syzkaller login: [ 86.496048] BUG: Bad rss-counter state mm:000000000a9e58e7 type:MM_FILEPAGES val:33 [ 86.497206] BUG: Bad rss-counter state mm:000000000a9e58e7 type:MM_ANONPAGES val:22 [ 86.658007] ================================================================== [ 86.658908] BUG: KASAN: slab-use-after-free in vma_interval_tree_remove+0xc75/0xec0 [ 86.659856] Read of size 8 at addr ffff88800cb5c4e0 by task sshd/219 [ 86.660621] [ 86.660844] CPU: 0 PID: 219 Comm: sshd Tainted: G L 6.4.0-rc7-next-20230619 #1 [ 86.661983] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS 1.12.0-1 04/01/2014 [ 86.662950] Call Trace: [ 86.663273] <TASK> [ 86.663564] dump_stack_lvl+0x91/0xf0 [ 86.664061] print_report+0xcc/0x620 [ 86.664555] ? __virt_addr_valid+0x102/0x340 [ 86.665108] ? vma_interval_tree_remove+0xc75/0xec0 [ 86.665740] ? vma_interval_tree_remove+0xc75/0xec0 [ 86.666356] kasan_report+0xbe/0xf0 [ 86.666835] ? vma_interval_tree_remove+0xc75/0xec0 [ 86.667469] vma_interval_tree_remove+0xc75/0xec0 [ 86.668071] vma_prepare+0xc54/0x11a0 [ 86.668558] __split_vma+0x5af/0x950 [ 86.669037] ? __pfx___split_vma+0x10/0x10 [ 86.669576] ? find_held_lock+0x2c/0x110 [ 86.670093] do_vmi_align_munmap+0x2ba/0x11f0 [ 86.670653] ? lock_is_held_type+0x9f/0x120 [ 86.671192] ? __pfx_do_vmi_align_munmap+0x10/0x10 [ 86.671797] ? mtree_range_walk+0x632/0x900 [ 86.672348] ? mas_walk+0x5c7/0x7c0 [ 86.672822] do_vmi_munmap+0x1f1/0x2b0 [ 86.673314] mmap_region+0x1f9/0x2660 [ 86.673815] ? vm_mmap_pgoff+0x15c/0x3a0 [ 86.674328] ? __pfx_arch_get_unmapped_area_topdown+0x10/0x10 [ 86.675040] ? __pfx_lock_acquire+0x10/0x10 [ 86.675579] ? __pfx_mmap_region+0x10/0x10 [ 86.676116] ? security_mmap_addr+0x7d/0xa0 [ 86.676650] ? get_unmapped_area+0x1f5/0x3f0 [ 86.677198] do_mmap+0x854/0xf00 [ 86.677647] vm_mmap_pgoff+0x1a6/0x3a0 [ 86.678145] ? __pfx_vm_mmap_pgoff+0x10/0x10 [ 86.678707] ksys_mmap_pgoff+0x3af/0x500 [ 86.679212] do_syscall_64+0x3f/0x90 [ 86.679695] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 86.680336] RIP: 0033:0x7f8d8b2c9d82 [ 86.680791] Code: eb aa 66 0f 1f 44 00 00 41 f7 c1 ff 0f 00 00 75 27 55 48 89 fd 53 89 cb 48 85 ff 74 33 41 89 da 48 89 ef b8 09 00 00 00 0f 05 <48> 3d 00 f0 ff ff 77 56 5b 5d c3 0f 1f 00 c7 05 ae 03 01 00 16 00 [ 86.682898] RSP: 002b:00007ffff020bf38 EFLAGS: 00000206 ORIG_RAX: 0000000000000009 [ 86.683813] RAX: ffffffffffffffda RBX: 0000000000000812 RCX: 00007f8d8b2c9d82 [ 86.684659] RDX: 0000000000000005 RSI: 0000000000001000 RDI: 00007f8d8a703000 [ 86.685525] RBP: 00007f8d8a703000 R08: 0000000000000009 R09: 0000000000001000 [ 86.686382] R10: 0000000000000812 R11: 0000000000000206 R12: 0000563004a61ec0 [ 86.687239] R13: 00007ffff020bf50 R14: 00007ffff020bf80 R15: 00007ffff020c2e0 [ 86.688114] </TASK> [ 86.688410] [ 86.688625] Allocated by task 212: [ 86.689053] kasan_save_stack+0x22/0x50 [ 86.689572] kasan_set_track+0x25/0x30 [ 86.690062] __kasan_slab_alloc+0x59/0x70 [ 86.690589] kmem_cache_alloc+0x16b/0x370 [ 86.691114] vm_area_dup+0x20/0x160 [ 86.691571] __split_vma+0x170/0x950 [ 86.692041] split_vma+0xc6/0x110 [ 86.692482] mprotect_fixup+0x8d2/0xb30 [ 86.692981] do_mprotect_pkey+0x87e/0xd40 [ 86.693497] __x64_sys_mprotect+0x78/0xc0 [ 86.694031] do_syscall_64+0x3f/0x90 [ 86.694513] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 86.695159] [ 86.695377] Freed by task 212: [ 86.695779] kasan_save_stack+0x22/0x50 [ 86.696293] kasan_set_track+0x25/0x30 [ 86.696786] kasan_save_free_info+0x2b/0x50 [ 86.697324] __kasan_slab_free+0x10a/0x190 [ 86.697882] kmem_cache_free+0x10d/0x4d0 [ 86.698395] rcu_core+0x8c8/0x2860 [ 86.698841] __do_softirq+0x1b7/0x7d4 [ 86.699320] [ 86.699536] Last potentially related work creation: [ 86.700118] kasan_save_stack+0x22/0x50 [ 86.700625] __kasan_record_aux_stack+0x8e/0xa0 [ 86.701202] __call_rcu_common.constprop.0+0x6a/0xb90 [ 86.701856] remove_vma+0x139/0x170 [ 86.702317] do_vmi_align_munmap+0xd4a/0x11f0 [ 86.702874] do_vmi_munmap+0x1f1/0x2b0 [ 86.703366] __vm_munmap+0x138/0x3a0 [ 86.703833] __x64_sys_munmap+0x59/0x80 [ 86.704339] do_syscall_64+0x3f/0x90 [ 86.704815] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 86.705456] [ 86.705686] Second to last potentially related work creation: [ 86.706370] kasan_save_stack+0x22/0x50 [ 86.706877] __kasan_record_aux_stack+0x8e/0xa0 [ 86.707454] __call_rcu_common.constprop.0+0x6a/0xb90 [ 86.708096] remove_vma+0x139/0x170 [ 86.708548] do_vmi_align_munmap+0xd4a/0x11f0 [ 86.709103] do_vmi_munmap+0x1f1/0x2b0 [ 86.709618] mmap_region+0x1f9/0x2660 [ 86.710097] do_mmap+0x854/0xf00 [ 86.710534] vm_mmap_pgoff+0x1a6/0x3a0 [ 86.711022] ksys_mmap_pgoff+0x3af/0x500 [ 86.711526] do_syscall_64+0x3f/0x90 [ 86.712005] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 86.712646] [ 86.712859] The buggy address belongs to the object at ffff88800cb5c488 [ 86.712859] which belongs to the cache vm_area_struct of size 168 [ 86.714318] The buggy address is located 88 bytes inside of [ 86.714318] freed 168-byte region [ffff88800cb5c488, ffff88800cb5c530) [ 86.715736] [ 86.715953] The buggy address belongs to the physical page: [ 86.716612] page:00000000ad622e87 refcount:1 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0xcb5c [ 86.717725] memcg:ffff88800c9e9b01 [ 86.718149] anon flags: 0x100000000000200(slab|node=0|zone=1) [ 86.718847] page_type: 0xffffffff() [ 86.719301] raw: 0100000000000200 ffff88800879fc80 ffffea000037cb00 dead000000000003 [ 86.720229] raw: 0000000000000000 0000000000110011 00000001ffffffff ffff88800c9e9b01 [ 86.721133] page dumped because: kasan: bad access detected [ 86.721799] [ 86.722017] Memory state around the buggy address: [ 86.722603] ffff88800cb5c380: fc fc fc fc 00 00 00 00 00 00 00 00 00 00 00 00 [ 86.723454] ffff88800cb5c400: 00 00 00 00 00 00 00 00 00 fc fc fc fc fc fc fc [ 86.724333] >ffff88800cb5c480: fc fa fb fb fb fb fb fb fb fb fb fb fb fb fb fb [ 86.725187] ^ [ 86.725956] ffff88800cb5c500: fb fb fb fb fb fb fc fc fc fc fc fc fc fc 00 00 [ 86.726813] ffff88800cb5c580: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 [ 86.727661] ================================================================== [ 86.728663] Disabling lock debugging due to kernel taint [ 88.769868] BUG: Bad rss-counter state mm:00000000e198a2f7 type:MM_FILEPAGES val:33 [ 88.771090] BUG: Bad rss-counter state mm:00000000e198a2f7 type:MM_ANONPAGES val:22 [ 89.152201] BUG: Bad rss-counter state mm:000000006fb97c53 type:MM_FILEPAGES val:33 [ 89.153241] BUG: Bad rss-counter state mm:000000006fb97c53 type:MM_ANONPAGES val:22 Warning: Permanently added '[localhost]:3600' (ECDSA) to the list of known hosts. 2023/06/19 18:42:00 fuzzer started 2023/06/19 18:42:01 dialing manager at localhost:44161 2023/06/19 18:42:01 checking machine... 2023/06/19 18:42:01 checking revisions... [ 89.899876] kmemleak: Automatic memory scanning thread ended 2023/06/19 18:42:01 testing simple program... [ 89.950356] cgroup: Unknown subsys name 'net' [ 90.001064] cgroup: Unknown subsys name 'rlimit' executing program executing program executing program VM DIAGNOSIS: 18:41:12 Registers: info registers vcpu 0 RAX=ffff88806ce35000 RBX=0000000000000000 RCX=ffffffff8450c50e RDX=ffffed100d9c6a01 RSI=0000000000000004 RDI=ffffffff812889a5 RBP=dffffc0000000000 RSP=ffffffff85407e10 R8 =0000000000000000 R9 =ffffed100d9c6a00 R10=ffff88806ce35003 R11=ffff888008c58000 R12=ffffffff85d3bed0 R13=1ffffffff0a80fc7 R14=0000000000000000 R15=0000000000000000 RIP=ffffffff8450d49f RFL=00000246 [---Z-P-] CPL=0 II=0 A20=1 SMM=0 HLT=1 ES =0000 0000000000000000 00000000 00000000 CS =0010 0000000000000000 ffffffff 00a09b00 DPL=0 CS64 [-RA] SS =0018 0000000000000000 ffffffff 00c09300 DPL=0 DS [-WA] DS =0000 0000000000000000 00000000 00000000 FS =0000 0000000000000000 00000000 00000000 GS =0000 ffff88806ce00000 00000000 00000000 LDT=0000 fffffe0000000000 00000000 00000000 TR =0040 fffffe0000003000 00004087 00008b00 DPL=0 TSS64-busy GDT= fffffe0000001000 0000007f IDT= fffffe0000000000 00000fff CR0=80050033 CR2=00007f6503e2a160 CR3=000000000c922000 CR4=00350ef0 DR0=0000000000000000 DR1=0000000000000000 DR2=0000000000000000 DR3=0000000000000000 DR6=00000000ffff0ff0 DR7=0000000000000400 EFER=0000000000000d01 FCW=037f FSW=0000 [ST=0] FTW=00 MXCSR=00001f80 FPR0=0000000000000000 0000 FPR1=0000000000000000 0000 FPR2=0000000000000000 0000 FPR3=0000000000000000 0000 FPR4=0000000000000000 0000 FPR5=0000000000000000 0000 FPR6=0000000000000000 0000 FPR7=0000000000000000 0000 XMM00=2030303a32343a3831203931206e754a XMM01=657463656e6e6f63736944203a5d3832 XMM02=302e303120746f6f722072657375206d XMM03=203a5d3832325b646873732072656c6c XMM04=69662068637573206f4e203a656c6163 XMM05=3a656c696620766e65206e65706f206f XMM06=65733a6468737328766e655f6d617020 XMM07=6b7a79732030303a32343a3831203931 XMM08=3d656e696c646d632022656369767265 XMM09=00000000000000000000000000000000 XMM10=00000000000000000000000000000000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000 info registers vcpu 1 RAX=0000000000000000 RBX=0000000000000044 RCX=ffffffff83726394 RDX=ffff8880158b0000 RSI=0000000000000000 RDI=0000000000000000 RBP=0000000000000045 RSP=ffff88800ea177b8 R8 =0000000000000005 R9 =000000000000006b R10=0000000000000006 R11=00000000000b6996 R12=000000000000000a R13=ffffffff87f96d00 R14=0000000000000000 R15=0000000000000006 RIP=ffffffff814c0388 RFL=00000246 [---Z-P-] CPL=0 II=0 A20=1 SMM=0 HLT=0 ES =0000 0000000000000000 00000000 00000000 CS =0010 0000000000000000 ffffffff 00a09b00 DPL=0 CS64 [-RA] SS =0018 0000000000000000 ffffffff 00c09300 DPL=0 DS [-WA] DS =0000 0000000000000000 00000000 00000000 FS =0000 00007f90276f3900 00000000 00000000 GS =0000 ffff88806cf00000 00000000 00000000 LDT=0000 fffffe0000000000 00000000 00000000 TR =0040 fffffe000004a000 00004087 00008b00 DPL=0 TSS64-busy GDT= fffffe0000048000 0000007f IDT= fffffe0000000000 00000fff CR0=80050033 CR2=00007f9027caa618 CR3=000000000fd68000 CR4=00350ee0 DR0=0000000000000000 DR1=0000000000000000 DR2=0000000000000000 DR3=0000000000000000 DR6=00000000ffff0ff0 DR7=0000000000000400 EFER=0000000000000d01 FCW=037f FSW=0000 [ST=0] FTW=00 MXCSR=00001f80 FPR0=0000000000000000 0000 FPR1=0000000000000000 0000 FPR2=0000000000000000 0000 FPR3=0000000000000000 0000 FPR4=0000000000000000 0000 FPR5=0000000000000000 0000 FPR6=0000000000000000 0000 FPR7=0000000000000000 0000 XMM00=00000000000000000000000000000000 XMM01=6e69676f6c5f6d61702c78756e696c65 XMM02=755f6d61702c74696d7265705f6d6170 XMM03=2c766e655f6d61702c7374696d696c5f XMM04=6d61702c766e655f6d61702c7374696d XMM05=78696e755f6d61702c74696d7265705f XMM06=6469756e69676f6c5f6d61702c78756e XMM07=672065736f6c635f6e6f69737365733a XMM08=61662029286e65706f5f746964756100 XMM09=00000000000000000000000000000000 XMM10=00000000000000000000000000000000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000