syzkaller login: [ 31.014657] BUG: Bad rss-counter state mm:00000000bde85f45 type:MM_FILEPAGES val:33 [ 31.015673] BUG: Bad rss-counter state mm:00000000bde85f45 type:MM_ANONPAGES val:22 [ 31.177466] ================================================================== [ 31.178390] BUG: KASAN: slab-use-after-free in vma_interval_tree_remove+0xc75/0xec0 [ 31.179334] Read of size 8 at addr ffff8880169bd798 by task sshd/220 [ 31.180226] [ 31.180452] CPU: 0 PID: 220 Comm: sshd Not tainted 6.4.0-rc7-next-20230620 #1 [ 31.181321] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS 1.12.0-1 04/01/2014 [ 31.182316] Call Trace: [ 31.182646] [ 31.182929] dump_stack_lvl+0x91/0xf0 [ 31.183421] print_report+0xcc/0x620 [ 31.183908] ? __virt_addr_valid+0x102/0x340 [ 31.184477] ? vma_interval_tree_remove+0xc75/0xec0 [ 31.185092] ? vma_interval_tree_remove+0xc75/0xec0 [ 31.185709] kasan_report+0xbe/0xf0 [ 31.186195] ? vma_interval_tree_remove+0xc75/0xec0 [ 31.186825] vma_interval_tree_remove+0xc75/0xec0 [ 31.187431] vma_prepare+0xc54/0x11a0 [ 31.187911] __split_vma+0x5af/0x950 [ 31.188411] ? __pfx___split_vma+0x10/0x10 [ 31.188941] ? find_held_lock+0x2c/0x110 [ 31.189457] do_vmi_align_munmap+0x2ba/0x11f0 [ 31.190016] ? lock_is_held_type+0x9f/0x120 [ 31.190565] ? __pfx_do_vmi_align_munmap+0x10/0x10 [ 31.191174] ? mtree_range_walk+0x632/0x900 [ 31.191731] ? mas_walk+0x5c7/0x7c0 [ 31.192231] do_vmi_munmap+0x1f1/0x2b0 [ 31.192725] mmap_region+0x1f9/0x2660 [ 31.193205] ? asm_sysvec_apic_timer_interrupt+0x1a/0x20 [ 31.193873] ? __pfx_mmap_region+0x10/0x10 [ 31.194419] ? security_mmap_addr+0x7d/0xa0 [ 31.194963] ? get_unmapped_area+0x1f5/0x3f0 [ 31.195523] do_mmap+0x854/0xf00 [ 31.195963] vm_mmap_pgoff+0x1a6/0x3a0 [ 31.196482] ? __pfx_vm_mmap_pgoff+0x10/0x10 [ 31.197052] ksys_mmap_pgoff+0x3af/0x500 [ 31.197570] do_syscall_64+0x3f/0x90 [ 31.198055] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 31.198717] RIP: 0033:0x7f507adbbd82 [ 31.199183] 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 [ 31.201363] RSP: 002b:00007ffefc1d6278 EFLAGS: 00000206 ORIG_RAX: 0000000000000009 [ 31.202277] RAX: ffffffffffffffda RBX: 0000000000000812 RCX: 00007f507adbbd82 [ 31.203142] RDX: 0000000000000005 RSI: 0000000000001000 RDI: 00007f507a1f5000 [ 31.204002] RBP: 00007f507a1f5000 R08: 0000000000000009 R09: 0000000000001000 [ 31.204861] R10: 0000000000000812 R11: 0000000000000206 R12: 0000556cdf108ec0 [ 31.205718] R13: 00007ffefc1d6290 R14: 00007ffefc1d62c0 R15: 00007ffefc1d6620 [ 31.206581] [ 31.206873] [ 31.207092] Allocated by task 213: [ 31.207523] kasan_save_stack+0x22/0x50 [ 31.208052] kasan_set_track+0x25/0x30 [ 31.208548] __kasan_slab_alloc+0x59/0x70 [ 31.209083] kmem_cache_alloc+0x16b/0x370 [ 31.209608] vm_area_dup+0x20/0x160 [ 31.210066] __split_vma+0x170/0x950 [ 31.210533] split_vma+0xc6/0x110 [ 31.210981] mprotect_fixup+0x8d2/0xb30 [ 31.211495] do_mprotect_pkey+0x87e/0xd40 [ 31.212020] __x64_sys_mprotect+0x78/0xc0 [ 31.212548] do_syscall_64+0x3f/0x90 [ 31.213026] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 31.213671] [ 31.213889] Freed by task 203: [ 31.214285] kasan_save_stack+0x22/0x50 [ 31.214797] kasan_set_track+0x25/0x30 [ 31.215293] kasan_save_free_info+0x2b/0x50 [ 31.215835] __kasan_slab_free+0x10a/0x190 [ 31.216389] kmem_cache_free+0x10d/0x4d0 [ 31.216901] rcu_core+0x8c8/0x2860 [ 31.217348] __do_softirq+0x1b7/0x7d4 [ 31.217827] [ 31.218046] Last potentially related work creation: [ 31.218639] kasan_save_stack+0x22/0x50 [ 31.219153] __kasan_record_aux_stack+0x8e/0xa0 [ 31.219734] __call_rcu_common.constprop.0+0x6a/0xb90 [ 31.220391] remove_vma+0x139/0x170 [ 31.220847] do_vmi_align_munmap+0xd4a/0x11f0 [ 31.221414] do_vmi_munmap+0x1f1/0x2b0 [ 31.221899] __vm_munmap+0x138/0x3a0 [ 31.222366] __x64_sys_munmap+0x59/0x80 [ 31.222865] do_syscall_64+0x3f/0x90 [ 31.223343] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 31.224010] [ 31.224234] The buggy address belongs to the object at ffff8880169bd740 [ 31.224234] which belongs to the cache vm_area_struct of size 168 [ 31.225713] The buggy address is located 88 bytes inside of [ 31.225713] freed 168-byte region [ffff8880169bd740, ffff8880169bd7e8) [ 31.227132] [ 31.227352] The buggy address belongs to the physical page: [ 31.228033] page:00000000eaff0f07 refcount:1 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0x169bd [ 31.229134] memcg:ffff888018cbe301 [ 31.229568] flags: 0x100000000000200(slab|node=0|zone=1) [ 31.230221] page_type: 0xffffffff() [ 31.230680] raw: 0100000000000200 ffff8880087a0c80 dead000000000122 0000000000000000 [ 31.231613] raw: 0000000000000000 0000000000110011 00000001ffffffff ffff888018cbe301 [ 31.232534] page dumped because: kasan: bad access detected [ 31.233195] [ 31.233420] Memory state around the buggy address: [ 31.234004] ffff8880169bd680: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 [ 31.234874] ffff8880169bd700: fc fc fc fc fc fc fc fc fa fb fb fb fb fb fb fb [ 31.235734] >ffff8880169bd780: fb fb fb fb fb fb fb fb fb fb fb fb fb fc fc fc [ 31.236598] ^ [ 31.237094] ffff8880169bd800: fc fc fc fc fc fa fb fb fb fb fb fb fb fb fb fb [ 31.237951] ffff8880169bd880: fb fb fb fb fb fb fb fb fb fb fc fc fc fc fc fc [ 31.238803] ================================================================== [ 31.239783] Disabling lock debugging due to kernel taint [ 33.992697] BUG: Bad rss-counter state mm:000000009c540dba type:MM_FILEPAGES val:33 [ 33.993678] BUG: Bad rss-counter state mm:000000009c540dba type:MM_ANONPAGES val:22 [ 34.525850] BUG: Bad rss-counter state mm:000000004e8c79c8 type:MM_FILEPAGES val:33 [ 34.526889] BUG: Bad rss-counter state mm:000000004e8c79c8 type:MM_ANONPAGES val:22 Warning: Permanently added '[localhost]:62879' (ECDSA) to the list of known hosts. 2023/06/20 19:09:25 fuzzer started 2023/06/20 19:09:25 dialing manager at localhost:36067 2023/06/20 19:09:26 checking machine... 2023/06/20 19:09:26 checking revisions... [ 35.169451] kmemleak: Automatic memory scanning thread ended 2023/06/20 19:09:26 testing simple program... [ 35.215698] cgroup: Unknown subsys name 'net' [ 35.261245] cgroup: Unknown subsys name 'rlimit' executing program executing program executing program VM DIAGNOSIS: 19:09:25 Registers: info registers vcpu 0 RAX=0000000000000000 RBX=0000000000000021 RCX=ffffffff83723c94 RDX=ffff8880164f51c0 RSI=0000000000000000 RDI=0000000000000000 RBP=0000000000000022 RSP=ffff8880147d77b8 R8 =0000000000000005 R9 =000000000000006b R10=0000000000000006 R11=00000000000b6a61 R12=000000000000000a R13=ffffffff87f99be8 R14=0000000000000000 R15=0000000000000006 RIP=ffffffff814c0408 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 00007fbd0e5a7900 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=00007fbd0eb5e618 CR3=000000000ea14000 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=6e69676f6c5f6d61702c78756e696c65 XMM02=755f6d61702c74696d7265705f6d6170 XMM03=2c766e655f6d61702c7374696d696c5f XMM04=6d61702c766e655f6d61702c7374696d XMM05=78696e755f6d61702c74696d7265705f XMM06=6469756e69676f6c5f6d61702c78756e XMM07=672065736f6c635f6e6f69737365733a XMM08=61662029286e65706f5f746964756100 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=00007f95ce58d300 CR3=000000000f1f2000 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=2035323a39303a3931203032206e754a XMM01=73732878696e755f6d6170203a5d3932 XMM02=65736f6c63206e6f6973736573203a29 XMM03=755f6d6170203a5d3932325b64687373 XMM04=69662068637573206f4e203a656c6163 XMM05=3a656c696620766e65206e65706f206f XMM06=65733a6468737328766e655f6d617020 XMM07=6b7a79732035323a39303a3931203032 XMM08=3d656e696c646d632022656369767265 XMM09=00000000000000000000000000000000 XMM10=00000000000000000000000000000000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000