syzkaller login: [ 60.181692] BUG: Bad rss-counter state mm:00000000c6ac922c type:MM_FILEPAGES val:33 [ 60.182971] BUG: Bad rss-counter state mm:00000000c6ac922c type:MM_ANONPAGES val:22 [ 60.318803] ================================================================== [ 60.319889] BUG: KASAN: slab-use-after-free in vma_interval_tree_remove+0xc75/0xec0 [ 60.321005] Read of size 8 at addr ffff88800e527880 by task sshd/221 [ 60.321968] [ 60.322133] CPU: 1 PID: 221 Comm: sshd Not tainted 6.4.0-rc7-next-20230620 #1 [ 60.322791] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS 1.12.0-1 04/01/2014 [ 60.323564] Call Trace: [ 60.323818] [ 60.324037] dump_stack_lvl+0x91/0xf0 [ 60.324410] print_report+0xcc/0x620 [ 60.324782] ? __virt_addr_valid+0x102/0x340 [ 60.325206] ? vma_interval_tree_remove+0xc75/0xec0 [ 60.325681] ? vma_interval_tree_remove+0xc75/0xec0 [ 60.326154] kasan_report+0xbe/0xf0 [ 60.326520] ? vma_interval_tree_remove+0xc75/0xec0 [ 60.327008] vma_interval_tree_remove+0xc75/0xec0 [ 60.327471] vma_prepare+0xc54/0x11a0 [ 60.327845] __split_vma+0x5af/0x950 [ 60.328206] ? __pfx___split_vma+0x10/0x10 [ 60.328615] ? find_held_lock+0x2c/0x110 [ 60.329019] do_vmi_align_munmap+0x2ba/0x11f0 [ 60.329453] ? lock_is_held_type+0x9f/0x120 [ 60.329868] ? __pfx_do_vmi_align_munmap+0x10/0x10 [ 60.330333] ? mtree_range_walk+0x632/0x900 [ 60.330763] ? mas_walk+0x5c7/0x7c0 [ 60.331146] do_vmi_munmap+0x1f1/0x2b0 [ 60.331529] mmap_region+0x1f9/0x2660 [ 60.331904] ? vm_mmap_pgoff+0x15c/0x3a0 [ 60.332298] ? __pfx_arch_get_unmapped_area_topdown+0x10/0x10 [ 60.332852] ? __pfx_lock_acquire+0x10/0x10 [ 60.333262] ? __pfx_mmap_region+0x10/0x10 [ 60.333673] ? security_mmap_addr+0x7d/0xa0 [ 60.334089] ? get_unmapped_area+0x1f5/0x3f0 [ 60.334513] do_mmap+0x854/0xf00 [ 60.334854] vm_mmap_pgoff+0x1a6/0x3a0 [ 60.335245] ? __pfx_vm_mmap_pgoff+0x10/0x10 [ 60.335678] ksys_mmap_pgoff+0x3af/0x500 [ 60.336071] do_syscall_64+0x3f/0x90 [ 60.336436] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 60.336940] RIP: 0033:0x7f5103471d82 [ 60.337296] 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 [ 60.338986] RSP: 002b:00007fff5540c138 EFLAGS: 00000206 ORIG_RAX: 0000000000000009 [ 60.339685] RAX: ffffffffffffffda RBX: 0000000000000812 RCX: 00007f5103471d82 [ 60.340339] RDX: 0000000000000005 RSI: 0000000000001000 RDI: 00007f51028ab000 [ 60.340985] RBP: 00007f51028ab000 R08: 0000000000000009 R09: 0000000000001000 [ 60.341631] R10: 0000000000000812 R11: 0000000000000206 R12: 0000564da278aec0 [ 60.342292] R13: 00007fff5540c150 R14: 00007fff5540c180 R15: 00007fff5540c4e0 [ 60.342965] [ 60.343186] [ 60.343353] Allocated by task 214: [ 60.343682] kasan_save_stack+0x22/0x50 [ 60.344067] kasan_set_track+0x25/0x30 [ 60.344443] __kasan_slab_alloc+0x59/0x70 [ 60.344844] kmem_cache_alloc+0x16b/0x370 [ 60.345235] vm_area_dup+0x20/0x160 [ 60.345583] __split_vma+0x170/0x950 [ 60.345938] split_vma+0xc6/0x110 [ 60.346270] mprotect_fixup+0x8d2/0xb30 [ 60.346658] do_mprotect_pkey+0x87e/0xd40 [ 60.347074] __x64_sys_mprotect+0x78/0xc0 [ 60.347473] do_syscall_64+0x3f/0x90 [ 60.347836] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 60.348329] [ 60.348493] Freed by task 104: [ 60.348795] kasan_save_stack+0x22/0x50 [ 60.349176] kasan_set_track+0x25/0x30 [ 60.349558] kasan_save_free_info+0x2b/0x50 [ 60.349968] __kasan_slab_free+0x10a/0x190 [ 60.350378] kmem_cache_free+0x10d/0x4d0 [ 60.350769] rcu_core+0x8c8/0x2860 [ 60.351118] __do_softirq+0x1b7/0x7d4 [ 60.351487] [ 60.351651] Last potentially related work creation: [ 60.352105] kasan_save_stack+0x22/0x50 [ 60.352495] __kasan_record_aux_stack+0x8e/0xa0 [ 60.352941] __call_rcu_common.constprop.0+0x6a/0xb90 [ 60.353461] remove_vma+0x139/0x170 [ 60.353806] do_vmi_align_munmap+0xd4a/0x11f0 [ 60.354238] do_vmi_munmap+0x1f1/0x2b0 [ 60.354608] __vm_munmap+0x138/0x3a0 [ 60.354973] __x64_sys_munmap+0x59/0x80 [ 60.355348] do_syscall_64+0x3f/0x90 [ 60.355710] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 60.356202] [ 60.356364] The buggy address belongs to the object at ffff88800e527828 [ 60.356364] which belongs to the cache vm_area_struct of size 168 [ 60.357489] The buggy address is located 88 bytes inside of [ 60.357489] freed 168-byte region [ffff88800e527828, ffff88800e5278d0) [ 60.358563] [ 60.358728] The buggy address belongs to the physical page: [ 60.359251] page:00000000bd0d8555 refcount:1 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0xe527 [ 60.360073] memcg:ffff88800d004901 [ 60.360397] anon flags: 0x100000000000200(slab|node=0|zone=1) [ 60.360935] page_type: 0xffffffff() [ 60.361277] raw: 0100000000000200 ffff8880087a0c80 ffffea00002e5cc0 dead000000000005 [ 60.361986] raw: 0000000000000000 0000000000110011 00000001ffffffff ffff88800d004901 [ 60.362751] page dumped because: kasan: bad access detected [ 60.363268] [ 60.363434] Memory state around the buggy address: [ 60.363882] ffff88800e527780: 00 00 00 00 00 00 00 00 00 00 00 00 00 fc fc fc [ 60.364547] ffff88800e527800: fc fc fc fc fc fa fb fb fb fb fb fb fb fb fb fb [ 60.365214] >ffff88800e527880: fb fb fb fb fb fb fb fb fb fb fc fc fc fc fc fc [ 60.365884] ^ [ 60.366186] ffff88800e527900: fc fc fa fb fb fb fb fb fb fb fb fb fb fb fb fb [ 60.366816] ffff88800e527980: fb fb fb fb fb fb fb fc fc fc fc fc fc fc fc fa [ 60.367453] ================================================================== [ 60.368194] Disabling lock debugging due to kernel taint [ 62.395133] BUG: Bad rss-counter state mm:00000000c11e8a82 type:MM_FILEPAGES val:33 [ 62.396275] BUG: Bad rss-counter state mm:00000000c11e8a82 type:MM_ANONPAGES val:22 [ 62.901308] BUG: Bad rss-counter state mm:000000000c9483c5 type:MM_FILEPAGES val:33 [ 62.902487] BUG: Bad rss-counter state mm:000000000c9483c5 type:MM_ANONPAGES val:22 Warning: Permanently added '[localhost]:59633' (ECDSA) to the list of known hosts. 2023/06/20 22:27:19 fuzzer started 2023/06/20 22:27:19 dialing manager at localhost:36067 2023/06/20 22:27:19 checking machine... 2023/06/20 22:27:19 checking revisions... [ 63.528040] kmemleak: Automatic memory scanning thread ended 2023/06/20 22:27:19 testing simple program... [ 63.569931] cgroup: Unknown subsys name 'net' [ 63.624041] cgroup: Unknown subsys name 'rlimit' executing program executing program executing program VM DIAGNOSIS: 22:27:18 Registers: info registers vcpu 0 RAX=1ffff11001bfb38f RBX=ffff88800dfd9c48 RCX=ffffffff812e0135 RDX=0000000000000000 RSI=0000000000000000 RDI=ffff88800dfd9c78 RBP=ffff88800e88c000 RSP=ffff888008d9fc98 R8 =0000000000000001 R9 =ffffed10011b3f87 R10=0000000000000003 R11=0000000000000128 R12=dffffc0000000000 R13=ffff88800e881900 R14=ffffffff8186b835 R15=ffff88800d0e3480 RIP=ffffffff818464e2 RFL=00000046 [---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 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=00007ffc0dbc4e98 CR3=000000000c54e000 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=2038313a37323a3232203032206e754a XMM01=657463656e6e6f63736944203a5d3033 XMM02=302e303120746f6f722072657375206d XMM03=203a5d3033325b646873732072656c6c XMM04=69662068637573206f4e203a656c6163 XMM05=3a656c696620766e65206e65706f206f XMM06=65733a6468737328766e655f6d617020 XMM07=6b7a79732038313a37323a3232203032 XMM08=3d656e696c646d632022656369767265 XMM09=00000000000000000000000000000000 XMM10=00000000000000000000000000000000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000 info registers vcpu 1 RAX=1ffff11001882613 RBX=ffff88800c413068 RCX=ffffffff812e0135 RDX=0000000000000000 RSI=0000000000000000 RDI=ffff88800c413098 RBP=ffff88800ec62a00 RSP=ffff888008e37c98 R8 =0000000000000001 R9 =ffffed10011c6f87 R10=0000000000000003 R11=0000000000000128 R12=dffffc0000000000 R13=ffff88800ebc4c80 R14=ffffffff8186b835 R15=ffff88800db05b00 RIP=ffffffff818464e2 RFL=00000046 [---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 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=00007f2b1f90c650 CR3=000000000c930000 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=00000000000000000000000000000000 XMM01=000000000000000000000000000000ff XMM02=000000000000000000000000000000ff XMM03=5320444f4854454d5f54505952434e45 XMM04=40404040404040404040404040404040 XMM05=5a5a5a5a5a5a5a5a5a5a5a5a5a5a5a5a XMM06=20202020202020202020202020202020 XMM07=00000000000000000000000000000000 XMM08=ffbc64ffffbc44ffffbc34ffffbc9f00 XMM09=00000000000000000000000000000000 XMM10=00000000000000000000000000000000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000