syzkaller login: [ 61.138812] BUG: Bad rss-counter state mm:00000000b514dee5 type:MM_FILEPAGES val:33 [ 61.139711] BUG: Bad rss-counter state mm:00000000b514dee5 type:MM_ANONPAGES val:22 [ 61.296725] ================================================================== [ 61.297511] BUG: KASAN: slab-use-after-free in vma_interval_tree_remove+0xc75/0xec0 [ 61.298333] Read of size 8 at addr ffff888009484c20 by task sshd/220 [ 61.298988] [ 61.299171] CPU: 0 PID: 220 Comm: sshd Not tainted 6.4.0-rc7-next-20230620 #1 [ 61.299906] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS 1.12.0-1 04/01/2014 [ 61.301008] Call Trace: [ 61.301289] [ 61.301532] dump_stack_lvl+0x91/0xf0 [ 61.302047] print_report+0xcc/0x620 [ 61.302439] ? __virt_addr_valid+0x102/0x340 [ 61.302833] ? vma_interval_tree_remove+0xc75/0xec0 [ 61.303257] ? vma_interval_tree_remove+0xc75/0xec0 [ 61.303692] kasan_report+0xbe/0xf0 [ 61.304031] ? vma_interval_tree_remove+0xc75/0xec0 [ 61.304469] vma_interval_tree_remove+0xc75/0xec0 [ 61.304898] vma_prepare+0xc54/0x11a0 [ 61.305237] __split_vma+0x5af/0x950 [ 61.305567] ? __pfx___split_vma+0x10/0x10 [ 61.305987] ? find_held_lock+0x2c/0x110 [ 61.306358] do_vmi_align_munmap+0x2ba/0x11f0 [ 61.306749] ? lock_is_held_type+0x9f/0x120 [ 61.307136] ? __pfx_do_vmi_align_munmap+0x10/0x10 [ 61.307561] ? mtree_range_walk+0x632/0x900 [ 61.307939] ? mas_walk+0x5c7/0x7c0 [ 61.308264] do_vmi_munmap+0x1f1/0x2b0 [ 61.308601] mmap_region+0x1f9/0x2660 [ 61.308941] ? vm_mmap_pgoff+0x15c/0x3a0 [ 61.309290] ? __pfx_arch_get_unmapped_area_topdown+0x10/0x10 [ 61.309825] ? __pfx_lock_acquire+0x10/0x10 [ 61.310178] ? __pfx_mmap_region+0x10/0x10 [ 61.310534] ? security_mmap_addr+0x7d/0xa0 [ 61.310898] ? get_unmapped_area+0x1f5/0x3f0 [ 61.311278] do_mmap+0x854/0xf00 [ 61.311589] vm_mmap_pgoff+0x1a6/0x3a0 [ 61.311927] ? __pfx_vm_mmap_pgoff+0x10/0x10 [ 61.312307] ksys_mmap_pgoff+0x3af/0x500 [ 61.312641] do_syscall_64+0x3f/0x90 [ 61.312968] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 61.313415] RIP: 0033:0x7f05f0de6d82 [ 61.313789] 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 [ 61.315206] RSP: 002b:00007ffc266dbc88 EFLAGS: 00000206 ORIG_RAX: 0000000000000009 [ 61.315838] RAX: ffffffffffffffda RBX: 0000000000000812 RCX: 00007f05f0de6d82 [ 61.316426] RDX: 0000000000000005 RSI: 0000000000001000 RDI: 00007f05f0220000 [ 61.317007] RBP: 00007f05f0220000 R08: 0000000000000009 R09: 0000000000001000 [ 61.317580] R10: 0000000000000812 R11: 0000000000000206 R12: 00005561c4072ec0 [ 61.318185] R13: 00007ffc266dbca0 R14: 00007ffc266dbcd0 R15: 00007ffc266dc030 [ 61.318790] [ 61.318990] [ 61.319137] Allocated by task 213: [ 61.319429] kasan_save_stack+0x22/0x50 [ 61.319783] kasan_set_track+0x25/0x30 [ 61.320113] __kasan_slab_alloc+0x59/0x70 [ 61.320474] kmem_cache_alloc+0x16b/0x370 [ 61.320831] vm_area_dup+0x20/0x160 [ 61.321138] __split_vma+0x170/0x950 [ 61.321461] split_vma+0xc6/0x110 [ 61.321791] mprotect_fixup+0x8d2/0xb30 [ 61.322117] do_mprotect_pkey+0x87e/0xd40 [ 61.322464] __x64_sys_mprotect+0x78/0xc0 [ 61.322823] do_syscall_64+0x3f/0x90 [ 61.323151] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 61.323578] [ 61.323719] Freed by task 213: [ 61.323973] kasan_save_stack+0x22/0x50 [ 61.324303] kasan_set_track+0x25/0x30 [ 61.324622] kasan_save_free_info+0x2b/0x50 [ 61.324969] __kasan_slab_free+0x10a/0x190 [ 61.325317] kmem_cache_free+0x10d/0x4d0 [ 61.325744] rcu_core+0x8c8/0x2860 [ 61.326053] __do_softirq+0x1b7/0x7d4 [ 61.326381] [ 61.326530] Last potentially related work creation: [ 61.326930] kasan_save_stack+0x22/0x50 [ 61.327271] __kasan_record_aux_stack+0x8e/0xa0 [ 61.327652] __call_rcu_common.constprop.0+0x6a/0xb90 [ 61.328085] remove_vma+0x139/0x170 [ 61.328403] do_vmi_align_munmap+0xd4a/0x11f0 [ 61.328793] do_vmi_munmap+0x1f1/0x2b0 [ 61.329130] __vm_munmap+0x138/0x3a0 [ 61.329456] __x64_sys_munmap+0x59/0x80 [ 61.329823] do_syscall_64+0x3f/0x90 [ 61.330148] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 61.330595] [ 61.330744] The buggy address belongs to the object at ffff888009484bc8 [ 61.330744] which belongs to the cache vm_area_struct of size 168 [ 61.331759] The buggy address is located 88 bytes inside of [ 61.331759] freed 168-byte region [ffff888009484bc8, ffff888009484c70) [ 61.332691] [ 61.332841] The buggy address belongs to the physical page: [ 61.333294] page:0000000097ebf0ee refcount:1 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0x9484 [ 61.334075] memcg:ffff888009c9eb01 [ 61.334369] anon flags: 0x100000000000200(slab|node=0|zone=1) [ 61.334839] page_type: 0xffffffff() [ 61.335150] raw: 0100000000000200 ffff8880087a0c80 ffffea00005a9d40 dead000000000003 [ 61.335796] raw: 0000000000000000 0000000000110011 00000001ffffffff ffff888009c9eb01 [ 61.336423] page dumped because: kasan: bad access detected [ 61.336853] [ 61.336991] Memory state around the buggy address: [ 61.337387] ffff888009484b00: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb [ 61.338029] ffff888009484b80: fb fc fc fc fc fc fc fc fc fa fb fb fb fb fb fb [ 61.338621] >ffff888009484c00: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fc fc [ 61.339203] ^ [ 61.339549] ffff888009484c80: fc fc fc fc fc fc fa fb fb fb fb fb fb fb fb fb [ 61.340122] ffff888009484d00: fb fb fb fb fb fb fb fb fb fb fb fc fc fc fc fc [ 61.340709] ================================================================== [ 61.341452] Disabling lock debugging due to kernel taint [ 62.883704] BUG: Bad rss-counter state mm:00000000119cde02 type:MM_FILEPAGES val:33 [ 62.884800] BUG: Bad rss-counter state mm:00000000119cde02 type:MM_ANONPAGES val:22 [ 63.297384] BUG: Bad rss-counter state mm:00000000dd1dcd3e type:MM_FILEPAGES val:33 [ 63.298058] BUG: Bad rss-counter state mm:00000000dd1dcd3e type:MM_ANONPAGES val:22 Warning: Permanently added '[localhost]:62344' (ECDSA) to the list of known hosts. 2023/06/21 08:36:58 fuzzer started 2023/06/21 08:36:59 dialing manager at localhost:36067 2023/06/21 08:36:59 checking machine... 2023/06/21 08:36:59 checking revisions... [ 63.799861] kmemleak: Automatic memory scanning thread ended 2023/06/21 08:36:59 testing simple program... [ 63.836867] cgroup: Unknown subsys name 'net' [ 63.889935] cgroup: Unknown subsys name 'rlimit' executing program executing program executing program VM DIAGNOSIS: 08:36:58 Registers: info registers vcpu 0 RAX=ffff8880160bf8a8 RBX=ffff8880147d7e30 RCX=1ffff11002c17f15 RDX=dffffc0000000000 RSI=0000000000000008 RDI=ffff8880147d7e40 RBP=0000000000000006 RSP=ffff8880147d7d98 R8 =0000000000000000 R9 =fffffbfff0ba7a6a R10=ffffffff85d3d357 R11=00000000000b6d7d R12=dffffc0000000000 R13=ffff8880147d7e30 R14=ffff88806ce35000 R15=ffff8880190338a8 RIP=ffffffff8137fcd4 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 =0000 0000000000000000 00000000 00000000 DS =0000 0000000000000000 00000000 00000000 FS =0000 00007f1cb3fe0900 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=0000556133a29768 CR3=000000000d878000 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=ffffffffffffffffffffffffffffffff XMM01=30306234386136303638616663356134 XMM02=38303062343861363036386166633561 XMM03=2f6c616e72756f6a2f676f6c2f6e7572 XMM04=957f193153c969a300000000000ae988 XMM05=e77f1bfb271e464400000000001325f0 XMM06=4fda316b135da52b0000000000131690 XMM07=00000000000000000000000000000000 XMM08=415453454d49545f454d49544c414552 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=ffff888008c04400 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=00007ffddb9356f8 CR3=0000000018e44000 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=2038353a36333a3830203132206e754a XMM01=657463656e6e6f63736944203a5d3932 XMM02=302e303120746f6f722072657375206d XMM03=203a5d3932325b646873732072656c6c XMM04=69662068637573206f4e203a656c6163 XMM05=3a656c696620766e65206e65706f206f XMM06=65733a6468737328766e655f6d617020 XMM07=6b7a79732038353a36333a3830203132 XMM08=3d656e696c646d632022656369767265 XMM09=00000000000000000000000000000000 XMM10=00000000000000000000000000000000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000