syzkaller login: [ 30.160267] BUG: Bad rss-counter state mm:000000004b928532 type:MM_FILEPAGES val:33 [ 30.161707] BUG: Bad rss-counter state mm:000000004b928532 type:MM_ANONPAGES val:22 [ 30.325507] ================================================================== [ 30.326408] BUG: KASAN: slab-use-after-free in vma_interval_tree_remove+0xc75/0xec0 [ 30.327366] Read of size 8 at addr ffff88800d53e5c8 by task sshd/220 [ 30.328140] [ 30.328373] CPU: 0 PID: 220 Comm: sshd Not tainted 6.4.0-rc7-next-20230620 #1 [ 30.329349] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS 1.12.0-1 04/01/2014 [ 30.330329] Call Trace: [ 30.330650] [ 30.330932] dump_stack_lvl+0x91/0xf0 [ 30.331435] print_report+0xcc/0x620 [ 30.331923] ? __virt_addr_valid+0x102/0x340 [ 30.332491] ? vma_interval_tree_remove+0xc75/0xec0 [ 30.333107] ? vma_interval_tree_remove+0xc75/0xec0 [ 30.333720] kasan_report+0xbe/0xf0 [ 30.334200] ? vma_interval_tree_remove+0xc75/0xec0 [ 30.334810] vma_interval_tree_remove+0xc75/0xec0 [ 30.335409] vma_prepare+0xc54/0x11a0 [ 30.335884] __split_vma+0x5af/0x950 [ 30.336369] ? __pfx___split_vma+0x10/0x10 [ 30.336896] ? find_held_lock+0x2c/0x110 [ 30.337419] do_vmi_align_munmap+0x2ba/0x11f0 [ 30.337978] ? lock_is_held_type+0x9f/0x120 [ 30.338512] ? __pfx_do_vmi_align_munmap+0x10/0x10 [ 30.339114] ? mtree_range_walk+0x632/0x900 [ 30.339662] ? mas_walk+0x5c7/0x7c0 [ 30.340138] do_vmi_munmap+0x1f1/0x2b0 [ 30.340633] mmap_region+0x1f9/0x2660 [ 30.341118] ? vm_mmap_pgoff+0x15c/0x3a0 [ 30.341622] ? __pfx_arch_get_unmapped_area_topdown+0x10/0x10 [ 30.342330] ? __pfx_lock_acquire+0x10/0x10 [ 30.342853] ? __pfx_mmap_region+0x10/0x10 [ 30.343381] ? security_mmap_addr+0x7d/0xa0 [ 30.343910] ? get_unmapped_area+0x1f5/0x3f0 [ 30.344466] do_mmap+0x854/0xf00 [ 30.344898] vm_mmap_pgoff+0x1a6/0x3a0 [ 30.345386] ? __pfx_vm_mmap_pgoff+0x10/0x10 [ 30.345937] ksys_mmap_pgoff+0x3af/0x500 [ 30.346440] do_syscall_64+0x3f/0x90 [ 30.346917] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 30.347563] RIP: 0033:0x7f3cfa80ed82 [ 30.348012] 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 [ 30.350137] RSP: 002b:00007ffce53008f8 EFLAGS: 00000206 ORIG_RAX: 0000000000000009 [ 30.351031] RAX: ffffffffffffffda RBX: 0000000000000812 RCX: 00007f3cfa80ed82 [ 30.351864] RDX: 0000000000000005 RSI: 0000000000001000 RDI: 00007f3cf9c48000 [ 30.352717] RBP: 00007f3cf9c48000 R08: 0000000000000009 R09: 0000000000001000 [ 30.353548] R10: 0000000000000812 R11: 0000000000000206 R12: 00005564c00a3ec0 [ 30.354386] R13: 00007ffce5300910 R14: 00007ffce5300940 R15: 00007ffce5300ca0 [ 30.355235] [ 30.355523] [ 30.355739] Allocated by task 213: [ 30.356163] kasan_save_stack+0x22/0x50 [ 30.356668] kasan_set_track+0x25/0x30 [ 30.357165] __kasan_slab_alloc+0x59/0x70 [ 30.357694] kmem_cache_alloc+0x16b/0x370 [ 30.358207] vm_area_dup+0x20/0x160 [ 30.358656] __split_vma+0x170/0x950 [ 30.359120] split_vma+0xc6/0x110 [ 30.359561] mprotect_fixup+0x8d2/0xb30 [ 30.360059] do_mprotect_pkey+0x87e/0xd40 [ 30.360590] __x64_sys_mprotect+0x78/0xc0 [ 30.361104] do_syscall_64+0x3f/0x90 [ 30.361572] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 30.362209] [ 30.362421] Freed by task 213: [ 30.362806] kasan_save_stack+0x22/0x50 [ 30.363302] kasan_set_track+0x25/0x30 [ 30.363794] kasan_save_free_info+0x2b/0x50 [ 30.364334] __kasan_slab_free+0x10a/0x190 [ 30.364856] kmem_cache_free+0x10d/0x4d0 [ 30.365362] rcu_core+0x8c8/0x2860 [ 30.365797] __do_softirq+0x1b7/0x7d4 [ 30.366273] [ 30.366486] Last potentially related work creation: [ 30.367058] kasan_save_stack+0x22/0x50 [ 30.367555] __kasan_record_aux_stack+0x8e/0xa0 [ 30.368117] __call_rcu_common.constprop.0+0x6a/0xb90 [ 30.368761] remove_vma+0x139/0x170 [ 30.369203] do_vmi_align_munmap+0xd4a/0x11f0 [ 30.369748] do_vmi_munmap+0x1f1/0x2b0 [ 30.370225] __vm_munmap+0x138/0x3a0 [ 30.370684] __x64_sys_munmap+0x59/0x80 [ 30.371170] do_syscall_64+0x3f/0x90 [ 30.371638] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 30.372296] [ 30.372510] Second to last potentially related work creation: [ 30.373184] kasan_save_stack+0x22/0x50 [ 30.373678] __kasan_record_aux_stack+0x8e/0xa0 [ 30.374243] __call_rcu_common.constprop.0+0x6a/0xb90 [ 30.374872] remove_vma+0x139/0x170 [ 30.375316] do_vmi_align_munmap+0xd4a/0x11f0 [ 30.375864] do_vmi_munmap+0x1f1/0x2b0 [ 30.376357] mmap_region+0x1f9/0x2660 [ 30.376833] do_mmap+0x854/0xf00 [ 30.377259] vm_mmap_pgoff+0x1a6/0x3a0 [ 30.377743] ksys_mmap_pgoff+0x3af/0x500 [ 30.378234] do_syscall_64+0x3f/0x90 [ 30.378699] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 30.379332] [ 30.379545] The buggy address belongs to the object at ffff88800d53e570 [ 30.379545] which belongs to the cache vm_area_struct of size 168 [ 30.381008] The buggy address is located 88 bytes inside of [ 30.381008] freed 168-byte region [ffff88800d53e570, ffff88800d53e618) [ 30.382385] [ 30.382597] The buggy address belongs to the physical page: [ 30.383244] page:000000002af54828 refcount:1 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0xd53e [ 30.384318] memcg:ffff88800f444b01 [ 30.384738] anon flags: 0x100000000000200(slab|node=0|zone=1) [ 30.385434] page_type: 0xffffffff() [ 30.385885] raw: 0100000000000200 ffff8880087a0c80 ffffea00003adec0 dead000000000003 [ 30.386793] raw: 0000000000000000 0000000000110011 00000001ffffffff ffff88800f444b01 [ 30.387696] page dumped because: kasan: bad access detected [ 30.388363] [ 30.388573] Memory state around the buggy address: [ 30.389145] ffff88800d53e480: fc 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 [ 30.389995] ffff88800d53e500: 00 00 00 00 00 00 fc fc fc fc fc fc fc fc fa fb [ 30.390839] >ffff88800d53e580: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb [ 30.391671] ^ [ 30.392344] ffff88800d53e600: fb fb fb fc fc fc fc fc fc fc fc 00 00 00 00 00 [ 30.393191] ffff88800d53e680: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 [ 30.394033] ================================================================== [ 30.395075] Disabling lock debugging due to kernel taint [ 32.258460] BUG: Bad rss-counter state mm:000000003ce5ca83 type:MM_FILEPAGES val:33 [ 32.259541] BUG: Bad rss-counter state mm:000000003ce5ca83 type:MM_ANONPAGES val:22 [ 32.726542] BUG: Bad rss-counter state mm:00000000b2d66ab1 type:MM_FILEPAGES val:33 [ 32.727791] BUG: Bad rss-counter state mm:00000000b2d66ab1 type:MM_ANONPAGES val:22 Warning: Permanently added '[localhost]:48644' (ECDSA) to the list of known hosts. 2023/06/21 06:51:47 fuzzer started 2023/06/21 06:51:47 dialing manager at localhost:36067 2023/06/21 06:51:47 checking machine... 2023/06/21 06:51:47 checking revisions... [ 33.451505] kmemleak: Automatic memory scanning thread ended 2023/06/21 06:51:47 testing simple program... [ 33.492984] cgroup: Unknown subsys name 'net' [ 33.551851] cgroup: Unknown subsys name 'rlimit' executing program executing program executing program VM DIAGNOSIS: 06:51:47 Registers: info registers vcpu 0 RAX=0000000000000000 RBX=0000000000000001 RCX=ffff888016517928 RDX=1ffff11002ca2f11 RSI=1ffff11002ca2f13 RDI=ffff888016517888 RBP=dffffc0000000000 RSP=ffff8880165177c8 R8 =0000000000000000 R9 =0000000000000000 R10=ffff888016517888 R11=ffffffff81806f71 R12=ffffed1002ca2f13 R13=ffffed1002ca2f12 R14=ffff8880165178d0 R15=ffff888016517888 RIP=ffffffff8113060b 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 00007feb735db900 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=00007feb73b930b0 CR3=0000000018058000 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=25252525252525252525252525252525 XMM01=000000000000000000000000000000ff XMM02=000000000000000000000000000000ff XMM03=5320444f4854454d5f54505952434e45 XMM04=40404040404040404040404040404040 XMM05=5a5a5a5a5a5a5a5a5a5a5a5a5a5a5a5a XMM06=20202020202020202020202020202020 XMM07=00000000000000000000000000000000 XMM08=662079726f6d656d20666f2074756f00 XMM09=00000000000000000000000000000000 XMM10=00000000000000000000000000000000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000 info registers vcpu 1 RAX=0000000000000000 RBX=0000000000000003 RCX=ffffffff811431b8 RDX=ffff888008d951c0 RSI=0000000000000100 RDI=0000000000000006 RBP=000000001bb5a080 RSP=ffff88806cf09d78 R8 =0000000000000006 R9 =0000000000000003 R10=0000000000080000 R11=0000000000000000 R12=0000000000000000 R13=0000000000080000 R14=ffffffff813782f8 R15=ffff88800d58eb00 RIP=ffffffff814c0272 RFL=00000206 [-----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 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=00007f8a1ac1eb90 CR3=0000000016b70000 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=2036343a31353a3630203132206e754a XMM01=73732878696e755f6d6170203a5d3932 XMM02=65736f6c63206e6f6973736573203a29 XMM03=755f6d6170203a5d3932325b64687373 XMM04=69662068637573206f4e203a656c6163 XMM05=3a656c696620766e65206e65706f206f XMM06=65733a6468737328766e655f6d617020 XMM07=6b7a79732036343a31353a3630203132 XMM08=3d656e696c646d632022656369767265 XMM09=00000000000000000000000000000000 XMM10=00000000000000000000000000000000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000