syzkaller login: [ 30.922893] BUG: Bad rss-counter state mm:000000006b02d2ef type:MM_FILEPAGES val:33 [ 30.923655] BUG: Bad rss-counter state mm:000000006b02d2ef type:MM_ANONPAGES val:22 [ 31.057265] ================================================================== [ 31.057981] BUG: KASAN: slab-use-after-free in vma_interval_tree_remove+0xc75/0xec0 [ 31.058662] Read of size 8 at addr ffff88800c630798 by task sshd/221 [ 31.059229] [ 31.059383] CPU: 1 PID: 221 Comm: sshd Not tainted 6.4.0-rc7-next-20230620 #1 [ 31.060008] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS 1.12.0-1 04/01/2014 [ 31.060698] Call Trace: [ 31.060927] [ 31.061125] dump_stack_lvl+0x91/0xf0 [ 31.061632] print_report+0xcc/0x620 [ 31.061999] ? __virt_addr_valid+0x102/0x340 [ 31.062400] ? vma_interval_tree_remove+0xc75/0xec0 [ 31.062826] ? vma_interval_tree_remove+0xc75/0xec0 [ 31.063260] kasan_report+0xbe/0xf0 [ 31.063580] ? vma_interval_tree_remove+0xc75/0xec0 [ 31.064148] vma_interval_tree_remove+0xc75/0xec0 [ 31.064574] vma_prepare+0xc54/0x11a0 [ 31.064917] __split_vma+0x5af/0x950 [ 31.065270] ? __pfx___split_vma+0x10/0x10 [ 31.065660] ? find_held_lock+0x2c/0x110 [ 31.066032] do_vmi_align_munmap+0x2ba/0x11f0 [ 31.066429] ? lock_is_held_type+0x9f/0x120 [ 31.066813] ? __pfx_do_vmi_align_munmap+0x10/0x10 [ 31.067220] ? mtree_range_walk+0x632/0x900 [ 31.067592] ? mas_walk+0x5c7/0x7c0 [ 31.067946] do_vmi_munmap+0x1f1/0x2b0 [ 31.068286] mmap_region+0x1f9/0x2660 [ 31.068629] ? vm_mmap_pgoff+0x15c/0x3a0 [ 31.068996] ? __pfx_arch_get_unmapped_area_topdown+0x10/0x10 [ 31.069510] ? __pfx_lock_acquire+0x10/0x10 [ 31.069879] ? __pfx_mmap_region+0x10/0x10 [ 31.070239] ? security_mmap_addr+0x7d/0xa0 [ 31.070592] ? get_unmapped_area+0x1f5/0x3f0 [ 31.070969] do_mmap+0x854/0xf00 [ 31.071274] vm_mmap_pgoff+0x1a6/0x3a0 [ 31.071617] ? __pfx_vm_mmap_pgoff+0x10/0x10 [ 31.072027] ksys_mmap_pgoff+0x3af/0x500 [ 31.072373] do_syscall_64+0x3f/0x90 [ 31.072690] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 31.073127] RIP: 0033:0x7f3dde002d82 [ 31.073440] 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 [ 31.074896] RSP: 002b:00007fff7f0ffc08 EFLAGS: 00000206 ORIG_RAX: 0000000000000009 [ 31.075497] RAX: ffffffffffffffda RBX: 0000000000000812 RCX: 00007f3dde002d82 [ 31.076135] RDX: 0000000000000005 RSI: 0000000000001000 RDI: 00007f3ddd43c000 [ 31.076603] RBP: 00007f3ddd43c000 R08: 0000000000000009 R09: 0000000000001000 [ 31.077061] R10: 0000000000000812 R11: 0000000000000206 R12: 0000556e44dacf70 [ 31.077524] R13: 00007fff7f0ffc20 R14: 00007fff7f0ffc50 R15: 00007fff7f0fffb0 [ 31.077995] [ 31.078156] [ 31.078275] Allocated by task 213: [ 31.078513] kasan_save_stack+0x22/0x50 [ 31.078795] kasan_set_track+0x25/0x30 [ 31.079065] __kasan_slab_alloc+0x59/0x70 [ 31.079357] kmem_cache_alloc+0x16b/0x370 [ 31.079639] vm_area_dup+0x20/0x160 [ 31.079906] __split_vma+0x170/0x950 [ 31.080311] split_vma+0xc6/0x110 [ 31.080599] mprotect_fixup+0x8d2/0xb30 [ 31.080922] do_mprotect_pkey+0x87e/0xd40 [ 31.081271] __x64_sys_mprotect+0x78/0xc0 [ 31.081601] do_syscall_64+0x3f/0x90 [ 31.081930] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 31.082355] [ 31.082493] Freed by task 202: [ 31.082758] kasan_save_stack+0x22/0x50 [ 31.083099] kasan_set_track+0x25/0x30 [ 31.083430] kasan_save_free_info+0x2b/0x50 [ 31.083770] __kasan_slab_free+0x10a/0x190 [ 31.084164] kmem_cache_free+0x10d/0x4d0 [ 31.084508] rcu_core+0x8c8/0x2860 [ 31.084794] __do_softirq+0x1b7/0x7d4 [ 31.085098] [ 31.085229] Last potentially related work creation: [ 31.085609] kasan_save_stack+0x22/0x50 [ 31.085935] __kasan_record_aux_stack+0x8e/0xa0 [ 31.086313] __call_rcu_common.constprop.0+0x6a/0xb90 [ 31.086771] remove_vma+0x139/0x170 [ 31.087089] do_vmi_align_munmap+0xd4a/0x11f0 [ 31.087477] do_vmi_munmap+0x1f1/0x2b0 [ 31.087808] __vm_munmap+0x138/0x3a0 [ 31.088156] __x64_sys_munmap+0x59/0x80 [ 31.088496] do_syscall_64+0x3f/0x90 [ 31.088819] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 31.089229] [ 31.089364] The buggy address belongs to the object at ffff88800c630740 [ 31.089364] which belongs to the cache vm_area_struct of size 168 [ 31.090301] The buggy address is located 88 bytes inside of [ 31.090301] freed 168-byte region [ffff88800c630740, ffff88800c6307e8) [ 31.091255] [ 31.091404] The buggy address belongs to the physical page: [ 31.091844] page:00000000b05883ff refcount:1 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0xc630 [ 31.092646] memcg:ffff88800ca9b101 [ 31.092930] flags: 0x100000000000200(slab|node=0|zone=1) [ 31.093367] page_type: 0xffffffff() [ 31.093675] raw: 0100000000000200 ffff8880087a0c80 dead000000000122 0000000000000000 [ 31.094303] raw: 0000000000000000 0000000000110011 00000001ffffffff ffff88800ca9b101 [ 31.094912] page dumped because: kasan: bad access detected [ 31.095356] [ 31.095503] Memory state around the buggy address: [ 31.095920] ffff88800c630680: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 [ 31.096485] ffff88800c630700: fc fc fc fc fc fc fc fc fa fb fb fb fb fb fb fb [ 31.097082] >ffff88800c630780: fb fb fb fb fb fb fb fb fb fb fb fb fb fc fc fc [ 31.097672] ^ [ 31.098008] ffff88800c630800: fc fc fc fc fc fa fb fb fb fb fb fb fb fb fb fb [ 31.098605] ffff88800c630880: fb fb fb fb fb fb fb fb fb fb fc fc fc fc fc fc [ 31.099187] ================================================================== [ 31.099890] Disabling lock debugging due to kernel taint [ 32.616016] BUG: Bad rss-counter state mm:00000000ef7efd91 type:MM_FILEPAGES val:33 [ 32.616754] BUG: Bad rss-counter state mm:00000000ef7efd91 type:MM_ANONPAGES val:22 [ 32.938429] BUG: Bad rss-counter state mm:000000003fbe1d06 type:MM_FILEPAGES val:33 [ 32.939141] BUG: Bad rss-counter state mm:000000003fbe1d06 type:MM_ANONPAGES val:22 Warning: Permanently added '[localhost]:14830' (ECDSA) to the list of known hosts. 2023/06/21 09:17:29 fuzzer started 2023/06/21 09:17:29 dialing manager at localhost:36067 2023/06/21 09:17:29 checking machine... 2023/06/21 09:17:29 checking revisions... [ 33.512666] kmemleak: Automatic memory scanning thread ended 2023/06/21 09:17:29 testing simple program... [ 33.548168] cgroup: Unknown subsys name 'net' [ 33.600489] cgroup: Unknown subsys name 'rlimit' executing program executing program executing program VM DIAGNOSIS: 09:17:29 Registers: info registers vcpu 0 RAX=ffffffff8180f5bb RBX=ffffffff813ad470 RCX=ffffffff86138e01 RDX=1ffff110011b3f36 RSI=ffffffff8180f5bb RDI=ffff888008d9fa20 RBP=ffff888008d9f9f0 RSP=ffff888008d9f950 R8 =ffffffff86138eb4 R9 =ffff888008d9f998 R10=0000000000038001 R11=0000000000020d9c R12=ffff888008d9fa20 R13=0000000000000000 R14=ffff888008d90000 R15=ffff88801595a100 RIP=ffffffff813ad474 RFL=00000286 [--S--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=00007ffdb14235e8 CR3=000000001820a000 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=2038323a37313a3930203132206e754a XMM01=657463656e6e6f63736944203a5d3932 XMM02=302e303120746f6f722072657375206d XMM03=203a5d3932325b646873732072656c6c XMM04=69662068637573206f4e203a656c6163 XMM05=3a656c696620766e65206e65706f206f XMM06=65733a6468737328766e655f6d617020 XMM07=6b7a79732038323a37313a3930203132 XMM08=3d656e696c646d632022656369767265 XMM09=00000000000000000000000000000000 XMM10=00000000000000000000000000000000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000 info registers vcpu 1 RAX=0000000000000000 RBX=ffffed1002c99f4a RCX=0000000000000000 RDX=0000000000000001 RSI=0000000000000040 RDI=ffffffff813ad470 RBP=ffff888008fae500 RSP=ffff8880164cfa50 R8 =ffff8880199f78c0 R9 =0000000000000000 R10=ffffed100333ef18 R11=0000000000000001 R12=0000000000000cc0 R13=0000000000000cc0 R14=0000000000000cc0 R15=0000000000000cc0 RIP=ffffffff813ad6fc 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 00007f1d4c8c6900 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=00007f1d4ce7e0b0 CR3=0000000016ee0000 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=25252525252525252525252525252525 XMM01=000000000000000000000000000000ff XMM02=000000000000000000000000000000ff XMM03=5320444f4854454d5f54505952434e45 XMM04=40404040404040404040404040404040 XMM05=5a5a5a5a5a5a5a5a5a5a5a5a5a5a5a5a XMM06=20202020202020202020202020202020 XMM07=00000000000000000000000000000000 XMM08=662079726f6d656d20666f2074756f00 XMM09=00000000000000000000000000000000 XMM10=00000000000000000000000000000000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000