syzkaller login: [ 30.704069] BUG: Bad rss-counter state mm:00000000a493ec82 type:MM_FILEPAGES val:33 [ 30.705262] BUG: Bad rss-counter state mm:00000000a493ec82 type:MM_ANONPAGES val:22 [ 30.745654] ================================================================== [ 30.746546] BUG: KASAN: slab-use-after-free in vma_interval_tree_remove+0xc75/0xec0 [ 30.747503] Read of size 8 at addr ffff88800f0f0140 by task sshd/221 [ 30.748495] [ 30.748734] CPU: 1 PID: 221 Comm: sshd Not tainted 6.4.0-rc7-next-20230620 #1 [ 30.749612] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS 1.12.0-1 04/01/2014 [ 30.750836] Call Trace: [ 30.751156] [ 30.751441] dump_stack_lvl+0x91/0xf0 [ 30.751952] print_report+0xcc/0x620 [ 30.752485] ? __virt_addr_valid+0x102/0x340 [ 30.753043] ? vma_interval_tree_remove+0xc75/0xec0 [ 30.753744] ? vma_interval_tree_remove+0xc75/0xec0 [ 30.754512] kasan_report+0xbe/0xf0 [ 30.755051] ? vma_interval_tree_remove+0xc75/0xec0 [ 30.755684] vma_interval_tree_remove+0xc75/0xec0 [ 30.756295] vma_prepare+0xc54/0x11a0 [ 30.756777] __split_vma+0x5af/0x950 [ 30.757265] ? __pfx___split_vma+0x10/0x10 [ 30.757799] ? find_held_lock+0x2c/0x110 [ 30.758315] do_vmi_align_munmap+0x2ba/0x11f0 [ 30.758879] ? lock_is_held_type+0x9f/0x120 [ 30.759413] ? __pfx_do_vmi_align_munmap+0x10/0x10 [ 30.760023] ? mtree_range_walk+0x632/0x900 [ 30.760576] ? mas_walk+0x5c7/0x7c0 [ 30.761053] do_vmi_munmap+0x1f1/0x2b0 [ 30.761557] mmap_region+0x1f9/0x2660 [ 30.762046] ? vm_mmap_pgoff+0x15c/0x3a0 [ 30.762566] ? __pfx_arch_get_unmapped_area_topdown+0x10/0x10 [ 30.763318] ? __pfx_lock_acquire+0x10/0x10 [ 30.763886] ? __pfx_mmap_region+0x10/0x10 [ 30.764443] ? security_mmap_addr+0x7d/0xa0 [ 30.765009] ? get_unmapped_area+0x1f5/0x3f0 [ 30.765620] do_mmap+0x854/0xf00 [ 30.766087] vm_mmap_pgoff+0x1a6/0x3a0 [ 30.766624] ? __pfx_vm_mmap_pgoff+0x10/0x10 [ 30.767213] ksys_mmap_pgoff+0x3af/0x500 [ 30.767766] do_syscall_64+0x3f/0x90 [ 30.768270] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 30.768953] RIP: 0033:0x7f1b06575d82 [ 30.769449] 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 [ 30.771755] RSP: 002b:00007fff6bfc0698 EFLAGS: 00000206 ORIG_RAX: 0000000000000009 [ 30.772726] RAX: ffffffffffffffda RBX: 0000000000000812 RCX: 00007f1b06575d82 [ 30.773665] RDX: 0000000000000005 RSI: 0000000000001000 RDI: 00007f1b059af000 [ 30.774568] RBP: 00007f1b059af000 R08: 0000000000000009 R09: 0000000000001000 [ 30.775475] R10: 0000000000000812 R11: 0000000000000206 R12: 0000563b3d9f3f60 [ 30.776392] R13: 00007fff6bfc06b0 R14: 00007fff6bfc06e0 R15: 00007fff6bfc0a40 [ 30.777306] [ 30.777619] [ 30.777848] Allocated by task 214: [ 30.778312] kasan_save_stack+0x22/0x50 [ 30.778853] kasan_set_track+0x25/0x30 [ 30.779382] __kasan_slab_alloc+0x59/0x70 [ 30.779939] kmem_cache_alloc+0x16b/0x370 [ 30.780487] vm_area_dup+0x20/0x160 [ 30.780975] __split_vma+0x170/0x950 [ 30.781494] split_vma+0xc6/0x110 [ 30.781960] mprotect_fixup+0x8d2/0xb30 [ 30.782494] do_mprotect_pkey+0x87e/0xd40 [ 30.783053] __x64_sys_mprotect+0x78/0xc0 [ 30.783609] do_syscall_64+0x3f/0x90 [ 30.784111] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 30.784800] [ 30.785029] Freed by task 214: [ 30.785461] kasan_save_stack+0x22/0x50 [ 30.785996] kasan_set_track+0x25/0x30 [ 30.786511] kasan_save_free_info+0x2b/0x50 [ 30.787084] __kasan_slab_free+0x10a/0x190 [ 30.787654] kmem_cache_free+0x10d/0x4d0 [ 30.788181] rcu_core+0x8c8/0x2860 [ 30.788657] __do_softirq+0x1b7/0x7d4 [ 30.789159] [ 30.789384] Last potentially related work creation: [ 30.790031] kasan_save_stack+0x22/0x50 [ 30.790556] __kasan_record_aux_stack+0x8e/0xa0 [ 30.791174] __call_rcu_common.constprop.0+0x6a/0xb90 [ 30.791868] remove_vma+0x139/0x170 [ 30.792352] do_vmi_align_munmap+0xd4a/0x11f0 [ 30.792953] do_vmi_munmap+0x1f1/0x2b0 [ 30.793476] __vm_munmap+0x138/0x3a0 [ 30.793981] __x64_sys_munmap+0x59/0x80 [ 30.794515] do_syscall_64+0x3f/0x90 [ 30.795026] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 30.795708] [ 30.795937] The buggy address belongs to the object at ffff88800f0f00e8 [ 30.795937] which belongs to the cache vm_area_struct of size 168 [ 30.797545] The buggy address is located 88 bytes inside of [ 30.797545] freed 168-byte region [ffff88800f0f00e8, ffff88800f0f0190) [ 30.799064] [ 30.799292] The buggy address belongs to the physical page: [ 30.800014] page:0000000057a56dad refcount:1 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0xf0f0 [ 30.801188] memcg:ffff88800a3ee701 [ 30.801641] flags: 0x100000000000200(slab|node=0|zone=1) [ 30.802317] page_type: 0xffffffff() [ 30.802785] raw: 0100000000000200 ffff8880087a0c80 dead000000000122 0000000000000000 [ 30.803753] raw: 0000000000000000 0000000000110011 00000001ffffffff ffff88800a3ee701 [ 30.804702] page dumped because: kasan: bad access detected [ 30.805404] [ 30.805630] Memory state around the buggy address: [ 30.806235] ffff88800f0f0000: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 [ 30.807133] ffff88800f0f0080: 00 00 00 00 00 fc fc fc fc fc fc fc fc fa fb fb [ 30.808039] >ffff88800f0f0100: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb [ 30.808939] ^ [ 30.809637] ffff88800f0f0180: fb fb fc fc fc fc fc fc fc fc fa fb fb fb fb fb [ 30.810547] ffff88800f0f0200: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fc [ 30.811430] ================================================================== [ 30.812698] Disabling lock debugging due to kernel taint [ 32.755659] BUG: Bad rss-counter state mm:000000008e950385 type:MM_FILEPAGES val:33 [ 32.757258] BUG: Bad rss-counter state mm:000000008e950385 type:MM_ANONPAGES val:22 [ 33.276820] BUG: Bad rss-counter state mm:00000000768a1826 type:MM_FILEPAGES val:33 [ 33.278403] BUG: Bad rss-counter state mm:00000000768a1826 type:MM_ANONPAGES val:22 Warning: Permanently added '[localhost]:21947' (ECDSA) to the list of known hosts. 2023/06/21 05:29:08 fuzzer started 2023/06/21 05:29:08 dialing manager at localhost:36067 2023/06/21 05:29:08 checking machine... 2023/06/21 05:29:08 checking revisions... [ 33.993167] kmemleak: Automatic memory scanning thread ended 2023/06/21 05:29:08 testing simple program... [ 34.038357] cgroup: Unknown subsys name 'net' [ 34.101866] cgroup: Unknown subsys name 'rlimit' executing program executing program executing program VM DIAGNOSIS: 05:29:08 Registers: info registers vcpu 0 RAX=ffffffff81809a91 RBX=0000000000000003 RCX=0000000000000000 RDX=0000000000000000 RSI=000000000000000a RDI=ffff888008d9faa0 RBP=dffffc0000000000 RSP=ffff888008d9f9f8 R8 =ffffffff860743f8 R9 =ffff888008d9f990 R10=0000000000038001 R11=0000000000000128 R12=000000000000000a R13=0000000000000000 R14=ffff888008d9fa88 R15=ffff88800ea62ac8 RIP=ffffffff813ad649 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 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=00007f957b5220b0 CR3=000000000eacc000 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=39323a3530203132206e754a3e36383c XMM01=7365733a646873732878696e755f6d61 XMM02=736f6c63206e6f6973736573203a296e XMM03=5f6d6170203a5d3033325b6468737320 XMM04=6456774875434142334f726f59427469 XMM05=485320415352203a3268737320323238 XMM06=206d6f726620746f6f7220726f662079 XMM07=00000000000000000000000000000000 XMM08=3a677562656420676f6c737973720000 XMM09=00000000000000000000000000000000 XMM10=00000000000000000000000000000000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000 info registers vcpu 1 RAX=ffffffff8180c6a2 RBX=0000000000000002 RCX=0000000000000002 RDX=ffff88806cf09b01 RSI=ffff88806cf09bc8 RDI=ffff88806cf09bc8 RBP=ffff88806cf09af0 RSP=ffff88806cf09a28 R8 =ffffffff860d825a R9 =ffff88806cf09ad8 R10=0000000000038001 R11=0000000000010b8d R12=ffff88806cf09af8 R13=ffff88806cf09ae0 R14=ffff88806cf09bd0 R15=ffff88806cf09a98 RIP=ffffffff81131041 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 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=00007f6a51158850 CR3=000000000c9c2000 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=1635cb444f9da3a9264fcb37e7456ebd XMM02=000000000011a3b8eff9b2d0a8fce9cb XMM03=000000000011a4882c67c8bc2e329bc3 XMM04=87f3bb8fa224a3cd00000000000ae988 XMM05=08266980159f34560000000000132c90 XMM06=c291bd5c70af25b90000000000131d30 XMM07=e042d86d42eb936e0000000000122020 XMM08=a0c0f98eaba8728c000000000011a488 XMM09=00000000000000000000000000000000 XMM10=20200000000020202020202020200000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000