On Wed, 26 Apr 2023 at 06:49, Sergey Senozhatsky <senozhatsky@xxxxxxxxxxxx> wrote: > > On (23/04/25 13:06), syzbot wrote: > > 8<--- cut here --- > > Unable to handle kernel NULL pointer dereference at virtual address 000005fc when read > > [000005fc] *pgd=80000080004003, *pmd=00000000 > > Internal error: Oops: 206 [#1] PREEMPT SMP ARM > > Modules linked in: > > CPU: 1 PID: 0 Comm: swapper/1 Not tainted 6.3.0-syzkaller #0 > > Hardware name: ARM-Versatile Express > > > Insufficient stack space to handle exception! > > So much stuff is going on there. > > > Task stack: [0xdf85c000..0xdf85e000] > > IRQ stack: [0xdf804000..0xdf806000] > > Overflow stack: [0x828ae000..0x828af000] > > Internal error: kernel stack overflow: 0 [#2] PREEMPT SMP ARM > > Modules linked in: > > CPU: 1 PID: 0 Comm: swapper/1 Not tainted 6.3.0-syzkaller #0 > > Hardware name: ARM-Versatile Express > > PC is at __dabt_svc+0x14/0x60 arch/arm/kernel/entry-armv.S:210 > > LR is at vsnprintf+0x378/0x408 lib/vsprintf.c:2862 > > pc : [<80200a74>] lr : [<817ad5d8>] psr: 00000193 > > sp : df804028 ip : df805868 fp : df805864 > > r10: 00000060 r9 : ffffffff r8 : 00000010 > > r7 : 00000020 r6 : 00000004 r5 : ffffffff r4 : df805960 > > r3 : ffffffff r2 : 00000040 r1 : ffffffff r0 : 8264d250 > > Flags: nzcv IRQs off FIQs on Mode SVC_32 ISA ARM Segment none > > Control: 30c5387d Table: 80003000 DAC: 00000000 > > Register r0 information: > > 8<--- cut here --- > > Unable to handle kernel NULL pointer dereference at virtual address 000001ff when read > > [000001ff] *pgd=80000080004003, *pmd=00000000 > > Internal error: Oops: 206 [#3] PREEMPT SMP ARM > > Modules linked in: > > CPU: 1 PID: 0 Comm: swapper/1 Not tainted 6.3.0-syzkaller #0 > > Hardware name: ARM-Versatile Express > > PC is at __find_vmap_area mm/vmalloc.c:841 [inline] > > PC is at find_vmap_area mm/vmalloc.c:1862 [inline] > > PC is at find_vm_area mm/vmalloc.c:2571 [inline] > > PC is at vmalloc_dump_obj+0x38/0xb4 mm/vmalloc.c:4108 > > LR is at __raw_spin_lock include/linux/spinlock_api_smp.h:132 [inline] > > LR is at _raw_spin_lock+0x18/0x58 kernel/locking/spinlock.c:154 > > Not sure if I can make sense out of this. +linux-arm-kernel@ I suspect this is some recent arch/arm related corruption. There are also these similar boot crashes that started happening at roughly the same time: https://syzkaller.appspot.com/bug?id=4d697346183db2f86ba2f76acb7d66e7731f88df https://syzkaller.appspot.com/bug?id=dcd98d67539fe4d0d28d2e655e510569eda6f4de
