syzkaller login: [ 32.833882] BUG: Bad rss-counter state mm:00000000203c9b5a type:MM_FILEPAGES val:33 [ 32.835502] BUG: Bad rss-counter state mm:00000000203c9b5a type:MM_ANONPAGES val:22 [ 32.990869] ================================================================== [ 32.991568] BUG: KASAN: slab-use-after-free in vma_interval_tree_remove+0xc75/0xec0 [ 32.992293] Read of size 8 at addr ffff88801a1b1140 by task sshd/222 [ 32.992878] [ 32.993045] CPU: 0 PID: 222 Comm: sshd Not tainted 6.4.0-rc7-next-20230619 #1 [ 32.993708] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS 1.12.0-1 04/01/2014 [ 32.994446] Call Trace: [ 32.994691] [ 32.995000] dump_stack_lvl+0x91/0xf0 [ 32.995324] print_report+0xcc/0x620 [ 32.995587] ? __virt_addr_valid+0x102/0x340 [ 32.995892] ? vma_interval_tree_remove+0xc75/0xec0 [ 32.996235] ? vma_interval_tree_remove+0xc75/0xec0 [ 32.996572] kasan_report+0xbe/0xf0 [ 32.996832] ? vma_interval_tree_remove+0xc75/0xec0 [ 32.997192] vma_interval_tree_remove+0xc75/0xec0 [ 32.997522] vma_prepare+0xc54/0x11a0 [ 32.997782] __split_vma+0x5af/0x950 [ 32.998045] ? __pfx___split_vma+0x10/0x10 [ 32.998342] ? find_held_lock+0x2c/0x110 [ 32.998624] do_vmi_align_munmap+0x2ba/0x11f0 [ 32.998929] ? lock_is_held_type+0x9f/0x120 [ 32.999223] ? __pfx_do_vmi_align_munmap+0x10/0x10 [ 32.999553] ? mtree_range_walk+0x632/0x900 [ 32.999859] ? mas_walk+0x5c7/0x7c0 [ 33.000119] do_vmi_munmap+0x1f1/0x2b0 [ 33.000397] mmap_region+0x1f9/0x2660 [ 33.000683] ? vm_mmap_pgoff+0x15c/0x3a0 [ 33.000982] ? __pfx_arch_get_unmapped_area_topdown+0x10/0x10 [ 33.001398] ? __pfx_lock_acquire+0x10/0x10 [ 33.001703] ? __pfx_mmap_region+0x10/0x10 [ 33.001998] ? security_mmap_addr+0x7d/0xa0 [ 33.002297] ? get_unmapped_area+0x1f5/0x3f0 [ 33.002610] do_mmap+0x854/0xf00 [ 33.002858] vm_mmap_pgoff+0x1a6/0x3a0 [ 33.003138] ? __pfx_vm_mmap_pgoff+0x10/0x10 [ 33.003459] ksys_mmap_pgoff+0x3af/0x500 [ 33.003762] do_syscall_64+0x3f/0x90 [ 33.004038] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 33.004410] RIP: 0033:0x7f9d83487d82 [ 33.004672] 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 [ 33.005895] RSP: 002b:00007fffc0f51c08 EFLAGS: 00000206 ORIG_RAX: 0000000000000009 [ 33.006417] RAX: ffffffffffffffda RBX: 0000000000000812 RCX: 00007f9d83487d82 [ 33.006909] RDX: 0000000000000005 RSI: 0000000000001000 RDI: 00007f9d828c1000 [ 33.007398] RBP: 00007f9d828c1000 R08: 0000000000000009 R09: 0000000000001000 [ 33.007891] R10: 0000000000000812 R11: 0000000000000206 R12: 00005653e4d38d90 [ 33.008390] R13: 00007fffc0f51c20 R14: 00007fffc0f51c50 R15: 00007fffc0f51fb0 [ 33.008876] [ 33.009042] [ 33.009165] Allocated by task 215: [ 33.009422] kasan_save_stack+0x22/0x50 [ 33.009717] kasan_set_track+0x25/0x30 [ 33.009997] __kasan_slab_alloc+0x59/0x70 [ 33.010293] kmem_cache_alloc+0x16b/0x370 [ 33.010589] vm_area_dup+0x20/0x160 [ 33.010845] __split_vma+0x170/0x950 [ 33.011111] split_vma+0xc6/0x110 [ 33.011357] mprotect_fixup+0x8d2/0xb30 [ 33.011652] do_mprotect_pkey+0x87e/0xd40 [ 33.011962] __x64_sys_mprotect+0x78/0xc0 [ 33.012254] do_syscall_64+0x3f/0x90 [ 33.012529] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 33.012895] [ 33.013017] Freed by task 205: [ 33.013249] kasan_save_stack+0x22/0x50 [ 33.013539] kasan_set_track+0x25/0x30 [ 33.013822] kasan_save_free_info+0x2b/0x50 [ 33.014118] __kasan_slab_free+0x10a/0x190 [ 33.014423] kmem_cache_free+0x10d/0x4d0 [ 33.014718] rcu_core+0x8c8/0x2860 [ 33.014972] __do_softirq+0x1b7/0x7d4 [ 33.015251] [ 33.015370] Last potentially related work creation: [ 33.015712] kasan_save_stack+0x22/0x50 [ 33.015995] __kasan_record_aux_stack+0x8e/0xa0 [ 33.016322] __call_rcu_common.constprop.0+0x6a/0xb90 [ 33.016695] remove_vma+0x139/0x170 [ 33.016947] do_vmi_align_munmap+0xd4a/0x11f0 [ 33.017263] do_vmi_munmap+0x1f1/0x2b0 [ 33.017538] __vm_munmap+0x138/0x3a0 [ 33.017810] __x64_sys_munmap+0x59/0x80 [ 33.018091] do_syscall_64+0x3f/0x90 [ 33.018354] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 33.018718] [ 33.018846] The buggy address belongs to the object at ffff88801a1b10e8 [ 33.018846] which belongs to the cache vm_area_struct of size 168 [ 33.019702] The buggy address is located 88 bytes inside of [ 33.019702] freed 168-byte region [ffff88801a1b10e8, ffff88801a1b1190) [ 33.020524] [ 33.020647] The buggy address belongs to the physical page: [ 33.021024] page:000000000ed33d04 refcount:1 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0x1a1b1 [ 33.021655] memcg:ffff888018ee0001 [ 33.021900] flags: 0x100000000000200(slab|node=0|zone=1) [ 33.022275] page_type: 0xffffffff() [ 33.022546] raw: 0100000000000200 ffff88800879fc80 dead000000000122 0000000000000000 [ 33.023077] raw: 0000000000000000 0000000000110011 00000001ffffffff ffff888018ee0001 [ 33.023597] page dumped because: kasan: bad access detected [ 33.023979] [ 33.024100] Memory state around the buggy address: [ 33.024447] ffff88801a1b1000: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 [ 33.024936] ffff88801a1b1080: 00 00 00 00 00 fc fc fc fc fc fc fc fc fa fb fb [ 33.025438] >ffff88801a1b1100: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb [ 33.025928] ^ [ 33.026296] ffff88801a1b1180: fb fb fc fc fc fc fc fc fc fc fa fb fb fb fb fb [ 33.026789] ffff88801a1b1200: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fc [ 33.027285] ================================================================== [ 33.027844] Disabling lock debugging due to kernel taint [ 34.966553] BUG: Bad rss-counter state mm:00000000954dbafb type:MM_FILEPAGES val:33 [ 34.967722] BUG: Bad rss-counter state mm:00000000954dbafb type:MM_ANONPAGES val:22 [ 35.368480] BUG: Bad rss-counter state mm:00000000b397876d type:MM_FILEPAGES val:33 [ 35.369733] BUG: Bad rss-counter state mm:00000000b397876d type:MM_ANONPAGES val:22 Warning: Permanently added '[localhost]:45475' (ECDSA) to the list of known hosts. 2023/06/20 04:04:25 fuzzer started 2023/06/20 04:04:25 dialing manager at localhost:44161 2023/06/20 04:04:25 checking machine... 2023/06/20 04:04:25 checking revisions... [ 36.095341] kmemleak: Automatic memory scanning thread ended 2023/06/20 04:04:25 testing simple program... [ 36.147502] cgroup: Unknown subsys name 'net' [ 36.197038] cgroup: Unknown subsys name 'rlimit' executing program executing program executing program VM DIAGNOSIS: 04:04:23 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=00007fcd0c248a70 CR3=000000000f6a6000 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=57c12f85a088739ecf40dc05617e6368 XMM02=000000000011cf78eff9b2d0a8fce9cb XMM03=000000000011d0482c67c8bc2e329bc3 XMM04=0681cbef77b7263800000000000ae988 XMM05=60ed93461a30edf100000000001352b0 XMM06=00c3ffa147b8d8570000000000134350 XMM07=e042d86d42eb936e0000000000124be8 XMM08=3cb7aa6aa9bf8123000000000011d048 XMM09=00000000000000000000000000000000 XMM10=20200000000020202020202020200000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000 info registers vcpu 1 RAX=0000000000038000 RBX=0000000000000001 RCX=ffffffff813ad6cf RDX=dffffc0000000000 RSI=0000000000003ad6 RDI=ffff888016c1f6e0 RBP=ffff888016c1f738 RSP=ffff888016c1f670 R8 =0000000000000001 R9 =ffff888016c1f720 R10=0000000000038001 R11=0000000000003c0d R12=ffff888016c1f740 R13=ffff888016c1f728 R14=ffff888016c1f721 R15=ffff888016c1f6e0 RIP=ffffffff81130754 RFL=00000283 [--S---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 00007f4d07259900 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=00007fff1aa52000 CR3=000000001c842000 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=6720646572637465733a4d41503d706f 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