syzkaller login: [ 28.831632] BUG: Bad rss-counter state mm:000000004cd403b2 type:MM_FILEPAGES val:33 [ 28.833367] BUG: Bad rss-counter state mm:000000004cd403b2 type:MM_ANONPAGES val:22 [ 29.033964] ================================================================== [ 29.035118] BUG: KASAN: slab-use-after-free in vma_interval_tree_remove+0xc75/0xec0 [ 29.036394] Read of size 8 at addr ffff88801030d228 by task sshd/223 [ 29.037311] [ 29.037527] CPU: 0 PID: 223 Comm: sshd Not tainted 6.4.0-rc7-next-20230620 #1 [ 29.038336] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS 1.12.0-1 04/01/2014 [ 29.039247] Call Trace: [ 29.039548] [ 29.039817] dump_stack_lvl+0x91/0xf0 [ 29.040279] print_report+0xcc/0x620 [ 29.040736] ? __virt_addr_valid+0x102/0x340 [ 29.041274] ? vma_interval_tree_remove+0xc75/0xec0 [ 29.041857] ? vma_interval_tree_remove+0xc75/0xec0 [ 29.042436] kasan_report+0xbe/0xf0 [ 29.042887] ? vma_interval_tree_remove+0xc75/0xec0 [ 29.043468] vma_interval_tree_remove+0xc75/0xec0 [ 29.044037] vma_prepare+0xc54/0x11a0 [ 29.044501] __split_vma+0x5af/0x950 [ 29.044993] ? __pfx___split_vma+0x10/0x10 [ 29.045526] ? find_held_lock+0x2c/0x110 [ 29.046080] do_vmi_align_munmap+0x2ba/0x11f0 [ 29.046677] ? lock_is_held_type+0x9f/0x120 [ 29.047214] ? __pfx_do_vmi_align_munmap+0x10/0x10 [ 29.047840] ? mtree_range_walk+0x632/0x900 [ 29.048417] ? mas_walk+0x5c7/0x7c0 [ 29.048920] do_vmi_munmap+0x1f1/0x2b0 [ 29.049430] mmap_region+0x1f9/0x2660 [ 29.049917] ? vm_mmap_pgoff+0x15c/0x3a0 [ 29.050448] ? __pfx_arch_get_unmapped_area_topdown+0x10/0x10 [ 29.051171] ? __pfx_lock_acquire+0x10/0x10 [ 29.051713] ? __pfx_mmap_region+0x10/0x10 [ 29.052246] ? security_mmap_addr+0x7d/0xa0 [ 29.052783] ? get_unmapped_area+0x1f5/0x3f0 [ 29.053365] do_mmap+0x854/0xf00 [ 29.053803] vm_mmap_pgoff+0x1a6/0x3a0 [ 29.054303] ? __pfx_vm_mmap_pgoff+0x10/0x10 [ 29.054874] ksys_mmap_pgoff+0x3af/0x500 [ 29.055385] do_syscall_64+0x3f/0x90 [ 29.055869] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 29.056524] RIP: 0033:0x7fd1c4942d82 [ 29.057026] 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 [ 29.059211] RSP: 002b:00007ffd019288c8 EFLAGS: 00000206 ORIG_RAX: 0000000000000009 [ 29.060121] RAX: ffffffffffffffda RBX: 0000000000000812 RCX: 00007fd1c4942d82 [ 29.060977] RDX: 0000000000000005 RSI: 0000000000001000 RDI: 00007fd1c3d7c000 [ 29.061832] RBP: 00007fd1c3d7c000 R08: 0000000000000009 R09: 0000000000001000 [ 29.062685] R10: 0000000000000812 R11: 0000000000000206 R12: 000055734b6f1ec0 [ 29.063544] R13: 00007ffd019288e0 R14: 00007ffd01928910 R15: 00007ffd01928c70 [ 29.064409] [ 29.064704] [ 29.064929] Allocated by task 214: [ 29.065368] kasan_save_stack+0x22/0x50 [ 29.065896] kasan_set_track+0x25/0x30 [ 29.066412] __kasan_slab_alloc+0x59/0x70 [ 29.066926] kmem_cache_alloc+0x16b/0x370 [ 29.067443] vm_area_dup+0x20/0x160 [ 29.067911] __split_vma+0x170/0x950 [ 29.068351] split_vma+0xc6/0x110 [ 29.068769] mprotect_fixup+0x8d2/0xb30 [ 29.069263] do_mprotect_pkey+0x87e/0xd40 [ 29.069794] __x64_sys_mprotect+0x78/0xc0 [ 29.070331] do_syscall_64+0x3f/0x90 [ 29.070828] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 29.071516] [ 29.071727] Freed by task 214: [ 29.072105] kasan_save_stack+0x22/0x50 [ 29.072579] kasan_set_track+0x25/0x30 [ 29.073053] kasan_save_free_info+0x2b/0x50 [ 29.073558] __kasan_slab_free+0x10a/0x190 [ 29.074060] kmem_cache_free+0x10d/0x4d0 [ 29.074541] rcu_core+0x8c8/0x2860 [ 29.074994] __do_softirq+0x1b7/0x7d4 [ 29.075481] [ 29.075703] Last potentially related work creation: [ 29.076268] kasan_save_stack+0x22/0x50 [ 29.076748] __kasan_record_aux_stack+0x8e/0xa0 [ 29.077302] __call_rcu_common.constprop.0+0x6a/0xb90 [ 29.077933] remove_vma+0x139/0x170 [ 29.078377] do_vmi_align_munmap+0xd4a/0x11f0 [ 29.078917] do_vmi_munmap+0x1f1/0x2b0 [ 29.079385] __vm_munmap+0x138/0x3a0 [ 29.079851] __x64_sys_munmap+0x59/0x80 [ 29.080333] do_syscall_64+0x3f/0x90 [ 29.080801] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 29.081453] [ 29.081676] Second to last potentially related work creation: [ 29.082318] kasan_save_stack+0x22/0x50 [ 29.082796] __kasan_record_aux_stack+0x8e/0xa0 [ 29.083337] __call_rcu_common.constprop.0+0x6a/0xb90 [ 29.083941] remove_vma+0x139/0x170 [ 29.084376] do_vmi_align_munmap+0xd4a/0x11f0 [ 29.084912] do_vmi_munmap+0x1f1/0x2b0 [ 29.085367] mmap_region+0x1f9/0x2660 [ 29.085853] do_mmap+0x854/0xf00 [ 29.086290] vm_mmap_pgoff+0x1a6/0x3a0 [ 29.086786] ksys_mmap_pgoff+0x7d/0x500 [ 29.087286] do_syscall_64+0x3f/0x90 [ 29.087769] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 29.088418] [ 29.088632] The buggy address belongs to the object at ffff88801030d1d0 [ 29.088632] which belongs to the cache vm_area_struct of size 168 [ 29.090145] The buggy address is located 88 bytes inside of [ 29.090145] freed 168-byte region [ffff88801030d1d0, ffff88801030d278) [ 29.091545] [ 29.091763] The buggy address belongs to the physical page: [ 29.092476] page:0000000080194d9a refcount:1 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0x1030d [ 29.093546] memcg:ffff88800e867101 [ 29.093945] anon flags: 0x100000000000200(slab|node=0|zone=1) [ 29.094606] page_type: 0xffffffff() [ 29.095091] raw: 0100000000000200 ffff8880087a0c80 ffffea0000357200 dead000000000003 [ 29.096210] raw: 0000000000000000 0000000000110011 00000001ffffffff ffff88800e867101 [ 29.097350] page dumped because: kasan: bad access detected [ 29.098158] [ 29.098428] Memory state around the buggy address: [ 29.099146] ffff88801030d100: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb [ 29.100189] ffff88801030d180: fb fb fc fc fc fc fc fc fc fc fa fb fb fb fb fb [ 29.101250] >ffff88801030d200: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fc [ 29.102299] ^ [ 29.102984] ffff88801030d280: fc fc fc fc fc fc fc fa fb fb fb fb fb fb fb fb [ 29.104045] ffff88801030d300: fb fb fb fb fb fb fb fb fb fb fb fb fc fc fc fc [ 29.105120] ================================================================== [ 29.106330] Disabling lock debugging due to kernel taint [ 30.858015] BUG: Bad rss-counter state mm:00000000deada6d8 type:MM_FILEPAGES val:33 [ 30.858673] BUG: Bad rss-counter state mm:00000000deada6d8 type:MM_ANONPAGES val:22 [ 31.268400] BUG: Bad rss-counter state mm:00000000cd6a24c4 type:MM_FILEPAGES val:33 [ 31.269583] BUG: Bad rss-counter state mm:00000000cd6a24c4 type:MM_ANONPAGES val:22 Warning: Permanently added '[localhost]:61099' (ECDSA) to the list of known hosts. 2023/06/21 02:55:55 fuzzer started 2023/06/21 02:55:55 dialing manager at localhost:36067 2023/06/21 02:55:55 checking machine... 2023/06/21 02:55:55 checking revisions... [ 31.852356] kmemleak: Automatic memory scanning thread ended 2023/06/21 02:55:55 testing simple program... [ 31.891034] cgroup: Unknown subsys name 'net' [ 31.937790] cgroup: Unknown subsys name 'rlimit' executing program executing program executing program VM DIAGNOSIS: 02:55:55 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=00007ffe555dfc78 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=00007f621b066510000055890a431790 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=ffffffff8180803b RBX=0000000000000003 RCX=0000000000000001 RDX=0000000000092c40 RSI=0000000000000013 RDI=ffff88801687f5c8 RBP=dffffc0000000000 RSP=ffff88801687f520 R8 =0000000000000000 R9 =fffffbfff0ba7a6a R10=ffffffff85d3d357 R11=00000000000b6a61 R12=0000000000000013 R13=0000000000092c40 R14=ffff88801687f5b0 R15=0000000000092c40 RIP=ffffffff813ad625 RFL=00000287 [--S--PC] 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 00007fde85149700 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=00007fc0fb3c34f0 CR3=000000000c5c2000 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=2035353a35353a3230203132206e754a XMM01=73732878696e755f6d6170203a5d3133 XMM02=65736f6c63206e6f6973736573203a29 XMM03=755f6d6170203a5d3133325b64687373 XMM04=69662068637573206f4e203a656c6163 XMM05=3a656c696620766e65206e65706f206f XMM06=65733a6468737328766e655f6d617020 XMM07=6b7a79732034353a35353a3230203132 XMM08=3d656e696c646d632022656369767265 XMM09=00000000000000000000000000000000 XMM10=00000000000000000000000000000000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000