syzkaller login: [ 33.011283] BUG: Bad rss-counter state mm:000000003a47f264 type:MM_FILEPAGES val:33 [ 33.012802] BUG: Bad rss-counter state mm:000000003a47f264 type:MM_ANONPAGES val:22 [ 33.165763] ================================================================== [ 33.166714] BUG: KASAN: slab-use-after-free in vma_interval_tree_remove+0xc75/0xec0 [ 33.167635] Read of size 8 at addr ffff888019f0c310 by task sshd/220 [ 33.168394] [ 33.168614] CPU: 0 PID: 220 Comm: sshd Not tainted 6.4.0-rc7-next-20230619 #1 [ 33.169581] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS 1.12.0-1 04/01/2014 [ 33.170561] Call Trace: [ 33.170880] [ 33.171164] dump_stack_lvl+0x91/0xf0 [ 33.171652] print_report+0xcc/0x620 [ 33.172135] ? __virt_addr_valid+0x102/0x340 [ 33.172692] ? vma_interval_tree_remove+0xc75/0xec0 [ 33.173318] ? vma_interval_tree_remove+0xc75/0xec0 [ 33.173940] kasan_report+0xbe/0xf0 [ 33.174454] ? vma_interval_tree_remove+0xc75/0xec0 [ 33.175069] vma_interval_tree_remove+0xc75/0xec0 [ 33.175673] vma_prepare+0xc54/0x11a0 [ 33.176149] __split_vma+0x5af/0x950 [ 33.176626] ? __pfx___split_vma+0x10/0x10 [ 33.177150] ? find_held_lock+0x2c/0x110 [ 33.177670] do_vmi_align_munmap+0x2ba/0x11f0 [ 33.178245] ? lock_is_held_type+0x9f/0x120 [ 33.178779] ? __pfx_do_vmi_align_munmap+0x10/0x10 [ 33.179380] ? mtree_range_walk+0x632/0x900 [ 33.179926] ? mas_walk+0x5c7/0x7c0 [ 33.180407] do_vmi_munmap+0x1f1/0x2b0 [ 33.180905] mmap_region+0x1f9/0x2660 [ 33.181387] ? vm_mmap_pgoff+0x15c/0x3a0 [ 33.181903] ? __pfx_arch_get_unmapped_area_topdown+0x10/0x10 [ 33.182631] ? __pfx_lock_acquire+0x10/0x10 [ 33.183170] ? __pfx_mmap_region+0x10/0x10 [ 33.183697] ? security_mmap_addr+0x7d/0xa0 [ 33.184230] ? get_unmapped_area+0x1f5/0x3f0 [ 33.184779] do_mmap+0x854/0xf00 [ 33.185217] vm_mmap_pgoff+0x1a6/0x3a0 [ 33.185714] ? __pfx_vm_mmap_pgoff+0x10/0x10 [ 33.186287] ksys_mmap_pgoff+0x3af/0x500 [ 33.186796] do_syscall_64+0x3f/0x90 [ 33.187274] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 33.187915] RIP: 0033:0x7fa682c6fd82 [ 33.188372] 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 [ 33.190498] RSP: 002b:00007ffca7311218 EFLAGS: 00000206 ORIG_RAX: 0000000000000009 [ 33.191390] RAX: ffffffffffffffda RBX: 0000000000000812 RCX: 00007fa682c6fd82 [ 33.192228] RDX: 0000000000000005 RSI: 0000000000001000 RDI: 00007fa6820a9000 [ 33.193075] RBP: 00007fa6820a9000 R08: 0000000000000009 R09: 0000000000001000 [ 33.193923] R10: 0000000000000812 R11: 0000000000000206 R12: 0000560482320b20 [ 33.194792] R13: 00007ffca7311230 R14: 00007ffca7311260 R15: 00007ffca73115c0 [ 33.195640] [ 33.195941] [ 33.196157] Allocated by task 213: [ 33.196587] kasan_save_stack+0x22/0x50 [ 33.197092] kasan_set_track+0x25/0x30 [ 33.197595] __kasan_slab_alloc+0x59/0x70 [ 33.198117] kmem_cache_alloc+0x16b/0x370 [ 33.198636] vm_area_dup+0x20/0x160 [ 33.199093] __split_vma+0x170/0x950 [ 33.199552] split_vma+0xc6/0x110 [ 33.199983] mprotect_fixup+0x8d2/0xb30 [ 33.200489] do_mprotect_pkey+0x87e/0xd40 [ 33.201020] __x64_sys_mprotect+0x78/0xc0 [ 33.201538] do_syscall_64+0x3f/0x90 [ 33.202010] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 33.202667] [ 33.202883] Freed by task 19: [ 33.203278] kasan_save_stack+0x22/0x50 [ 33.203777] kasan_set_track+0x25/0x30 [ 33.204271] kasan_save_free_info+0x2b/0x50 [ 33.204802] __kasan_slab_free+0x10a/0x190 [ 33.205336] kmem_cache_free+0x10d/0x4d0 [ 33.205843] rcu_core+0x8c8/0x2860 [ 33.206294] __do_softirq+0x1b7/0x7d4 [ 33.206767] [ 33.206987] Last potentially related work creation: [ 33.207569] kasan_save_stack+0x22/0x50 [ 33.208072] __kasan_record_aux_stack+0x8e/0xa0 [ 33.208640] __call_rcu_common.constprop.0+0x6a/0xb90 [ 33.209275] remove_vma+0x139/0x170 [ 33.209733] do_vmi_align_munmap+0xd4a/0x11f0 [ 33.210304] do_vmi_munmap+0x1f1/0x2b0 [ 33.210789] __vm_munmap+0x138/0x3a0 [ 33.211253] __x64_sys_munmap+0x59/0x80 [ 33.211749] do_syscall_64+0x3f/0x90 [ 33.212222] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 33.212860] [ 33.213073] The buggy address belongs to the object at ffff888019f0c2b8 [ 33.213073] which belongs to the cache vm_area_struct of size 168 [ 33.214543] The buggy address is located 88 bytes inside of [ 33.214543] freed 168-byte region [ffff888019f0c2b8, ffff888019f0c360) [ 33.215940] [ 33.216153] The buggy address belongs to the physical page: [ 33.216816] page:000000008e84cd42 refcount:1 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0x19f0c [ 33.217894] memcg:ffff88800c69c201 [ 33.218336] flags: 0x100000000000200(slab|node=0|zone=1) [ 33.218978] page_type: 0xffffffff() [ 33.219430] raw: 0100000000000200 ffff88800879fc80 dead000000000122 0000000000000000 [ 33.220352] raw: 0000000000000000 0000000000110011 00000001ffffffff ffff88800c69c201 [ 33.221252] page dumped because: kasan: bad access detected [ 33.221908] [ 33.222124] Memory state around the buggy address: [ 33.222711] ffff888019f0c200: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 fc [ 33.223563] ffff888019f0c280: fc fc fc fc fc fc fc fa fb fb fb fb fb fb fb fb [ 33.224404] >ffff888019f0c300: fb fb fb fb fb fb fb fb fb fb fb fb fc fc fc fc [ 33.225301] ^ [ 33.225799] ffff888019f0c380: fc fc fc fc fa fb fb fb fb fb fb fb fb fb fb fb [ 33.226730] ffff888019f0c400: fb fb fb fb fb fb fb fb fb fc fc fc fc fc fc fc [ 33.227641] ================================================================== [ 33.228777] Disabling lock debugging due to kernel taint [ 35.321700] BUG: Bad rss-counter state mm:00000000d781ca8f type:MM_FILEPAGES val:33 [ 35.322875] BUG: Bad rss-counter state mm:00000000d781ca8f type:MM_ANONPAGES val:22 [ 35.812426] BUG: Bad rss-counter state mm:0000000098e6c0b4 type:MM_FILEPAGES val:33 [ 35.813433] BUG: Bad rss-counter state mm:0000000098e6c0b4 type:MM_ANONPAGES val:22 Warning: Permanently added '[localhost]:48296' (ECDSA) to the list of known hosts. 2023/06/19 10:55:22 fuzzer started 2023/06/19 10:55:23 dialing manager at localhost:44161 2023/06/19 10:55:23 checking machine... 2023/06/19 10:55:23 checking revisions... [ 36.527922] kmemleak: Automatic memory scanning thread ended 2023/06/19 10:55:23 testing simple program... [ 36.588790] cgroup: Unknown subsys name 'net' [ 36.640698] cgroup: Unknown subsys name 'rlimit' executing program executing program executing program VM DIAGNOSIS: 10:55:21 Registers: info registers vcpu 0 RAX=0000000000000001 RBX=ffff88800d388980 RCX=ffff88800d388980 RDX=00000000000d000d RSI=ffff88800d388980 RDI=ffff88800844f780 RBP=ffff888016aef618 RSP=ffff888016aef580 R8 =00000000800d000c R9 =0000000000000000 R10=ffffea000034e200 R11=00000000000d000b R12=ffffea000034e200 R13=0000000000000000 R14=00000000000d000c R15=ffff88800844f780 RIP=ffffffff818094f2 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 00007fa85e027900 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=00007fa85d46d2a0 CR3=000000000c6be000 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=756f6a2f646d65747379732f6e75722f XMM01=00676f6c7379732f6c616e72756f6a2f XMM02=756f6a2f646d65747379732f6e75722f XMM03=006c616e72756f6a2f646d6574737973 XMM04=f9ba6a2521f0662400000000000ae988 XMM05=c4c6d172280004690000000000134c30 XMM06=c291bd5c70af25b90000000000133a20 XMM07=fb795ef6d65770560000000000123fa8 XMM08=4f5453444600273d67736d000d0a0920 XMM09=00000000000000000000000000000000 XMM10=20200000000020202020202020200000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000 info registers vcpu 1 RAX=0000000080000001 RBX=0000000000000000 RCX=ffffffff81621459 RDX=ffff88801027d1c0 RSI=0000000000000000 RDI=0000000000000001 RBP=ffff88800fd8fd90 RSP=ffff88800fd8fbf8 R8 =0000000000000001 R9 =0000000000000000 R10=0000000000000000 R11=0000000000000000 R12=ffffea000069d900 R13=ffff888010173658 R14=ffff88800fd8fdb8 R15=ffffea000069d934 RIP=ffffffff814c07eb 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 =0000 0000000000000000 00000000 00000000 DS =0000 0000000000000000 00000000 00000000 FS =0000 00007fb23e2de900 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=00007fb23e89834c CR3=000000000de7c000 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=6720646572637465733a4d41503d706f 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