syzkaller login: [ 28.694325] BUG: Bad rss-counter state mm:000000001b2ab4af type:MM_FILEPAGES val:33 [ 28.696023] BUG: Bad rss-counter state mm:000000001b2ab4af type:MM_ANONPAGES val:22 [ 28.857137] ================================================================== [ 28.858321] BUG: KASAN: slab-use-after-free in vma_interval_tree_remove+0xc75/0xec0 [ 28.859782] Read of size 8 at addr ffff88800ebc3d08 by task sshd/220 [ 28.860859] [ 28.861160] CPU: 1 PID: 220 Comm: sshd Not tainted 6.4.0-rc7-next-20230620 #1 [ 28.862385] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS 1.12.0-1 04/01/2014 [ 28.863781] Call Trace: [ 28.864229] <TASK> [ 28.864624] dump_stack_lvl+0x91/0xf0 [ 28.865306] print_report+0xcc/0x620 [ 28.865976] ? __virt_addr_valid+0x102/0x340 [ 28.866746] ? vma_interval_tree_remove+0xc75/0xec0 [ 28.867623] ? vma_interval_tree_remove+0xc75/0xec0 [ 28.868480] kasan_report+0xbe/0xf0 [ 28.869142] ? vma_interval_tree_remove+0xc75/0xec0 [ 28.870011] vma_interval_tree_remove+0xc75/0xec0 [ 28.870852] vma_prepare+0xc54/0x11a0 [ 28.871536] __split_vma+0x5af/0x950 [ 28.872196] ? __pfx___split_vma+0x10/0x10 [ 28.872936] ? find_held_lock+0x2c/0x110 [ 28.873663] do_vmi_align_munmap+0x2ba/0x11f0 [ 28.874449] ? lock_is_held_type+0x9f/0x120 [ 28.875204] ? __pfx_do_vmi_align_munmap+0x10/0x10 [ 28.876080] ? mtree_range_walk+0x632/0x900 [ 28.876854] ? mas_walk+0x5c7/0x7c0 [ 28.877517] do_vmi_munmap+0x1f1/0x2b0 [ 28.878203] mmap_region+0x1f9/0x2660 [ 28.878883] ? vm_mmap_pgoff+0x15c/0x3a0 [ 28.879608] ? __pfx_arch_get_unmapped_area_topdown+0x10/0x10 [ 28.880619] ? __pfx_lock_acquire+0x10/0x10 [ 28.881366] ? __pfx_mmap_region+0x10/0x10 [ 28.882107] ? security_mmap_addr+0x7d/0xa0 [ 28.882850] ? get_unmapped_area+0x1f5/0x3f0 [ 28.883647] do_mmap+0x854/0xf00 [ 28.884262] vm_mmap_pgoff+0x1a6/0x3a0 [ 28.884957] ? __pfx_vm_mmap_pgoff+0x10/0x10 [ 28.885741] ksys_mmap_pgoff+0x3af/0x500 [ 28.886456] do_syscall_64+0x3f/0x90 [ 28.887128] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 28.888048] RIP: 0033:0x7f3f1190fd82 [ 28.888691] 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 [ 28.891707] RSP: 002b:00007ffeaff68c18 EFLAGS: 00000206 ORIG_RAX: 0000000000000009 [ 28.892983] RAX: ffffffffffffffda RBX: 0000000000000812 RCX: 00007f3f1190fd82 [ 28.894175] RDX: 0000000000000005 RSI: 0000000000001000 RDI: 00007f3f10d49000 [ 28.895399] RBP: 00007f3f10d49000 R08: 0000000000000009 R09: 0000000000001000 [ 28.896586] R10: 0000000000000812 R11: 0000000000000206 R12: 0000561e05561d90 [ 28.897773] R13: 00007ffeaff68c30 R14: 00007ffeaff68c60 R15: 00007ffeaff68fc0 [ 28.898977] </TASK> [ 28.899401] [ 28.899700] Allocated by task 213: [ 28.900300] kasan_save_stack+0x22/0x50 [ 28.901118] kasan_set_track+0x25/0x30 [ 28.901810] __kasan_slab_alloc+0x59/0x70 [ 28.902540] kmem_cache_alloc+0x16b/0x370 [ 28.903262] vm_area_dup+0x20/0x160 [ 28.903931] __split_vma+0x170/0x950 [ 28.904580] split_vma+0xc6/0x110 [ 28.905186] mprotect_fixup+0x8d2/0xb30 [ 28.905887] do_mprotect_pkey+0x87e/0xd40 [ 28.906614] __x64_sys_mprotect+0x78/0xc0 [ 28.907355] do_syscall_64+0x3f/0x90 [ 28.908016] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 28.908915] [ 28.909212] Freed by task 213: [ 28.909759] kasan_save_stack+0x22/0x50 [ 28.910459] kasan_set_track+0x25/0x30 [ 28.911132] kasan_save_free_info+0x2b/0x50 [ 28.911866] __kasan_slab_free+0x10a/0x190 [ 28.912462] kmem_cache_free+0x10d/0x4d0 [ 28.913029] rcu_core+0x8c8/0x2860 [ 28.913518] __do_softirq+0x1b7/0x7d4 [ 28.914033] [ 28.914267] Last potentially related work creation: [ 28.914923] kasan_save_stack+0x22/0x50 [ 28.915495] __kasan_record_aux_stack+0x8e/0xa0 [ 28.916046] __call_rcu_common.constprop.0+0x6a/0xb90 [ 28.916656] remove_vma+0x139/0x170 [ 28.917084] do_vmi_align_munmap+0xd4a/0x11f0 [ 28.917611] do_vmi_munmap+0x1f1/0x2b0 [ 28.918067] __vm_munmap+0x138/0x3a0 [ 28.918509] __x64_sys_munmap+0x59/0x80 [ 28.918982] do_syscall_64+0x3f/0x90 [ 28.919445] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 28.920055] [ 28.920262] Second to last potentially related work creation: [ 28.920909] kasan_save_stack+0x22/0x50 [ 28.921387] __kasan_record_aux_stack+0x8e/0xa0 [ 28.921928] __call_rcu_common.constprop.0+0x6a/0xb90 [ 28.922533] remove_vma+0x139/0x170 [ 28.922957] do_vmi_align_munmap+0xd4a/0x11f0 [ 28.923501] do_vmi_munmap+0x1f1/0x2b0 [ 28.923959] mmap_region+0x1f9/0x2660 [ 28.924412] do_mmap+0x854/0xf00 [ 28.924819] vm_mmap_pgoff+0x1a6/0x3a0 [ 28.925280] ksys_mmap_pgoff+0x3af/0x500 [ 28.925770] do_syscall_64+0x3f/0x90 [ 28.926245] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 28.926884] [ 28.927103] The buggy address belongs to the object at ffff88800ebc3cb0 [ 28.927103] which belongs to the cache vm_area_struct of size 168 [ 28.928629] The buggy address is located 88 bytes inside of [ 28.928629] freed 168-byte region [ffff88800ebc3cb0, ffff88800ebc3d58) [ 28.930038] [ 28.930259] The buggy address belongs to the physical page: [ 28.930932] page:00000000c326dce5 refcount:1 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0xebc3 [ 28.932058] memcg:ffff88800bec9001 [ 28.932496] anon flags: 0x100000000000200(slab|node=0|zone=1) [ 28.933189] page_type: 0xffffffff() [ 28.933661] raw: 0100000000000200 ffff8880087a0c80 ffffea00003a88c0 dead000000000003 [ 28.934601] raw: 0000000000000000 0000000000110011 00000001ffffffff ffff88800bec9001 [ 28.935536] page dumped because: kasan: bad access detected [ 28.936198] [ 28.936420] Memory state around the buggy address: [ 28.937002] ffff88800ebc3c00: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fc fc [ 28.937865] ffff88800ebc3c80: fc fc fc fc fc fc fa fb fb fb fb fb fb fb fb fb [ 28.938728] >ffff88800ebc3d00: fb fb fb fb fb fb fb fb fb fb fb fc fc fc fc fc [ 28.939600] ^ [ 28.940042] ffff88800ebc3d80: fc fc fc fa fb fb fb fb fb fb fb fb fb fb fb fb [ 28.940910] ffff88800ebc3e00: fb fb fb fb fb fb fb fb fc fc fc fc fc fc fc fc [ 28.941759] ================================================================== [ 28.942789] Disabling lock debugging due to kernel taint [ 31.594479] BUG: Bad rss-counter state mm:000000002c588f19 type:MM_FILEPAGES val:33 [ 31.595437] BUG: Bad rss-counter state mm:000000002c588f19 type:MM_ANONPAGES val:22 [ 32.064441] BUG: Bad rss-counter state mm:00000000a6a2fc25 type:MM_FILEPAGES val:33 [ 32.065436] BUG: Bad rss-counter state mm:00000000a6a2fc25 type:MM_ANONPAGES val:22 Warning: Permanently added '[localhost]:7209' (ECDSA) to the list of known hosts. 2023/06/21 00:42:59 fuzzer started 2023/06/21 00:42:59 dialing manager at localhost:36067 2023/06/21 00:42:59 checking machine... 2023/06/21 00:42:59 checking revisions... [ 32.798216] kmemleak: Automatic memory scanning thread ended 2023/06/21 00:43:00 testing simple program... [ 32.845869] cgroup: Unknown subsys name 'net' [ 32.903853] cgroup: Unknown subsys name 'rlimit' executing program executing program executing program VM DIAGNOSIS: 00:42:59 Registers: info registers vcpu 0 RAX=0000000080000000 RBX=0000000000000001 RCX=ffffffff83723e1a RDX=ffff888019e451c0 RSI=0000000000000000 RDI=0000000000000004 RBP=0000000000000002 RSP=ffff88800f50f7b8 R8 =0000000000000004 R9 =0000000000000002 R10=0000000000000001 R11=00000000000b6a61 R12=0000000000000002 R13=ffffffff87f99ae8 R14=ffff8880167f3579 R15=0000000000000006 RIP=ffffffff814c086b RFL=00000202 [-------] 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 00007f287cfdb900 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=00007f287d592618 CR3=000000000f5dc000 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=6e69676f6c5f6d61702c78756e696c65 XMM02=755f6d61702c74696d7265705f6d6170 XMM03=2c766e655f6d61702c7374696d696c5f XMM04=6d61702c766e655f6d61702c7374696d XMM05=78696e755f6d61702c74696d7265705f XMM06=6469756e69676f6c5f6d61702c78756e XMM07=672065736f6c635f6e6f69737365733a 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=0000000000000001 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=00007f28cb9b4268 CR3=000000000c5be000 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=ce333b5175b611a3b4433770fb9b32bb XMM02=000000000011a960eff9b2d0a8fce9cb XMM03=000000000011aa302c67c8bc2e329bc3 XMM04=c6057d5de21b16d700000000000ae988 XMM05=19e9129bd510f2350000000000133088 XMM06=4fda316b135da52b0000000000132f10 XMM07=e042d86d42eb936e0000000000122128 XMM08=8af3b26306ce0698000000000011aa30 XMM09=00000000000000000000000000000000 XMM10=00000000000000000000000000000000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000