syzkaller login: [ 33.140947] BUG: Bad rss-counter state mm:00000000b66baa09 type:MM_FILEPAGES val:33 [ 33.142434] BUG: Bad rss-counter state mm:00000000b66baa09 type:MM_ANONPAGES val:22 [ 33.266302] ================================================================== [ 33.267267] BUG: KASAN: slab-use-after-free in vma_interval_tree_remove+0xc75/0xec0 [ 33.268258] Read of size 8 at addr ffff88801979edf0 by task sshd/220 [ 33.269068] [ 33.269291] CPU: 0 PID: 220 Comm: sshd Not tainted 6.4.0-rc7-next-20230619 #1 [ 33.270303] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS 1.12.0-1 04/01/2014 [ 33.271337] Call Trace: [ 33.271678] [ 33.271969] dump_stack_lvl+0x91/0xf0 [ 33.272476] print_report+0xcc/0x620 [ 33.272987] ? __virt_addr_valid+0x102/0x340 [ 33.273563] ? vma_interval_tree_remove+0xc75/0xec0 [ 33.274194] ? vma_interval_tree_remove+0xc75/0xec0 [ 33.274871] kasan_report+0xbe/0xf0 [ 33.275369] ? vma_interval_tree_remove+0xc75/0xec0 [ 33.276008] vma_interval_tree_remove+0xc75/0xec0 [ 33.276630] vma_prepare+0xc54/0x11a0 [ 33.277128] __split_vma+0x5af/0x950 [ 33.277611] ? __pfx___split_vma+0x10/0x10 [ 33.278154] ? find_held_lock+0x2c/0x110 [ 33.278703] do_vmi_align_munmap+0x2ba/0x11f0 [ 33.279296] ? lock_is_held_type+0x9f/0x120 [ 33.279847] ? __pfx_do_vmi_align_munmap+0x10/0x10 [ 33.280469] ? mtree_range_walk+0x632/0x900 [ 33.281046] ? mas_walk+0x5c7/0x7c0 [ 33.281551] do_vmi_munmap+0x1f1/0x2b0 [ 33.282040] mmap_region+0x1f9/0x2660 [ 33.282519] ? vm_mmap_pgoff+0x15c/0x3a0 [ 33.283038] ? __pfx_arch_get_unmapped_area_topdown+0x10/0x10 [ 33.283752] ? __pfx_lock_acquire+0x10/0x10 [ 33.284282] ? __pfx_mmap_region+0x10/0x10 [ 33.284809] ? security_mmap_addr+0x7d/0xa0 [ 33.285336] ? get_unmapped_area+0x1f5/0x3f0 [ 33.285900] do_mmap+0x854/0xf00 [ 33.286336] vm_mmap_pgoff+0x1a6/0x3a0 [ 33.286835] ? __pfx_vm_mmap_pgoff+0x10/0x10 [ 33.287415] ksys_mmap_pgoff+0x3af/0x500 [ 33.287918] do_syscall_64+0x3f/0x90 [ 33.288395] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 33.289048] RIP: 0033:0x7fcc3e9ecd82 [ 33.289512] 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 [ 33.291660] RSP: 002b:00007ffebdfe0598 EFLAGS: 00000206 ORIG_RAX: 0000000000000009 [ 33.292563] RAX: ffffffffffffffda RBX: 0000000000000812 RCX: 00007fcc3e9ecd82 [ 33.293430] RDX: 0000000000000005 RSI: 0000000000001000 RDI: 00007fcc3de26000 [ 33.294283] RBP: 00007fcc3de26000 R08: 0000000000000009 R09: 0000000000001000 [ 33.295157] R10: 0000000000000812 R11: 0000000000000206 R12: 00005576050a7ec0 [ 33.295994] R13: 00007ffebdfe05b0 R14: 00007ffebdfe05e0 R15: 00007ffebdfe0940 [ 33.296845] [ 33.297139] [ 33.297354] Allocated by task 213: [ 33.297779] kasan_save_stack+0x22/0x50 [ 33.298282] kasan_set_track+0x25/0x30 [ 33.298773] __kasan_slab_alloc+0x59/0x70 [ 33.299304] kmem_cache_alloc+0x16b/0x370 [ 33.299820] vm_area_dup+0x20/0x160 [ 33.300277] __split_vma+0x170/0x950 [ 33.300740] split_vma+0xc6/0x110 [ 33.301175] mprotect_fixup+0x8d2/0xb30 [ 33.301694] do_mprotect_pkey+0x87e/0xd40 [ 33.302211] __x64_sys_mprotect+0x78/0xc0 [ 33.302728] do_syscall_64+0x3f/0x90 [ 33.303225] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 33.303869] [ 33.304084] Freed by task 13: [ 33.304484] kasan_save_stack+0x22/0x50 [ 33.305032] kasan_set_track+0x25/0x30 [ 33.305568] kasan_save_free_info+0x2b/0x50 [ 33.306149] __kasan_slab_free+0x10a/0x190 [ 33.306730] kmem_cache_free+0x10d/0x4d0 [ 33.307287] rcu_core+0x8c8/0x2860 [ 33.307768] __do_softirq+0x1b7/0x7d4 [ 33.308287] [ 33.308518] Last potentially related work creation: [ 33.309157] kasan_save_stack+0x22/0x50 [ 33.309711] __kasan_record_aux_stack+0x8e/0xa0 [ 33.310334] __call_rcu_common.constprop.0+0x6a/0xb90 [ 33.311049] remove_vma+0x139/0x170 [ 33.311537] do_vmi_align_munmap+0xd4a/0x11f0 [ 33.312137] do_vmi_munmap+0x1f1/0x2b0 [ 33.312659] __vm_munmap+0x138/0x3a0 [ 33.313150] __x64_sys_munmap+0x59/0x80 [ 33.313679] do_syscall_64+0x3f/0x90 [ 33.314188] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 33.314879] [ 33.315104] The buggy address belongs to the object at ffff88801979ed98 [ 33.315104] which belongs to the cache vm_area_struct of size 168 [ 33.316669] The buggy address is located 88 bytes inside of [ 33.316669] freed 168-byte region [ffff88801979ed98, ffff88801979ee40) [ 33.318166] [ 33.318396] The buggy address belongs to the physical page: [ 33.319101] page:000000004bfc813d refcount:1 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0x1979e [ 33.320266] memcg:ffff8880182e4c01 [ 33.320716] flags: 0x100000000000200(slab|node=0|zone=1) [ 33.321403] page_type: 0xffffffff() [ 33.321880] raw: 0100000000000200 ffff88800879fc80 dead000000000122 0000000000000000 [ 33.322854] raw: 0000000000000000 0000000000110011 00000001ffffffff ffff8880182e4c01 [ 33.323818] page dumped because: kasan: bad access detected [ 33.324519] [ 33.324748] Memory state around the buggy address: [ 33.325370] ffff88801979ec80: fc fc fc fc fc fc 00 00 00 00 00 00 00 00 00 00 [ 33.326282] ffff88801979ed00: 00 00 00 00 00 00 00 00 00 00 00 fc fc fc fc fc [ 33.327215] >ffff88801979ed80: fc fc fc fa fb fb fb fb fb fb fb fb fb fb fb fb [ 33.328123] ^ [ 33.328981] ffff88801979ee00: fb fb fb fb fb fb fb fb fc fc fc fc fc fc fc fc [ 33.329892] ffff88801979ee80: fa fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb [ 33.330792] ================================================================== [ 33.331818] Disabling lock debugging due to kernel taint [ 35.173024] BUG: Bad rss-counter state mm:000000003dc7db9a type:MM_FILEPAGES val:33 [ 35.174029] BUG: Bad rss-counter state mm:000000003dc7db9a type:MM_ANONPAGES val:22 [ 35.612834] BUG: Bad rss-counter state mm:0000000057369f3d type:MM_FILEPAGES val:33 [ 35.613718] BUG: Bad rss-counter state mm:0000000057369f3d type:MM_ANONPAGES val:22 Warning: Permanently added '[localhost]:5264' (ECDSA) to the list of known hosts. 2023/06/19 21:49:04 fuzzer started 2023/06/19 21:49:04 dialing manager at localhost:44161 2023/06/19 21:49:04 checking machine... 2023/06/19 21:49:04 checking revisions... [ 36.357753] kmemleak: Automatic memory scanning thread ended 2023/06/19 21:49:04 testing simple program... [ 36.405196] cgroup: Unknown subsys name 'net' [ 36.452440] cgroup: Unknown subsys name 'rlimit' executing program executing program executing program VM DIAGNOSIS: 21:49:02 Registers: info registers vcpu 0 RAX=0000000000000000 RBX=0000000000000000 RCX=ffffffff844f259e RDX=0000000000000002 RSI=0000000000000000 RDI=0000000000000000 RBP=ffff888016967938 RSP=ffff8880169678a8 R8 =0000000000000007 R9 =0000000000000002 R10=0000000000000000 R11=0000000000000000 R12=ffffea00006d9cc0 R13=dffffc0000000000 R14=0000000000000000 R15=0000000000000000 RIP=ffffffff814c0328 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 00007fb3838c6900 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=00007fff0b375000 CR3=0000000015e42000 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=2c2c2c2c2c2c2c2c2c2c2c2c2c2c2c2c XMM01=00ff00000000000000000000000000ff XMM02=00ff00000000000000000000000000ff XMM03=655f6d61702c7374696d696c5f6d6170 XMM04=3d6c616e696d72657420322e322e302e XMM05=3d656d616e74736f682022646873732f XMM06=746f6f72223d746363612078756e696c XMM07=6e655f6d61702c7374696d696c5f6d61 XMM08=6500273d2720676e6974636570786500 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=00007fd9de384540 CR3=000000000dd64000 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=2034303a39343a3132203931206e754a XMM01=73732878696e755f6d6170203a5d3932 XMM02=65736f6c63206e6f6973736573203a29 XMM03=755f6d6170203a5d3932325b64687373 XMM04=69662068637573206f4e203a656c6163 XMM05=3a656c696620766e65206e65706f206f XMM06=65733a6468737328766e655f6d617020 XMM07=6b7a79732033303a39343a3132203931 XMM08=3d656e696c646d632022656369767265 XMM09=00000000000000000000000000000000 XMM10=00000000000000000000000000000000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000