syzkaller login: [ 33.092436] BUG: Bad rss-counter state mm:000000001a6c1e8a type:MM_FILEPAGES val:33 [ 33.094168] BUG: Bad rss-counter state mm:000000001a6c1e8a type:MM_ANONPAGES val:22 [ 33.255725] ================================================================== [ 33.256675] BUG: KASAN: slab-use-after-free in vma_interval_tree_remove+0xc75/0xec0 [ 33.257683] Read of size 8 at addr ffff8880095646b0 by task sshd/219 [ 33.258443] [ 33.258762] CPU: 0 PID: 219 Comm: sshd Not tainted 6.4.0-rc7-next-20230619 #1 [ 33.259611] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS 1.12.0-1 04/01/2014 [ 33.260592] Call Trace: [ 33.260931] [ 33.261216] dump_stack_lvl+0x91/0xf0 [ 33.261699] print_report+0xcc/0x620 [ 33.262177] ? __virt_addr_valid+0x102/0x340 [ 33.262722] ? vma_interval_tree_remove+0xc75/0xec0 [ 33.263346] ? vma_interval_tree_remove+0xc75/0xec0 [ 33.263959] kasan_report+0xbe/0xf0 [ 33.264443] ? vma_interval_tree_remove+0xc75/0xec0 [ 33.265059] vma_interval_tree_remove+0xc75/0xec0 [ 33.265665] vma_prepare+0xc54/0x11a0 [ 33.266150] __split_vma+0x5af/0x950 [ 33.266617] ? __pfx___split_vma+0x10/0x10 [ 33.267141] ? find_held_lock+0x2c/0x110 [ 33.267656] do_vmi_align_munmap+0x2ba/0x11f0 [ 33.268221] ? lock_is_held_type+0x9f/0x120 [ 33.268771] ? __pfx_do_vmi_align_munmap+0x10/0x10 [ 33.269369] ? mtree_range_walk+0x632/0x900 [ 33.269914] ? mas_walk+0x5c7/0x7c0 [ 33.270386] do_vmi_munmap+0x1f1/0x2b0 [ 33.270873] mmap_region+0x1f9/0x2660 [ 33.271360] ? vm_mmap_pgoff+0x15c/0x3a0 [ 33.271877] ? __pfx_arch_get_unmapped_area_topdown+0x10/0x10 [ 33.272617] ? __pfx_lock_acquire+0x10/0x10 [ 33.273154] ? __pfx_mmap_region+0x10/0x10 [ 33.273678] ? security_mmap_addr+0x7d/0xa0 [ 33.274205] ? get_unmapped_area+0x1f5/0x3f0 [ 33.274750] do_mmap+0x854/0xf00 [ 33.275198] vm_mmap_pgoff+0x1a6/0x3a0 [ 33.275687] ? __pfx_vm_mmap_pgoff+0x10/0x10 [ 33.276263] ksys_mmap_pgoff+0x3af/0x500 [ 33.276840] do_syscall_64+0x3f/0x90 [ 33.277410] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 33.278188] RIP: 0033:0x7f7bc3498d82 [ 33.278733] 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 [ 33.281316] RSP: 002b:00007ffcab5cbba8 EFLAGS: 00000206 ORIG_RAX: 0000000000000009 [ 33.282415] RAX: ffffffffffffffda RBX: 0000000000000812 RCX: 00007f7bc3498d82 [ 33.283436] RDX: 0000000000000005 RSI: 0000000000001000 RDI: 00007f7bc28d2000 [ 33.284503] RBP: 00007f7bc28d2000 R08: 0000000000000009 R09: 0000000000001000 [ 33.285531] R10: 0000000000000812 R11: 0000000000000206 R12: 0000560513146f70 [ 33.286552] R13: 00007ffcab5cbbc0 R14: 00007ffcab5cbbf0 R15: 00007ffcab5cbf50 [ 33.287593] [ 33.287948] [ 33.288211] Allocated by task 212: [ 33.288751] kasan_save_stack+0x22/0x50 [ 33.289367] kasan_set_track+0x25/0x30 [ 33.289966] __kasan_slab_alloc+0x59/0x70 [ 33.290603] kmem_cache_alloc+0x16b/0x370 [ 33.291234] vm_area_dup+0x20/0x160 [ 33.291784] __split_vma+0x170/0x950 [ 33.292354] split_vma+0xc6/0x110 [ 33.292884] mprotect_fixup+0x8d2/0xb30 [ 33.293493] do_mprotect_pkey+0x87e/0xd40 [ 33.294125] __x64_sys_mprotect+0x78/0xc0 [ 33.294763] do_syscall_64+0x3f/0x90 [ 33.295338] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 33.296117] [ 33.296395] Freed by task 212: [ 33.296866] kasan_save_stack+0x22/0x50 [ 33.297483] kasan_set_track+0x25/0x30 [ 33.298082] kasan_save_free_info+0x2b/0x50 [ 33.298731] __kasan_slab_free+0x10a/0x190 [ 33.299377] kmem_cache_free+0x10d/0x4d0 [ 33.299991] rcu_core+0x8c8/0x2860 [ 33.300534] __do_softirq+0x1b7/0x7d4 [ 33.301110] [ 33.301371] Last potentially related work creation: [ 33.302080] kasan_save_stack+0x22/0x50 [ 33.302688] __kasan_record_aux_stack+0x8e/0xa0 [ 33.303380] __call_rcu_common.constprop.0+0x6a/0xb90 [ 33.304161] remove_vma+0x139/0x170 [ 33.304716] do_vmi_align_munmap+0xd4a/0x11f0 [ 33.305394] do_vmi_munmap+0x1f1/0x2b0 [ 33.305976] __vm_munmap+0x138/0x3a0 [ 33.306541] __x64_sys_munmap+0x59/0x80 [ 33.307143] do_syscall_64+0x3f/0x90 [ 33.307712] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 33.308511] [ 33.308772] The buggy address belongs to the object at ffff888009564658 [ 33.308772] which belongs to the cache vm_area_struct of size 168 [ 33.310553] The buggy address is located 88 bytes inside of [ 33.310553] freed 168-byte region [ffff888009564658, ffff888009564700) [ 33.312265] [ 33.312527] The buggy address belongs to the physical page: [ 33.313325] page:00000000ddda7802 refcount:1 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0x9564 [ 33.314639] memcg:ffff8880095c0201 [ 33.315160] flags: 0x100000000000200(slab|node=0|zone=1) [ 33.315940] page_type: 0xffffffff() [ 33.316506] raw: 0100000000000200 ffff88800879fc80 dead000000000100 dead000000000122 [ 33.317617] raw: 0000000000000000 0000000000110011 00000001ffffffff ffff8880095c0201 [ 33.318711] page dumped because: kasan: bad access detected [ 33.319512] [ 33.319770] Memory state around the buggy address: [ 33.320482] ffff888009564580: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 [ 33.321516] ffff888009564600: 00 00 00 fc fc fc fc fc fc fc fc fa fb fb fb fb [ 33.322540] >ffff888009564680: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb [ 33.323560] ^ [ 33.324273] ffff888009564700: fc fc fc fc fc fc fc fc 00 00 00 00 00 00 00 00 [ 33.325297] ffff888009564780: 00 00 00 00 00 00 00 00 00 00 00 00 00 fc fc fc [ 33.326309] ================================================================== [ 33.327618] Disabling lock debugging due to kernel taint [ 35.497800] BUG: Bad rss-counter state mm:00000000b2ce4273 type:MM_FILEPAGES val:33 [ 35.498990] BUG: Bad rss-counter state mm:00000000b2ce4273 type:MM_ANONPAGES val:22 [ 35.917080] BUG: Bad rss-counter state mm:0000000094d7bc48 type:MM_FILEPAGES val:33 [ 35.918145] BUG: Bad rss-counter state mm:0000000094d7bc48 type:MM_ANONPAGES val:22 Warning: Permanently added '[localhost]:50736' (ECDSA) to the list of known hosts. 2023/06/19 19:05:31 fuzzer started 2023/06/19 19:05:31 dialing manager at localhost:44161 2023/06/19 19:05:31 checking machine... 2023/06/19 19:05:31 checking revisions... [ 36.716862] kmemleak: Automatic memory scanning thread ended 2023/06/19 19:05:31 testing simple program... [ 36.768649] cgroup: Unknown subsys name 'net' [ 36.808719] cgroup: Unknown subsys name 'rlimit' executing program executing program executing program VM DIAGNOSIS: 19:05:21 Registers: info registers vcpu 0 RAX=0000000000020d8a RBX=0000000000000002 RCX=ffffffff8180c521 RDX=0000000000020d9b RSI=00000000000080c5 RDI=00000000000628d1 RBP=ffff88806ce09af0 RSP=ffff88806ce09a28 R8 =ffffffff86137508 R9 =ffff88806ce09ad8 R10=0000000000038001 R11=0000000000020d8a R12=ffff88806ce09af8 R13=ffff88806ce09ae0 R14=ffff88806ce09ad9 R15=ffff88806ce09a98 RIP=ffffffff81130859 RFL=00000287 [--S--PC] 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 00007fa014897900 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=000055ab36dca954 CR3=000000000f15a000 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=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=00007f743871c7c0 CR3=000000000d498000 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=2030333a35303a3931203931206e754a XMM01=73732878696e755f6d6170203a5d3832 XMM02=65736f6c63206e6f6973736573203a29 XMM03=755f6d6170203a5d3832325b64687373 XMM04=69662068637573206f4e203a656c6163 XMM05=3a656c696620766e65206e65706f206f XMM06=65733a6468737328766e655f6d617020 XMM07=6b7a79732030333a35303a3931203931 XMM08=3d656e696c646d632022656369767265 XMM09=00000000000000000000000000000000 XMM10=00000000000000000000000000000000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000