syzkaller login: [ 28.945711] BUG: Bad rss-counter state mm:000000004aff1038 type:MM_FILEPAGES val:33 [ 28.946936] BUG: Bad rss-counter state mm:000000004aff1038 type:MM_ANONPAGES val:22 [ 29.002850] ================================================================== [ 29.003807] BUG: KASAN: slab-use-after-free in vma_interval_tree_remove+0xc75/0xec0 [ 29.004739] Read of size 8 at addr ffff88800dd406b0 by task sshd/220 [ 29.005504] [ 29.005723] CPU: 0 PID: 220 Comm: sshd Not tainted 6.4.0-rc7-next-20230620 #1 [ 29.006581] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS 1.12.0-1 04/01/2014 [ 29.007569] Call Trace: [ 29.007889] [ 29.008173] dump_stack_lvl+0x91/0xf0 [ 29.008663] print_report+0xcc/0x620 [ 29.009142] ? __virt_addr_valid+0x102/0x340 [ 29.009690] ? vma_interval_tree_remove+0xc75/0xec0 [ 29.010303] ? vma_interval_tree_remove+0xc75/0xec0 [ 29.010924] kasan_report+0xbe/0xf0 [ 29.011394] ? vma_interval_tree_remove+0xc75/0xec0 [ 29.012009] vma_interval_tree_remove+0xc75/0xec0 [ 29.012600] vma_prepare+0xc54/0x11a0 [ 29.013073] __split_vma+0x5af/0x950 [ 29.013541] ? __pfx___split_vma+0x10/0x10 [ 29.014074] ? find_held_lock+0x2c/0x110 [ 29.014590] do_vmi_align_munmap+0x2ba/0x11f0 [ 29.015172] ? lock_is_held_type+0x9f/0x120 [ 29.015709] ? __pfx_do_vmi_align_munmap+0x10/0x10 [ 29.016313] ? mtree_range_walk+0x632/0x900 [ 29.016864] ? mas_walk+0x5c7/0x7c0 [ 29.017338] do_vmi_munmap+0x1f1/0x2b0 [ 29.017825] mmap_region+0x1f9/0x2660 [ 29.018307] ? vm_mmap_pgoff+0x15c/0x3a0 [ 29.018814] ? __pfx_arch_get_unmapped_area_topdown+0x10/0x10 [ 29.019542] ? __pfx_lock_acquire+0x10/0x10 [ 29.020080] ? __pfx_mmap_region+0x10/0x10 [ 29.020602] ? security_mmap_addr+0x7d/0xa0 [ 29.021129] ? get_unmapped_area+0x1f5/0x3f0 [ 29.021681] do_mmap+0x854/0xf00 [ 29.022116] vm_mmap_pgoff+0x1a6/0x3a0 [ 29.022616] ? __pfx_vm_mmap_pgoff+0x10/0x10 [ 29.023186] ksys_mmap_pgoff+0x3af/0x500 [ 29.023696] do_syscall_64+0x3f/0x90 [ 29.024171] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 29.024825] RIP: 0033:0x7f961dd3cd82 [ 29.025278] 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 [ 29.027407] RSP: 002b:00007ffdeb1dcf18 EFLAGS: 00000206 ORIG_RAX: 0000000000000009 [ 29.028310] RAX: ffffffffffffffda RBX: 0000000000000812 RCX: 00007f961dd3cd82 [ 29.029152] RDX: 0000000000000005 RSI: 0000000000001000 RDI: 00007f961d176000 [ 29.029994] RBP: 00007f961d176000 R08: 0000000000000009 R09: 0000000000001000 [ 29.030841] R10: 0000000000000812 R11: 0000000000000206 R12: 0000560a2aa8ab20 [ 29.031690] R13: 00007ffdeb1dcf30 R14: 00007ffdeb1dcf60 R15: 00007ffdeb1dd2c0 [ 29.032554] [ 29.032850] [ 29.033063] Allocated by task 213: [ 29.033490] kasan_save_stack+0x22/0x50 [ 29.034002] kasan_set_track+0x25/0x30 [ 29.034496] __kasan_slab_alloc+0x59/0x70 [ 29.035055] kmem_cache_alloc+0x16b/0x370 [ 29.035577] vm_area_dup+0x20/0x160 [ 29.036031] __split_vma+0x170/0x950 [ 29.036495] split_vma+0xc6/0x110 [ 29.036943] mprotect_fixup+0x8d2/0xb30 [ 29.037452] do_mprotect_pkey+0x87e/0xd40 [ 29.037969] __x64_sys_mprotect+0x78/0xc0 [ 29.038497] do_syscall_64+0x3f/0x90 [ 29.038976] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 29.039627] [ 29.039843] Freed by task 213: [ 29.040231] kasan_save_stack+0x22/0x50 [ 29.040730] kasan_set_track+0x25/0x30 [ 29.041220] kasan_save_free_info+0x2b/0x50 [ 29.041751] __kasan_slab_free+0x10a/0x190 [ 29.042282] kmem_cache_free+0x10d/0x4d0 [ 29.042786] rcu_core+0x8c8/0x2860 [ 29.043250] __do_softirq+0x1b7/0x7d4 [ 29.043737] [ 29.043951] Last potentially related work creation: [ 29.044536] kasan_save_stack+0x22/0x50 [ 29.045036] __kasan_record_aux_stack+0x8e/0xa0 [ 29.045614] __call_rcu_common.constprop.0+0x6a/0xb90 [ 29.046253] remove_vma+0x139/0x170 [ 29.046701] do_vmi_align_munmap+0xd4a/0x11f0 [ 29.047273] do_vmi_munmap+0x1f1/0x2b0 [ 29.047754] __vm_munmap+0x138/0x3a0 [ 29.048217] __x64_sys_munmap+0x59/0x80 [ 29.048717] do_syscall_64+0x3f/0x90 [ 29.049192] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 29.049836] [ 29.050049] The buggy address belongs to the object at ffff88800dd40658 [ 29.050049] which belongs to the cache vm_area_struct of size 168 [ 29.051521] The buggy address is located 88 bytes inside of [ 29.051521] freed 168-byte region [ffff88800dd40658, ffff88800dd40700) [ 29.052920] [ 29.053135] The buggy address belongs to the physical page: [ 29.053798] page:000000004e2c8577 refcount:1 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0xdd40 [ 29.054906] memcg:ffff88800e04ac01 [ 29.055335] anon flags: 0x100000000000200(slab|node=0|zone=1) [ 29.056029] page_type: 0xffffffff() [ 29.056481] raw: 0100000000000200 ffff8880087a0c80 0000000000000000 dead000000000001 [ 29.057397] raw: 0000000000000000 0000000000110011 00000001ffffffff ffff88800e04ac01 [ 29.058309] page dumped because: kasan: bad access detected [ 29.058975] [ 29.059189] Memory state around the buggy address: [ 29.059774] ffff88800dd40580: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb [ 29.060622] ffff88800dd40600: fb fb fb fc fc fc fc fc fc fc fc fa fb fb fb fb [ 29.061485] >ffff88800dd40680: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb [ 29.062338] ^ [ 29.062921] ffff88800dd40700: fc fc fc fc fc fc fc fc fa fb fb fb fb fb fb fb [ 29.063770] ffff88800dd40780: fb fb fb fb fb fb fb fb fb fb fb fb fb fc fc fc [ 29.064627] ================================================================== [ 29.065952] Disabling lock debugging due to kernel taint [ 30.959882] BUG: Bad rss-counter state mm:00000000e98c3616 type:MM_FILEPAGES val:33 [ 30.960605] BUG: Bad rss-counter state mm:00000000e98c3616 type:MM_ANONPAGES val:22 [ 31.343281] BUG: Bad rss-counter state mm:0000000088591099 type:MM_FILEPAGES val:33 [ 31.344284] BUG: Bad rss-counter state mm:0000000088591099 type:MM_ANONPAGES val:22 Warning: Permanently added '[localhost]:52219' (ECDSA) to the list of known hosts. 2023/06/20 23:50:48 fuzzer started 2023/06/20 23:50:48 dialing manager at localhost:36067 2023/06/20 23:50:48 checking machine... 2023/06/20 23:50:48 checking revisions... [ 32.005655] kmemleak: Automatic memory scanning thread ended 2023/06/20 23:50:49 testing simple program... [ 32.050935] cgroup: Unknown subsys name 'net' [ 32.099846] cgroup: Unknown subsys name 'rlimit' executing program executing program executing program VM DIAGNOSIS: 23:50:48 Registers: info registers vcpu 0 RAX=00007ffff920d480 RBX=000055a84138f740 RCX=0000000000000002 RDX=00007ffff920d460 RSI=00007f09ac28707e RDI=00007ffff920d5a0 RBP=0000000000000660 RSP=00007ffff920d450 R8 =000055a8413a0180 R9 =000055a84138f770 R10=0000000000000001 R11=0000000000000000 R12=000055a841379350 R13=00007f09ac287000 R14=00007ffff920d5a0 R15=0000000000000000 RIP=00007f09ac750572 RFL=00000202 [-------] CPL=3 II=0 A20=1 SMM=0 HLT=0 ES =0000 0000000000000000 00000000 00000000 CS =0033 0000000000000000 ffffffff 00a0fb00 DPL=3 CS64 [-RA] SS =002b 0000000000000000 ffffffff 00c0f300 DPL=3 DS [-WA] DS =0000 0000000000000000 00000000 00000000 FS =0000 00007f09ac2df900 00000000 00000000 GS =0000 0000000000000000 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=00007f09ac8970b0 CR3=0000000017cb0000 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=ffff000000000000ffff000000000000 XMM02=000000000000000000000000000000ff XMM03=5320444f4854454d5f54505952434e45 XMM04=40404040404040404040404040404040 XMM05=5a5a5a5a5a5a5a5a5a5a5a5a5a5a5a5a XMM06=20202020202020202020202020202020 XMM07=00000000000000000000000000000000 XMM08=7465675f6c697475646f6d6d61705f00 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=ffff888008c04400 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=00007fa7ce219b90 CR3=000000000d72a000 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=4c605b94b7b5709dcc418649deed1af9 XMM02=ec2efd57dc4c00df0000000000119e20 XMM03=6da02643d298d06f0000000000119ef0 XMM04=b6f0e273cdf2488000000000000ae988 XMM05=59d5b690e0af863b0000000000131098 XMM06=e999c26c8c442737000000000012f798 XMM07=e042d86d42eb936e0000000000120e60 XMM08=6da02643d298d06f0000000000119ef0 XMM09=00000000000000000000000000000000 XMM10=20200000000020202020202020200000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000