syzkaller login: [ 35.585081] BUG: Bad rss-counter state mm:00000000f8fdf1aa type:MM_FILEPAGES val:33 [ 35.587212] BUG: Bad rss-counter state mm:00000000f8fdf1aa type:MM_ANONPAGES val:22 [ 35.746714] ================================================================== [ 35.747713] BUG: KASAN: slab-use-after-free in vma_interval_tree_remove+0xc75/0xec0 [ 35.748742] Read of size 8 at addr ffff8880145293f8 by task sshd/225 [ 35.749737] [ 35.749977] CPU: 1 PID: 225 Comm: sshd Not tainted 6.4.0-rc7-next-20230620 #1 [ 35.750929] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS 1.12.0-1 04/01/2014 [ 35.752020] Call Trace: [ 35.752376] [ 35.752690] dump_stack_lvl+0x91/0xf0 [ 35.753231] print_report+0xcc/0x620 [ 35.753781] ? __virt_addr_valid+0x102/0x340 [ 35.754389] ? vma_interval_tree_remove+0xc75/0xec0 [ 35.755072] ? vma_interval_tree_remove+0xc75/0xec0 [ 35.755758] kasan_report+0xbe/0xf0 [ 35.756286] ? vma_interval_tree_remove+0xc75/0xec0 [ 35.756974] vma_interval_tree_remove+0xc75/0xec0 [ 35.757664] vma_prepare+0xc54/0x11a0 [ 35.758195] __split_vma+0x5af/0x950 [ 35.758717] ? __pfx___split_vma+0x10/0x10 [ 35.759301] ? find_held_lock+0x2c/0x110 [ 35.759878] do_vmi_align_munmap+0x2ba/0x11f0 [ 35.760505] ? lock_is_held_type+0x9f/0x120 [ 35.761103] ? __pfx_do_vmi_align_munmap+0x10/0x10 [ 35.761787] ? mtree_range_walk+0x632/0x900 [ 35.762395] ? mas_walk+0x5c7/0x7c0 [ 35.762923] do_vmi_munmap+0x1f1/0x2b0 [ 35.763465] mmap_region+0x1f9/0x2660 [ 35.764002] ? vm_mmap_pgoff+0x15c/0x3a0 [ 35.764570] ? __pfx_arch_get_unmapped_area_topdown+0x10/0x10 [ 35.765367] ? __pfx_lock_acquire+0x10/0x10 [ 35.765963] ? __pfx_mmap_region+0x10/0x10 [ 35.766545] ? security_mmap_addr+0x7d/0xa0 [ 35.767136] ? get_unmapped_area+0x1f5/0x3f0 [ 35.767744] do_mmap+0x854/0xf00 [ 35.768232] vm_mmap_pgoff+0x1a6/0x3a0 [ 35.768783] ? __pfx_vm_mmap_pgoff+0x10/0x10 [ 35.769403] ksys_mmap_pgoff+0x3af/0x500 [ 35.769989] do_syscall_64+0x3f/0x90 [ 35.770526] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 35.771242] RIP: 0033:0x7f159a91dd82 [ 35.771746] 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 [ 35.774119] RSP: 002b:00007ffd957ab0e8 EFLAGS: 00000206 ORIG_RAX: 0000000000000009 [ 35.775124] RAX: ffffffffffffffda RBX: 0000000000000812 RCX: 00007f159a91dd82 [ 35.776059] RDX: 0000000000000005 RSI: 0000000000001000 RDI: 00007f1599d57000 [ 35.776995] RBP: 00007f1599d57000 R08: 0000000000000009 R09: 0000000000001000 [ 35.777948] R10: 0000000000000812 R11: 0000000000000206 R12: 000056031e2aef60 [ 35.778884] R13: 00007ffd957ab100 R14: 00007ffd957ab130 R15: 00007ffd957ab490 [ 35.779835] [ 35.780162] [ 35.780402] Allocated by task 218: [ 35.780878] kasan_save_stack+0x22/0x50 [ 35.781435] kasan_set_track+0x25/0x30 [ 35.781987] __kasan_slab_alloc+0x59/0x70 [ 35.782547] kmem_cache_alloc+0x16b/0x370 [ 35.783103] vm_area_dup+0x20/0x160 [ 35.783591] __split_vma+0x170/0x950 [ 35.784091] split_vma+0xc6/0x110 [ 35.784557] mprotect_fixup+0x8d2/0xb30 [ 35.785096] do_mprotect_pkey+0x87e/0xd40 [ 35.785656] __x64_sys_mprotect+0x78/0xc0 [ 35.786238] do_syscall_64+0x3f/0x90 [ 35.786748] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 35.787437] [ 35.787665] Freed by task 218: [ 35.788086] kasan_save_stack+0x22/0x50 [ 35.788625] kasan_set_track+0x25/0x30 [ 35.789149] kasan_save_free_info+0x2b/0x50 [ 35.789726] __kasan_slab_free+0x10a/0x190 [ 35.790347] kmem_cache_free+0x10d/0x4d0 [ 35.790909] rcu_core+0x8c8/0x2860 [ 35.791407] __do_softirq+0x1b7/0x7d4 [ 35.791932] [ 35.792164] Last potentially related work creation: [ 35.792800] kasan_save_stack+0x22/0x50 [ 35.793334] __kasan_record_aux_stack+0x8e/0xa0 [ 35.793964] __call_rcu_common.constprop.0+0x6a/0xb90 [ 35.794642] remove_vma+0x139/0x170 [ 35.795121] do_vmi_align_munmap+0xd4a/0x11f0 [ 35.795713] do_vmi_munmap+0x1f1/0x2b0 [ 35.796233] __vm_munmap+0x138/0x3a0 [ 35.796730] __x64_sys_munmap+0x59/0x80 [ 35.797259] do_syscall_64+0x3f/0x90 [ 35.797791] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 35.798489] [ 35.798716] The buggy address belongs to the object at ffff8880145293a0 [ 35.798716] which belongs to the cache vm_area_struct of size 168 [ 35.800300] The buggy address is located 88 bytes inside of [ 35.800300] freed 168-byte region [ffff8880145293a0, ffff888014529448) [ 35.801812] [ 35.802040] The buggy address belongs to the physical page: [ 35.802747] page:00000000b5237bf1 refcount:1 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0x14529 [ 35.803924] memcg:ffff88800ed32f01 [ 35.804375] flags: 0x100000000000200(slab|node=0|zone=1) [ 35.805063] page_type: 0xffffffff() [ 35.805548] raw: 0100000000000200 ffff8880087a0c80 dead000000000122 0000000000000000 [ 35.806546] raw: 0000000000000000 0000000000110011 00000001ffffffff ffff88800ed32f01 [ 35.807530] page dumped because: kasan: bad access detected [ 35.808234] [ 35.808463] Memory state around the buggy address: [ 35.809092] ffff888014529280: fc fc fc fc fc fc fc 00 00 00 00 00 00 00 00 00 [ 35.810009] ffff888014529300: 00 00 00 00 00 00 00 00 00 00 00 00 fc fc fc fc [ 35.810925] >ffff888014529380: fc fc fc fc fa fb fb fb fb fb fb fb fb fb fb fb [ 35.811826] ^ [ 35.812732] ffff888014529400: fb fb fb fb fb fb fb fb fb fc fc fc fc fc fc fc [ 35.813668] ffff888014529480: fc fa fb fb fb fb fb fb fb fb fb fb fb fb fb fb [ 35.814575] ================================================================== [ 35.815575] Disabling lock debugging due to kernel taint [ 37.895238] BUG: Bad rss-counter state mm:00000000c2f4e38c type:MM_FILEPAGES val:33 [ 37.896492] BUG: Bad rss-counter state mm:00000000c2f4e38c type:MM_ANONPAGES val:22 [ 38.316978] BUG: Bad rss-counter state mm:000000007fb6a607 type:MM_FILEPAGES val:32 [ 38.318061] BUG: Bad rss-counter state mm:000000007fb6a607 type:MM_ANONPAGES val:22 Warning: Permanently added '[localhost]:20463' (ECDSA) to the list of known hosts. 2023/06/20 13:52:47 fuzzer started 2023/06/20 13:52:47 dialing manager at localhost:36067 2023/06/20 13:52:48 checking machine... 2023/06/20 13:52:48 checking revisions... [ 39.055235] kmemleak: Automatic memory scanning thread ended 2023/06/20 13:52:48 testing simple program... [ 39.099383] cgroup: Unknown subsys name 'net' [ 39.155845] cgroup: Unknown subsys name 'rlimit' executing program executing program executing program VM DIAGNOSIS: 13:52:47 Registers: info registers vcpu 0 RAX=0000000000000002 RBX=0000000000000001 RCX=ffffffff86138e8c RDX=0000000000000000 RSI=0000000000000001 RDI=0000000000000001 RBP=ffff888008d9f9d0 RSP=ffff888008d9f908 R8 =ffffffff86138e90 R9 =ffff888008d9f9b8 R10=0000000000038001 R11=0000000000020d8f R12=ffff888008d9f9d8 R13=ffff888008d9f9c0 R14=ffff888008d9fcc8 R15=ffff888008d9f978 RIP=ffffffff81130bc1 RFL=00000282 [--S----] 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 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=00007f0ea31db0b0 CR3=0000000016428000 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=32353a3331203032206e754a3e36383c XMM01=7365733a646873732878696e755f6d61 XMM02=736f6c63206e6f6973736573203a296e XMM03=5f6d6170203a5d3433325b6468737320 XMM04=6456774875434142334f726f59427469 XMM05=485320415352203a3268737320303932 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=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=00007fa73f111038 CR3=0000000016428000 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=2037343a32353a3331203032206e754a XMM01=73732878696e755f6d6170203a5d3433 XMM02=65736f6c63206e6f6973736573203a29 XMM03=755f6d6170203a5d3433325b64687373 XMM04=69662068637573206f4e203a656c6163 XMM05=3a656c696620766e65206e65706f206f XMM06=65733a6468737328766e655f6d617020 XMM07=6b7a79732037343a32353a3331203032 XMM08=69767265733d7373616c63742030733a XMM09=00000000000000000000000000000000 XMM10=00000000000000000000000000000000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000