Messages in this thread | | | Date | Sat, 11 Jan 2020 09:19:09 -0800 | Subject | Re: memory leak in erase_aeb | From | syzbot <> |
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syzbot has found a reproducer for the following crash on:
HEAD commit: bef1d882 Merge tag 'pstore-v5.5-rc6' of git://git.kernel.o.. git tree: upstream console output: https://syzkaller.appspot.com/x/log.txt?x=158a51b9e00000 kernel config: https://syzkaller.appspot.com/x/.config?x=e479cb92d5ce3196 dashboard link: https://syzkaller.appspot.com/bug?extid=f317896aae32eb281a58 compiler: gcc (GCC) 9.0.0 20181231 (experimental) syz repro: https://syzkaller.appspot.com/x/repro.syz?x=132269e1e00000 C reproducer: https://syzkaller.appspot.com/x/repro.c?x=1247d58ee00000
IMPORTANT: if you fix the bug, please add the following tag to the commit: Reported-by: syzbot+f317896aae32eb281a58@syzkaller.appspotmail.com
BUG: memory leak unreferenced object 0xffff888127cecb00 (size 32): comm "syz-executor527", pid 7144, jiffies 4294957528 (age 23.750s) hex dump (first 32 bytes): 00 01 00 00 00 00 ad de 22 01 00 00 00 00 ad de ........"....... 00 00 00 00 00 00 00 00 01 00 00 00 02 00 00 00 ................ backtrace: [<0000000029f9ef6c>] kmemleak_alloc_recursive include/linux/kmemleak.h:43 [inline] [<0000000029f9ef6c>] slab_post_alloc_hook mm/slab.h:586 [inline] [<0000000029f9ef6c>] slab_alloc mm/slab.c:3320 [inline] [<0000000029f9ef6c>] kmem_cache_alloc+0x13f/0x2c0 mm/slab.c:3484 [<000000003092c936>] erase_aeb+0x2a/0x100 drivers/mtd/ubi/wl.c:1691 [<00000000d507b66e>] ubi_wl_init+0x1ae/0x600 drivers/mtd/ubi/wl.c:1758 [<0000000072e7d762>] ubi_attach+0x665/0x18e7 drivers/mtd/ubi/attach.c:1605 [<0000000024d645cb>] ubi_attach_mtd_dev+0x5b3/0xd40 drivers/mtd/ubi/build.c:946 [<00000000e6600cef>] ctrl_cdev_ioctl+0x149/0x1c0 drivers/mtd/ubi/cdev.c:1043 [<000000001253992f>] vfs_ioctl fs/ioctl.c:47 [inline] [<000000001253992f>] file_ioctl fs/ioctl.c:545 [inline] [<000000001253992f>] do_vfs_ioctl+0x551/0x890 fs/ioctl.c:732 [<00000000c49e8c94>] ksys_ioctl+0x86/0xb0 fs/ioctl.c:749 [<00000000261db07c>] __do_sys_ioctl fs/ioctl.c:756 [inline] [<00000000261db07c>] __se_sys_ioctl fs/ioctl.c:754 [inline] [<00000000261db07c>] __x64_sys_ioctl+0x1e/0x30 fs/ioctl.c:754 [<000000004f01dc3e>] do_syscall_64+0x73/0x220 arch/x86/entry/common.c:294 [<000000002de81d29>] entry_SYSCALL_64_after_hwframe+0x44/0xa9
BUG: memory leak unreferenced object 0xffff888127cecb00 (size 32): comm "syz-executor527", pid 7144, jiffies 4294957528 (age 26.350s) hex dump (first 32 bytes): 00 01 00 00 00 00 ad de 22 01 00 00 00 00 ad de ........"....... 00 00 00 00 00 00 00 00 01 00 00 00 02 00 00 00 ................ backtrace: [<0000000029f9ef6c>] kmemleak_alloc_recursive include/linux/kmemleak.h:43 [inline] [<0000000029f9ef6c>] slab_post_alloc_hook mm/slab.h:586 [inline] [<0000000029f9ef6c>] slab_alloc mm/slab.c:3320 [inline] [<0000000029f9ef6c>] kmem_cache_alloc+0x13f/0x2c0 mm/slab.c:3484 [<000000003092c936>] erase_aeb+0x2a/0x100 drivers/mtd/ubi/wl.c:1691 [<00000000d507b66e>] ubi_wl_init+0x1ae/0x600 drivers/mtd/ubi/wl.c:1758 [<0000000072e7d762>] ubi_attach+0x665/0x18e7 drivers/mtd/ubi/attach.c:1605 [<0000000024d645cb>] ubi_attach_mtd_dev+0x5b3/0xd40 drivers/mtd/ubi/build.c:946 [<00000000e6600cef>] ctrl_cdev_ioctl+0x149/0x1c0 drivers/mtd/ubi/cdev.c:1043 [<000000001253992f>] vfs_ioctl fs/ioctl.c:47 [inline] [<000000001253992f>] file_ioctl fs/ioctl.c:545 [inline] [<000000001253992f>] do_vfs_ioctl+0x551/0x890 fs/ioctl.c:732 [<00000000c49e8c94>] ksys_ioctl+0x86/0xb0 fs/ioctl.c:749 [<00000000261db07c>] __do_sys_ioctl fs/ioctl.c:756 [inline] [<00000000261db07c>] __se_sys_ioctl fs/ioctl.c:754 [inline] [<00000000261db07c>] __x64_sys_ioctl+0x1e/0x30 fs/ioctl.c:754 [<000000004f01dc3e>] do_syscall_64+0x73/0x220 arch/x86/entry/common.c:294 [<000000002de81d29>] entry_SYSCALL_64_after_hwframe+0x44/0xa9
BUG: memory leak unreferenced object 0xffff888127cecb00 (size 32): comm "syz-executor527", pid 7144, jiffies 4294957528 (age 32.820s) hex dump (first 32 bytes): 00 01 00 00 00 00 ad de 22 01 00 00 00 00 ad de ........"....... 00 00 00 00 00 00 00 00 01 00 00 00 02 00 00 00 ................ backtrace: [<0000000029f9ef6c>] kmemleak_alloc_recursive include/linux/kmemleak.h:43 [inline] [<0000000029f9ef6c>] slab_post_alloc_hook mm/slab.h:586 [inline] [<0000000029f9ef6c>] slab_alloc mm/slab.c:3320 [inline] [<0000000029f9ef6c>] kmem_cache_alloc+0x13f/0x2c0 mm/slab.c:3484 [<000000003092c936>] erase_aeb+0x2a/0x100 drivers/mtd/ubi/wl.c:1691 [<00000000d507b66e>] ubi_wl_init+0x1ae/0x600 drivers/mtd/ubi/wl.c:1758 [<0000000072e7d762>] ubi_attach+0x665/0x18e7 drivers/mtd/ubi/attach.c:1605 [<0000000024d645cb>] ubi_attach_mtd_dev+0x5b3/0xd40 drivers/mtd/ubi/build.c:946 [<00000000e6600cef>] ctrl_cdev_ioctl+0x149/0x1c0 drivers/mtd/ubi/cdev.c:1043 [<000000001253992f>] vfs_ioctl fs/ioctl.c:47 [inline] [<000000001253992f>] file_ioctl fs/ioctl.c:545 [inline] [<000000001253992f>] do_vfs_ioctl+0x551/0x890 fs/ioctl.c:732 [<00000000c49e8c94>] ksys_ioctl+0x86/0xb0 fs/ioctl.c:749 [<00000000261db07c>] __do_sys_ioctl fs/ioctl.c:756 [inline] [<00000000261db07c>] __se_sys_ioctl fs/ioctl.c:754 [inline] [<00000000261db07c>] __x64_sys_ioctl+0x1e/0x30 fs/ioctl.c:754 [<000000004f01dc3e>] do_syscall_64+0x73/0x220 arch/x86/entry/common.c:294 [<000000002de81d29>] entry_SYSCALL_64_after_hwframe+0x44/0xa9
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