syzkaller login: [ 97.639080] BUG: Bad rss-counter state mm:00000000efb92f0d type:MM_FILEPAGES val:33 [ 97.640278] BUG: Bad rss-counter state mm:00000000efb92f0d type:MM_ANONPAGES val:22 [ 97.770307] ================================================================== [ 97.771213] BUG: KASAN: slab-use-after-free in vma_interval_tree_remove+0xc75/0xec0 [ 97.772144] Read of size 8 at addr ffff88801457f140 by task sshd/218 [ 97.773022] [ 97.773286] CPU: 1 PID: 218 Comm: sshd Tainted: G L 6.4.0-rc7-next-20230619 #1 [ 97.774304] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS 1.12.0-1 04/01/2014 [ 97.775291] Call Trace: [ 97.775610] [ 97.775893] dump_stack_lvl+0x91/0xf0 [ 97.776380] print_report+0xcc/0x620 [ 97.776883] ? __virt_addr_valid+0x102/0x340 [ 97.777434] ? vma_interval_tree_remove+0xc75/0xec0 [ 97.778047] ? vma_interval_tree_remove+0xc75/0xec0 [ 97.778662] kasan_report+0xbe/0xf0 [ 97.779131] ? vma_interval_tree_remove+0xc75/0xec0 [ 97.779751] vma_interval_tree_remove+0xc75/0xec0 [ 97.780355] vma_prepare+0xc54/0x11a0 [ 97.780856] __split_vma+0x5af/0x950 [ 97.781326] ? __pfx___split_vma+0x10/0x10 [ 97.781849] ? find_held_lock+0x2c/0x110 [ 97.782364] do_vmi_align_munmap+0x2ba/0x11f0 [ 97.782922] ? lock_is_held_type+0x9f/0x120 [ 97.783459] ? __pfx_do_vmi_align_munmap+0x10/0x10 [ 97.784067] ? mtree_range_walk+0x632/0x900 [ 97.784646] ? mas_walk+0x5c7/0x7c0 [ 97.785117] do_vmi_munmap+0x1f1/0x2b0 [ 97.785605] mmap_region+0x1f9/0x2660 [ 97.786092] ? vm_mmap_pgoff+0x15c/0x3a0 [ 97.786603] ? __pfx_arch_get_unmapped_area_topdown+0x10/0x10 [ 97.787324] ? __pfx_lock_acquire+0x10/0x10 [ 97.787855] ? __pfx_mmap_region+0x10/0x10 [ 97.788385] ? security_mmap_addr+0x7d/0xa0 [ 97.788918] ? get_unmapped_area+0x1f5/0x3f0 [ 97.789470] do_mmap+0x854/0xf00 [ 97.789904] vm_mmap_pgoff+0x1a6/0x3a0 [ 97.790395] ? __pfx_vm_mmap_pgoff+0x10/0x10 [ 97.790952] ksys_mmap_pgoff+0x3af/0x500 [ 97.791458] do_syscall_64+0x3f/0x90 [ 97.791934] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 97.792596] RIP: 0033:0x7ffa7f1fbd82 [ 97.793051] 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 [ 97.795172] RSP: 002b:00007ffe9b12ede8 EFLAGS: 00000206 ORIG_RAX: 0000000000000009 [ 97.796076] RAX: ffffffffffffffda RBX: 0000000000000812 RCX: 00007ffa7f1fbd82 [ 97.796936] RDX: 0000000000000005 RSI: 0000000000001000 RDI: 00007ffa7e635000 [ 97.797788] RBP: 00007ffa7e635000 R08: 0000000000000009 R09: 0000000000001000 [ 97.798623] R10: 0000000000000812 R11: 0000000000000206 R12: 0000561428c5cd90 [ 97.799465] R13: 00007ffe9b12ee00 R14: 00007ffe9b12ee30 R15: 00007ffe9b12f190 [ 97.800313] [ 97.800638] [ 97.800854] Allocated by task 211: [ 97.801279] kasan_save_stack+0x22/0x50 [ 97.801792] kasan_set_track+0x25/0x30 [ 97.802286] __kasan_slab_alloc+0x59/0x70 [ 97.802809] kmem_cache_alloc+0x16b/0x370 [ 97.803329] vm_area_dup+0x20/0x160 [ 97.803804] __split_vma+0x170/0x950 [ 97.804277] split_vma+0xc6/0x110 [ 97.804741] mprotect_fixup+0x8d2/0xb30 [ 97.805238] do_mprotect_pkey+0x87e/0xd40 [ 97.805755] __x64_sys_mprotect+0x78/0xc0 [ 97.806274] do_syscall_64+0x3f/0x90 [ 97.806755] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 97.807402] [ 97.807623] Freed by task 0: [ 97.808004] kasan_save_stack+0x22/0x50 [ 97.808505] kasan_set_track+0x25/0x30 [ 97.809017] kasan_save_free_info+0x2b/0x50 [ 97.809550] __kasan_slab_free+0x10a/0x190 [ 97.810086] kmem_cache_free+0x10d/0x4d0 [ 97.810588] rcu_core+0x8c8/0x2860 [ 97.811030] __do_softirq+0x1b7/0x7d4 [ 97.811507] [ 97.811729] Last potentially related work creation: [ 97.812314] kasan_save_stack+0x22/0x50 [ 97.812820] __kasan_record_aux_stack+0x8e/0xa0 [ 97.813398] __call_rcu_common.constprop.0+0x6a/0xb90 [ 97.814035] remove_vma+0x139/0x170 [ 97.814485] do_vmi_align_munmap+0xd4a/0x11f0 [ 97.815045] do_vmi_munmap+0x1f1/0x2b0 [ 97.815534] __vm_munmap+0x138/0x3a0 [ 97.815999] __x64_sys_munmap+0x59/0x80 [ 97.816493] do_syscall_64+0x3f/0x90 [ 97.816969] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 97.817606] [ 97.817820] The buggy address belongs to the object at ffff88801457f0e8 [ 97.817820] which belongs to the cache vm_area_struct of size 168 [ 97.819284] The buggy address is located 88 bytes inside of [ 97.819284] freed 168-byte region [ffff88801457f0e8, ffff88801457f190) [ 97.820729] [ 97.820945] The buggy address belongs to the physical page: [ 97.821597] page:00000000765fbc0b refcount:1 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0x1457f [ 97.822689] memcg:ffff88800d97f901 [ 97.823113] flags: 0x100000000000200(slab|node=0|zone=1) [ 97.823752] page_type: 0xffffffff() [ 97.824205] raw: 0100000000000200 ffff88800879fc80 ffffea0000655300 0000000000000004 [ 97.825140] raw: 0000000000000000 0000000000110011 00000001ffffffff ffff88800d97f901 [ 97.826039] page dumped because: kasan: bad access detected [ 97.826694] [ 97.826910] Memory state around the buggy address: [ 97.827498] ffff88801457f000: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 [ 97.828361] ffff88801457f080: 00 00 00 00 00 fc fc fc fc fc fc fc fc fa fb fb [ 97.829235] >ffff88801457f100: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb [ 97.830094] ^ [ 97.830723] ffff88801457f180: fb fb fc fc fc fc fc fc fc fc fa fb fb fb fb fb [ 97.831572] ffff88801457f200: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fc [ 97.832418] ================================================================== [ 97.833597] Disabling lock debugging due to kernel taint [ 99.915034] BUG: Bad rss-counter state mm:00000000baf7e801 type:MM_FILEPAGES val:33 [ 99.916362] BUG: Bad rss-counter state mm:00000000baf7e801 type:MM_ANONPAGES val:22 [ 100.313902] BUG: Bad rss-counter state mm:000000004671ea4f type:MM_FILEPAGES val:33 [ 100.315286] BUG: Bad rss-counter state mm:000000004671ea4f type:MM_ANONPAGES val:22 Warning: Permanently added '[localhost]:55511' (ECDSA) to the list of known hosts. 2023/06/19 16:48:27 fuzzer started 2023/06/19 16:48:28 dialing manager at localhost:44161 2023/06/19 16:48:28 checking machine... 2023/06/19 16:48:28 checking revisions... [ 101.057423] kmemleak: Automatic memory scanning thread ended 2023/06/19 16:48:28 testing simple program... [ 101.110057] cgroup: Unknown subsys name 'net' [ 101.154177] cgroup: Unknown subsys name 'rlimit' executing program executing program executing program VM DIAGNOSIS: 16:47:18 Registers: info registers vcpu 0 RAX=0000000000000000 RBX=ffff88806ce09b18 RCX=0000000000000001 RDX=1ffff1100d9c1364 RSI=ffffffff837447a7 RDI=ffff88806ce09b20 RBP=0000000000000015 RSP=ffff88806ce09a30 R8 =0000000000000001 R9 =ffff88806ce09a90 R10=0000000000038001 R11=0000000000091b52 R12=ffff88806ce09b18 R13=0000000000000000 R14=ffff888016f4d1c0 R15=ffff88800daabe00 RIP=ffffffff813ad485 RFL=00000283 [--S---C] 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 00007f9857eaf900 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=00007f9858466618 CR3=000000001cddc000 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=6e69676f6c5f6d61702c78756e696c65 XMM02=755f6d61702c74696d7265705f6d6170 XMM03=2c766e655f6d61702c7374696d696c5f XMM04=6d61702c766e655f6d61702c7374696d XMM05=78696e755f6d61702c74696d7265705f XMM06=6469756e69676f6c5f6d61702c78756e XMM07=672065736f6c635f6e6f69737365733a XMM08=61662029286e65706f5f746964756100 XMM09=00000000000000000000000000000000 XMM10=00000000000000000000000000000000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000 info registers vcpu 1 RAX=ffff88806cf35000 RBX=0000000000000001 RCX=ffffffff8450c50e RDX=ffffed100d9e6a01 RSI=0000000000000004 RDI=ffffffff812889a5 RBP=dffffc0000000000 RSP=ffff888008e27e70 R8 =0000000000000000 R9 =ffffed100d9e6a00 R10=ffff88806cf35003 R11=ffff888008c58400 R12=ffffffff85d3bed0 R13=1ffff110011c4fd3 R14=0000000000000000 R15=0000000000000000 RIP=ffffffff8450d49f 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=00007f90f8d77000 CR3=000000000d8ce000 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=365e0873bf3c70b3c744e6a128e33b5f XMM02=000000000012a870ec2efd57dc4c00df XMM03=00000000001309f0a8b7d9cc309ec991 XMM04=c35c103b3029d26a00000000000ae988 XMM05=dfcdbad4f1609c370000000000140af0 XMM06=5a3942d74622ff91000000000013f958 XMM07=e042d86d42eb936e0000000000130cc8 XMM08=a8b7d9cc309ec991000000000012a8d0 XMM09=00000000000000000000000000000000 XMM10=20200000000020202020202020200000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000