[ 23.686661] BUG: Bad rss-counter state mm:0000000000bd0717 type:MM_FILEPAGES val:33 [ 23.687627] BUG: Bad rss-counter state mm:0000000000bd0717 type:MM_ANONPAGES val:22 [ 23.849427] ================================================================== [ 23.850348] BUG: KASAN: slab-use-after-free in vma_interval_tree_remove+0xc75/0xec0 [ 23.851285] Read of size 8 at addr ffff88800fc35798 by task sshd/220 [ 23.852056] [ 23.852277] CPU: 0 PID: 220 Comm: sshd Not tainted 6.4.0-rc7-next-20230620 #1 [ 23.853309] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS 1.12.0-1 04/01/2014 [ 23.854293] Call Trace: [ 23.854617] [ 23.854903] dump_stack_lvl+0x91/0xf0 [ 23.855396] print_report+0xcc/0x620 [ 23.855888] ? __virt_addr_valid+0x102/0x340 [ 23.856463] ? vma_interval_tree_remove+0xc75/0xec0 [ 23.857079] ? vma_interval_tree_remove+0xc75/0xec0 [ 23.857699] kasan_report+0xbe/0xf0 [ 23.858186] ? vma_interval_tree_remove+0xc75/0xec0 [ 23.858818] vma_interval_tree_remove+0xc75/0xec0 [ 23.859421] vma_prepare+0xc54/0x11a0 [ 23.859902] __split_vma+0x5af/0x950 [ 23.860373] ? __pfx___split_vma+0x10/0x10 [ 23.860917] ? find_held_lock+0x2c/0x110 [ 23.861445] do_vmi_align_munmap+0x2ba/0x11f0 [ 23.862009] ? lock_is_held_type+0x9f/0x120 [ 23.862552] ? __pfx_do_vmi_align_munmap+0x10/0x10 [ 23.863165] ? mtree_range_walk+0x632/0x900 [ 23.863721] ? mas_walk+0x5c7/0x7c0 [ 23.864201] do_vmi_munmap+0x1f1/0x2b0 [ 23.864712] mmap_region+0x1f9/0x2660 [ 23.865204] ? vm_mmap_pgoff+0x15c/0x3a0 [ 23.865717] ? __pfx_arch_get_unmapped_area_topdown+0x10/0x10 [ 23.866440] ? __pfx_lock_acquire+0x10/0x10 [ 23.866983] ? __pfx_mmap_region+0x10/0x10 [ 23.867515] ? security_mmap_addr+0x7d/0xa0 [ 23.868049] ? get_unmapped_area+0x1f5/0x3f0 [ 23.868620] do_mmap+0x854/0xf00 [ 23.869065] vm_mmap_pgoff+0x1a6/0x3a0 [ 23.869564] ? __pfx_vm_mmap_pgoff+0x10/0x10 [ 23.870133] ksys_mmap_pgoff+0x3af/0x500 [ 23.870648] do_syscall_64+0x3f/0x90 [ 23.871133] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 23.871788] RIP: 0033:0x7f661df93d82 [ 23.872249] 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 [ 23.874424] RSP: 002b:00007fffcc6f25d8 EFLAGS: 00000206 ORIG_RAX: 0000000000000009 [ 23.875330] RAX: ffffffffffffffda RBX: 0000000000000812 RCX: 00007f661df93d82 [ 23.876188] RDX: 0000000000000005 RSI: 0000000000001000 RDI: 00007f661d3cd000 [ 23.877049] RBP: 00007f661d3cd000 R08: 0000000000000009 R09: 0000000000001000 [ 23.877911] R10: 0000000000000812 R11: 0000000000000206 R12: 00005568050e6ec0 [ 23.878763] R13: 00007fffcc6f25f0 R14: 00007fffcc6f2620 R15: 00007fffcc6f2980 [ 23.879632] [ 23.879927] [ 23.880144] Allocated by task 213: [ 23.880598] kasan_save_stack+0x22/0x50 [ 23.881109] kasan_set_track+0x25/0x30 [ 23.881610] __kasan_slab_alloc+0x59/0x70 [ 23.882143] kmem_cache_alloc+0x16b/0x370 [ 23.882668] vm_area_dup+0x20/0x160 [ 23.883143] __split_vma+0x170/0x950 [ 23.883615] split_vma+0xc6/0x110 [ 23.884065] mprotect_fixup+0x8d2/0xb30 [ 23.884576] do_mprotect_pkey+0x87e/0xd40 [ 23.885100] __x64_sys_mprotect+0x78/0xc0 [ 23.885625] do_syscall_64+0x3f/0x90 [ 23.886110] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 23.886764] [ 23.886978] Freed by task 213: [ 23.887380] kasan_save_stack+0x22/0x50 [ 23.887887] kasan_set_track+0x25/0x30 [ 23.888385] kasan_save_free_info+0x2b/0x50 [ 23.888943] __kasan_slab_free+0x10a/0x190 [ 23.889482] kmem_cache_free+0x10d/0x4d0 [ 23.889989] rcu_core+0x8c8/0x2860 [ 23.890440] __do_softirq+0x1b7/0x7d4 [ 23.890923] [ 23.891142] Last potentially related work creation: [ 23.891727] kasan_save_stack+0x22/0x50 [ 23.892233] __kasan_record_aux_stack+0x8e/0xa0 [ 23.892823] __call_rcu_common.constprop.0+0x6a/0xb90 [ 23.893469] remove_vma+0x139/0x170 [ 23.893928] do_vmi_align_munmap+0xd4a/0x11f0 [ 23.894493] do_vmi_munmap+0x1f1/0x2b0 [ 23.894982] __vm_munmap+0x138/0x3a0 [ 23.895452] __x64_sys_munmap+0x59/0x80 [ 23.895958] do_syscall_64+0x3f/0x90 [ 23.896445] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 23.897101] [ 23.897319] The buggy address belongs to the object at ffff88800fc35740 [ 23.897319] which belongs to the cache vm_area_struct of size 168 [ 23.898805] The buggy address is located 88 bytes inside of [ 23.898805] freed 168-byte region [ffff88800fc35740, ffff88800fc357e8) [ 23.900227] [ 23.900459] The buggy address belongs to the physical page: [ 23.901120] page:0000000057bb5b91 refcount:1 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0xfc35 [ 23.902201] memcg:ffff88800dee2101 [ 23.902628] anon flags: 0x100000000000200(slab|node=0|zone=1) [ 23.903297] page_type: 0xffffffff() [ 23.903726] raw: 0100000000000200 ffff8880087a0c80 ffffea00003c4900 dead000000000005 [ 23.904597] raw: 0000000000000000 0000000000110011 00000001ffffffff ffff88800dee2101 [ 23.905455] page dumped because: kasan: bad access detected [ 23.906084] [ 23.906289] Memory state around the buggy address: [ 23.906844] ffff88800fc35680: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 [ 23.907646] ffff88800fc35700: fc fc fc fc fc fc fc fc fa fb fb fb fb fb fb fb [ 23.908461] >ffff88800fc35780: fb fb fb fb fb fb fb fb fb fb fb fb fb fc fc fc [ 23.909264] ^ [ 23.909733] ffff88800fc35800: fc fc fc fc fc fa fb fb fb fb fb fb fb fb fb fb [ 23.910536] ffff88800fc35880: fb fb fb fb fb fb fb fb fb fb fc fc fc fc fc fc [ 23.911334] ================================================================== [ 23.912361] Disabling lock debugging due to kernel taint Debian GNU/Linux 11 syzkaller ttyS0 syzkaller login: [ 26.100881] BUG: Bad rss-counter state mm:00000000286d1789 type:MM_FILEPAGES val:33 [ 26.102083] BUG: Bad rss-counter state mm:00000000286d1789 type:MM_ANONPAGES val:22 [ 26.608425] BUG: Bad rss-counter state mm:00000000f6664237 type:MM_FILEPAGES val:33 [ 26.609677] BUG: Bad rss-counter state mm:00000000f6664237 type:MM_ANONPAGES val:22 Warning: Permanently added '[localhost]:62112' (ECDSA) to the list of known hosts. 2023/06/20 15:39:35 fuzzer started 2023/06/20 15:39:35 dialing manager at localhost:36067 2023/06/20 15:39:35 checking machine... 2023/06/20 15:39:35 checking revisions... [ 27.350666] kmemleak: Automatic memory scanning thread ended 2023/06/20 15:39:35 testing simple program... [ 27.403425] cgroup: Unknown subsys name 'net' [ 27.503817] cgroup: Unknown subsys name 'rlimit' executing program executing program executing program VM DIAGNOSIS: 15:39:35 Registers: info registers vcpu 0 RAX=ffffed100188cf8b RBX=0000000000000013 RCX=0000000000000000 RDX=ffff88800f1e51c0 RSI=ffffffff816ecdf6 RDI=ffffffff85d3d350 RBP=ffff88800c7408e8 RSP=ffff88800c467c18 R8 =0000000000000000 R9 =fffffbfff0ba7a6a R10=ffffffff85d3d357 R11=0000000000000001 R12=0000000000000000 R13=0000000000000cc0 R14=0000000000000cc0 R15=0000000000000cc0 RIP=ffffffff816ece0b RFL=00000286 [--S--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 00007fd59d961900 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=00007fd59df16650 CR3=000000000960a000 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=000000000000000000000000000000ff XMM02=000000000000000000000000000000ff XMM03=5320444f4854454d5f54505952434e45 XMM04=40404040404040404040404040404040 XMM05=5a5a5a5a5a5a5a5a5a5a5a5a5a5a5a5a XMM06=20202020202020202020202020202020 XMM07=00000000000000000000000000000000 XMM08=ffbc64ffffbc44ffffbc34ffffbc9f00 XMM09=00000000000000000000000000000000 XMM10=00000000000000000000000000000000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000 info registers vcpu 1 RAX=ffff88806cf09e58 RBX=0000000000000002 RCX=0000000000000002 RDX=ffff88806cf09e01 RSI=ffff88806cf09e10 RDI=ffff88806cf09e10 RBP=ffff88806cf09af0 RSP=ffff88806cf09a20 R8 =0000000000000001 R9 =ffff88806cf09ad8 R10=0000000000038001 R11=0000000000020db7 R12=ffff88806cf09af8 R13=ffff88806cf09ae0 R14=ffff88806cf09e10 R15=ffff88806cf09a98 RIP=ffffffff8112fbf3 RFL=00000202 [-------] 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=00007ffe14b0b828 CR3=0000000005482000 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=00007fb8456b5510000055e8cb3f6790 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