syzkaller login: [ 32.240596] BUG: Bad rss-counter state mm:000000009f7c00ff type:MM_FILEPAGES val:33 [ 32.241596] BUG: Bad rss-counter state mm:000000009f7c00ff type:MM_ANONPAGES val:22 [ 32.400559] ================================================================== [ 32.401478] BUG: KASAN: slab-use-after-free in vma_interval_tree_remove+0xc75/0xec0 [ 32.402413] Read of size 8 at addr ffff88800d28edf0 by task sshd/220 [ 32.403177] [ 32.403396] CPU: 1 PID: 220 Comm: sshd Not tainted 6.4.0-rc7-next-20230619 #1 [ 32.404410] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS 1.12.0-1 04/01/2014 [ 32.405404] Call Trace: [ 32.405723] [ 32.406011] dump_stack_lvl+0x91/0xf0 [ 32.406512] print_report+0xcc/0x620 [ 32.406998] ? __virt_addr_valid+0x102/0x340 [ 32.407546] ? vma_interval_tree_remove+0xc75/0xec0 [ 32.408161] ? vma_interval_tree_remove+0xc75/0xec0 [ 32.408791] kasan_report+0xbe/0xf0 [ 32.409265] ? vma_interval_tree_remove+0xc75/0xec0 [ 32.409885] vma_interval_tree_remove+0xc75/0xec0 [ 32.410489] vma_prepare+0xc54/0x11a0 [ 32.410972] __split_vma+0x5af/0x950 [ 32.411443] ? __pfx___split_vma+0x10/0x10 [ 32.411972] ? find_held_lock+0x2c/0x110 [ 32.412520] do_vmi_align_munmap+0x2ba/0x11f0 [ 32.413087] ? lock_is_held_type+0x9f/0x120 [ 32.413623] ? __pfx_do_vmi_align_munmap+0x10/0x10 [ 32.414224] ? mtree_range_walk+0x632/0x900 [ 32.414773] ? mas_walk+0x5c7/0x7c0 [ 32.415244] do_vmi_munmap+0x1f1/0x2b0 [ 32.415739] mmap_region+0x1f9/0x2660 [ 32.416222] ? vm_mmap_pgoff+0x15c/0x3a0 [ 32.416750] ? __pfx_arch_get_unmapped_area_topdown+0x10/0x10 [ 32.417466] ? __pfx_lock_acquire+0x10/0x10 [ 32.417997] ? __pfx_mmap_region+0x10/0x10 [ 32.418527] ? security_mmap_addr+0x7d/0xa0 [ 32.419061] ? get_unmapped_area+0x1f5/0x3f0 [ 32.419611] do_mmap+0x854/0xf00 [ 32.420047] vm_mmap_pgoff+0x1a6/0x3a0 [ 32.420547] ? __pfx_vm_mmap_pgoff+0x10/0x10 [ 32.421106] ksys_mmap_pgoff+0x3af/0x500 [ 32.421611] do_syscall_64+0x3f/0x90 [ 32.422086] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 32.422726] RIP: 0033:0x7f668c29dd82 [ 32.423183] 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 [ 32.425337] RSP: 002b:00007ffd5d8c9d48 EFLAGS: 00000206 ORIG_RAX: 0000000000000009 [ 32.426244] RAX: ffffffffffffffda RBX: 0000000000000812 RCX: 00007f668c29dd82 [ 32.427098] RDX: 0000000000000005 RSI: 0000000000001000 RDI: 00007f668b6d7000 [ 32.427947] RBP: 00007f668b6d7000 R08: 0000000000000009 R09: 0000000000001000 [ 32.428800] R10: 0000000000000812 R11: 0000000000000206 R12: 0000564724b22ec0 [ 32.429672] R13: 00007ffd5d8c9d60 R14: 00007ffd5d8c9d90 R15: 00007ffd5d8ca0f0 [ 32.430557] [ 32.430864] [ 32.431079] Allocated by task 213: [ 32.431521] kasan_save_stack+0x22/0x50 [ 32.432046] kasan_set_track+0x25/0x30 [ 32.432582] __kasan_slab_alloc+0x59/0x70 [ 32.433123] kmem_cache_alloc+0x16b/0x370 [ 32.433660] vm_area_dup+0x20/0x160 [ 32.434126] __split_vma+0x170/0x950 [ 32.434605] split_vma+0xc6/0x110 [ 32.435050] mprotect_fixup+0x8d2/0xb30 [ 32.435551] do_mprotect_pkey+0x87e/0xd40 [ 32.436072] __x64_sys_mprotect+0x78/0xc0 [ 32.436618] do_syscall_64+0x3f/0x90 [ 32.437102] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 32.437753] [ 32.437974] Freed by task 213: [ 32.438394] kasan_save_stack+0x22/0x50 [ 32.438903] kasan_set_track+0x25/0x30 [ 32.439407] kasan_save_free_info+0x2b/0x50 [ 32.439959] __kasan_slab_free+0x10a/0x190 [ 32.440525] kmem_cache_free+0x10d/0x4d0 [ 32.441041] rcu_core+0x8c8/0x2860 [ 32.441506] __do_softirq+0x1b7/0x7d4 [ 32.441987] [ 32.442206] Last potentially related work creation: [ 32.442796] kasan_save_stack+0x22/0x50 [ 32.443308] __kasan_record_aux_stack+0x8e/0xa0 [ 32.443895] __call_rcu_common.constprop.0+0x6a/0xb90 [ 32.444556] remove_vma+0x139/0x170 [ 32.445075] do_vmi_align_munmap+0xd4a/0x11f0 [ 32.445644] do_vmi_munmap+0x1f1/0x2b0 [ 32.446136] __vm_munmap+0x138/0x3a0 [ 32.446604] __x64_sys_munmap+0x59/0x80 [ 32.447110] do_syscall_64+0x3f/0x90 [ 32.447588] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 32.448235] [ 32.448464] The buggy address belongs to the object at ffff88800d28ed98 [ 32.448464] which belongs to the cache vm_area_struct of size 168 [ 32.449964] The buggy address is located 88 bytes inside of [ 32.449964] freed 168-byte region [ffff88800d28ed98, ffff88800d28ee40) [ 32.451390] [ 32.451611] The buggy address belongs to the physical page: [ 32.452292] page:000000007599a2ae refcount:1 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0xd28e [ 32.453408] memcg:ffff888016f4b701 [ 32.453954] flags: 0x100000000000200(slab|node=0|zone=1) [ 32.454805] page_type: 0xffffffff() [ 32.455287] raw: 0100000000000200 ffff88800879fc80 dead000000000122 0000000000000000 [ 32.456269] raw: 0000000000000000 0000000000110011 00000001ffffffff ffff888016f4b701 [ 32.457192] page dumped because: kasan: bad access detected [ 32.457887] [ 32.458107] Memory state around the buggy address: [ 32.458718] ffff88800d28ec80: fc fc fc fc fc fc 00 00 00 00 00 00 00 00 00 00 [ 32.459620] ffff88800d28ed00: 00 00 00 00 00 00 00 00 00 00 00 fc fc fc fc fc [ 32.460495] >ffff88800d28ed80: fc fc fc fa fb fb fb fb fb fb fb fb fb fb fb fb [ 32.461355] ^ [ 32.462189] ffff88800d28ee00: fb fb fb fb fb fb fb fb fc fc fc fc fc fc fc fc [ 32.463056] ffff88800d28ee80: fa fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb [ 32.463925] ================================================================== [ 32.464968] Disabling lock debugging due to kernel taint [ 34.440210] BUG: Bad rss-counter state mm:000000003a2d11ae type:MM_FILEPAGES val:33 [ 34.441120] BUG: Bad rss-counter state mm:000000003a2d11ae type:MM_ANONPAGES val:22 [ 34.862801] BUG: Bad rss-counter state mm:0000000019d9beb3 type:MM_FILEPAGES val:33 [ 34.863494] BUG: Bad rss-counter state mm:0000000019d9beb3 type:MM_ANONPAGES val:22 Warning: Permanently added '[localhost]:52563' (ECDSA) to the list of known hosts. 2023/06/19 21:06:09 fuzzer started 2023/06/19 21:06:09 dialing manager at localhost:44161 2023/06/19 21:06:09 checking machine... 2023/06/19 21:06:09 checking revisions... [ 35.526518] kmemleak: Automatic memory scanning thread ended 2023/06/19 21:06:09 testing simple program... [ 35.581340] cgroup: Unknown subsys name 'net' [ 35.611905] cgroup: Unknown subsys name 'rlimit' executing program executing program executing program VM DIAGNOSIS: 21:06:08 Registers: info registers vcpu 0 RAX=1ffffffff0c969e7 RBX=0000000000000002 RCX=ffffffff864b4f38 RDX=dffffc0000000000 RSI=0000000000000000 RDI=0000000000000001 RBP=ffff88806ce09ad0 RSP=ffff88806ce09a08 R8 =ffffffff864b4f3c R9 =ffff88806ce09ab8 R10=0000000000038001 R11=00000000000b5c92 R12=ffff88806ce09ad8 R13=ffff88806ce09ac0 R14=ffff88806ce09f80 R15=ffff88806ce09a78 RIP=ffffffff81130b73 RFL=00000216 [----AP-] 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 00007f3f2905d900 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=00007ffc239b0000 CR3=000000000e088000 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=635f6e6f69737365733a4d41503d706f XMM01=6f6c5f6d61702c78756e696c65735f6d XMM02=61702c74696d7265705f6d61702c7469 XMM03=655f6d61702c7374696d696c5f6d6170 XMM04=3d6c616e696d72657420322e322e302e XMM05=3d656d616e74736f682022646873732f XMM06=746f6f72223d746363612078756e696c XMM07=6e655f6d61702c7374696d696c5f6d61 XMM08=652075253d64692073253d706f000000 XMM09=00000000000000000000000000000000 XMM10=00000000000000000000000000000000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000 info registers vcpu 1 RAX=ffff88806cf35000 RBX=0000000000000001 RCX=ffffffff8450c50e RDX=ffffed100d9e6a01 RSI=0000000000000004 RDI=ffffffff812889a5 RBP=dffffc0000000000 RSP=ffff888008e27e70 R8 =0000000000000000 R9 =ffffed100d9e6a00 R10=ffff88806cf35003 R11=0000000000000001 R12=ffffffff85d3bed0 R13=1ffff110011c4fd3 R14=0000000000000000 R15=0000000000000000 RIP=ffffffff8450d49f 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=00007f10e128d800 CR3=0000000019410000 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=36303a3132203931206e754a3e36383c XMM01=7365733a646873732878696e755f6d61 XMM02=736f6c63206e6f6973736573203a296e XMM03=5f6d6170203a5d3932325b6468737320 XMM04=6456774875434142334f726f59427469 XMM05=485320415352203a3268737320303031 XMM06=206d6f726620746f6f7220726f662079 XMM07=00000000000000000000000000000000 XMM08=3a677562656420676f6c737973720000 XMM09=00000000000000000000000000000000 XMM10=00000000000000000000000000000000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000