syzkaller login: [ 30.623995] sshd (213) used greatest stack depth: 24128 bytes left [ 30.625818] BUG: Bad rss-counter state mm:0000000072cc8c2f type:MM_FILEPAGES val:33 [ 30.627404] BUG: Bad rss-counter state mm:0000000072cc8c2f type:MM_ANONPAGES val:22 [ 30.779669] ================================================================== [ 30.780592] BUG: KASAN: slab-use-after-free in vma_interval_tree_remove+0xc75/0xec0 [ 30.781552] Read of size 8 at addr ffff88800c4c9880 by task sshd/220 [ 30.782328] [ 30.782714] CPU: 1 PID: 220 Comm: sshd Not tainted 6.4.0-rc7-next-20230620 #1 [ 30.783616] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS 1.12.0-1 04/01/2014 [ 30.784608] Call Trace: [ 30.784965] [ 30.785251] dump_stack_lvl+0x91/0xf0 [ 30.785746] print_report+0xcc/0x620 [ 30.786236] ? __virt_addr_valid+0x102/0x340 [ 30.786789] ? vma_interval_tree_remove+0xc75/0xec0 [ 30.787406] ? vma_interval_tree_remove+0xc75/0xec0 [ 30.788024] kasan_report+0xbe/0xf0 [ 30.788504] ? vma_interval_tree_remove+0xc75/0xec0 [ 30.789160] vma_interval_tree_remove+0xc75/0xec0 [ 30.789767] vma_prepare+0xc54/0x11a0 [ 30.790248] __split_vma+0x5af/0x950 [ 30.790727] ? __pfx___split_vma+0x10/0x10 [ 30.791254] ? find_held_lock+0x2c/0x110 [ 30.791779] do_vmi_align_munmap+0x2ba/0x11f0 [ 30.792353] ? lock_is_held_type+0x9f/0x120 [ 30.792927] ? __pfx_do_vmi_align_munmap+0x10/0x10 [ 30.793547] ? mtree_range_walk+0x632/0x900 [ 30.794107] ? mas_walk+0x5c7/0x7c0 [ 30.794583] do_vmi_munmap+0x1f1/0x2b0 [ 30.795080] mmap_region+0x1f9/0x2660 [ 30.795581] ? vm_mmap_pgoff+0x15c/0x3a0 [ 30.796097] ? __pfx_arch_get_unmapped_area_topdown+0x10/0x10 [ 30.796852] ? __pfx_lock_acquire+0x10/0x10 [ 30.797390] ? __pfx_mmap_region+0x10/0x10 [ 30.797926] ? security_mmap_addr+0x7d/0xa0 [ 30.798458] ? get_unmapped_area+0x1f5/0x3f0 [ 30.799012] do_mmap+0x854/0xf00 [ 30.799459] vm_mmap_pgoff+0x1a6/0x3a0 [ 30.799968] ? __pfx_vm_mmap_pgoff+0x10/0x10 [ 30.800527] ksys_mmap_pgoff+0x3af/0x500 [ 30.801054] do_syscall_64+0x3f/0x90 [ 30.801542] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 30.802200] RIP: 0033:0x7f9868f60d82 [ 30.802662] 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 [ 30.804860] RSP: 002b:00007ffcfee414c8 EFLAGS: 00000206 ORIG_RAX: 0000000000000009 [ 30.805766] RAX: ffffffffffffffda RBX: 0000000000000812 RCX: 00007f9868f60d82 [ 30.806618] RDX: 0000000000000005 RSI: 0000000000001000 RDI: 00007f986839a000 [ 30.807468] RBP: 00007f986839a000 R08: 0000000000000009 R09: 0000000000001000 [ 30.808313] R10: 0000000000000812 R11: 0000000000000206 R12: 000055c62ea85ec0 [ 30.809187] R13: 00007ffcfee414e0 R14: 00007ffcfee41510 R15: 00007ffcfee41870 [ 30.810043] [ 30.810337] [ 30.810555] Allocated by task 213: [ 30.810990] kasan_save_stack+0x22/0x50 [ 30.811499] kasan_set_track+0x25/0x30 [ 30.811997] __kasan_slab_alloc+0x59/0x70 [ 30.812533] kmem_cache_alloc+0x16b/0x370 [ 30.813071] vm_area_dup+0x20/0x160 [ 30.813533] __split_vma+0x170/0x950 [ 30.814006] split_vma+0xc6/0x110 [ 30.814446] mprotect_fixup+0x8d2/0xb30 [ 30.814958] do_mprotect_pkey+0x87e/0xd40 [ 30.815490] __x64_sys_mprotect+0x78/0xc0 [ 30.816021] do_syscall_64+0x3f/0x90 [ 30.816515] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 30.817186] [ 30.817406] Freed by task 213: [ 30.817813] kasan_save_stack+0x22/0x50 [ 30.818318] kasan_set_track+0x25/0x30 [ 30.818832] kasan_save_free_info+0x2b/0x50 [ 30.819368] __kasan_slab_free+0x10a/0x190 [ 30.819911] kmem_cache_free+0x10d/0x4d0 [ 30.820427] rcu_core+0x8c8/0x2860 [ 30.820893] __do_softirq+0x1b7/0x7d4 [ 30.821373] [ 30.821589] Last potentially related work creation: [ 30.822177] kasan_save_stack+0x22/0x50 [ 30.822681] __kasan_record_aux_stack+0x8e/0xa0 [ 30.823268] __call_rcu_common.constprop.0+0x6a/0xb90 [ 30.823911] remove_vma+0x139/0x170 [ 30.824494] do_vmi_align_munmap+0xd4a/0x11f0 [ 30.825071] do_vmi_munmap+0x1f1/0x2b0 [ 30.825574] __vm_munmap+0x138/0x3a0 [ 30.826047] __x64_sys_munmap+0x59/0x80 [ 30.826548] do_syscall_64+0x3f/0x90 [ 30.827035] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 30.827695] [ 30.827910] The buggy address belongs to the object at ffff88800c4c9828 [ 30.827910] which belongs to the cache vm_area_struct of size 168 [ 30.829402] The buggy address is located 88 bytes inside of [ 30.829402] freed 168-byte region [ffff88800c4c9828, ffff88800c4c98d0) [ 30.830838] [ 30.831057] The buggy address belongs to the physical page: [ 30.831728] page:0000000032c3758d refcount:1 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0xc4c9 [ 30.832831] memcg:ffff88800cbb1001 [ 30.833252] flags: 0x100000000000200(slab|node=0|zone=1) [ 30.833916] page_type: 0xffffffff() [ 30.834376] raw: 0100000000000200 ffff8880087a0c80 dead000000000100 dead000000000122 [ 30.835302] raw: 0000000000000000 0000000000110011 00000001ffffffff ffff88800cbb1001 [ 30.836211] page dumped because: kasan: bad access detected [ 30.836888] [ 30.837103] Memory state around the buggy address: [ 30.837682] ffff88800c4c9780: 00 00 00 00 00 00 00 00 00 00 00 00 00 fc fc fc [ 30.838532] ffff88800c4c9800: fc fc fc fc fc fa fb fb fb fb fb fb fb fb fb fb [ 30.839396] >ffff88800c4c9880: fb fb fb fb fb fb fb fb fb fb fc fc fc fc fc fc [ 30.840240] ^ [ 30.840651] ffff88800c4c9900: fc fc fa fb fb fb fb fb fb fb fb fb fb fb fb fb [ 30.841516] ffff88800c4c9980: fb fb fb fb fb fb fb fc fc fc fc fc fc fc fc fa [ 30.842374] ================================================================== [ 30.843329] Disabling lock debugging due to kernel taint [ 33.593415] BUG: Bad rss-counter state mm:000000009724142e type:MM_FILEPAGES val:33 [ 33.594465] BUG: Bad rss-counter state mm:000000009724142e type:MM_ANONPAGES val:22 [ 34.067725] BUG: Bad rss-counter state mm:000000004e093b09 type:MM_FILEPAGES val:33 [ 34.069385] BUG: Bad rss-counter state mm:000000004e093b09 type:MM_ANONPAGES val:22 Warning: Permanently added '[localhost]:16620' (ECDSA) to the list of known hosts. 2023/06/20 16:23:23 fuzzer started 2023/06/20 16:23:23 dialing manager at localhost:36067 2023/06/20 16:23:23 checking machine... 2023/06/20 16:23:23 checking revisions... [ 34.801356] kmemleak: Automatic memory scanning thread ended 2023/06/20 16:23:24 testing simple program... [ 34.846136] cgroup: Unknown subsys name 'net' [ 34.899929] cgroup: Unknown subsys name 'rlimit' executing program executing program executing program VM DIAGNOSIS: 16:23:23 Registers: info registers vcpu 0 RAX=1ffffffff0c96da4 RBX=0000000000000002 RCX=ffffffff864b6d1e RDX=0000000000000000 RSI=dffffc0000000000 RDI=ffff88806ce09b00 RBP=ffff88806ce09af0 RSP=ffff88806ce09a28 R8 =ffffffff864b6d22 R9 =ffff88806ce09ad8 R10=0000000000038001 R11=00000000000b5d59 R12=ffff88806ce09af8 R13=ffff88806ce09ae0 R14=ffff88806ce09fe8 R15=ffff88806ce09a98 RIP=ffffffff81131118 RFL=00000212 [----A--] 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 00007f06ffcf3900 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=00007f07002ab0b0 CR3=000000000edfe000 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=2033323a33323a3631203032206e754a XMM01=73732878696e755f6d6170203a5d3932 XMM02=65736f6c63206e6f6973736573203a29 XMM03=755f6d6170203a5d3932325b64687373 XMM04=69662068637573206f4e203a656c6163 XMM05=3a656c696620766e65206e65706f206f XMM06=65733a6468737328766e655f6d617020 XMM07=6b7a79732033323a33323a3631203032 XMM08=3d656e696c646d632022656369767265 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=00007f20dbda7aa0 CR3=0000000008c6c000 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=4c2a865655acbe88da4d21fc07445351 XMM02=000000000011cb70ec2efd57dc4c00df XMM03=000000000012120001ee5e7562af7d96 XMM04=22f4eed487664d5a00000000000ae988 XMM05=19e9129bd510f2350000000000131278 XMM06=4fda316b135da52b0000000000131100 XMM07=e042d86d42eb936e0000000000121480 XMM08=01ee5e7562af7d96000000000011cbd0 XMM09=00000000000000000000000000000000 XMM10=20200000000020202020202020200000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000