syzkaller login: [ 30.675047] BUG: Bad rss-counter state mm:0000000004544777 type:MM_FILEPAGES val:33 [ 30.676238] BUG: Bad rss-counter state mm:0000000004544777 type:MM_ANONPAGES val:22 [ 30.715312] ================================================================== [ 30.716265] BUG: KASAN: slab-use-after-free in vma_interval_tree_remove+0xc75/0xec0 [ 30.717288] Read of size 8 at addr ffff888018f12ed8 by task sshd/219 [ 30.718074] [ 30.718293] CPU: 0 PID: 219 Comm: sshd Not tainted 6.4.0-rc7-next-20230620 #1 [ 30.719195] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS 1.12.0-1 04/01/2014 [ 30.720185] Call Trace: [ 30.720519] [ 30.720802] dump_stack_lvl+0x91/0xf0 [ 30.721290] print_report+0xcc/0x620 [ 30.721782] ? __virt_addr_valid+0x102/0x340 [ 30.722331] ? vma_interval_tree_remove+0xc75/0xec0 [ 30.722985] ? vma_interval_tree_remove+0xc75/0xec0 [ 30.723612] kasan_report+0xbe/0xf0 [ 30.724090] ? vma_interval_tree_remove+0xc75/0xec0 [ 30.724717] vma_interval_tree_remove+0xc75/0xec0 [ 30.725329] vma_prepare+0xc54/0x11a0 [ 30.725818] __split_vma+0x5af/0x950 [ 30.726295] ? __pfx___split_vma+0x10/0x10 [ 30.726850] ? find_held_lock+0x2c/0x110 [ 30.727374] do_vmi_align_munmap+0x2ba/0x11f0 [ 30.727956] ? lock_is_held_type+0x9f/0x120 [ 30.728491] ? __pfx_do_vmi_align_munmap+0x10/0x10 [ 30.729111] ? mtree_range_walk+0x632/0x900 [ 30.729677] ? mas_walk+0x5c7/0x7c0 [ 30.730155] do_vmi_munmap+0x1f1/0x2b0 [ 30.730665] mmap_region+0x1f9/0x2660 [ 30.731181] ? vm_mmap_pgoff+0x15c/0x3a0 [ 30.731704] ? __pfx_arch_get_unmapped_area_topdown+0x10/0x10 [ 30.732424] ? __pfx_lock_acquire+0x10/0x10 [ 30.732983] ? __pfx_mmap_region+0x10/0x10 [ 30.733511] ? security_mmap_addr+0x7d/0xa0 [ 30.734055] ? get_unmapped_area+0x1f5/0x3f0 [ 30.734606] do_mmap+0x854/0xf00 [ 30.735066] vm_mmap_pgoff+0x1a6/0x3a0 [ 30.735568] ? __pfx_vm_mmap_pgoff+0x10/0x10 [ 30.736148] ksys_mmap_pgoff+0x3af/0x500 [ 30.736661] do_syscall_64+0x3f/0x90 [ 30.737160] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 30.737823] RIP: 0033:0x7f865b39ed82 [ 30.738282] 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 [ 30.740443] RSP: 002b:00007ffc2117b0f8 EFLAGS: 00000206 ORIG_RAX: 0000000000000009 [ 30.741362] RAX: ffffffffffffffda RBX: 0000000000000812 RCX: 00007f865b39ed82 [ 30.742221] RDX: 0000000000000005 RSI: 0000000000001000 RDI: 00007f865a7d8000 [ 30.743100] RBP: 00007f865a7d8000 R08: 0000000000000009 R09: 0000000000001000 [ 30.743946] R10: 0000000000000812 R11: 0000000000000206 R12: 0000557a2af43f60 [ 30.744788] R13: 00007ffc2117b110 R14: 00007ffc2117b140 R15: 00007ffc2117b4a0 [ 30.745657] [ 30.745958] [ 30.746184] Allocated by task 212: [ 30.746610] kasan_save_stack+0x22/0x50 [ 30.747145] kasan_set_track+0x25/0x30 [ 30.747640] __kasan_slab_alloc+0x59/0x70 [ 30.748175] kmem_cache_alloc+0x16b/0x370 [ 30.748690] vm_area_dup+0x20/0x160 [ 30.749163] __split_vma+0x170/0x950 [ 30.749633] split_vma+0xc6/0x110 [ 30.750081] mprotect_fixup+0x8d2/0xb30 [ 30.750585] do_mprotect_pkey+0x87e/0xd40 [ 30.751141] __x64_sys_mprotect+0x78/0xc0 [ 30.751693] do_syscall_64+0x3f/0x90 [ 30.752205] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 30.752854] [ 30.753079] Freed by task 212: [ 30.753488] kasan_save_stack+0x22/0x50 [ 30.754000] kasan_set_track+0x25/0x30 [ 30.754518] kasan_save_free_info+0x2b/0x50 [ 30.755067] __kasan_slab_free+0x10a/0x190 [ 30.755628] kmem_cache_free+0x10d/0x4d0 [ 30.756139] rcu_core+0x8c8/0x2860 [ 30.756616] __do_softirq+0x1b7/0x7d4 [ 30.757101] [ 30.757330] Last potentially related work creation: [ 30.757923] kasan_save_stack+0x22/0x50 [ 30.758445] __kasan_record_aux_stack+0x8e/0xa0 [ 30.759032] __call_rcu_common.constprop.0+0x6a/0xb90 [ 30.759687] remove_vma+0x139/0x170 [ 30.760140] do_vmi_align_munmap+0xd4a/0x11f0 [ 30.760714] do_vmi_munmap+0x1f1/0x2b0 [ 30.761203] __vm_munmap+0x138/0x3a0 [ 30.761688] __x64_sys_munmap+0x59/0x80 [ 30.762190] do_syscall_64+0x3f/0x90 [ 30.762702] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 30.763365] [ 30.763585] The buggy address belongs to the object at ffff888018f12e80 [ 30.763585] which belongs to the cache vm_area_struct of size 168 [ 30.765093] The buggy address is located 88 bytes inside of [ 30.765093] freed 168-byte region [ffff888018f12e80, ffff888018f12f28) [ 30.766529] [ 30.766760] The buggy address belongs to the physical page: [ 30.767438] page:00000000e811c577 refcount:1 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0x18f12 [ 30.768565] memcg:ffff88800d93f701 [ 30.768992] flags: 0x100000000000200(slab|node=0|zone=1) [ 30.769660] page_type: 0xffffffff() [ 30.770120] raw: 0100000000000200 ffff8880087a0c80 dead000000000122 0000000000000000 [ 30.771075] raw: 0000000000000000 0000000000110011 00000001ffffffff ffff88800d93f701 [ 30.772004] page dumped because: kasan: bad access detected [ 30.772687] [ 30.772909] Memory state around the buggy address: [ 30.773500] ffff888018f12d80: fc fc fc 00 00 00 00 00 00 00 00 00 00 00 00 00 [ 30.774370] ffff888018f12e00: 00 00 00 00 00 00 00 00 fc fc fc fc fc fc fc fc [ 30.775274] >ffff888018f12e80: fa fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb [ 30.776137] ^ [ 30.776888] ffff888018f12f00: fb fb fb fb fb fc fc fc fc fc fc fc fc fc fc fc [ 30.777762] ffff888018f12f80: fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc [ 30.778623] ================================================================== [ 30.779677] Disabling lock debugging due to kernel taint [ 33.188062] BUG: Bad rss-counter state mm:00000000cfa13126 type:MM_FILEPAGES val:33 [ 33.189054] BUG: Bad rss-counter state mm:00000000cfa13126 type:MM_ANONPAGES val:22 [ 33.663101] BUG: Bad rss-counter state mm:00000000a110ce91 type:MM_FILEPAGES val:33 [ 33.663849] BUG: Bad rss-counter state mm:00000000a110ce91 type:MM_ANONPAGES val:22 Warning: Permanently added '[localhost]:2743' (ECDSA) to the list of known hosts. 2023/06/21 01:05:17 fuzzer started 2023/06/21 01:05:17 dialing manager at localhost:36067 2023/06/21 01:05:17 checking machine... 2023/06/21 01:05:17 checking revisions... [ 34.389468] kmemleak: Automatic memory scanning thread ended 2023/06/21 01:05:17 testing simple program... [ 34.437756] cgroup: Unknown subsys name 'net' [ 34.505935] cgroup: Unknown subsys name 'rlimit' executing program executing program executing program VM DIAGNOSIS: 01:05:16 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=00007f6c6c4006c0 CR3=0000000019a0a000 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=2036313a35303a3130203132206e754a XMM01=73732878696e755f6d6170203a5d3832 XMM02=65736f6c63206e6f6973736573203a29 XMM03=755f6d6170203a5d3832325b64687373 XMM04=69662068637573206f4e203a656c6163 XMM05=3a656c696620766e65206e65706f206f XMM06=65733a6468737328766e655f6d617020 XMM07=6b7a79732036313a35303a3130203132 XMM08=3d656e696c646d632022656369767265 XMM09=00000000000000000000000000000000 XMM10=00000000000000000000000000000000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000 info registers vcpu 1 RAX=dffffc0000000000 RBX=ffff888008f7a000 RCX=0000000000000000 RDX=ffffffff85b5e4c8 RSI=ffffffff84905ec0 RDI=ffff8880169668e0 RBP=ffff888016966840 RSP=ffff8880146f7d70 R8 =0000000000000002 R9 =0000000000000000 R10=ffff888016966a53 R11=0000000000000000 R12=ffff888008f7a028 R13=0000000000000000 R14=ffff888016966a68 R15=0000000000000000 RIP=ffffffff812db290 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 00007f1174717900 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=00007ffdb80f3000 CR3=000000001ce7c000 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=ffffffffffffffffffff000000000000 XMM01=000000000000003635006b6f6c6c756e XMM02=62003d73646e756f7200323135616873 XMM03=5320444f4854454d5f54505952434e45 XMM04=40404040404040404040404040404040 XMM05=5a5a5a5a5a5a5a5a5a5a5a5a5a5a5a5a XMM06=20202020202020202020202020202020 XMM07=00000000000000000000000000000000 XMM08=00000000000000000000000000202020 XMM09=ff0000ffffffffffff00000000ffffff XMM10=00000000000000000000000000000000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000