 32):
  comm "syz-executor223", pid 6873, jiffies 4294947155 (age 18.480s)
  hex dump (first 32 bytes):
    34 32 39 34 39 34 37 31 35 35 00 00 00 00 00 00  4294947155......
    00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00  ................
  backtrace:
    [<00000000f8dcb684>] kmemleak_alloc_recursive include/linux/kmemleak.h:43 [inline]
    [<00000000f8dcb684>] slab_post_alloc_hook mm/slab.h:586 [inline]
    [<00000000f8dcb684>] slab_alloc mm/slab.c:3319 [inline]
    [<00000000f8dcb684>] kmem_cache_alloc_trace+0x145/0x2c0 mm/slab.c:3548
    [<000000006cc9bb19>] kmalloc include/linux/slab.h:556 [inline]
    [<000000006cc9bb19>] v9fs_random_cachetag fs/9p/cache.c:36 [inline]
    [<000000006cc9bb19>] v9fs_cache_session_get_cookie+0xa6/0x110 fs/9p/cache.c:52
    [<000000001a22cdee>] v9fs_session_init+0x5c3/0x880 fs/9p/v9fs.c:470
    [<0000000046303a68>] v9fs_mount+0x5e/0x3c0 fs/9p/vfs_super.c:124
    [<0000000041455dd8>] legacy_get_tree+0x27/0x80 fs/fs_context.c:647
    [<000000001fa6d22e>] vfs_get_tree+0x2d/0xe0 fs/super.c:1545
    [<00000000e19a7eeb>] do_new_mount fs/namespace.c:2823 [inline]
    [<00000000e19a7eeb>] do_mount+0x95f/0xc60 fs/namespace.c:3143
    [<00000000d41cbe4c>] ksys_mount+0xab/0x120 fs/namespace.c:3352
    [<0000000002d3db1b>] __do_sys_mount fs/namespace.c:3366 [inline]
    [<0000000002d3db1b>] __se_sys_mount fs/namespace.c:3363 [inline]
    [<0000000002d3db1b>] __x64_sys_mount+0x26/0x30 fs/namespace.c:3363
    [<000000006b6131cd>] do_syscall_64+0x73/0x1f0 arch/x86/entry/common.c:290
    [<0000000076d45a8a>] entry_SYSCALL_64_after_hwframe+0x44/0xa9

BUG: memory leak
unreferenced object 0xffff888112e54700 (size 32):
  comm "syz-executor223", pid 6874, jiffies 4294947155 (age 18.480s)
  hex dump (first 32 bytes):
    34 32 39 34 39 34 37 31 35 35 00 72 00 70 69 70  4294947155.r.pip
    65 3a 5b 32 36 32 34 37 5d 00 00 00 00 00 00 00  e:[26247].......
  backtrace:
    [<00000000f8dcb684>] kmemleak_alloc_recursive include/linux/kmemleak.h:43 [inline]
    [<00000000f8dcb684>] slab_post_alloc_hook mm/slab.h:586 [inline]
    [<00000000f8dcb684>] slab_alloc mm/slab.c:3319 [inline]
    [<00000000f8dcb684>] kmem_cache_alloc_trace+0x145/0x2c0 mm/slab.c:3548
    [<000000006cc9bb19>] kmalloc include/linux/slab.h:556 [inline]
    [<000000006cc9bb19>] v9fs_random_cachetag fs/9p/cache.c:36 [inline]
    [<000000006cc9bb19>] v9fs_cache_session_get_cookie+0xa6/0x110 fs/9p/cache.c:52
    [<000000001a22cdee>] v9fs_session_init+0x5c3/0x880 fs/9p/v9fs.c:470
    [<0000000046303a68>] v9fs_mount+0x5e/0x3c0 fs/9p/vfs_super.c:124
    [<0000000041455dd8>] legacy_get_tree+0x27/0x80 fs/fs_context.c:647
    [<000000001fa6d22e>] vfs_get_tree+0x2d/0xe0 fs/super.c:1545
    [<00000000e19a7eeb>] do_new_mount fs/namespace.c:2823 [inline]
    [<00000000e19a7eeb>] do_mount+0x95f/0xc60 fs/namespace.c:3143
    [<00000000d41cbe4c>] ksys_mount+0xab/0x120 fs/namespace.c:3352
    [<0000000002d3db1b>] __do_sys_mount fs/namespace.c:3366 [inline]
    [<0000000002d3db1b>] __se_sys_mount fs/namespace.c:3363 [inline]
    [<0000000002d3db1b>] __x64_sys_mount+0x26/0x30 fs/namespace.c:3363
    [<000000006b6131cd>] do_syscall_64+0x73/0x1f0 arch/x86/entry/common.c:290
    [<0000000076d45a8a>] entry_SYSCALL_64_after_hwframe+0x44/0xa9

BUG: memory leak
unreferenced object 0xffff888112e54b00 (size 32):
  comm "syz-executor223", pid 6876, jiffies 4294947160 (age 18.430s)
  hex dump (first 32 bytes):
    34 32 39 34 39 34 37 31 36 30 00 00 00 00 00 00  4294947160......
    00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00  ................
  backtrace:
    [<00000000f8dcb684>] kmemleak_alloc_recursive include/linux/kmemleak.h:43 [inline]
    [<00000000f8dcb684>] slab_post_alloc_hook mm/slab.h:586 [inline]
    [<00000000f8dcb684>] slab_alloc mm/slab.c:3319 [inline]
    [<00000000f8dcb684>] kmem_cache_alloc_trace+0x145/0x2c0 mm/slab.c:3548
    [<000000006cc9bb19>] kmalloc include/linux/slab.h:556 [inline]
    [<000000006cc9bb19>] v9fs_random_cachetag fs/9p/cache.c:36 [inline]
    [<000000006cc9bb19>] v9fs_cache_session_get_cookie+0xa6/0x110 fs/9p/cache.c:52
    [<000000001a22cdee>] v9fs_session_init+0x5c3/0x880 fs/9p/v9fs.c:470
    [<0000000046303a68>] v9fs_mount+0x5e/0x3c0 fs/9p/vfs_super.c:124
    [<0000000041455dd8>] legacy_get_tree+0x27/0x80 fs/fs_context.c:647
    [<000000001fa6d22e>] vfs_get_tree+0x2d/0xe0 fs/super.c:1545
    [<00000000e19a7eeb>] do_new_mount fs/namespace.c:2823 [inline]
    [<00000000e19a7eeb>] do_mount+0x95f/0xc60 fs/namespace.c:3143
    [<00000000d41cbe4c>] ksys_mount+0xab/0x120 fs/namespace.c:3352
    [<0000000002d3db1b>] __do_sys_mount fs/namespace.c:3366 [inline]
    [<0000000002d3db1b>] __se_sys_mount fs/namespace.c:3363 [inline]
    [<0000000002d3db1b>] __x64_sys_mount+0x26/0x30 fs/namespace.c:3363
    [<000000006b6131cd>] do_syscall_64+0x73/0x1f0 arch/x86/entry/common.c:290
    [<0000000076d45a8a>] entry_SYSCALL_64_after_hwframe+0x44/0xa9

executing program
executing program
executing program
executing program

Crashes (242):
Manager	Time	Kernel	Commit	Syzkaller	Config	Log	Report	Syz repro	C repro
ci-upstream-gce-leak	2019/10/15 12:48	upstream	5bc52f64	b5268b89	.config	log	report	syz	C
ci-upstream-gce-leak	2019/10/14 21:13	upstream	4f5cafb5	05ad7292	.config	log	report	syz	C
ci-upstream-gce-leak	2019/10/14 19:29	upstream	4f5cafb5	05ad7292	.config	log	report	syz	C
ci-upstream-gce-leak	2019/10/14 12:48	upstream	d4615e5a	a6aef847	.config	log	report	syz	C
ci-upstream-gce-leak	2019/10/14 06:59	upstream	d4615e5a	2f661ec4	.config	log	report	syz	C
ci-upstream-gce-leak	2019/10/13 16:00	upstream	da940012	2f661ec4	.config	log	report	syz	C
ci-upstream-gce-leak	2019/10/13 00:35	upstream	328fefad	426631dd	.config	log	report	syz	C
ci-upstream-gce-leak	2019/10/12 22:29	upstream	1c0cc5f1	426631dd	.config	log	report	syz	C
ci-upstream-gce-leak	2019/10/12 16:50	upstream	1c0cc5f1	426631dd	.config	log	report	syz	C
ci-upstream-gce-leak	2019/10/12 11:39	upstream	1c0cc5f1	426631dd	.config	log	report	syz	C
ci-upstream-gce-leak	2019/10/11 23:59	upstream	9892f9f6	426631dd	.config	log	report	syz	C
ci-upstream-gce-leak	2019/10/11 23:40	upstream	9892f9f6	426631dd	.config	log	report	syz	C
ci-upstream-gce-leak	2019/10/11 00:43	upstream	9e208aa0	1a3bad90	.config	log	report	syz	C
ci-upstream-gce-leak	2019/10/10 20:50	upstream	fb20da6a	a4efa8c0	.config	log	report	syz	C
ci-upstream-gce-leak	2019/10/10 11:59	upstream	8a8c600d	a4efa8c0	.config	log	report	syz	C
ci-upstream-gce-leak	2019/10/10 07:02	upstream	8a8c600d	c4b9981b	.config	log	report	syz	C
ci-upstream-gce-leak	2019/10/08 21:31	upstream	eda57a0e	b1ebbfef	.config	log	report	syz	C
ci-upstream-gce-leak	2019/10/08 15:45	upstream	eda57a0e	137e37ca	.config	log	report	syz	C
ci-upstream-gce-leak	2019/10/06 23:35	upstream	7cdb85df	f3f7d9c8	.config	log	report	syz	C
ci-upstream-gce-leak	2019/10/05 23:19	upstream	4ea65534	f3f7d9c8	.config	log	report	syz	C
ci-upstream-gce-leak	2019/10/05 11:10	upstream	b145b0eb	f3f7d9c8	.config	log	report	syz	C
ci-upstream-gce-leak	2019/10/05 10:33	upstream	b145b0eb	f3f7d9c8	.config	log	report	syz	C
ci-upstream-gce-leak	2019/10/05 06:20	upstream	b145b0eb	f3f7d9c8	.config	log	report	syz	C
ci-upstream-gce-leak	2019/10/04 18:15	upstream	cc3a7bfe	3e1e84d4	.config	log	report	syz	C
ci-upstream-gce-leak	2019/10/03 16:24	upstream	0f1a7b3f	fc17ba49	.config	log	report	syz	C
ci-upstream-gce-leak	2019/10/03 15:43	upstream	0f1a7b3f	fc17ba49	.config	log	report	syz	C
ci-upstream-gce-leak	2019/10/03 05:33	upstream	65aa35c9	2e29b534	.config	log	report	syz	C
ci-upstream-gce-leak	2019/10/03 02:30	upstream	65aa35c9	2e29b534	.config	log	report	syz	C
ci-upstream-gce-leak	2019/10/02 14:16	upstream	54ecb8f7	2e29b534	.config	log	report	syz	C
ci-upstream-gce-leak	2019/10/02 13:38	upstream	54ecb8f7	2e29b534	.config	log	report	syz	C
ci-upstream-gce-leak	2019/10/01 03:45	upstream	54ecb8f7	c7a4fb99	.config	log	report	syz	C
ci-upstream-gce-leak	2019/09/30 00:26	upstream	a3c0e7b1	c1ad5441	.config	log	report	syz	C
ci-upstream-gce-leak	2019/09/29 23:51	upstream	a3c0e7b1	c1ad5441	.config	log	report	syz	C
ci-upstream-gce-leak	2019/09/29 15:44	upstream	02dc96ef	c1ad5441	.config	log	report	syz	C
ci-upstream-gce-leak	2019/09/28 17:05	upstream	f1f2f614	eb6b9855	.config	log	report	syz	C
ci-upstream-gce-leak	2019/09/28 09:58	upstream	8f744bde	d8074e0b	.config	log	report	syz	C
ci-upstream-gce-leak	2019/09/28 04:05	upstream	8f744bde	d8074e0b	.config	log	report	syz	C
ci-upstream-gce-leak	2019/09/27 17:18	upstream	da05b5ea	d8074e0b	.config	log	report	syz	C
ci-upstream-gce-leak	2019/09/27 11:20	upstream	da05b5ea	2f1548bc	.config	log	report	syz	C
ci-upstream-gce-leak	2019/09/27 00:22	upstream	cbafe18c	2f1548bc	.config	log	report	syz	C
ci-upstream-gce-leak	2019/09/26 21:43	upstream	cbafe18c	2f1548bc	.config	log	report	syz	C
ci-upstream-gce-leak	2019/05/20 20:49	upstream	f49aa1de	8285069f	.config	log	report	syz	C
ci-upstream-gce-leak	2019/09/30 13:48	upstream	97f9a3c4	c7a4fb99	.config	log	report	syz