[ 30.569185] BUG: Bad rss-counter state mm:0000000003948b61 type:MM_FILEPAGES val:33 [ 30.570023] BUG: Bad rss-counter state mm:0000000003948b61 type:MM_ANONPAGES val:22 [ 30.659916] ================================================================== [ 30.660550] BUG: KASAN: slab-use-after-free in vma_interval_tree_remove+0xc75/0xec0 [ 30.661264] Read of size 8 at addr ffff88800dfe55c8 by task sshd/220 [ 30.661822] [ 30.661990] CPU: 0 PID: 220 Comm: sshd Not tainted 6.4.0-rc7-next-20230620 #1 [ 30.662628] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS 1.12.0-1 04/01/2014 [ 30.663380] Call Trace: [ 30.663617] <TASK> [ 30.663839] dump_stack_lvl+0x91/0xf0 [ 30.664216] print_report+0xcc/0x620 [ 30.664564] ? __virt_addr_valid+0x102/0x340 [ 30.664978] ? vma_interval_tree_remove+0xc75/0xec0 [ 30.665430] ? vma_interval_tree_remove+0xc75/0xec0 [ 30.666137] kasan_report+0xbe/0xf0 [ 30.666510] ? vma_interval_tree_remove+0xc75/0xec0 [ 30.666965] vma_interval_tree_remove+0xc75/0xec0 [ 30.667388] vma_prepare+0xc54/0x11a0 [ 30.667761] __split_vma+0x5af/0x950 [ 30.668116] ? __pfx___split_vma+0x10/0x10 [ 30.668498] ? find_held_lock+0x2c/0x110 [ 30.668879] do_vmi_align_munmap+0x2ba/0x11f0 [ 30.669301] ? lock_is_held_type+0x9f/0x120 [ 30.669704] ? __pfx_do_vmi_align_munmap+0x10/0x10 [ 30.670154] ? mtree_range_walk+0x632/0x900 [ 30.670563] ? mas_walk+0x5c7/0x7c0 [ 30.670926] do_vmi_munmap+0x1f1/0x2b0 [ 30.671322] mmap_region+0x1f9/0x2660 [ 30.671691] ? vm_mmap_pgoff+0x15c/0x3a0 [ 30.672078] ? __pfx_arch_get_unmapped_area_topdown+0x10/0x10 [ 30.672639] ? __pfx_lock_acquire+0x10/0x10 [ 30.673044] ? __pfx_mmap_region+0x10/0x10 [ 30.673431] ? security_mmap_addr+0x7d/0xa0 [ 30.673832] ? get_unmapped_area+0x1f5/0x3f0 [ 30.674261] do_mmap+0x854/0xf00 [ 30.674586] vm_mmap_pgoff+0x1a6/0x3a0 [ 30.674961] ? __pfx_vm_mmap_pgoff+0x10/0x10 [ 30.675416] ksys_mmap_pgoff+0x3af/0x500 [ 30.675798] do_syscall_64+0x3f/0x90 [ 30.676157] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 30.676648] RIP: 0033:0x7fc6285d9d82 [ 30.677002] 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 [ 30.678588] RSP: 002b:00007fffe3320638 EFLAGS: 00000206 ORIG_RAX: 0000000000000009 [ 30.679317] RAX: ffffffffffffffda RBX: 0000000000000812 RCX: 00007fc6285d9d82 [ 30.679949] RDX: 0000000000000005 RSI: 0000000000001000 RDI: 00007fc627a13000 [ 30.680570] RBP: 00007fc627a13000 R08: 0000000000000009 R09: 0000000000001000 [ 30.681217] R10: 0000000000000812 R11: 0000000000000206 R12: 00005569e2301b20 [ 30.681841] R13: 00007fffe3320650 R14: 00007fffe3320680 R15: 00007fffe33209e0 [ 30.682475] </TASK> [ 30.682695] [ 30.682857] Allocated by task 212: [ 30.683191] kasan_save_stack+0x22/0x50 [ 30.683596] kasan_set_track+0x25/0x30 [ 30.683972] __kasan_slab_alloc+0x59/0x70 [ 30.684372] kmem_cache_alloc+0x16b/0x370 [ 30.684752] vm_area_dup+0x20/0x160 [ 30.685109] __split_vma+0x170/0x950 [ 30.685448] split_vma+0xc6/0x110 [ 30.685770] mprotect_fixup+0x8d2/0xb30 [ 30.686145] do_mprotect_pkey+0x87e/0xd40 [ 30.686526] __x64_sys_mprotect+0x78/0xc0 [ 30.686908] do_syscall_64+0x3f/0x90 [ 30.687293] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 30.687772] [ 30.687928] Freed by task 212: [ 30.688239] kasan_save_stack+0x22/0x50 [ 30.688614] kasan_set_track+0x25/0x30 [ 30.689016] kasan_save_free_info+0x2b/0x50 [ 30.689420] __kasan_slab_free+0x10a/0x190 [ 30.689830] kmem_cache_free+0x10d/0x4d0 [ 30.690220] rcu_core+0x8c8/0x2860 [ 30.690552] __do_softirq+0x1b7/0x7d4 [ 30.690907] [ 30.691071] Last potentially related work creation: [ 30.691528] kasan_save_stack+0x22/0x50 [ 30.691906] __kasan_record_aux_stack+0x8e/0xa0 [ 30.692333] __call_rcu_common.constprop.0+0x6a/0xb90 [ 30.692805] remove_vma+0x139/0x170 [ 30.693149] do_vmi_align_munmap+0xd4a/0x11f0 [ 30.693576] do_vmi_munmap+0x1f1/0x2b0 [ 30.693942] __vm_munmap+0x138/0x3a0 [ 30.694306] __x64_sys_munmap+0x59/0x80 [ 30.694677] do_syscall_64+0x3f/0x90 [ 30.695032] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 30.695527] [ 30.695690] Second to last potentially related work creation: [ 30.696206] kasan_save_stack+0x22/0x50 [ 30.696588] __kasan_record_aux_stack+0x8e/0xa0 [ 30.697010] __call_rcu_common.constprop.0+0x6a/0xb90 [ 30.697515] remove_vma+0x139/0x170 [ 30.697850] do_vmi_align_munmap+0xd4a/0x11f0 [ 30.698264] do_vmi_munmap+0x1f1/0x2b0 [ 30.698623] mmap_region+0x1f9/0x2660 [ 30.699113] do_mmap+0x854/0xf00 [ 30.699423] vm_mmap_pgoff+0x1a6/0x3a0 [ 30.699792] ksys_mmap_pgoff+0x3af/0x500 [ 30.700186] do_syscall_64+0x3f/0x90 [ 30.700537] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 30.701012] [ 30.701174] The buggy address belongs to the object at ffff88800dfe5570 [ 30.701174] which belongs to the cache vm_area_struct of size 168 [ 30.702238] The buggy address is located 88 bytes inside of [ 30.702238] freed 168-byte region [ffff88800dfe5570, ffff88800dfe5618) [ 30.703253] [ 30.703422] The buggy address belongs to the physical page: [ 30.703911] page:0000000059eef7c4 refcount:1 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0xdfe5 [ 30.704752] memcg:ffff88800c5a2901 [ 30.705090] flags: 0x100000000000200(slab|node=0|zone=1) [ 30.705583] page_type: 0xffffffff() [ 30.705938] raw: 0100000000000200 ffff8880087a0c80 ffffea000039ee40 dead000000000006 [ 30.706648] raw: 0000000000000000 0000000000110011 00000001ffffffff ffff88800c5a2901 [ 30.707383] page dumped because: kasan: bad access detected [ 30.707893] [ 30.708063] Memory state around the buggy address: [ 30.708505] ffff88800dfe5480: fc fa fb fb fb fb fb fb fb fb fb fb fb fb fb fb [ 30.709156] ffff88800dfe5500: fb fb fb fb fb fb fc fc fc fc fc fc fc fc fa fb [ 30.709808] >ffff88800dfe5580: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb [ 30.710492] ^ [ 30.711004] ffff88800dfe5600: fb fb fb fc fc fc fc fc fc fc fc 00 00 00 00 00 [ 30.711665] ffff88800dfe5680: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 [ 30.712314] ================================================================== [ 30.713291] Disabling lock debugging due to kernel taint Debian GNU/Linux 11 syzkaller ttyS0 syzkaller login: [ 32.574722] BUG: Bad rss-counter state mm:00000000992cdf35 type:MM_FILEPAGES val:33 [ 32.575406] BUG: Bad rss-counter state mm:00000000992cdf35 type:MM_ANONPAGES val:22 [ 33.116223] BUG: Bad rss-counter state mm:00000000ef2c8217 type:MM_FILEPAGES val:32 [ 33.116999] BUG: Bad rss-counter state mm:00000000ef2c8217 type:MM_ANONPAGES val:22 Warning: Permanently added '[localhost]:37972' (ECDSA) to the list of known hosts. 2023/06/21 08:02:00 fuzzer started 2023/06/21 08:02:00 dialing manager at localhost:36067 2023/06/21 08:02:00 checking machine... 2023/06/21 08:02:00 checking revisions... [ 33.726535] kmemleak: Automatic memory scanning thread ended 2023/06/21 08:02:00 testing simple program... [ 33.777112] cgroup: Unknown subsys name 'net' [ 33.830323] cgroup: Unknown subsys name 'rlimit' executing program executing program executing program VM DIAGNOSIS: 08:02:00 Registers: info registers vcpu 0 RAX=0000000000000000 RBX=0000000000000002 RCX=0000000000000000 RDX=ffff888014293680 RSI=ffffffff811431df RDI=0000000000000006 RBP=00000000143348d0 RSP=ffff8880159bfa78 R8 =0000000000000006 R9 =0000000000000002 R10=0000000000080000 R11=00000000000b6a61 R12=0000000000000000 R13=0000000000000800 R14=ffffffff81768f04 R15=ffff88800daefc80 RIP=ffffffff814c0860 RFL=00000256 [---ZAP-] 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=00007f41cc1ef328 CR3=000000000e9f2000 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=652022746f6f72223d74636361207469 XMM02=3d6c616e696d72657420322e322e302e XMM03=3d656d616e74736f682022646873732f XMM04=40404040404040404040404040404040 XMM05=5a5a5a5a5a5a5a5a5a5a5a5a5a5a5a5a XMM06=20202020202020202020202020202020 XMM07=00000000000000000000000000000000 XMM08=652075253d64692073253d706f000000 XMM09=00000000000000000000000000000000 XMM10=00000000000000000000000000000000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000 info registers vcpu 1 RAX=ffff88806cf3de00 RBX=0000000000092cc0 RCX=ffffffff812d86ea RDX=dffffc0000000000 RSI=0000000000092cc0 RDI=0000000000db39c1 RBP=ffff88800fcbf888 RSP=ffff88800fcbf840 R8 =0000000000000000 R9 =fffffbfff0ba7a6a R10=ffffffff85d3d357 R11=00000000000b6a61 R12=ffff88800844f780 R13=0000000000000000 R14=0000000000000000 R15=ffffffff8184725c RIP=ffffffff818081f9 RFL=00000282 [--S----] 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 00007ffbbbb85900 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=00007f11280c6b60 CR3=000000000ea06000 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