syzkaller login: [ 32.601723] BUG: Bad rss-counter state mm:0000000095a50751 type:MM_FILEPAGES val:33 [ 32.602842] BUG: Bad rss-counter state mm:0000000095a50751 type:MM_ANONPAGES val:22 [ 32.861057] ================================================================== [ 32.862068] BUG: KASAN: slab-use-after-free in vma_interval_tree_remove+0xc75/0xec0 [ 32.863128] Read of size 8 at addr ffff88801a8f0968 by task sshd/220 [ 32.864192] [ 32.864436] CPU: 1 PID: 220 Comm: sshd Not tainted 6.4.0-rc7-next-20230619 #1 [ 32.865398] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS 1.12.0-1 04/01/2014 [ 32.866496] Call Trace: [ 32.866867] [ 32.867184] dump_stack_lvl+0x91/0xf0 [ 32.867741] print_report+0xcc/0x620 [ 32.868282] ? __virt_addr_valid+0x102/0x340 [ 32.868904] ? vma_interval_tree_remove+0xc75/0xec0 [ 32.869595] ? vma_interval_tree_remove+0xc75/0xec0 [ 32.870288] kasan_report+0xbe/0xf0 [ 32.870852] ? vma_interval_tree_remove+0xc75/0xec0 [ 32.871564] vma_interval_tree_remove+0xc75/0xec0 [ 32.872237] vma_prepare+0xc54/0x11a0 [ 32.872774] __split_vma+0x5af/0x950 [ 32.873300] ? __pfx___split_vma+0x10/0x10 [ 32.873893] ? find_held_lock+0x2c/0x110 [ 32.874474] do_vmi_align_munmap+0x2ba/0x11f0 [ 32.875114] ? lock_is_held_type+0x9f/0x120 [ 32.875708] ? __pfx_do_vmi_align_munmap+0x10/0x10 [ 32.876373] ? mtree_range_walk+0x632/0x900 [ 32.876990] ? mas_walk+0x5c7/0x7c0 [ 32.877520] do_vmi_munmap+0x1f1/0x2b0 [ 32.878080] mmap_region+0x1f9/0x2660 [ 32.878632] ? vm_mmap_pgoff+0x15c/0x3a0 [ 32.879220] ? __pfx_arch_get_unmapped_area_topdown+0x10/0x10 [ 32.880031] ? __pfx_lock_acquire+0x10/0x10 [ 32.880639] ? __pfx_mmap_region+0x10/0x10 [ 32.881238] ? security_mmap_addr+0x7d/0xa0 [ 32.881850] ? get_unmapped_area+0x1f5/0x3f0 [ 32.882476] do_mmap+0x854/0xf00 [ 32.882996] vm_mmap_pgoff+0x1a6/0x3a0 [ 32.883560] ? __pfx_vm_mmap_pgoff+0x10/0x10 [ 32.884199] ksys_mmap_pgoff+0x3af/0x500 [ 32.884775] do_syscall_64+0x3f/0x90 [ 32.885339] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 32.886052] RIP: 0033:0x7f32f5ba7d82 [ 32.886558] 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 [ 32.888971] RSP: 002b:00007ffefb237948 EFLAGS: 00000206 ORIG_RAX: 0000000000000009 [ 32.889993] RAX: ffffffffffffffda RBX: 0000000000000812 RCX: 00007f32f5ba7d82 [ 32.890944] RDX: 0000000000000005 RSI: 0000000000001000 RDI: 00007f32f4fe1000 [ 32.891888] RBP: 00007f32f4fe1000 R08: 0000000000000009 R09: 0000000000001000 [ 32.892844] R10: 0000000000000812 R11: 0000000000000206 R12: 0000556d35102b20 [ 32.893772] R13: 00007ffefb237960 R14: 00007ffefb237990 R15: 00007ffefb237cf0 [ 32.894727] [ 32.895071] [ 32.895310] Allocated by task 213: [ 32.895791] kasan_save_stack+0x22/0x50 [ 32.896355] kasan_set_track+0x25/0x30 [ 32.896916] __kasan_slab_alloc+0x59/0x70 [ 32.897505] kmem_cache_alloc+0x16b/0x370 [ 32.898077] vm_area_dup+0x20/0x160 [ 32.898584] __split_vma+0x170/0x950 [ 32.899113] split_vma+0xc6/0x110 [ 32.899604] mprotect_fixup+0x8d2/0xb30 [ 32.900153] do_mprotect_pkey+0x87e/0xd40 [ 32.900732] __x64_sys_mprotect+0x78/0xc0 [ 32.901309] do_syscall_64+0x3f/0x90 [ 32.901834] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 32.902556] [ 32.902816] Freed by task 213: [ 32.903266] kasan_save_stack+0x22/0x50 [ 32.903833] kasan_set_track+0x25/0x30 [ 32.904375] kasan_save_free_info+0x2b/0x50 [ 32.904970] __kasan_slab_free+0x10a/0x190 [ 32.905558] kmem_cache_free+0x10d/0x4d0 [ 32.906124] rcu_core+0x8c8/0x2860 [ 32.906629] __do_softirq+0x1b7/0x7d4 [ 32.907165] [ 32.907401] Last potentially related work creation: [ 32.908047] kasan_save_stack+0x22/0x50 [ 32.908621] __kasan_record_aux_stack+0x8e/0xa0 [ 32.909262] __call_rcu_common.constprop.0+0x6a/0xb90 [ 32.909982] remove_vma+0x139/0x170 [ 32.910493] do_vmi_align_munmap+0xd4a/0x11f0 [ 32.911124] do_vmi_munmap+0x1f1/0x2b0 [ 32.911665] __vm_munmap+0x138/0x3a0 [ 32.912186] __x64_sys_munmap+0x59/0x80 [ 32.912754] do_syscall_64+0x3f/0x90 [ 32.913282] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 32.914002] [ 32.914246] The buggy address belongs to the object at ffff88801a8f0910 [ 32.914246] which belongs to the cache vm_area_struct of size 168 [ 32.915905] The buggy address is located 88 bytes inside of [ 32.915905] freed 168-byte region [ffff88801a8f0910, ffff88801a8f09b8) [ 32.917489] [ 32.917735] The buggy address belongs to the physical page: [ 32.918482] page:0000000072fa536b refcount:1 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0x1a8f0 [ 32.919720] memcg:ffff88800e41cc01 [ 32.920200] flags: 0x100000000000200(slab|node=0|zone=1) [ 32.920931] page_type: 0xffffffff() [ 32.921439] raw: 0100000000000200 ffff88800879fc80 dead000000000122 0000000000000000 [ 32.922477] raw: 0000000000000000 0000000000110011 00000001ffffffff ffff88800e41cc01 [ 32.923513] page dumped because: kasan: bad access detected [ 32.924259] [ 32.924504] Memory state around the buggy address: [ 32.925160] ffff88801a8f0800: fc fc fc fc fc 00 00 00 00 00 00 00 00 00 00 00 [ 32.926125] ffff88801a8f0880: 00 00 00 00 00 00 00 00 00 00 fc fc fc fc fc fc [ 32.927099] >ffff88801a8f0900: fc fc fa fb fb fb fb fb fb fb fb fb fb fb fb fb [ 32.928069] ^ [ 32.928966] ffff88801a8f0980: fb fb fb fb fb fb fb fc fc fc fc fc fc fc fc fa [ 32.929937] ffff88801a8f0a00: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb [ 32.930927] ================================================================== [ 32.932265] Disabling lock debugging due to kernel taint [ 35.675214] BUG: Bad rss-counter state mm:00000000fe1107c7 type:MM_FILEPAGES val:33 [ 35.676279] BUG: Bad rss-counter state mm:00000000fe1107c7 type:MM_ANONPAGES val:22 Warning: Permanently added '[localhost]:17249' (ECDSA) to the list of known hosts. [ 36.264453] BUG: Bad rss-counter state mm:00000000bd6d671e type:MM_FILEPAGES val:33 [ 36.265698] BUG: Bad rss-counter state mm:00000000bd6d671e type:MM_ANONPAGES val:22 2023/06/19 12:41:17 fuzzer started 2023/06/19 12:41:17 dialing manager at localhost:44161 2023/06/19 12:41:17 checking machine... 2023/06/19 12:41:17 checking revisions... [ 36.880570] kmemleak: Automatic memory scanning thread ended 2023/06/19 12:41:18 testing simple program... [ 36.929276] cgroup: Unknown subsys name 'net' [ 36.988367] cgroup: Unknown subsys name 'rlimit' executing program executing program executing program VM DIAGNOSIS: 12:41:16 Registers: info registers vcpu 0 RAX=0000000080000000 RBX=dffffc0000000000 RCX=0000000080000000 RDX=ffff888016c39b40 RSI=ffffffff815a8173 RDI=0000000000000006 RBP=ffff88801466fd28 RSP=ffff88801466fc58 R8 =0000000000000006 R9 =00000000c000003e R10=00000000c000003e R11=0000000000000000 R12=00000000c000003e R13=ffff88801466fd60 R14=00000000c000003e R15=ffffc9000064e070 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 00007fd8ab1c4900 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=00007f3450cb6650 CR3=000000000d626000 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=ffffffffffffffffffffffffffffffff XMM01=30306234386136303638616663356134 XMM02=38303062343861363036386166633561 XMM03=2f6c616e72756f6a2f676f6c2f6e7572 XMM04=c832ce13090bd09a00000000000ae988 XMM05=6fc25d050d94d98300000000001345a0 XMM06=9ae1324bb4d3b9a90000000000133340 XMM07=00000000000000000000000000000000 XMM08=415453454d49545f454d49544c414552 XMM09=00000000000000000000000000000000 XMM10=00000000000000000000000000000000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000 info registers vcpu 1 RAX=ffff88806cf35000 RBX=0000000000000001 RCX=ffffffff8450c50e RDX=ffffed100d9e6a01 RSI=0000000000000004 RDI=ffffffff812889a5 RBP=dffffc0000000000 RSP=ffff888008e27e70 R8 =0000000000000000 R9 =ffffed100d9e6a00 R10=ffff88806cf35003 R11=0000000000000001 R12=ffffffff85d3bed0 R13=1ffff110011c4fd3 R14=0000000000000000 R15=0000000000000000 RIP=ffffffff8450d49f 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=00007ffe29651a18 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=00007f431d1d0510000055740d055790 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