syzkaller login: [ 30.466346] BUG: Bad rss-counter state mm:00000000c141087f type:MM_FILEPAGES val:33 [ 30.467910] BUG: Bad rss-counter state mm:00000000c141087f type:MM_ANONPAGES val:22 [ 30.645379] ================================================================== [ 30.646622] BUG: KASAN: slab-use-after-free in vma_interval_tree_remove+0xc75/0xec0 [ 30.648041] Read of size 8 at addr ffff888018c405c8 by task sshd/221 [ 30.649088] [ 30.649403] CPU: 1 PID: 221 Comm: sshd Not tainted 6.4.0-rc7-next-20230620 #1 [ 30.650400] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS 1.12.0-1 04/01/2014 [ 30.651516] Call Trace: [ 30.651876] [ 30.652202] dump_stack_lvl+0x91/0xf0 [ 30.652785] print_report+0xcc/0x620 [ 30.653337] ? __virt_addr_valid+0x102/0x340 [ 30.653967] ? vma_interval_tree_remove+0xc75/0xec0 [ 30.654672] ? vma_interval_tree_remove+0xc75/0xec0 [ 30.655366] kasan_report+0xbe/0xf0 [ 30.655914] ? vma_interval_tree_remove+0xc75/0xec0 [ 30.656638] vma_interval_tree_remove+0xc75/0xec0 [ 30.657329] vma_prepare+0xc54/0x11a0 [ 30.657873] __split_vma+0x5af/0x950 [ 30.658414] ? __pfx___split_vma+0x10/0x10 [ 30.659019] ? find_held_lock+0x2c/0x110 [ 30.659635] do_vmi_align_munmap+0x2ba/0x11f0 [ 30.660290] ? lock_is_held_type+0x9f/0x120 [ 30.660935] ? __pfx_do_vmi_align_munmap+0x10/0x10 [ 30.661623] ? mtree_range_walk+0x632/0x900 [ 30.662265] ? mas_walk+0x5c7/0x7c0 [ 30.662802] do_vmi_munmap+0x1f1/0x2b0 [ 30.663368] mmap_region+0x1f9/0x2660 [ 30.663921] ? vm_mmap_pgoff+0x15c/0x3a0 [ 30.664500] ? __pfx_arch_get_unmapped_area_topdown+0x10/0x10 [ 30.665321] ? __pfx_lock_acquire+0x10/0x10 [ 30.665922] ? __pfx_mmap_region+0x10/0x10 [ 30.666521] ? security_mmap_addr+0x7d/0xa0 [ 30.667114] ? get_unmapped_area+0x1f5/0x3f0 [ 30.667742] do_mmap+0x854/0xf00 [ 30.668236] vm_mmap_pgoff+0x1a6/0x3a0 [ 30.668802] ? __pfx_vm_mmap_pgoff+0x10/0x10 [ 30.669436] ksys_mmap_pgoff+0x3af/0x500 [ 30.670007] do_syscall_64+0x3f/0x90 [ 30.670543] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 30.671269] RIP: 0033:0x7f439bd13d82 [ 30.671781] 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 [ 30.674202] RSP: 002b:00007ffec0c6b8a8 EFLAGS: 00000206 ORIG_RAX: 0000000000000009 [ 30.675218] RAX: ffffffffffffffda RBX: 0000000000000812 RCX: 00007f439bd13d82 [ 30.676180] RDX: 0000000000000005 RSI: 0000000000001000 RDI: 00007f439b14d000 [ 30.677147] RBP: 00007f439b14d000 R08: 0000000000000009 R09: 0000000000001000 [ 30.678126] R10: 0000000000000812 R11: 0000000000000206 R12: 00005590bccc1b20 [ 30.679092] R13: 00007ffec0c6b8c0 R14: 00007ffec0c6b8f0 R15: 00007ffec0c6bc50 [ 30.680052] [ 30.680379] [ 30.680645] Allocated by task 214: [ 30.681129] kasan_save_stack+0x22/0x50 [ 30.681706] kasan_set_track+0x25/0x30 [ 30.682280] __kasan_slab_alloc+0x59/0x70 [ 30.682873] kmem_cache_alloc+0x16b/0x370 [ 30.683457] vm_area_dup+0x20/0x160 [ 30.683973] __split_vma+0x170/0x950 [ 30.684491] split_vma+0xc6/0x110 [ 30.685011] mprotect_fixup+0x8d2/0xb30 [ 30.685588] do_mprotect_pkey+0x87e/0xd40 [ 30.686179] __x64_sys_mprotect+0x78/0xc0 [ 30.686773] do_syscall_64+0x3f/0x90 [ 30.687324] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 30.688122] [ 30.688369] Freed by task 203: [ 30.688822] kasan_save_stack+0x22/0x50 [ 30.689390] kasan_set_track+0x25/0x30 [ 30.689951] kasan_save_free_info+0x2b/0x50 [ 30.690556] __kasan_slab_free+0x10a/0x190 [ 30.691154] kmem_cache_free+0x10d/0x4d0 [ 30.691727] rcu_core+0x8c8/0x2860 [ 30.692224] __do_softirq+0x1b7/0x7d4 [ 30.692768] [ 30.693012] Last potentially related work creation: [ 30.693664] kasan_save_stack+0x22/0x50 [ 30.694243] __kasan_record_aux_stack+0x8e/0xa0 [ 30.694887] __call_rcu_common.constprop.0+0x6a/0xb90 [ 30.695601] remove_vma+0x139/0x170 [ 30.696115] do_vmi_align_munmap+0xd4a/0x11f0 [ 30.696756] do_vmi_munmap+0x1f1/0x2b0 [ 30.697304] __vm_munmap+0x138/0x3a0 [ 30.697832] __x64_sys_munmap+0x59/0x80 [ 30.698386] do_syscall_64+0x3f/0x90 [ 30.698915] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 30.699640] [ 30.699887] The buggy address belongs to the object at ffff888018c40570 [ 30.699887] which belongs to the cache vm_area_struct of size 168 [ 30.701544] The buggy address is located 88 bytes inside of [ 30.701544] freed 168-byte region [ffff888018c40570, ffff888018c40618) [ 30.703132] [ 30.703375] The buggy address belongs to the physical page: [ 30.704125] page:00000000eeeb65cf refcount:1 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0x18c40 [ 30.705377] memcg:ffff8880165f0f01 [ 30.705851] flags: 0x100000000000200(slab|node=0|zone=1) [ 30.706581] page_type: 0xffffffff() [ 30.707116] raw: 0100000000000200 ffff8880087a0c80 dead000000000122 0000000000000000 [ 30.708168] raw: 0000000000000000 0000000000110011 00000001ffffffff ffff8880165f0f01 [ 30.709201] page dumped because: kasan: bad access detected [ 30.709970] [ 30.710208] Memory state around the buggy address: [ 30.710875] ffff888018c40480: fc 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 [ 30.711836] ffff888018c40500: 00 00 00 00 00 00 fc fc fc fc fc fc fc fc fa fb [ 30.712823] >ffff888018c40580: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb [ 30.713781] ^ [ 30.714524] ffff888018c40600: fb fb fb fc fc fc fc fc fc fc fc fa fb fb fb fb [ 30.715478] ffff888018c40680: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb [ 30.716418] ================================================================== [ 30.717496] Disabling lock debugging due to kernel taint [ 32.984729] BUG: Bad rss-counter state mm:00000000c35a6e67 type:MM_FILEPAGES val:33 [ 32.985907] BUG: Bad rss-counter state mm:00000000c35a6e67 type:MM_ANONPAGES val:22 [ 33.453748] BUG: Bad rss-counter state mm:00000000e1fe50a2 type:MM_FILEPAGES val:33 [ 33.454933] BUG: Bad rss-counter state mm:00000000e1fe50a2 type:MM_ANONPAGES val:22 Warning: Permanently added '[localhost]:27213' (ECDSA) to the list of known hosts. 2023/06/20 12:27:14 fuzzer started 2023/06/20 12:27:14 dialing manager at localhost:36067 2023/06/20 12:27:14 checking machine... 2023/06/20 12:27:14 checking revisions... [ 34.078361] kmemleak: Automatic memory scanning thread ended 2023/06/20 12:27:14 testing simple program... [ 34.130138] cgroup: Unknown subsys name 'net' [ 34.186308] cgroup: Unknown subsys name 'rlimit' executing program executing program executing program VM DIAGNOSIS: 12:27:13 Registers: info registers vcpu 0 RAX=1ffff110012d5969 RBX=ffff8880096acb18 RCX=ffffffff84536871 RDX=0000000000000000 RSI=0000000000000000 RDI=ffff8880096acb48 RBP=ffff888015c3d1a0 RSP=ffff88806ce09dd8 R8 =0000000000000001 R9 =fffffbfff0adb094 R10=ffffffff856d84a3 R11=00000000000b6a61 R12=dffffc0000000000 R13=ffff888015c3dbe8 R14=ffffffff813782f8 R15=ffff88800d661700 RIP=ffffffff818464e2 RFL=00000046 [---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 00007f9bf1a00700 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=00007f6b4ead00b0 CR3=000000000e01a000 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=6d6f72662064657463656e6e6f637369 XMM02=2e303120746f6f722072657375206d6f XMM03=3a5d3133325b646873732033313a3732 XMM04=6456774875434142334f726f59427469 XMM05=485320415352203a3268737320323032 XMM06=206d6f726620746f6f7220726f662079 XMM07=00000000000000000000000000000000 XMM08=3a677562656420676f6c737973720000 XMM09=00000000000000000000000000000000 XMM10=00000000000000000000000000000000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000 info registers vcpu 1 RAX=dffffc0000000000 RBX=ffff88806cf09b30 RCX=ffffffff81132ffe RDX=1ffff1100d9e135c RSI=ffff888008d951c0 RDI=ffff88806cf09a48 RBP=ffff888008d951c0 RSP=ffff88806cf09a48 R8 =0000000000000002 R9 =0000000000000000 R10=ffff88806cf09a98 R11=0000000000000000 R12=ffff88806cf09ab8 R13=ffff88806cf09ac0 R14=ffff88806cf09ae0 R15=ffff88806cf09a98 RIP=ffffffff81132f0b 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 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=00007f2ddb039710 CR3=000000000c7b0000 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=3715f45c80f6f7a1c040c0a5f5470ab2 XMM02=2c67c8bc2e329bc3000000000011a170 XMM03=fb795ef6d65770560000000000121ab8 XMM04=18991a2cadd79add00000000000ae988 XMM05=59d5b690e0af863b0000000000131928 XMM06=55c033843ab414d40000000000130790 XMM07=e042d86d42eb936e0000000000121d38 XMM08=e1e8019919bff993000000000011a1d0 XMM09=00000000000000000000000000000000 XMM10=20200000000020202020202020200000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000