[ 26.161650] BUG: Bad rss-counter state mm:0000000069bc7090 type:MM_FILEPAGES val:33 [ 26.162988] BUG: Bad rss-counter state mm:0000000069bc7090 type:MM_ANONPAGES val:22 [ 26.205950] ================================================================== [ 26.207076] BUG: KASAN: slab-use-after-free in vma_interval_tree_remove+0xc75/0xec0 [ 26.208357] Read of size 8 at addr ffff888017700880 by task sshd/219 [ 26.209231] [ 26.209445] CPU: 1 PID: 219 Comm: sshd Not tainted 6.4.0-rc7-next-20230619 #1 [ 26.210300] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS 1.12.0-1 04/01/2014 [ 26.211252] Call Trace: [ 26.211569] [ 26.211848] dump_stack_lvl+0x91/0xf0 [ 26.212330] print_report+0xcc/0x620 [ 26.212821] ? __virt_addr_valid+0x102/0x340 [ 26.213368] ? vma_interval_tree_remove+0xc75/0xec0 [ 26.213989] ? vma_interval_tree_remove+0xc75/0xec0 [ 26.214606] kasan_report+0xbe/0xf0 [ 26.215086] ? vma_interval_tree_remove+0xc75/0xec0 [ 26.215707] vma_interval_tree_remove+0xc75/0xec0 [ 26.216297] vma_prepare+0xc54/0x11a0 [ 26.216802] __split_vma+0x5af/0x950 [ 26.217269] ? __pfx___split_vma+0x10/0x10 [ 26.217793] ? find_held_lock+0x2c/0x110 [ 26.218310] do_vmi_align_munmap+0x2ba/0x11f0 [ 26.218868] ? lock_is_held_type+0x9f/0x120 [ 26.219398] ? __pfx_do_vmi_align_munmap+0x10/0x10 [ 26.219996] ? mtree_range_walk+0x632/0x900 [ 26.220549] ? mas_walk+0x5c7/0x7c0 [ 26.221024] do_vmi_munmap+0x1f1/0x2b0 [ 26.221516] mmap_region+0x1f9/0x2660 [ 26.221992] ? vm_mmap_pgoff+0x15c/0x3a0 [ 26.222503] ? __pfx_arch_get_unmapped_area_topdown+0x10/0x10 [ 26.223204] ? __pfx_lock_acquire+0x10/0x10 [ 26.223737] ? __pfx_mmap_region+0x10/0x10 [ 26.224260] ? security_mmap_addr+0x7d/0xa0 [ 26.224805] ? get_unmapped_area+0x1f5/0x3f0 [ 26.225342] do_mmap+0x854/0xf00 [ 26.225781] vm_mmap_pgoff+0x1a6/0x3a0 [ 26.226273] ? __pfx_vm_mmap_pgoff+0x10/0x10 [ 26.226828] ksys_mmap_pgoff+0x3af/0x500 [ 26.227331] do_syscall_64+0x3f/0x90 [ 26.227806] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 26.228446] RIP: 0033:0x7f84cc281d82 [ 26.228906] 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 [ 26.230988] RSP: 002b:00007ffda4dd2578 EFLAGS: 00000206 ORIG_RAX: 0000000000000009 [ 26.231870] RAX: ffffffffffffffda RBX: 0000000000000812 RCX: 00007f84cc281d82 [ 26.232716] RDX: 0000000000000005 RSI: 0000000000001000 RDI: 00007f84cb6bb000 [ 26.233554] RBP: 00007f84cb6bb000 R08: 0000000000000009 R09: 0000000000001000 [ 26.234389] R10: 0000000000000812 R11: 0000000000000206 R12: 000055cdaa356980 [ 26.235225] R13: 00007ffda4dd2590 R14: 00007ffda4dd25c0 R15: 00007ffda4dd2920 [ 26.236069] [ 26.236356] [ 26.236587] Allocated by task 212: [ 26.237019] kasan_save_stack+0x22/0x50 [ 26.237529] kasan_set_track+0x25/0x30 [ 26.238029] __kasan_slab_alloc+0x59/0x70 [ 26.238555] kmem_cache_alloc+0x16b/0x370 [ 26.239068] vm_area_dup+0x20/0x160 [ 26.239524] __split_vma+0x170/0x950 [ 26.239991] split_vma+0xc6/0x110 [ 26.240436] mprotect_fixup+0x8d2/0xb30 [ 26.240955] do_mprotect_pkey+0x87e/0xd40 [ 26.241487] __x64_sys_mprotect+0x78/0xc0 [ 26.242016] do_syscall_64+0x3f/0x90 [ 26.242492] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 26.243140] [ 26.243360] Freed by task 212: [ 26.243754] kasan_save_stack+0x22/0x50 [ 26.244261] kasan_set_track+0x25/0x30 [ 26.244777] kasan_save_free_info+0x2b/0x50 [ 26.245312] __kasan_slab_free+0x10a/0x190 [ 26.245848] kmem_cache_free+0x10d/0x4d0 [ 26.246365] rcu_core+0x8c8/0x2860 [ 26.246810] __do_softirq+0x1b7/0x7d4 [ 26.247296] [ 26.247517] Last potentially related work creation: [ 26.248108] kasan_save_stack+0x22/0x50 [ 26.248646] __kasan_record_aux_stack+0x8e/0xa0 [ 26.249283] __call_rcu_common.constprop.0+0x6a/0xb90 [ 26.249924] remove_vma+0x139/0x170 [ 26.250377] do_vmi_align_munmap+0xd4a/0x11f0 [ 26.250934] do_vmi_munmap+0x1f1/0x2b0 [ 26.251426] __vm_munmap+0x138/0x3a0 [ 26.251893] __x64_sys_munmap+0x59/0x80 [ 26.252391] do_syscall_64+0x3f/0x90 [ 26.252881] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 26.253520] [ 26.253735] Second to last potentially related work creation: [ 26.254412] kasan_save_stack+0x22/0x50 [ 26.254915] __kasan_record_aux_stack+0x8e/0xa0 [ 26.255487] __call_rcu_common.constprop.0+0x6a/0xb90 [ 26.256126] remove_vma+0x139/0x170 [ 26.256588] do_vmi_align_munmap+0xd4a/0x11f0 [ 26.257147] do_vmi_munmap+0x1f1/0x2b0 [ 26.257631] mmap_region+0x1f9/0x2660 [ 26.258107] do_mmap+0x854/0xf00 [ 26.258540] vm_mmap_pgoff+0x1a6/0x3a0 [ 26.259029] ksys_mmap_pgoff+0x3af/0x500 [ 26.259528] do_syscall_64+0x3f/0x90 [ 26.260002] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 26.260671] [ 26.260887] The buggy address belongs to the object at ffff888017700828 [ 26.260887] which belongs to the cache vm_area_struct of size 168 [ 26.262345] The buggy address is located 88 bytes inside of [ 26.262345] freed 168-byte region [ffff888017700828, ffff8880177008d0) [ 26.263740] [ 26.263959] The buggy address belongs to the physical page: [ 26.264626] page:0000000002290dd3 refcount:1 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0x17700 [ 26.265716] memcg:ffff8880168aee01 [ 26.266144] flags: 0x100000000000200(slab|node=0|zone=1) [ 26.266787] page_type: 0xffffffff() [ 26.267240] raw: 0100000000000200 ffff88800879fc80 ffffea00005d5440 0000000000000008 [ 26.268148] raw: 0000000000000000 0000000000110011 00000001ffffffff ffff8880168aee01 [ 26.269058] page dumped because: kasan: bad access detected [ 26.269718] [ 26.269936] Memory state around the buggy address: [ 26.270513] ffff888017700780: fb fb fb fb fb fb fb fb fb fb fb fb fb fc fc fc [ 26.271363] ffff888017700800: fc fc fc fc fc fa fb fb fb fb fb fb fb fb fb fb [ 26.272219] >ffff888017700880: fb fb fb fb fb fb fb fb fb fb fc fc fc fc fc fc [ 26.273080] ^ [ 26.273495] ffff888017700900: fc fc fa fb fb fb fb fb fb fb fb fb fb fb fb fb [ 26.274353] ffff888017700980: fb fb fb fb fb fb fb fc fc fc fc fc fc fc fc 00 [ 26.275191] ================================================================== [ 26.276101] Disabling lock debugging due to kernel taint Debian GNU/Linux 11 syzkaller ttyS0 syzkaller login: [ 28.575141] BUG: Bad rss-counter state mm:0000000026e82f8e type:MM_FILEPAGES val:33 [ 28.577087] BUG: Bad rss-counter state mm:0000000026e82f8e type:MM_ANONPAGES val:22 [ 28.991629] BUG: Bad rss-counter state mm:000000000b6a218d type:MM_FILEPAGES val:33 [ 28.992646] BUG: Bad rss-counter state mm:000000000b6a218d type:MM_ANONPAGES val:22 Warning: Permanently added '[localhost]:57118' (ECDSA) to the list of known hosts. 2023/06/20 07:48:05 fuzzer started 2023/06/20 07:48:05 dialing manager at localhost:44161 2023/06/20 07:48:05 checking machine... 2023/06/20 07:48:05 checking revisions... [ 29.691328] kmemleak: Automatic memory scanning thread ended 2023/06/20 07:48:05 testing simple program... [ 29.745673] cgroup: Unknown subsys name 'net' [ 29.783715] cgroup: Unknown subsys name 'rlimit' executing program executing program executing program VM DIAGNOSIS: 07:48:03 Registers: info registers vcpu 0 RAX=dffffc0000000000 RBX=ffffffff83642d12 RCX=0000000000000001 RDX=1ffff11002d4ae7c RSI=ffff888016a57c80 RDI=ffffffff83642d12 RBP=ffff888016a573e0 RSP=ffff888016a57358 R8 =0000000000000001 R9 =ffff888016a573c8 R10=0000000000038001 R11=000000000008a85c R12=ffff888016a57450 R13=0000000000000000 R14=ffff88800fa63680 R15=00000000000128c0 RIP=ffffffff811fc7a0 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 00007f8c438d4900 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=00007f8c43e8b618 CR3=000000000f266000 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=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 info registers vcpu 1 RAX=0000000000000003 RBX=0000000000000001 RCX=1ffffffff0ba7a02 RDX=0000000000000000 RSI=0000000000000008 RDI=ffffffff85d3bed0 RBP=ffffffff81371069 RSP=ffff8880087ff6d0 R8 =0000000000000000 R9 =0000000000000000 R10=ffffffff85d3bed7 R11=00000000000b6996 R12=00000000000000a1 R13=ffff88806cf3a3a8 R14=ffff88806cf3a2c0 R15=0000000000000000 RIP=ffffffff812d145f 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 00007f869692c900 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=00005593f7e0b400 CR3=0000000008d9a000 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=00000000000000000000ff000000ff00 XMM02=00000000000001110000000065636976 XMM03=79732f6563696c732e6d65747379732f XMM04=2e2e2e2e2e2e2e2e2e2e2e2e2e2e2e2e XMM05=000000000000000000005593f7e90420 XMM06=00000000000000210000000000000000 XMM07=00000000000000000000000000000000 XMM08=65784500657250747261745363657845 XMM09=00000000000000000000000000000000 XMM10=00000000000000000000000000000000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000