random: sshd: uninitialized urandom read (32 bytes read) random: sshd: uninitialized urandom read (32 bytes read) random: sshd: uninitialized urandom read (32 bytes read) random: sshd: uninitialized urandom read (32 bytes read) ================================================================== BUG: KASAN: slab-out-of-bounds in predicate_parse kernel/trace/trace_events_filter.c:557 [inline] BUG: KASAN: slab-out-of-bounds in process_preds+0x191f/0x19d0 kernel/trace/trace_events_filter.c:1505 Write of size 4 at addr ffff8801d2142ff0 by task syz-executor906/4510 CPU: 0 PID: 4510 Comm: syz-executor906 Not tainted 4.17.0-rc3+ #1 Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011 Call Trace: __dump_stack lib/dump_stack.c:77 [inline] dump_stack+0x1b9/0x294 lib/dump_stack.c:113 print_address_description+0x6c/0x20b mm/kasan/report.c:256 kasan_report_error mm/kasan/report.c:354 [inline] kasan_report.cold.7+0x242/0x2fe mm/kasan/report.c:412 __asan_report_store4_noabort+0x17/0x20 mm/kasan/report.c:437 predicate_parse kernel/trace/trace_events_filter.c:557 [inline] process_preds+0x191f/0x19d0 kernel/trace/trace_events_filter.c:1505 create_filter+0x155/0x270 kernel/trace/trace_events_filter.c:1713 ftrace_profile_set_filter+0x130/0x2e0 kernel/trace/trace_events_filter.c:2038 perf_event_set_filter+0x248/0x1230 kernel/events/core.c:9079 _perf_ioctl+0x84c/0x15e0 kernel/events/core.c:5059 perf_ioctl+0x59/0x80 kernel/events/core.c:5110 vfs_ioctl fs/ioctl.c:46 [inline] file_ioctl fs/ioctl.c:500 [inline] do_vfs_ioctl+0x1cf/0x16a0 fs/ioctl.c:684 ksys_ioctl+0xa9/0xd0 fs/ioctl.c:701 __do_sys_ioctl fs/ioctl.c:708 [inline] __se_sys_ioctl fs/ioctl.c:706 [inline] __x64_sys_ioctl+0x73/0xb0 fs/ioctl.c:706 do_syscall_64+0x1b1/0x800 arch/x86/entry/common.c:287 entry_SYSCALL_64_after_hwframe+0x49/0xbe RIP: 0033:0x43fdb9 RSP: 002b:00007fff4972e4f8 EFLAGS: 00000213 ORIG_RAX: 0000000000000010 RAX: ffffffffffffffda RBX: 00000000004002c8 RCX: 000000000043fdb9 RDX: 0000000020000200 RSI: 0000000040082406 RDI: 0000000000000003 RBP: 00000000006ca018 R08: 00000000004002c8 R09: 00000000004002c8 R10: 0000000000000000 R11: 0000000000000213 R12: 00000000004016e0 R13: 0000000000401770 R14: 0000000000000000 R15: 0000000000000000 Allocated by task 1: save_stack+0x43/0xd0 mm/kasan/kasan.c:448 set_track mm/kasan/kasan.c:460 [inline] kasan_kmalloc+0xc4/0xe0 mm/kasan/kasan.c:553 kasan_slab_alloc+0x12/0x20 mm/kasan/kasan.c:490 kmem_cache_alloc+0x12e/0x760 mm/slab.c:3554 kmem_cache_zalloc include/linux/slab.h:691 [inline] __kernfs_new_node+0xe7/0x580 fs/kernfs/dir.c:633 kernfs_new_node+0x80/0xf0 fs/kernfs/dir.c:679 __kernfs_create_file+0x4d/0x330 fs/kernfs/file.c:989 sysfs_add_file_mode_ns+0x21a/0x560 fs/sysfs/file.c:305 sysfs_create_file_ns+0x8b/0xb0 fs/sysfs/file.c:332 sysfs_create_file include/linux/sysfs.h:499 [inline] populate_dir lib/kobject.c:56 [inline] create_dir lib/kobject.c:73 [inline] kobject_add_internal+0x4df/0xac0 lib/kobject.c:228 kobject_add_varg lib/kobject.c:363 [inline] kobject_add+0x13a/0x190 lib/kobject.c:407 irq_sysfs_add+0x3e/0x60 kernel/irq/irqdesc.c:291 alloc_descs kernel/irq/irqdesc.c:479 [inline] __irq_alloc_descs+0x24e/0x3d0 kernel/irq/irqdesc.c:740 irq_domain_alloc_descs+0xa7/0x130 kernel/irq/irqdomain.c:983 __irq_domain_alloc_irqs+0x31c/0x830 kernel/irq/irqdomain.c:1302 msi_domain_alloc_irqs+0x292/0xc60 kernel/irq/msi.c:402 native_setup_msi_irqs+0xd9/0x130 arch/x86/kernel/apic/msi.c:81 arch_setup_msi_irqs+0x10/0x20 arch/x86/kernel/x86_init.c:138 pci_msi_setup_msi_irqs+0x99/0xe0 drivers/pci/msi.c:43 msix_capability_init drivers/pci/msi.c:759 [inline] __pci_enable_msix+0x9e9/0x13d0 drivers/pci/msi.c:968 __pci_enable_msix_range drivers/pci/msi.c:1097 [inline] pci_alloc_irq_vectors_affinity+0x176/0x290 drivers/pci/msi.c:1166 vp_request_msix_vectors drivers/virtio/virtio_pci_common.c:135 [inline] vp_find_vqs_msix+0x232/0xcd0 drivers/virtio/virtio_pci_common.c:304 vp_find_vqs+0x57/0x4b0 drivers/virtio/virtio_pci_common.c:400 virtio_find_vqs include/linux/virtio_config.h:191 [inline] virtscsi_init+0x380/0xa10 drivers/scsi/virtio_scsi.c:816 virtscsi_probe+0x41e/0xf04 drivers/scsi/virtio_scsi.c:872 virtio_dev_probe+0x592/0x942 drivers/virtio/virtio.c:245 really_probe drivers/base/dd.c:448 [inline] driver_probe_device+0x69b/0x960 drivers/base/dd.c:590 __driver_attach+0x1b2/0x1f0 drivers/base/dd.c:824 bus_for_each_dev+0x151/0x1d0 drivers/base/bus.c:311 driver_attach+0x3d/0x50 drivers/base/dd.c:843 bus_add_driver+0x4b2/0x600 drivers/base/bus.c:667 driver_register+0x1bf/0x320 drivers/base/driver.c:166 register_virtio_driver+0x79/0xd0 drivers/virtio/virtio.c:296 is_blacklisted_cpu arch/x86/crypto/camellia_glue.c:1473 [inline] init+0xa3/0x114 arch/x86/crypto/camellia_glue.c:1494 do_one_initcall+0x127/0x913 init/main.c:883 do_initcall_level init/main.c:951 [inline] do_initcalls init/main.c:959 [inline] do_basic_setup init/main.c:977 [inline] kernel_init_freeable+0x49b/0x58e init/main.c:1127 kernel_init+0x11/0x1b3 init/main.c:1053 ret_from_fork+0x3a/0x50 arch/x86/entry/entry_64.S:412 Freed by task 0: (stack is not available) The buggy address belongs to the object at ffff8801d2142ee0 which belongs to the cache kernfs_node_cache of size 160 The buggy address is located 112 bytes to the right of 160-byte region [ffff8801d2142ee0, ffff8801d2142f80) The buggy address belongs to the page: page:ffffea0007485080 count:1 mapcount:0 mapping:ffff8801d2142000 index:0xffff8801d2142fee flags: 0x2fffc0000000100(slab) raw: 02fffc0000000100 ffff8801d2142000 ffff8801d2142fee 0000000100000012 raw: ffffea0007485060 ffffea000744e6e0 ffff8801da988640 0000000000000000 page dumped because: kasan: bad access detected Memory state around the buggy address: ffff8801d2142e80: 00 00 00 00 fc fc fc fc fc fc fc fc 00 00 00 00 ffff8801d2142f00: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 >ffff8801d2142f80: fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc ^ ffff8801d2143000: 00 00 00 00 00 00 fc fc fc fc fc fc fc fc fc fc ffff8801d2143080: fb fb fb fb fb fb fb fb fc fc fc fc fc fc fc fc ==================================================================