syzkaller login: [ 33.520706] BUG: Bad rss-counter state mm:00000000419708b3 type:MM_FILEPAGES val:33 [ 33.521877] BUG: Bad rss-counter state mm:00000000419708b3 type:MM_ANONPAGES val:22 [ 33.699907] ================================================================== [ 33.701023] BUG: KASAN: slab-use-after-free in vma_interval_tree_remove+0xc75/0xec0 [ 33.702160] Read of size 8 at addr ffff88800e28f5c8 by task sshd/221 [ 33.703108] [ 33.703328] CPU: 0 PID: 221 Comm: sshd Not tainted 6.4.0-rc7-next-20230619 #1 [ 33.704190] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS 1.12.0-1 04/01/2014 [ 33.705169] Call Trace: [ 33.705488] [ 33.705772] dump_stack_lvl+0x91/0xf0 [ 33.706266] print_report+0xcc/0x620 [ 33.706766] ? __virt_addr_valid+0x102/0x340 [ 33.707323] ? vma_interval_tree_remove+0xc75/0xec0 [ 33.707941] ? vma_interval_tree_remove+0xc75/0xec0 [ 33.708556] kasan_report+0xbe/0xf0 [ 33.709030] ? vma_interval_tree_remove+0xc75/0xec0 [ 33.709652] vma_interval_tree_remove+0xc75/0xec0 [ 33.710244] vma_prepare+0xc54/0x11a0 [ 33.710736] __split_vma+0x5af/0x950 [ 33.711208] ? __pfx___split_vma+0x10/0x10 [ 33.711737] ? find_held_lock+0x2c/0x110 [ 33.712258] do_vmi_align_munmap+0x2ba/0x11f0 [ 33.712828] ? lock_is_held_type+0x9f/0x120 [ 33.713365] ? __pfx_do_vmi_align_munmap+0x10/0x10 [ 33.713968] ? mtree_range_walk+0x632/0x900 [ 33.714542] ? mas_walk+0x5c7/0x7c0 [ 33.715017] do_vmi_munmap+0x1f1/0x2b0 [ 33.715534] mmap_region+0x1f9/0x2660 [ 33.716024] ? vm_mmap_pgoff+0x15c/0x3a0 [ 33.716536] ? __pfx_arch_get_unmapped_area_topdown+0x10/0x10 [ 33.717259] ? __pfx_lock_acquire+0x10/0x10 [ 33.717812] ? __pfx_mmap_region+0x10/0x10 [ 33.718352] ? security_mmap_addr+0x7d/0xa0 [ 33.718899] ? get_unmapped_area+0x1f5/0x3f0 [ 33.719444] do_mmap+0x854/0xf00 [ 33.719891] vm_mmap_pgoff+0x1a6/0x3a0 [ 33.720397] ? __pfx_vm_mmap_pgoff+0x10/0x10 [ 33.720960] ksys_mmap_pgoff+0x3af/0x500 [ 33.721486] do_syscall_64+0x3f/0x90 [ 33.721964] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 33.722617] RIP: 0033:0x7fc5dbadbd82 [ 33.723077] 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 [ 33.725253] RSP: 002b:00007ffd04583698 EFLAGS: 00000206 ORIG_RAX: 0000000000000009 [ 33.726205] RAX: ffffffffffffffda RBX: 0000000000000812 RCX: 00007fc5dbadbd82 [ 33.727109] RDX: 0000000000000005 RSI: 0000000000001000 RDI: 00007fc5daf15000 [ 33.727990] RBP: 00007fc5daf15000 R08: 0000000000000009 R09: 0000000000001000 [ 33.728873] R10: 0000000000000812 R11: 0000000000000206 R12: 000055e6e408ff70 [ 33.729744] R13: 00007ffd045836b0 R14: 00007ffd045836e0 R15: 00007ffd04583a40 [ 33.730641] [ 33.730941] [ 33.731159] Allocated by task 214: [ 33.731597] kasan_save_stack+0x22/0x50 [ 33.732115] kasan_set_track+0x25/0x30 [ 33.732624] __kasan_slab_alloc+0x59/0x70 [ 33.733163] kmem_cache_alloc+0x16b/0x370 [ 33.733695] vm_area_dup+0x20/0x160 [ 33.734160] __split_vma+0x170/0x950 [ 33.734653] split_vma+0xc6/0x110 [ 33.735105] mprotect_fixup+0x8d2/0xb30 [ 33.735624] do_mprotect_pkey+0x87e/0xd40 [ 33.736159] __x64_sys_mprotect+0x78/0xc0 [ 33.736700] do_syscall_64+0x3f/0x90 [ 33.737187] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 33.737851] [ 33.738074] Freed by task 211: [ 33.738493] kasan_save_stack+0x22/0x50 [ 33.739010] kasan_set_track+0x25/0x30 [ 33.739521] kasan_save_free_info+0x2b/0x50 [ 33.740072] __kasan_slab_free+0x10a/0x190 [ 33.740629] kmem_cache_free+0x10d/0x4d0 [ 33.741152] rcu_core+0x8c8/0x2860 [ 33.741607] __do_softirq+0x1b7/0x7d4 [ 33.742094] [ 33.742314] Last potentially related work creation: [ 33.742930] kasan_save_stack+0x22/0x50 [ 33.743446] __kasan_record_aux_stack+0x8e/0xa0 [ 33.744038] __call_rcu_common.constprop.0+0x6a/0xb90 [ 33.744699] remove_vma+0x139/0x170 [ 33.745162] do_vmi_align_munmap+0xd4a/0x11f0 [ 33.745733] do_vmi_munmap+0x1f1/0x2b0 [ 33.746235] __vm_munmap+0x138/0x3a0 [ 33.746727] __x64_sys_munmap+0x59/0x80 [ 33.747236] do_syscall_64+0x3f/0x90 [ 33.747729] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 33.748387] [ 33.748609] The buggy address belongs to the object at ffff88800e28f570 [ 33.748609] which belongs to the cache vm_area_struct of size 168 [ 33.750124] The buggy address is located 88 bytes inside of [ 33.750124] freed 168-byte region [ffff88800e28f570, ffff88800e28f618) [ 33.751592] [ 33.751812] The buggy address belongs to the physical page: [ 33.752491] page:000000002a7b7487 refcount:1 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0xe28f [ 33.753603] memcg:ffff888015909501 [ 33.754041] flags: 0x100000000000200(slab|node=0|zone=1) [ 33.754713] page_type: 0xffffffff() [ 33.755175] raw: 0100000000000200 ffff88800879fc80 dead000000000122 0000000000000000 [ 33.756129] raw: 0000000000000000 0000000000110011 00000001ffffffff ffff888015909501 [ 33.757071] page dumped because: kasan: bad access detected [ 33.757752] [ 33.757974] Memory state around the buggy address: [ 33.758590] ffff88800e28f480: fc 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 [ 33.759471] ffff88800e28f500: 00 00 00 00 00 00 fc fc fc fc fc fc fc fc fa fb [ 33.760362] >ffff88800e28f580: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb [ 33.761235] ^ [ 33.761921] ffff88800e28f600: fb fb fb fc fc fc fc fc fc fc fc fa fb fb fb fb [ 33.762814] ffff88800e28f680: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb [ 33.763687] ================================================================== [ 33.764718] Disabling lock debugging due to kernel taint [ 35.871600] BUG: Bad rss-counter state mm:00000000891d9537 type:MM_FILEPAGES val:33 [ 35.872822] BUG: Bad rss-counter state mm:00000000891d9537 type:MM_ANONPAGES val:22 [ 36.315843] BUG: Bad rss-counter state mm:000000004aa441c1 type:MM_FILEPAGES val:33 [ 36.316840] BUG: Bad rss-counter state mm:000000004aa441c1 type:MM_ANONPAGES val:22 Warning: Permanently added '[localhost]:31406' (ECDSA) to the list of known hosts. 2023/06/19 12:08:48 fuzzer started 2023/06/19 12:08:48 dialing manager at localhost:44161 2023/06/19 12:08:48 checking machine... 2023/06/19 12:08:48 checking revisions... [ 37.050277] kmemleak: Automatic memory scanning thread ended 2023/06/19 12:08:48 testing simple program... [ 37.102155] cgroup: Unknown subsys name 'net' [ 37.141515] cgroup: Unknown subsys name 'rlimit' executing program executing program executing program VM DIAGNOSIS: 12:08:45 Registers: info registers vcpu 0 RAX=0000000080000000 RBX=0000000000000000 RCX=ffffffff8166884c RDX=ffff888015991b40 RSI=0000000000000000 RDI=0000000000000001 RBP=ffffea0000603300 RSP=ffff8880184f7b08 R8 =0000000000000001 R9 =0000000000000000 R10=0000000000000000 R11=0000000000000000 R12=0000000000000000 R13=ffffea0000603300 R14=ffff8880184f7e00 R15=dffffc0000000000 RIP=ffffffff814c07eb 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 00007f7b7ba0e900 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=00007f7b7bfc3650 CR3=000000000c968000 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=2c2c2c2c2c2c2c2c2c2c2c2c2c2c2c2c XMM01=00ff00000000000000000000000000ff XMM02=00ff00000000000000000000000000ff XMM03=66207463656e6e6f6373696420646576 XMM04=00000000000000000000000000000000 XMM05=00000000000000000000000000000000 XMM06=0d0c0f0e09080b0a0504070601000302 XMM07=00000000000000000000000000000000 XMM08=6500273d2720676e6974636570786500 XMM09=00000000000000000000000000000000 XMM10=00000000000000000000000000000000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000 info registers vcpu 1 RAX=0000000000000001 RBX=0000000000000001 RCX=0000000000000001 RDX=ffff888008d751c0 RSI=ffffffff8161a5aa RDI=0000000000000001 RBP=ffffffff848cebc0 RSP=ffff888008e27d68 R8 =0000000000000001 R9 =0000000000000000 R10=0000000000000001 R11=ffff888008c58400 R12=0000000000000001 R13=0000000000000000 R14=0000000000028aec R15=0000000000000000 RIP=ffffffff814c07f1 RFL=00000002 [-------] 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 0000000000000000 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=00007f7b7b835000 CR3=000000000c968000 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=32e28bb2ca707f5c88326248f9cc80eb XMM02=c20f7dce6db9d3a8c1619070544ccc35 XMM03=be5455307343c7a58653f7909815e35f XMM04=00000000000000000000000000000000 XMM05=00000000000000000000000000000000 XMM06=0d0c0f0e09080b0a0504070601000302 XMM07=0e0d0c0f0a09080b0605040702010003 XMM08=01000000000000000000000000000001 XMM09=00000000000000000000000000000000 XMM10=00000000000000000000000000000000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000