syzkaller login: [ 30.467539] BUG: Bad rss-counter state mm:0000000007ef8518 type:MM_FILEPAGES val:33 [ 30.468528] BUG: Bad rss-counter state mm:0000000007ef8518 type:MM_ANONPAGES val:22 [ 30.644964] ================================================================== [ 30.646150] BUG: KASAN: slab-use-after-free in vma_interval_tree_remove+0xc75/0xec0 [ 30.647281] Read of size 8 at addr ffff88800c732228 by task sshd/219 [ 30.648136] [ 30.648377] CPU: 0 PID: 219 Comm: sshd Not tainted 6.4.0-rc7-next-20230620 #1 [ 30.649374] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS 1.12.0-1 04/01/2014 [ 30.650456] Call Trace: [ 30.650814] [ 30.651134] dump_stack_lvl+0x91/0xf0 [ 30.651688] print_report+0xcc/0x620 [ 30.652235] ? __virt_addr_valid+0x102/0x340 [ 30.652849] ? vma_interval_tree_remove+0xc75/0xec0 [ 30.653557] ? vma_interval_tree_remove+0xc75/0xec0 [ 30.654245] kasan_report+0xbe/0xf0 [ 30.654780] ? vma_interval_tree_remove+0xc75/0xec0 [ 30.655477] vma_interval_tree_remove+0xc75/0xec0 [ 30.656150] vma_prepare+0xc54/0x11a0 [ 30.656688] __split_vma+0x5af/0x950 [ 30.657240] ? __pfx___split_vma+0x10/0x10 [ 30.657836] ? find_held_lock+0x2c/0x110 [ 30.658429] do_vmi_align_munmap+0x2ba/0x11f0 [ 30.659064] ? lock_is_held_type+0x9f/0x120 [ 30.659666] ? __pfx_do_vmi_align_munmap+0x10/0x10 [ 30.660338] ? mtree_range_walk+0x632/0x900 [ 30.660956] ? mas_walk+0x5c7/0x7c0 [ 30.661542] do_vmi_munmap+0x1f1/0x2b0 [ 30.662137] mmap_region+0x1f9/0x2660 [ 30.662719] ? vm_mmap_pgoff+0x15c/0x3a0 [ 30.663339] ? __pfx_arch_get_unmapped_area_topdown+0x10/0x10 [ 30.664197] ? __pfx_lock_acquire+0x10/0x10 [ 30.664838] ? __pfx_mmap_region+0x10/0x10 [ 30.665501] ? security_mmap_addr+0x7d/0xa0 [ 30.666143] ? get_unmapped_area+0x1f5/0x3f0 [ 30.666807] do_mmap+0x854/0xf00 [ 30.667339] vm_mmap_pgoff+0x1a6/0x3a0 [ 30.667937] ? __pfx_vm_mmap_pgoff+0x10/0x10 [ 30.668612] ksys_mmap_pgoff+0x3af/0x500 [ 30.669239] do_syscall_64+0x3f/0x90 [ 30.669811] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 30.670587] RIP: 0033:0x7f0f075e4d82 [ 30.671122] 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 [ 30.673671] RSP: 002b:00007fff09e53da8 EFLAGS: 00000206 ORIG_RAX: 0000000000000009 [ 30.674737] RAX: ffffffffffffffda RBX: 0000000000000812 RCX: 00007f0f075e4d82 [ 30.675737] RDX: 0000000000000005 RSI: 0000000000001000 RDI: 00007f0f06a1e000 [ 30.676725] RBP: 00007f0f06a1e000 R08: 0000000000000009 R09: 0000000000001000 [ 30.677730] R10: 0000000000000812 R11: 0000000000000206 R12: 0000555dc7274b20 [ 30.678710] R13: 00007fff09e53dc0 R14: 00007fff09e53df0 R15: 00007fff09e54150 [ 30.679695] [ 30.680029] [ 30.680275] Allocated by task 212: [ 30.680766] kasan_save_stack+0x22/0x50 [ 30.681344] kasan_set_track+0x25/0x30 [ 30.681904] __kasan_slab_alloc+0x59/0x70 [ 30.682498] kmem_cache_alloc+0x16b/0x370 [ 30.683075] vm_area_dup+0x20/0x160 [ 30.683587] __split_vma+0x170/0x950 [ 30.684110] split_vma+0xc6/0x110 [ 30.684609] mprotect_fixup+0x8d2/0xb30 [ 30.685198] do_mprotect_pkey+0x87e/0xd40 [ 30.685793] __x64_sys_mprotect+0x78/0xc0 [ 30.686379] do_syscall_64+0x3f/0x90 [ 30.686930] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 30.687659] [ 30.687902] Freed by task 212: [ 30.688345] kasan_save_stack+0x22/0x50 [ 30.688923] kasan_set_track+0x25/0x30 [ 30.689493] kasan_save_free_info+0x2b/0x50 [ 30.690096] __kasan_slab_free+0x10a/0x190 [ 30.690699] kmem_cache_free+0x10d/0x4d0 [ 30.691278] rcu_core+0x8c8/0x2860 [ 30.691771] __do_softirq+0x1b7/0x7d4 [ 30.692318] [ 30.692559] Last potentially related work creation: [ 30.693249] kasan_save_stack+0x22/0x50 [ 30.693820] __kasan_record_aux_stack+0x8e/0xa0 [ 30.694480] __call_rcu_common.constprop.0+0x6a/0xb90 [ 30.695209] remove_vma+0x139/0x170 [ 30.695723] do_vmi_align_munmap+0xd4a/0x11f0 [ 30.696364] do_vmi_munmap+0x1f1/0x2b0 [ 30.696917] __vm_munmap+0x138/0x3a0 [ 30.697466] __x64_sys_munmap+0x59/0x80 [ 30.698036] do_syscall_64+0x3f/0x90 [ 30.698576] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 30.699307] [ 30.699547] The buggy address belongs to the object at ffff88800c7321d0 [ 30.699547] which belongs to the cache vm_area_struct of size 168 [ 30.701228] The buggy address is located 88 bytes inside of [ 30.701228] freed 168-byte region [ffff88800c7321d0, ffff88800c732278) [ 30.702827] [ 30.703073] The buggy address belongs to the physical page: [ 30.703818] page:00000000c2b111c9 refcount:1 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0xc732 [ 30.705058] memcg:ffff88800e723701 [ 30.705550] flags: 0x100000000000200(slab|node=0|zone=1) [ 30.706292] page_type: 0xffffffff() [ 30.706806] raw: 0100000000000200 ffff8880087a0c80 ffffea000060a5c0 dead000000000008 [ 30.707856] raw: 0000000000000000 0000000000110011 00000001ffffffff ffff88800e723701 [ 30.708883] page dumped because: kasan: bad access detected [ 30.709643] [ 30.709891] Memory state around the buggy address: [ 30.710553] ffff88800c732100: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 [ 30.711522] ffff88800c732180: 00 00 fc fc fc fc fc fc fc fc fa fb fb fb fb fb [ 30.712483] >ffff88800c732200: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fc [ 30.713465] ^ [ 30.714096] ffff88800c732280: fc fc fc fc fc fc fc fa fb fb fb fb fb fb fb fb [ 30.715065] ffff88800c732300: fb fb fb fb fb fb fb fb fb fb fb fb fc fc fc fc [ 30.716036] ================================================================== [ 30.717140] Disabling lock debugging due to kernel taint [ 32.735316] BUG: Bad rss-counter state mm:00000000b2bb35ed type:MM_FILEPAGES val:33 [ 32.736121] BUG: Bad rss-counter state mm:00000000b2bb35ed type:MM_ANONPAGES val:22 [ 33.162751] BUG: Bad rss-counter state mm:0000000045f1f9c2 type:MM_FILEPAGES val:33 [ 33.164048] BUG: Bad rss-counter state mm:0000000045f1f9c2 type:MM_ANONPAGES val:22 Warning: Permanently added '[localhost]:61201' (ECDSA) to the list of known hosts. 2023/06/21 04:03:54 fuzzer started 2023/06/21 04:03:54 dialing manager at localhost:36067 2023/06/21 04:03:54 checking machine... 2023/06/21 04:03:54 checking revisions... [ 33.841646] kmemleak: Automatic memory scanning thread ended 2023/06/21 04:03:54 testing simple program... [ 33.896798] cgroup: Unknown subsys name 'net' [ 33.936843] cgroup: Unknown subsys name 'rlimit' executing program executing program executing program VM DIAGNOSIS: 04:03:54 Registers: info registers vcpu 0 RAX=0000000000000020 RBX=ffff88800caafc01 RCX=0000000000000000 RDX=ffff888018d31b40 RSI=ffffffff849af6c0 RDI=0000000000000000 RBP=ffffffff849af6c0 RSP=ffff88801c9dfd30 R8 =0000000000000007 R9 =0000000000000000 R10=0000000000000000 R11=0000000000000001 R12=0000000000000000 R13=0000000000000003 R14=0000000000000000 R15=ffffed10031a645e RIP=ffffffff814c0476 RFL=00000293 [--S-A-C] 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 00007f9ec3c7d900 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=00007f9ec3c3101c CR3=000000000d676000 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=ffffffff00ffffffffffffffffffffff XMM01=707465675f6c697475646f6d6d61705f XMM02=ff000000000000ff0000000000ff0000 XMM03=66207463656e6e6f6373696420646576 XMM04=00000000000000000000000000000000 XMM05=00000000000000000000000000000000 XMM06=0d0c0f0e09080b0a0504070601000302 XMM07=00000000000000000000000000000000 XMM08=000a0d732a2e25006c61746166003367 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=00007fffc8f7cce8 CR3=000000000eb94000 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=2034353a33303a3430203132206e754a XMM01=657463656e6e6f63736944203a5d3832 XMM02=302e303120746f6f722072657375206d XMM03=203a5d3832325b646873732072656c6c XMM04=69662068637573206f4e203a656c6163 XMM05=3a656c696620766e65206e65706f206f XMM06=65733a6468737328766e655f6d617020 XMM07=6b7a79732034353a33303a3430203132 XMM08=3d656e696c646d632022656369767265 XMM09=00000000000000000000000000000000 XMM10=00000000000000000000000000000000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000