syzkaller login: [ 46.661745] BUG: Bad rss-counter state mm:00000000ccbc6920 type:MM_FILEPAGES val:33 [ 46.662932] BUG: Bad rss-counter state mm:00000000ccbc6920 type:MM_ANONPAGES val:22 [ 46.746820] ================================================================== [ 46.747726] BUG: KASAN: slab-use-after-free in vma_interval_tree_remove+0xc75/0xec0 [ 46.748671] Read of size 8 at addr ffff88800da2f880 by task sshd/219 [ 46.749436] [ 46.749656] CPU: 1 PID: 219 Comm: sshd Not tainted 6.4.0-rc7-next-20230619 #1 [ 46.750643] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS 1.12.0-1 04/01/2014 [ 46.751617] Call Trace: [ 46.751932] [ 46.752309] dump_stack_lvl+0x91/0xf0 [ 46.752898] print_report+0xcc/0x620 [ 46.753468] ? __virt_addr_valid+0x102/0x340 [ 46.754116] ? vma_interval_tree_remove+0xc75/0xec0 [ 46.754847] ? vma_interval_tree_remove+0xc75/0xec0 [ 46.755569] kasan_report+0xbe/0xf0 [ 46.756126] ? vma_interval_tree_remove+0xc75/0xec0 [ 46.756871] vma_interval_tree_remove+0xc75/0xec0 [ 46.757598] vma_prepare+0xc54/0x11a0 [ 46.758182] __split_vma+0x5af/0x950 [ 46.758774] ? __pfx___split_vma+0x10/0x10 [ 46.759414] ? find_held_lock+0x2c/0x110 [ 46.759937] do_vmi_align_munmap+0x2ba/0x11f0 [ 46.760493] ? lock_is_held_type+0x9f/0x120 [ 46.761028] ? __pfx_do_vmi_align_munmap+0x10/0x10 [ 46.761626] ? mtree_range_walk+0x632/0x900 [ 46.762175] ? mas_walk+0x5c7/0x7c0 [ 46.762656] do_vmi_munmap+0x1f1/0x2b0 [ 46.763154] mmap_region+0x1f9/0x2660 [ 46.763629] ? vm_mmap_pgoff+0x15c/0x3a0 [ 46.764138] ? __pfx_arch_get_unmapped_area_topdown+0x10/0x10 [ 46.764852] ? __pfx_lock_acquire+0x10/0x10 [ 46.765380] ? __pfx_mmap_region+0x10/0x10 [ 46.765918] ? security_mmap_addr+0x7d/0xa0 [ 46.766439] ? get_unmapped_area+0x1f5/0x3f0 [ 46.766994] do_mmap+0x854/0xf00 [ 46.767434] vm_mmap_pgoff+0x1a6/0x3a0 [ 46.767926] ? __pfx_vm_mmap_pgoff+0x10/0x10 [ 46.768486] ksys_mmap_pgoff+0x3af/0x500 [ 46.768994] do_syscall_64+0x3f/0x90 [ 46.769485] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 46.770119] RIP: 0033:0x7f4d102a0d82 [ 46.770577] 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 [ 46.772719] RSP: 002b:00007fffbf066e78 EFLAGS: 00000206 ORIG_RAX: 0000000000000009 [ 46.773615] RAX: ffffffffffffffda RBX: 0000000000000812 RCX: 00007f4d102a0d82 [ 46.774480] RDX: 0000000000000005 RSI: 0000000000001000 RDI: 00007f4d0f6da000 [ 46.775327] RBP: 00007f4d0f6da000 R08: 0000000000000009 R09: 0000000000001000 [ 46.776174] R10: 0000000000000812 R11: 0000000000000206 R12: 0000555639cffd90 [ 46.777024] R13: 00007fffbf066e90 R14: 00007fffbf066ec0 R15: 00007fffbf067220 [ 46.777879] [ 46.778171] [ 46.778388] Allocated by task 212: [ 46.778836] kasan_save_stack+0x22/0x50 [ 46.779341] kasan_set_track+0x25/0x30 [ 46.779834] __kasan_slab_alloc+0x59/0x70 [ 46.780362] kmem_cache_alloc+0x16b/0x370 [ 46.780882] vm_area_dup+0x20/0x160 [ 46.781335] __split_vma+0x170/0x950 [ 46.781806] split_vma+0xc6/0x110 [ 46.782244] mprotect_fixup+0x8d2/0xb30 [ 46.782757] do_mprotect_pkey+0x87e/0xd40 [ 46.783270] __x64_sys_mprotect+0x78/0xc0 [ 46.783789] do_syscall_64+0x3f/0x90 [ 46.784261] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 46.784907] [ 46.785118] Freed by task 209: [ 46.785509] kasan_save_stack+0x22/0x50 [ 46.786012] kasan_set_track+0x25/0x30 [ 46.786502] kasan_save_free_info+0x2b/0x50 [ 46.787043] __kasan_slab_free+0x10a/0x190 [ 46.787575] kmem_cache_free+0x10d/0x4d0 [ 46.788077] rcu_core+0x8c8/0x2860 [ 46.788518] __do_softirq+0x1b7/0x7d4 [ 46.788987] [ 46.789203] Last potentially related work creation: [ 46.789776] kasan_save_stack+0x22/0x50 [ 46.790278] __kasan_record_aux_stack+0x8e/0xa0 [ 46.790871] __call_rcu_common.constprop.0+0x6a/0xb90 [ 46.791575] remove_vma+0x139/0x170 [ 46.792031] do_vmi_align_munmap+0xd4a/0x11f0 [ 46.792582] do_vmi_munmap+0x1f1/0x2b0 [ 46.793070] __vm_munmap+0x138/0x3a0 [ 46.793530] __x64_sys_munmap+0x59/0x80 [ 46.794026] do_syscall_64+0x3f/0x90 [ 46.794502] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 46.795160] [ 46.795372] The buggy address belongs to the object at ffff88800da2f828 [ 46.795372] which belongs to the cache vm_area_struct of size 168 [ 46.796824] The buggy address is located 88 bytes inside of [ 46.796824] freed 168-byte region [ffff88800da2f828, ffff88800da2f8d0) [ 46.798220] [ 46.798436] The buggy address belongs to the physical page: [ 46.799116] page:000000008d37d7fc refcount:1 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0xda2f [ 46.800192] memcg:ffff888018deac01 [ 46.800612] flags: 0x100000000000200(slab|node=0|zone=1) [ 46.801249] page_type: 0xffffffff() [ 46.801699] raw: 0100000000000200 ffff88800879fc80 dead000000000122 0000000000000000 [ 46.802619] raw: 0000000000000000 0000000000110011 00000001ffffffff ffff888018deac01 [ 46.803543] page dumped because: kasan: bad access detected [ 46.804194] [ 46.804409] Memory state around the buggy address: [ 46.804988] ffff88800da2f780: 00 00 00 00 00 00 00 00 00 00 00 00 00 fc fc fc [ 46.805849] ffff88800da2f800: fc fc fc fc fc fa fb fb fb fb fb fb fb fb fb fb [ 46.806732] >ffff88800da2f880: fb fb fb fb fb fb fb fb fb fb fc fc fc fc fc fc [ 46.807590] ^ [ 46.808008] ffff88800da2f900: fc fc fa fb fb fb fb fb fb fb fb fb fb fb fb fb [ 46.808859] ffff88800da2f980: fb fb fb fb fb fb fb fc fc fc fc fc fc fc fc 00 [ 46.809705] ================================================================== [ 46.810618] Disabling lock debugging due to kernel taint [ 48.977418] BUG: Bad rss-counter state mm:0000000085bb75e1 type:MM_FILEPAGES val:33 [ 48.978176] BUG: Bad rss-counter state mm:0000000085bb75e1 type:MM_ANONPAGES val:22 [ 49.387601] BUG: Bad rss-counter state mm:00000000658118e0 type:MM_FILEPAGES val:33 [ 49.388708] BUG: Bad rss-counter state mm:00000000658118e0 type:MM_ANONPAGES val:22 Warning: Permanently added '[localhost]:12957' (ECDSA) to the list of known hosts. 2023/06/20 03:25:20 fuzzer started 2023/06/20 03:25:20 dialing manager at localhost:44161 2023/06/20 03:25:20 checking machine... 2023/06/20 03:25:20 checking revisions... [ 50.020733] kmemleak: Automatic memory scanning thread ended 2023/06/20 03:25:20 testing simple program... [ 50.073020] cgroup: Unknown subsys name 'net' [ 50.113427] cgroup: Unknown subsys name 'rlimit' executing program executing program executing program VM DIAGNOSIS: 03:25:04 Registers: info registers vcpu 0 RAX=ffffed100362457a RBX=ffffed100362457b RCX=ffffffff821587e7 RDX=ffffed100362457b RSI=000000000000005a RDI=ffff88801b122b79 RBP=ffffed100362456f RSP=ffff88800eca7938 R8 =0000000000000001 R9 =ffffed100362457a R10=ffff88801b122bd2 R11=00000000000b6996 R12=ffff88801b122b79 R13=00007f249802648a R14=0000000000000000 R15=000000000000005a RIP=ffffffff8180f009 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 00007f24a127a700 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=00007f94ebc59618 CR3=000000001022a000 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=2030323a35323a3330203032206e754a XMM01=73732878696e755f6d6170203a5d3832 XMM02=65736f6c63206e6f6973736573203a29 XMM03=755f6d6170203a5d3832325b64687373 XMM04=69662068637573206f4e203a656c6163 XMM05=3a656c696620766e65206e65706f206f XMM06=65733a6468737328766e655f6d617020 XMM07=6b7a79732030323a35323a3330203032 XMM08=3d656e696c646d632022656369767265 XMM09=00000000000000000000000000000000 XMM10=00000000000000000000000000000000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000 info registers vcpu 1 RAX=48fd63754157e300 RBX=ffffed100d9e1368 RCX=0000000000000000 RDX=0000000000000001 RSI=0000000000000040 RDI=ffff88806cf09bd0 RBP=ffffffff813782a8 RSP=ffff88806cf09b40 R8 =0000000000000002 R9 =0000000000000006 R10=ffffed10012d2a26 R11=0000000000000000 R12=0000000000000000 R13=ffff88800844f780 R14=ffffffff813782a8 R15=ffff8880096951b0 RIP=ffffffff813ad699 RFL=00000282 [--S----] 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=00007f7fd75bea00 CR3=00000000099b8000 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=15adef9ac69e1fb3a045401319a23bf5 XMM02=0000000000120270ec2efd57dc4c00df XMM03=0000000000124a1079a888f7b6bc92cf XMM04=e2e220e8372236e600000000000ae988 XMM05=dfcdbad4f1609c370000000000134558 XMM06=806171799158d96700000000001343e0 XMM07=e042d86d42eb936e0000000000124c90 XMM08=79a888f7b6bc92cf00000000001202d0 XMM09=00000000000000000000000000000000 XMM10=00000000000000000000000000000000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000