From: Quanyang Wang
Hi Bruce,
Would you please help merge this patch to the branches for:
linux-yocto v5.2/standard/base
linux-yocto-dev standard/base
This patch fixes a bug:
when using MMC card with btrfs filesystem to be root device, kernel will crash
and the log as below:
mmc0: new high speed SDHC card at address
#0: DisplayPort monitor
Waiting 5 sec before mounting root device...
mmcblk0: mmc0: SC32G 29.7 GiB
mmcblk0: p1 p2 p3 p4
[drm] Cannot find any crtc or sizes
md: Waiting for all devices to be available before autodetect
md: If you don't use raid, use raid=noautodetect
md: Autodetecting RAID arrays.
md: autorun ...
md: ... autorun DONE.
yaffs: dev is 187695107 name is "mmcblk0p3" rw
yaffs: passed flags ""
yaffs: dev is 187695107 name is "mmcblk0p3" rw
yaffs: passed flags ""
[ cut here ]
kernel BUG at fs/yaffs2/yaffs_getblockinfo.h:30!
Internal error: Oops - BUG: 0 [#1] PREEMPT SMP
Modules linked in:
CPU: 3 PID: 1 Comm: swapper/0 Not tainted 5.2.24-yocto-standard+ #250
Hardware name: ZynqMP ZCU102 Rev1.0 (DT)
pstate: 8005 (Nzcv daif -PAN -UAO)
pc : yaffs_rd_chunk_tags_nand+0xf0/0x110
lr : yaffs_rd_chunk_tags_nand+0x108/0x110
sp : ff801003b770
x29: ff801003b770 x28: ffc876fe8000
x27: 000c x26:
x25: ffe1 x24: 0001
x23: x22: ff8011228000
x21: 005f x20: ff801003b890
x19: ffc876fe8000 x18:
x17: x16:
x15: ff80112285c8 x14: ff801137d228
x13: ff801137ce74 x12: ff8011246000
x11: x10: ff801137c000
x9 : x8 : 0007
x7 : 015c x6 : ff801137c490
x5 : x4 :
x3 : x2 : 50c80792e0663400
x1 : x0 : 0037
Call trace:
yaffs_rd_chunk_tags_nand+0xf0/0x110
yaffs_summary_read+0x10c/0x2e0
yaffs2_scan_backwards+0x28c/0xf58
yaffs_guts_initialise+0x71c/0x7a0
yaffs_internal_read_super.isra.20+0x4ec/0x838
yaffs2_internal_read_super_mtd+0x2c/0x48
mount_bdev+0x1a4/0x1e0
yaffs2_mount+0x44/0x58
legacy_get_tree+0x34/0x60
vfs_get_tree+0x34/0x120
do_mount+0x708/0x980
ksys_mount+0x9c/0x110
mount_block_root+0x128/0x29c
mount_root+0x148/0x17c
prepare_namespace+0x178/0x1c0
kernel_init_freeable+0x370/0x390
kernel_init+0x18/0x110
ret_from_fork+0x10/0x1c
Code: d65f03c0 f00069c0 b9440400 37f00060 (d421)
---[ end trace 68aa0995bdf59f76 ]---
BUG: sleeping function called from invalid context at
./include/linux/percpu-rwsem.h:34
in_atomic(): 1, irqs_disabled(): 128, pid: 1, name: swapper/0
Preemption disabled at:
[] debug_exception_enter+0x30/0x40
CPU: 3 PID: 1 Comm: swapper/0 Tainted: G D
5.2.24-yocto-standard+ #250
Hardware name: ZynqMP ZCU102 Rev1.0 (DT)
Call trace:
dump_backtrace+0x0/0x148
show_stack+0x24/0x30
dump_stack+0x98/0xbc
___might_sleep+0x130/0x188
__might_sleep+0x58/0x90
exit_signals+0x44/0x258
do_exit+0xb4/0xa38
die+0x1bc/0x1e0
bug_handler+0x48/0x98
call_break_hook+0x7c/0xa8
brk_handler+0x28/0x68
do_debug_exception+0xc4/0x188
el1_dbg+0x18/0x8c
yaffs_rd_chunk_tags_nand+0xf0/0x110
yaffs_summary_read+0x10c/0x2e0
yaffs2_scan_backwards+0x28c/0xf58
yaffs_guts_initialise+0x71c/0x7a0
yaffs_internal_read_super.isra.20+0x4ec/0x838
yaffs2_internal_read_super_mtd+0x2c/0x48
mount_bdev+0x1a4/0x1e0
yaffs2_mount+0x44/0x58
legacy_get_tree+0x34/0x60
vfs_get_tree+0x34/0x120
do_mount+0x708/0x980
ksys_mount+0x9c/0x110
mount_block_root+0x128/0x29c
mount_root+0x148/0x17c
prepare_namespace+0x178/0x1c0
kernel_init_freeable+0x370/0x390
kernel_init+0x18/0x110
ret_from_fork+0x10/0x1c
note: swapper/0[1] exited with preempt_count 1
Kernel panic - not syncing: Attempted to kill init! exitcode=0x000b
SMP: stopping secondary CPUs
Kernel Offset: disabled
CPU features: 0x0002,20002004
Memory Limit: none
---[ end Kernel panic - not syncing: Attempted to kill init!
exitcode=0x000b ]---
Quanyang Wang (1):
yaffs: add strict check when call yaffs_internal_read_super
fs/yaffs2/yaffs_mtdif.c | 12 ++--
fs/yaffs2/yaffs_vfs.c | 7 ++-
2 files changed, 12 insertions(+), 7 deletions(-)
--
2.17.1
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