syzkaller login: [ 32.146338] BUG: Bad rss-counter state mm:000000000648fb0e type:MM_FILEPAGES val:33 [ 32.147074] BUG: Bad rss-counter state mm:000000000648fb0e type:MM_ANONPAGES val:22 [ 32.319417] ================================================================== [ 32.320334] BUG: KASAN: slab-use-after-free in vma_interval_tree_remove+0xc75/0xec0 [ 32.321280] Read of size 8 at addr ffff888016fa5d08 by task sshd/220 [ 32.322167] [ 32.322394] CPU: 0 PID: 220 Comm: sshd Not tainted 6.4.0-rc7-next-20230619 #1 [ 32.323308] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS 1.12.0-1 04/01/2014 [ 32.324320] Call Trace: [ 32.324641] [ 32.324930] dump_stack_lvl+0x91/0xf0 [ 32.325413] print_report+0xcc/0x620 [ 32.325894] ? __virt_addr_valid+0x102/0x340 [ 32.326443] ? vma_interval_tree_remove+0xc75/0xec0 [ 32.327070] ? vma_interval_tree_remove+0xc75/0xec0 [ 32.327689] kasan_report+0xbe/0xf0 [ 32.328161] ? vma_interval_tree_remove+0xc75/0xec0 [ 32.328784] vma_interval_tree_remove+0xc75/0xec0 [ 32.329382] vma_prepare+0xc54/0x11a0 [ 32.329859] __split_vma+0x5af/0x950 [ 32.330332] ? __pfx___split_vma+0x10/0x10 [ 32.330871] ? find_held_lock+0x2c/0x110 [ 32.331397] do_vmi_align_munmap+0x2ba/0x11f0 [ 32.331967] ? lock_is_held_type+0x9f/0x120 [ 32.332506] ? __pfx_do_vmi_align_munmap+0x10/0x10 [ 32.333114] ? mtree_range_walk+0x632/0x900 [ 32.333667] ? mas_walk+0x5c7/0x7c0 [ 32.334143] do_vmi_munmap+0x1f1/0x2b0 [ 32.334629] mmap_region+0x1f9/0x2660 [ 32.335135] ? vm_mmap_pgoff+0x15c/0x3a0 [ 32.335654] ? __pfx_arch_get_unmapped_area_topdown+0x10/0x10 [ 32.336371] ? __pfx_lock_acquire+0x10/0x10 [ 32.336895] ? __pfx_mmap_region+0x10/0x10 [ 32.337422] ? security_mmap_addr+0x7d/0xa0 [ 32.337948] ? get_unmapped_area+0x1f5/0x3f0 [ 32.338489] do_mmap+0x854/0xf00 [ 32.338936] vm_mmap_pgoff+0x1a6/0x3a0 [ 32.339424] ? __pfx_vm_mmap_pgoff+0x10/0x10 [ 32.339976] ksys_mmap_pgoff+0x3af/0x500 [ 32.340488] do_syscall_64+0x3f/0x90 [ 32.340967] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 32.341615] RIP: 0033:0x7f3a0ba94d82 [ 32.342068] 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 [ 32.344193] RSP: 002b:00007ffc47817918 EFLAGS: 00000206 ORIG_RAX: 0000000000000009 [ 32.345100] RAX: ffffffffffffffda RBX: 0000000000000812 RCX: 00007f3a0ba94d82 [ 32.345952] RDX: 0000000000000005 RSI: 0000000000001000 RDI: 00007f3a0aece000 [ 32.346811] RBP: 00007f3a0aece000 R08: 0000000000000009 R09: 0000000000001000 [ 32.347666] R10: 0000000000000812 R11: 0000000000000206 R12: 0000556c6b9a8f70 [ 32.348507] R13: 00007ffc47817930 R14: 00007ffc47817960 R15: 00007ffc47817cc0 [ 32.349365] [ 32.349656] [ 32.349868] Allocated by task 213: [ 32.350293] kasan_save_stack+0x22/0x50 [ 32.350809] kasan_set_track+0x25/0x30 [ 32.351305] __kasan_slab_alloc+0x59/0x70 [ 32.351821] kmem_cache_alloc+0x16b/0x370 [ 32.352333] vm_area_dup+0x20/0x160 [ 32.352786] __split_vma+0x170/0x950 [ 32.353254] split_vma+0xc6/0x110 [ 32.353687] mprotect_fixup+0x8d2/0xb30 [ 32.354184] do_mprotect_pkey+0x87e/0xd40 [ 32.354704] __x64_sys_mprotect+0x78/0xc0 [ 32.355257] do_syscall_64+0x3f/0x90 [ 32.355722] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 32.356352] [ 32.356566] Freed by task 213: [ 32.356959] kasan_save_stack+0x22/0x50 [ 32.357467] kasan_set_track+0x25/0x30 [ 32.357952] kasan_save_free_info+0x2b/0x50 [ 32.358479] __kasan_slab_free+0x10a/0x190 [ 32.359012] kmem_cache_free+0x10d/0x4d0 [ 32.359516] rcu_core+0x8c8/0x2860 [ 32.359958] __do_softirq+0x1b7/0x7d4 [ 32.360431] [ 32.360644] Last potentially related work creation: [ 32.361226] kasan_save_stack+0x22/0x50 [ 32.361734] __kasan_record_aux_stack+0x8e/0xa0 [ 32.362302] __call_rcu_common.constprop.0+0x6a/0xb90 [ 32.362949] remove_vma+0x139/0x170 [ 32.363402] do_vmi_align_munmap+0xd4a/0x11f0 [ 32.363951] do_vmi_munmap+0x1f1/0x2b0 [ 32.364437] __vm_munmap+0x138/0x3a0 [ 32.364900] __x64_sys_munmap+0x59/0x80 [ 32.365392] do_syscall_64+0x3f/0x90 [ 32.365871] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 32.366512] [ 32.366726] The buggy address belongs to the object at ffff888016fa5cb0 [ 32.366726] which belongs to the cache vm_area_struct of size 168 [ 32.368206] The buggy address is located 88 bytes inside of [ 32.368206] freed 168-byte region [ffff888016fa5cb0, ffff888016fa5d58) [ 32.369597] [ 32.369811] The buggy address belongs to the physical page: [ 32.370469] page:00000000088976ff refcount:1 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0x16fa5 [ 32.371561] memcg:ffff888016f47b01 [ 32.371984] flags: 0x100000000000200(slab|node=0|zone=1) [ 32.372626] page_type: 0xffffffff() [ 32.373071] raw: 0100000000000200 ffff88800879fc80 dead000000000122 0000000000000000 [ 32.373987] raw: 0000000000000000 0000000000110011 00000001ffffffff ffff888016f47b01 [ 32.374895] page dumped because: kasan: bad access detected [ 32.375559] [ 32.375789] Memory state around the buggy address: [ 32.376392] ffff888016fa5c00: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 fc fc [ 32.377286] ffff888016fa5c80: fc fc fc fc fc fc fa fb fb fb fb fb fb fb fb fb [ 32.378186] >ffff888016fa5d00: fb fb fb fb fb fb fb fb fb fb fb fc fc fc fc fc [ 32.379050] ^ [ 32.379490] ffff888016fa5d80: fc fc fc fa fb fb fb fb fb fb fb fb fb fb fb fb [ 32.380334] ffff888016fa5e00: fb fb fb fb fb fb fb fb fc fc fc fc fc fc fc fc [ 32.381183] ================================================================== [ 32.382186] Disabling lock debugging due to kernel taint [ 34.477309] BUG: Bad rss-counter state mm:000000002beda534 type:MM_FILEPAGES val:33 [ 34.478362] BUG: Bad rss-counter state mm:000000002beda534 type:MM_ANONPAGES val:22 [ 34.935054] BUG: Bad rss-counter state mm:000000005246395b type:MM_FILEPAGES val:33 [ 34.936117] BUG: Bad rss-counter state mm:000000005246395b type:MM_ANONPAGES val:22 Warning: Permanently added '[localhost]:10427' (ECDSA) to the list of known hosts. 2023/06/20 04:55:46 fuzzer started 2023/06/20 04:55:46 dialing manager at localhost:44161 2023/06/20 04:55:46 checking machine... 2023/06/20 04:55:46 checking revisions... [ 35.659075] kmemleak: Automatic memory scanning thread ended 2023/06/20 04:55:46 testing simple program... [ 35.712167] cgroup: Unknown subsys name 'net' [ 35.758967] cgroup: Unknown subsys name 'rlimit' executing program executing program executing program VM DIAGNOSIS: 04:55:44 Registers: info registers vcpu 0 RAX=dffffc0000000000 RBX=0000000000000001 RCX=0000000000000001 RDX=1ffff1100d9c135f RSI=ffffffff83640764 RDI=ffff88806ce09a98 RBP=ffff88806ce09af0 RSP=ffff88806ce09a28 R8 =0000000000000001 R9 =ffff88806ce09ad8 R10=0000000000038001 R11=000000000008a899 R12=ffff88806ce09af8 R13=ffff88806ce09ae0 R14=ffff88801a16b680 R15=ffff88806ce09a98 RIP=ffffffff81130682 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 00007f897839c900 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=00007f8978951650 CR3=000000000e03a000 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=000000000000000000000000000000ff XMM02=000000000000000000000000000000ff XMM03=5320444f4854454d5f54505952434e45 XMM04=40404040404040404040404040404040 XMM05=5a5a5a5a5a5a5a5a5a5a5a5a5a5a5a5a XMM06=20202020202020202020202020202020 XMM07=00000000000000000000000000000000 XMM08=ffbc64ffffbc44ffffbc34ffffbc9f00 XMM09=00000000000000000000000000000000 XMM10=00000000000000000000000000000000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000 info registers vcpu 1 RAX=ffff88806cf35000 RBX=0000000000000001 RCX=ffffffff8450c50e RDX=ffffed100d9e6a01 RSI=0000000000000004 RDI=ffffffff812889a5 RBP=dffffc0000000000 RSP=ffff888008e27e70 R8 =0000000000000000 R9 =ffffed100d9e6a00 R10=ffff88806cf35003 R11=ffff888008c58400 R12=ffffffff85d3bed0 R13=1ffff110011c4fd3 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 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=00007ffe62cfe7c8 CR3=0000000015e82000 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=2035343a35353a3430203032206e754a XMM01=657463656e6e6f63736944203a5d3932 XMM02=302e303120746f6f722072657375206d XMM03=203a5d3932325b646873732072656c6c XMM04=69662068637573206f4e203a656c6163 XMM05=3a656c696620766e65206e65706f206f XMM06=65733a6468737328766e655f6d617020 XMM07=6b7a79732035343a35353a3430203032 XMM08=3d656e696c646d632022656369767265 XMM09=00000000000000000000000000000000 XMM10=00000000000000000000000000000000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000