syzkaller login: [ 38.769731] BUG: Bad rss-counter state mm:000000003667c67b type:MM_FILEPAGES val:33 [ 38.771501] BUG: Bad rss-counter state mm:000000003667c67b type:MM_ANONPAGES val:22 [ 38.938832] ================================================================== [ 38.940052] BUG: KASAN: slab-use-after-free in vma_interval_tree_remove+0xc75/0xec0 [ 38.941037] Read of size 8 at addr ffff88801a0e5880 by task sshd/220 [ 38.941987] [ 38.942255] CPU: 1 PID: 220 Comm: sshd Not tainted 6.4.0-rc7-next-20230620 #1 [ 38.943162] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS 1.12.0-1 04/01/2014 [ 38.944224] Call Trace: [ 38.944477] <TASK> [ 38.944703] dump_stack_lvl+0x91/0xf0 [ 38.945095] print_report+0xcc/0x620 [ 38.945477] ? __virt_addr_valid+0x102/0x340 [ 38.945905] ? vma_interval_tree_remove+0xc75/0xec0 [ 38.946388] ? vma_interval_tree_remove+0xc75/0xec0 [ 38.946866] kasan_report+0xbe/0xf0 [ 38.947243] ? vma_interval_tree_remove+0xc75/0xec0 [ 38.947725] vma_interval_tree_remove+0xc75/0xec0 [ 38.948191] vma_prepare+0xc54/0x11a0 [ 38.948565] __split_vma+0x5af/0x950 [ 38.948933] ? __pfx___split_vma+0x10/0x10 [ 38.949351] ? find_held_lock+0x2c/0x110 [ 38.949758] do_vmi_align_munmap+0x2ba/0x11f0 [ 38.950197] ? lock_is_held_type+0x9f/0x120 [ 38.950616] ? __pfx_do_vmi_align_munmap+0x10/0x10 [ 38.951087] ? mtree_range_walk+0x632/0x900 [ 38.951513] ? mas_walk+0x5c7/0x7c0 [ 38.951882] do_vmi_munmap+0x1f1/0x2b0 [ 38.952264] mmap_region+0x1f9/0x2660 [ 38.952635] ? vm_mmap_pgoff+0x15c/0x3a0 [ 38.953031] ? __pfx_arch_get_unmapped_area_topdown+0x10/0x10 [ 38.953606] ? __pfx_lock_acquire+0x10/0x10 [ 38.954017] ? __pfx_mmap_region+0x10/0x10 [ 38.954421] ? security_mmap_addr+0x7d/0xa0 [ 38.954828] ? get_unmapped_area+0x1f5/0x3f0 [ 38.955251] do_mmap+0x854/0xf00 [ 38.955591] vm_mmap_pgoff+0x1a6/0x3a0 [ 38.955974] ? __pfx_vm_mmap_pgoff+0x10/0x10 [ 38.956410] ksys_mmap_pgoff+0x3af/0x500 [ 38.956802] do_syscall_64+0x3f/0x90 [ 38.957178] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 38.957680] RIP: 0033:0x7f9551e2dd82 [ 38.958033] 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 [ 38.959662] RSP: 002b:00007ffd23970088 EFLAGS: 00000206 ORIG_RAX: 0000000000000009 [ 38.960360] RAX: ffffffffffffffda RBX: 0000000000000812 RCX: 00007f9551e2dd82 [ 38.961013] RDX: 0000000000000005 RSI: 0000000000001000 RDI: 00007f9551267000 [ 38.961670] RBP: 00007f9551267000 R08: 0000000000000009 R09: 0000000000001000 [ 38.962315] R10: 0000000000000812 R11: 0000000000000206 R12: 00005575e8677ec0 [ 38.962958] R13: 00007ffd239700a0 R14: 00007ffd239700d0 R15: 00007ffd23970430 [ 38.963611] </TASK> [ 38.963837] [ 38.964001] Allocated by task 213: [ 38.964330] kasan_save_stack+0x22/0x50 [ 38.964713] kasan_set_track+0x25/0x30 [ 38.965109] __kasan_slab_alloc+0x59/0x70 [ 38.965510] kmem_cache_alloc+0x16b/0x370 [ 38.965904] vm_area_dup+0x20/0x160 [ 38.966252] __split_vma+0x170/0x950 [ 38.966606] split_vma+0xc6/0x110 [ 38.966944] mprotect_fixup+0x8d2/0xb30 [ 38.967330] do_mprotect_pkey+0x87e/0xd40 [ 38.967729] __x64_sys_mprotect+0x78/0xc0 [ 38.968128] do_syscall_64+0x3f/0x90 [ 38.968494] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 38.968988] [ 38.969161] Freed by task 213: [ 38.969460] kasan_save_stack+0x22/0x50 [ 38.969846] kasan_set_track+0x25/0x30 [ 38.970224] kasan_save_free_info+0x2b/0x50 [ 38.970630] __kasan_slab_free+0x10a/0x190 [ 38.971039] kmem_cache_free+0x10d/0x4d0 [ 38.971429] rcu_core+0x8c8/0x2860 [ 38.971767] __do_softirq+0x1b7/0x7d4 [ 38.972133] [ 38.972301] Last potentially related work creation: [ 38.972875] kasan_save_stack+0x22/0x50 [ 38.973281] __kasan_record_aux_stack+0x8e/0xa0 [ 38.973717] __call_rcu_common.constprop.0+0x6a/0xb90 [ 38.974205] remove_vma+0x139/0x170 [ 38.974548] do_vmi_align_munmap+0xd4a/0x11f0 [ 38.974970] do_vmi_munmap+0x1f1/0x2b0 [ 38.975344] __vm_munmap+0x138/0x3a0 [ 38.975699] __x64_sys_munmap+0x59/0x80 [ 38.976074] do_syscall_64+0x3f/0x90 [ 38.976433] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 38.976919] [ 38.977092] The buggy address belongs to the object at ffff88801a0e5828 [ 38.977092] which belongs to the cache vm_area_struct of size 168 [ 38.978197] The buggy address is located 88 bytes inside of [ 38.978197] freed 168-byte region [ffff88801a0e5828, ffff88801a0e58d0) [ 38.979255] [ 38.979418] The buggy address belongs to the physical page: [ 38.979914] page:00000000220701b4 refcount:1 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0x1a0e5 [ 38.980742] memcg:ffff88801a094001 [ 38.981081] anon flags: 0x100000000000200(slab|node=0|zone=1) [ 38.981612] page_type: 0xffffffff() [ 38.981952] raw: 0100000000000200 ffff8880087a0c80 0000000000000000 dead000000000001 [ 38.982651] raw: 0000000000000000 0000000000110011 00000001ffffffff ffff88801a094001 [ 38.983445] page dumped because: kasan: bad access detected [ 38.983943] [ 38.984108] Memory state around the buggy address: [ 38.984545] ffff88801a0e5780: 00 00 00 00 00 00 00 00 00 00 00 00 00 fc fc fc [ 38.985201] ffff88801a0e5800: fc fc fc fc fc fa fb fb fb fb fb fb fb fb fb fb [ 38.985847] >ffff88801a0e5880: fb fb fb fb fb fb fb fb fb fb fc fc fc fc fc fc [ 38.986485] ^ [ 38.986796] ffff88801a0e5900: fc fc 00 00 00 00 00 00 00 00 00 00 00 00 00 00 [ 38.987439] ffff88801a0e5980: 00 00 00 00 00 00 00 fc fc fc fc fc fc fc fc 00 [ 38.988077] ================================================================== [ 38.988980] Disabling lock debugging due to kernel taint [ 40.967078] BUG: Bad rss-counter state mm:00000000a4c0736f type:MM_FILEPAGES val:33 [ 40.968492] BUG: Bad rss-counter state mm:00000000a4c0736f type:MM_ANONPAGES val:22 [ 41.348714] BUG: Bad rss-counter state mm:00000000fa53163d type:MM_FILEPAGES val:33 [ 41.350630] BUG: Bad rss-counter state mm:00000000fa53163d type:MM_ANONPAGES val:22 Warning: Permanently added '[localhost]:24879' (ECDSA) to the list of known hosts. 2023/06/21 00:18:41 fuzzer started 2023/06/21 00:18:41 dialing manager at localhost:36067 2023/06/21 00:18:41 checking machine... 2023/06/21 00:18:41 checking revisions... [ 42.099570] kmemleak: Automatic memory scanning thread ended 2023/06/21 00:18:41 testing simple program... [ 42.159288] cgroup: Unknown subsys name 'net' [ 42.214772] cgroup: Unknown subsys name 'rlimit' executing program executing program executing program VM DIAGNOSIS: 00:18:41 Registers: info registers vcpu 0 RAX=ffff88806ce35000 RBX=0000000000000000 RCX=ffffffff8451250e RDX=ffffed100d9c6a01 RSI=0000000000000004 RDI=ffffffff81288ac5 RBP=dffffc0000000000 RSP=ffffffff85407e10 R8 =0000000000000000 R9 =ffffed100d9c6a00 R10=ffff88806ce35003 R11=ffff888008c04000 R12=ffffffff85d3d350 R13=1ffffffff0a80fc7 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 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=00007f0cc29815b0 CR3=000000000d600000 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=2030343a38313a3030203132206e754a XMM01=73732878696e755f6d6170203a5d3932 XMM02=65736f6c63206e6f6973736573203a29 XMM03=755f6d6170203a5d3932325b64687373 XMM04=69662068637573206f4e203a656c6163 XMM05=3a656c696620766e65206e65706f206f XMM06=65733a6468737328766e655f6d617020 XMM07=6b7a79732030343a38313a3030203132 XMM08=3d656e696c646d632022656369767265 XMM09=00000000000000000000000000000000 XMM10=00000000000000000000000000000000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000 info registers vcpu 1 RAX=dffffc0000000000 RBX=0000000000000001 RCX=0000000000000001 RDX=1ffff11002c94e13 RSI=ffff8880164a7f48 RDI=ffff8880164a70a0 RBP=0000000000000000 RSP=ffff8880164a6fe0 R8 =0000000000000001 R9 =ffff8880164a7090 R10=0000000000038001 R11=00000000000b5080 R12=ffff8880164a70b0 R13=ffff8880164a7098 R14=ffff8880164a7f48 R15=ffff8880164a7050 RIP=ffffffff81131c60 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 00007f4811ca5900 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=00007f4811c4a008 CR3=000000000f280000 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=652022746f6f72223d74636361207469 XMM02=3d6c616e696d72657420322e322e302e XMM03=3d656d616e74736f682022646873732f XMM04=40404040404040404040404040404040 XMM05=5a5a5a5a5a5a5a5a5a5a5a5a5a5a5a5a XMM06=20202020202020202020202020202020 XMM07=00000000000000000000000000000000 XMM08=652075253d64692073253d706f000000 XMM09=00000000000000000000000000000000 XMM10=00000000000000000000000000000000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000