syzkaller login: [ 38.737339] BUG: Bad rss-counter state mm:000000002940efd5 type:MM_FILEPAGES val:33 [ 38.738559] BUG: Bad rss-counter state mm:000000002940efd5 type:MM_ANONPAGES val:22 [ 38.903873] ================================================================== [ 38.904959] BUG: KASAN: slab-use-after-free in vma_interval_tree_remove+0xc75/0xec0 [ 38.906196] Read of size 8 at addr ffff888016c4cc20 by task sshd/220 [ 38.907147] [ 38.907408] CPU: 1 PID: 220 Comm: sshd Not tainted 6.4.0-rc7-next-20230620 #1 [ 38.908422] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS 1.12.0-1 04/01/2014 [ 38.909579] Call Trace: [ 38.909988] [ 38.910325] dump_stack_lvl+0x91/0xf0 [ 38.910846] print_report+0xcc/0x620 [ 38.911324] ? __virt_addr_valid+0x102/0x340 [ 38.911871] ? vma_interval_tree_remove+0xc75/0xec0 [ 38.912488] ? vma_interval_tree_remove+0xc75/0xec0 [ 38.913100] kasan_report+0xbe/0xf0 [ 38.913573] ? vma_interval_tree_remove+0xc75/0xec0 [ 38.914200] vma_interval_tree_remove+0xc75/0xec0 [ 38.914798] vma_prepare+0xc54/0x11a0 [ 38.915278] __split_vma+0x5af/0x950 [ 38.915748] ? __pfx___split_vma+0x10/0x10 [ 38.916267] ? find_held_lock+0x2c/0x110 [ 38.916783] do_vmi_align_munmap+0x2ba/0x11f0 [ 38.917342] ? lock_is_held_type+0x9f/0x120 [ 38.917889] ? __pfx_do_vmi_align_munmap+0x10/0x10 [ 38.918500] ? mtree_range_walk+0x632/0x900 [ 38.919045] ? mas_walk+0x5c7/0x7c0 [ 38.919519] do_vmi_munmap+0x1f1/0x2b0 [ 38.920009] mmap_region+0x1f9/0x2660 [ 38.920491] ? vm_mmap_pgoff+0x15c/0x3a0 [ 38.921000] ? __pfx_arch_get_unmapped_area_topdown+0x10/0x10 [ 38.921703] ? __pfx_lock_acquire+0x10/0x10 [ 38.922251] ? __pfx_mmap_region+0x10/0x10 [ 38.922783] ? security_mmap_addr+0x7d/0xa0 [ 38.923311] ? get_unmapped_area+0x1f5/0x3f0 [ 38.923861] do_mmap+0x854/0xf00 [ 38.924300] vm_mmap_pgoff+0x1a6/0x3a0 [ 38.924793] ? __pfx_vm_mmap_pgoff+0x10/0x10 [ 38.925356] ksys_mmap_pgoff+0x3af/0x500 [ 38.925871] do_syscall_64+0x3f/0x90 [ 38.926349] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 38.926992] RIP: 0033:0x7fb6426bed82 [ 38.927451] 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 [ 38.929551] RSP: 002b:00007ffdf47016f8 EFLAGS: 00000206 ORIG_RAX: 0000000000000009 [ 38.930469] RAX: ffffffffffffffda RBX: 0000000000000812 RCX: 00007fb6426bed82 [ 38.931315] RDX: 0000000000000005 RSI: 0000000000001000 RDI: 00007fb641af8000 [ 38.932157] RBP: 00007fb641af8000 R08: 0000000000000009 R09: 0000000000001000 [ 38.933002] R10: 0000000000000812 R11: 0000000000000206 R12: 000055df3e01bec0 [ 38.933852] R13: 00007ffdf4701710 R14: 00007ffdf4701740 R15: 00007ffdf4701aa0 [ 38.934709] [ 38.935003] [ 38.935219] Allocated by task 213: [ 38.935650] kasan_save_stack+0x22/0x50 [ 38.936157] kasan_set_track+0x25/0x30 [ 38.936656] __kasan_slab_alloc+0x59/0x70 [ 38.937178] kmem_cache_alloc+0x16b/0x370 [ 38.937700] vm_area_dup+0x20/0x160 [ 38.938182] __split_vma+0x170/0x950 [ 38.938649] split_vma+0xc6/0x110 [ 38.939091] mprotect_fixup+0x8d2/0xb30 [ 38.939594] do_mprotect_pkey+0x87e/0xd40 [ 38.940119] __x64_sys_mprotect+0x78/0xc0 [ 38.940643] do_syscall_64+0x3f/0x90 [ 38.941118] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 38.941761] [ 38.941984] Freed by task 213: [ 38.942387] kasan_save_stack+0x22/0x50 [ 38.942892] kasan_set_track+0x25/0x30 [ 38.943382] kasan_save_free_info+0x2b/0x50 [ 38.943908] __kasan_slab_free+0x10a/0x190 [ 38.944436] kmem_cache_free+0x10d/0x4d0 [ 38.944942] rcu_core+0x8c8/0x2860 [ 38.945386] __do_softirq+0x1b7/0x7d4 [ 38.945875] [ 38.946090] Last potentially related work creation: [ 38.946674] kasan_save_stack+0x22/0x50 [ 38.947175] __kasan_record_aux_stack+0x8e/0xa0 [ 38.947749] __call_rcu_common.constprop.0+0x6a/0xb90 [ 38.948520] remove_vma+0x139/0x170 [ 38.948971] do_vmi_align_munmap+0xd4a/0x11f0 [ 38.949526] do_vmi_munmap+0x1f1/0x2b0 [ 38.950018] __vm_munmap+0x138/0x3a0 [ 38.950486] __x64_sys_munmap+0x59/0x80 [ 38.950993] do_syscall_64+0x3f/0x90 [ 38.951475] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 38.952113] [ 38.952328] The buggy address belongs to the object at ffff888016c4cbc8 [ 38.952328] which belongs to the cache vm_area_struct of size 168 [ 38.953806] The buggy address is located 88 bytes inside of [ 38.953806] freed 168-byte region [ffff888016c4cbc8, ffff888016c4cc70) [ 38.955212] [ 38.955427] The buggy address belongs to the physical page: [ 38.956085] page:00000000638bfd93 refcount:1 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0x16c4c [ 38.957189] memcg:ffff888016f2f701 [ 38.957626] flags: 0x100000000000200(slab|node=0|zone=1) [ 38.958292] page_type: 0xffffffff() [ 38.958739] raw: 0100000000000200 ffff8880087a0c80 ffffea0000380d80 dead000000000008 [ 38.959649] raw: 0000000000000000 0000000000110011 00000001ffffffff ffff888016f2f701 [ 38.960548] page dumped because: kasan: bad access detected [ 38.961211] [ 38.961430] Memory state around the buggy address: [ 38.962021] ffff888016c4cb00: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb [ 38.962881] ffff888016c4cb80: fb fc fc fc fc fc fc fc fc fa fb fb fb fb fb fb [ 38.963725] >ffff888016c4cc00: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fc fc [ 38.964580] ^ [ 38.965108] ffff888016c4cc80: fc fc fc fc fc fc fa fb fb fb fb fb fb fb fb fb [ 38.965969] ffff888016c4cd00: fb fb fb fb fb fb fb fb fb fb fb fc fc fc fc fc [ 38.966822] ================================================================== [ 38.967781] Disabling lock debugging due to kernel taint [ 40.804637] BUG: Bad rss-counter state mm:000000006bd1ec2e type:MM_FILEPAGES val:33 [ 40.805622] BUG: Bad rss-counter state mm:000000006bd1ec2e type:MM_ANONPAGES val:22 [ 41.204411] BUG: Bad rss-counter state mm:000000008043f39a type:MM_FILEPAGES val:33 [ 41.205390] BUG: Bad rss-counter state mm:000000008043f39a type:MM_ANONPAGES val:22 Warning: Permanently added '[localhost]:29751' (ECDSA) to the list of known hosts. 2023/06/20 12:43:09 fuzzer started 2023/06/20 12:43:10 dialing manager at localhost:36067 2023/06/20 12:43:10 checking machine... 2023/06/20 12:43:10 checking revisions... [ 41.907483] kmemleak: Automatic memory scanning thread ended 2023/06/20 12:43:10 testing simple program... [ 41.950759] cgroup: Unknown subsys name 'net' [ 42.046634] cgroup: Unknown subsys name 'rlimit' executing program executing program executing program VM DIAGNOSIS: 12:43:09 Registers: info registers vcpu 0 RAX=dffffc0000000000 RBX=ffffffff813ad470 RCX=ffffffff860d8201 RDX=1ffff11002dc1f61 RSI=ffffffff81846194 RDI=ffff888016e0fb78 RBP=ffff888016e0fb48 RSP=ffff888016e0faa8 R8 =ffffffff860d825a R9 =ffff888016e0faf0 R10=0000000000038001 R11=0000000000010b8d R12=ffff888016e0fb78 R13=0000000000000000 R14=ffff8880193a51c0 R15=ffff888019803720 RIP=ffffffff813ad47e RFL=00000282 [--S----] 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 00007f7337931900 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=00007ffe14249ff8 CR3=000000000eb6c000 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=1ffffffff0c114ab RBX=0000000000000002 RCX=ffffffff8608a556 RDX=0000000000000000 RSI=dffffc0000000000 RDI=ffff88806cf09b00 RBP=ffff88806cf09af0 RSP=ffff88806cf099d8 R8 =ffffffff8608a55a R9 =ffff88806cf09ad8 R10=0000000000038001 R11=0000000000003c0d R12=ffff88806cf09af8 R13=ffff88806cf09ae0 R14=ffff88806cf09b40 R15=ffff88806cf09a98 RIP=ffffffff81131118 RFL=00000212 [----A--] 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=00007fd4eec064b0 CR3=000000001629a000 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=2039303a33343a3231203032206e754a XMM01=73732878696e755f6d6170203a5d3932 XMM02=65736f6c63206e6f6973736573203a29 XMM03=755f6d6170203a5d3932325b64687373 XMM04=69662068637573206f4e203a656c6163 XMM05=3a656c696620766e65206e65706f206f XMM06=65733a6468737328766e655f6d617020 XMM07=6b7a79732039303a33343a3231203032 XMM08=20303d64696720303d64697520612f6e XMM09=00000000000000000000000000000000 XMM10=00000000000000000000000000000000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000