syzkaller login: [ 30.182413] BUG: Bad rss-counter state mm:0000000079ccc8ba type:MM_FILEPAGES val:33 [ 30.183653] BUG: Bad rss-counter state mm:0000000079ccc8ba type:MM_ANONPAGES val:22 [ 30.236766] ================================================================== [ 30.238001] BUG: KASAN: slab-use-after-free in vma_interval_tree_remove+0xc75/0xec0 [ 30.239066] Read of size 8 at addr ffff88801581e140 by task sshd/220 [ 30.239924] [ 30.240164] CPU: 1 PID: 220 Comm: sshd Not tainted 6.4.0-rc7-next-20230620 #1 [ 30.241132] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS 1.12.0-1 04/01/2014 [ 30.242241] Call Trace: [ 30.242611] [ 30.242923] dump_stack_lvl+0x91/0xf0 [ 30.243499] print_report+0xcc/0x620 [ 30.244036] ? __virt_addr_valid+0x102/0x340 [ 30.244653] ? vma_interval_tree_remove+0xc75/0xec0 [ 30.245345] ? vma_interval_tree_remove+0xc75/0xec0 [ 30.246040] kasan_report+0xbe/0xf0 [ 30.246597] ? vma_interval_tree_remove+0xc75/0xec0 [ 30.247316] vma_interval_tree_remove+0xc75/0xec0 [ 30.247999] vma_prepare+0xc54/0x11a0 [ 30.248541] __split_vma+0x5af/0x950 [ 30.249073] ? __pfx___split_vma+0x10/0x10 [ 30.249673] ? find_held_lock+0x2c/0x110 [ 30.250248] do_vmi_align_munmap+0x2ba/0x11f0 [ 30.250880] ? lock_is_held_type+0x9f/0x120 [ 30.251517] ? __pfx_do_vmi_align_munmap+0x10/0x10 [ 30.252193] ? mtree_range_walk+0x632/0x900 [ 30.252816] ? mas_walk+0x5c7/0x7c0 [ 30.253344] do_vmi_munmap+0x1f1/0x2b0 [ 30.253899] mmap_region+0x1f9/0x2660 [ 30.254436] ? vm_mmap_pgoff+0x15c/0x3a0 [ 30.255011] ? __pfx_arch_get_unmapped_area_topdown+0x10/0x10 [ 30.255836] ? __pfx_lock_acquire+0x10/0x10 [ 30.256437] ? __pfx_mmap_region+0x10/0x10 [ 30.257047] ? security_mmap_addr+0x7d/0xa0 [ 30.257645] ? get_unmapped_area+0x1f5/0x3f0 [ 30.258256] do_mmap+0x854/0xf00 [ 30.258755] vm_mmap_pgoff+0x1a6/0x3a0 [ 30.259318] ? __pfx_vm_mmap_pgoff+0x10/0x10 [ 30.259954] ksys_mmap_pgoff+0x3af/0x500 [ 30.260529] do_syscall_64+0x3f/0x90 [ 30.261068] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 30.261818] RIP: 0033:0x7f449bc37d82 [ 30.262326] 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 [ 30.264738] RSP: 002b:00007ffe64460438 EFLAGS: 00000206 ORIG_RAX: 0000000000000009 [ 30.265747] RAX: ffffffffffffffda RBX: 0000000000000812 RCX: 00007f449bc37d82 [ 30.266725] RDX: 0000000000000005 RSI: 0000000000001000 RDI: 00007f449b071000 [ 30.267707] RBP: 00007f449b071000 R08: 0000000000000009 R09: 0000000000001000 [ 30.268657] R10: 0000000000000812 R11: 0000000000000206 R12: 000055e86cb57980 [ 30.269612] R13: 00007ffe64460450 R14: 00007ffe64460480 R15: 00007ffe644607e0 [ 30.270589] [ 30.270917] [ 30.271167] Allocated by task 213: [ 30.271668] kasan_save_stack+0x22/0x50 [ 30.272231] kasan_set_track+0x25/0x30 [ 30.272789] __kasan_slab_alloc+0x59/0x70 [ 30.273371] kmem_cache_alloc+0x16b/0x370 [ 30.273952] vm_area_dup+0x20/0x160 [ 30.274469] __split_vma+0x170/0x950 [ 30.274982] split_vma+0xc6/0x110 [ 30.275512] mprotect_fixup+0x8d2/0xb30 [ 30.276070] do_mprotect_pkey+0x87e/0xd40 [ 30.276726] __x64_sys_mprotect+0x78/0xc0 [ 30.277440] do_syscall_64+0x3f/0x90 [ 30.277973] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 30.278712] [ 30.278954] Freed by task 213: [ 30.279397] kasan_save_stack+0x22/0x50 [ 30.279968] kasan_set_track+0x25/0x30 [ 30.280540] kasan_save_free_info+0x2b/0x50 [ 30.281129] __kasan_slab_free+0x10a/0x190 [ 30.281743] kmem_cache_free+0x10d/0x4d0 [ 30.282307] rcu_core+0x8c8/0x2860 [ 30.282815] __do_softirq+0x1b7/0x7d4 [ 30.283361] [ 30.283617] Last potentially related work creation: [ 30.284274] kasan_save_stack+0x22/0x50 [ 30.284847] __kasan_record_aux_stack+0x8e/0xa0 [ 30.285497] __call_rcu_common.constprop.0+0x6a/0xb90 [ 30.286222] remove_vma+0x139/0x170 [ 30.286750] do_vmi_align_munmap+0xd4a/0x11f0 [ 30.287388] do_vmi_munmap+0x1f1/0x2b0 [ 30.287941] __vm_munmap+0x138/0x3a0 [ 30.288461] __x64_sys_munmap+0x59/0x80 [ 30.289022] do_syscall_64+0x3f/0x90 [ 30.289563] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 30.290276] [ 30.290524] The buggy address belongs to the object at ffff88801581e0e8 [ 30.290524] which belongs to the cache vm_area_struct of size 168 [ 30.292200] The buggy address is located 88 bytes inside of [ 30.292200] freed 168-byte region [ffff88801581e0e8, ffff88801581e190) [ 30.293788] [ 30.294028] The buggy address belongs to the physical page: [ 30.294770] page:00000000c9754e01 refcount:1 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0x1581e [ 30.296029] memcg:ffff888015882401 [ 30.296536] flags: 0x100000000000200(slab|node=0|zone=1) [ 30.297254] page_type: 0xffffffff() [ 30.297776] raw: 0100000000000200 ffff8880087a0c80 dead000000000122 0000000000000000 [ 30.298809] raw: 0000000000000000 0000000000110011 00000001ffffffff ffff888015882401 [ 30.299847] page dumped because: kasan: bad access detected [ 30.300595] [ 30.300830] Memory state around the buggy address: [ 30.301494] ffff88801581e000: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 [ 30.302468] ffff88801581e080: 00 00 00 00 00 fc fc fc fc fc fc fc fc fa fb fb [ 30.303455] >ffff88801581e100: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb [ 30.304407] ^ [ 30.305134] ffff88801581e180: fb fb fc fc fc fc fc fc fc fc fa fb fb fb fb fb [ 30.306096] ffff88801581e200: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fc [ 30.307070] ================================================================== [ 30.308125] Disabling lock debugging due to kernel taint [ 32.878684] BUG: Bad rss-counter state mm:000000001abd8c27 type:MM_FILEPAGES val:33 [ 32.879680] BUG: Bad rss-counter state mm:000000001abd8c27 type:MM_ANONPAGES val:22 [ 33.359480] BUG: Bad rss-counter state mm:00000000d5706aa2 type:MM_FILEPAGES val:33 [ 33.360810] BUG: Bad rss-counter state mm:00000000d5706aa2 type:MM_ANONPAGES val:22 Warning: Permanently added '[localhost]:49602' (ECDSA) to the list of known hosts. 2023/06/20 14:29:07 fuzzer started 2023/06/20 14:29:08 dialing manager at localhost:36067 2023/06/20 14:29:08 checking machine... 2023/06/20 14:29:08 checking revisions... [ 34.042552] kmemleak: Automatic memory scanning thread ended 2023/06/20 14:29:08 testing simple program... [ 34.091722] cgroup: Unknown subsys name 'net' [ 34.129353] cgroup: Unknown subsys name 'rlimit' executing program executing program executing program VM DIAGNOSIS: 14:29:07 Registers: info registers vcpu 0 RAX=0000000000000000 RBX=ffffffff856d84a0 RCX=ffffffff812e0135 RDX=0000000000000001 RSI=0000000000000004 RDI=ffff88806ce09d78 RBP=1ffff1100d9c13ab RSP=ffff88806ce09d50 R8 =0000000000000001 R9 =ffffed100d9c13af R10=0000000000000003 R11=00000000000b6a61 R12=ffffffff856d84a8 R13=ffffffff856d84b0 R14=ffffffff813782f8 R15=ffff88800bed0000 RIP=ffffffff812e0146 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 00007f2ebef93900 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=00007fb3a2b37000 CR3=000000000c608000 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=ff0000000000ffff0000000000ff0000 XMM02=ff000000000000ff0000000000ff0000 XMM03=66207463656e6e6f6373696420646576 XMM04=00000000000000000000000000000000 XMM05=00000000000000000000000000000000 XMM06=0d0c0f0e09080b0a0504070601000302 XMM07=00000000000000000000000000000000 XMM08=000a0d732a2e25006c61746166003367 XMM09=00000000000000000000000000000000 XMM10=00000000000000000000000000000000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000 info registers vcpu 1 RAX=ffff88806cf35000 RBX=0000000000000001 RCX=ffffffff8451250e RDX=ffffed100d9e6a01 RSI=0000000000000004 RDI=ffffffff81288ac5 RBP=dffffc0000000000 RSP=ffff888008e07e70 R8 =0000000000000000 R9 =ffffed100d9e6a00 R10=ffff88806cf35003 R11=0000000000000001 R12=ffffffff85d3d350 R13=1ffff110011c0fd3 R14=0000000000000000 R15=0000000000000000 RIP=ffffffff8451349f 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=00007ffe87044388 CR3=000000000f734000 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=2037303a39323a3431203032206e754a XMM01=73732878696e755f6d6170203a5d3932 XMM02=65736f6c63206e6f6973736573203a29 XMM03=755f6d6170203a5d3932325b64687373 XMM04=69662068637573206f4e203a656c6163 XMM05=3a656c696620766e65206e65706f206f XMM06=65733a6468737328766e655f6d617020 XMM07=6b7a79732037303a39323a3431203032 XMM08=3d656e696c646d632022656369767265 XMM09=00000000000000000000000000000000 XMM10=00000000000000000000000000000000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000