[ 24.928049] BUG: Bad rss-counter state mm:00000000a15a2b96 type:MM_FILEPAGES val:33 [ 24.929224] BUG: Bad rss-counter state mm:00000000a15a2b96 type:MM_ANONPAGES val:22 [ 24.965335] ================================================================== [ 24.966348] BUG: KASAN: slab-use-after-free in vma_interval_tree_remove+0xc75/0xec0 [ 24.967342] Read of size 8 at addr ffff88800e63a880 by task sshd/220 [ 24.968170] [ 24.968459] CPU: 1 PID: 220 Comm: sshd Not tainted 6.4.0-rc7-next-20230619 #1 [ 24.969291] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS 1.12.0-1 04/01/2014 [ 24.970240] Call Trace: [ 24.970571] [ 24.970849] dump_stack_lvl+0x91/0xf0 [ 24.971333] print_report+0xcc/0x620 [ 24.971803] ? __virt_addr_valid+0x102/0x340 [ 24.972342] ? vma_interval_tree_remove+0xc75/0xec0 [ 24.972933] ? vma_interval_tree_remove+0xc75/0xec0 [ 24.973537] kasan_report+0xbe/0xf0 [ 24.974008] ? vma_interval_tree_remove+0xc75/0xec0 [ 24.974630] vma_interval_tree_remove+0xc75/0xec0 [ 24.975231] vma_prepare+0xc54/0x11a0 [ 24.975693] __split_vma+0x5af/0x950 [ 24.976148] ? __pfx___split_vma+0x10/0x10 [ 24.976656] ? find_held_lock+0x2c/0x110 [ 24.977158] do_vmi_align_munmap+0x2ba/0x11f0 [ 24.977703] ? lock_is_held_type+0x9f/0x120 [ 24.978235] ? __pfx_do_vmi_align_munmap+0x10/0x10 [ 24.978821] ? mtree_range_walk+0x632/0x900 [ 24.979352] ? mas_walk+0x5c7/0x7c0 [ 24.979809] do_vmi_munmap+0x1f1/0x2b0 [ 24.980286] mmap_region+0x1f9/0x2660 [ 24.980753] ? vm_mmap_pgoff+0x15c/0x3a0 [ 24.981247] ? __pfx_arch_get_unmapped_area_topdown+0x10/0x10 [ 24.981934] ? __pfx_lock_acquire+0x10/0x10 [ 24.982463] ? __pfx_mmap_region+0x10/0x10 [ 24.982974] ? security_mmap_addr+0x7d/0xa0 [ 24.983493] ? get_unmapped_area+0x1f5/0x3f0 [ 24.984036] do_mmap+0x854/0xf00 [ 24.984464] vm_mmap_pgoff+0x1a6/0x3a0 [ 24.984944] ? __pfx_vm_mmap_pgoff+0x10/0x10 [ 24.985491] ksys_mmap_pgoff+0x3af/0x500 [ 24.985987] do_syscall_64+0x3f/0x90 [ 24.986453] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 24.987077] RIP: 0033:0x7f8fe2a18d82 [ 24.987521] 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 [ 24.989569] RSP: 002b:00007fffba2fc588 EFLAGS: 00000206 ORIG_RAX: 0000000000000009 [ 24.990452] RAX: ffffffffffffffda RBX: 0000000000000812 RCX: 00007f8fe2a18d82 [ 24.991267] RDX: 0000000000000005 RSI: 0000000000001000 RDI: 00007f8fe1e52000 [ 24.992081] RBP: 00007f8fe1e52000 R08: 0000000000000009 R09: 0000000000001000 [ 24.992899] R10: 0000000000000812 R11: 0000000000000206 R12: 00005589cacc4d90 [ 24.993735] R13: 00007fffba2fc5a0 R14: 00007fffba2fc5d0 R15: 00007fffba2fc930 [ 24.994575] [ 24.994860] [ 24.995071] Allocated by task 213: [ 24.995489] kasan_save_stack+0x22/0x50 [ 24.995977] kasan_set_track+0x25/0x30 [ 24.996458] __kasan_slab_alloc+0x59/0x70 [ 24.996963] kmem_cache_alloc+0x16b/0x370 [ 24.997464] vm_area_dup+0x20/0x160 [ 24.997903] __split_vma+0x170/0x950 [ 24.998361] split_vma+0xc6/0x110 [ 24.998788] mprotect_fixup+0x8d2/0xb30 [ 24.999274] do_mprotect_pkey+0x87e/0xd40 [ 24.999777] __x64_sys_mprotect+0x78/0xc0 [ 25.000280] do_syscall_64+0x3f/0x90 [ 25.000737] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 25.001361] [ 25.001569] Freed by task 204: [ 25.001946] kasan_save_stack+0x22/0x50 [ 25.002437] kasan_set_track+0x25/0x30 [ 25.002915] kasan_save_free_info+0x2b/0x50 [ 25.003429] __kasan_slab_free+0x10a/0x190 [ 25.004015] kmem_cache_free+0x10d/0x4d0 [ 25.004516] rcu_core+0x8c8/0x2860 [ 25.004945] __do_softirq+0x1b7/0x7d4 [ 25.005406] [ 25.005614] Last potentially related work creation: [ 25.006202] kasan_save_stack+0x22/0x50 [ 25.006692] __kasan_record_aux_stack+0x8e/0xa0 [ 25.007253] __call_rcu_common.constprop.0+0x6a/0xb90 [ 25.007874] remove_vma+0x139/0x170 [ 25.008311] do_vmi_align_munmap+0xd4a/0x11f0 [ 25.008851] do_vmi_munmap+0x1f1/0x2b0 [ 25.009318] __vm_munmap+0x138/0x3a0 [ 25.009772] __x64_sys_munmap+0x59/0x80 [ 25.010263] do_syscall_64+0x3f/0x90 [ 25.010719] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 25.011335] [ 25.011543] The buggy address belongs to the object at ffff88800e63a828 [ 25.011543] which belongs to the cache vm_area_struct of size 168 [ 25.012961] The buggy address is located 88 bytes inside of [ 25.012961] freed 168-byte region [ffff88800e63a828, ffff88800e63a8d0) [ 25.014398] [ 25.014609] The buggy address belongs to the physical page: [ 25.015261] page:0000000096d9d20f refcount:1 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0xe63a [ 25.016308] memcg:ffff88800fff6601 [ 25.016731] anon flags: 0x100000000000200(slab|node=0|zone=1) [ 25.017408] page_type: 0xffffffff() [ 25.017849] raw: 0100000000000200 ffff88800879fc80 ffffea0000359680 dead000000000005 [ 25.018764] raw: 0000000000000000 0000000000110011 00000001ffffffff ffff88800fff6601 [ 25.019643] page dumped because: kasan: bad access detected [ 25.020287] [ 25.020497] Memory state around the buggy address: [ 25.021055] ffff88800e63a780: fb fb fb fb fb fb fb fb fb fb fb fb fb fc fc fc [ 25.021895] ffff88800e63a800: fc fc fc fc fc fa fb fb fb fb fb fb fb fb fb fb [ 25.022750] >ffff88800e63a880: fb fb fb fb fb fb fb fb fb fb fc fc fc fc fc fc [ 25.023581] ^ [ 25.023979] ffff88800e63a900: fc fc 00 00 00 00 00 00 00 00 00 00 00 00 00 00 [ 25.024806] ffff88800e63a980: 00 00 00 00 00 00 00 fc fc fc fc fc fc fc fc 00 [ 25.025633] ================================================================== [ 25.026735] Disabling lock debugging due to kernel taint Debian GNU/Linux 11 syzkaller ttyS0 syzkaller login: [ 27.484615] BUG: Bad rss-counter state mm:0000000061ce1d2d type:MM_FILEPAGES val:33 [ 27.486431] BUG: Bad rss-counter state mm:0000000061ce1d2d type:MM_ANONPAGES val:22 [ 27.974636] BUG: Bad rss-counter state mm:00000000e767aa4a type:MM_FILEPAGES val:33 [ 27.976142] BUG: Bad rss-counter state mm:00000000e767aa4a type:MM_ANONPAGES val:22 Warning: Permanently added '[localhost]:45495' (ECDSA) to the list of known hosts. 2023/06/19 19:53:17 fuzzer started 2023/06/19 19:53:17 dialing manager at localhost:44161 2023/06/19 19:53:18 checking machine... 2023/06/19 19:53:18 checking revisions... [ 28.794690] kmemleak: Automatic memory scanning thread ended 2023/06/19 19:53:18 testing simple program... [ 28.826709] cgroup: Unknown subsys name 'net' [ 28.860546] cgroup: Unknown subsys name 'rlimit' executing program executing program executing program VM DIAGNOSIS: 19:53:16 Registers: info registers vcpu 0 RAX=ffff88806ce35000 RBX=0000000000000000 RCX=ffffffff8450c50e RDX=ffffed100d9c6a01 RSI=0000000000000004 RDI=ffffffff812889a5 RBP=dffffc0000000000 RSP=ffffffff85407e10 R8 =0000000000000000 R9 =ffffed100d9c6a00 R10=ffff88806ce35003 R11=ffff888008c58000 R12=ffffffff85d3bed0 R13=1ffffffff0a80fc7 R14=0000000000000000 R15=0000000000000000 RIP=ffffffff8450d49f 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 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=00007f9b64286a90 CR3=000000000d7f6000 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=2037313a33353a3931203931206e754a XMM01=73732878696e755f6d6170203a5d3932 XMM02=65736f6c63206e6f6973736573203a29 XMM03=755f6d6170203a5d3932325b64687373 XMM04=69662068637573206f4e203a656c6163 XMM05=3a656c696620766e65206e65706f206f XMM06=65733a6468737328766e655f6d617020 XMM07=6b7a79732037313a33353a3931203931 XMM08=3d656e696c646d632022656369767265 XMM09=00000000000000000000000000000000 XMM10=00000000000000000000000000000000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000 info registers vcpu 1 RAX=00007f46d85f7080 RBX=00007ffdf971d60c RCX=0000000000000000 RDX=0000000000000001 RSI=0000000000000001 RDI=00007f46d85f6990 RBP=00007ffdf971d6e0 RSP=00007ffdf971d450 R8 =0000000000000000 R9 =00007ffdf971d5e0 R10=000000000000002c R11=0000000000000202 R12=00007f46d85f7180 R13=00007f46d85f6060 R14=000055f3c75078c0 R15=0000000000000000 RIP=00007f46d85dff04 RFL=00000297 [--S-APC] CPL=3 II=0 A20=1 SMM=0 HLT=0 ES =0000 0000000000000000 00000000 00000000 CS =0033 0000000000000000 ffffffff 00a0fb00 DPL=3 CS64 [-RA] SS =002b 0000000000000000 ffffffff 00c0f300 DPL=3 DS [-WA] DS =0000 0000000000000000 00000000 00000000 FS =0000 00007f46d7a54900 00000000 00000000 GS =0000 0000000000000000 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=00007f46d7a33020 CR3=000000001ca64000 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=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