[ 24.109270] BUG: Bad rss-counter state mm:00000000d22fb8ae type:MM_FILEPAGES val:33 [ 24.110285] BUG: Bad rss-counter state mm:00000000d22fb8ae type:MM_ANONPAGES val:22 [ 24.270823] ================================================================== [ 24.271911] BUG: KASAN: slab-use-after-free in vma_interval_tree_remove+0xc75/0xec0 [ 24.273017] Read of size 8 at addr ffff88801bd49310 by task sshd/218 [ 24.274162] [ 24.274431] CPU: 1 PID: 218 Comm: sshd Not tainted 6.4.0-rc7-next-20230620 #1 [ 24.275420] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS 1.12.0-1 04/01/2014 [ 24.276393] Call Trace: [ 24.276715] [ 24.276996] dump_stack_lvl+0x91/0xf0 [ 24.277494] print_report+0xcc/0x620 [ 24.277981] ? __virt_addr_valid+0x102/0x340 [ 24.278539] ? vma_interval_tree_remove+0xc75/0xec0 [ 24.279146] ? vma_interval_tree_remove+0xc75/0xec0 [ 24.279755] kasan_report+0xbe/0xf0 [ 24.280228] ? vma_interval_tree_remove+0xc75/0xec0 [ 24.280848] vma_interval_tree_remove+0xc75/0xec0 [ 24.281451] vma_prepare+0xc54/0x11a0 [ 24.281927] __split_vma+0x5af/0x950 [ 24.282409] ? __pfx___split_vma+0x10/0x10 [ 24.282941] ? find_held_lock+0x2c/0x110 [ 24.283460] do_vmi_align_munmap+0x2ba/0x11f0 [ 24.284029] ? lock_is_held_type+0x9f/0x120 [ 24.284568] ? __pfx_do_vmi_align_munmap+0x10/0x10 [ 24.285173] ? mtree_range_walk+0x632/0x900 [ 24.285720] ? mas_walk+0x5c7/0x7c0 [ 24.286213] do_vmi_munmap+0x1f1/0x2b0 [ 24.286706] mmap_region+0x1f9/0x2660 [ 24.287187] ? vm_mmap_pgoff+0x15c/0x3a0 [ 24.287696] ? __pfx_arch_get_unmapped_area_topdown+0x10/0x10 [ 24.288408] ? __pfx_lock_acquire+0x10/0x10 [ 24.288937] ? __pfx_mmap_region+0x10/0x10 [ 24.289462] ? security_mmap_addr+0x7d/0xa0 [ 24.289993] ? get_unmapped_area+0x1f5/0x3f0 [ 24.290551] do_mmap+0x854/0xf00 [ 24.290995] vm_mmap_pgoff+0x1a6/0x3a0 [ 24.291493] ? __pfx_vm_mmap_pgoff+0x10/0x10 [ 24.292054] ksys_mmap_pgoff+0x3af/0x500 [ 24.292559] do_syscall_64+0x3f/0x90 [ 24.293036] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 24.293685] RIP: 0033:0x7fef10e6ad82 [ 24.294158] 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 [ 24.296309] RSP: 002b:00007ffd9d77b958 EFLAGS: 00000206 ORIG_RAX: 0000000000000009 [ 24.297240] RAX: ffffffffffffffda RBX: 0000000000000812 RCX: 00007fef10e6ad82 [ 24.298088] RDX: 0000000000000005 RSI: 0000000000001000 RDI: 00007fef102a4000 [ 24.298936] RBP: 00007fef102a4000 R08: 0000000000000009 R09: 0000000000001000 [ 24.299795] R10: 0000000000000812 R11: 0000000000000206 R12: 000055c7edaa4ec0 [ 24.300635] R13: 00007ffd9d77b970 R14: 00007ffd9d77b9a0 R15: 00007ffd9d77bd00 [ 24.301490] [ 24.301785] [ 24.302005] Allocated by task 208: [ 24.302444] kasan_save_stack+0x22/0x50 [ 24.302943] kasan_set_track+0x25/0x30 [ 24.303431] __kasan_slab_alloc+0x59/0x70 [ 24.303951] kmem_cache_alloc+0x16b/0x370 [ 24.304460] vm_area_dup+0x20/0x160 [ 24.304913] __split_vma+0x170/0x950 [ 24.305373] split_vma+0xc6/0x110 [ 24.305809] mprotect_fixup+0x8d2/0xb30 [ 24.306327] do_mprotect_pkey+0x87e/0xd40 [ 24.306848] __x64_sys_mprotect+0x78/0xc0 [ 24.307384] do_syscall_64+0x3f/0x90 [ 24.307873] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 24.308536] [ 24.308756] Freed by task 208: [ 24.309162] kasan_save_stack+0x22/0x50 [ 24.309685] kasan_set_track+0x25/0x30 [ 24.310200] kasan_save_free_info+0x2b/0x50 [ 24.310752] __kasan_slab_free+0x10a/0x190 [ 24.311299] kmem_cache_free+0x10d/0x4d0 [ 24.311824] rcu_core+0x8c8/0x2860 [ 24.312279] __do_softirq+0x1b7/0x7d4 [ 24.312772] [ 24.312991] Last potentially related work creation: [ 24.313594] kasan_save_stack+0x22/0x50 [ 24.314115] __kasan_record_aux_stack+0x8e/0xa0 [ 24.314729] __call_rcu_common.constprop.0+0x6a/0xb90 [ 24.315481] remove_vma+0x139/0x170 [ 24.315957] do_vmi_align_munmap+0xd4a/0x11f0 [ 24.316532] do_vmi_munmap+0x1f1/0x2b0 [ 24.317036] __vm_munmap+0x138/0x3a0 [ 24.317511] __x64_sys_munmap+0x59/0x80 [ 24.318026] do_syscall_64+0x3f/0x90 [ 24.318532] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 24.319192] [ 24.319412] The buggy address belongs to the object at ffff88801bd492b8 [ 24.319412] which belongs to the cache vm_area_struct of size 168 [ 24.320921] The buggy address is located 88 bytes inside of [ 24.320921] freed 168-byte region [ffff88801bd492b8, ffff88801bd49360) [ 24.322375] [ 24.322597] The buggy address belongs to the physical page: [ 24.323275] page:00000000df57df20 refcount:1 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0x1bd49 [ 24.324402] memcg:ffff88801bd1e801 [ 24.324827] flags: 0x100000000000200(slab|node=0|zone=1) [ 24.325472] page_type: 0xffffffff() [ 24.325916] raw: 0100000000000200 ffff8880087a0c80 dead000000000122 0000000000000000 [ 24.326836] raw: 0000000000000000 0000000000110011 00000001ffffffff ffff88801bd1e801 [ 24.327735] page dumped because: kasan: bad access detected [ 24.328390] [ 24.328605] Memory state around the buggy address: [ 24.329172] ffff88801bd49200: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 fc [ 24.330009] ffff88801bd49280: fc fc fc fc fc fc fc fa fb fb fb fb fb fb fb fb [ 24.330865] >ffff88801bd49300: fb fb fb fb fb fb fb fb fb fb fb fb fc fc fc fc [ 24.331713] ^ [ 24.332171] ffff88801bd49380: fc fc fc fc fa fb fb fb fb fb fb fb fb fb fb fb [ 24.333021] ffff88801bd49400: fb fb fb fb fb fb fb fb fb fc fc fc fc fc fc fc [ 24.333854] ================================================================== [ 24.334889] Disabling lock debugging due to kernel taint Debian GNU/Linux 11 syzkaller ttyS0 syzkaller login: [ 26.670672] BUG: Bad rss-counter state mm:00000000853ad05f type:MM_FILEPAGES val:33 [ 26.671787] BUG: Bad rss-counter state mm:00000000853ad05f type:MM_ANONPAGES val:22 [ 27.085658] BUG: Bad rss-counter state mm:000000005363a33f type:MM_FILEPAGES val:33 [ 27.086844] BUG: Bad rss-counter state mm:000000005363a33f type:MM_ANONPAGES val:22 Warning: Permanently added '[localhost]:28204' (ECDSA) to the list of known hosts. 2023/06/20 21:30:56 fuzzer started 2023/06/20 21:30:57 dialing manager at localhost:36067 2023/06/20 21:30:57 checking machine... 2023/06/20 21:30:57 checking revisions... [ 27.743088] kmemleak: Automatic memory scanning thread ended 2023/06/20 21:30:57 testing simple program... [ 27.788241] cgroup: Unknown subsys name 'net' [ 27.836251] cgroup: Unknown subsys name 'rlimit' executing program executing program executing program VM DIAGNOSIS: 21:30:56 Registers: info registers vcpu 0 RAX=dffffc0000000000 RBX=ffff88806ce09a98 RCX=ffffffff861c8730 RDX=1ffff1100d9c1353 RSI=ffff8880147cfd68 RDI=ffff88806ce09a98 RBP=ffff8880147cfd68 RSP=ffff88806ce099f0 R8 =0000000000000001 R9 =ffff88806ce09ad8 R10=0000000000038001 R11=0000000000038c51 R12=0000000000000008 R13=ffff88806ce09ae0 R14=ffff8880147cfd68 R15=ffff88806ce09a98 RIP=ffffffff81130416 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 00007f23ceeea900 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=00007fffbb47fff8 CR3=000000000d820000 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=ffff888008c04400 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=00007fcd6c7aa000 CR3=000000000f330000 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=2036353a30333a3132203032206e754a XMM01=73732878696e755f6d6170203a5d3732 XMM02=65736f6c63206e6f6973736573203a29 XMM03=755f6d6170203a5d3732325b64687373 XMM04=69662068637573206f4e203a656c6163 XMM05=3a656c696620766e65206e65706f206f XMM06=65733a6468737328766e655f6d617020 XMM07=6b7a79732036353a30333a3132203032 XMM08=69767265733d7373616c63742030733a XMM09=00000000000000000000000000000000 XMM10=00000000000000000000000000000000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000