Hi Santosh Does your destination buffer have sufficient size to hold the data ? Regards Sudip On Fri, Jul 19, 2013 at 7:48 PM, Sateesh Kumar <sateesh.kumar@xxxxxxxxxxxxxxxxxx> wrote: > Dear Experts, > > I am using the kernel 3.6.10 for my driver development. When I compiled > the code I am getting the following warning. I am facing the same issue > with 3.5.4 kernel. > > "call to ‘copy_from_user_overflow’ declared with attribute warning: > copy_from_user() buffer size is not provably correct" > > When I try to install the module, I am facing the kernel crash. Here is > the crash log. > > > //Kernel crash log - Start > > Call Trace: > [19592.491229] [<c044bbf2>] warn_slowpath_common+0x72/0xa0 > [19592.491233] [<c06882b7>] ? copy_from_user_overflow+0x27/0x30 > [19592.491236] [<c06882b7>] ? copy_from_user_overflow+0x27/0x30 > [19592.491241] [<f86f54c0>] ? jtag_usb_card_read+0x70/0x70 [usb_jtag] > [19592.491244] [<c044bcc3>] warn_slowpath_fmt+0x33/0x40 > [19592.491247] [<c06882b7>] copy_from_user_overflow+0x27/0x30 > [19592.491251] [<f86f54ec>] jtag_usb_ioctl+0x2c/0x80 [usb_jtag] > [19592.491256] [<c0565dea>] do_vfs_ioctl+0x7a/0x590 > [19592.491259] [<c055f41b>] ? putname+0x2b/0x40 > [19592.491262] [<c055f41b>] ? putname+0x2b/0x40 > [19592.491265] [<c0555238>] ? do_sys_open+0x158/0x1c0 > [19592.491269] [<c0566368>] sys_ioctl+0x68/0x80 > [19592.491274] [<c0980cdf>] sysenter_do_call+0x12/0x28 > [19592.491276] ---[ end trace 98bdb358664246ac ]--- > [19592.491277] copy_from_usr error > > //Kernel crash log - End > > > > Please let me know, what wrong with my driver? > > > Thanks in advance, > Regards, > Sateesh > > > _______________________________________________ > Kernelnewbies mailing list > Kernelnewbies@xxxxxxxxxxxxxxxxx > http://lists.kernelnewbies.org/mailman/listinfo/kernelnewbies _______________________________________________ Kernelnewbies mailing list Kernelnewbies@xxxxxxxxxxxxxxxxx http://lists.kernelnewbies.org/mailman/listinfo/kernelnewbies
