syzkaller login: [ 31.770456] BUG: Bad rss-counter state mm:00000000178a68af type:MM_FILEPAGES val:33 [ 31.771633] BUG: Bad rss-counter state mm:00000000178a68af type:MM_ANONPAGES val:22 [ 31.911344] ================================================================== [ 31.912468] BUG: KASAN: slab-use-after-free in vma_interval_tree_remove+0xc75/0xec0 [ 31.913467] Read of size 8 at addr ffff88800de4adf0 by task sshd/218 [ 31.914406] [ 31.914628] CPU: 1 PID: 218 Comm: sshd Not tainted 6.4.0-rc7-next-20230619 #1 [ 31.915492] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS 1.12.0-1 04/01/2014 [ 31.916494] Call Trace: [ 31.916816] [ 31.917097] dump_stack_lvl+0x91/0xf0 [ 31.917597] print_report+0xcc/0x620 [ 31.918081] ? __virt_addr_valid+0x102/0x340 [ 31.918635] ? vma_interval_tree_remove+0xc75/0xec0 [ 31.919256] ? vma_interval_tree_remove+0xc75/0xec0 [ 31.919889] kasan_report+0xbe/0xf0 [ 31.920365] ? vma_interval_tree_remove+0xc75/0xec0 [ 31.920995] vma_interval_tree_remove+0xc75/0xec0 [ 31.921598] vma_prepare+0xc54/0x11a0 [ 31.922083] __split_vma+0x5af/0x950 [ 31.922549] ? __pfx___split_vma+0x10/0x10 [ 31.923072] ? find_held_lock+0x2c/0x110 [ 31.923597] do_vmi_align_munmap+0x2ba/0x11f0 [ 31.924168] ? lock_is_held_type+0x9f/0x120 [ 31.924725] ? __pfx_do_vmi_align_munmap+0x10/0x10 [ 31.925338] ? mtree_range_walk+0x632/0x900 [ 31.925888] ? mas_walk+0x5c7/0x7c0 [ 31.926361] do_vmi_munmap+0x1f1/0x2b0 [ 31.926852] mmap_region+0x1f9/0x2660 [ 31.927330] ? vm_mmap_pgoff+0x15c/0x3a0 [ 31.927837] ? __pfx_arch_get_unmapped_area_topdown+0x10/0x10 [ 31.928557] ? __pfx_lock_acquire+0x10/0x10 [ 31.929089] ? __pfx_mmap_region+0x10/0x10 [ 31.929620] ? security_mmap_addr+0x7d/0xa0 [ 31.930150] ? get_unmapped_area+0x1f5/0x3f0 [ 31.930705] do_mmap+0x854/0xf00 [ 31.931144] vm_mmap_pgoff+0x1a6/0x3a0 [ 31.931637] ? __pfx_vm_mmap_pgoff+0x10/0x10 [ 31.932197] ksys_mmap_pgoff+0x3af/0x500 [ 31.932707] do_syscall_64+0x3f/0x90 [ 31.933184] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 31.933829] RIP: 0033:0x7fe90d560d82 [ 31.934283] 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 [ 31.936419] RSP: 002b:00007ffef81d1b38 EFLAGS: 00000206 ORIG_RAX: 0000000000000009 [ 31.937324] RAX: ffffffffffffffda RBX: 0000000000000812 RCX: 00007fe90d560d82 [ 31.938168] RDX: 0000000000000005 RSI: 0000000000001000 RDI: 00007fe90c99a000 [ 31.939012] RBP: 00007fe90c99a000 R08: 0000000000000009 R09: 0000000000001000 [ 31.939856] R10: 0000000000000812 R11: 0000000000000206 R12: 0000565517c3ad90 [ 31.940716] R13: 00007ffef81d1b50 R14: 00007ffef81d1b80 R15: 00007ffef81d1ee0 [ 31.941573] [ 31.941870] [ 31.942088] Allocated by task 211: [ 31.942512] kasan_save_stack+0x22/0x50 [ 31.943025] kasan_set_track+0x25/0x30 [ 31.943520] __kasan_slab_alloc+0x59/0x70 [ 31.944048] kmem_cache_alloc+0x16b/0x370 [ 31.944576] vm_area_dup+0x20/0x160 [ 31.945036] __split_vma+0x170/0x950 [ 31.945499] split_vma+0xc6/0x110 [ 31.945940] mprotect_fixup+0x8d2/0xb30 [ 31.946440] do_mprotect_pkey+0x87e/0xd40 [ 31.946969] __x64_sys_mprotect+0x78/0xc0 [ 31.947487] do_syscall_64+0x3f/0x90 [ 31.947956] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 31.948621] [ 31.948836] Freed by task 211: [ 31.949235] kasan_save_stack+0x22/0x50 [ 31.949741] kasan_set_track+0x25/0x30 [ 31.950230] kasan_save_free_info+0x2b/0x50 [ 31.950777] __kasan_slab_free+0x10a/0x190 [ 31.951308] kmem_cache_free+0x10d/0x4d0 [ 31.951820] rcu_core+0x8c8/0x2860 [ 31.952269] __do_softirq+0x1b7/0x7d4 [ 31.952747] [ 31.952961] Last potentially related work creation: [ 31.953548] kasan_save_stack+0x22/0x50 [ 31.954048] __kasan_record_aux_stack+0x8e/0xa0 [ 31.954618] __call_rcu_common.constprop.0+0x6a/0xb90 [ 31.955329] remove_vma+0x139/0x170 [ 31.955780] do_vmi_align_munmap+0xd4a/0x11f0 [ 31.956333] do_vmi_munmap+0x1f1/0x2b0 [ 31.956835] __vm_munmap+0x138/0x3a0 [ 31.957298] __x64_sys_munmap+0x59/0x80 [ 31.957801] do_syscall_64+0x3f/0x90 [ 31.958273] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 31.958907] [ 31.959125] The buggy address belongs to the object at ffff88800de4ad98 [ 31.959125] which belongs to the cache vm_area_struct of size 168 [ 31.960593] The buggy address is located 88 bytes inside of [ 31.960593] freed 168-byte region [ffff88800de4ad98, ffff88800de4ae40) [ 31.961998] [ 31.962213] The buggy address belongs to the physical page: [ 31.962876] page:000000007d6be22a refcount:1 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0xde4a [ 31.963953] memcg:ffff88800e70b601 [ 31.964379] flags: 0x100000000000200(slab|node=0|zone=1) [ 31.965037] page_type: 0xffffffff() [ 31.965486] raw: 0100000000000200 ffff88800879fc80 ffffea0000325700 dead000000000004 [ 31.966418] raw: 0000000000000000 0000000000110011 00000001ffffffff ffff88800e70b601 [ 31.967320] page dumped because: kasan: bad access detected [ 31.967975] [ 31.968197] Memory state around the buggy address: [ 31.968800] ffff88800de4ac80: fc fc fc fc fc fc 00 00 00 00 00 00 00 00 00 00 [ 31.969664] ffff88800de4ad00: 00 00 00 00 00 00 00 00 00 00 00 fc fc fc fc fc [ 31.970530] >ffff88800de4ad80: fc fc fc fa fb fb fb fb fb fb fb fb fb fb fb fb [ 31.971393] ^ [ 31.972205] ffff88800de4ae00: fb fb fb fb fb fb fb fb fc fc fc fc fc fc fc fc [ 31.973084] ffff88800de4ae80: fa fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb [ 31.973938] ================================================================== [ 31.975039] Disabling lock debugging due to kernel taint [ 34.342439] BUG: Bad rss-counter state mm:00000000f6284e8d type:MM_FILEPAGES val:33 [ 34.343613] BUG: Bad rss-counter state mm:00000000f6284e8d type:MM_ANONPAGES val:22 [ 34.691733] BUG: Bad rss-counter state mm:00000000d54e7dac type:MM_FILEPAGES val:33 [ 34.692826] BUG: Bad rss-counter state mm:00000000d54e7dac type:MM_ANONPAGES val:22 Warning: Permanently added '[localhost]:9210' (ECDSA) to the list of known hosts. 2023/06/20 05:11:05 fuzzer started 2023/06/20 05:11:05 dialing manager at localhost:44161 2023/06/20 05:11:05 checking machine... 2023/06/20 05:11:05 checking revisions... [ 35.408018] kmemleak: Automatic memory scanning thread ended 2023/06/20 05:11:05 testing simple program... [ 35.464823] cgroup: Unknown subsys name 'net' [ 35.503964] cgroup: Unknown subsys name 'rlimit' executing program executing program executing program VM DIAGNOSIS: 05:11:04 Registers: info registers vcpu 0 RAX=ffffffff861d00d5 RBX=0000000000000001 RCX=ffffffff861d00d0 RDX=0000000000000000 RSI=0000000000000000 RDI=0000000000000001 RBP=ffff8880158df460 RSP=ffff8880158df398 R8 =ffffffff861d00d4 R9 =ffff8880158df448 R10=0000000000038001 R11=000000000003a4d6 R12=ffff8880158df468 R13=ffff8880158df450 R14=ffff8880158df449 R15=ffff8880158df408 RIP=ffffffff81130abf 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 00007f0b6b8a0700 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=00007f533f5170b0 CR3=000000001658e000 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=00000000000000000000000000000000 XMM01=6d6f72662064657463656e6e6f637369 XMM02=2e303120746f6f722072657375206d6f XMM03=3a5d3732325b646873732035303a3131 XMM04=6456774875434142334f726f59427469 XMM05=485320415352203a3268737320303436 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=ffffffff8450c50e RDX=ffffed100d9e6a01 RSI=0000000000000004 RDI=ffffffff812889a5 RBP=dffffc0000000000 RSP=ffff888008e27e70 R8 =0000000000000000 R9 =ffffed100d9e6a00 R10=ffff88806cf35003 R11=ffff888008c58400 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=00007f317a2bc9f0 CR3=000000000da44000 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=a58c68736c77ceae4740862aaee433ab XMM02=000000000011ff88eff9b2d0a8fce9cb XMM03=00000000001200582c67c8bc2e329bc3 XMM04=372b174e6996c6c200000000000ae988 XMM05=a503df32f9be67270000000000134a10 XMM06=bdf2e299e47b49d50000000000133740 XMM07=e042d86d42eb936e0000000000123f78 XMM08=4535a8ad2cee58260000000000120058 XMM09=00000000000000000000000000000000 XMM10=00000000000000000000000000000000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000