[ 30.553957] BUG: Bad rss-counter state mm:00000000919cb2b2 type:MM_FILEPAGES val:33 [ 30.554972] BUG: Bad rss-counter state mm:00000000919cb2b2 type:MM_ANONPAGES val:22 [ 30.745513] ================================================================== [ 30.746568] BUG: KASAN: slab-use-after-free in vma_interval_tree_remove+0xc75/0xec0 [ 30.747725] Read of size 8 at addr ffff8880095a0968 by task sshd/222 [ 30.748604] [ 30.748824] CPU: 0 PID: 222 Comm: sshd Not tainted 6.4.0-rc7-next-20230620 #1 [ 30.749698] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS 1.12.0-1 04/01/2014 [ 30.750704] Call Trace: [ 30.751031] [ 30.751319] dump_stack_lvl+0x91/0xf0 [ 30.751814] print_report+0xcc/0x620 [ 30.752299] ? __virt_addr_valid+0x102/0x340 [ 30.752856] ? vma_interval_tree_remove+0xc75/0xec0 [ 30.753483] ? vma_interval_tree_remove+0xc75/0xec0 [ 30.754097] kasan_report+0xbe/0xf0 [ 30.754580] ? vma_interval_tree_remove+0xc75/0xec0 [ 30.755223] vma_interval_tree_remove+0xc75/0xec0 [ 30.755819] vma_prepare+0xc54/0x11a0 [ 30.756300] __split_vma+0x5af/0x950 [ 30.756774] ? __pfx___split_vma+0x10/0x10 [ 30.757302] ? find_held_lock+0x2c/0x110 [ 30.757820] do_vmi_align_munmap+0x2ba/0x11f0 [ 30.758384] ? lock_is_held_type+0x9f/0x120 [ 30.758938] ? __pfx_do_vmi_align_munmap+0x10/0x10 [ 30.759544] ? mtree_range_walk+0x632/0x900 [ 30.760101] ? mas_walk+0x5c7/0x7c0 [ 30.760576] do_vmi_munmap+0x1f1/0x2b0 [ 30.761073] mmap_region+0x1f9/0x2660 [ 30.761550] ? vm_mmap_pgoff+0x15c/0x3a0 [ 30.762060] ? __pfx_arch_get_unmapped_area_topdown+0x10/0x10 [ 30.762779] ? __pfx_lock_acquire+0x10/0x10 [ 30.763314] ? __pfx_mmap_region+0x10/0x10 [ 30.763854] ? security_mmap_addr+0x7d/0xa0 [ 30.764383] ? get_unmapped_area+0x1f5/0x3f0 [ 30.764943] do_mmap+0x854/0xf00 [ 30.765382] vm_mmap_pgoff+0x1a6/0x3a0 [ 30.765881] ? __pfx_vm_mmap_pgoff+0x10/0x10 [ 30.766445] ksys_mmap_pgoff+0x3af/0x500 [ 30.766967] do_syscall_64+0x3f/0x90 [ 30.767446] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 30.768097] RIP: 0033:0x7fab58aacd82 [ 30.768548] 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 [ 30.770674] RSP: 002b:00007ffccb81b198 EFLAGS: 00000206 ORIG_RAX: 0000000000000009 [ 30.771579] RAX: ffffffffffffffda RBX: 0000000000000812 RCX: 00007fab58aacd82 [ 30.772426] RDX: 0000000000000005 RSI: 0000000000001000 RDI: 00007fab57ee6000 [ 30.773265] RBP: 00007fab57ee6000 R08: 0000000000000009 R09: 0000000000001000 [ 30.774160] R10: 0000000000000812 R11: 0000000000000206 R12: 000055c5ac8c0d90 [ 30.775043] R13: 00007ffccb81b1b0 R14: 00007ffccb81b1e0 R15: 00007ffccb81b540 [ 30.775931] [ 30.776221] [ 30.776446] Allocated by task 213: [ 30.776888] kasan_save_stack+0x22/0x50 [ 30.777396] kasan_set_track+0x25/0x30 [ 30.777900] __kasan_slab_alloc+0x59/0x70 [ 30.778423] kmem_cache_alloc+0x16b/0x370 [ 30.778952] vm_area_dup+0x20/0x160 [ 30.779409] __split_vma+0x170/0x950 [ 30.779877] split_vma+0xc6/0x110 [ 30.780329] mprotect_fixup+0x8d2/0xb30 [ 30.780833] do_mprotect_pkey+0x87e/0xd40 [ 30.781351] __x64_sys_mprotect+0x78/0xc0 [ 30.781896] do_syscall_64+0x3f/0x90 [ 30.782370] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 30.783036] [ 30.783250] Freed by task 213: [ 30.783641] kasan_save_stack+0x22/0x50 [ 30.784146] kasan_set_track+0x25/0x30 [ 30.784645] kasan_save_free_info+0x2b/0x50 [ 30.785173] __kasan_slab_free+0x10a/0x190 [ 30.785713] kmem_cache_free+0x10d/0x4d0 [ 30.786229] rcu_core+0x8c8/0x2860 [ 30.786682] __do_softirq+0x1b7/0x7d4 [ 30.787159] [ 30.787376] Last potentially related work creation: [ 30.787962] kasan_save_stack+0x22/0x50 [ 30.788465] __kasan_record_aux_stack+0x8e/0xa0 [ 30.789042] __call_rcu_common.constprop.0+0x6a/0xb90 [ 30.789690] remove_vma+0x139/0x170 [ 30.790140] do_vmi_align_munmap+0xd4a/0x11f0 [ 30.790715] do_vmi_munmap+0x1f1/0x2b0 [ 30.791209] __vm_munmap+0x138/0x3a0 [ 30.791680] __x64_sys_munmap+0x59/0x80 [ 30.792176] do_syscall_64+0x3f/0x90 [ 30.792653] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 30.793302] [ 30.793516] Second to last potentially related work creation: [ 30.794209] kasan_save_stack+0x22/0x50 [ 30.794729] __kasan_record_aux_stack+0x8e/0xa0 [ 30.795311] __call_rcu_common.constprop.0+0x6a/0xb90 [ 30.795957] remove_vma+0x139/0x170 [ 30.796412] do_vmi_align_munmap+0xd4a/0x11f0 [ 30.796968] do_vmi_munmap+0x1f1/0x2b0 [ 30.797463] mmap_region+0x1f9/0x2660 [ 30.797950] do_mmap+0x854/0xf00 [ 30.798382] vm_mmap_pgoff+0x1a6/0x3a0 [ 30.798891] ksys_mmap_pgoff+0x3af/0x500 [ 30.799391] do_syscall_64+0x3f/0x90 [ 30.799876] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 30.800519] [ 30.800734] The buggy address belongs to the object at ffff8880095a0910 [ 30.800734] which belongs to the cache vm_area_struct of size 168 [ 30.802223] The buggy address is located 88 bytes inside of [ 30.802223] freed 168-byte region [ffff8880095a0910, ffff8880095a09b8) [ 30.803642] [ 30.803861] The buggy address belongs to the physical page: [ 30.804522] page:0000000059593fb2 refcount:1 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0x95a0 [ 30.805611] memcg:ffff88800ec70601 [ 30.806038] flags: 0x100000000000200(slab|node=0|zone=1) [ 30.806683] page_type: 0xffffffff() [ 30.807148] raw: 0100000000000200 ffff8880087a0c80 ffffea0000336900 dead000000000002 [ 30.808086] raw: 0000000000000000 0000000000110011 00000001ffffffff ffff88800ec70601 [ 30.808994] page dumped because: kasan: bad access detected [ 30.809652] [ 30.809873] Memory state around the buggy address: [ 30.810460] ffff8880095a0800: fc fc fc fc fc 00 00 00 00 00 00 00 00 00 00 00 [ 30.811339] ffff8880095a0880: 00 00 00 00 00 00 00 00 00 00 fc fc fc fc fc fc [ 30.812198] >ffff8880095a0900: fc fc fa fb fb fb fb fb fb fb fb fb fb fb fb fb [ 30.813047] ^ [ 30.813827] ffff8880095a0980: fb fb fb fb fb fb fb fc fc fc fc fc fc fc fc 00 [ 30.814705] ffff8880095a0a00: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 [ 30.815567] ================================================================== [ 30.816890] Disabling lock debugging due to kernel taint Debian GNU/Linux 11 syzkaller ttyS0 syzkaller login: [ 32.604919] BUG: Bad rss-counter state mm:00000000ef6cfdbb type:MM_FILEPAGES val:33 [ 32.605651] BUG: Bad rss-counter state mm:00000000ef6cfdbb type:MM_ANONPAGES val:22 [ 32.983599] BUG: Bad rss-counter state mm:000000001042ae58 type:MM_FILEPAGES val:33 [ 32.984233] BUG: Bad rss-counter state mm:000000001042ae58 type:MM_ANONPAGES val:22 Warning: Permanently added '[localhost]:7198' (ECDSA) to the list of known hosts. 2023/06/21 04:02:07 fuzzer started 2023/06/21 04:02:07 dialing manager at localhost:36067 2023/06/21 04:02:07 checking machine... 2023/06/21 04:02:07 checking revisions... [ 33.610254] kmemleak: Automatic memory scanning thread ended 2023/06/21 04:02:07 testing simple program... [ 33.660042] cgroup: Unknown subsys name 'net' [ 33.704624] cgroup: Unknown subsys name 'rlimit' executing program executing program executing program VM DIAGNOSIS: 04:02:06 Registers: info registers vcpu 0 RAX=0000000000000000 RBX=ffff888016408000 RCX=0000000000000000 RDX=ffff88800e87b680 RSI=ffffffff83867cf1 RDI=0000000000000005 RBP=ffff8880192c1cc8 RSP=ffff8880164279c0 R8 =0000000000000005 R9 =0000000000000000 R10=0000000000000000 R11=000009e1000009e1 R12=ffff888016427e60 R13=ffff8880192c1cc0 R14=ffff888016427a88 R15=00000000000000a4 RIP=ffffffff83867cf1 RFL=00000293 [--S-A-C] 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 00007f023252c900 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=00007fffb4861000 CR3=0000000019ffa000 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=74696d7265705f6d61703d73726f746e XMM02=000000000000000000000000000000ff XMM03=5320444f4854454d5f54505952434e45 XMM04=40404040404040404040404040404040 XMM05=5a5a5a5a5a5a5a5a5a5a5a5a5a5a5a5a XMM06=20202020202020202020202020202020 XMM07=00000000000000000000000000000000 XMM08=61662029286e65706f5f746964756100 XMM09=00000000000000000000000000000000 XMM10=00000000000000000000000000000000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000 info registers vcpu 1 RAX=ffff88806cf35000 RBX=0000000000000001 RCX=ffffffff8451250e RDX=ffffed100d9e6a01 RSI=0000000000000004 RDI=ffffffff81288ac5 RBP=dffffc0000000000 RSP=ffff888008e07e70 R8 =0000000000000000 R9 =ffffed100d9e6a00 R10=ffff88806cf35003 R11=0000000000000001 R12=ffffffff85d3d350 R13=1ffff110011c0fd3 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 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=00007f52475707e0 CR3=000000000b324000 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=2036303a32303a3430203132206e754a XMM01=73732878696e755f6d6170203a5d3932 XMM02=65736f6c63206e6f6973736573203a29 XMM03=755f6d6170203a5d3932325b64687373 XMM04=69662068637573206f4e203a656c6163 XMM05=3a656c696620766e65206e65706f206f XMM06=65733a6468737328766e655f6d617020 XMM07=6b7a79732036303a32303a3430203132 XMM08=3d656e696c646d632022656369767265 XMM09=00000000000000000000000000000000 XMM10=00000000000000000000000000000000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000