[ 23.689768] BUG: Bad rss-counter state mm:0000000083bfd6a8 type:MM_FILEPAGES val:33 [ 23.690678] BUG: Bad rss-counter state mm:0000000083bfd6a8 type:MM_ANONPAGES val:22 [ 23.794815] ================================================================== [ 23.796137] BUG: KASAN: slab-use-after-free in vma_interval_tree_remove+0xc75/0xec0 [ 23.797667] Read of size 8 at addr ffff88800e02d6b0 by task sshd/218 [ 23.798425] [ 23.798568] CPU: 1 PID: 218 Comm: sshd Not tainted 6.4.0-rc7-next-20230620 #1 [ 23.799137] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS 1.12.0-1 04/01/2014 [ 23.799791] Call Trace: [ 23.800004] [ 23.800188] dump_stack_lvl+0x91/0xf0 [ 23.800513] print_report+0xcc/0x620 [ 23.800828] ? __virt_addr_valid+0x102/0x340 [ 23.801197] ? vma_interval_tree_remove+0xc75/0xec0 [ 23.801615] ? vma_interval_tree_remove+0xc75/0xec0 [ 23.802019] kasan_report+0xbe/0xf0 [ 23.802331] ? vma_interval_tree_remove+0xc75/0xec0 [ 23.802744] vma_interval_tree_remove+0xc75/0xec0 [ 23.803140] vma_prepare+0xc54/0x11a0 [ 23.803457] __split_vma+0x5af/0x950 [ 23.803769] ? __pfx___split_vma+0x10/0x10 [ 23.804118] ? find_held_lock+0x2c/0x110 [ 23.804460] do_vmi_align_munmap+0x2ba/0x11f0 [ 23.804837] ? lock_is_held_type+0x9f/0x120 [ 23.805195] ? __pfx_do_vmi_align_munmap+0x10/0x10 [ 23.805607] ? mtree_range_walk+0x632/0x900 [ 23.805960] ? mas_walk+0x5c7/0x7c0 [ 23.806262] do_vmi_munmap+0x1f1/0x2b0 [ 23.806587] mmap_region+0x1f9/0x2660 [ 23.806896] ? vm_mmap_pgoff+0x15c/0x3a0 [ 23.807225] ? __pfx_arch_get_unmapped_area_topdown+0x10/0x10 [ 23.807695] ? __pfx_lock_acquire+0x10/0x10 [ 23.808039] ? __pfx_mmap_region+0x10/0x10 [ 23.808384] ? security_mmap_addr+0x7d/0xa0 [ 23.808737] ? get_unmapped_area+0x1f5/0x3f0 [ 23.809101] do_mmap+0x854/0xf00 [ 23.809400] vm_mmap_pgoff+0x1a6/0x3a0 [ 23.809730] ? __pfx_vm_mmap_pgoff+0x10/0x10 [ 23.810099] ksys_mmap_pgoff+0x3af/0x500 [ 23.810435] do_syscall_64+0x3f/0x90 [ 23.810744] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 23.811173] RIP: 0033:0x7feffbb12d82 [ 23.811484] 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 [ 23.812881] RSP: 002b:00007ffd601a7468 EFLAGS: 00000206 ORIG_RAX: 0000000000000009 [ 23.813492] RAX: ffffffffffffffda RBX: 0000000000000812 RCX: 00007feffbb12d82 [ 23.814055] RDX: 0000000000000005 RSI: 0000000000001000 RDI: 00007feffaf4c000 [ 23.814624] RBP: 00007feffaf4c000 R08: 0000000000000009 R09: 0000000000001000 [ 23.815182] R10: 0000000000000812 R11: 0000000000000206 R12: 00005588e54d1d90 [ 23.815750] R13: 00007ffd601a7480 R14: 00007ffd601a74b0 R15: 00007ffd601a7810 [ 23.816322] [ 23.816515] [ 23.816654] Allocated by task 211: [ 23.816936] kasan_save_stack+0x22/0x50 [ 23.817269] kasan_set_track+0x25/0x30 [ 23.817598] __kasan_slab_alloc+0x59/0x70 [ 23.817940] kmem_cache_alloc+0x16b/0x370 [ 23.818276] vm_area_dup+0x20/0x160 [ 23.818576] __split_vma+0x170/0x950 [ 23.818878] split_vma+0xc6/0x110 [ 23.819162] mprotect_fixup+0x8d2/0xb30 [ 23.819490] do_mprotect_pkey+0x87e/0xd40 [ 23.819832] __x64_sys_mprotect+0x78/0xc0 [ 23.820171] do_syscall_64+0x3f/0x90 [ 23.820473] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 23.820797] [ 23.820906] Freed by task 211: [ 23.821104] kasan_save_stack+0x22/0x50 [ 23.821358] kasan_set_track+0x25/0x30 [ 23.821620] kasan_save_free_info+0x2b/0x50 [ 23.821887] __kasan_slab_free+0x10a/0x190 [ 23.822153] kmem_cache_free+0x10d/0x4d0 [ 23.822409] rcu_core+0x8c8/0x2860 [ 23.822632] __do_softirq+0x1b7/0x7d4 [ 23.822872] [ 23.822981] Last potentially related work creation: [ 23.823277] kasan_save_stack+0x22/0x50 [ 23.823529] __kasan_record_aux_stack+0x8e/0xa0 [ 23.823816] __call_rcu_common.constprop.0+0x6a/0xb90 [ 23.824138] remove_vma+0x139/0x170 [ 23.824364] do_vmi_align_munmap+0xd4a/0x11f0 [ 23.824686] do_vmi_munmap+0x1f1/0x2b0 [ 23.824930] __vm_munmap+0x138/0x3a0 [ 23.825163] __x64_sys_munmap+0x59/0x80 [ 23.825413] do_syscall_64+0x3f/0x90 [ 23.825660] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 23.825981] [ 23.826091] Second to last potentially related work creation: [ 23.826439] kasan_save_stack+0x22/0x50 [ 23.826692] __kasan_record_aux_stack+0x8e/0xa0 [ 23.826979] __call_rcu_common.constprop.0+0x6a/0xb90 [ 23.827305] remove_vma+0x139/0x170 [ 23.827531] do_vmi_align_munmap+0xd4a/0x11f0 [ 23.827810] do_vmi_munmap+0x1f1/0x2b0 [ 23.828054] mmap_region+0x1f9/0x2660 [ 23.828294] do_mmap+0x854/0xf00 [ 23.828512] vm_mmap_pgoff+0x1a6/0x3a0 [ 23.828757] ksys_mmap_pgoff+0x3af/0x500 [ 23.829008] do_syscall_64+0x3f/0x90 [ 23.829246] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 23.829574] [ 23.829684] The buggy address belongs to the object at ffff88800e02d658 [ 23.829684] which belongs to the cache vm_area_struct of size 168 [ 23.830417] The buggy address is located 88 bytes inside of [ 23.830417] freed 168-byte region [ffff88800e02d658, ffff88800e02d700) [ 23.831123] [ 23.831234] The buggy address belongs to the physical page: [ 23.831569] page:0000000089f763de refcount:1 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0xe02d [ 23.832116] memcg:ffff88800ec79201 [ 23.832336] flags: 0x100000000000200(slab|node=0|zone=1) [ 23.832667] page_type: 0xffffffff() [ 23.832899] raw: 0100000000000200 ffff8880087a0c80 dead000000000100 dead000000000122 [ 23.833369] raw: 0000000000000000 0000000000110011 00000001ffffffff ffff88800ec79201 [ 23.833834] page dumped because: kasan: bad access detected [ 23.834167] [ 23.834277] Memory state around the buggy address: [ 23.834573] ffff88800e02d580: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 [ 23.835007] ffff88800e02d600: 00 00 00 fc fc fc fc fc fc fc fc fa fb fb fb fb [ 23.835444] >ffff88800e02d680: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb [ 23.835872] ^ [ 23.836167] ffff88800e02d700: fc fc fc fc fc fc fc fc fa fb fb fb fb fb fb fb [ 23.836600] ffff88800e02d780: fb fb fb fb fb fb fb fb fb fb fb fb fb fc fc fc [ 23.837026] ================================================================== [ 23.837498] Disabling lock debugging due to kernel taint Debian GNU/Linux 11 syzkaller ttyS0 syzkaller login: [ 25.729248] BUG: Bad rss-counter state mm:000000007e335057 type:MM_FILEPAGES val:33 [ 25.730905] BUG: Bad rss-counter state mm:000000007e335057 type:MM_ANONPAGES val:22 [ 26.182400] BUG: Bad rss-counter state mm:000000002e65133f type:MM_FILEPAGES val:33 [ 26.183376] BUG: Bad rss-counter state mm:000000002e65133f type:MM_ANONPAGES val:22 Warning: Permanently added '[localhost]:32758' (ECDSA) to the list of known hosts. 2023/06/20 19:10:49 fuzzer started 2023/06/20 19:10:49 dialing manager at localhost:36067 2023/06/20 19:10:49 checking machine... 2023/06/20 19:10:49 checking revisions... [ 26.960642] kmemleak: Automatic memory scanning thread ended 2023/06/20 19:10:49 testing simple program... [ 27.024042] cgroup: Unknown subsys name 'net' [ 27.082736] cgroup: Unknown subsys name 'rlimit' executing program executing program executing program VM DIAGNOSIS: 19:10:49 Registers: info registers vcpu 0 RAX=dffffc0000000000 RBX=0000000000000002 RCX=ffffffff84537da6 RDX=000000000003537e RSI=000000000003537d RDI=ffffffff865be7e8 RBP=ffff88806ce09af0 RSP=ffff88806ce09a28 R8 =0000000000000000 R9 =ffff88806ce09ad8 R10=0000000000038001 R11=00000000000b5d59 R12=ffff88806ce09af8 R13=ffff88806ce09ae0 R14=ffff88806ce09ad9 R15=ffff88806ce09a98 RIP=ffffffff811307e3 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 =0018 0000000000000000 ffffffff 00c09300 DPL=0 DS [-WA] DS =0000 0000000000000000 00000000 00000000 FS =0000 00007f9f7cd01900 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=00007f9f7d2b6650 CR3=000000000d078000 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=0a0a0a0a0a0a0a0a0a0a0a0a0a0a0a0a XMM01=00000000000000000000000000000000 XMM02=ffffffffffffff00ffff000000000000 XMM03=7720656c62697461706d6f63206d6874 XMM04=40404040404040404040404040404040 XMM05=5a5a5a5a5a5a5a5a5a5a5a5a5a5a5a5a XMM06=20202020202020202020202020202020 XMM07=00ffffffffffffffffffffffffffffff XMM08=00000000000000810000363532616873 XMM09=00000000000000000000000000000000 XMM10=00002020202020200020202020202020 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000 info registers vcpu 1 RAX=dffffc0000000000 RBX=0000000000000000 RCX=ffffffff8137abd3 RDX=0000000000000000 RSI=0000000000000008 RDI=ffffffff85d3d350 RBP=ffff88806cf35000 RSP=ffff888008e07ca8 R8 =0000000000000000 R9 =fffffbfff0ba7a6a R10=ffffffff85d3d357 R11=0000000000000001 R12=ffff88806cf39500 R13=ffff88806cf3a2c0 R14=ffff888008d951c0 R15=0000000000000000 RIP=ffffffff8137b6c2 RFL=00000016 [----AP-] 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 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=00007ffeeeab68a8 CR3=000000001597e000 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=2039343a30313a3931203032206e754a XMM01=657463656e6e6f63736944203a5d3732 XMM02=302e303120746f6f722072657375206d XMM03=203a5d3732325b646873732072656c6c XMM04=69662068637573206f4e203a656c6163 XMM05=3a656c696620766e65206e65706f206f XMM06=65733a6468737328766e655f6d617020 XMM07=6b7a79732038343a30313a3931203032 XMM08=3d656e696c646d632022656369767265 XMM09=00000000000000000000000000000000 XMM10=00000000000000000000000000000000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000