[ 31.338311] BUG: Bad rss-counter state mm:000000005853acd4 type:MM_FILEPAGES val:33 [ 31.339549] BUG: Bad rss-counter state mm:000000005853acd4 type:MM_ANONPAGES val:22 Debian GNU/Linux 11 syzkaller ttyS0 syzkaller login: [ 31.474135] ================================================================== [ 31.475066] BUG: KASAN: slab-use-after-free in vma_interval_tree_remove+0xc75/0xec0 [ 31.476033] Read of size 8 at addr ffff88800eb5d228 by task sshd/219 [ 31.476826] [ 31.477048] CPU: 0 PID: 219 Comm: sshd Not tainted 6.4.0-rc7-next-20230620 #1 [ 31.478000] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS 1.12.0-1 04/01/2014 [ 31.479009] Call Trace: [ 31.479325] <TASK> [ 31.479646] dump_stack_lvl+0x91/0xf0 [ 31.480166] print_report+0xcc/0x620 [ 31.480654] ? __virt_addr_valid+0x102/0x340 [ 31.481205] ? vma_interval_tree_remove+0xc75/0xec0 [ 31.481812] ? vma_interval_tree_remove+0xc75/0xec0 [ 31.482430] kasan_report+0xbe/0xf0 [ 31.482952] ? vma_interval_tree_remove+0xc75/0xec0 [ 31.483596] vma_interval_tree_remove+0xc75/0xec0 [ 31.484196] vma_prepare+0xc54/0x11a0 [ 31.484681] __split_vma+0x5af/0x950 [ 31.485159] ? __pfx___split_vma+0x10/0x10 [ 31.485696] ? find_held_lock+0x2c/0x110 [ 31.486222] do_vmi_align_munmap+0x2ba/0x11f0 [ 31.486824] ? lock_is_held_type+0x9f/0x120 [ 31.487383] ? __pfx_do_vmi_align_munmap+0x10/0x10 [ 31.487988] ? mtree_range_walk+0x632/0x900 [ 31.488541] ? mas_walk+0x5c7/0x7c0 [ 31.489019] do_vmi_munmap+0x1f1/0x2b0 [ 31.489510] mmap_region+0x1f9/0x2660 [ 31.489986] ? vm_mmap_pgoff+0x15c/0x3a0 [ 31.490498] ? __pfx_arch_get_unmapped_area_topdown+0x10/0x10 [ 31.491251] ? __pfx_lock_acquire+0x10/0x10 [ 31.491813] ? __pfx_mmap_region+0x10/0x10 [ 31.492340] ? security_mmap_addr+0x7d/0xa0 [ 31.492873] ? get_unmapped_area+0x1f5/0x3f0 [ 31.493418] do_mmap+0x854/0xf00 [ 31.493855] vm_mmap_pgoff+0x1a6/0x3a0 [ 31.494355] ? __pfx_vm_mmap_pgoff+0x10/0x10 [ 31.494953] ksys_mmap_pgoff+0x3af/0x500 [ 31.495462] do_syscall_64+0x3f/0x90 [ 31.495953] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 31.496609] RIP: 0033:0x7fc4c695bd82 [ 31.497096] 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 [ 31.499292] RSP: 002b:00007ffca591ecf8 EFLAGS: 00000206 ORIG_RAX: 0000000000000009 [ 31.500239] RAX: ffffffffffffffda RBX: 0000000000000812 RCX: 00007fc4c695bd82 [ 31.501099] RDX: 0000000000000005 RSI: 0000000000001000 RDI: 00007fc4c5d95000 [ 31.501972] RBP: 00007fc4c5d95000 R08: 0000000000000009 R09: 0000000000001000 [ 31.502867] R10: 0000000000000812 R11: 0000000000000206 R12: 0000557e86612ec0 [ 31.503736] R13: 00007ffca591ed10 R14: 00007ffca591ed40 R15: 00007ffca591f0a0 [ 31.504601] </TASK> [ 31.504899] [ 31.505118] Allocated by task 212: [ 31.505548] kasan_save_stack+0x22/0x50 [ 31.506055] kasan_set_track+0x25/0x30 [ 31.506551] __kasan_slab_alloc+0x59/0x70 [ 31.507112] kmem_cache_alloc+0x16b/0x370 [ 31.507649] vm_area_dup+0x20/0x160 [ 31.508102] __split_vma+0x170/0x950 [ 31.508565] split_vma+0xc6/0x110 [ 31.509004] mprotect_fixup+0x8d2/0xb30 [ 31.509507] do_mprotect_pkey+0x87e/0xd40 [ 31.510027] __x64_sys_mprotect+0x78/0xc0 [ 31.510549] do_syscall_64+0x3f/0x90 [ 31.511059] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 31.511744] [ 31.511978] Freed by task 212: [ 31.512370] kasan_save_stack+0x22/0x50 [ 31.512873] kasan_set_track+0x25/0x30 [ 31.513373] kasan_save_free_info+0x2b/0x50 [ 31.513914] __kasan_slab_free+0x10a/0x190 [ 31.514452] kmem_cache_free+0x10d/0x4d0 [ 31.514967] rcu_core+0x8c8/0x2860 [ 31.515428] __do_softirq+0x1b7/0x7d4 [ 31.515948] [ 31.516166] Last potentially related work creation: [ 31.516748] kasan_save_stack+0x22/0x50 [ 31.517247] __kasan_record_aux_stack+0x8e/0xa0 [ 31.517837] __call_rcu_common.constprop.0+0x6a/0xb90 [ 31.518485] remove_vma+0x139/0x170 [ 31.518938] do_vmi_align_munmap+0xd4a/0x11f0 [ 31.519516] do_vmi_munmap+0x1f1/0x2b0 [ 31.520038] __vm_munmap+0x138/0x3a0 [ 31.520510] __x64_sys_munmap+0x59/0x80 [ 31.521000] do_syscall_64+0x3f/0x90 [ 31.521471] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 31.522136] [ 31.522351] Second to last potentially related work creation: [ 31.523065] kasan_save_stack+0x22/0x50 [ 31.523598] __kasan_record_aux_stack+0x8e/0xa0 [ 31.524223] __call_rcu_common.constprop.0+0x6a/0xb90 [ 31.524889] remove_vma+0x139/0x170 [ 31.525352] do_vmi_align_munmap+0xd4a/0x11f0 [ 31.525925] do_vmi_munmap+0x1f1/0x2b0 [ 31.526419] mmap_region+0x1f9/0x2660 [ 31.526914] do_mmap+0x854/0xf00 [ 31.527352] vm_mmap_pgoff+0x1a6/0x3a0 [ 31.527901] ksys_mmap_pgoff+0x3af/0x500 [ 31.528411] do_syscall_64+0x3f/0x90 [ 31.528887] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 31.529547] [ 31.529767] The buggy address belongs to the object at ffff88800eb5d1d0 [ 31.529767] which belongs to the cache vm_area_struct of size 168 [ 31.531248] The buggy address is located 88 bytes inside of [ 31.531248] freed 168-byte region [ffff88800eb5d1d0, ffff88800eb5d278) [ 31.532704] [ 31.532923] The buggy address belongs to the physical page: [ 31.533606] page:00000000d31d8fed refcount:1 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0xeb5d [ 31.534736] memcg:ffff88800f305901 [ 31.535174] anon flags: 0x100000000000200(slab|node=0|zone=1) [ 31.535929] page_type: 0xffffffff() [ 31.536376] raw: 0100000000000200 ffff8880087a0c80 ffffea000025c900 dead000000000007 [ 31.537273] raw: 0000000000000000 0000000000110011 00000001ffffffff ffff88800f305901 [ 31.538171] page dumped because: kasan: bad access detected [ 31.538816] [ 31.539035] Memory state around the buggy address: [ 31.539641] ffff88800eb5d100: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb [ 31.540524] ffff88800eb5d180: fb fb fc fc fc fc fc fc fc fc fa fb fb fb fb fb [ 31.541364] >ffff88800eb5d200: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fc [ 31.542199] ^ [ 31.542751] ffff88800eb5d280: fc fc fc fc fc fc fc fa fb fb fb fb fb fb fb fb [ 31.543643] ffff88800eb5d300: fb fb fb fb fb fb fb fb fb fb fb fb fc fc fc fc [ 31.544553] ================================================================== [ 31.545529] Disabling lock debugging due to kernel taint [ 33.474682] BUG: Bad rss-counter state mm:00000000391a5e8b type:MM_FILEPAGES val:33 [ 33.475868] BUG: Bad rss-counter state mm:00000000391a5e8b type:MM_ANONPAGES val:22 [ 33.916445] BUG: Bad rss-counter state mm:00000000e1721336 type:MM_FILEPAGES val:31 [ 33.917435] BUG: Bad rss-counter state mm:00000000e1721336 type:MM_ANONPAGES val:22 Warning: Permanently added '[localhost]:32701' (ECDSA) to the list of known hosts. 2023/06/21 03:31:31 fuzzer started 2023/06/21 03:31:31 dialing manager at localhost:36067 2023/06/21 03:31:31 checking machine... 2023/06/21 03:31:31 checking revisions... [ 34.605290] kmemleak: Automatic memory scanning thread ended 2023/06/21 03:31:31 testing simple program... [ 34.647146] cgroup: Unknown subsys name 'net' [ 34.723505] cgroup: Unknown subsys name 'rlimit' executing program executing program executing program VM DIAGNOSIS: 03:31:31 Registers: info registers vcpu 0 RAX=ffff88806ce35000 RBX=0000000000000000 RCX=ffffffff8451250e RDX=ffffed100d9c6a01 RSI=0000000000000004 RDI=ffffffff81288ac5 RBP=dffffc0000000000 RSP=ffffffff85407e10 R8 =0000000000000000 R9 =ffffed100d9c6a00 R10=ffff88806ce35003 R11=ffff888008c04000 R12=ffffffff85d3d350 R13=1ffffffff0a80fc7 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 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=00007f00bd1c3670 CR3=0000000010240000 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=2030333a31333a3330203132206e754a XMM01=73732878696e755f6d6170203a5d3832 XMM02=65736f6c63206e6f6973736573203a29 XMM03=755f6d6170203a5d3832325b64687373 XMM04=69662068637573206f4e203a656c6163 XMM05=3a656c696620766e65206e65706f206f XMM06=65733a6468737328766e655f6d617020 XMM07=6b7a79732030333a31333a3330203132 XMM08=3d656e696c646d632022656369767265 XMM09=00000000000000000000000000000000 XMM10=00000000000000000000000000000000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000 info registers vcpu 1 RAX=0000000000000001 RBX=0000000000000282 RCX=0000000080070006 RDX=0000000000000001 RSI=ffffea000063f800 RDI=ffff8880087b83c0 RBP=0000000000000000 RSP=ffff888015eafa00 R8 =0000000080070006 R9 =0000000000000000 R10=ffffea000063f800 R11=0000000000070006 R12=ffff8880087b83c0 R13=ffffea000063f800 R14=ffff8880087b83c0 R15=0000000000000001 RIP=ffffffff81806246 RFL=00000082 [--S----] 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 00007fd98b024900 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=00007ffff64fc000 CR3=00000000199b6000 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=6720646572637465733a4d41503d706f XMM01=652022746f6f72223d74636361207469 XMM02=3d6c616e696d72657420322e322e302e XMM03=3d656d616e74736f682022646873732f XMM04=40404040404040404040404040404040 XMM05=5a5a5a5a5a5a5a5a5a5a5a5a5a5a5a5a XMM06=20202020202020202020202020202020 XMM07=00000000000000000000000000000000 XMM08=652075253d64692073253d706f000000 XMM09=00000000000000000000000000000000 XMM10=00000000000000000000000000000000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000