syzkaller login: [ 31.188757] BUG: Bad rss-counter state mm:00000000ada57cb0 type:MM_FILEPAGES val:33 [ 31.190714] BUG: Bad rss-counter state mm:00000000ada57cb0 type:MM_ANONPAGES val:22 [ 31.350969] ================================================================== [ 31.352025] BUG: KASAN: slab-use-after-free in vma_interval_tree_remove+0xc75/0xec0 [ 31.353158] Read of size 8 at addr ffff88800c595228 by task sshd/221 [ 31.353930] [ 31.354144] CPU: 1 PID: 221 Comm: sshd Not tainted 6.4.0-rc7-next-20230620 #1 [ 31.355034] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS 1.12.0-1 04/01/2014 [ 31.356016] Call Trace: [ 31.356340] [ 31.356624] dump_stack_lvl+0x91/0xf0 [ 31.357124] print_report+0xcc/0x620 [ 31.357606] ? __virt_addr_valid+0x102/0x340 [ 31.358154] ? vma_interval_tree_remove+0xc75/0xec0 [ 31.358765] ? vma_interval_tree_remove+0xc75/0xec0 [ 31.359382] kasan_report+0xbe/0xf0 [ 31.359864] ? vma_interval_tree_remove+0xc75/0xec0 [ 31.360477] vma_interval_tree_remove+0xc75/0xec0 [ 31.361074] vma_prepare+0xc54/0x11a0 [ 31.361545] __split_vma+0x5af/0x950 [ 31.362011] ? __pfx___split_vma+0x10/0x10 [ 31.362550] ? find_held_lock+0x2c/0x110 [ 31.363091] do_vmi_align_munmap+0x2ba/0x11f0 [ 31.363651] ? lock_is_held_type+0x9f/0x120 [ 31.364189] ? __pfx_do_vmi_align_munmap+0x10/0x10 [ 31.364799] ? mtree_range_walk+0x632/0x900 [ 31.365349] ? mas_walk+0x5c7/0x7c0 [ 31.365825] do_vmi_munmap+0x1f1/0x2b0 [ 31.366314] mmap_region+0x1f9/0x2660 [ 31.366793] ? vm_mmap_pgoff+0x15c/0x3a0 [ 31.367312] ? __pfx_arch_get_unmapped_area_topdown+0x10/0x10 [ 31.368020] ? __pfx_lock_acquire+0x10/0x10 [ 31.368551] ? __pfx_mmap_region+0x10/0x10 [ 31.369076] ? security_mmap_addr+0x7d/0xa0 [ 31.369601] ? get_unmapped_area+0x1f5/0x3f0 [ 31.370149] do_mmap+0x854/0xf00 [ 31.370587] vm_mmap_pgoff+0x1a6/0x3a0 [ 31.371084] ? __pfx_vm_mmap_pgoff+0x10/0x10 [ 31.371648] ksys_mmap_pgoff+0x3af/0x500 [ 31.372155] do_syscall_64+0x3f/0x90 [ 31.372635] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 31.373289] RIP: 0033:0x7f86a7900d82 [ 31.373745] 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 [ 31.375901] RSP: 002b:00007ffe87cfca98 EFLAGS: 00000206 ORIG_RAX: 0000000000000009 [ 31.376799] RAX: ffffffffffffffda RBX: 0000000000000812 RCX: 00007f86a7900d82 [ 31.377637] RDX: 0000000000000005 RSI: 0000000000001000 RDI: 00007f86a6d3a000 [ 31.378474] RBP: 00007f86a6d3a000 R08: 0000000000000009 R09: 0000000000001000 [ 31.379337] R10: 0000000000000812 R11: 0000000000000206 R12: 000055d8f2defec0 [ 31.380184] R13: 00007ffe87cfcab0 R14: 00007ffe87cfcae0 R15: 00007ffe87cfce40 [ 31.381045] [ 31.381334] [ 31.381547] Allocated by task 214: [ 31.381972] kasan_save_stack+0x22/0x50 [ 31.382473] kasan_set_track+0x25/0x30 [ 31.382983] __kasan_slab_alloc+0x59/0x70 [ 31.383539] kmem_cache_alloc+0x16b/0x370 [ 31.384055] vm_area_dup+0x20/0x160 [ 31.384507] __split_vma+0x170/0x950 [ 31.384969] split_vma+0xc6/0x110 [ 31.385405] mprotect_fixup+0x8d2/0xb30 [ 31.385908] do_mprotect_pkey+0x87e/0xd40 [ 31.386426] __x64_sys_mprotect+0x78/0xc0 [ 31.386954] do_syscall_64+0x3f/0x90 [ 31.387428] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 31.388071] [ 31.388285] Freed by task 214: [ 31.388688] kasan_save_stack+0x22/0x50 [ 31.389186] kasan_set_track+0x25/0x30 [ 31.389678] kasan_save_free_info+0x2b/0x50 [ 31.390205] __kasan_slab_free+0x10a/0x190 [ 31.390740] kmem_cache_free+0x10d/0x4d0 [ 31.391251] rcu_core+0x8c8/0x2860 [ 31.391692] __do_softirq+0x1b7/0x7d4 [ 31.392168] [ 31.392384] Last potentially related work creation: [ 31.392971] kasan_save_stack+0x22/0x50 [ 31.393470] __kasan_record_aux_stack+0x8e/0xa0 [ 31.394147] __call_rcu_common.constprop.0+0x6a/0xb90 [ 31.394789] remove_vma+0x139/0x170 [ 31.395250] do_vmi_align_munmap+0xd4a/0x11f0 [ 31.395805] do_vmi_munmap+0x1f1/0x2b0 [ 31.396286] __vm_munmap+0x138/0x3a0 [ 31.396751] __x64_sys_munmap+0x59/0x80 [ 31.397250] do_syscall_64+0x3f/0x90 [ 31.397726] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 31.398377] [ 31.398597] The buggy address belongs to the object at ffff88800c5951d0 [ 31.398597] which belongs to the cache vm_area_struct of size 168 [ 31.400073] The buggy address is located 88 bytes inside of [ 31.400073] freed 168-byte region [ffff88800c5951d0, ffff88800c595278) [ 31.401473] [ 31.401692] The buggy address belongs to the physical page: [ 31.402344] page:00000000cf02cb5d refcount:1 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0xc595 [ 31.403439] memcg:ffff88801a27ae01 [ 31.403863] flags: 0x100000000000200(slab|node=0|zone=1) [ 31.404505] page_type: 0xffffffff() [ 31.404953] raw: 0100000000000200 ffff8880087a0c80 dead000000000122 0000000000000000 [ 31.405918] raw: 0000000000000000 0000000000110011 00000001ffffffff ffff88801a27ae01 [ 31.406959] page dumped because: kasan: bad access detected [ 31.407621] [ 31.407854] Memory state around the buggy address: [ 31.408428] ffff88800c595100: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 [ 31.409291] ffff88800c595180: 00 00 fc fc fc fc fc fc fc fc fa fb fb fb fb fb [ 31.410172] >ffff88800c595200: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fc [ 31.411052] ^ [ 31.411613] ffff88800c595280: fc fc fc fc fc fc fc fa fb fb fb fb fb fb fb fb [ 31.412474] ffff88800c595300: fb fb fb fb fb fb fb fb fb fb fb fb fc fc fc fc [ 31.413341] ================================================================== [ 31.414264] Disabling lock debugging due to kernel taint [ 33.674001] BUG: Bad rss-counter state mm:0000000021f47178 type:MM_FILEPAGES val:33 [ 33.675068] BUG: Bad rss-counter state mm:0000000021f47178 type:MM_ANONPAGES val:22 [ 34.155674] BUG: Bad rss-counter state mm:000000002b1d3141 type:MM_FILEPAGES val:33 [ 34.157196] BUG: Bad rss-counter state mm:000000002b1d3141 type:MM_ANONPAGES val:22 Warning: Permanently added '[localhost]:23726' (ECDSA) to the list of known hosts. 2023/06/21 02:56:59 fuzzer started 2023/06/21 02:57:00 dialing manager at localhost:36067 2023/06/21 02:57:00 checking machine... 2023/06/21 02:57:00 checking revisions... [ 34.870770] kmemleak: Automatic memory scanning thread ended 2023/06/21 02:57:00 testing simple program... [ 34.926234] cgroup: Unknown subsys name 'net' [ 34.963558] cgroup: Unknown subsys name 'rlimit' executing program executing program executing program VM DIAGNOSIS: 02:56:59 Registers: info registers vcpu 0 RAX=ffff88806ce35000 RBX=0000000000000000 RCX=ffffffff8451250e RDX=ffffed100d9c6a01 RSI=0000000000000004 RDI=ffffffff81288ac5 RBP=dffffc0000000000 RSP=ffffffff85407e10 R8 =0000000000000000 R9 =ffffed100d9c6a00 R10=ffff88806ce35003 R11=0000000000000001 R12=ffffffff85d3d350 R13=1ffffffff0a80fc7 R14=0000000000000000 R15=0000000000000000 RIP=ffffffff8451349f 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 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=000056226f90f3c8 CR3=0000000005482000 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=00007f2a3397a510000055c198582790 XMM02=6f6974707972636e6561737268746977 XMM03=00000000000000000000000000777074 XMM04=40404040404040404040404040404040 XMM05=5a5a5a5a5a5a5a5a5a5a5a5a5a5a5a5a XMM06=20202020202020202020202020202020 XMM07=ffffffffffff00ffffff00ffffff00ff XMM08=00002000000000202020002020200000 XMM09=ffffffffffff00ffffff00ffffff00ff XMM10=00002000000000202020002020200000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000 info registers vcpu 1 RAX=ffff88800efdf988 RBX=0000000000000001 RCX=0000000000000000 RDX=ffff88800efdf918 RSI=ffff88800efdf928 RDI=0000000000000001 RBP=ffff88800efdfa88 RSP=ffff88800efdf8e0 R8 =0000000000000001 R9 =0000000000000000 R10=0000000000000001 R11=63206e6f69737365 R12=ffff88800efdfe60 R13=0000000000000000 R14=ffff88800885d648 R15=1ffff11001dfbf1d RIP=ffffffff81eeab94 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 00007f2ab1285700 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=00007fcfb8b93300 CR3=0000000016998000 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=6d6f72662064657463656e6e6f637369 XMM02=2e303120746f6f722072657375206d6f XMM03=3a5d3033325b646873732039353a3635 XMM04=6456774875434142334f726f59427469 XMM05=485320415352203a3268737320323238 XMM06=206d6f726620746f6f7220726f662079 XMM07=00000000000000000000000000000000 XMM08=3a677562656420676f6c737973720000 XMM09=00000000000000000000000000000000 XMM10=00000000000000000000000000000000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000