syzkaller login: [ 31.189303] BUG: Bad rss-counter state mm:000000009e50446c type:MM_FILEPAGES val:33 [ 31.190588] BUG: Bad rss-counter state mm:000000009e50446c type:MM_ANONPAGES val:22 [ 31.339471] ================================================================== [ 31.340395] BUG: KASAN: slab-use-after-free in vma_interval_tree_remove+0xc75/0xec0 [ 31.341337] Read of size 8 at addr ffff88800dad4798 by task sshd/218 [ 31.342129] [ 31.342354] CPU: 0 PID: 218 Comm: sshd Not tainted 6.4.0-rc7-next-20230620 #1 [ 31.343332] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS 1.12.0-1 04/01/2014 [ 31.344355] Call Trace: [ 31.344683] [ 31.344997] dump_stack_lvl+0x91/0xf0 [ 31.345510] print_report+0xcc/0x620 [ 31.346013] ? __virt_addr_valid+0x102/0x340 [ 31.346596] ? vma_interval_tree_remove+0xc75/0xec0 [ 31.347231] ? vma_interval_tree_remove+0xc75/0xec0 [ 31.347870] kasan_report+0xbe/0xf0 [ 31.348343] ? vma_interval_tree_remove+0xc75/0xec0 [ 31.348967] vma_interval_tree_remove+0xc75/0xec0 [ 31.349578] vma_prepare+0xc54/0x11a0 [ 31.350067] __split_vma+0x5af/0x950 [ 31.350541] ? __pfx___split_vma+0x10/0x10 [ 31.351071] ? find_held_lock+0x2c/0x110 [ 31.351602] do_vmi_align_munmap+0x2ba/0x11f0 [ 31.352176] ? lock_is_held_type+0x9f/0x120 [ 31.352726] ? __pfx_do_vmi_align_munmap+0x10/0x10 [ 31.353368] ? mtree_range_walk+0x632/0x900 [ 31.353921] ? mas_walk+0x5c7/0x7c0 [ 31.354412] do_vmi_munmap+0x1f1/0x2b0 [ 31.354906] mmap_region+0x1f9/0x2660 [ 31.355390] ? vm_mmap_pgoff+0x15c/0x3a0 [ 31.355908] ? __pfx_arch_get_unmapped_area_topdown+0x10/0x10 [ 31.356617] ? __pfx_lock_acquire+0x10/0x10 [ 31.357178] ? __pfx_mmap_region+0x10/0x10 [ 31.357721] ? security_mmap_addr+0x7d/0xa0 [ 31.358267] ? get_unmapped_area+0x1f5/0x3f0 [ 31.358826] do_mmap+0x854/0xf00 [ 31.359272] vm_mmap_pgoff+0x1a6/0x3a0 [ 31.359767] ? __pfx_vm_mmap_pgoff+0x10/0x10 [ 31.360336] ksys_mmap_pgoff+0x3af/0x500 [ 31.360850] do_syscall_64+0x3f/0x90 [ 31.361335] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 31.361983] RIP: 0033:0x7fec2aa84d82 [ 31.362452] 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 [ 31.364591] RSP: 002b:00007ffd941931b8 EFLAGS: 00000206 ORIG_RAX: 0000000000000009 [ 31.365507] RAX: ffffffffffffffda RBX: 0000000000000812 RCX: 00007fec2aa84d82 [ 31.366394] RDX: 0000000000000005 RSI: 0000000000001000 RDI: 00007fec29ebe000 [ 31.367250] RBP: 00007fec29ebe000 R08: 0000000000000009 R09: 0000000000001000 [ 31.368104] R10: 0000000000000812 R11: 0000000000000206 R12: 00005609526eaf70 [ 31.368959] R13: 00007ffd941931d0 R14: 00007ffd94193200 R15: 00007ffd94193560 [ 31.369827] [ 31.370132] [ 31.370349] Allocated by task 211: [ 31.370778] kasan_save_stack+0x22/0x50 [ 31.371286] kasan_set_track+0x25/0x30 [ 31.371782] __kasan_slab_alloc+0x59/0x70 [ 31.372319] kmem_cache_alloc+0x16b/0x370 [ 31.372836] vm_area_dup+0x20/0x160 [ 31.373295] __split_vma+0x170/0x950 [ 31.373764] split_vma+0xc6/0x110 [ 31.374215] mprotect_fixup+0x8d2/0xb30 [ 31.374724] do_mprotect_pkey+0x87e/0xd40 [ 31.375257] __x64_sys_mprotect+0x78/0xc0 [ 31.375780] do_syscall_64+0x3f/0x90 [ 31.376258] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 31.376916] [ 31.377139] Freed by task 211: [ 31.377531] kasan_save_stack+0x22/0x50 [ 31.378036] kasan_set_track+0x25/0x30 [ 31.378554] kasan_save_free_info+0x2b/0x50 [ 31.379091] __kasan_slab_free+0x10a/0x190 [ 31.379628] kmem_cache_free+0x10d/0x4d0 [ 31.380142] rcu_core+0x8c8/0x2860 [ 31.380588] __do_softirq+0x1b7/0x7d4 [ 31.381076] [ 31.381300] Last potentially related work creation: [ 31.381891] kasan_save_stack+0x22/0x50 [ 31.382408] __kasan_record_aux_stack+0x8e/0xa0 [ 31.382987] __call_rcu_common.constprop.0+0x6a/0xb90 [ 31.383631] remove_vma+0x139/0x170 [ 31.384080] do_vmi_align_munmap+0xd4a/0x11f0 [ 31.384648] do_vmi_munmap+0x1f1/0x2b0 [ 31.385136] __vm_munmap+0x138/0x3a0 [ 31.385610] __x64_sys_munmap+0x59/0x80 [ 31.386116] do_syscall_64+0x3f/0x90 [ 31.386593] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 31.387246] [ 31.387467] Second to last potentially related work creation: [ 31.388160] kasan_save_stack+0x22/0x50 [ 31.388666] __kasan_record_aux_stack+0x8e/0xa0 [ 31.389237] __call_rcu_common.constprop.0+0x6a/0xb90 [ 31.389882] remove_vma+0x139/0x170 [ 31.390351] do_vmi_align_munmap+0xd4a/0x11f0 [ 31.390912] do_vmi_munmap+0x1f1/0x2b0 [ 31.391405] mmap_region+0x1f9/0x2660 [ 31.391885] do_mmap+0x854/0xf00 [ 31.392323] vm_mmap_pgoff+0x1a6/0x3a0 [ 31.392812] ksys_mmap_pgoff+0x3af/0x500 [ 31.393316] do_syscall_64+0x3f/0x90 [ 31.393796] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 31.394466] [ 31.394682] The buggy address belongs to the object at ffff88800dad4740 [ 31.394682] which belongs to the cache vm_area_struct of size 168 [ 31.396165] The buggy address is located 88 bytes inside of [ 31.396165] freed 168-byte region [ffff88800dad4740, ffff88800dad47e8) [ 31.397574] [ 31.397791] The buggy address belongs to the physical page: [ 31.398481] page:00000000a32a2505 refcount:1 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0xdad4 [ 31.399583] memcg:ffff88800eef9801 [ 31.400009] flags: 0x100000000000200(slab|node=0|zone=1) [ 31.400663] page_type: 0xffffffff() [ 31.401113] raw: 0100000000000200 ffff8880087a0c80 dead000000000100 dead000000000122 [ 31.402050] raw: 0000000000000000 0000000000110011 00000001ffffffff ffff88800eef9801 [ 31.402981] page dumped because: kasan: bad access detected [ 31.403648] [ 31.403865] Memory state around the buggy address: [ 31.404446] ffff88800dad4680: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 [ 31.405304] ffff88800dad4700: fc fc fc fc fc fc fc fc fa fb fb fb fb fb fb fb [ 31.406181] >ffff88800dad4780: fb fb fb fb fb fb fb fb fb fb fb fb fb fc fc fc [ 31.407043] ^ [ 31.407537] ffff88800dad4800: fc fc fc fc fc fa fb fb fb fb fb fb fb fb fb fb [ 31.408402] ffff88800dad4880: fb fb fb fb fb fb fb fb fb fb fc fc fc fc fc fc [ 31.409262] ================================================================== [ 31.410244] Disabling lock debugging due to kernel taint [ 33.424642] BUG: Bad rss-counter state mm:00000000e277a659 type:MM_FILEPAGES val:33 [ 33.425680] BUG: Bad rss-counter state mm:00000000e277a659 type:MM_ANONPAGES val:22 [ 33.921707] BUG: Bad rss-counter state mm:00000000130f02fa type:MM_FILEPAGES val:33 [ 33.922973] BUG: Bad rss-counter state mm:00000000130f02fa type:MM_ANONPAGES val:22 Warning: Permanently added '[localhost]:46797' (ECDSA) to the list of known hosts. 2023/06/20 17:55:13 fuzzer started 2023/06/20 17:55:13 dialing manager at localhost:36067 2023/06/20 17:55:13 checking machine... 2023/06/20 17:55:13 checking revisions... [ 34.643989] kmemleak: Automatic memory scanning thread ended 2023/06/20 17:55:13 testing simple program... [ 34.696427] cgroup: Unknown subsys name 'net' [ 34.741826] cgroup: Unknown subsys name 'rlimit' executing program executing program executing program VM DIAGNOSIS: 17:55:13 Registers: info registers vcpu 0 RAX=0000000000023906 RBX=0000000000000001 RCX=ffffffff818ad749 RDX=0000000000023906 RSI=0000000000008ad7 RDI=ffffffff8650c550 RBP=ffff888014767728 RSP=ffff888014767660 R8 =0000000000000000 R9 =ffff888014767710 R10=0000000000038001 R11=0000000000023906 R12=ffff888014767730 R13=ffff888014767718 R14=ffff888014767711 R15=ffff8880147676d0 RIP=ffffffff81130837 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 00007f7dd4b97900 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=00007f7dd3f83aa0 CR3=000000000d88e000 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=f81f2d395a9efc0c00000000000ae988 XMM05=7d8d25c882caf5360000000000133b38 XMM06=751b9502027dc0b90000000000132660 XMM07=00000000000000000000000000000000 XMM08=415453454d49545f454d49544c414552 XMM09=00000000000000000000000000000000 XMM10=20200000000020202020202020200000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000 info registers vcpu 1 RAX=dffffc0000000000 RBX=ffff88800f110000 RCX=0000000000000000 RDX=0000000000000000 RSI=0000000000000001 RDI=ffff88800f1103f4 RBP=0000000000000001 RSP=ffff88806cf09d88 R8 =0000000000000000 R9 =fffffbfff0ba7a6a R10=ffffffff85d3d357 R11=00000000000b6a61 R12=0000000000000548 R13=ffffffff87b6a200 R14=ffff88800b85f500 R15=ffff88806cf361e0 RIP=ffffffff8135bd6b RFL=00000017 [----APC] 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 00007f58c2e27900 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=00007ffec6d8b000 CR3=000000000eb26000 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=74696d7265705f6d61703d73726f746e XMM02=000000000000000000000000000000ff XMM03=5320444f4854454d5f54505952434e45 XMM04=40404040404040404040404040404040 XMM05=5a5a5a5a5a5a5a5a5a5a5a5a5a5a5a5a XMM06=20202020202020202020202020202020 XMM07=00000000000000000000000000000000 XMM08=61662029286e65706f5f746964756100 XMM09=00000000000000000000000000000000 XMM10=00000000000000000000000000000000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000