syzkaller login: [ 37.787628] BUG: Bad rss-counter state mm:00000000d1afabb3 type:MM_FILEPAGES val:33 [ 37.788880] BUG: Bad rss-counter state mm:00000000d1afabb3 type:MM_ANONPAGES val:22 [ 37.940616] ================================================================== [ 37.941535] BUG: KASAN: slab-use-after-free in vma_interval_tree_remove+0xc75/0xec0 [ 37.942540] Read of size 8 at addr ffff88801673d5c8 by task sshd/220 [ 37.943332] [ 37.943555] CPU: 1 PID: 220 Comm: sshd Not tainted 6.4.0-rc7-next-20230619 #1 [ 37.944604] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS 1.12.0-1 04/01/2014 [ 37.945601] Call Trace: [ 37.945926] [ 37.946212] dump_stack_lvl+0x91/0xf0 [ 37.946752] print_report+0xcc/0x620 [ 37.947254] ? __virt_addr_valid+0x102/0x340 [ 37.947818] ? vma_interval_tree_remove+0xc75/0xec0 [ 37.948487] ? vma_interval_tree_remove+0xc75/0xec0 [ 37.949115] kasan_report+0xbe/0xf0 [ 37.949622] ? vma_interval_tree_remove+0xc75/0xec0 [ 37.950256] vma_interval_tree_remove+0xc75/0xec0 [ 37.950890] vma_prepare+0xc54/0x11a0 [ 37.951395] __split_vma+0x5af/0x950 [ 37.951879] ? __pfx___split_vma+0x10/0x10 [ 37.952444] ? find_held_lock+0x2c/0x110 [ 37.952973] do_vmi_align_munmap+0x2ba/0x11f0 [ 37.953558] ? lock_is_held_type+0x9f/0x120 [ 37.954101] ? __pfx_do_vmi_align_munmap+0x10/0x10 [ 37.954738] ? mtree_range_walk+0x632/0x900 [ 37.955320] ? mas_walk+0x5c7/0x7c0 [ 37.955809] do_vmi_munmap+0x1f1/0x2b0 [ 37.956335] mmap_region+0x1f9/0x2660 [ 37.956825] ? vm_mmap_pgoff+0x15c/0x3a0 [ 37.957361] ? __pfx_arch_get_unmapped_area_topdown+0x10/0x10 [ 37.958083] ? __pfx_lock_acquire+0x10/0x10 [ 37.958648] ? __pfx_mmap_region+0x10/0x10 [ 37.959188] ? security_mmap_addr+0x7d/0xa0 [ 37.959746] ? get_unmapped_area+0x1f5/0x3f0 [ 37.960335] do_mmap+0x854/0xf00 [ 37.960779] vm_mmap_pgoff+0x1a6/0x3a0 [ 37.961292] ? __pfx_vm_mmap_pgoff+0x10/0x10 [ 37.961865] ksys_mmap_pgoff+0x3af/0x500 [ 37.962413] do_syscall_64+0x3f/0x90 [ 37.962908] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 37.963573] RIP: 0033:0x7f643b1cfd82 [ 37.964042] 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 [ 37.966201] RSP: 002b:00007ffc95dd8468 EFLAGS: 00000206 ORIG_RAX: 0000000000000009 [ 37.967138] RAX: ffffffffffffffda RBX: 0000000000000812 RCX: 00007f643b1cfd82 [ 37.968000] RDX: 0000000000000005 RSI: 0000000000001000 RDI: 00007f643a609000 [ 37.968892] RBP: 00007f643a609000 R08: 0000000000000009 R09: 0000000000001000 [ 37.969779] R10: 0000000000000812 R11: 0000000000000206 R12: 000055bc7aca5d90 [ 37.970675] R13: 00007ffc95dd8480 R14: 00007ffc95dd84b0 R15: 00007ffc95dd8810 [ 37.971569] [ 37.971871] [ 37.972098] Allocated by task 213: [ 37.972549] kasan_save_stack+0x22/0x50 [ 37.973206] kasan_set_track+0x25/0x30 [ 37.973869] __kasan_slab_alloc+0x59/0x70 [ 37.974568] kmem_cache_alloc+0x16b/0x370 [ 37.975263] vm_area_dup+0x20/0x160 [ 37.975833] __split_vma+0x170/0x950 [ 37.976353] split_vma+0xc6/0x110 [ 37.976808] mprotect_fixup+0x8d2/0xb30 [ 37.977340] do_mprotect_pkey+0x87e/0xd40 [ 37.977861] __x64_sys_mprotect+0x78/0xc0 [ 37.978398] do_syscall_64+0x3f/0x90 [ 37.978869] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 37.979547] [ 37.979766] Freed by task 213: [ 37.980180] kasan_save_stack+0x22/0x50 [ 37.980707] kasan_set_track+0x25/0x30 [ 37.981209] kasan_save_free_info+0x2b/0x50 [ 37.981761] __kasan_slab_free+0x10a/0x190 [ 37.982311] kmem_cache_free+0x10d/0x4d0 [ 37.982832] rcu_core+0x8c8/0x2860 [ 37.983298] __do_softirq+0x1b7/0x7d4 [ 37.983781] [ 37.984000] Last potentially related work creation: [ 37.984622] kasan_save_stack+0x22/0x50 [ 37.985130] __kasan_record_aux_stack+0x8e/0xa0 [ 37.985783] __call_rcu_common.constprop.0+0x6a/0xb90 [ 37.986447] remove_vma+0x139/0x170 [ 37.986895] do_vmi_align_munmap+0xd4a/0x11f0 [ 37.987485] do_vmi_munmap+0x1f1/0x2b0 [ 37.987974] __vm_munmap+0x138/0x3a0 [ 37.988487] __x64_sys_munmap+0x59/0x80 [ 37.988987] do_syscall_64+0x3f/0x90 [ 37.989476] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 37.990127] [ 37.990355] Second to last potentially related work creation: [ 37.991046] kasan_save_stack+0x22/0x50 [ 37.991578] __kasan_record_aux_stack+0x8e/0xa0 [ 37.992173] __call_rcu_common.constprop.0+0x6a/0xb90 [ 37.992827] remove_vma+0x139/0x170 [ 37.993301] do_vmi_align_munmap+0xd4a/0x11f0 [ 37.993874] do_vmi_munmap+0x1f1/0x2b0 [ 37.994375] mmap_region+0x1f9/0x2660 [ 37.994859] do_mmap+0x854/0xf00 [ 37.995321] vm_mmap_pgoff+0x1a6/0x3a0 [ 37.995826] ksys_mmap_pgoff+0x3af/0x500 [ 37.996376] do_syscall_64+0x3f/0x90 [ 37.996859] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 37.997581] [ 37.997799] The buggy address belongs to the object at ffff88801673d570 [ 37.997799] which belongs to the cache vm_area_struct of size 168 [ 37.999300] The buggy address is located 88 bytes inside of [ 37.999300] freed 168-byte region [ffff88801673d570, ffff88801673d618) [ 38.000740] [ 38.000961] The buggy address belongs to the physical page: [ 38.001639] page:00000000cd40adc3 refcount:1 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0x1673d [ 38.002766] memcg:ffff8880181a9801 [ 38.003193] anon flags: 0x100000000000200(slab|node=0|zone=1) [ 38.003899] page_type: 0xffffffff() [ 38.004393] raw: 0100000000000200 ffff88800879fc80 ffffea0000667a80 dead000000000005 [ 38.005325] raw: 0000000000000000 0000000000110011 00000001ffffffff ffff8880181a9801 [ 38.006232] page dumped because: kasan: bad access detected [ 38.006911] [ 38.007132] Memory state around the buggy address: [ 38.007731] ffff88801673d480: fc fa fb fb fb fb fb fb fb fb fb fb fb fb fb fb [ 38.008620] ffff88801673d500: fb fb fb fb fb fb fc fc fc fc fc fc fc fc fa fb [ 38.009495] >ffff88801673d580: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb [ 38.010382] ^ [ 38.011044] ffff88801673d600: fb fb fb fc fc fc fc fc fc fc fc fa fb fb fb fb [ 38.011916] ffff88801673d680: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb [ 38.012812] ================================================================== [ 38.013863] Disabling lock debugging due to kernel taint [ 40.432474] BUG: Bad rss-counter state mm:00000000ff8e3b4b type:MM_FILEPAGES val:33 [ 40.434029] BUG: Bad rss-counter state mm:00000000ff8e3b4b type:MM_ANONPAGES val:22 [ 40.981606] BUG: Bad rss-counter state mm:0000000033a3ac1c type:MM_FILEPAGES val:33 [ 40.982763] BUG: Bad rss-counter state mm:0000000033a3ac1c type:MM_ANONPAGES val:22 Warning: Permanently added '[localhost]:32144' (ECDSA) to the list of known hosts. 2023/06/19 19:57:46 fuzzer started 2023/06/19 19:57:46 dialing manager at localhost:44161 2023/06/19 19:57:46 checking machine... 2023/06/19 19:57:46 checking revisions... [ 41.579498] kmemleak: Automatic memory scanning thread ended 2023/06/19 19:57:47 testing simple program... [ 41.621257] cgroup: Unknown subsys name 'net' [ 41.660416] cgroup: Unknown subsys name 'rlimit' executing program executing program executing program VM DIAGNOSIS: 19:57:39 Registers: info registers vcpu 0 RAX=0000000000000000 RBX=ffff88801a09be40 RCX=ffff88800844f780 RDX=ffffea00006826c0 RSI=ffff88801a09bbe0 RDI=ffff88800844f780 RBP=0000000000000000 RSP=ffff888016947c98 R8 =ffff88801a09bab0 R9 =0000000000000000 R10=ffffea00006826c0 R11=00000000800d0006 R12=dffffc0000000000 R13=ffff888016947cd8 R14=ffff88800844f780 R15=ffff88801a09bbe0 RIP=ffffffff81810196 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 =0018 0000000000000000 ffffffff 00c09300 DPL=0 DS [-WA] DS =0000 0000000000000000 00000000 00000000 FS =0000 00007f8dfb76f900 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=00007f8dfbd24650 CR3=000000000e9f2000 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=000000000000000000000000000000ff XMM02=000000000000000000000000000000ff XMM03=5320444f4854454d5f54505952434e45 XMM04=40404040404040404040404040404040 XMM05=5a5a5a5a5a5a5a5a5a5a5a5a5a5a5a5a XMM06=20202020202020202020202020202020 XMM07=00000000000000000000000000000000 XMM08=ffbc64ffffbc44ffffbc34ffffbc9f00 XMM09=00000000000000000000000000000000 XMM10=00000000000000000000000000000000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000 info registers vcpu 1 RAX=1ffff11001aed18b RBX=0000000000000050 RCX=dffffc0000000000 RDX=ffff88801467b680 RSI=ffffffff8449effb RDI=ffff88800d768c58 RBP=ffff88800d768c08 RSP=ffff88801472fce8 R8 =0000000000000000 R9 =000000000000000a R10=000000000000000d R11=0000000000000000 R12=000000000000000a R13=000000000000000d R14=00007fdc2e1f4590 R15=00007fdc2d975fff RIP=ffffffff8449f015 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 =0000 0000000000000000 00000000 00000000 DS =0000 0000000000000000 00000000 00000000 FS =0000 00007fdc2ed8b900 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=00007fdc2e1f4590 CR3=0000000008db6000 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=454d49544c4145525f454352554f535f XMM01=3d504d415453454d49545f454d49544c XMM02=ffffffffffffffffffffffffffffffff XMM03=2f6c616e72756f6a2f676f6c2f6e7572 XMM04=473aeda9a1bb289200000000000ae988 XMM05=e1d83bfbc0b9c5840000000000136608 XMM06=82760a7069a51fd000000000001353a8 XMM07=00000000000000000000000000000000 XMM08=415453454d49545f454d49544c414552 XMM09=00000000000000000000000000000000 XMM10=20200000000020202020202020200000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000