[ 30.544801] BUG: Bad rss-counter state mm:0000000086fbe40c type:MM_FILEPAGES val:33 [ 30.545762] BUG: Bad rss-counter state mm:0000000086fbe40c type:MM_ANONPAGES val:22 [ 30.581800] ================================================================== [ 30.583080] BUG: KASAN: slab-use-after-free in vma_interval_tree_remove+0xc75/0xec0 [ 30.584337] Read of size 8 at addr ffff88800cde8798 by task sshd/219 [ 30.585568] [ 30.585877] CPU: 1 PID: 219 Comm: sshd Not tainted 6.4.0-rc7-next-20230620 #1 [ 30.586909] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS 1.12.0-1 04/01/2014 [ 30.588202] Call Trace: [ 30.588609] [ 30.588965] dump_stack_lvl+0x91/0xf0 [ 30.589592] print_report+0xcc/0x620 [ 30.590198] ? __virt_addr_valid+0x102/0x340 [ 30.590894] ? vma_interval_tree_remove+0xc75/0xec0 [ 30.591656] ? vma_interval_tree_remove+0xc75/0xec0 [ 30.592445] kasan_report+0xbe/0xf0 [ 30.593031] ? vma_interval_tree_remove+0xc75/0xec0 [ 30.593815] vma_interval_tree_remove+0xc75/0xec0 [ 30.594575] vma_prepare+0xc54/0x11a0 [ 30.595184] __split_vma+0x5af/0x950 [ 30.595783] ? __pfx___split_vma+0x10/0x10 [ 30.596461] ? find_held_lock+0x2c/0x110 [ 30.597127] do_vmi_align_munmap+0x2ba/0x11f0 [ 30.597832] ? lock_is_held_type+0x9f/0x120 [ 30.598499] ? __pfx_do_vmi_align_munmap+0x10/0x10 [ 30.599256] ? mtree_range_walk+0x632/0x900 [ 30.599939] ? mas_walk+0x5c7/0x7c0 [ 30.600552] do_vmi_munmap+0x1f1/0x2b0 [ 30.601157] mmap_region+0x1f9/0x2660 [ 30.601641] ? vm_mmap_pgoff+0x15c/0x3a0 [ 30.602162] ? __pfx_arch_get_unmapped_area_topdown+0x10/0x10 [ 30.602880] ? __pfx_lock_acquire+0x10/0x10 [ 30.603416] ? __pfx_mmap_region+0x10/0x10 [ 30.603941] ? security_mmap_addr+0x7d/0xa0 [ 30.604496] ? get_unmapped_area+0x1f5/0x3f0 [ 30.605045] do_mmap+0x854/0xf00 [ 30.605489] vm_mmap_pgoff+0x1a6/0x3a0 [ 30.605983] ? __pfx_vm_mmap_pgoff+0x10/0x10 [ 30.606546] ksys_mmap_pgoff+0x3af/0x500 [ 30.607051] do_syscall_64+0x3f/0x90 [ 30.607530] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 30.608185] RIP: 0033:0x7f249e099d82 [ 30.608647] 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 [ 30.610760] RSP: 002b:00007fff163ebdb8 EFLAGS: 00000206 ORIG_RAX: 0000000000000009 [ 30.611661] RAX: ffffffffffffffda RBX: 0000000000000812 RCX: 00007f249e099d82 [ 30.612520] RDX: 0000000000000005 RSI: 0000000000001000 RDI: 00007f249d4d3000 [ 30.613360] RBP: 00007f249d4d3000 R08: 0000000000000009 R09: 0000000000001000 [ 30.614203] R10: 0000000000000812 R11: 0000000000000206 R12: 00005570ed44bec0 [ 30.615037] R13: 00007fff163ebdd0 R14: 00007fff163ebe00 R15: 00007fff163ec160 [ 30.615893] [ 30.616194] [ 30.616408] Allocated by task 212: [ 30.616837] kasan_save_stack+0x22/0x50 [ 30.617340] kasan_set_track+0x25/0x30 [ 30.617833] __kasan_slab_alloc+0x59/0x70 [ 30.618357] kmem_cache_alloc+0x16b/0x370 [ 30.618873] vm_area_dup+0x20/0x160 [ 30.619327] __split_vma+0x170/0x950 [ 30.619794] split_vma+0xc6/0x110 [ 30.620251] mprotect_fixup+0x8d2/0xb30 [ 30.620758] do_mprotect_pkey+0x87e/0xd40 [ 30.621287] __x64_sys_mprotect+0x78/0xc0 [ 30.621810] do_syscall_64+0x3f/0x90 [ 30.622288] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 30.622931] [ 30.623146] Freed by task 212: [ 30.623542] kasan_save_stack+0x22/0x50 [ 30.624044] kasan_set_track+0x25/0x30 [ 30.624549] kasan_save_free_info+0x2b/0x50 [ 30.625084] __kasan_slab_free+0x10a/0x190 [ 30.625623] kmem_cache_free+0x10d/0x4d0 [ 30.626131] rcu_core+0x8c8/0x2860 [ 30.626578] __do_softirq+0x1b7/0x7d4 [ 30.627170] [ 30.627388] Last potentially related work creation: [ 30.627977] kasan_save_stack+0x22/0x50 [ 30.628501] __kasan_record_aux_stack+0x8e/0xa0 [ 30.629076] __call_rcu_common.constprop.0+0x6a/0xb90 [ 30.629718] remove_vma+0x139/0x170 [ 30.630170] do_vmi_align_munmap+0xd4a/0x11f0 [ 30.630736] do_vmi_munmap+0x1f1/0x2b0 [ 30.631229] __vm_munmap+0x138/0x3a0 [ 30.631697] __x64_sys_munmap+0x59/0x80 [ 30.632199] do_syscall_64+0x3f/0x90 [ 30.632675] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 30.633328] [ 30.633543] The buggy address belongs to the object at ffff88800cde8740 [ 30.633543] which belongs to the cache vm_area_struct of size 168 [ 30.635004] The buggy address is located 88 bytes inside of [ 30.635004] freed 168-byte region [ffff88800cde8740, ffff88800cde87e8) [ 30.636420] [ 30.636640] The buggy address belongs to the physical page: [ 30.637299] page:00000000b2daa17c refcount:1 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0xcde8 [ 30.638377] memcg:ffff88800dff4801 [ 30.638805] anon flags: 0x100000000000200(slab|node=0|zone=1) [ 30.639504] page_type: 0xffffffff() [ 30.639953] raw: 0100000000000200 ffff8880087a0c80 0000000000000000 dead000000000001 [ 30.640916] raw: 0000000000000000 0000000000110011 00000001ffffffff ffff88800dff4801 [ 30.641830] page dumped because: kasan: bad access detected [ 30.642493] [ 30.642711] Memory state around the buggy address: [ 30.643300] ffff88800cde8680: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 [ 30.644162] ffff88800cde8700: fc fc fc fc fc fc fc fc fa fb fb fb fb fb fb fb [ 30.645019] >ffff88800cde8780: fb fb fb fb fb fb fb fb fb fb fb fb fb fc fc fc [ 30.645870] ^ [ 30.646363] ffff88800cde8800: fc fc fc fc fc 00 00 00 00 00 00 00 00 00 00 00 [ 30.647225] ffff88800cde8880: 00 00 00 00 00 00 00 00 00 00 fc fc fc fc fc fc [ 30.648094] ================================================================== [ 30.649138] Disabling lock debugging due to kernel taint Debian GNU/Linux 11 syzkaller ttyS0 syzkaller login: [ 33.011742] BUG: Bad rss-counter state mm:00000000174273bc type:MM_FILEPAGES val:33 [ 33.012764] BUG: Bad rss-counter state mm:00000000174273bc type:MM_ANONPAGES val:22 [ 33.518874] BUG: Bad rss-counter state mm:00000000844b1b47 type:MM_FILEPAGES val:33 [ 33.520058] BUG: Bad rss-counter state mm:00000000844b1b47 type:MM_ANONPAGES val:22 Warning: Permanently added '[localhost]:9276' (ECDSA) to the list of known hosts. 2023/06/20 12:45:11 fuzzer started 2023/06/20 12:45:12 dialing manager at localhost:36067 2023/06/20 12:45:12 checking machine... 2023/06/20 12:45:12 checking revisions... [ 34.231868] kmemleak: Automatic memory scanning thread ended 2023/06/20 12:45:12 testing simple program... [ 34.271455] cgroup: Unknown subsys name 'net' [ 34.310938] cgroup: Unknown subsys name 'rlimit' executing program executing program executing program VM DIAGNOSIS: 12:45:11 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=00007fff2487b3a8 CR3=0000000015a12000 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=2031313a35343a3231203032206e754a XMM01=657463656e6e6f63736944203a5d3832 XMM02=302e303120746f6f722072657375206d XMM03=203a5d3832325b646873732072656c6c XMM04=69662068637573206f4e203a656c6163 XMM05=3a656c696620766e65206e65706f206f XMM06=65733a6468737328766e655f6d617020 XMM07=6b7a79732031313a35343a3231203032 XMM08=69767265733d7373616c63742030733a XMM09=00000000000000000000000000000000 XMM10=00000000000000000000000000000000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000 info registers vcpu 1 RAX=0000000000000000 RBX=0000000000000001 RCX=ffffffff860d8256 RDX=1ffff1100341af3b RSI=0000000000000000 RDI=0000000000000001 RBP=ffff88801a0d7a30 RSP=ffff88801a0d7968 R8 =ffffffff860d825a R9 =ffff88801a0d7a18 R10=0000000000038001 R11=0000000000010b8d R12=ffff88801a0d7a38 R13=ffff88801a0d7a20 R14=ffff88801a0d7b10 R15=ffff88801a0d79d8 RIP=ffffffff81131271 RFL=00000212 [----A--] 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 00007f7024a92900 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=00007f7025049618 CR3=00000000158be000 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=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