[ 31.226046] BUG: Bad rss-counter state mm:00000000a75be200 type:MM_FILEPAGES val:33 [ 31.226697] BUG: Bad rss-counter state mm:00000000a75be200 type:MM_ANONPAGES val:22 [ 31.410705] ================================================================== [ 31.411631] BUG: KASAN: slab-use-after-free in vma_interval_tree_remove+0xc75/0xec0 [ 31.412263] Read of size 8 at addr ffff8880145a6880 by task sshd/222 [ 31.412776] [ 31.412931] CPU: 0 PID: 222 Comm: sshd Not tainted 6.4.0-rc7-next-20230619 #1 [ 31.413501] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS 1.12.0-1 04/01/2014 [ 31.414151] Call Trace: [ 31.414368] [ 31.414559] dump_stack_lvl+0x91/0xf0 [ 31.414903] print_report+0xcc/0x620 [ 31.415233] ? __virt_addr_valid+0x102/0x340 [ 31.415653] ? vma_interval_tree_remove+0xc75/0xec0 [ 31.416071] ? vma_interval_tree_remove+0xc75/0xec0 [ 31.416487] kasan_report+0xbe/0xf0 [ 31.416809] ? vma_interval_tree_remove+0xc75/0xec0 [ 31.417229] vma_interval_tree_remove+0xc75/0xec0 [ 31.417636] vma_prepare+0xc54/0x11a0 [ 31.417966] __split_vma+0x5af/0x950 [ 31.418288] ? __pfx___split_vma+0x10/0x10 [ 31.418646] ? find_held_lock+0x2c/0x110 [ 31.419010] do_vmi_align_munmap+0x2ba/0x11f0 [ 31.419389] ? lock_is_held_type+0x9f/0x120 [ 31.419804] ? __pfx_do_vmi_align_munmap+0x10/0x10 [ 31.420218] ? mtree_range_walk+0x632/0x900 [ 31.420593] ? mas_walk+0x5c7/0x7c0 [ 31.420918] do_vmi_munmap+0x1f1/0x2b0 [ 31.421252] mmap_region+0x1f9/0x2660 [ 31.421589] ? vm_mmap_pgoff+0x15c/0x3a0 [ 31.421938] ? __pfx_arch_get_unmapped_area_topdown+0x10/0x10 [ 31.422416] ? __pfx_lock_acquire+0x10/0x10 [ 31.422778] ? __pfx_mmap_region+0x10/0x10 [ 31.423142] ? security_mmap_addr+0x7d/0xa0 [ 31.423549] ? get_unmapped_area+0x1f5/0x3f0 [ 31.423919] do_mmap+0x854/0xf00 [ 31.424219] vm_mmap_pgoff+0x1a6/0x3a0 [ 31.424552] ? __pfx_vm_mmap_pgoff+0x10/0x10 [ 31.424996] ksys_mmap_pgoff+0x3af/0x500 [ 31.425344] do_syscall_64+0x3f/0x90 [ 31.425683] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 31.426133] RIP: 0033:0x7efe667b4d82 [ 31.426455] 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 [ 31.427959] RSP: 002b:00007ffeba5dad78 EFLAGS: 00000206 ORIG_RAX: 0000000000000009 [ 31.428574] RAX: ffffffffffffffda RBX: 0000000000000812 RCX: 00007efe667b4d82 [ 31.429157] RDX: 0000000000000005 RSI: 0000000000001000 RDI: 00007efe65bee000 [ 31.429733] RBP: 00007efe65bee000 R08: 0000000000000009 R09: 0000000000001000 [ 31.430316] R10: 0000000000000812 R11: 0000000000000206 R12: 00005591b1bb8f70 [ 31.430904] R13: 00007ffeba5dad90 R14: 00007ffeba5dadc0 R15: 00007ffeba5db120 [ 31.431559] [ 31.431764] [ 31.431923] Allocated by task 213: [ 31.432226] kasan_save_stack+0x22/0x50 [ 31.432591] kasan_set_track+0x25/0x30 [ 31.432942] __kasan_slab_alloc+0x59/0x70 [ 31.433309] kmem_cache_alloc+0x16b/0x370 [ 31.433671] vm_area_dup+0x20/0x160 [ 31.433982] __split_vma+0x170/0x950 [ 31.434312] split_vma+0xc6/0x110 [ 31.434622] mprotect_fixup+0x8d2/0xb30 [ 31.434977] do_mprotect_pkey+0x87e/0xd40 [ 31.435341] __x64_sys_mprotect+0x78/0xc0 [ 31.435762] do_syscall_64+0x3f/0x90 [ 31.436096] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 31.436548] [ 31.436704] Freed by task 211: [ 31.436976] kasan_save_stack+0x22/0x50 [ 31.437332] kasan_set_track+0x25/0x30 [ 31.437680] kasan_save_free_info+0x2b/0x50 [ 31.438057] __kasan_slab_free+0x10a/0x190 [ 31.438433] kmem_cache_free+0x10d/0x4d0 [ 31.438788] rcu_core+0x8c8/0x2860 [ 31.439102] __do_softirq+0x1b7/0x7d4 [ 31.439531] [ 31.439694] Last potentially related work creation: [ 31.440100] kasan_save_stack+0x22/0x50 [ 31.440487] __kasan_record_aux_stack+0x8e/0xa0 [ 31.440893] __call_rcu_common.constprop.0+0x6a/0xb90 [ 31.441349] remove_vma+0x139/0x170 [ 31.441661] do_vmi_align_munmap+0xd4a/0x11f0 [ 31.442043] do_vmi_munmap+0x1f1/0x2b0 [ 31.442384] __vm_munmap+0x138/0x3a0 [ 31.442712] __x64_sys_munmap+0x59/0x80 [ 31.443063] do_syscall_64+0x3f/0x90 [ 31.443442] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 31.443899] [ 31.444052] The buggy address belongs to the object at ffff8880145a6828 [ 31.444052] which belongs to the cache vm_area_struct of size 168 [ 31.445039] The buggy address is located 88 bytes inside of [ 31.445039] freed 168-byte region [ffff8880145a6828, ffff8880145a68d0) [ 31.445993] [ 31.446147] The buggy address belongs to the physical page: [ 31.446604] page:000000002fa68133 refcount:1 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0x145a6 [ 31.447348] memcg:ffff888019f38201 [ 31.447706] anon flags: 0x100000000000200(slab|node=0|zone=1) [ 31.448176] page_type: 0xffffffff() [ 31.448474] raw: 0100000000000200 ffff88800879fc80 ffffea0000251e80 dead000000000005 [ 31.449107] raw: 0000000000000000 0000000000110011 00000001ffffffff ffff888019f38201 [ 31.449730] page dumped because: kasan: bad access detected [ 31.450173] [ 31.450318] Memory state around the buggy address: [ 31.450711] ffff8880145a6780: fb fb fb fb fb fb fb fb fb fb fb fb fb fc fc fc [ 31.451277] ffff8880145a6800: fc fc fc fc fc fa fb fb fb fb fb fb fb fb fb fb [ 31.451912] >ffff8880145a6880: fb fb fb fb fb fb fb fb fb fb fc fc fc fc fc fc [ 31.452474] ^ [ 31.452746] ffff8880145a6900: fc fc fa fb fb fb fb fb fb fb fb fb fb fb fb fb [ 31.453305] ffff8880145a6980: fb fb fb fb fb fb fb fc fc fc fc fc fc fc fc fa [ 31.453887] ================================================================== [ 31.454914] Disabling lock debugging due to kernel taint Debian GNU/Linux 11 syzkaller ttyS0 syzkaller login: [ 33.152169] BUG: Bad rss-counter state mm:000000007e9c3714 type:MM_FILEPAGES val:33 [ 33.152865] BUG: Bad rss-counter state mm:000000007e9c3714 type:MM_ANONPAGES val:22 [ 34.528122] BUG: Bad rss-counter state mm:00000000c5102bcd type:MM_FILEPAGES val:33 [ 34.528816] BUG: Bad rss-counter state mm:00000000c5102bcd type:MM_ANONPAGES val:22 Warning: Permanently added '[localhost]:2785' (ECDSA) to the list of known hosts. 2023/06/20 08:08:53 fuzzer started 2023/06/20 08:08:54 dialing manager at localhost:44161 2023/06/20 08:08:54 checking machine... 2023/06/20 08:08:54 checking revisions... [ 35.545919] kmemleak: Automatic memory scanning thread ended 2023/06/20 08:08:54 testing simple program... [ 35.605326] cgroup: Unknown subsys name 'net' [ 35.688553] cgroup: Unknown subsys name 'rlimit' executing program executing program executing program VM DIAGNOSIS: 08:08:52 Registers: info registers vcpu 0 RAX=0000000080010001 RBX=0000000000000001 RCX=0000000000000000 RDX=ffffffff8542a6c0 RSI=ffffffff813c0076 RDI=0000000000000001 RBP=ffff88806ce2ba08 RSP=ffff88806ce09e40 R8 =0000000000000001 R9 =0000000000000000 R10=0000000000000001 R11=0000001726e89994 R12=ffff88806ce2c250 R13=ffff88806ce2b940 R14=ffff88806ce2b9c0 R15=dffffc0000000000 RIP=ffffffff814c0800 RFL=00000046 [---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 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=00007ffe19edab08 CR3=0000000005482000 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=00007f9d588cf510000055d3756e5790 XMM02=6f6974707972636e6561737268746977 XMM03=00000000000000000000000000777074 XMM04=40404040404040404040404040404040 XMM05=5a5a5a5a5a5a5a5a5a5a5a5a5a5a5a5a XMM06=20202020202020202020202020202020 XMM07=ffffffffffff00ffffff00ffffff00ff XMM08=00002000000000202020002020200000 XMM09=ffffffffffff00ffffff00ffffff00ff XMM10=00002000000000202020002020200000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000 info registers vcpu 1 RAX=0000000000000000 RBX=0000000000000001 RCX=ffffffff864b9d56 RDX=0000000000000002 RSI=1ffff11002f5cedf RDI=ffff888017ae7708 RBP=ffff888017ae76e2 RSP=ffff888017ae7630 R8 =ffffffff864b9d5a R9 =ffff888017ae76e0 R10=0000000000038001 R11=00000000000b6996 R12=ffff888017ae7700 R13=ffff888017ae76e8 R14=ffff888017ae7f58 R15=ffff888017ae76a0 RIP=ffffffff811318be 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 00007fee066f6900 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=00007f5b5cac8618 CR3=000000000eee0000 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=ffffffffffff00000000000000000000 XMM02=ffffffffffff00000000000000000000 XMM03=00000000000000000000000000000000 XMM04=00000000000000000000000000000000 XMM05=00000000000000000000000000000000 XMM06=00000000000000000000000000000000 XMM07=00000000000000000000000000000000 XMM08=00000000000073707574726174732064 XMM09=00000000000000000000000000000000 XMM10=00000000000000000000000000000000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000