memory leak in v9fs_cache_session_get

memory leak in v9fs_cache_session_get_cookie
Status: upstream: reported C repro on 2019/05/21 13:39
Reported-by: syzbot+3a030a73b6c1e9833815@syzkaller.appspotmail.com
First crash: 26d, last: 1d23h

Sample crash report:

 fl=222 nc=0 na=1]
BUG: memory leak
unreferenced object 0xffff88811d5b7ce0 (size 32):
  comm "syz-executor234", pid 7220, jiffies 4294945629 (age 16.870s)
  hex dump (first 32 bytes):
    34 32 39 34 39 34 35 36 32 39 00 00 00 00 00 00  4294945629......
    00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00  ................
  backtrace:
    [<000000002cabdadb>] kmemleak_alloc_recursive include/linux/kmemleak.h:55 [inline]
    [<000000002cabdadb>] slab_post_alloc_hook mm/slab.h:439 [inline]
    [<000000002cabdadb>] slab_alloc mm/slab.c:3326 [inline]
    [<000000002cabdadb>] kmem_cache_alloc_trace+0x13d/0x280 mm/slab.c:3553
    [<00000000c9696bd2>] kmalloc include/linux/slab.h:547 [inline]
    [<00000000c9696bd2>] v9fs_random_cachetag fs/9p/cache.c:51 [inline]
    [<00000000c9696bd2>] v9fs_cache_session_get_cookie+0xa6/0x100 fs/9p/cache.c:67
    [<000000009f2e3d4c>] v9fs_session_init+0x5c3/0x880 fs/9p/v9fs.c:485
    [<000000003e76ac4c>] v9fs_mount+0x5e/0x3a0 fs/9p/vfs_super.c:135
    [<00000000de1b2937>] legacy_get_tree+0x27/0x80 fs/fs_context.c:665
    [<000000009d8e25aa>] vfs_get_tree+0x2e/0x120 fs/super.c:1476
    [<0000000012e90ac4>] do_new_mount fs/namespace.c:2790 [inline]
    [<0000000012e90ac4>] do_mount+0x932/0xc50 fs/namespace.c:3110
    [<0000000055e18c39>] ksys_mount+0xab/0x120 fs/namespace.c:3319
    [<000000003fbb869f>] __do_sys_mount fs/namespace.c:3333 [inline]
    [<000000003fbb869f>] __se_sys_mount fs/namespace.c:3330 [inline]
    [<000000003fbb869f>] __x64_sys_mount+0x26/0x30 fs/namespace.c:3330
    [<000000005a440e8e>] do_syscall_64+0x76/0x1a0 arch/x86/entry/common.c:301
    [<0000000091465610>] entry_SYSCALL_64_after_hwframe+0x44/0xa9

BUG: memory leak
unreferenced object 0xffff888114735700 (size 32):
  comm "syz-executor234", pid 7227, jiffies 4294945629 (age 16.870s)
  hex dump (first 32 bytes):
    34 32 39 34 39 34 35 36 32 39 00 00 00 00 00 00  4294945629......
    00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00  ................
  backtrace:
    [<000000002cabdadb>] kmemleak_alloc_recursive include/linux/kmemleak.h:55 [inline]
    [<000000002cabdadb>] slab_post_alloc_hook mm/slab.h:439 [inline]
    [<000000002cabdadb>] slab_alloc mm/slab.c:3326 [inline]
    [<000000002cabdadb>] kmem_cache_alloc_trace+0x13d/0x280 mm/slab.c:3553
    [<00000000c9696bd2>] kmalloc include/linux/slab.h:547 [inline]
    [<00000000c9696bd2>] v9fs_random_cachetag fs/9p/cache.c:51 [inline]
    [<00000000c9696bd2>] v9fs_cache_session_get_cookie+0xa6/0x100 fs/9p/cache.c:67
    [<000000009f2e3d4c>] v9fs_session_init+0x5c3/0x880 fs/9p/v9fs.c:485
    [<000000003e76ac4c>] v9fs_mount+0x5e/0x3a0 fs/9p/vfs_super.c:135
    [<00000000de1b2937>] legacy_get_tree+0x27/0x80 fs/fs_context.c:665
    [<000000009d8e25aa>] vfs_get_tree+0x2e/0x120 fs/super.c:1476
    [<0000000012e90ac4>] do_new_mount fs/namespace.c:2790 [inline]
    [<0000000012e90ac4>] do_mount+0x932/0xc50 fs/namespace.c:3110
    [<0000000055e18c39>] ksys_mount+0xab/0x120 fs/namespace.c:3319
    [<000000003fbb869f>] __do_sys_mount fs/namespace.c:3333 [inline]
    [<000000003fbb869f>] __se_sys_mount fs/namespace.c:3330 [inline]
    [<000000003fbb869f>] __x64_sys_mount+0x26/0x30 fs/namespace.c:3330
    [<000000005a440e8e>] do_syscall_64+0x76/0x1a0 arch/x86/entry/common.c:301
    [<0000000091465610>] entry_SYSCALL_64_after_hwframe+0x44/0xa9

BUG: memory leak
unreferenced object 0xffff88811d5b7860 (size 32):
  comm "syz-executor234", pid 7225, jiffies 4294945634 (age 16.820s)
  hex dump (first 32 bytes):
    34 32 39 34 39 34 35 36 33 34 00 00 00 00 00 00  4294945634......
    00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00  ................
  backtrace:
    [<000000002cabdadb>] kmemleak_alloc_recursive include/linux/kmemleak.h:55 [inline]
    [<000000002cabdadb>] slab_post_alloc_hook mm/slab.h:439 [inline]
    [<000000002cabdadb>] slab_alloc mm/slab.c:3326 [inline]
    [<000000002cabdadb>] kmem_cache_alloc_trace+0x13d/0x280 mm/slab.c:3553
    [<00000000c9696bd2>] kmalloc include/linux/slab.h:547 [inline]
    [<00000000c9696bd2>] v9fs_random_cachetag fs/9p/cache.c:51 [inline]
    [<00000000c9696bd2>] v9fs_cache_session_get_cookie+0xa6/0x100 fs/9p/cache.c:67
    [<000000009f2e3d4c>] v9fs_session_init+0x5c3/0x880 fs/9p/v9fs.c:485
    [<000000003e76ac4c>] v9fs_mount+0x5e/0x3a0 fs/9p/vfs_super.c:135
    [<00000000de1b2937>] legacy_get_tree+0x27/0x80 fs/fs_context.c:665
    [<000000009d8e25aa>] vfs_get_tree+0x2e/0x120 fs/super.c:1476
    [<0000000012e90ac4>] do_new_mount fs/namespace.c:2790 [inline]
    [<0000000012e90ac4>] do_mount+0x932/0xc50 fs/namespace.c:3110
    [<0000000055e18c39>] ksys_mount+0xab/0x120 fs/namespace.c:3319
    [<000000003fbb869f>] __do_sys_mount fs/namespace.c:3333 [inline]
    [<000000003fbb869f>] __se_sys_mount fs/namespace.c:3330 [inline]
    [<000000003fbb869f>] __x64_sys_mount+0x26/0x30 fs/namespace.c:3330
    [<000000005a440e8e>] do_syscall_64+0x76/0x1a0 arch/x86/entry/common.c:301
    [<0000000091465610>] entry_SYSCALL_64_after_hwframe+0x44/0xa9

BUG: memory leak
unreferenced object 0xffff88811d5b7ce0 (size 32):
  comm "syz-executor234", pid 7220, jiffies 4294945629 (age 17.810s)
  hex dump (first 32 bytes):
    34 32 39 34 39 34 35 36 32 39 00 00 00 00 00 00  4294945629......
    00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00  ................
  backtrace:
    [<000000002cabdadb>] kmemleak_alloc_recursive include/linux/kmemleak.h:55 [inline]
    [<000000002cabdadb>] slab_post_alloc_hook mm/slab.h:439 [inline]
    [<000000002cabdadb>] slab_alloc mm/slab.c:3326 [inline]
    [<000000002cabdadb>] kmem_cache_alloc_trace+0x13d/0x280 mm/slab.c:3553
    [<00000000c9696bd2>] kmalloc include/linux/slab.h:547 [inline]
    [<00000000c9696bd2>] v9fs_random_cachetag fs/9p/cache.c:51 [inline]
    [<00000000c9696bd2>] v9fs_cache_session_get_cookie+0xa6/0x100 fs/9p/cache.c:67
    [<000000009f2e3d4c>] v9fs_session_init+0x5c3/0x880 fs/9p/v9fs.c:485
    [<000000003e76ac4c>] v9fs_mount+0x5e/0x3a0 fs/9p/vfs_super.c:135
    [<00000000de1b2937>] legacy_get_tree+0x27/0x80 fs/fs_context.c:665
    [<000000009d8e25aa>] vfs_get_tree+0x2e/0x120 fs/super.c:1476
    [<0000000012e90ac4>] do_new_mount fs/namespace.c:2790 [inline]
    [<0000000012e90ac4>] do_mount+0x932/0xc50 fs/namespace.c:3110
    [<0000000055e18c39>] ksys_mount+0xab/0x120 fs/namespace.c:3319
    [<000000003fbb869f>] __do_sys_mount fs/namespace.c:3333 [inline]
    [<000000003fbb869f>] __se_sys_mount fs/namespace.c:3330 [inline]
    [<000000003fbb869f>] __x64_sys_mount+0x26/0x30 fs/namespace.c:3330
    [<000000005a440e8e>] do_syscall_64+0x76/0x1a0 arch/x86/entry/common.c:301
    [<0000000091465610>] entry_SYSCALL_64_after_hwframe+0x44/0xa9

BUG: memory leak
unreferenced object 0xffff888114735700 (size 32):
  comm "syz-executor234", pid 7227, jiffies 4294945629 (age 17.810s)
  hex dump (first 32 bytes):
    34 32 39 34 39 34 35 36 32 39 00 00 00 00 00 00  4294945629......
    00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00  ................
  backtrace:
    [<000000002cabdadb>] kmemleak_alloc_recursive include/linux/kmemleak.h:55 [inline]
    [<000000002cabdadb>] slab_post_alloc_hook mm/slab.h:439 [inline]
    [<000000002cabdadb>] slab_alloc mm/slab.c:3326 [inline]
    [<000000002cabdadb>] kmem_cache_alloc_trace+0x13d/0x280 mm/slab.c:3553
    [<00000000c9696bd2>] kmalloc include/linux/slab.h:547 [inline]
    [<00000000c9696bd2>] v9fs_random_cachetag fs/9p/cache.c:51 [inline]
    [<00000000c9696bd2>] v9fs_cache_session_get_cookie+0xa6/0x100 fs/9p/cache.c:67
    [<000000009f2e3d4c>] v9fs_session_init+0x5c3/0x880 fs/9p/v9fs.c:485
    [<000000003e76ac4c>] v9fs_mount+0x5e/0x3a0 fs/9p/vfs_super.c:135
    [<00000000de1b2937>] legacy_get_tree+0x27/0x80 fs/fs_context.c:665
    [<000000009d8e25aa>] vfs_get_tree+0x2e/0x120 fs/super.c:1476
    [<0000000012e90ac4>] do_new_mount fs/namespace.c:2790 [inline]
    [<0000000012e90ac4>] do_mount+0x932/0xc50 fs/namespace.c:3110
    [<0000000055e18c39>] ksys_mount+0xab/0x120 fs/namespace.c:3319
    [<000000003fbb869f>] __do_sys_mount fs/namespace.c:3333 [inline]
    [<000000003fbb869f>] __se_sys_mount fs/namespace.c:3330 [inline]
    [<000000003fbb869f>] __x64_sys_mount+0x26/0x30 fs/namespace.c:3330
    [<000000005a440e8e>] do_syscall_64+0x76/0x1a0 arch/x86/entry/common.c:301
    [<0000000091465610>] entry_SYSCALL_64_after_hwframe+0x44/0xa9

BUG: memory leak
unreferenced object 0xffff88811d5b7860 (size 32):
  comm "syz-executor234", pid 7225, jiffies 4294945634 (age 17.760s)
  hex dump (first 32 bytes):
    34 32 39 34 39 34 35 36 33 34 00 00 00 00 00 00  4294945634......
    00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00  ................
  backtrace:
    [<000000002cabdadb>] kmemleak_alloc_recursive include/linux/kmemleak.h:55 [inline]
    [<000000002cabdadb>] slab_post_alloc_hook mm/slab.h:439 [inline]
    [<000000002cabdadb>] slab_alloc mm/slab.c:3326 [inline]
    [<000000002cabdadb>] kmem_cache_alloc_trace+0x13d/0x280 mm/slab.c:3553
    [<00000000c9696bd2>] kmalloc include/linux/slab.h:547 [inline]
    [<00000000c9696bd2>] v9fs_random_cachetag fs/9p/cache.c:51 [inline]
    [<00000000c9696bd2>] v9fs_cache_session_get_cookie+0xa6/0x100 fs/9p/cache.c:67
    [<000000009f2e3d4c>] v9fs_session_init+0x5c3/0x880 fs/9p/v9fs.c:485
    [<000000003e76ac4c>] v9fs_mount+0x5e/0x3a0 fs/9p/vfs_super.c:135
    [<00000000de1b2937>] legacy_get_tree+0x27/0x80 fs/fs_context.c:665
    [<000000009d8e25aa>] vfs_get_tree+0x2e/0x120 fs/super.c:1476
    [<0000000012e90ac4>] do_new_mount fs/namespace.c:2790 [inline]
    [<0000000012e90ac4>] do_mount+0x932/0xc50 fs/namespace.c:3110
    [<0000000055e18c39>] ksys_mount+0xab/0x120 fs/namespace.c:3319
    [<000000003fbb869f>] __do_sys_mount fs/namespace.c:3333 [inline]
    [<000000003fbb869f>] __se_sys_mount fs/namespace.c:3330 [inline]
    [<000000003fbb869f>] __x64_sys_mount+0x26/0x30 fs/namespace.c:3330
    [<000000005a440e8e>] do_syscall_64+0x76/0x1a0 arch/x86/entry/common.c:301
    [<0000000091465610>] entry_SYSCALL_64_after_hwframe+0x44/0xa9

BUG: memory leak
unreferenced object 0xffff88811d5b7ce0 (size 32):
  comm "syz-executor234", pid 7220, jiffies 4294945629 (age 18.730s)
  hex dump (first 32 bytes):
    34 32 39 34 39 34 35 36 32 39 00 00 00 00 00 00  4294945629......
    00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00  ................
  backtrace:
    [<000000002cabdadb>] kmemleak_alloc_recursive include/linux/kmemleak.h:55 [inline]
    [<000000002cabdadb>] slab_post_alloc_hook mm/slab.h:439 [inline]
    [<000000002cabdadb>] slab_alloc mm/slab.c:3326 [inline]
    [<000000002cabdadb>] kmem_cache_alloc_trace+0x13d/0x280 mm/slab.c:3553
    [<00000000c9696bd2>] kmalloc include/linux/slab.h:547 [inline]
    [<00000000c9696bd2>] v9fs_random_cachetag fs/9p/cache.c:51 [inline]
    [<00000000c9696bd2>] v9fs_cache_session_get_cookie+0xa6/0x100 fs/9p/cache.c:67
    [<000000009f2e3d4c>] v9fs_session_init+0x5c3/0x880 fs/9p/v9fs.c:485
    [<000000003e76ac4c>] v9fs_mount+0x5e/0x3a0 fs/9p/vfs_super.c:135
    [<00000000de1b2937>] legacy_get_tree+0x27/0x80 fs/fs_context.c:665
    [<000000009d8e25aa>] vfs_get_tree+0x2e/0x120 fs/super.c:1476
    [<0000000012e90ac4>] do_new_mount fs/namespace.c:2790 [inline]
    [<0000000012e90ac4>] do_mount+0x932/0xc50 fs/namespace.c:3110
    [<0000000055e18c39>] ksys_mount+0xab/0x120 fs/namespace.c:3319
    [<000000003fbb869f>] __do_sys_mount fs/namespace.c:3333 [inline]
    [<000000003fbb869f>] __se_sys_mount fs/namespace.c:3330 [inline]
    [<000000003fbb869f>] __x64_sys_mount+0x26/0x30 fs/namespace.c:3330
    [<000000005a440e8e>] do_syscall_64+0x76/0x1a0 arch/x86/entry/common.c:301
    [<0000000091465610>] entry_SYSCALL_64_after_hwframe+0x44/0xa9

BUG: memory leak
unreferenced object 0xffff888114735700 (size 32):
  comm "syz-executor234", pid 7227, jiffies 4294945629 (age 18.730s)
  hex dump (first 32 bytes):
    34 32 39 34 39 34 35 36 32 39 00 00 00 00 00 00  4294945629......
    00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00  ................
  backtrace:
    [<000000002cabdadb>] kmemleak_alloc_recursive include/linux/kmemleak.h:55 [inline]
    [<000000002cabdadb>] slab_post_alloc_hook mm/slab.h:439 [inline]
    [<000000002cabdadb>] slab_alloc mm/slab.c:3326 [inline]
    [<000000002cabdadb>] kmem_cache_alloc_trace+0x13d/0x280 mm/slab.c:3553
    [<00000000c9696bd2>] kmalloc include/linux/slab.h:547 [inline]
    [<00000000c9696bd2>] v9fs_random_cachetag fs/9p/cache.c:51 [inline]
    [<00000000c9696bd2>] v9fs_cache_session_get_cookie+0xa6/0x100 fs/9p/cache.c:67
    [<000000009f2e3d4c>] v9fs_session_init+0x5c3/0x880 fs/9p/v9fs.c:485
    [<000000003e76ac4c>] v9fs_mount+0x5e/0x3a0 fs/9p/vfs_super.c:135
    [<00000000de1b2937>] legacy_get_tree+0x27/0x80 fs/fs_context.c:665
    [<000000009d8e25aa>] vfs_get_tree+0x2e/0x120 fs/super.c:1476
    [<0000000012e90ac4>] do_new_mount fs/namespace.c:2790 [inline]
    [<0000000012e90ac4>] do_mount+0x932/0xc50 fs/namespace.c:3110
    [<0000000055e18c39>] ksys_mount+0xab/0x120 fs/namespace.c:3319
    [<000000003fbb869f>] __do_sys_mount fs/namespace.c:3333 [inline]
    [<000000003fbb869f>] __se_sys_mount fs/namespace.c:3330 [inline]
    [<000000003fbb869f>] __x64_sys_mount+0x26/0x30 fs/namespace.c:3330
    [<000000005a440e8e>] do_syscall_64+0x76/0x1a0 arch/x86/entry/common.c:301
    [<0000000091465610>] entry_SYSCALL_64_after_hwframe+0x44/0xa9

BUG: memory leak
unreferenced object 0xffff88811d5b7860 (size 32):
  comm "syz-executor234", pid 7225, jiffies 4294945634 (age 18.680s)
  hex dump (first 32 bytes):
    34 32 39 34 39 34 35 36 33 34 00 00 00 00 00 00  4294945634......
    00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00  ................
  backtrace:
    [<000000002cabdadb>] kmemleak_alloc_recursive include/linux/kmemleak.h:55 [inline]
    [<000000002cabdadb>] slab_post_alloc_hook mm/slab.h:439 [inline]
    [<000000002cabdadb>] slab_alloc mm/slab.c:3326 [inline]
    [<000000002cabdadb>] kmem_cache_alloc_trace+0x13d/0x280 mm/slab.c:3553
    [<00000000c9696bd2>] kmalloc include/linux/slab.h:547 [inline]
    [<00000000c9696bd2>] v9fs_random_cachetag fs/9p/cache.c:51 [inline]
    [<00000000c9696bd2>] v9fs_cache_session_get_cookie+0xa6/0x100 fs/9p/cache.c:67
    [<000000009f2e3d4c>] v9fs_session_init+0x5c3/0x880 fs/9p/v9fs.c:485
    [<000000003e76ac4c>] v9fs_mount+0x5e/0x3a0 fs/9p/vfs_super.c:135
    [<00000000de1b2937>] legacy_get_tree+0x27/0x80 fs/fs_context.c:665
    [<000000009d8e25aa>] vfs_get_tree+0x2e/0x120 fs/super.c:1476
    [<0000000012e90ac4>] do_new_mount fs/namespace.c:2790 [inline]
    [<0000000012e90ac4>] do_mount+0x932/0xc50 fs/namespace.c:3110
    [<0000000055e18c39>] ksys_mount+0xab/0x120 fs/namespace.c:3319
    [<000000003fbb869f>] __do_sys_mount fs/namespace.c:3333 [inline]
    [<000000003fbb869f>] __se_sys_mount fs/namespace.c:3330 [inline]
    [<000000003fbb869f>] __x64_sys_mount+0x26/0x30 fs/namespace.c:3330
    [<000000005a440e8e>] do_syscall_64+0x76/0x1a0 arch/x86/entry/common.c:301
    [<0000000091465610>] entry_SYSCALL_64_after_hwframe+0x44/0xa9

BUG: memory leak
unreferenced object 0xffff88811d5b7ce0 (size 32):
  comm "syz-executor234", pid 7220, jiffies 4294945629 (age 20.550s)
  hex dump (first 32 bytes):
    34 32 39 34 39 34 35 36 32 39 00 00 00 00 00 00  4294945629......
    00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00  ................
  backtrace:
    [<000000002cabdadb>] kmemleak_alloc_recursive include/linux/kmemleak.h:55 [inline]
    [<000000002cabdadb>] slab_post_alloc_hook mm/slab.h:439 [inline]
    [<000000002cabdadb>] slab_alloc mm/slab.c:3326 [inline]
    [<000000002cabdadb>] kmem_cache_alloc_trace+0x13d/0x280 mm/slab.c:3553
    [<00000000c9696bd2>] kmalloc include/linux/slab.h:547 [inline]
    [<00000000c9696bd2>] v9fs_random_cachetag fs/9p/cache.c:51 [inline]
    [<00000000c9696bd2>] v9fs_cache_session_get_cookie+0xa6/0x100 fs/9p/cache.c:67
    [<000000009f2e3d4c>] v9fs_session_init+0x5c3/0x880 fs/9p/v9fs.c:485
    [<000000003e76ac4c>] v9fs_mount+0x5e/0x3a0 fs/9p/vfs_super.c:135
    [<00000000de1b2937>] legacy_get_tree+0x27/0x80 fs/fs_context.c:665
    [<000000009d8e25aa>] vfs_get_tree+0x2e/0x120 fs/super.c:1476
    [<0000000012e90ac4>] do_new_mount fs/namespace.c:2790 [inline]
    [<0000000012e90ac4>] do_mount+0x932/0xc50 fs/namespace.c:3110
    [<0000000055e18c39>] ksys_mount+0xab/0x120 fs/namespace.c:3319
    [<000000003fbb869f>] __do_sys_mount fs/namespace.c:3333 [inline]
    [<000000003fbb869f>] __se_sys_mount fs/namespace.c:3330 [inline]
    [<000000003fbb869f>] __x64_sys_mount+0x26/0x30 fs/namespace.c:3330
    [<000000005a440e8e>] do_syscall_64+0x76/0x1a0 arch/x86/entry/common.c:301
    [<0000000091465610>] entry_SYSCALL_64_after_hwframe+0x44/0xa9

BUG: memory leak
unreferenced object 0xffff888114735700 (size 32):
  comm "syz-executor234", pid 7227, jiffies 4294945629 (age 20.550s)
  hex dump (first 32 bytes):
    34 32 39 34 39 34 35 36 32 39 00 00 00 00 00 00  4294945629......
    00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00  ................
  backtrace:
    [<000000002cabdadb>] kmemleak_alloc_recursive include/linux/kmemleak.h:55 [inline]
    [<000000002cabdadb>] slab_post_alloc_hook mm/slab.h:439 [inline]
    [<000000002cabdadb>] slab_alloc mm/slab.c:3326 [inline]
    [<000000002cabdadb>] kmem_cache_alloc_trace+0x13d/0x280 mm/slab.c:3553
    [<00000000c9696bd2>] kmalloc include/linux/slab.h:547 [inline]
    [<00000000c9696bd2>] v9fs_random_cachetag fs/9p/cache.c:51 [inline]
    [<00000000c9696bd2>] v9fs_cache_session_get_cookie+0xa6/0x100 fs/9p/cache.c:67
    [<000000009f2e3d4c>] v9fs_session_init+0x5c3/0x880 fs/9p/v9fs.c:485
    [<000000003e76ac4c>] v9fs_mount+0x5e/0x3a0 fs/9p/vfs_super.c:135
    [<00000000de1b2937>] legacy_get_tree+0x27/0x80 fs/fs_context.c:665
    [<000000009d8e25aa>] vfs_get_tree+0x2e/0x120 fs/super.c:1476
    [<0000000012e90ac4>] do_new_mount fs/namespace.c:2790 [inline]
    [<0000000012e90ac4>] do_mount+0x932/0xc50 fs/namespace.c:3110
    [<0000000055e18c39>] ksys_mount+0xab/0x120 fs/namespace.c:3319
    [<000000003fbb869f>] __do_sys_mount fs/namespace.c:3333 [inline]
    [<000000003fbb869f>] __se_sys_mount fs/namespace.c:3330 [inline]
    [<000000003fbb869f>] __x64_sys_mount+0x26/0x30 fs/namespace.c:3330
    [<000000005a440e8e>] do_syscall_64+0x76/0x1a0 arch/x86/entry/common.c:301
    [<0000000091465610>] entry_SYSCALL_64_after_hwframe+0x44/0xa9

BUG: memory leak
unreferenced object 0xffff88811d5b7860 (size 32):
  comm "syz-executor234", pid 7225, jiffies 4294945634 (age 20.510s)
  hex dump (first 32 bytes):
    34 32 39 34 39 34 35 36 33 34 00 00 00 00 00 00  4294945634......
    00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00  ................
  backtrace:
    [<000000002cabdadb>] kmemleak_alloc_recursive include/linux/kmemleak.h:55 [inline]
    [<000000002cabdadb>] slab_post_alloc_hook mm/slab.h:439 [inline]
    [<000000002cabdadb>] slab_alloc mm/slab.c:3326 [inline]
    [<000000002cabdadb>] kmem_cache_alloc_trace+0x13d/0x280 mm/slab.c:3553
    [<00000000c9696bd2>] kmalloc include/linux/slab.h:547 [inline]
    [<00000000c9696bd2>] v9fs_random_cachetag fs/9p/cache.c:51 [inline]
    [<00000000c9696bd2>] v9fs_cache_session_get_cookie+0xa6/0x100 fs/9p/cache.c:67
    [<000000009f2e3d4c>] v9fs_session_init+0x5c3/0x880 fs/9p/v9fs.c:485
    [<000000003e76ac4c>] v9fs_mount+0x5e/0x3a0 fs/9p/vfs_super.c:135
    [<00000000de1b2937>] legacy_get_tree+0x27/0x80 fs/fs_context.c:665
    [<000000009d8e25aa>] vfs_get_tree+0x2e/0x120 fs/super.c:1476
    [<0000000012e90ac4>] do_new_mount fs/namespace.c:2790 [inline]
    [<0000000012e90ac4>] do_mount+0x932/0xc50 fs/namespace.c:3110
    [<0000000055e18c39>] ksys_mount+0xab/0x120 fs/namespace.c:3319
    [<000000003fbb869f>] __do_sys_mount fs/namespace.c:3333 [inline]
    [<000000003fbb869f>] __se_sys_mount fs/namespace.c:3330 [inline]
    [<000000003fbb869f>] __x64_sys_mount+0x26/0x30 fs/namespace.c:3330
    [<000000005a440e8e>] do_syscall_64+0x76/0x1a0 arch/x86/entry/common.c:301
    [<0000000091465610>] entry_SYSCALL_64_after_hwframe+0x44/0xa9

BUG: memory leak
unreferenced object 0xffff88811d5b7ce0 (size 32):
  comm "syz-executor234", pid 7220, jiffies 4294945629 (age 21.520s)
  hex dump (first 32 bytes):
    34 32 39 34 39 34 35 36 32 39 00 00 00 00 00 00  4294945629......
    00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00  ................
  backtrace:
    [<000000002cabdadb>] kmemleak_alloc_recursive include/linux/kmemleak.h:55 [inline]
    [<000000002cabdadb>] slab_post_alloc_hook mm/slab.h:439 [inline]
    [<000000002cabdadb>] slab_alloc mm/slab.c:3326 [inline]
    [<000000002cabdadb>] kmem_cache_alloc_trace+0x13d/0x280 mm/slab.c:3553
    [<00000000c9696bd2>] kmalloc include/linux/slab.h:547 [inline]
    [<00000000c9696bd2>] v9fs_random_cachetag fs/9p/cache.c:51 [inline]
    [<00000000c9696bd2>] v9fs_cache_session_get_cookie+0xa6/0x100 fs/9p/cache.c:67
    [<000000009f2e3d4c>] v9fs_session_init+0x5c3/0x880 fs/9p/v9fs.c:485
    [<000000003e76ac4c>] v9fs_mount+0x5e/0x3a0 fs/9p/vfs_super.c:135
    [<00000000de1b2937>] legacy_get_tree+0x27/0x80 fs/fs_context.c:665
    [<000000009d8e25aa>] vfs_get_tree+0x2e/0x120 fs/super.c:1476
    [<0000000012e90ac4>] do_new_mount fs/namespace.c:2790 [inline]
    [<0000000012e90ac4>] do_mount+0x932/0xc50 fs/namespace.c:3110
    [<0000000055e18c39>] ksys_mount+0xab/0x120 fs/namespace.c:3319
    [<000000003fbb869f>] __do_sys_mount fs/namespace.c:3333 [inline]
    [<000000003fbb869f>] __se_sys_mount fs/namespace.c:3330 [inline]
    [<000000003fbb869f>] __x64_sys_mount+0x26/0x30 fs/namespace.c:3330
    [<000000005a440e8e>] do_syscall_64+0x76/0x1a0 arch/x86/entry/common.c:301
    [<0000000091465610>] entry_SYSCALL_64_after_hwframe+0x44/0xa9

BUG: memory leak
unreferenced object 0xffff888114735700 (size 32):
  comm "syz-executor234", pid 7227, jiffies 4294945629 (age 21.520s)
  hex dump (first 32 bytes):
    34 32 39 34 39 34 35 36 32 39 00 00 00 00 00 00  4294945629......
    00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00  ................
  backtrace:
    [<000000002cabdadb>] kmemleak_alloc_recursive include/linux/kmemleak.h:55 [inline]
    [<000000002cabdadb>] slab_post_alloc_hook mm/slab.h:439 [inline]
    [<000000002cabdadb>] slab_alloc mm/slab.c:3326 [inline]
    [<000000002cabdadb>] kmem_cache_alloc_trace+0x13d/0x280 mm/slab.c:3553
    [<00000000c9696bd2>] kmalloc include/linux/slab.h:547 [inline]
    [<00000000c9696bd2>] v9fs_random_cachetag fs/9p/cache.c:51 [inline]
    [<00000000c9696bd2>] v9fs_cache_session_get_cookie+0xa6/0x100 fs/9p/cache.c:67
    [<000000009f2e3d4c>] v9fs_session_init+0x5c3/0x880 fs/9p/v9fs.c:485
    [<000000003e76ac4c>] v9fs_mount+0x5e/0x3a0 fs/9p/vfs_super.c:135
    [<00000000de1b2937>] legacy_get_tree+0x27/0x80 fs/fs_context.c:665
    [<000000009d8e25aa>] vfs_get_tree+0x2e/0x120 fs/super.c:1476
    [<0000000012e90ac4>] do_new_mount fs/namespace.c:2790 [inline]
    [<0000000012e90ac4>] do_mount+0x932/0xc50 fs/namespace.c:3110
    [<0000000055e18c39>] ksys_mount+0xab/0x120 fs/namespace.c:3319
    [<000000003fbb869f>] __do_sys_mount fs/namespace.c:3333 [inline]
    [<000000003fbb869f>] __se_sys_mount fs/namespace.c:3330 [inline]
    [<000000003fbb869f>] __x64_sys_mount+0x26/0x30 fs/namespace.c:3330
    [<000000005a440e8e>] do_syscall_64+0x76/0x1a0 arch/x86/entry/common.c:301
    [<0000000091465610>] entry_SYSCALL_64_after_hwframe+0x44/0xa9

BUG: memory leak
unreferenced object 0xffff88811d5b7860 (size 32):
  comm "syz-executor234", pid 7225, jiffies 4294945634 (age 21.470s)
  hex dump (first 32 bytes):
    34 32 39 34 39 34 35 36 33 34 00 00 00 00 00 00  4294945634......
    00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00  ................
  backtrace:
    [<000000002cabdadb>] kmemleak_alloc_recursive include/linux/kmemleak.h:55 [inline]
    [<000000002cabdadb>] slab_post_alloc_hook mm/slab.h:439 [inline]
    [<000000002cabdadb>] slab_alloc mm/slab.c:3326 [inline]
    [<000000002cabdadb>] kmem_cache_alloc_trace+0x13d/0x280 mm/slab.c:3553
    [<00000000c9696bd2>] kmalloc include/linux/slab.h:547 [inline]
    [<00000000c9696bd2>] v9fs_random_cachetag fs/9p/cache.c:51 [inline]
    [<00000000c9696bd2>] v9fs_cache_session_get_cookie+0xa6/0x100 fs/9p/cache.c:67
    [<000000009f2e3d4c>] v9fs_session_init+0x5c3/0x880 fs/9p/v9fs.c:485
    [<000000003e76ac4c>] v9fs_mount+0x5e/0x3a0 fs/9p/vfs_super.c:135
    [<00000000de1b2937>] legacy_get_tree+0x27/0x80 fs/fs_context.c:665
    [<000000009d8e25aa>] vfs_get_tree+0x2e/0x120 fs/super.c:1476
    [<0000000012e90ac4>] do_new_mount fs/namespace.c:2790 [inline]
    [<0000000012e90ac4>] do_mount+0x932/0xc50 fs/namespace.c:3110
    [<0000000055e18c39>] ksys_mount+0xab/0x120 fs/namespace.c:3319
    [<000000003fbb869f>] __do_sys_mount fs/namespace.c:3333 [inline]
    [<000000003fbb869f>] __se_sys_mount fs/namespace.c:3330 [inline]
    [<000000003fbb869f>] __x64_sys_mount+0x26/0x30 fs/namespace.c:3330
    [<000000005a440e8e>] do_syscall_64+0x76/0x1a0 arch/x86/entry/common.c:301
    [<0000000091465610>] entry_SYSCALL_64_after_hwframe+0x44/0xa9

BUG: memory leak
unreferenced object 0xffff88811d5b7ce0 (size 32):
  comm "syz-executor234", pid 7220, jiffies 4294945629 (age 23.430s)
  hex dump (first 32 bytes):
    34 32 39 34 39 34 35 36 32 39 00 00 00 00 00 00  4294945629......
    00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00  ................
  backtrace:
    [<000000002cabdadb>] kmemleak_alloc_recursive include/linux/kmemleak.h:55 [inline]
    [<000000002cabdadb>] slab_post_alloc_hook mm/slab.h:439 [inline]
    [<000000002cabdadb>] slab_alloc mm/slab.c:3326 [inline]
    [<000000002cabdadb>] kmem_cache_alloc_trace+0x13d/0x280 mm/slab.c:3553
    [<00000000c9696bd2>] kmalloc include/linux/slab.h:547 [inline]
    [<00000000c9696bd2>] v9fs_random_cachetag fs/9p/cache.c:51 [inline]
    [<00000000c9696bd2>] v9fs_cache_session_get_cookie+0xa6/0x100 fs/9p/cache.c:67
    [<000000009f2e3d4c>] v9fs_session_init+0x5c3/0x880 fs/9p/v9fs.c:485
    [<000000003e76ac4c>] v9fs_mount+0x5e/0x3a0 fs/9p/vfs_super.c:135
    [<00000000de1b2937>] legacy_get_tree+0x27/0x80 fs/fs_context.c:665
    [<000000009d8e25aa>] vfs_get_tree+0x2e/0x120 fs/super.c:1476
    [<0000000012e90ac4>] do_new_mount fs/namespace.c:2790 [inline]
    [<0000000012e90ac4>] do_mount+0x932/0xc50 fs/namespace.c:3110
    [<0000000055e18c39>] ksys_mount+0xab/0x120 fs/namespace.c:3319
    [<000000003fbb869f>] __do_sys_mount fs/namespace.c:3333 [inline]
    [<000000003fbb869f>] __se_sys_mount fs/namespace.c:3330 [inline]
    [<000000003fbb869f>] __x64_sys_mount+0x26/0x30 fs/namespace.c:3330
    [<000000005a440e8e>] do_syscall_64+0x76/0x1a0 arch/x86/entry/common.c:301
    [<0000000091465610>] entry_SYSCALL_64_after_hwframe+0x44/0xa9

BUG: memory leak
unreferenced object 0xffff888114735700 (size 32):
  comm "syz-executor234", pid 7227, jiffies 4294945629 (age 23.430s)
  hex dump (first 32 bytes):
    34 32 39 34 39 34 35 36 32 39 00 00 00 00 00 00  4294945629......
    00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00  ................
  backtrace:
    [<000000002cabdadb>] kmemleak_alloc_recursive include/linux/kmemleak.h:55 [inline]
    [<000000002cabdadb>] slab_post_alloc_hook mm/slab.h:439 [inline]
    [<000000002cabdadb>] slab_alloc mm/slab.c:3326 [inline]
    [<000000002cabdadb>] kmem_cache_alloc_trace+0x13d/0x280 mm/slab.c:3553
    [<00000000c9696bd2>] kmalloc include/linux/slab.h:547 [inline]
    [<00000000c9696bd2>] v9fs_random_cachetag fs/9p/cache.c:51 [inline]
    [<00000000c9696bd2>] v9fs_cache_session_get_cookie+0xa6/0x100 fs/9p/cache.c:67
    [<000000009f2e3d4c>] v9fs_session_init+0x5c3/0x880 fs/9p/v9fs.c:485
    [<000000003e76ac4c>] v9fs_mount+0x5e/0x3a0 fs/9p/vfs_super.c:135
    [<00000000de1b2937>] legacy_get_tree+0x27/0x80 fs/fs_context.c:665
    [<000000009d8e25aa>] vfs_get_tree+0x2e/0x120 fs/super.c:1476
    [<0000000012e90ac4>] do_new_mount fs/namespace.c:2790 [inline]
    [<0000000012e90ac4>] do_mount+0x932/0xc50 fs/namespace.c:3110
    [<0000000055e18c39>] ksys_mount+0xab/0x120 fs/namespace.c:3319
    [<000000003fbb869f>] __do_sys_mount fs/namespace.c:3333 [inline]
    [<000000003fbb869f>] __se_sys_mount fs/namespace.c:3330 [inline]
    [<000000003fbb869f>] __x64_sys_mount+0x26/0x30 fs/namespace.c:3330
    [<000000005a440e8e>] do_syscall_64+0x76/0x1a0 arch/x86/entry/common.c:301
    [<0000000091465610>] entry_SYSCALL_64_after_hwframe+0x44/0xa9

BUG: memory leak
unreferenced object 0xffff88811d5b7860 (size 32):
  comm "syz-executor234", pid 7225, jiffies 4294945634 (age 23.380s)
  hex dump (first 32 bytes):
    34 32 39 34 39 34 35 36 33 34 00 00 00 00 00 00  4294945634......
    00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00  ................
  backtrace:
    [<000000002cabdadb>] kmemleak_alloc_recursive include/linux/kmemleak.h:55 [inline]
    [<000000002cabdadb>] slab_post_alloc_hook mm/slab.h:439 [inline]
    [<000000002cabdadb>] slab_alloc mm/slab.c:3326 [inline]
    [<000000002cabdadb>] kmem_cache_alloc_trace+0x13d/0x280 mm/slab.c:3553
    [<00000000c9696bd2>] kmalloc include/linux/slab.h:547 [inline]
    [<00000000c9696bd2>] v9fs_random_cachetag fs/9p/cache.c:51 [inline]
    [<00000000c9696bd2>] v9fs_cache_session_get_cookie+0xa6/0x100 fs/9p/cache.c:67
    [<000000009f2e3d4c>] v9fs_session_init+0x5c3/0x880 fs/9p/v9fs.c:485
    [<000000003e76ac4c>] v9fs_mount+0x5e/0x3a0 fs/9p/vfs_super.c:135
    [<00000000de1b2937>] legacy_get_tree+0x27/0x80 fs/fs_context.c:665
    [<000000009d8e25aa>] vfs_get_tree+0x2e/0x120 fs/super.c:1476
    [<0000000012e90ac4>] do_new_mount fs/namespace.c:2790 [inline]
    [<0000000012e90ac4>] do_mount+0x932/0xc50 fs/namespace.c:3110
    [<0000000055e18c39>] ksys_mount+0xab/0x120 fs/namespace.c:3319
    [<000000003fbb869f>] __do_sys_mount fs/namespace.c:3333 [inline]
    [<000000003fbb869f>] __se_sys_mount fs/namespace.c:3330 [inline]
    [<000000003fbb869f>] __x64_sys_mount+0x26/0x30 fs/namespace.c:3330
    [<000000005a440e8e>] do_syscall_64+0x76/0x1a0 arch/x86/entry/common.c:301
    [<0000000091465610>] entry_SYSCALL_64_after_hwframe+0x44/0xa9

executing program
executing program
executing program
executing program
executing program
executing program
executing program

All crashes (15):
Manager	Time	Kernel	Commit	Syzkaller	Config	Log	Report	Syz repro	C repro	Maintainers
ci-upstream-gce-leak	2019/05/20 20:49	upstream	f49aa1de	8285069f	.config	log	report	syz	C	asmadeus@codewreck.org, ericvh@gmail.com, linux-kernel@vger.kernel.org, lucho@ionkov.net, v9fs-developer@lists.sourceforge.net
ci-upstream-gce-leak	2019/06/14 03:49	upstream	c11fb13a	a139f92f	.config	log	report	syz	C	asmadeus@codewreck.org, ericvh@gmail.com, linux-kernel@vger.kernel.org, lucho@ionkov.net, v9fs-developer@lists.sourceforge.net
ci-upstream-gce-leak	2019/06/13 21:14	upstream	c11fb13a	a139f92f	.config	log	report	syz	C	asmadeus@codewreck.org, ericvh@gmail.com, linux-kernel@vger.kernel.org, lucho@ionkov.net, v9fs-developer@lists.sourceforge.net
ci-upstream-gce-leak	2019/06/13 09:32	upstream	b076173a	3f4e812b	.config	log	report	syz	C	asmadeus@codewreck.org, ericvh@gmail.com, linux-kernel@vger.kernel.org, lucho@ionkov.net, v9fs-developer@lists.sourceforge.net
ci-upstream-gce-leak	2019/06/05 17:27	upstream	788a0249	bfb4a51e	.config	log	report	syz	C	asmadeus@codewreck.org, ericvh@gmail.com, linux-kernel@vger.kernel.org, lucho@ionkov.net, v9fs-developer@lists.sourceforge.net
ci-upstream-gce-leak	2019/06/02 02:05	upstream	3ab4436f	53c81ea5	.config	log	report	syz	C	asmadeus@codewreck.org, ericvh@gmail.com, linux-kernel@vger.kernel.org, lucho@ionkov.net, v9fs-developer@lists.sourceforge.net
ci-upstream-gce-leak	2019/05/25 09:54	upstream	c50bbf61	85c57315	.config	log	report	syz	C	asmadeus@codewreck.org, ericvh@gmail.com, linux-kernel@vger.kernel.org, lucho@ionkov.net, v9fs-developer@lists.sourceforge.net
ci-upstream-gce-leak	2019/05/24 08:02	upstream	4dde821e	0dadcd9d	.config	log	report	syz	C	asmadeus@codewreck.org, ericvh@gmail.com, linux-kernel@vger.kernel.org, lucho@ionkov.net, v9fs-developer@lists.sourceforge.net
ci-upstream-gce-leak	2019/05/23 20:23	upstream	61686afe	0dadcd9d	.config	log	report	syz	C	asmadeus@codewreck.org, ericvh@gmail.com, linux-kernel@vger.kernel.org, lucho@ionkov.net, v9fs-developer@lists.sourceforge.net
ci-upstream-gce-leak	2019/05/23 17:40	upstream	61686afe	0dadcd9d	.config	log	report	syz	C	asmadeus@codewreck.org, ericvh@gmail.com, linux-kernel@vger.kernel.org, lucho@ionkov.net, v9fs-developer@lists.sourceforge.net
ci-upstream-gce-leak	2019/05/23 05:55	upstream	54dee406	84b9d384	.config	log	report	syz	C	asmadeus@codewreck.org, ericvh@gmail.com, linux-kernel@vger.kernel.org, lucho@ionkov.net, v9fs-developer@lists.sourceforge.net
ci-upstream-gce-leak	2019/05/23 02:26	upstream	54dee406	84b9d384	.config	log	report	syz	C	asmadeus@codewreck.org, ericvh@gmail.com, linux-kernel@vger.kernel.org, lucho@ionkov.net, v9fs-developer@lists.sourceforge.net
ci-upstream-gce-leak	2019/05/22 17:03	upstream	9c7db500	84b9d384	.config	log	report	syz	C	asmadeus@codewreck.org, ericvh@gmail.com, linux-kernel@vger.kernel.org, lucho@ionkov.net, v9fs-developer@lists.sourceforge.net
ci-upstream-gce-leak	2019/05/21 21:36	upstream	5bdd9ad8	13427bd9	.config	log	report	syz	C	asmadeus@codewreck.org, ericvh@gmail.com, linux-kernel@vger.kernel.org, lucho@ionkov.net, v9fs-developer@lists.sourceforge.net
ci-upstream-gce-leak	2019/05/30 21:34	upstream	bec7550c	d9aaf3c2	.config	log	report	syz		asmadeus@codewreck.org, ericvh@gmail.com, linux-kernel@vger.kernel.org, lucho@ionkov.net, v9fs-developer@lists.sourceforge.net