Dear Fabio Estevam, > From: Fabio Estevam <[email protected]> > > When selecting CONFIG_MTD_NAND_VERIFY_WRITE=y and doing simple write tests > the following kernel crash happens: > > root@freescale /$ dd if=/dev/zero of=/dev/mtd0 bs=128k count=1 > [ 41.070000] Unable to handle kernel NULL pointer dereference at virtual > addr0 [ 41.080000] pgd = c77ac000 > [ 41.080000] [00000000] *pgd=4773c831, *pte=00000000, *ppte=00000000 > [ 41.090000] Internal error: Oops: 17 [#1] ARM > [ 41.090000] Modules linked in: > [ 41.090000] CPU: 0 Not tainted > (3.6.0-rc1-next-20120809-00002-ga25d017-d) [ 41.090000] PC is at > nand_verify_buf+0x18/0x5c > [ 41.090000] LR is at nand_write_page+0xc0/0x140 > [ 41.090000] pc : [<c023e7d4>] lr : [<c023fcfc>] psr: 20000013 > [ 41.090000] sp : c7779de4 ip : 00000000 fp : c6e60000 > [ 41.090000] r10: 00000000 r9 : 00020000 r8 : 00000000 > [ 41.090000] r7 : 00000000 r6 : c6e60000 r5 : c762cb10 r4 : 00000000 > [ 41.090000] r3 : c762c8a8 r2 : 00000800 r1 : c6e60000 r0 : 00000000 > [ 41.090000] Flags: nzCv IRQs on FIQs on Mode SVC_32 ISA ARM Segment > user [ 41.090000] Control: 0005317f Table: 477ac000 DAC: 00000015 > [ 41.090000] Process dd (pid: 427, stack limit = 0xc7778270) > [ 41.090000] Stack: (0xc7779de4 to 0xc777a000) > ... > > The NULL pointer dereference that happens in nand_verify_buf() is due to > the missing gpmi_verify_buf implementation in the gpmi-nand driver. > > Implement gpmi_verify_buf() to prevent this crash. [...]
Acked-by: Marek Vasut <[email protected]> Definitelly should go for stable too. Best regards, Marek Vasut -- To unsubscribe from this list: send the line "unsubscribe stable" in the body of a message to [email protected] More majordomo info at http://vger.kernel.org/majordomo-info.html
