syzkaller login: [ 30.858464] BUG: Bad rss-counter state mm:00000000a7cb15de type:MM_FILEPAGES val:33 [ 30.859799] BUG: Bad rss-counter state mm:00000000a7cb15de type:MM_ANONPAGES val:22 [ 31.014300] ================================================================== [ 31.015315] BUG: KASAN: slab-use-after-free in vma_interval_tree_remove+0xc75/0xec0 [ 31.016387] Read of size 8 at addr ffff88801803a5c8 by task sshd/221 [ 31.017244] [ 31.017485] CPU: 0 PID: 221 Comm: sshd Not tainted 6.4.0-rc7-next-20230620 #1 [ 31.018511] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS 1.12.0-1 04/01/2014 [ 31.019603] Call Trace: [ 31.019975] <TASK> [ 31.020294] dump_stack_lvl+0x91/0xf0 [ 31.020845] print_report+0xcc/0x620 [ 31.021379] ? __virt_addr_valid+0x102/0x340 [ 31.021990] ? vma_interval_tree_remove+0xc75/0xec0 [ 31.022677] ? vma_interval_tree_remove+0xc75/0xec0 [ 31.023366] kasan_report+0xbe/0xf0 [ 31.023929] ? vma_interval_tree_remove+0xc75/0xec0 [ 31.024616] vma_interval_tree_remove+0xc75/0xec0 [ 31.025286] vma_prepare+0xc54/0x11a0 [ 31.025816] __split_vma+0x5af/0x950 [ 31.026339] ? __pfx___split_vma+0x10/0x10 [ 31.026926] ? find_held_lock+0x2c/0x110 [ 31.027503] do_vmi_align_munmap+0x2ba/0x11f0 [ 31.028138] ? lock_is_held_type+0x9f/0x120 [ 31.028733] ? __pfx_do_vmi_align_munmap+0x10/0x10 [ 31.029407] ? mtree_range_walk+0x632/0x900 [ 31.030019] ? mas_walk+0x5c7/0x7c0 [ 31.030549] do_vmi_munmap+0x1f1/0x2b0 [ 31.031098] mmap_region+0x1f9/0x2660 [ 31.031635] ? vm_mmap_pgoff+0x15c/0x3a0 [ 31.032173] ? __pfx_arch_get_unmapped_area_topdown+0x10/0x10 [ 31.032891] ? __pfx_lock_acquire+0x10/0x10 [ 31.033425] ? __pfx_mmap_region+0x10/0x10 [ 31.033961] ? security_mmap_addr+0x7d/0xa0 [ 31.034493] ? get_unmapped_area+0x1f5/0x3f0 [ 31.035051] do_mmap+0x854/0xf00 [ 31.035494] vm_mmap_pgoff+0x1a6/0x3a0 [ 31.036018] ? __pfx_vm_mmap_pgoff+0x10/0x10 [ 31.036599] ksys_mmap_pgoff+0x3af/0x500 [ 31.037130] do_syscall_64+0x3f/0x90 [ 31.037616] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 31.038290] RIP: 0033:0x7f191de79d82 [ 31.038756] 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 [ 31.040959] RSP: 002b:00007ffd27677428 EFLAGS: 00000206 ORIG_RAX: 0000000000000009 [ 31.041886] RAX: ffffffffffffffda RBX: 0000000000000812 RCX: 00007f191de79d82 [ 31.042767] RDX: 0000000000000005 RSI: 0000000000001000 RDI: 00007f191d2b3000 [ 31.043641] RBP: 00007f191d2b3000 R08: 0000000000000009 R09: 0000000000001000 [ 31.044519] R10: 0000000000000812 R11: 0000000000000206 R12: 0000557f46dcfec0 [ 31.045390] R13: 00007ffd27677440 R14: 00007ffd27677470 R15: 00007ffd276777d0 [ 31.046284] </TASK> [ 31.046592] [ 31.046822] Allocated by task 214: [ 31.047266] kasan_save_stack+0x22/0x50 [ 31.047788] kasan_set_track+0x25/0x30 [ 31.048384] __kasan_slab_alloc+0x59/0x70 [ 31.048940] kmem_cache_alloc+0x16b/0x370 [ 31.049503] vm_area_dup+0x20/0x160 [ 31.049991] __split_vma+0x170/0x950 [ 31.050514] split_vma+0xc6/0x110 [ 31.050975] mprotect_fixup+0x8d2/0xb30 [ 31.051526] do_mprotect_pkey+0x87e/0xd40 [ 31.052084] __x64_sys_mprotect+0x78/0xc0 [ 31.052672] do_syscall_64+0x3f/0x90 [ 31.053176] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 31.053886] [ 31.054112] Freed by task 214: [ 31.054545] kasan_save_stack+0x22/0x50 [ 31.055072] kasan_set_track+0x25/0x30 [ 31.055606] kasan_save_free_info+0x2b/0x50 [ 31.056189] __kasan_slab_free+0x10a/0x190 [ 31.056776] kmem_cache_free+0x10d/0x4d0 [ 31.057328] rcu_core+0x8c8/0x2860 [ 31.057819] __do_softirq+0x1b7/0x7d4 [ 31.058325] [ 31.058566] Last potentially related work creation: [ 31.059187] kasan_save_stack+0x22/0x50 [ 31.059746] __kasan_record_aux_stack+0x8e/0xa0 [ 31.060378] __call_rcu_common.constprop.0+0x6a/0xb90 [ 31.061071] remove_vma+0x139/0x170 [ 31.061577] do_vmi_align_munmap+0xd4a/0x11f0 [ 31.062172] do_vmi_munmap+0x1f1/0x2b0 [ 31.062724] __vm_munmap+0x138/0x3a0 [ 31.063221] __x64_sys_munmap+0x59/0x80 [ 31.063765] do_syscall_64+0x3f/0x90 [ 31.064293] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 31.064988] [ 31.065219] The buggy address belongs to the object at ffff88801803a570 [ 31.065219] which belongs to the cache vm_area_struct of size 168 [ 31.066810] The buggy address is located 88 bytes inside of [ 31.066810] freed 168-byte region [ffff88801803a570, ffff88801803a618) [ 31.068431] [ 31.068660] The buggy address belongs to the physical page: [ 31.069370] page:00000000349c59b2 refcount:1 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0x1803a [ 31.070546] memcg:ffff88801a1dbd01 [ 31.070997] flags: 0x100000000000200(slab|node=0|zone=1) [ 31.071696] page_type: 0xffffffff() [ 31.072193] raw: 0100000000000200 ffff8880087a0c80 dead000000000122 0000000000000000 [ 31.073213] raw: 0000000000000000 0000000000110011 00000001ffffffff ffff88801a1dbd01 [ 31.074201] page dumped because: kasan: bad access detected [ 31.074923] [ 31.075152] Memory state around the buggy address: [ 31.075812] ffff88801803a480: fc 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 [ 31.076736] ffff88801803a500: 00 00 00 00 00 00 fc fc fc fc fc fc fc fc fa fb [ 31.077672] >ffff88801803a580: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb [ 31.078588] ^ [ 31.079283] ffff88801803a600: fb fb fb fc fc fc fc fc fc fc fc fa fb fb fb fb [ 31.080220] ffff88801803a680: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb [ 31.081151] ================================================================== [ 31.082418] Disabling lock debugging due to kernel taint [ 33.029363] BUG: Bad rss-counter state mm:00000000d9915aa8 type:MM_FILEPAGES val:33 [ 33.030634] BUG: Bad rss-counter state mm:00000000d9915aa8 type:MM_ANONPAGES val:22 [ 33.509620] BUG: Bad rss-counter state mm:0000000031f80feb type:MM_FILEPAGES val:33 [ 33.510621] BUG: Bad rss-counter state mm:0000000031f80feb type:MM_ANONPAGES val:22 Warning: Permanently added '[localhost]:17144' (ECDSA) to the list of known hosts. 2023/06/21 02:04:00 fuzzer started 2023/06/21 02:04:01 dialing manager at localhost:36067 2023/06/21 02:04:01 checking machine... 2023/06/21 02:04:01 checking revisions... [ 34.224935] kmemleak: Automatic memory scanning thread ended 2023/06/21 02:04:01 testing simple program... [ 34.275030] cgroup: Unknown subsys name 'net' [ 34.340210] cgroup: Unknown subsys name 'rlimit' executing program executing program executing program VM DIAGNOSIS: 02:04:00 Registers: info registers vcpu 0 RAX=0000000000000000 RBX=ffff888019aa8b80 RCX=0000000000000000 RDX=ffff888016dd9b40 RSI=ffffffff83631eb7 RDI=ffff888019aa8d20 RBP=ffff888019aa8d20 RSP=ffff88800909fd90 R8 =0000000000000005 R9 =0000000000000000 R10=0000000000000000 R11=00000000000b6a61 R12=ffffffff84da44a0 R13=ffff888019aa8ba0 R14=0000000000000000 R15=ffff888019aa8c40 RIP=ffffffff8452c8c6 RFL=00000282 [--S----] 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 00007f8dd550b900 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=000055d72c21c768 CR3=000000000e81c000 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=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 info registers vcpu 1 RAX=dffffc0000000000 RBX=ffff888010073680 RCX=0000000000000000 RDX=1ffff11002d9db04 RSI=0000000000000008 RDI=ffff888016ced820 RBP=ffff888016ced800 RSP=ffff8880142ef690 R8 =0000000000000000 R9 =fffffbfff0ba7a6a R10=ffffffff85d3d357 R11=0000000000000001 R12=0000000000000000 R13=00000000ffffffff R14=0000000000400cc0 R15=ffffffff8366a63c RIP=ffffffff8182499d 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 00007f1ab38dc900 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=00007f1ab2dfa000 CR3=000000000daee000 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=756f6a2f646d65747379732f6e75722f XMM01=00676f6c7379732f6c616e72756f6a2f XMM02=756f6a2f646d65747379732f6e75722f XMM03=006c616e72756f6a2f646d6574737973 XMM04=d4218ddb73db572500000000000ae988 XMM05=24e095472ce080060000000000132ea0 XMM06=89c3aefece398d2f0000000000131c40 XMM07=fb795ef6d65770560000000000121e90 XMM08=4f5453444600273d67736d000d0a0920 XMM09=00000000000000000000000000000000 XMM10=20200000000020202020202020200000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000