syzkaller login: [ 32.090869] BUG: Bad rss-counter state mm:00000000cd0f15b3 type:MM_FILEPAGES val:33 [ 32.091901] BUG: Bad rss-counter state mm:00000000cd0f15b3 type:MM_ANONPAGES val:22 [ 32.274577] ================================================================== [ 32.275544] BUG: KASAN: slab-use-after-free in vma_interval_tree_remove+0xc75/0xec0 [ 32.276558] Read of size 8 at addr ffff8880102fc798 by task sshd/221 [ 32.277485] [ 32.277718] CPU: 0 PID: 221 Comm: sshd Not tainted 6.4.0-rc7-next-20230619 #1 [ 32.278635] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS 1.12.0-1 04/01/2014 [ 32.279698] Call Trace: [ 32.280041] <TASK> [ 32.280342] dump_stack_lvl+0x91/0xf0 [ 32.280873] print_report+0xcc/0x620 [ 32.281391] ? __virt_addr_valid+0x102/0x340 [ 32.281973] ? vma_interval_tree_remove+0xc75/0xec0 [ 32.282631] ? vma_interval_tree_remove+0xc75/0xec0 [ 32.283288] kasan_report+0xbe/0xf0 [ 32.283799] ? vma_interval_tree_remove+0xc75/0xec0 [ 32.284467] vma_interval_tree_remove+0xc75/0xec0 [ 32.285138] vma_prepare+0xc54/0x11a0 [ 32.285656] __split_vma+0x5af/0x950 [ 32.286169] ? __pfx___split_vma+0x10/0x10 [ 32.286746] ? find_held_lock+0x2c/0x110 [ 32.287304] do_vmi_align_munmap+0x2ba/0x11f0 [ 32.287914] ? lock_is_held_type+0x9f/0x120 [ 32.288495] ? __pfx_do_vmi_align_munmap+0x10/0x10 [ 32.289173] ? mtree_range_walk+0x632/0x900 [ 32.289771] ? mas_walk+0x5c7/0x7c0 [ 32.290290] do_vmi_munmap+0x1f1/0x2b0 [ 32.290817] mmap_region+0x1f9/0x2660 [ 32.291331] ? vm_mmap_pgoff+0x15c/0x3a0 [ 32.291887] ? __pfx_arch_get_unmapped_area_topdown+0x10/0x10 [ 32.292669] ? __pfx_lock_acquire+0x10/0x10 [ 32.293237] ? __pfx_mmap_region+0x10/0x10 [ 32.293804] ? security_mmap_addr+0x7d/0xa0 [ 32.294374] ? get_unmapped_area+0x1f5/0x3f0 [ 32.294955] do_mmap+0x854/0xf00 [ 32.295423] vm_mmap_pgoff+0x1a6/0x3a0 [ 32.295945] ? __pfx_vm_mmap_pgoff+0x10/0x10 [ 32.296545] ksys_mmap_pgoff+0x3af/0x500 [ 32.297137] do_syscall_64+0x3f/0x90 [ 32.297650] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 32.298362] RIP: 0033:0x7f2b83b49d82 [ 32.298870] 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 [ 32.301169] RSP: 002b:00007ffc028c9958 EFLAGS: 00000206 ORIG_RAX: 0000000000000009 [ 32.302136] RAX: ffffffffffffffda RBX: 0000000000000812 RCX: 00007f2b83b49d82 [ 32.303056] RDX: 0000000000000005 RSI: 0000000000001000 RDI: 00007f2b82f83000 [ 32.303987] RBP: 00007f2b82f83000 R08: 0000000000000009 R09: 0000000000001000 [ 32.304929] R10: 0000000000000812 R11: 0000000000000206 R12: 000056231ca5aec0 [ 32.305856] R13: 00007ffc028c9970 R14: 00007ffc028c99a0 R15: 00007ffc028c9d00 [ 32.306803] </TASK> [ 32.307127] [ 32.307360] Allocated by task 214: [ 32.307823] kasan_save_stack+0x22/0x50 [ 32.308377] kasan_set_track+0x25/0x30 [ 32.308934] __kasan_slab_alloc+0x59/0x70 [ 32.309513] kmem_cache_alloc+0x16b/0x370 [ 32.310074] vm_area_dup+0x20/0x160 [ 32.310568] __split_vma+0x170/0x950 [ 32.311075] split_vma+0xc6/0x110 [ 32.311557] mprotect_fixup+0x8d2/0xb30 [ 32.312106] do_mprotect_pkey+0x87e/0xd40 [ 32.312675] __x64_sys_mprotect+0x78/0xc0 [ 32.313244] do_syscall_64+0x3f/0x90 [ 32.313772] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 32.314490] [ 32.314736] Freed by task 214: [ 32.315180] kasan_save_stack+0x22/0x50 [ 32.315744] kasan_set_track+0x25/0x30 [ 32.316303] kasan_save_free_info+0x2b/0x50 [ 32.316919] __kasan_slab_free+0x10a/0x190 [ 32.317505] kmem_cache_free+0x10d/0x4d0 [ 32.318063] rcu_core+0x8c8/0x2860 [ 32.318550] __do_softirq+0x1b7/0x7d4 [ 32.319069] [ 32.319301] Last potentially related work creation: [ 32.319959] kasan_save_stack+0x22/0x50 [ 32.320502] __kasan_record_aux_stack+0x8e/0xa0 [ 32.321156] __call_rcu_common.constprop.0+0x6a/0xb90 [ 32.321863] remove_vma+0x139/0x170 [ 32.322359] do_vmi_align_munmap+0xd4a/0x11f0 [ 32.322971] do_vmi_munmap+0x1f1/0x2b0 [ 32.323504] __vm_munmap+0x138/0x3a0 [ 32.324017] __x64_sys_munmap+0x59/0x80 [ 32.324547] do_syscall_64+0x3f/0x90 [ 32.325075] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 32.325791] [ 32.326021] The buggy address belongs to the object at ffff8880102fc740 [ 32.326021] which belongs to the cache vm_area_struct of size 168 [ 32.327636] The buggy address is located 88 bytes inside of [ 32.327636] freed 168-byte region [ffff8880102fc740, ffff8880102fc7e8) [ 32.329134] [ 32.329366] The buggy address belongs to the physical page: [ 32.330065] page:00000000dae69203 refcount:1 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0x102fc [ 32.331273] memcg:ffff88800eacb201 [ 32.331744] flags: 0x100000000000200(slab|node=0|zone=1) [ 32.332432] page_type: 0xffffffff() [ 32.332949] raw: 0100000000000200 ffff88800879fc80 dead000000000122 0000000000000000 [ 32.333950] raw: 0000000000000000 0000000000110011 00000001ffffffff ffff88800eacb201 [ 32.334955] page dumped because: kasan: bad access detected [ 32.335676] [ 32.335909] Memory state around the buggy address: [ 32.336543] ffff8880102fc680: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 [ 32.337487] ffff8880102fc700: fc fc fc fc fc fc fc fc fa fb fb fb fb fb fb fb [ 32.338426] >ffff8880102fc780: fb fb fb fb fb fb fb fb fb fb fb fb fb fc fc fc [ 32.339358] ^ [ 32.339903] ffff8880102fc800: fc fc fc fc fc fa fb fb fb fb fb fb fb fb fb fb [ 32.340847] ffff8880102fc880: fb fb fb fb fb fb fb fb fb fb fc fc fc fc fc fc [ 32.341791] ================================================================== [ 32.342877] Disabling lock debugging due to kernel taint [ 34.415688] BUG: Bad rss-counter state mm:00000000c9bb1d37 type:MM_FILEPAGES val:33 [ 34.416917] BUG: Bad rss-counter state mm:00000000c9bb1d37 type:MM_ANONPAGES val:22 [ 34.865701] BUG: Bad rss-counter state mm:000000002c1fe3a5 type:MM_FILEPAGES val:33 [ 34.866974] BUG: Bad rss-counter state mm:000000002c1fe3a5 type:MM_ANONPAGES val:22 Warning: Permanently added '[localhost]:34035' (ECDSA) to the list of known hosts. 2023/06/19 18:28:45 fuzzer started 2023/06/19 18:28:45 dialing manager at localhost:44161 2023/06/19 18:28:45 checking machine... 2023/06/19 18:28:45 checking revisions... [ 35.599446] kmemleak: Automatic memory scanning thread ended 2023/06/19 18:28:45 testing simple program... [ 35.654446] cgroup: Unknown subsys name 'net' [ 35.708365] cgroup: Unknown subsys name 'rlimit' executing program executing program executing program VM DIAGNOSIS: 18:28:43 Registers: info registers vcpu 0 RAX=00000000000397e7 RBX=0000000000000001 RCX=ffffffff81f05e03 RDX=00000000000397ed RSI=000000000000f05e RDI=ffffffff86523d3c RBP=ffff888017e879f8 RSP=ffff888017e87930 R8 =0000000000000000 R9 =ffff888017e879e0 R10=0000000000038001 R11=00000000000397e7 R12=ffff888017e87a00 R13=ffff888017e879e8 R14=ffff888017e879e1 R15=ffff888017e879a0 RIP=ffffffff81130837 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 00007f26a6f05900 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=00007f26a74bd0b0 CR3=000000001a254000 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=25252525252525252525252525252525 XMM01=000000000000000000000000000000ff XMM02=000000000000000000000000000000ff XMM03=5320444f4854454d5f54505952434e45 XMM04=40404040404040404040404040404040 XMM05=5a5a5a5a5a5a5a5a5a5a5a5a5a5a5a5a XMM06=20202020202020202020202020202020 XMM07=00000000000000000000000000000000 XMM08=662079726f6d656d20666f2074756f00 XMM09=00000000000000000000000000000000 XMM10=00000000000000000000000000000000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000 info registers vcpu 1 RAX=0000000000000000 RBX=0000000000000001 RCX=ffffffff864bb02e RDX=0000000000000002 RSI=0000000000000000 RDI=0000000000000001 RBP=ffff88806cf09ada RSP=ffff88806cf09a28 R8 =ffffffff864bb032 R9 =ffff88806cf09ad8 R10=0000000000038001 R11=00000000000b6cb2 R12=ffff888008e27dc8 R13=ffff88806cf09ae0 R14=ffff888008e27dc8 R15=ffff88806cf09a98 RIP=ffffffff81131ee2 RFL=00000202 [-------] 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=00007f614859cd70 CR3=000000000d490000 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=4632ced51540d8a90d48a3fefd3c74ed XMM02=ec2efd57dc4c00df000000000011d5f8 XMM03=2bbd3fa00502f744000000000011d6c8 XMM04=2d0d235465e70f9200000000000ae988 XMM05=e4cb8bb95a7664b60000000000134658 XMM06=3724b3ebcb8e04cb00000000001334c0 XMM07=e042d86d42eb936e0000000000124d50 XMM08=2bbd3fa00502f744000000000011d6c8 XMM09=00000000000000000000000000000000 XMM10=20200000000020202020202020200000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000