From: Quanyang Wang <quanyang.w...@windriver.com> 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 aaaa #0: DisplayPort monitor Waiting 5 sec before mounting root device... mmcblk0: mmc0:aaaa 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: 80000005 (Nzcv daif -PAN -UAO) pc : yaffs_rd_chunk_tags_nand+0xf0/0x110 lr : yaffs_rd_chunk_tags_nand+0x108/0x110 sp : ffffff801003b770 x29: ffffff801003b770 x28: ffffffc876fe8000 x27: 00000000000c0000 x26: 0000000000000000 x25: 00000000ffffffe1 x24: 0000000000010000 x23: 0000000000000000 x22: ffffff8011228000 x21: 000000000000005f x20: ffffff801003b890 x19: ffffffc876fe8000 x18: ffffffffffffffff x17: 0000000000000000 x16: 0000000000000000 x15: ffffff80112285c8 x14: ffffff801137d228 x13: ffffff801137ce74 x12: ffffff8011246000 x11: 0000000000000000 x10: ffffff801137c000 x9 : 0000000000000000 x8 : 0000000000000007 x7 : 000000000000015c x6 : ffffff801137c490 x5 : 0000000000000000 x4 : 0000000000000000 x3 : 00000000ffffffff x2 : 50c80792e0663400 x1 : 0000000000000000 x0 : 0000000000000037 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 (d4210000) ---[ 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: [<ffffff80100a4598>] 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=0x0000000b SMP: stopping secondary CPUs Kernel Offset: disabled CPU features: 0x0002,20002004 Memory Limit: none ---[ end Kernel panic - not syncing: Attempted to kill init! exitcode=0x0000000b ]--- 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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