Hi,
Since commit:
54c7a8916a887f35 ("initramfs: free initrd memory if opening /initrd.image
fails")
IIUC prior to that commit, we'd only attempt to free an intird if we had
one, whereas now we do so unconditionally. AFAICT, in this case
initrd_start has not been initialized (I'm not using an initrd or
initramfs on my system), so we end up trying virt_to_phys() on a bogus
VA in free_initrd_mem().
Any ideas on the right way to fix this?
Thanks,
Mark.
[ 5.251023][ T1] ------------[ cut here ]------------
[ 5.252465][ T1] virt_to_phys used for non-linear address:
(____ptrval____) (0x0)
[ 5.254388][ T1] WARNING: CPU: 0 PID: 1 at arch/arm64/mm/physaddr.c:15
__virt_to_phys+0x88/0xb8
[ 5.256473][ T1] CPU: 0 PID: 1 Comm: swapper/0 Not tainted
5.1.0-11058-g83f3ef3 #4
[ 5.258513][ T1] Hardware name: linux,dummy-virt (DT)
[ 5.259923][ T1] pstate: 80400005 (Nzcv daif +PAN -UAO)
[ 5.261375][ T1] pc : __virt_to_phys+0x88/0xb8
[ 5.262623][ T1] lr : __virt_to_phys+0x88/0xb8
[ 5.263879][ T1] sp : ffff80000be4fc60
[ 5.264941][ T1] x29: ffff80000be4fc60 x28: 0000000040000000
[ 5.266522][ T1] x27: ffff200015445000 x26: 0000000000000000
[ 5.268112][ T1] x25: 0000000000000000 x24: ffff2000163e0000
[ 5.269691][ T1] x23: ffff2000163e0440 x22: ffff2000163e0000
[ 5.271270][ T1] x21: ffff2000163e0400 x20: 0000000000000000
[ 5.272860][ T1] x19: 0000000000000000 x18: ffff200016aa0f80
[ 5.274430][ T1] x17: ffff2000153a0000 x16: 00000000f2000000
[ 5.276018][ T1] x15: 1fffe40002d5560d x14: 1ffff00007716109
[ 5.277596][ T1] x13: ffff200016e17000 x12: ffff040002a83fd9
[ 5.279179][ T1] x11: 1fffe40002a83fd8 x10: ffff040002a83fd8
[ 5.280765][ T1] x9 : 1fffe40002a83fd8 x8 : dfff200000000000
[ 5.282343][ T1] x7 : ffff040002a83fd9 x6 : ffff20001541fec0
[ 5.283929][ T1] x5 : ffff80003b8b0040 x4 : 0000000000000000
[ 5.285509][ T1] x3 : ffff2000102c6504 x2 : ffff1000017c9f54
[ 5.287091][ T1] x1 : 15eab2dadba38000 x0 : 0000000000000000
[ 5.288678][ T1] Call trace:
[ 5.289532][ T1] __virt_to_phys+0x88/0xb8
[ 5.290701][ T1] free_initrd_mem+0x3c/0x50
[ 5.291894][ T1] populate_rootfs+0x2f4/0x358
[ 5.293123][ T1] do_one_initcall+0x568/0xb94
[ 5.294349][ T1] kernel_init_freeable+0xd44/0xe2c
[ 5.295695][ T1] kernel_init+0x14/0x1c0
[ 5.296814][ T1] ret_from_fork+0x10/0x1c
[ 5.297947][ T1] irq event stamp: 288672
[ 5.299069][ T1] hardirqs last enabled at (288671): [<ffff2000102c4cac>]
console_unlock+0x89c/0xe50
[ 5.301521][ T1] hardirqs last disabled at (288672): [<ffff2000100823e0>]
do_debug_exception+0x268/0x3e0
[ 5.304061][ T1] softirqs last enabled at (288668): [<ffff2000100835e0>]
__do_softirq+0xa38/0xf48
[ 5.306457][ T1] softirqs last disabled at (288653): [<ffff2000101ac994>]
irq_exit+0x2a4/0x318
[ 5.308777][ T1] ---[ end trace 3cf83e3c184a4d3e ]---
