syzkaller login: [ 39.183679] BUG: Bad rss-counter state mm:0000000086efea6d type:MM_FILEPAGES val:33 [ 39.184521] BUG: Bad rss-counter state mm:0000000086efea6d type:MM_ANONPAGES val:22 [ 39.322349] ================================================================== [ 39.323040] BUG: KASAN: slab-use-after-free in vma_interval_tree_remove+0xc75/0xec0 [ 39.323764] Read of size 8 at addr ffff88800e395a50 by task sshd/219 [ 39.324350] [ 39.324635] CPU: 1 PID: 219 Comm: sshd Not tainted 6.4.0-rc7-next-20230619 #1 [ 39.325354] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS 1.12.0-1 04/01/2014 [ 39.326095] Call Trace: [ 39.326338] [ 39.326557] dump_stack_lvl+0x91/0xf0 [ 39.326944] print_report+0xcc/0x620 [ 39.327314] ? __virt_addr_valid+0x102/0x340 [ 39.327742] ? vma_interval_tree_remove+0xc75/0xec0 [ 39.328212] ? vma_interval_tree_remove+0xc75/0xec0 [ 39.328685] kasan_report+0xbe/0xf0 [ 39.329069] ? vma_interval_tree_remove+0xc75/0xec0 [ 39.329542] vma_interval_tree_remove+0xc75/0xec0 [ 39.330000] vma_prepare+0xc54/0x11a0 [ 39.330364] __split_vma+0x5af/0x950 [ 39.330723] ? __pfx___split_vma+0x10/0x10 [ 39.331125] ? find_held_lock+0x2c/0x110 [ 39.331525] do_vmi_align_munmap+0x2ba/0x11f0 [ 39.331954] ? lock_is_held_type+0x9f/0x120 [ 39.332361] ? __pfx_do_vmi_align_munmap+0x10/0x10 [ 39.332832] ? mtree_range_walk+0x632/0x900 [ 39.333257] ? mas_walk+0x5c7/0x7c0 [ 39.333620] do_vmi_munmap+0x1f1/0x2b0 [ 39.333997] mmap_region+0x1f9/0x2660 [ 39.334368] ? vm_mmap_pgoff+0x15c/0x3a0 [ 39.334759] ? __pfx_arch_get_unmapped_area_topdown+0x10/0x10 [ 39.335308] ? __pfx_lock_acquire+0x10/0x10 [ 39.335719] ? __pfx_mmap_region+0x10/0x10 [ 39.336124] ? security_mmap_addr+0x7d/0xa0 [ 39.336530] ? get_unmapped_area+0x1f5/0x3f0 [ 39.336962] do_mmap+0x854/0xf00 [ 39.337297] vm_mmap_pgoff+0x1a6/0x3a0 [ 39.337677] ? __pfx_vm_mmap_pgoff+0x10/0x10 [ 39.338112] ksys_mmap_pgoff+0x3af/0x500 [ 39.338498] do_syscall_64+0x3f/0x90 [ 39.338868] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 39.339370] RIP: 0033:0x7fedf70ccd82 [ 39.339723] 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 [ 39.341394] RSP: 002b:00007ffe00d77088 EFLAGS: 00000206 ORIG_RAX: 0000000000000009 [ 39.342089] RAX: ffffffffffffffda RBX: 0000000000000812 RCX: 00007fedf70ccd82 [ 39.342750] RDX: 0000000000000005 RSI: 0000000000001000 RDI: 00007fedf6506000 [ 39.343402] RBP: 00007fedf6506000 R08: 0000000000000009 R09: 0000000000001000 [ 39.344061] R10: 0000000000000812 R11: 0000000000000206 R12: 000055c2b16c3ec0 [ 39.344716] R13: 00007ffe00d770a0 R14: 00007ffe00d770d0 R15: 00007ffe00d77430 [ 39.345382] [ 39.345604] [ 39.345772] Allocated by task 212: [ 39.346106] kasan_save_stack+0x22/0x50 [ 39.346492] kasan_set_track+0x25/0x30 [ 39.346875] __kasan_slab_alloc+0x59/0x70 [ 39.347277] kmem_cache_alloc+0x16b/0x370 [ 39.347672] vm_area_dup+0x20/0x160 [ 39.348024] __split_vma+0x170/0x950 [ 39.348380] split_vma+0xc6/0x110 [ 39.348721] mprotect_fixup+0x8d2/0xb30 [ 39.349114] do_mprotect_pkey+0x87e/0xd40 [ 39.349516] __x64_sys_mprotect+0x78/0xc0 [ 39.349915] do_syscall_64+0x3f/0x90 [ 39.350280] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 39.350773] [ 39.350940] Freed by task 203: [ 39.351240] kasan_save_stack+0x22/0x50 [ 39.351625] kasan_set_track+0x25/0x30 [ 39.352004] kasan_save_free_info+0x2b/0x50 [ 39.352411] __kasan_slab_free+0x10a/0x190 [ 39.352843] kmem_cache_free+0x10d/0x4d0 [ 39.353233] rcu_core+0x8c8/0x2860 [ 39.353576] __do_softirq+0x1b7/0x7d4 [ 39.353938] [ 39.354102] Last potentially related work creation: [ 39.354552] kasan_save_stack+0x22/0x50 [ 39.354935] __kasan_record_aux_stack+0x8e/0xa0 [ 39.355373] __call_rcu_common.constprop.0+0x6a/0xb90 [ 39.355879] remove_vma+0x139/0x170 [ 39.356227] do_vmi_align_munmap+0xd4a/0x11f0 [ 39.356657] do_vmi_munmap+0x1f1/0x2b0 [ 39.357037] __vm_munmap+0x138/0x3a0 [ 39.357395] __x64_sys_munmap+0x59/0x80 [ 39.357782] do_syscall_64+0x3f/0x90 [ 39.358146] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 39.358645] [ 39.358810] The buggy address belongs to the object at ffff88800e3959f8 [ 39.358810] which belongs to the cache vm_area_struct of size 168 [ 39.359936] The buggy address is located 88 bytes inside of [ 39.359936] freed 168-byte region [ffff88800e3959f8, ffff88800e395aa0) [ 39.361031] [ 39.361198] The buggy address belongs to the physical page: [ 39.361703] page:00000000af31b405 refcount:1 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0xe395 [ 39.362536] memcg:ffff88800ddec901 [ 39.362872] anon flags: 0x100000000000200(slab|node=0|zone=1) [ 39.363404] page_type: 0xffffffff() [ 39.363750] raw: 0100000000000200 ffff88800879fc80 0000000000000000 dead000000000001 [ 39.364458] raw: 0000000000000000 0000000000110011 00000001ffffffff ffff88800ddec901 [ 39.365166] page dumped because: kasan: bad access detected [ 39.365683] [ 39.365847] Memory state around the buggy address: [ 39.366347] ffff88800e395900: fc fc fa fb fb fb fb fb fb fb fb fb fb fb fb fb [ 39.367005] ffff88800e395980: fb fb fb fb fb fb fb fc fc fc fc fc fc fc fc fa [ 39.367661] >ffff88800e395a00: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb [ 39.368314] ^ [ 39.368866] ffff88800e395a80: fb fb fb fb fc fc fc fc fc fc fc fc fa fb fb fb [ 39.369525] ffff88800e395b00: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb [ 39.370173] ================================================================== [ 39.370869] Disabling lock debugging due to kernel taint [ 41.376267] BUG: Bad rss-counter state mm:000000003bd2638c type:MM_FILEPAGES val:33 [ 41.377413] BUG: Bad rss-counter state mm:000000003bd2638c type:MM_ANONPAGES val:22 [ 41.849111] BUG: Bad rss-counter state mm:00000000f4f97f46 type:MM_FILEPAGES val:33 [ 41.850100] BUG: Bad rss-counter state mm:00000000f4f97f46 type:MM_ANONPAGES val:22 Warning: Permanently added '[localhost]:62279' (ECDSA) to the list of known hosts. 2023/06/19 12:00:38 fuzzer started 2023/06/19 12:00:39 dialing manager at localhost:44161 2023/06/19 12:00:39 checking machine... 2023/06/19 12:00:39 checking revisions... [ 42.585981] kmemleak: Automatic memory scanning thread ended 2023/06/19 12:00:39 testing simple program... [ 42.649782] cgroup: Unknown subsys name 'net' [ 42.713743] cgroup: Unknown subsys name 'rlimit' executing program executing program executing program VM DIAGNOSIS: 12:00:38 Registers: info registers vcpu 0 RAX=000000000000009d RBX=0000000000000000 RCX=0000000000000100 RDX=ffffc90000660000 RSI=ffff88800f3a0e70 RDI=ffff88800f3a1040 RBP=ffff88800f3a1428 RSP=ffff88806ce09ca0 R8 =0000000000000001 R9 =0000000000000000 R10=0000000000000000 R11=00000000000b6996 R12=0000000000000001 R13=0000000000004e20 R14=0000000000000001 R15=0000000000000001 RIP=ffffffff83021617 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 00007f8d78814900 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=00005609bcece218 CR3=0000000016d56000 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=ffffffffffff00000000000000000000 XMM02=ffffffffffff00000000000000000000 XMM03=00000000000000000000000000000000 XMM04=00000000000000000000000000000000 XMM05=00000000000000000000000000000000 XMM06=00000000000000000000000000000000 XMM07=00000000000000000000000000000000 XMM08=00000000000073707574726174732064 XMM09=00000000000000000000000000000000 XMM10=00000000000000000000000000000000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000 info registers vcpu 1 RAX=0000000080000001 RBX=1ffff11002f8df48 RCX=0000000080000001 RDX=ffff888016859b40 RSI=ffffffff81efeece RDI=ffff888019adc500 RBP=ffff88800b681700 RSP=ffff888017c6fa30 R8 =0000000000000003 R9 =0000000000000005 R10=0000000000000002 R11=2e302e303120746f R12=ffff888019adc500 R13=dffffc0000000000 R14=ffff888019adc500 R15=ffff88800fdb0860 RIP=ffffffff814c07f1 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 00007f4ece4dc900 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=00005609bcef6768 CR3=000000000ffd8000 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=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