syzkaller login: [ 30.732166] BUG: Bad rss-counter state mm:0000000013a3536d type:MM_FILEPAGES val:33 [ 30.733519] BUG: Bad rss-counter state mm:0000000013a3536d type:MM_ANONPAGES val:22 [ 30.801667] ================================================================== [ 30.802591] BUG: KASAN: slab-use-after-free in vma_interval_tree_remove+0xc75/0xec0 [ 30.803559] Read of size 8 at addr ffff88800cafa6b0 by task sshd/219 [ 30.804331] [ 30.804553] CPU: 1 PID: 219 Comm: sshd Not tainted 6.4.0-rc7-next-20230620 #1 [ 30.805667] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS 1.12.0-1 04/01/2014 [ 30.806638] Call Trace: [ 30.806960] [ 30.807264] dump_stack_lvl+0x91/0xf0 [ 30.807766] print_report+0xcc/0x620 [ 30.808247] ? __virt_addr_valid+0x102/0x340 [ 30.808792] ? vma_interval_tree_remove+0xc75/0xec0 [ 30.809408] ? vma_interval_tree_remove+0xc75/0xec0 [ 30.810031] kasan_report+0xbe/0xf0 [ 30.810505] ? vma_interval_tree_remove+0xc75/0xec0 [ 30.811167] vma_interval_tree_remove+0xc75/0xec0 [ 30.811776] vma_prepare+0xc54/0x11a0 [ 30.812260] __split_vma+0x5af/0x950 [ 30.812733] ? __pfx___split_vma+0x10/0x10 [ 30.813271] ? find_held_lock+0x2c/0x110 [ 30.813790] do_vmi_align_munmap+0x2ba/0x11f0 [ 30.814367] ? lock_is_held_type+0x9f/0x120 [ 30.814918] ? __pfx_do_vmi_align_munmap+0x10/0x10 [ 30.815535] ? mtree_range_walk+0x632/0x900 [ 30.816105] ? mas_walk+0x5c7/0x7c0 [ 30.816578] do_vmi_munmap+0x1f1/0x2b0 [ 30.817075] mmap_region+0x1f9/0x2660 [ 30.817567] ? vm_mmap_pgoff+0x15c/0x3a0 [ 30.818083] ? __pfx_arch_get_unmapped_area_topdown+0x10/0x10 [ 30.818808] ? __pfx_lock_acquire+0x10/0x10 [ 30.819369] ? __pfx_mmap_region+0x10/0x10 [ 30.819916] ? security_mmap_addr+0x7d/0xa0 [ 30.820447] ? get_unmapped_area+0x1f5/0x3f0 [ 30.821005] do_mmap+0x854/0xf00 [ 30.821444] vm_mmap_pgoff+0x1a6/0x3a0 [ 30.821934] ? __pfx_vm_mmap_pgoff+0x10/0x10 [ 30.822499] ksys_mmap_pgoff+0x3af/0x500 [ 30.823017] do_syscall_64+0x3f/0x90 [ 30.823529] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 30.824175] RIP: 0033:0x7f73092d2d82 [ 30.824643] 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 [ 30.826806] RSP: 002b:00007fff38013328 EFLAGS: 00000206 ORIG_RAX: 0000000000000009 [ 30.827772] RAX: ffffffffffffffda RBX: 0000000000000812 RCX: 00007f73092d2d82 [ 30.828619] RDX: 0000000000000005 RSI: 0000000000001000 RDI: 00007f730870c000 [ 30.829465] RBP: 00007f730870c000 R08: 0000000000000009 R09: 0000000000001000 [ 30.830310] R10: 0000000000000812 R11: 0000000000000206 R12: 00005641a6952ec0 [ 30.831171] R13: 00007fff38013340 R14: 00007fff38013370 R15: 00007fff380136d0 [ 30.832035] [ 30.832326] [ 30.832543] Allocated by task 212: [ 30.832968] kasan_save_stack+0x22/0x50 [ 30.833472] kasan_set_track+0x25/0x30 [ 30.833963] __kasan_slab_alloc+0x59/0x70 [ 30.834491] kmem_cache_alloc+0x16b/0x370 [ 30.835006] vm_area_dup+0x20/0x160 [ 30.835473] __split_vma+0x170/0x950 [ 30.835937] split_vma+0xc6/0x110 [ 30.836376] mprotect_fixup+0x8d2/0xb30 [ 30.836876] do_mprotect_pkey+0x87e/0xd40 [ 30.837398] __x64_sys_mprotect+0x78/0xc0 [ 30.837922] do_syscall_64+0x3f/0x90 [ 30.838415] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 30.839062] [ 30.839302] Freed by task 212: [ 30.839701] kasan_save_stack+0x22/0x50 [ 30.840204] kasan_set_track+0x25/0x30 [ 30.840715] kasan_save_free_info+0x2b/0x50 [ 30.841252] __kasan_slab_free+0x10a/0x190 [ 30.841785] kmem_cache_free+0x10d/0x4d0 [ 30.842292] rcu_core+0x8c8/0x2860 [ 30.842742] __do_softirq+0x1b7/0x7d4 [ 30.843231] [ 30.843446] Last potentially related work creation: [ 30.844050] kasan_save_stack+0x22/0x50 [ 30.844565] __kasan_record_aux_stack+0x8e/0xa0 [ 30.845142] __call_rcu_common.constprop.0+0x6a/0xb90 [ 30.845784] remove_vma+0x139/0x170 [ 30.846239] do_vmi_align_munmap+0xd4a/0x11f0 [ 30.846897] do_vmi_munmap+0x1f1/0x2b0 [ 30.847395] __vm_munmap+0x138/0x3a0 [ 30.847864] __x64_sys_munmap+0x59/0x80 [ 30.848360] do_syscall_64+0x3f/0x90 [ 30.848837] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 30.849504] [ 30.849724] The buggy address belongs to the object at ffff88800cafa658 [ 30.849724] which belongs to the cache vm_area_struct of size 168 [ 30.851224] The buggy address is located 88 bytes inside of [ 30.851224] freed 168-byte region [ffff88800cafa658, ffff88800cafa700) [ 30.852621] [ 30.852839] The buggy address belongs to the physical page: [ 30.853497] page:00000000b950b6cf refcount:1 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0xcafa [ 30.854582] memcg:ffff88800f3b1c01 [ 30.855007] flags: 0x100000000000200(slab|node=0|zone=1) [ 30.855656] page_type: 0xffffffff() [ 30.856114] raw: 0100000000000200 ffff8880087a0c80 ffffea00003b65c0 dead00000000000a [ 30.857033] raw: 0000000000000000 0000000000110011 00000001ffffffff ffff88800f3b1c01 [ 30.857935] page dumped because: kasan: bad access detected [ 30.858596] [ 30.858814] Memory state around the buggy address: [ 30.859414] ffff88800cafa580: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb [ 30.860272] ffff88800cafa600: fb fb fb fc fc fc fc fc fc fc fc fa fb fb fb fb [ 30.861122] >ffff88800cafa680: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb [ 30.861969] ^ [ 30.862552] ffff88800cafa700: fc fc fc fc fc fc fc fc 00 00 00 00 00 00 00 00 [ 30.863418] ffff88800cafa780: 00 00 00 00 00 00 00 00 00 00 00 00 00 fc fc fc [ 30.864273] ================================================================== [ 30.865286] Disabling lock debugging due to kernel taint [ 33.869785] BUG: Bad rss-counter state mm:00000000e0b65786 type:MM_FILEPAGES val:33 [ 33.870788] BUG: Bad rss-counter state mm:00000000e0b65786 type:MM_ANONPAGES val:22 [ 34.255390] BUG: Bad rss-counter state mm:0000000079ef46d8 type:MM_FILEPAGES val:33 [ 34.256415] BUG: Bad rss-counter state mm:0000000079ef46d8 type:MM_ANONPAGES val:22 Warning: Permanently added '[localhost]:49152' (ECDSA) to the list of known hosts. 2023/06/20 20:26:21 fuzzer started 2023/06/20 20:26:21 dialing manager at localhost:36067 2023/06/20 20:26:21 checking machine... 2023/06/20 20:26:21 checking revisions... [ 34.979293] kmemleak: Automatic memory scanning thread ended 2023/06/20 20:26:21 testing simple program... [ 35.030598] cgroup: Unknown subsys name 'net' [ 35.069175] cgroup: Unknown subsys name 'rlimit' executing program executing program executing program VM DIAGNOSIS: 20:26:21 Registers: info registers vcpu 0 RAX=ffffffff810bd033 RBX=0000000000000002 RCX=ffffffff86098092 RDX=dffffc0000000000 RSI=ffff88806ce09a90 RDI=1ffff1100d9c135e RBP=ffff88806ce09af0 RSP=ffff88806ce099d8 R8 =ffffffff86098096 R9 =ffff88806ce09ad8 R10=0000000000038001 R11=0000000000006097 R12=ffff88806ce09af8 R13=ffff88806ce09ae0 R14=ffff88806ce09a98 R15=ffff88806ce09a98 RIP=ffffffff8113106f 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 00007fa8af412900 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=00007fa8ae8800a0 CR3=000000000947e000 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=da94db967bdb45ac0b40f4213237f483 XMM02=eff9b2d0a8fce9cb0000000000119b58 XMM03=2c67c8bc2e329bc30000000000119c80 XMM04=cd8fbda7a23b9aaa00000000000ae988 XMM05=283339bb9dacbd7f0000000000132488 XMM06=806171799158d9670000000000131278 XMM07=fb795ef6d657705600000000001215c0 XMM08=2c67c8bc2e329bc30000000000119c80 XMM09=00000000000000000000000000000000 XMM10=20200000000020202020202020200000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000 info registers vcpu 1 RAX=dffffc0000000000 RBX=ffff88801670f558 RCX=0000000000000001 RDX=0000000000000000 RSI=ffffffff81c63c8c RDI=ffff88801670f564 RBP=0000000000000004 RSP=ffff88801670f470 R8 =0000000000000001 R9 =ffff88801670f4d0 R10=0000000000038001 R11=0000000000020cbd R12=ffff88801670f558 R13=0000000000000000 R14=ffff888016779b40 R15=0000000000000000 RIP=ffffffff813ad4ee RFL=00000217 [----APC] 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 00007f591d5e5700 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=00007fe755ed60b0 CR3=00000000094ba000 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=2030323a36323a3032203032206e754a XMM01=73732878696e755f6d6170203a5d3832 XMM02=65736f6c63206e6f6973736573203a29 XMM03=755f6d6170203a5d3832325b64687373 XMM04=69662068637573206f4e203a656c6163 XMM05=3a656c696620766e65206e65706f206f XMM06=65733a6468737328766e655f6d617020 XMM07=6b7a79732030323a36323a3032203032 XMM08=00007f591400faf00000005b00000080 XMM09=00000000000000000000000000000000 XMM10=00000000000000000000000000000000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000