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Kernel | Title | Repro | Cause bisect | Fix bisect | Count | Last | Reported | Patched | Status |
---|---|---|---|---|---|---|---|---|---|
linux-4.19 | KASAN: use-after-free Read in kvm_vm_ioctl_unregister_coalesced_mmio | C | error | 14 | 153d | 866d | 0/1 | upstream: reported C repro on 2020/11/05 19:13 | |
linux-4.14 | KASAN: use-after-free Read in kvm_vm_ioctl_unregister_coalesced_mmio | C | error | 21 | 66d | 878d | 0/1 | upstream: reported C repro on 2020/10/24 16:43 |
RBP: 00007fff0459d490 R08: 0000000000000001 R09: 0000000000400031 R10: 0000000000000000 R11: 0000000000000246 R12: 0000000000000005 R13: 0000000000000000 R14: 00000000004ad018 R15: 0000000000400488 kvm: failed to shrink bus, removing it completely ================================================================== BUG: KASAN: use-after-free in kvm_vm_ioctl_unregister_coalesced_mmio+0xe6/0x3a0 arch/x86/kvm/../../../virt/kvm/coalesced_mmio.c:187 Read of size 8 at addr ffff8881ea59ea00 by task syz-executor474/337 CPU: 1 PID: 337 Comm: syz-executor474 Not tainted 5.4.96-syzkaller-00126-g72d1876a39cf #0 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+0x1d8/0x24e lib/dump_stack.c:118 print_address_description+0x9b/0x650 mm/kasan/report.c:374 __kasan_report+0x182/0x1f0 mm/kasan/report.c:506 kasan_report+0x30/0x60 mm/kasan/common.c:634 kvm_vm_ioctl_unregister_coalesced_mmio+0xe6/0x3a0 arch/x86/kvm/../../../virt/kvm/coalesced_mmio.c:187 kvm_vm_ioctl+0x947/0x1a40 arch/x86/kvm/../../../virt/kvm/kvm_main.c:3419 do_vfs_ioctl+0x76a/0x1720 fs/ioctl.c:47 ksys_ioctl fs/ioctl.c:742 [inline] __do_sys_ioctl fs/ioctl.c:749 [inline] __se_sys_ioctl fs/ioctl.c:747 [inline] __x64_sys_ioctl+0xd4/0x110 fs/ioctl.c:747 do_syscall_64+0xcb/0x150 arch/x86/entry/common.c:290 entry_SYSCALL_64_after_hwframe+0x44/0xa9 Code: 28 c3 e8 2a 14 00 00 66 2e 0f 1f 84 00 00 00 00 00 48 89 f8 48 89 f7 48 89 d6 48 89 ca 4d 89 c2 4d 89 c8 4c 8b 4c 24 08 0f 05 <48> 3d 01 f0 ff ff 73 01 c3 48 c7 c1 c0 ff ff ff f7 d8 64 89 01 48 RSP: 002b:00007fff0459d488 EFLAGS: 00000246 ORIG_RAX: 0000000000000010 RAX: ffffffffffffffda RBX: 0000000000000001 RCX: 000000000043f5a9 RDX: 00000000200000c0 RSI: 000000004010ae68 RDI: 0000000000000004 RBP: 00007fff0459d490 R08: 0000000000000001 R09: 0000000000400031 R10: 0000000000000000 R11: 0000000000000246 R12: 0000000000000005 R13: 0000000000000000 R14: 00000000004ad018 R15: 0000000000400488 Allocated by task 337: save_stack mm/kasan/common.c:69 [inline] set_track mm/kasan/common.c:77 [inline] __kasan_kmalloc+0x137/0x1e0 mm/kasan/common.c:510 kmalloc include/linux/slab.h:556 [inline] kzalloc include/linux/slab.h:690 [inline] kvm_vm_ioctl_register_coalesced_mmio+0x86/0x310 arch/x86/kvm/../../../virt/kvm/coalesced_mmio.c:150 kvm_vm_ioctl+0x7f2/0x1a40 arch/x86/kvm/../../../virt/kvm/kvm_main.c:3410 do_vfs_ioctl+0x76a/0x1720 fs/ioctl.c:47 ksys_ioctl fs/ioctl.c:742 [inline] __do_sys_ioctl fs/ioctl.c:749 [inline] __se_sys_ioctl fs/ioctl.c:747 [inline] __x64_sys_ioctl+0xd4/0x110 fs/ioctl.c:747 do_syscall_64+0xcb/0x150 arch/x86/entry/common.c:290 entry_SYSCALL_64_after_hwframe+0x44/0xa9 Freed by task 337: save_stack mm/kasan/common.c:69 [inline] set_track mm/kasan/common.c:77 [inline] kasan_set_free_info mm/kasan/common.c:332 [inline] __kasan_slab_free+0x18a/0x240 mm/kasan/common.c:471 slab_free mm/slub.c:3051 [inline] kfree+0xe0/0x660 mm/slub.c:4017 kvm_iodevice_destructor include/kvm/iodev.h:61 [inline] kvm_io_bus_unregister_dev+0x377/0x470 arch/x86/kvm/../../../virt/kvm/kvm_main.c:4041 kvm_vm_ioctl+0x947/0x1a40 arch/x86/kvm/../../../virt/kvm/kvm_main.c:3419 do_vfs_ioctl+0x76a/0x1720 fs/ioctl.c:47 do_syscall_64+0xcb/0x150 arch/x86/entry/common.c:290 entry_SYSCALL_64_after_hwframe+0x44/0xa9 The buggy address belongs to the object at ffff8881ea59ea00 which belongs to the cache kmalloc-64 of size 64 The buggy address is located 0 bytes inside of 64-byte region [ffff8881ea59ea00, ffff8881ea59ea40) The buggy address belongs to the page: page:ffffea0007a96780 refcount:1 mapcount:0 mapping:ffff8881f5c03180 index:0x0 flags: 0x8000000000000200(slab) raw: 8000000000000200 dead000000000100 dead000000000122 ffff8881f5c03180 raw: 0000000000000000 0000000080200020 00000001ffffffff 0000000000000000 page dumped because: kasan: bad access detected Memory state around the buggy address: ffff8881ea59e900: fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc ffff8881ea59e980: fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc >ffff8881ea59ea00: fb fb fb fb fb fb fb fb fc fc fc fc fc fc fc fc ^ ffff8881ea59ea80: fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc ffff8881ea59eb00: fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc ================================================================== CPU: 1 PID: 337 Comm: syz-executor474 Tainted: G B 5.4.96-syzkaller-00126-g72d1876a39cf #0 Call Trace: __dump_stack lib/dump_stack.c:77 [inline] dump_stack+0x1d8/0x24e lib/dump_stack.c:118 panic+0x285/0x740 kernel/panic.c:221 end_report mm/kasan/report.c:96 [inline] __kasan_report+0x1ec/0x1f0 mm/kasan/report.c:513 kasan_report+0x30/0x60 mm/kasan/common.c:634 kvm_vm_ioctl_unregister_coalesced_mmio+0xe6/0x3a0 arch/x86/kvm/../../../virt/kvm/coalesced_mmio.c:187 kvm_vm_ioctl+0x947/0x1a40 arch/x86/kvm/../../../virt/kvm/kvm_main.c:3419 do_vfs_ioctl+0x76a/0x1720 fs/ioctl.c:47 ksys_ioctl fs/ioctl.c:742 [inline] __do_sys_ioctl fs/ioctl.c:749 [inline] __se_sys_ioctl fs/ioctl.c:747 [inline] __x64_sys_ioctl+0xd4/0x110 fs/ioctl.c:747 do_syscall_64+0xcb/0x150 arch/x86/entry/common.c:290 entry_SYSCALL_64_after_hwframe+0x44/0xa9 RIP: 0033:0x43f5a9 Code: 28 c3 e8 2a 14 00 00 66 2e 0f 1f 84 00 00 00 00 00 48 89 f8 48 89 f7 48 89 d6 48 89 ca 4d 89 c2 4d 89 c8 4c 8b 4c 24 08 0f 05 <48> 3d 01 f0 ff ff 73 01 c3 48 c7 c1 c0 ff ff ff f7 d8 64 89 01 48 RSP: 002b:00007fff0459d488 EFLAGS: 00000246 ORIG_RAX: 0000000000000010 RAX: ffffffffffffffda RBX: 0000000000000001 RCX: 000000000043f5a9 RDX: 00000000200000c0 RSI: 000000004010ae68 RDI: 0000000000000004 RBP: 00007fff0459d490 R08: 0000000000000001 R09: 0000000000400031 R10: 0000000000000000 R11: 0000000000000246 R12: 0000000000000005 R13: 0000000000000000 R14: 00000000004ad018 R15: 0000000000400488 Kernel Offset: disabled Rebooting in 86400 seconds..
Manager | Time | Kernel | Commit | Syzkaller | Config | Log | Report | Syz repro | C repro | VM info | Assets | Title |
---|---|---|---|---|---|---|---|---|---|---|---|---|
ci2-android-5-4-kasan | 2021/02/10 13:54 | android12-5.4 | 72d1876a39cf | 9c8b8541 | .config | console log | report | syz | C | KASAN: use-after-free Read in kvm_vm_ioctl_unregister_coalesced_mmio | ||
ci2-android-5-4-kasan | 2021/04/13 08:29 | android12-5.4 | 3c5dbcf40ba8 | 6a81331a | .config | console log | report | info | KASAN: use-after-free Read in kvm_vm_ioctl_unregister_coalesced_mmio | |||
ci2-android-5-4-kasan | 2021/04/12 00:56 | android12-5.4 | 94535fb224d4 | 6a81331a | .config | console log | report | info | KASAN: use-after-free Read in kvm_vm_ioctl_unregister_coalesced_mmio | |||
ci2-android-5-4-kasan | 2021/03/19 13:58 | android12-5.4 | 63fc7efda14e | 2af9d324 | .config | console log | report | info | KASAN: use-after-free Read in kvm_vm_ioctl_unregister_coalesced_mmio | |||
ci2-android-5-4-kasan | 2021/03/02 07:37 | android12-5.4 | 000f1f482d2c | 183afb6c | .config | console log | report | info | KASAN: use-after-free Read in kvm_vm_ioctl_unregister_coalesced_mmio | |||
ci2-android-5-4-kasan | 2021/02/10 13:43 | android12-5.4 | 72d1876a39cf | 9c8b8541 | .config | console log | report | info | KASAN: use-after-free Read in kvm_vm_ioctl_unregister_coalesced_mmio |