syzkaller login: [ 62.250964] BUG: Bad rss-counter state mm:000000007ee4c0cc type:MM_FILEPAGES val:33 [ 62.252163] BUG: Bad rss-counter state mm:000000007ee4c0cc type:MM_ANONPAGES val:22 [ 62.292331] ================================================================== [ 62.293361] BUG: KASAN: slab-use-after-free in vma_interval_tree_remove+0xc75/0xec0 [ 62.294374] Read of size 8 at addr ffff88801683da50 by task sshd/220 [ 62.295181] [ 62.295398] CPU: 0 PID: 220 Comm: sshd Not tainted 6.4.0-rc7-next-20230619 #1 [ 62.296279] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS 1.12.0-1 04/01/2014 [ 62.297423] Call Trace: [ 62.297842] [ 62.298215] dump_stack_lvl+0x91/0xf0 [ 62.298868] print_report+0xcc/0x620 [ 62.299504] ? __virt_addr_valid+0x102/0x340 [ 62.300230] ? vma_interval_tree_remove+0xc75/0xec0 [ 62.301042] ? vma_interval_tree_remove+0xc75/0xec0 [ 62.301861] kasan_report+0xbe/0xf0 [ 62.302336] ? vma_interval_tree_remove+0xc75/0xec0 [ 62.303013] vma_interval_tree_remove+0xc75/0xec0 [ 62.303632] vma_prepare+0xc54/0x11a0 [ 62.304129] __split_vma+0x5af/0x950 [ 62.304599] ? __pfx___split_vma+0x10/0x10 [ 62.305146] ? find_held_lock+0x2c/0x110 [ 62.305669] do_vmi_align_munmap+0x2ba/0x11f0 [ 62.306238] ? lock_is_held_type+0x9f/0x120 [ 62.306811] ? __pfx_do_vmi_align_munmap+0x10/0x10 [ 62.307413] ? mtree_range_walk+0x632/0x900 [ 62.307977] ? mas_walk+0x5c7/0x7c0 [ 62.308448] do_vmi_munmap+0x1f1/0x2b0 [ 62.308966] mmap_region+0x1f9/0x2660 [ 62.309444] ? vm_mmap_pgoff+0x15c/0x3a0 [ 62.309967] ? __pfx_arch_get_unmapped_area_topdown+0x10/0x10 [ 62.310706] ? __pfx_lock_acquire+0x10/0x10 [ 62.311269] ? __pfx_mmap_region+0x10/0x10 [ 62.311827] ? security_mmap_addr+0x7d/0xa0 [ 62.312362] ? get_unmapped_area+0x1f5/0x3f0 [ 62.312926] do_mmap+0x854/0xf00 [ 62.313372] vm_mmap_pgoff+0x1a6/0x3a0 [ 62.313890] ? __pfx_vm_mmap_pgoff+0x10/0x10 [ 62.314471] ksys_mmap_pgoff+0x3af/0x500 [ 62.315006] do_syscall_64+0x3f/0x90 [ 62.315484] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 62.316139] RIP: 0033:0x7f06bf760d82 [ 62.316602] 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 [ 62.318754] RSP: 002b:00007fff89f38938 EFLAGS: 00000206 ORIG_RAX: 0000000000000009 [ 62.319670] RAX: ffffffffffffffda RBX: 0000000000000812 RCX: 00007f06bf760d82 [ 62.320543] RDX: 0000000000000005 RSI: 0000000000001000 RDI: 00007f06beb9a000 [ 62.321409] RBP: 00007f06beb9a000 R08: 0000000000000009 R09: 0000000000001000 [ 62.322278] R10: 0000000000000812 R11: 0000000000000206 R12: 000055ea49b32d90 [ 62.323185] R13: 00007fff89f38950 R14: 00007fff89f38980 R15: 00007fff89f38ce0 [ 62.324052] [ 62.324345] [ 62.324559] Allocated by task 213: [ 62.325006] kasan_save_stack+0x22/0x50 [ 62.325511] kasan_set_track+0x25/0x30 [ 62.326016] __kasan_slab_alloc+0x59/0x70 [ 62.326543] kmem_cache_alloc+0x16b/0x370 [ 62.327090] vm_area_dup+0x20/0x160 [ 62.327546] __split_vma+0x170/0x950 [ 62.328027] split_vma+0xc6/0x110 [ 62.328474] mprotect_fixup+0x8d2/0xb30 [ 62.328991] do_mprotect_pkey+0x87e/0xd40 [ 62.329508] __x64_sys_mprotect+0x78/0xc0 [ 62.330047] do_syscall_64+0x3f/0x90 [ 62.330536] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 62.331204] [ 62.331419] Freed by task 213: [ 62.331824] kasan_save_stack+0x22/0x50 [ 62.332330] kasan_set_track+0x25/0x30 [ 62.332838] kasan_save_free_info+0x2b/0x50 [ 62.333378] __kasan_slab_free+0x10a/0x190 [ 62.333928] kmem_cache_free+0x10d/0x4d0 [ 62.334455] rcu_core+0x8c8/0x2860 [ 62.334926] __do_softirq+0x1b7/0x7d4 [ 62.335404] [ 62.335629] Last potentially related work creation: [ 62.336229] kasan_save_stack+0x22/0x50 [ 62.336744] __kasan_record_aux_stack+0x8e/0xa0 [ 62.337316] __call_rcu_common.constprop.0+0x6a/0xb90 [ 62.337974] remove_vma+0x139/0x170 [ 62.338434] do_vmi_align_munmap+0xd4a/0x11f0 [ 62.339024] do_vmi_munmap+0x1f1/0x2b0 [ 62.339512] __vm_munmap+0x138/0x3a0 [ 62.339998] __x64_sys_munmap+0x59/0x80 [ 62.340495] do_syscall_64+0x3f/0x90 [ 62.340992] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 62.341639] [ 62.341873] The buggy address belongs to the object at ffff88801683d9f8 [ 62.341873] which belongs to the cache vm_area_struct of size 168 [ 62.343376] The buggy address is located 88 bytes inside of [ 62.343376] freed 168-byte region [ffff88801683d9f8, ffff88801683daa0) [ 62.344790] [ 62.345008] The buggy address belongs to the physical page: [ 62.345667] page:0000000090a9a848 refcount:1 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0x1683d [ 62.346810] memcg:ffff88800f25ca01 [ 62.347237] flags: 0x100000000000200(slab|node=0|zone=1) [ 62.347893] page_type: 0xffffffff() [ 62.348342] raw: 0100000000000200 ffff88800879fc80 dead000000000122 0000000000000000 [ 62.349274] raw: 0000000000000000 0000000000110011 00000001ffffffff ffff88800f25ca01 [ 62.350187] page dumped because: kasan: bad access detected [ 62.350881] [ 62.351096] Memory state around the buggy address: [ 62.351669] ffff88801683d900: fc fc 00 00 00 00 00 00 00 00 00 00 00 00 00 00 [ 62.352528] ffff88801683d980: 00 00 00 00 00 00 00 fc fc fc fc fc fc fc fc fa [ 62.353390] >ffff88801683da00: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb [ 62.354245] ^ [ 62.354985] ffff88801683da80: fb fb fb fb fc fc fc fc fc fc fc fc fa fb fb fb [ 62.355854] ffff88801683db00: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb [ 62.356712] ================================================================== [ 62.357765] Disabling lock debugging due to kernel taint [ 64.319692] BUG: Bad rss-counter state mm:00000000d39a9c4b type:MM_FILEPAGES val:33 [ 64.320703] BUG: Bad rss-counter state mm:00000000d39a9c4b type:MM_ANONPAGES val:22 [ 64.805942] BUG: Bad rss-counter state mm:000000004fd58585 type:MM_FILEPAGES val:33 [ 64.807381] BUG: Bad rss-counter state mm:000000004fd58585 type:MM_ANONPAGES val:22 Warning: Permanently added '[localhost]:64518' (ECDSA) to the list of known hosts. 2023/06/19 13:49:28 fuzzer started 2023/06/19 13:49:28 dialing manager at localhost:44161 2023/06/19 13:49:29 checking machine... 2023/06/19 13:49:29 checking revisions... [ 65.537950] kmemleak: Automatic memory scanning thread ended 2023/06/19 13:49:29 testing simple program... [ 65.588871] cgroup: Unknown subsys name 'net' [ 65.632037] cgroup: Unknown subsys name 'rlimit' executing program executing program executing program VM DIAGNOSIS: 13:49:05 Registers: info registers vcpu 0 RAX=0000000000000000 RBX=0000000000000000 RCX=0000000000000000 RDX=00000000ffffffff RSI=0000000000000056 RDI=0000000000000000 RBP=00007ffc57537980 RSP=00007ffc575376b8 R8 =000000000000006b R9 =0000000000000001 R10=0000000000000017 R11=000055ebb5d99400 R12=00007ffc57537a10 R13=00007ffc575381f0 R14=0000000000000000 R15=00007ffc57537900 RIP=00007f0d1e732720 RFL=00000202 [-------] CPL=3 II=0 A20=1 SMM=0 HLT=0 ES =0000 0000000000000000 00000000 00000000 CS =0033 0000000000000000 ffffffff 00a0fb00 DPL=3 CS64 [-RA] SS =002b 0000000000000000 ffffffff 00c0f300 DPL=3 DS [-WA] DS =0000 0000000000000000 00000000 00000000 FS =0000 00007f0d1dedd900 00000000 00000000 GS =0000 0000000000000000 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=00007f0d1d2cbd50 CR3=000000000ef74000 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=000000000010c9e82fccd54c36d8a3f3 XMM01=0f7728b295e2b5be214d427f316af3d0 XMM02=000000000011d640eff9b2d0a8fce9cb XMM03=000000000011d7102c67c8bc2e329bc3 XMM04=e8c6faf800c8b80c00000000000ae988 XMM05=19e9129bd510f2350000000000133db8 XMM06=4fda316b135da52b0000000000133c40 XMM07=e042d86d42eb936e0000000000124750 XMM08=95ea747987973716000000000011d710 XMM09=00000000000000000000000000000000 XMM10=00000000000000000000000000000000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000 info registers vcpu 1 RAX=0000000000000002 RBX=0000000000000002 RCX=ffffffff8613751a RDX=0000000000000008 RSI=ffff88806cf09de0 RDI=ffff88806cf09a98 RBP=ffff88806cf09af0 RSP=ffff88806cf09a28 R8 =ffffffff8613751e R9 =ffff88806cf09ad8 R10=0000000000038001 R11=0000000000020d8a R12=ffff88806cf09af8 R13=ffff88806cf09ae0 R14=ffff88806cf09de8 R15=ffff88806cf09a98 RIP=ffffffff81131023 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 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=00007fd5338a4650 CR3=00000000158bc000 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=2038323a39343a3331203931206e754a XMM01=73732878696e755f6d6170203a5d3932 XMM02=65736f6c63206e6f6973736573203a29 XMM03=755f6d6170203a5d3932325b64687373 XMM04=69662068637573206f4e203a656c6163 XMM05=3a656c696620766e65206e65706f206f XMM06=65733a6468737328766e655f6d617020 XMM07=6b7a79732038323a39343a3331203931 XMM08=3d656e696c646d632022656369767265 XMM09=00000000000000000000000000000000 XMM10=00000000000000000000000000000000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000