[ 23.854738] BUG: Bad rss-counter state mm:000000008d11884c type:MM_FILEPAGES val:33 [ 23.855738] BUG: Bad rss-counter state mm:000000008d11884c type:MM_ANONPAGES val:22 [ 24.028500] ================================================================== [ 24.029355] BUG: KASAN: slab-use-after-free in vma_interval_tree_remove+0xc75/0xec0 [ 24.030237] Read of size 8 at addr ffff88800c9a43f8 by task sshd/220 [ 24.030952] [ 24.031163] CPU: 1 PID: 220 Comm: sshd Not tainted 6.4.0-rc7-next-20230620 #1 [ 24.032117] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS 1.12.0-1 04/01/2014 [ 24.033040] Call Trace: [ 24.033343] [ 24.033636] dump_stack_lvl+0x91/0xf0 [ 24.034121] print_report+0xcc/0x620 [ 24.034577] ? __virt_addr_valid+0x102/0x340 [ 24.035097] ? vma_interval_tree_remove+0xc75/0xec0 [ 24.035678] ? vma_interval_tree_remove+0xc75/0xec0 [ 24.036261] kasan_report+0xbe/0xf0 [ 24.036712] ? vma_interval_tree_remove+0xc75/0xec0 [ 24.037298] vma_interval_tree_remove+0xc75/0xec0 [ 24.037880] vma_prepare+0xc54/0x11a0 [ 24.038337] __split_vma+0x5af/0x950 [ 24.038788] ? __pfx___split_vma+0x10/0x10 [ 24.039290] ? find_held_lock+0x2c/0x110 [ 24.039785] do_vmi_align_munmap+0x2ba/0x11f0 [ 24.040323] ? lock_is_held_type+0x9f/0x120 [ 24.040841] ? __pfx_do_vmi_align_munmap+0x10/0x10 [ 24.041427] ? mtree_range_walk+0x632/0x900 [ 24.041984] ? mas_walk+0x5c7/0x7c0 [ 24.042447] do_vmi_munmap+0x1f1/0x2b0 [ 24.042915] mmap_region+0x1f9/0x2660 [ 24.043376] ? vm_mmap_pgoff+0x15c/0x3a0 [ 24.043862] ? __pfx_arch_get_unmapped_area_topdown+0x10/0x10 [ 24.044536] ? __pfx_lock_acquire+0x10/0x10 [ 24.045047] ? __pfx_mmap_region+0x10/0x10 [ 24.045560] ? security_mmap_addr+0x7d/0xa0 [ 24.046071] ? get_unmapped_area+0x1f5/0x3f0 [ 24.046595] do_mmap+0x854/0xf00 [ 24.047019] vm_mmap_pgoff+0x1a6/0x3a0 [ 24.047499] ? __pfx_vm_mmap_pgoff+0x10/0x10 [ 24.048036] ksys_mmap_pgoff+0x3af/0x500 [ 24.048528] do_syscall_64+0x3f/0x90 [ 24.048988] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 24.049621] RIP: 0033:0x7f0e86d4ed82 [ 24.050059] 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 [ 24.052081] RSP: 002b:00007ffdc1b102a8 EFLAGS: 00000206 ORIG_RAX: 0000000000000009 [ 24.052956] RAX: ffffffffffffffda RBX: 0000000000000812 RCX: 00007f0e86d4ed82 [ 24.053780] RDX: 0000000000000005 RSI: 0000000000001000 RDI: 00007f0e86188000 [ 24.054598] RBP: 00007f0e86188000 R08: 0000000000000009 R09: 0000000000001000 [ 24.055399] R10: 0000000000000812 R11: 0000000000000206 R12: 00005651b12b7f60 [ 24.056199] R13: 00007ffdc1b102c0 R14: 00007ffdc1b102f0 R15: 00007ffdc1b10650 [ 24.057013] [ 24.057298] [ 24.057506] Allocated by task 213: [ 24.057927] kasan_save_stack+0x22/0x50 [ 24.058424] kasan_set_track+0x25/0x30 [ 24.058891] __kasan_slab_alloc+0x59/0x70 [ 24.059392] kmem_cache_alloc+0x16b/0x370 [ 24.059889] vm_area_dup+0x20/0x160 [ 24.060316] __split_vma+0x170/0x950 [ 24.060759] split_vma+0xc6/0x110 [ 24.061184] mprotect_fixup+0x8d2/0xb30 [ 24.061675] do_mprotect_pkey+0x87e/0xd40 [ 24.062169] __x64_sys_mprotect+0x78/0xc0 [ 24.062668] do_syscall_64+0x3f/0x90 [ 24.063122] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 24.063733] [ 24.063938] Freed by task 213: [ 24.064313] kasan_save_stack+0x22/0x50 [ 24.064795] kasan_set_track+0x25/0x30 [ 24.065266] kasan_save_free_info+0x2b/0x50 [ 24.065791] __kasan_slab_free+0x10a/0x190 [ 24.066300] kmem_cache_free+0x10d/0x4d0 [ 24.066791] rcu_core+0x8c8/0x2860 [ 24.067209] __do_softirq+0x1b7/0x7d4 [ 24.067667] [ 24.067879] Last potentially related work creation: [ 24.068444] kasan_save_stack+0x22/0x50 [ 24.068933] __kasan_record_aux_stack+0x8e/0xa0 [ 24.069481] __call_rcu_common.constprop.0+0x6a/0xb90 [ 24.070115] remove_vma+0x139/0x170 [ 24.070543] do_vmi_align_munmap+0xd4a/0x11f0 [ 24.071072] do_vmi_munmap+0x1f1/0x2b0 [ 24.071529] __vm_munmap+0x138/0x3a0 [ 24.071984] __x64_sys_munmap+0x59/0x80 [ 24.072456] do_syscall_64+0x3f/0x90 [ 24.072913] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 24.073533] [ 24.073740] The buggy address belongs to the object at ffff88800c9a43a0 [ 24.073740] which belongs to the cache vm_area_struct of size 168 [ 24.075147] The buggy address is located 88 bytes inside of [ 24.075147] freed 168-byte region [ffff88800c9a43a0, ffff88800c9a4448) [ 24.076492] [ 24.076699] The buggy address belongs to the physical page: [ 24.077332] page:0000000071944d09 refcount:1 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0xc9a4 [ 24.078386] memcg:ffff88800c995401 [ 24.078790] anon flags: 0x100000000000200(slab|node=0|zone=1) [ 24.079454] page_type: 0xffffffff() [ 24.079877] raw: 0100000000000200 ffff8880087a0c80 0000000000000000 dead000000000001 [ 24.080742] raw: 0000000000000000 0000000000110011 00000001ffffffff ffff88800c995401 [ 24.081596] page dumped because: kasan: bad access detected [ 24.082221] [ 24.082431] Memory state around the buggy address: [ 24.082988] ffff88800c9a4280: fc fc fc fc fc fc fc fa fb fb fb fb fb fb fb fb [ 24.083796] ffff88800c9a4300: fb fb fb fb fb fb fb fb fb fb fb fb fc fc fc fc [ 24.084596] >ffff88800c9a4380: fc fc fc fc fa fb fb fb fb fb fb fb fb fb fb fb [ 24.085397] ^ [ 24.086201] ffff88800c9a4400: fb fb fb fb fb fb fb fb fb fc fc fc fc fc fc fc [ 24.086998] ffff88800c9a4480: fc fa fb fb fb fb fb fb fb fb fb fb fb fb fb fb [ 24.087801] ================================================================== [ 24.088905] Disabling lock debugging due to kernel taint Debian GNU/Linux 11 syzkaller ttyS0 syzkaller login: [ 26.196534] BUG: Bad rss-counter state mm:00000000724d04ff type:MM_FILEPAGES val:33 [ 26.197767] BUG: Bad rss-counter state mm:00000000724d04ff type:MM_ANONPAGES val:22 [ 26.756098] BUG: Bad rss-counter state mm:0000000082fe80e8 type:MM_FILEPAGES val:33 [ 26.757429] BUG: Bad rss-counter state mm:0000000082fe80e8 type:MM_ANONPAGES val:22 Warning: Permanently added '[localhost]:62976' (ECDSA) to the list of known hosts. 2023/06/21 05:54:39 fuzzer started 2023/06/21 05:54:40 dialing manager at localhost:36067 2023/06/21 05:54:40 checking machine... 2023/06/21 05:54:40 checking revisions... [ 27.418742] kmemleak: Automatic memory scanning thread ended 2023/06/21 05:54:40 testing simple program... [ 27.472753] cgroup: Unknown subsys name 'net' [ 27.533825] cgroup: Unknown subsys name 'rlimit' executing program executing program executing program VM DIAGNOSIS: 05:54:39 Registers: info registers vcpu 0 RAX=dffffc0000000000 RBX=ffffffff813ad470 RCX=ffffffff86138e01 RDX=1ffff11002cadf24 RSI=ffffffff8180effe RDI=ffff88801656f990 RBP=ffff88801656f960 RSP=ffff88801656f8c0 R8 =ffffffff86138e90 R9 =ffff88801656f908 R10=0000000000038001 R11=0000000000020d8f R12=ffff88801656f990 R13=0000000000000000 R14=ffff8880193fd1c0 R15=ffff8880189deed8 RIP=ffffffff813ad47e 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 00007f1ac866f900 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=00007fcde10b8000 CR3=000000000ca38000 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=ff0000000000ffff0000000000ff0000 XMM02=ff000000000000ff0000000000ff0000 XMM03=66207463656e6e6f6373696420646576 XMM04=00000000000000000000000000000000 XMM05=00000000000000000000000000000000 XMM06=0d0c0f0e09080b0a0504070601000302 XMM07=00000000000000000000000000000000 XMM08=000a0d732a2e25006c61746166003367 XMM09=00000000000000000000000000000000 XMM10=00000000000000000000000000000000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000 info registers vcpu 1 RAX=ffff88806cf35000 RBX=0000000000000001 RCX=ffffffff8451250e RDX=ffffed100d9e6a01 RSI=0000000000000004 RDI=ffffffff81288ac5 RBP=dffffc0000000000 RSP=ffff888008e07e70 R8 =0000000000000000 R9 =ffffed100d9e6a00 R10=ffff88806cf35003 R11=0000000000000001 R12=ffffffff85d3d350 R13=1ffff110011c0fd3 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 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=00007fffe4e609f8 CR3=0000000005482000 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=00007fbeb012751000005589f20c0790 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