syzkaller login: [ 31.469264] BUG: Bad rss-counter state mm:00000000bd2eb165 type:MM_FILEPAGES val:33 [ 31.470688] BUG: Bad rss-counter state mm:00000000bd2eb165 type:MM_ANONPAGES val:22 [ 31.649450] ================================================================== [ 31.650600] BUG: KASAN: slab-use-after-free in vma_interval_tree_remove+0xc75/0xec0 [ 31.651910] Read of size 8 at addr ffff88800c9ed880 by task sshd/220 [ 31.653143] [ 31.653399] CPU: 1 PID: 220 Comm: sshd Not tainted 6.4.0-rc7-next-20230620 #1 [ 31.654416] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS 1.12.0-1 04/01/2014 [ 31.655497] Call Trace: [ 31.655802] [ 31.656092] dump_stack_lvl+0x91/0xf0 [ 31.656567] print_report+0xcc/0x620 [ 31.657055] ? __virt_addr_valid+0x102/0x340 [ 31.657584] ? vma_interval_tree_remove+0xc75/0xec0 [ 31.658207] ? vma_interval_tree_remove+0xc75/0xec0 [ 31.658796] kasan_report+0xbe/0xf0 [ 31.659287] ? vma_interval_tree_remove+0xc75/0xec0 [ 31.659903] vma_interval_tree_remove+0xc75/0xec0 [ 31.660484] vma_prepare+0xc54/0x11a0 [ 31.660942] __split_vma+0x5af/0x950 [ 31.661413] ? __pfx___split_vma+0x10/0x10 [ 31.661924] ? find_held_lock+0x2c/0x110 [ 31.662459] do_vmi_align_munmap+0x2ba/0x11f0 [ 31.663012] ? lock_is_held_type+0x9f/0x120 [ 31.663561] ? __pfx_do_vmi_align_munmap+0x10/0x10 [ 31.664167] ? mtree_range_walk+0x632/0x900 [ 31.664701] ? mas_walk+0x5c7/0x7c0 [ 31.665179] do_vmi_munmap+0x1f1/0x2b0 [ 31.665646] mmap_region+0x1f9/0x2660 [ 31.666138] ? vm_mmap_pgoff+0x15c/0x3a0 [ 31.666635] ? __pfx_arch_get_unmapped_area_topdown+0x10/0x10 [ 31.667337] ? __pfx_lock_acquire+0x10/0x10 [ 31.667866] ? __pfx_mmap_region+0x10/0x10 [ 31.668393] ? security_mmap_addr+0x7d/0xa0 [ 31.668897] ? get_unmapped_area+0x1f5/0x3f0 [ 31.669431] do_mmap+0x854/0xf00 [ 31.669855] vm_mmap_pgoff+0x1a6/0x3a0 [ 31.670375] ? __pfx_vm_mmap_pgoff+0x10/0x10 [ 31.670917] ksys_mmap_pgoff+0x3af/0x500 [ 31.671409] do_syscall_64+0x3f/0x90 [ 31.671904] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 31.672536] RIP: 0033:0x7feeb97c8d82 [ 31.672991] 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 [ 31.675075] RSP: 002b:00007ffdb46ef448 EFLAGS: 00000206 ORIG_RAX: 0000000000000009 [ 31.675963] RAX: ffffffffffffffda RBX: 0000000000000812 RCX: 00007feeb97c8d82 [ 31.676788] RDX: 0000000000000005 RSI: 0000000000001000 RDI: 00007feeb8c02000 [ 31.677615] RBP: 00007feeb8c02000 R08: 0000000000000009 R09: 0000000000001000 [ 31.678479] R10: 0000000000000812 R11: 0000000000000206 R12: 0000559674742ec0 [ 31.679326] R13: 00007ffdb46ef460 R14: 00007ffdb46ef490 R15: 00007ffdb46ef7f0 [ 31.680255] [ 31.680552] [ 31.680760] Allocated by task 213: [ 31.681212] kasan_save_stack+0x22/0x50 [ 31.681704] kasan_set_track+0x25/0x30 [ 31.682210] __kasan_slab_alloc+0x59/0x70 [ 31.682710] kmem_cache_alloc+0x16b/0x370 [ 31.683221] vm_area_dup+0x20/0x160 [ 31.683694] __split_vma+0x170/0x950 [ 31.684156] split_vma+0xc6/0x110 [ 31.684573] mprotect_fixup+0x8d2/0xb30 [ 31.685081] do_mprotect_pkey+0x87e/0xd40 [ 31.685588] __x64_sys_mprotect+0x78/0xc0 [ 31.686114] do_syscall_64+0x3f/0x90 [ 31.686583] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 31.687226] [ 31.687431] Freed by task 209: [ 31.687819] kasan_save_stack+0x22/0x50 [ 31.688327] kasan_set_track+0x25/0x30 [ 31.688798] kasan_save_free_info+0x2b/0x50 [ 31.689347] __kasan_slab_free+0x10a/0x190 [ 31.689860] kmem_cache_free+0x10d/0x4d0 [ 31.690364] rcu_core+0x8c8/0x2860 [ 31.690793] __do_softirq+0x1b7/0x7d4 [ 31.691266] [ 31.691496] Last potentially related work creation: [ 31.692073] kasan_save_stack+0x22/0x50 [ 31.692556] __kasan_record_aux_stack+0x8e/0xa0 [ 31.693134] __call_rcu_common.constprop.0+0x6a/0xb90 [ 31.693831] remove_vma+0x139/0x170 [ 31.694286] do_vmi_align_munmap+0xd4a/0x11f0 [ 31.694821] do_vmi_munmap+0x1f1/0x2b0 [ 31.695301] __vm_munmap+0x138/0x3a0 [ 31.695768] __x64_sys_munmap+0x59/0x80 [ 31.696268] do_syscall_64+0x3f/0x90 [ 31.696721] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 31.697375] [ 31.697583] The buggy address belongs to the object at ffff88800c9ed828 [ 31.697583] which belongs to the cache vm_area_struct of size 168 [ 31.699031] The buggy address is located 88 bytes inside of [ 31.699031] freed 168-byte region [ffff88800c9ed828, ffff88800c9ed8d0) [ 31.700442] [ 31.700648] The buggy address belongs to the physical page: [ 31.701311] page:00000000e36f94cc refcount:1 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0xc9ed [ 31.702375] memcg:ffff88800fc9ab01 [ 31.702782] flags: 0x100000000000200(slab|node=0|zone=1) [ 31.703413] page_type: 0xffffffff() [ 31.703855] raw: 0100000000000200 ffff8880087a0c80 dead000000000122 0000000000000000 [ 31.704753] raw: 0000000000000000 0000000000110011 00000001ffffffff ffff88800fc9ab01 [ 31.705641] page dumped because: kasan: bad access detected [ 31.706294] [ 31.706514] Memory state around the buggy address: [ 31.707091] ffff88800c9ed780: 00 00 00 00 00 00 00 00 00 00 00 00 00 fc fc fc [ 31.707955] ffff88800c9ed800: fc fc fc fc fc fa fb fb fb fb fb fb fb fb fb fb [ 31.708809] >ffff88800c9ed880: fb fb fb fb fb fb fb fb fb fb fc fc fc fc fc fc [ 31.709661] ^ [ 31.710067] ffff88800c9ed900: fc fc fa fb fb fb fb fb fb fb fb fb fb fb fb fb [ 31.710916] ffff88800c9ed980: fb fb fb fb fb fb fb fc fc fc fc fc fc fc fc 00 [ 31.711776] ================================================================== [ 31.712691] Disabling lock debugging due to kernel taint [ 33.649191] BUG: Bad rss-counter state mm:0000000028484d8b type:MM_FILEPAGES val:33 [ 33.650183] BUG: Bad rss-counter state mm:0000000028484d8b type:MM_ANONPAGES val:22 [ 34.185673] BUG: Bad rss-counter state mm:00000000a18d4c5b type:MM_FILEPAGES val:33 [ 34.186825] BUG: Bad rss-counter state mm:00000000a18d4c5b type:MM_ANONPAGES val:22 Warning: Permanently added '[localhost]:37164' (ECDSA) to the list of known hosts. 2023/06/20 23:19:19 fuzzer started 2023/06/20 23:19:19 dialing manager at localhost:36067 2023/06/20 23:19:19 checking machine... 2023/06/20 23:19:19 checking revisions... [ 34.860370] kmemleak: Automatic memory scanning thread ended 2023/06/20 23:19:19 testing simple program... [ 34.914647] cgroup: Unknown subsys name 'net' [ 34.984029] cgroup: Unknown subsys name 'rlimit' executing program executing program executing program VM DIAGNOSIS: 23:19:18 Registers: info registers vcpu 0 RAX=ffffffff8180c705 RBX=0000000000000001 RCX=0000000000000001 RDX=ffff88800fdb7d01 RSI=ffff88800fdb7d20 RDI=ffff88800fdb7d20 RBP=ffff88800fdb7a30 RSP=ffff88800fdb7968 R8 =ffffffff86138e90 R9 =ffff88800fdb7a18 R10=0000000000038001 R11=0000000000020d8f R12=ffff88800fdb7a38 R13=ffff88800fdb7a20 R14=ffff88800fdb7d28 R15=ffff88800fdb79d8 RIP=ffffffff81131041 RFL=00000202 [-------] 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 =0000 0000000000000000 00000000 00000000 DS =0000 0000000000000000 00000000 00000000 FS =0000 00007fe8d4b35900 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=00007fff7876d000 CR3=000000000daa8000 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=2c2c2c2c2c2c2c2c2c2c2c2c2c2c2c2c XMM01=00ff00000000000000000000000000ff XMM02=00ff00000000000000000000000000ff XMM03=655f6d61702c7374696d696c5f6d6170 XMM04=3d6c616e696d72657420322e322e302e XMM05=3d656d616e74736f682022646873732f XMM06=746f6f72223d746363612078756e696c XMM07=6e655f6d61702c7374696d696c5f6d61 XMM08=6500273d2720676e6974636570786500 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=00007f308ba2c7c0 CR3=0000000009a6a000 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=4e4274a8098d7d9181400edd5bb0fe40 XMM02=000000000011d0d0ec2efd57dc4c00df XMM03=0000000000121798ad4368ca56bc99c8 XMM04=424eaa638080c6e500000000000ae988 XMM05=19e9129bd510f23500000000001315f0 XMM06=0ae2109f5e5e13a40000000000130458 XMM07=e042d86d42eb936e0000000000121a18 XMM08=ad4368ca56bc99c8000000000011d130 XMM09=00000000000000000000000000000000 XMM10=20200000000020202020202020200000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000