syzkaller login: [ 30.182809] BUG: Bad rss-counter state mm:0000000041d20159 type:MM_FILEPAGES val:33 [ 30.184570] BUG: Bad rss-counter state mm:0000000041d20159 type:MM_ANONPAGES val:22 [ 30.350829] ================================================================== [ 30.351727] BUG: KASAN: slab-use-after-free in vma_interval_tree_remove+0xc75/0xec0 [ 30.352653] Read of size 8 at addr ffff88800e00fa50 by task sshd/218 [ 30.353578] [ 30.353796] CPU: 0 PID: 218 Comm: sshd Not tainted 6.4.0-rc7-next-20230620 #1 [ 30.354656] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS 1.12.0-1 04/01/2014 [ 30.355644] Call Trace: [ 30.355968] [ 30.356255] dump_stack_lvl+0x91/0xf0 [ 30.356747] print_report+0xcc/0x620 [ 30.357265] ? __virt_addr_valid+0x102/0x340 [ 30.357826] ? vma_interval_tree_remove+0xc75/0xec0 [ 30.358436] ? vma_interval_tree_remove+0xc75/0xec0 [ 30.359051] kasan_report+0xbe/0xf0 [ 30.359523] ? vma_interval_tree_remove+0xc75/0xec0 [ 30.360143] vma_interval_tree_remove+0xc75/0xec0 [ 30.360757] vma_prepare+0xc54/0x11a0 [ 30.361244] __split_vma+0x5af/0x950 [ 30.361751] ? __pfx___split_vma+0x10/0x10 [ 30.362308] ? find_held_lock+0x2c/0x110 [ 30.362849] do_vmi_align_munmap+0x2ba/0x11f0 [ 30.363427] ? lock_is_held_type+0x9f/0x120 [ 30.363972] ? __pfx_do_vmi_align_munmap+0x10/0x10 [ 30.364581] ? mtree_range_walk+0x632/0x900 [ 30.365150] ? mas_walk+0x5c7/0x7c0 [ 30.365626] do_vmi_munmap+0x1f1/0x2b0 [ 30.366131] mmap_region+0x1f9/0x2660 [ 30.366625] ? vm_mmap_pgoff+0x15c/0x3a0 [ 30.367141] ? __pfx_arch_get_unmapped_area_topdown+0x10/0x10 [ 30.367857] ? __pfx_lock_acquire+0x10/0x10 [ 30.368382] ? __pfx_mmap_region+0x10/0x10 [ 30.368903] ? security_mmap_addr+0x7d/0xa0 [ 30.369451] ? get_unmapped_area+0x1f5/0x3f0 [ 30.370006] do_mmap+0x854/0xf00 [ 30.370450] vm_mmap_pgoff+0x1a6/0x3a0 [ 30.370948] ? __pfx_vm_mmap_pgoff+0x10/0x10 [ 30.371514] ksys_mmap_pgoff+0x3af/0x500 [ 30.372025] do_syscall_64+0x3f/0x90 [ 30.372503] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 30.373159] RIP: 0033:0x7f066cc5bd82 [ 30.373624] 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 [ 30.375740] RSP: 002b:00007ffd6e18cff8 EFLAGS: 00000206 ORIG_RAX: 0000000000000009 [ 30.376636] RAX: ffffffffffffffda RBX: 0000000000000812 RCX: 00007f066cc5bd82 [ 30.377502] RDX: 0000000000000005 RSI: 0000000000001000 RDI: 00007f066c095000 [ 30.378334] RBP: 00007f066c095000 R08: 0000000000000009 R09: 0000000000001000 [ 30.379198] R10: 0000000000000812 R11: 0000000000000206 R12: 000055ebd1eee980 [ 30.380101] R13: 00007ffd6e18d010 R14: 00007ffd6e18d040 R15: 00007ffd6e18d3a0 [ 30.381012] [ 30.381346] [ 30.381570] Allocated by task 211: [ 30.382030] kasan_save_stack+0x22/0x50 [ 30.382563] kasan_set_track+0x25/0x30 [ 30.383088] __kasan_slab_alloc+0x59/0x70 [ 30.383646] kmem_cache_alloc+0x16b/0x370 [ 30.384194] vm_area_dup+0x20/0x160 [ 30.384677] __split_vma+0x170/0x950 [ 30.385181] split_vma+0xc6/0x110 [ 30.385649] mprotect_fixup+0x8d2/0xb30 [ 30.386180] do_mprotect_pkey+0x87e/0xd40 [ 30.386732] __x64_sys_mprotect+0x78/0xc0 [ 30.387286] do_syscall_64+0x3f/0x90 [ 30.387789] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 30.388467] [ 30.388688] Freed by task 211: [ 30.389091] kasan_save_stack+0x22/0x50 [ 30.389639] kasan_set_track+0x25/0x30 [ 30.390146] kasan_save_free_info+0x2b/0x50 [ 30.390690] __kasan_slab_free+0x10a/0x190 [ 30.391240] kmem_cache_free+0x10d/0x4d0 [ 30.391770] rcu_core+0x8c8/0x2860 [ 30.392228] __do_softirq+0x1b7/0x7d4 [ 30.392722] [ 30.392948] Last potentially related work creation: [ 30.393572] kasan_save_stack+0x22/0x50 [ 30.394100] __kasan_record_aux_stack+0x8e/0xa0 [ 30.394694] __call_rcu_common.constprop.0+0x6a/0xb90 [ 30.395364] remove_vma+0x139/0x170 [ 30.395830] do_vmi_align_munmap+0xd4a/0x11f0 [ 30.396405] do_vmi_munmap+0x1f1/0x2b0 [ 30.396914] __vm_munmap+0x138/0x3a0 [ 30.397417] __x64_sys_munmap+0x59/0x80 [ 30.397917] do_syscall_64+0x3f/0x90 [ 30.398402] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 30.399051] [ 30.399271] The buggy address belongs to the object at ffff88800e00f9f8 [ 30.399271] which belongs to the cache vm_area_struct of size 168 [ 30.400768] The buggy address is located 88 bytes inside of [ 30.400768] freed 168-byte region [ffff88800e00f9f8, ffff88800e00faa0) [ 30.402258] [ 30.402477] The buggy address belongs to the physical page: [ 30.403165] page:0000000055fa840a refcount:1 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0xe00f [ 30.404301] memcg:ffff88800de96e01 [ 30.404748] flags: 0x100000000000200(slab|node=0|zone=1) [ 30.405425] page_type: 0xffffffff() [ 30.405892] raw: 0100000000000200 ffff8880087a0c80 ffffea000038fcc0 dead000000000002 [ 30.406849] raw: 0000000000000000 0000000000110011 00000001ffffffff ffff88800de96e01 [ 30.407789] page dumped because: kasan: bad access detected [ 30.408464] [ 30.408685] Memory state around the buggy address: [ 30.409301] ffff88800e00f900: fc fc fa fb fb fb fb fb fb fb fb fb fb fb fb fb [ 30.410201] ffff88800e00f980: fb fb fb fb fb fb fb fc fc fc fc fc fc fc fc fa [ 30.411095] >ffff88800e00fa00: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb [ 30.411980] ^ [ 30.412712] ffff88800e00fa80: fb fb fb fb fc fc fc fc fc fc fc fc 00 00 00 00 [ 30.413623] ffff88800e00fb00: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 [ 30.414503] ================================================================== [ 30.415616] Disabling lock debugging due to kernel taint [ 32.484744] BUG: Bad rss-counter state mm:00000000e2e2f5ec type:MM_FILEPAGES val:33 [ 32.486147] BUG: Bad rss-counter state mm:00000000e2e2f5ec type:MM_ANONPAGES val:22 [ 32.978934] BUG: Bad rss-counter state mm:0000000002ee5a6a type:MM_FILEPAGES val:33 [ 32.980106] BUG: Bad rss-counter state mm:0000000002ee5a6a type:MM_ANONPAGES val:22 Warning: Permanently added '[localhost]:33619' (ECDSA) to the list of known hosts. 2023/06/21 02:28:18 fuzzer started 2023/06/21 02:28:19 dialing manager at localhost:36067 2023/06/21 02:28:19 checking machine... 2023/06/21 02:28:19 checking revisions... [ 33.626014] kmemleak: Automatic memory scanning thread ended 2023/06/21 02:28:19 testing simple program... [ 33.664681] cgroup: Unknown subsys name 'net' [ 33.708055] cgroup: Unknown subsys name 'rlimit' executing program executing program executing program VM DIAGNOSIS: 02:28:18 Registers: info registers vcpu 0 RAX=000000000000792d RBX=0000000000000002 RCX=ffffffff8118ddc2 RDX=000000000000000a RSI=ffffffff860a1416 RDI=ffffffff85d98e78 RBP=ffff88806ce09af0 RSP=ffff88806ce09a18 R8 =ffffffff860a1416 R9 =ffff88806ce09ad8 R10=0000000000038001 R11=000000000000792d R12=ffff88806ce09af8 R13=ffff88806ce09ae0 R14=ffff88806ce09ad9 R15=ffff88806ce09a98 RIP=ffffffff8112fc12 RFL=00000216 [----AP-] 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 00007fa294545900 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=00007ff9f685d650 CR3=000000000ed18000 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=00000000000000000000000000000000 XMM01=ef4f9564e42d3c862548bf7f96b32020 XMM02=000000000011d6f0d59e07bde36eea69 XMM03=000000000011d818ec2efd57dc4c00df XMM04=c73a7d564f57076500000000000ae988 XMM05=6fb364f14c4924980000000000132850 XMM06=96e98e578ba914f70000000000131280 XMM07=fb795ef6d657705600000000001214c0 XMM08=2c67c8bc2e329bc3000000000011d818 XMM09=00000000000000000000000000000000 XMM10=20200000000020202020202020200000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000 info registers vcpu 1 RAX=ffff88806cf35000 RBX=0000000000000001 RCX=ffffffff8451250e RDX=ffffed100d9e6a01 RSI=0000000000000004 RDI=ffffffff81288ac5 RBP=dffffc0000000000 RSP=ffff888008e07e70 R8 =0000000000000000 R9 =ffffed100d9e6a00 R10=ffff88806cf35003 R11=ffff888008c04400 R12=ffffffff85d3d350 R13=1ffff110011c0fd3 R14=0000000000000000 R15=0000000000000000 RIP=ffffffff8451349f 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 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=0000559e977c2000 CR3=00000000101f2000 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=2038313a38323a3230203132206e754a XMM01=657463656e6e6f63736944203a5d3732 XMM02=302e303120746f6f722072657375206d XMM03=203a5d3732325b646873732072656c6c XMM04=69662068637573206f4e203a656c6163 XMM05=3a656c696620766e65206e65706f206f XMM06=65733a6468737328766e655f6d617020 XMM07=6b7a79732038313a38323a3230203132 XMM08=69767265733d7373616c63742030733a XMM09=00000000000000000000000000000000 XMM10=00000000000000000000000000000000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000