syzkaller login: [ 34.076540] BUG: Bad rss-counter state mm:00000000b21106bf type:MM_FILEPAGES val:33 [ 34.077859] BUG: Bad rss-counter state mm:00000000b21106bf type:MM_ANONPAGES val:22 [ 34.239819] ================================================================== [ 34.240714] BUG: KASAN: slab-use-after-free in vma_interval_tree_remove+0xc75/0xec0 [ 34.241628] Read of size 8 at addr ffff88800e727880 by task sshd/220 [ 34.242402] [ 34.242611] CPU: 1 PID: 220 Comm: sshd Not tainted 6.4.0-rc7-next-20230619 #1 [ 34.243561] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS 1.12.0-1 04/01/2014 [ 34.244528] Call Trace: [ 34.244861] [ 34.245135] dump_stack_lvl+0x91/0xf0 [ 34.245602] print_report+0xcc/0x620 [ 34.246079] ? __virt_addr_valid+0x102/0x340 [ 34.246597] ? vma_interval_tree_remove+0xc75/0xec0 [ 34.247205] ? vma_interval_tree_remove+0xc75/0xec0 [ 34.247825] kasan_report+0xbe/0xf0 [ 34.248285] ? vma_interval_tree_remove+0xc75/0xec0 [ 34.248902] vma_interval_tree_remove+0xc75/0xec0 [ 34.249494] vma_prepare+0xc54/0x11a0 [ 34.249981] __split_vma+0x5af/0x950 [ 34.250444] ? __pfx___split_vma+0x10/0x10 [ 34.250984] ? find_held_lock+0x2c/0x110 [ 34.251517] do_vmi_align_munmap+0x2ba/0x11f0 [ 34.252125] ? lock_is_held_type+0x9f/0x120 [ 34.252648] ? __pfx_do_vmi_align_munmap+0x10/0x10 [ 34.253310] ? mtree_range_walk+0x632/0x900 [ 34.253862] ? mas_walk+0x5c7/0x7c0 [ 34.254320] do_vmi_munmap+0x1f1/0x2b0 [ 34.254816] mmap_region+0x1f9/0x2660 [ 34.255286] ? vm_mmap_pgoff+0x15c/0x3a0 [ 34.255815] ? __pfx_arch_get_unmapped_area_topdown+0x10/0x10 [ 34.256503] ? __pfx_lock_acquire+0x10/0x10 [ 34.257073] ? __pfx_mmap_region+0x10/0x10 [ 34.257593] ? security_mmap_addr+0x7d/0xa0 [ 34.258139] ? get_unmapped_area+0x1f5/0x3f0 [ 34.258675] do_mmap+0x854/0xf00 [ 34.259120] vm_mmap_pgoff+0x1a6/0x3a0 [ 34.259613] ? __pfx_vm_mmap_pgoff+0x10/0x10 [ 34.260180] ksys_mmap_pgoff+0x3af/0x500 [ 34.260681] do_syscall_64+0x3f/0x90 [ 34.261165] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 34.261819] RIP: 0033:0x7f8dac5d8d82 [ 34.262270] 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 [ 34.264409] RSP: 002b:00007ffed83b1468 EFLAGS: 00000206 ORIG_RAX: 0000000000000009 [ 34.265318] RAX: ffffffffffffffda RBX: 0000000000000812 RCX: 00007f8dac5d8d82 [ 34.266181] RDX: 0000000000000005 RSI: 0000000000001000 RDI: 00007f8daba12000 [ 34.267020] RBP: 00007f8daba12000 R08: 0000000000000009 R09: 0000000000001000 [ 34.267893] R10: 0000000000000812 R11: 0000000000000206 R12: 000055b297577f70 [ 34.268702] R13: 00007ffed83b1480 R14: 00007ffed83b14b0 R15: 00007ffed83b1810 [ 34.269533] [ 34.269829] [ 34.270035] Allocated by task 213: [ 34.270444] kasan_save_stack+0x22/0x50 [ 34.270942] kasan_set_track+0x25/0x30 [ 34.271438] __kasan_slab_alloc+0x59/0x70 [ 34.271952] kmem_cache_alloc+0x16b/0x370 [ 34.272442] vm_area_dup+0x20/0x160 [ 34.272886] __split_vma+0x170/0x950 [ 34.273333] split_vma+0xc6/0x110 [ 34.273791] mprotect_fixup+0x8d2/0xb30 [ 34.274295] do_mprotect_pkey+0x87e/0xd40 [ 34.274830] __x64_sys_mprotect+0x78/0xc0 [ 34.275356] do_syscall_64+0x3f/0x90 [ 34.275858] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 34.276488] [ 34.276709] Freed by task 213: [ 34.277100] kasan_save_stack+0x22/0x50 [ 34.277600] kasan_set_track+0x25/0x30 [ 34.278107] kasan_save_free_info+0x2b/0x50 [ 34.278629] __kasan_slab_free+0x10a/0x190 [ 34.279190] kmem_cache_free+0x10d/0x4d0 [ 34.279727] rcu_core+0x8c8/0x2860 [ 34.280163] __do_softirq+0x1b7/0x7d4 [ 34.280635] [ 34.280866] Last potentially related work creation: [ 34.281449] kasan_save_stack+0x22/0x50 [ 34.281969] __kasan_record_aux_stack+0x8e/0xa0 [ 34.282536] __call_rcu_common.constprop.0+0x6a/0xb90 [ 34.283214] remove_vma+0x139/0x170 [ 34.283687] do_vmi_align_munmap+0xd4a/0x11f0 [ 34.284300] do_vmi_munmap+0x1f1/0x2b0 [ 34.284802] __vm_munmap+0x138/0x3a0 [ 34.285277] __x64_sys_munmap+0x59/0x80 [ 34.285781] do_syscall_64+0x3f/0x90 [ 34.286255] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 34.286906] [ 34.287114] The buggy address belongs to the object at ffff88800e727828 [ 34.287114] which belongs to the cache vm_area_struct of size 168 [ 34.288626] The buggy address is located 88 bytes inside of [ 34.288626] freed 168-byte region [ffff88800e727828, ffff88800e7278d0) [ 34.290076] [ 34.290338] The buggy address belongs to the physical page: [ 34.291042] page:00000000797e6186 refcount:1 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0xe727 [ 34.292177] memcg:ffff88800d637401 [ 34.292607] anon flags: 0x100000000000200(slab|node=0|zone=1) [ 34.293323] page_type: 0xffffffff() [ 34.293776] raw: 0100000000000200 ffff88800879fc80 ffffea00003ad480 dead000000000005 [ 34.294694] raw: 0000000000000000 0000000000110011 00000001ffffffff ffff88800d637401 [ 34.295620] page dumped because: kasan: bad access detected [ 34.296287] [ 34.296508] Memory state around the buggy address: [ 34.297087] ffff88800e727780: fb fb fb fb fb fb fb fb fb fb fb fb fb fc fc fc [ 34.297938] ffff88800e727800: fc fc fc fc fc fa fb fb fb fb fb fb fb fb fb fb [ 34.298782] >ffff88800e727880: fb fb fb fb fb fb fb fb fb fb fc fc fc fc fc fc [ 34.299651] ^ [ 34.300053] ffff88800e727900: fc fc 00 00 00 00 00 00 00 00 00 00 00 00 00 00 [ 34.300905] ffff88800e727980: 00 00 00 00 00 00 00 fc fc fc fc fc fc fc fc 00 [ 34.301750] ================================================================== [ 34.302748] Disabling lock debugging due to kernel taint [ 36.492949] BUG: Bad rss-counter state mm:00000000492ae8d3 type:MM_FILEPAGES val:33 [ 36.493994] BUG: Bad rss-counter state mm:00000000492ae8d3 type:MM_ANONPAGES val:22 [ 36.994777] BUG: Bad rss-counter state mm:0000000048db0522 type:MM_FILEPAGES val:33 [ 36.996049] BUG: Bad rss-counter state mm:0000000048db0522 type:MM_ANONPAGES val:22 Warning: Permanently added '[localhost]:43191' (ECDSA) to the list of known hosts. 2023/06/20 06:08:39 fuzzer started 2023/06/20 06:08:39 dialing manager at localhost:44161 2023/06/20 06:08:39 checking machine... 2023/06/20 06:08:39 checking revisions... [ 37.722542] kmemleak: Automatic memory scanning thread ended 2023/06/20 06:08:39 testing simple program... [ 37.763491] cgroup: Unknown subsys name 'net' [ 37.803128] cgroup: Unknown subsys name 'rlimit' executing program executing program executing program VM DIAGNOSIS: 06:08:36 Registers: info registers vcpu 0 RAX=ffff88806ce35000 RBX=0000000000000000 RCX=ffffffff8450c50e RDX=ffffed100d9c6a01 RSI=0000000000000004 RDI=ffffffff812889a5 RBP=dffffc0000000000 RSP=ffffffff85407e10 R8 =0000000000000000 R9 =ffffed100d9c6a00 R10=ffff88806ce35003 R11=ffff888008c58000 R12=ffffffff85d3bed0 R13=1ffffffff0a80fc7 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 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=00007f6abe6fa650 CR3=000000000fc1e000 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=2038333a38303a3630203032206e754a XMM01=657463656e6e6f63736944203a5d3932 XMM02=302e303120746f6f722072657375206d XMM03=203a5d3932325b646873732072656c6c XMM04=69662068637573206f4e203a656c6163 XMM05=3a656c696620766e65206e65706f206f XMM06=65733a6468737328766e655f6d617020 XMM07=6b7a79732038333a38303a3630203032 XMM08=3d656e696c646d632022656369767265 XMM09=00000000000000000000000000000000 XMM10=00000000000000000000000000000000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000 info registers vcpu 1 RAX=0000000005b9013c RBX=0000000000000058 RCX=1ffff11001b4a6fd RDX=0000000000000000 RSI=ffffffff846000aa RDI=ffffffff856d8220 RBP=ffffffff856d8220 RSP=ffff888015c177e0 R8 =00000000d9cf9170 R9 =fffffbfff0ba77da R10=ffffffff85d3bed7 R11=00000000000b6996 R12=0000000000000246 R13=0000000000000000 R14=ffff88800da53768 R15=ffff88800da53720 RIP=ffffffff8452fd0d 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 00007fa53b317900 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=00007fa53a788a40 CR3=000000000d8ec000 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=756f6a2f646d65747379732f6e75722f XMM01=00676f6c7379732f6c616e72756f6a2f XMM02=756f6a2f646d65747379732f6e75722f XMM03=006c616e72756f6a2f646d6574737973 XMM04=60f8eed30581a52400000000000ae988 XMM05=7ede1bb058ce23870000000000135128 XMM06=4fda316b135da52b0000000000133f18 XMM07=fb795ef6d657705600000000001244a0 XMM08=4f5453444600273d67736d000d0a0920 XMM09=00000000000000000000000000000000 XMM10=00000000000000000000000000000000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000