syzkaller login: [ 31.603731] BUG: Bad rss-counter state mm:000000005161aa8d type:MM_FILEPAGES val:33 [ 31.604952] BUG: Bad rss-counter state mm:000000005161aa8d type:MM_ANONPAGES val:22 [ 31.762388] ================================================================== [ 31.763301] BUG: KASAN: slab-use-after-free in vma_interval_tree_remove+0xc75/0xec0 [ 31.764232] Read of size 8 at addr ffff88801a32f4e0 by task sshd/220 [ 31.764997] [ 31.765216] CPU: 1 PID: 220 Comm: sshd Not tainted 6.4.0-rc7-next-20230619 #1 [ 31.766200] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS 1.12.0-1 04/01/2014 [ 31.767184] Call Trace: [ 31.767499] [ 31.767797] dump_stack_lvl+0x91/0xf0 [ 31.768281] print_report+0xcc/0x620 [ 31.768758] ? __virt_addr_valid+0x102/0x340 [ 31.769300] ? vma_interval_tree_remove+0xc75/0xec0 [ 31.769906] ? vma_interval_tree_remove+0xc75/0xec0 [ 31.770517] kasan_report+0xbe/0xf0 [ 31.771003] ? vma_interval_tree_remove+0xc75/0xec0 [ 31.771640] vma_interval_tree_remove+0xc75/0xec0 [ 31.772257] vma_prepare+0xc54/0x11a0 [ 31.772753] __split_vma+0x5af/0x950 [ 31.773235] ? __pfx___split_vma+0x10/0x10 [ 31.773774] ? find_held_lock+0x2c/0x110 [ 31.774299] do_vmi_align_munmap+0x2ba/0x11f0 [ 31.774889] ? lock_is_held_type+0x9f/0x120 [ 31.775437] ? __pfx_do_vmi_align_munmap+0x10/0x10 [ 31.776071] ? mtree_range_walk+0x632/0x900 [ 31.776632] ? mas_walk+0x5c7/0x7c0 [ 31.777118] do_vmi_munmap+0x1f1/0x2b0 [ 31.777636] mmap_region+0x1f9/0x2660 [ 31.778131] ? vm_mmap_pgoff+0x15c/0x3a0 [ 31.778653] ? __pfx_arch_get_unmapped_area_topdown+0x10/0x10 [ 31.779413] ? __pfx_lock_acquire+0x10/0x10 [ 31.779959] ? __pfx_mmap_region+0x10/0x10 [ 31.780516] ? security_mmap_addr+0x7d/0xa0 [ 31.781067] ? get_unmapped_area+0x1f5/0x3f0 [ 31.781629] do_mmap+0x854/0xf00 [ 31.782077] vm_mmap_pgoff+0x1a6/0x3a0 [ 31.782588] ? __pfx_vm_mmap_pgoff+0x10/0x10 [ 31.783176] ksys_mmap_pgoff+0x3af/0x500 [ 31.783703] do_syscall_64+0x3f/0x90 [ 31.784202] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 31.784860] RIP: 0033:0x7f7277e68d82 [ 31.785323] 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 [ 31.787529] RSP: 002b:00007ffc348f3d28 EFLAGS: 00000206 ORIG_RAX: 0000000000000009 [ 31.788454] RAX: ffffffffffffffda RBX: 0000000000000812 RCX: 00007f7277e68d82 [ 31.789321] RDX: 0000000000000005 RSI: 0000000000001000 RDI: 00007f72772a2000 [ 31.790191] RBP: 00007f72772a2000 R08: 0000000000000009 R09: 0000000000001000 [ 31.791056] R10: 0000000000000812 R11: 0000000000000206 R12: 0000558ddd849ec0 [ 31.791920] R13: 00007ffc348f3d40 R14: 00007ffc348f3d70 R15: 00007ffc348f40d0 [ 31.792808] [ 31.793112] [ 31.793336] Allocated by task 213: [ 31.793782] kasan_save_stack+0x22/0x50 [ 31.794303] kasan_set_track+0x25/0x30 [ 31.794818] __kasan_slab_alloc+0x59/0x70 [ 31.795351] kmem_cache_alloc+0x16b/0x370 [ 31.795895] vm_area_dup+0x20/0x160 [ 31.796356] __split_vma+0x170/0x950 [ 31.796827] split_vma+0xc6/0x110 [ 31.797263] mprotect_fixup+0x8d2/0xb30 [ 31.797775] do_mprotect_pkey+0x87e/0xd40 [ 31.798292] __x64_sys_mprotect+0x78/0xc0 [ 31.798826] do_syscall_64+0x3f/0x90 [ 31.799304] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 31.799961] [ 31.800173] Freed by task 19: [ 31.800560] kasan_save_stack+0x22/0x50 [ 31.801069] kasan_set_track+0x25/0x30 [ 31.801567] kasan_save_free_info+0x2b/0x50 [ 31.802107] __kasan_slab_free+0x10a/0x190 [ 31.802640] kmem_cache_free+0x10d/0x4d0 [ 31.803158] rcu_core+0x8c8/0x2860 [ 31.803602] __do_softirq+0x1b7/0x7d4 [ 31.804078] [ 31.804293] Last potentially related work creation: [ 31.804878] kasan_save_stack+0x22/0x50 [ 31.805379] __kasan_record_aux_stack+0x8e/0xa0 [ 31.805958] __call_rcu_common.constprop.0+0x6a/0xb90 [ 31.806679] remove_vma+0x139/0x170 [ 31.807137] do_vmi_align_munmap+0xd4a/0x11f0 [ 31.807694] do_vmi_munmap+0x1f1/0x2b0 [ 31.808180] __vm_munmap+0x138/0x3a0 [ 31.808650] __x64_sys_munmap+0x59/0x80 [ 31.809148] do_syscall_64+0x3f/0x90 [ 31.809620] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 31.810264] [ 31.810478] The buggy address belongs to the object at ffff88801a32f488 [ 31.810478] which belongs to the cache vm_area_struct of size 168 [ 31.811953] The buggy address is located 88 bytes inside of [ 31.811953] freed 168-byte region [ffff88801a32f488, ffff88801a32f530) [ 31.813343] [ 31.813555] The buggy address belongs to the physical page: [ 31.814213] page:00000000e26156ff refcount:1 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0x1a32f [ 31.815306] memcg:ffff88801a330001 [ 31.815737] flags: 0x100000000000200(slab|node=0|zone=1) [ 31.816390] page_type: 0xffffffff() [ 31.816852] raw: 0100000000000200 ffff88800879fc80 dead000000000122 0000000000000000 [ 31.817806] raw: 0000000000000000 0000000000110011 00000001ffffffff ffff88801a330001 [ 31.818769] page dumped because: kasan: bad access detected [ 31.819454] [ 31.819672] Memory state around the buggy address: [ 31.820267] ffff88801a32f380: fc fc fc fc 00 00 00 00 00 00 00 00 00 00 00 00 [ 31.821160] ffff88801a32f400: 00 00 00 00 00 00 00 00 00 fc fc fc fc fc fc fc [ 31.822055] >ffff88801a32f480: fc fa fb fb fb fb fb fb fb fb fb fb fb fb fb fb [ 31.822932] ^ [ 31.823713] ffff88801a32f500: fb fb fb fb fb fb fc fc fc fc fc fc fc fc fa fb [ 31.824597] ffff88801a32f580: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb [ 31.825467] ================================================================== [ 31.826541] Disabling lock debugging due to kernel taint [ 33.869510] BUG: Bad rss-counter state mm:00000000c47c09bd type:MM_FILEPAGES val:33 [ 33.870687] BUG: Bad rss-counter state mm:00000000c47c09bd type:MM_ANONPAGES val:22 [ 34.261948] BUG: Bad rss-counter state mm:00000000524d6b28 type:MM_FILEPAGES val:33 [ 34.263142] BUG: Bad rss-counter state mm:00000000524d6b28 type:MM_ANONPAGES val:22 Warning: Permanently added '[localhost]:22674' (ECDSA) to the list of known hosts. 2023/06/20 03:27:59 fuzzer started 2023/06/20 03:27:59 dialing manager at localhost:44161 2023/06/20 03:27:59 checking machine... 2023/06/20 03:27:59 checking revisions... [ 34.969405] kmemleak: Automatic memory scanning thread ended 2023/06/20 03:27:59 testing simple program... [ 35.020699] cgroup: Unknown subsys name 'net' [ 35.070580] cgroup: Unknown subsys name 'rlimit' executing program executing program executing program VM DIAGNOSIS: 03:27:58 Registers: info registers vcpu 0 RAX=0000000000000000 RBX=0000000000000024 RCX=0000000000000000 RDX=0000000000000024 RSI=ffff888016adaa50 RDI=ffffffff856f0b20 RBP=ffff888016adaa50 RSP=ffff88800d897ac8 R8 =0000000000000005 R9 =0000000000000000 R10=0000000000000000 R11=0000000000000001 R12=0000000000000000 R13=0000000000008000 R14=ffffffff856f0b20 R15=ffff88800d897c48 RIP=ffffffff81895024 RFL=00000206 [-----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 00007fb47a184900 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=00007fb47a73c0b0 CR3=00000000094ba000 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=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 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=00007ffffdce5448 CR3=0000000016504000 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=2039353a37323a3330203032206e754a XMM01=73732878696e755f6d6170203a5d3932 XMM02=65736f6c63206e6f6973736573203a29 XMM03=755f6d6170203a5d3932325b64687373 XMM04=69662068637573206f4e203a656c6163 XMM05=3a656c696620766e65206e65706f206f XMM06=65733a6468737328766e655f6d617020 XMM07=6b7a79732038353a37323a3330203032 XMM08=3d656e696c646d632022656369767265 XMM09=00000000000000000000000000000000 XMM10=00000000000000000000000000000000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000