syzkaller login: [ 31.202586] BUG: Bad rss-counter state mm:00000000be163d1a type:MM_FILEPAGES val:33 [ 31.204215] BUG: Bad rss-counter state mm:00000000be163d1a type:MM_ANONPAGES val:22 [ 31.373897] ================================================================== [ 31.374827] BUG: KASAN: slab-use-after-free in vma_interval_tree_remove+0xc75/0xec0 [ 31.375763] Read of size 8 at addr ffff88800e18a6b0 by task sshd/222 [ 31.376658] [ 31.376879] CPU: 0 PID: 222 Comm: sshd Not tainted 6.4.0-rc7-next-20230620 #1 [ 31.377747] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS 1.12.0-1 04/01/2014 [ 31.378776] Call Trace: [ 31.379099] [ 31.379383] dump_stack_lvl+0x91/0xf0 [ 31.379881] print_report+0xcc/0x620 [ 31.380365] ? __virt_addr_valid+0x102/0x340 [ 31.380930] ? vma_interval_tree_remove+0xc75/0xec0 [ 31.381549] ? vma_interval_tree_remove+0xc75/0xec0 [ 31.382218] kasan_report+0xbe/0xf0 [ 31.382705] ? vma_interval_tree_remove+0xc75/0xec0 [ 31.383329] vma_interval_tree_remove+0xc75/0xec0 [ 31.383934] vma_prepare+0xc54/0x11a0 [ 31.384411] __split_vma+0x5af/0x950 [ 31.384887] ? __pfx___split_vma+0x10/0x10 [ 31.385416] ? find_held_lock+0x2c/0x110 [ 31.385943] do_vmi_align_munmap+0x2ba/0x11f0 [ 31.386501] ? lock_is_held_type+0x9f/0x120 [ 31.387037] ? __pfx_do_vmi_align_munmap+0x10/0x10 [ 31.387644] ? mtree_range_walk+0x632/0x900 [ 31.388199] ? mas_walk+0x5c7/0x7c0 [ 31.388674] do_vmi_munmap+0x1f1/0x2b0 [ 31.389176] mmap_region+0x1f9/0x2660 [ 31.389660] ? vm_mmap_pgoff+0x15c/0x3a0 [ 31.390178] ? __pfx_arch_get_unmapped_area_topdown+0x10/0x10 [ 31.390889] ? __pfx_lock_acquire+0x10/0x10 [ 31.391472] ? __pfx_mmap_region+0x10/0x10 [ 31.392013] ? security_mmap_addr+0x7d/0xa0 [ 31.392571] ? get_unmapped_area+0x1f5/0x3f0 [ 31.393129] do_mmap+0x854/0xf00 [ 31.393594] vm_mmap_pgoff+0x1a6/0x3a0 [ 31.394115] ? __pfx_vm_mmap_pgoff+0x10/0x10 [ 31.394699] ksys_mmap_pgoff+0x3af/0x500 [ 31.395222] do_syscall_64+0x3f/0x90 [ 31.395716] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 31.396393] RIP: 0033:0x7f5453ee6d82 [ 31.396852] 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 [ 31.399048] RSP: 002b:00007fffd43e6798 EFLAGS: 00000206 ORIG_RAX: 0000000000000009 [ 31.399980] RAX: ffffffffffffffda RBX: 0000000000000812 RCX: 00007f5453ee6d82 [ 31.400858] RDX: 0000000000000005 RSI: 0000000000001000 RDI: 00007f5453320000 [ 31.401737] RBP: 00007f5453320000 R08: 0000000000000009 R09: 0000000000001000 [ 31.402619] R10: 0000000000000812 R11: 0000000000000206 R12: 0000557c6cd7cb20 [ 31.403486] R13: 00007fffd43e67b0 R14: 00007fffd43e67e0 R15: 00007fffd43e6b40 [ 31.404409] [ 31.404710] [ 31.404926] Allocated by task 215: [ 31.405373] kasan_save_stack+0x22/0x50 [ 31.405899] kasan_set_track+0x25/0x30 [ 31.406416] __kasan_slab_alloc+0x59/0x70 [ 31.406958] kmem_cache_alloc+0x16b/0x370 [ 31.407506] vm_area_dup+0x20/0x160 [ 31.407969] __split_vma+0x170/0x950 [ 31.408455] split_vma+0xc6/0x110 [ 31.408896] mprotect_fixup+0x8d2/0xb30 [ 31.409410] do_mprotect_pkey+0x87e/0xd40 [ 31.409957] __x64_sys_mprotect+0x78/0xc0 [ 31.410507] do_syscall_64+0x3f/0x90 [ 31.410989] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 31.411652] [ 31.411868] Freed by task 215: [ 31.412267] kasan_save_stack+0x22/0x50 [ 31.412797] kasan_set_track+0x25/0x30 [ 31.413297] kasan_save_free_info+0x2b/0x50 [ 31.413861] __kasan_slab_free+0x10a/0x190 [ 31.414426] kmem_cache_free+0x10d/0x4d0 [ 31.414937] rcu_core+0x8c8/0x2860 [ 31.415398] __do_softirq+0x1b7/0x7d4 [ 31.415881] [ 31.416103] Last potentially related work creation: [ 31.416720] kasan_save_stack+0x22/0x50 [ 31.417232] __kasan_record_aux_stack+0x8e/0xa0 [ 31.417819] __call_rcu_common.constprop.0+0x6a/0xb90 [ 31.418507] remove_vma+0x139/0x170 [ 31.418969] do_vmi_align_munmap+0xd4a/0x11f0 [ 31.419557] do_vmi_munmap+0x1f1/0x2b0 [ 31.420046] __vm_munmap+0x138/0x3a0 [ 31.420554] __x64_sys_munmap+0x59/0x80 [ 31.421057] do_syscall_64+0x3f/0x90 [ 31.421557] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 31.422218] [ 31.422451] The buggy address belongs to the object at ffff88800e18a658 [ 31.422451] which belongs to the cache vm_area_struct of size 168 [ 31.423937] The buggy address is located 88 bytes inside of [ 31.423937] freed 168-byte region [ffff88800e18a658, ffff88800e18a700) [ 31.425365] [ 31.425592] The buggy address belongs to the physical page: [ 31.426276] page:000000009c687326 refcount:1 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0xe18a [ 31.427397] memcg:ffff88800edafa01 [ 31.427834] flags: 0x100000000000200(slab|node=0|zone=1) [ 31.428507] page_type: 0xffffffff() [ 31.428960] raw: 0100000000000200 ffff8880087a0c80 ffffea000039a580 dead000000000002 [ 31.429917] raw: 0000000000000000 0000000000110011 00000001ffffffff ffff88800edafa01 [ 31.430845] page dumped because: kasan: bad access detected [ 31.431527] [ 31.431747] Memory state around the buggy address: [ 31.432337] ffff88800e18a580: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 [ 31.433201] ffff88800e18a600: 00 00 00 fc fc fc fc fc fc fc fc fa fb fb fb fb [ 31.434101] >ffff88800e18a680: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb [ 31.434963] ^ [ 31.435558] ffff88800e18a700: fc fc fc fc fc fc fc fc 00 00 00 00 00 00 00 00 [ 31.436434] ffff88800e18a780: 00 00 00 00 00 00 00 00 00 00 00 00 00 fc fc fc [ 31.437288] ================================================================== [ 31.438315] Disabling lock debugging due to kernel taint [ 33.438506] BUG: Bad rss-counter state mm:0000000052781dac type:MM_FILEPAGES val:33 [ 33.439700] BUG: Bad rss-counter state mm:0000000052781dac type:MM_ANONPAGES val:22 [ 33.931540] BUG: Bad rss-counter state mm:00000000a2425206 type:MM_FILEPAGES val:33 [ 33.932714] BUG: Bad rss-counter state mm:00000000a2425206 type:MM_ANONPAGES val:22 Warning: Permanently added '[localhost]:43975' (ECDSA) to the list of known hosts. 2023/06/20 19:47:30 fuzzer started 2023/06/20 19:47:31 dialing manager at localhost:36067 2023/06/20 19:47:31 checking machine... 2023/06/20 19:47:31 checking revisions... [ 34.671720] kmemleak: Automatic memory scanning thread ended 2023/06/20 19:47:31 testing simple program... [ 34.709547] cgroup: Unknown subsys name 'net' [ 34.748039] cgroup: Unknown subsys name 'rlimit' executing program executing program executing program VM DIAGNOSIS: 19:47:30 Registers: info registers vcpu 0 RAX=0000000000000000 RBX=00000000000000e8 RCX=0000000000000000 RDX=ffff888016440000 RSI=ffffffff82157cfd RDI=0000000000000006 RBP=00007ffe5d50ab40 RSP=ffff888016bef750 R8 =0000000000000006 R9 =00007ffe5d50ab40 R10=00007ffe5d50ac28 R11=0000000000000000 R12=ffff888015df8ec0 R13=00007ffe5d50ac28 R14=0000000000000000 R15=ffff888016befe70 RIP=ffffffff814c089b 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 00007f26e91b5900 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=00007ffe5d508000 CR3=000000000e60e000 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=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 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=00007fc44e0f7270 CR3=000000000c924000 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=2030333a37343a3931203032206e754a XMM01=73732878696e755f6d6170203a5d3233 XMM02=65736f6c63206e6f6973736573203a29 XMM03=755f6d6170203a5d3233325b64687373 XMM04=69662068637573206f4e203a656c6163 XMM05=3a656c696620766e65206e65706f206f XMM06=65733a6468737328766e655f6d617020 XMM07=6b7a79732030333a37343a3931203032 XMM08=3d656e696c646d632022656369767265 XMM09=00000000000000000000000000000000 XMM10=00000000000000000000000000000000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000