random: sshd: uninitialized urandom read (32 bytes read, 116 bits of entropy available) random: sshd: uninitialized urandom read (32 bytes read, 119 bits of entropy available) random: sshd: uninitialized urandom read (32 bytes read, 125 bits of entropy available) kasan: CONFIG_KASAN_INLINE enabled kasan: GPF could be caused by NULL-ptr deref or user memory accessgeneral protection fault: 0000 [#1] PREEMPT SMP KASAN Dumping ftrace buffer: (ftrace buffer empty) Modules linked in: CPU: 1 PID: 3698 Comm: syzkaller418695 Not tainted 4.4.125-g38f41ec #63 kasan: CONFIG_KASAN_INLINE enabled kasan: GPF could be caused by NULL-ptr deref or user memory access Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011 task: ffff8801cbb5c800 task.stack: ffff8801d4dc8000 RIP: 0010:[] [] __read_once_size include/linux/compiler.h:218 [inline] RIP: 0010:[] [] atomic_read arch/x86/include/asm/atomic.h:27 [inline] RIP: 0010:[] [] put_page_testzero include/linux/mm.h:357 [inline] RIP: 0010:[] [] __free_pages+0x21/0x90 mm/page_alloc.c:3365 RSP: 0018:ffff8801d4dcf9e8 EFLAGS: 00010a07 RAX: dffffc0000000000 RBX: dead4ead00000000 RCX: ffffffff825bb1fb RDX: 1bd5a9d5a0000003 RSI: 0000000000000006 RDI: dead4ead0000001c RBP: ffff8801d4dcf9f8 R08: 0000000048000000 R09: 0000000000001e30 R10: 0000000000002100 R11: 1ffff1003a9b9f1a R12: 0000000000000004 R13: 0000000000000020 R14: ffff8801ca484200 R15: dffffc0000000000 FS: 00007f894431d700(0000) GS:ffff8801db300000(0000) knlGS:0000000000000000 CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033 CR2: 0000000020e94000 CR3: 00000001cd9b2000 CR4: 0000000000160670 DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000 DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400 Stack: 0000000000000246 ffff8801ca484358 ffff8801d4dcfa58 ffffffff825bb221 ffff8801ca484370 ffffed003949086b ffffed003949086e ffff8801ca484368 dead4ead00000000 ffff8801ca484340 0000000000000000 0000000000000000 Call Trace: [] sg_remove_scat.isra.17+0x1c1/0x2d0 drivers/scsi/sg.c:1956 [] sg_finish_rem_req+0x2a6/0x320 drivers/scsi/sg.c:1839 [] sg_new_read+0x18b/0x420 drivers/scsi/sg.c:578 [] sg_read+0x8cf/0x14d0 drivers/scsi/sg.c:466 [] do_loop_readv_writev+0x141/0x1e0 fs/read_write.c:680 [] do_readv_writev+0x5dd/0x6e0 fs/read_write.c:810 [] vfs_readv+0x78/0xb0 fs/read_write.c:834 [] SYSC_readv fs/read_write.c:860 [inline] [] SyS_readv+0xd9/0x240 fs/read_write.c:852 [] entry_SYSCALL_64_fastpath+0x22/0x9e Code: c6 a0 0c 00 e9 78 fd ff ff 90 48 b8 00 00 00 00 00 fc ff df 55 48 89 e5 53 48 89 fb 48 83 c7 1c 48 89 fa 48 83 ec 08 48 c1 ea 03 <0f> b6 14 02 48 89 f8 83 e0 07 83 c0 03 38 d0 7c 04 84 d2 75 49 RIP [] __read_once_size include/linux/compiler.h:218 [inline] RIP [] atomic_read arch/x86/include/asm/atomic.h:27 [inline] RIP [] put_page_testzero include/linux/mm.h:357 [inline] RIP [] __free_pages+0x21/0x90 mm/page_alloc.c:3365 RSP general protection fault: 0000 [#2] [ 27.376550] ---[ end trace a4e74a4924bf2818 ]--- Kernel panic - not syncing: Fatal exception PREEMPT SMP KASAN Dumping ftrace buffer: (ftrace buffer empty) Modules linked in: CPU: 0 PID: 3699 Comm: syzkaller418695 Tainted: G D 4.4.125-g38f41ec #63 Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011 task: ffff8800afcc4800 task.stack: ffff8800af268000 RIP: 0010:[] [] __read_once_size include/linux/compiler.h:218 [inline] RIP: 0010:[] [] atomic_read arch/x86/include/asm/atomic.h:27 [inline] RIP: 0010:[] [] put_page_testzero include/linux/mm.h:357 [inline] RIP: 0010:[] [] __free_pages+0x21/0x90 mm/page_alloc.c:3365 RSP: 0018:ffff8800af26f9e8 EFLAGS: 00010a07 RAX: dffffc0000000000 RBX: dead4ead00000000 RCX: ffffffff825bb1fb RDX: 1bd5a9d5a0000003 RSI: 0000000000000006 RDI: dead4ead0000001c RBP: ffff8800af26f9f8 R08: 0000000048000000 R09: 0000000000001e30 R10: 0000000000002100 R11: 1ffff10015e4df1a R12: 0000000000000004 R13: 0000000000000020 R14: ffff8801ca874200 R15: dffffc0000000000 FS: 00007f89442fc700(0000) GS:ffff8801db200000(0000) knlGS:0000000000000000 CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033 CR2: 00007f89442fbe78 CR3: 00000001cd9b2000 CR4: 0000000000160670 DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000 DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400 Stack: 0000000000000246 ffff8801ca874358 ffff8800af26fa58 ffffffff825bb221 ffff8801ca874370 ffffed003950e86b ffffed003950e86e ffff8801ca874368 dead4ead00000000 ffff8801ca874340 0000000000000000 0000000000000000 Call Trace: [] sg_remove_scat.isra.17+0x1c1/0x2d0 drivers/scsi/sg.c:1956 [] sg_finish_rem_req+0x2a6/0x320 drivers/scsi/sg.c:1839 [] sg_new_read+0x18b/0x420 drivers/scsi/sg.c:578 [] sg_read+0x8cf/0x14d0 drivers/scsi/sg.c:466 [] do_loop_readv_writev+0x141/0x1e0 fs/read_write.c:680 [] do_readv_writev+0x5dd/0x6e0 fs/read_write.c:810 [] vfs_readv+0x78/0xb0 fs/read_write.c:834 [] SYSC_readv fs/read_write.c:860 [inline] [] SyS_readv+0xd9/0x240 fs/read_write.c:852 [] entry_SYSCALL_64_fastpath+0x22/0x9e Code: c6 a0 0c 00 e9 78 fd ff ff 90 48 b8 00 00 00 00 00 fc ff df 55 48 89 e5 53 48 89 fb 48 83 c7 1c 48 89 fa 48 83 ec 08 48 c1 ea 03 <0f> b6 14 02 48 89 f8 83 e0 07 83 c0 03 38 d0 7c 04 84 d2 75 49 RIP [] __read_once_size include/linux/compiler.h:218 [inline] RIP [] atomic_read arch/x86/include/asm/atomic.h:27 [inline] RIP [] put_page_testzero include/linux/mm.h:357 [inline] RIP [] __free_pages+0x21/0x90 mm/page_alloc.c:3365 RSP Dumping ftrace buffer: (ftrace buffer empty) Kernel Offset: disabled Rebooting in 86400 seconds..