syzkaller login: [ 37.268820] BUG: Bad rss-counter state mm:00000000ff5430ae type:MM_FILEPAGES val:33 [ 37.269791] BUG: Bad rss-counter state mm:00000000ff5430ae type:MM_ANONPAGES val:22 [ 37.424570] ================================================================== [ 37.425550] BUG: KASAN: slab-use-after-free in vma_interval_tree_remove+0xc75/0xec0 [ 37.426283] Read of size 8 at addr ffff888019c20310 by task sshd/220 [ 37.426864] [ 37.427031] CPU: 1 PID: 220 Comm: sshd Not tainted 6.4.0-rc7-next-20230619 #1 [ 37.427839] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS 1.12.0-1 04/01/2014 [ 37.428587] Call Trace: [ 37.428831] [ 37.429059] dump_stack_lvl+0x91/0xf0 [ 37.429440] print_report+0xcc/0x620 [ 37.429818] ? __virt_addr_valid+0x102/0x340 [ 37.430238] ? vma_interval_tree_remove+0xc75/0xec0 [ 37.430712] ? vma_interval_tree_remove+0xc75/0xec0 [ 37.431183] kasan_report+0xbe/0xf0 [ 37.431545] ? vma_interval_tree_remove+0xc75/0xec0 [ 37.432018] vma_interval_tree_remove+0xc75/0xec0 [ 37.432477] vma_prepare+0xc54/0x11a0 [ 37.432851] __split_vma+0x5af/0x950 [ 37.433218] ? __pfx___split_vma+0x10/0x10 [ 37.433623] ? find_held_lock+0x2c/0x110 [ 37.434020] do_vmi_align_munmap+0x2ba/0x11f0 [ 37.434457] ? lock_is_held_type+0x9f/0x120 [ 37.434864] ? __pfx_do_vmi_align_munmap+0x10/0x10 [ 37.435332] ? mtree_range_walk+0x632/0x900 [ 37.435753] ? mas_walk+0x5c7/0x7c0 [ 37.436111] do_vmi_munmap+0x1f1/0x2b0 [ 37.436487] mmap_region+0x1f9/0x2660 [ 37.436873] ? vm_mmap_pgoff+0x15c/0x3a0 [ 37.437269] ? __pfx_arch_get_unmapped_area_topdown+0x10/0x10 [ 37.437815] ? __pfx_lock_acquire+0x10/0x10 [ 37.438224] ? __pfx_mmap_region+0x10/0x10 [ 37.438632] ? security_mmap_addr+0x7d/0xa0 [ 37.439039] ? get_unmapped_area+0x1f5/0x3f0 [ 37.439469] do_mmap+0x854/0xf00 [ 37.439803] vm_mmap_pgoff+0x1a6/0x3a0 [ 37.440182] ? __pfx_vm_mmap_pgoff+0x10/0x10 [ 37.440618] ksys_mmap_pgoff+0x3af/0x500 [ 37.441016] do_syscall_64+0x3f/0x90 [ 37.441380] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 37.441873] RIP: 0033:0x7f9143575d82 [ 37.442218] 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 [ 37.443845] RSP: 002b:00007ffdee7fde58 EFLAGS: 00000206 ORIG_RAX: 0000000000000009 [ 37.444542] RAX: ffffffffffffffda RBX: 0000000000000812 RCX: 00007f9143575d82 [ 37.445194] RDX: 0000000000000005 RSI: 0000000000001000 RDI: 00007f91429af000 [ 37.445845] RBP: 00007f91429af000 R08: 0000000000000009 R09: 0000000000001000 [ 37.446498] R10: 0000000000000812 R11: 0000000000000206 R12: 00005619e6bedec0 [ 37.447150] R13: 00007ffdee7fde70 R14: 00007ffdee7fdea0 R15: 00007ffdee7fe200 [ 37.447807] [ 37.448029] [ 37.448195] Allocated by task 213: [ 37.448520] kasan_save_stack+0x22/0x50 [ 37.448919] kasan_set_track+0x25/0x30 [ 37.449295] __kasan_slab_alloc+0x59/0x70 [ 37.449701] kmem_cache_alloc+0x16b/0x370 [ 37.450094] vm_area_dup+0x20/0x160 [ 37.450444] __split_vma+0x170/0x950 [ 37.450799] split_vma+0xc6/0x110 [ 37.451138] mprotect_fixup+0x8d2/0xb30 [ 37.451533] do_mprotect_pkey+0x87e/0xd40 [ 37.451933] __x64_sys_mprotect+0x78/0xc0 [ 37.452330] do_syscall_64+0x3f/0x90 [ 37.452690] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 37.453183] [ 37.453348] Freed by task 213: [ 37.453649] kasan_save_stack+0x22/0x50 [ 37.454034] kasan_set_track+0x25/0x30 [ 37.454414] kasan_save_free_info+0x2b/0x50 [ 37.454821] __kasan_slab_free+0x10a/0x190 [ 37.455232] kmem_cache_free+0x10d/0x4d0 [ 37.455621] rcu_core+0x8c8/0x2860 [ 37.455960] __do_softirq+0x1b7/0x7d4 [ 37.456322] [ 37.456487] Last potentially related work creation: [ 37.456948] kasan_save_stack+0x22/0x50 [ 37.457339] __kasan_record_aux_stack+0x8e/0xa0 [ 37.457778] __call_rcu_common.constprop.0+0x6a/0xb90 [ 37.458273] remove_vma+0x139/0x170 [ 37.458619] do_vmi_align_munmap+0xd4a/0x11f0 [ 37.459053] do_vmi_munmap+0x1f1/0x2b0 [ 37.459425] __vm_munmap+0x138/0x3a0 [ 37.459785] __x64_sys_munmap+0x59/0x80 [ 37.460163] do_syscall_64+0x3f/0x90 [ 37.460526] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 37.461040] [ 37.461206] The buggy address belongs to the object at ffff888019c202b8 [ 37.461206] which belongs to the cache vm_area_struct of size 168 [ 37.462347] The buggy address is located 88 bytes inside of [ 37.462347] freed 168-byte region [ffff888019c202b8, ffff888019c20360) [ 37.463426] [ 37.463589] The buggy address belongs to the physical page: [ 37.464087] page:00000000d0c7a328 refcount:1 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0x19c20 [ 37.464929] memcg:ffff88800e283101 [ 37.465257] flags: 0x100000000000200(slab|node=0|zone=1) [ 37.465749] page_type: 0xffffffff() [ 37.466093] raw: 0100000000000200 ffff88800879fc80 dead000000000122 0000000000000000 [ 37.466796] raw: 0000000000000000 0000000000110011 00000001ffffffff ffff88800e283101 [ 37.467492] page dumped because: kasan: bad access detected [ 37.467998] [ 37.468160] Memory state around the buggy address: [ 37.468674] ffff888019c20200: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 fc [ 37.469331] ffff888019c20280: fc fc fc fc fc fc fc fa fb fb fb fb fb fb fb fb [ 37.469985] >ffff888019c20300: fb fb fb fb fb fb fb fb fb fb fb fb fc fc fc fc [ 37.470639] ^ [ 37.470994] ffff888019c20380: fc fc fc fc fa fb fb fb fb fb fb fb fb fb fb fb [ 37.471649] ffff888019c20400: fb fb fb fb fb fb fb fb fb fc fc fc fc fc fc fc [ 37.472302] ================================================================== [ 37.473010] Disabling lock debugging due to kernel taint [ 39.760365] BUG: Bad rss-counter state mm:00000000db0c169b type:MM_FILEPAGES val:33 [ 39.762050] BUG: Bad rss-counter state mm:00000000db0c169b type:MM_ANONPAGES val:22 [ 40.276724] BUG: Bad rss-counter state mm:00000000c307e1a8 type:MM_FILEPAGES val:33 [ 40.277921] BUG: Bad rss-counter state mm:00000000c307e1a8 type:MM_ANONPAGES val:22 Warning: Permanently added '[localhost]:1663' (ECDSA) to the list of known hosts. 2023/06/20 00:32:53 fuzzer started 2023/06/20 00:32:53 dialing manager at localhost:44161 2023/06/20 00:32:53 checking machine... 2023/06/20 00:32:53 checking revisions... [ 40.804467] kmemleak: Automatic memory scanning thread ended 2023/06/20 00:32:53 testing simple program... [ 40.843502] cgroup: Unknown subsys name 'net' [ 40.889378] cgroup: Unknown subsys name 'rlimit' executing program executing program executing program VM DIAGNOSIS: 00:32:46 Registers: info registers vcpu 0 RAX=dffffc0000000000 RBX=ffffffff813ad420 RCX=0000000000000001 RDX=1ffff1100d9c134e RSI=ffffffff84531da7 RDI=ffff88806ce09a70 RBP=ffff88806ce09b08 RSP=ffff88806ce09a48 R8 =0000000000000001 R9 =ffff88806ce09ab0 R10=0000000000038001 R11=000000000000fdc6 R12=ffff88806ce09b38 R13=0000000000000000 R14=ffff888016bb1b40 R15=ffff88806ce09a70 RIP=ffffffff811305f0 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 00007fad4aca7900 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=00007fad4b25e618 CR3=000000000fd0e000 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=0000000000000001 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=00007fb8efef96b0 CR3=00000000094da000 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=0fd30de9003fdfb82640333210e31a79 XMM02=ec2efd57dc4c00df000000000011cf58 XMM03=1955e5d36daecde9000000000011d028 XMM04=e07f9221004bdfea00000000000ae988 XMM05=b3ea5078eb18705f0000000000134448 XMM06=4fda316b135da52b0000000000133e40 XMM07=e042d86d42eb936e00000000001246e8 XMM08=1955e5d36daecde9000000000011d028 XMM09=00000000000000000000000000000000 XMM10=20200000000020202020202020200000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000