syzkaller login: [ 38.845826] BUG: Bad rss-counter state mm:00000000b2e79e04 type:MM_FILEPAGES val:33 [ 38.847114] BUG: Bad rss-counter state mm:00000000b2e79e04 type:MM_ANONPAGES val:22 [ 38.884913] ================================================================== [ 38.885867] BUG: KASAN: slab-use-after-free in vma_interval_tree_remove+0xc75/0xec0 [ 38.886835] Read of size 8 at addr ffff888018798b38 by task sshd/218 [ 38.887731] [ 38.887952] CPU: 0 PID: 218 Comm: sshd Not tainted 6.4.0-rc7-next-20230620 #1 [ 38.888846] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS 1.12.0-1 04/01/2014 [ 38.889858] Call Trace: [ 38.890191] [ 38.890481] dump_stack_lvl+0x91/0xf0 [ 38.890996] print_report+0xcc/0x620 [ 38.891493] ? __virt_addr_valid+0x102/0x340 [ 38.892061] ? vma_interval_tree_remove+0xc75/0xec0 [ 38.892690] ? vma_interval_tree_remove+0xc75/0xec0 [ 38.893322] kasan_report+0xbe/0xf0 [ 38.893812] ? vma_interval_tree_remove+0xc75/0xec0 [ 38.894448] vma_interval_tree_remove+0xc75/0xec0 [ 38.895089] vma_prepare+0xc54/0x11a0 [ 38.895583] __split_vma+0x5af/0x950 [ 38.896082] ? __pfx___split_vma+0x10/0x10 [ 38.896631] ? find_held_lock+0x2c/0x110 [ 38.897177] do_vmi_align_munmap+0x2ba/0x11f0 [ 38.897761] ? lock_is_held_type+0x9f/0x120 [ 38.898320] ? __pfx_do_vmi_align_munmap+0x10/0x10 [ 38.898955] ? mtree_range_walk+0x632/0x900 [ 38.899525] ? mas_walk+0x5c7/0x7c0 [ 38.900014] do_vmi_munmap+0x1f1/0x2b0 [ 38.900519] mmap_region+0x1f9/0x2660 [ 38.901016] ? vm_mmap_pgoff+0x15c/0x3a0 [ 38.901551] ? __pfx_arch_get_unmapped_area_topdown+0x10/0x10 [ 38.902282] ? __pfx_lock_acquire+0x10/0x10 [ 38.902823] ? __pfx_mmap_region+0x10/0x10 [ 38.903377] ? security_mmap_addr+0x7d/0xa0 [ 38.903920] ? get_unmapped_area+0x1f5/0x3f0 [ 38.904484] do_mmap+0x854/0xf00 [ 38.904938] vm_mmap_pgoff+0x1a6/0x3a0 [ 38.905452] ? __pfx_vm_mmap_pgoff+0x10/0x10 [ 38.906028] ksys_mmap_pgoff+0x3af/0x500 [ 38.906554] do_syscall_64+0x3f/0x90 [ 38.907072] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 38.907738] RIP: 0033:0x7f827ef3dd82 [ 38.908210] 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 [ 38.910321] RSP: 002b:00007ffc9bd0a9a8 EFLAGS: 00000206 ORIG_RAX: 0000000000000009 [ 38.911225] RAX: ffffffffffffffda RBX: 0000000000000812 RCX: 00007f827ef3dd82 [ 38.912063] RDX: 0000000000000005 RSI: 0000000000001000 RDI: 00007f827e377000 [ 38.912904] RBP: 00007f827e377000 R08: 0000000000000009 R09: 0000000000001000 [ 38.913743] R10: 0000000000000812 R11: 0000000000000206 R12: 0000556a06141ec0 [ 38.914586] R13: 00007ffc9bd0a9c0 R14: 00007ffc9bd0a9f0 R15: 00007ffc9bd0ad50 [ 38.915443] [ 38.915738] [ 38.915949] Allocated by task 211: [ 38.916372] kasan_save_stack+0x22/0x50 [ 38.916881] kasan_set_track+0x25/0x30 [ 38.917377] __kasan_slab_alloc+0x59/0x70 [ 38.917918] kmem_cache_alloc+0x16b/0x370 [ 38.918448] vm_area_dup+0x20/0x160 [ 38.918911] __split_vma+0x170/0x950 [ 38.919400] split_vma+0xc6/0x110 [ 38.919855] mprotect_fixup+0x8d2/0xb30 [ 38.920374] do_mprotect_pkey+0x87e/0xd40 [ 38.920911] __x64_sys_mprotect+0x78/0xc0 [ 38.921445] do_syscall_64+0x3f/0x90 [ 38.921927] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 38.922589] [ 38.922809] Freed by task 211: [ 38.923214] kasan_save_stack+0x22/0x50 [ 38.923725] kasan_set_track+0x25/0x30 [ 38.924226] kasan_save_free_info+0x2b/0x50 [ 38.924773] __kasan_slab_free+0x10a/0x190 [ 38.925316] kmem_cache_free+0x10d/0x4d0 [ 38.925836] rcu_core+0x8c8/0x2860 [ 38.926293] __do_softirq+0x1b7/0x7d4 [ 38.926782] [ 38.927023] Last potentially related work creation: [ 38.927626] kasan_save_stack+0x22/0x50 [ 38.928146] __kasan_record_aux_stack+0x8e/0xa0 [ 38.928731] __call_rcu_common.constprop.0+0x6a/0xb90 [ 38.929393] remove_vma+0x139/0x170 [ 38.929861] do_vmi_align_munmap+0xd4a/0x11f0 [ 38.930430] do_vmi_munmap+0x1f1/0x2b0 [ 38.930931] __vm_munmap+0x138/0x3a0 [ 38.931410] __x64_sys_munmap+0x59/0x80 [ 38.931918] do_syscall_64+0x3f/0x90 [ 38.932411] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 38.933085] [ 38.933304] The buggy address belongs to the object at ffff888018798ae0 [ 38.933304] which belongs to the cache vm_area_struct of size 168 [ 38.934819] The buggy address is located 88 bytes inside of [ 38.934819] freed 168-byte region [ffff888018798ae0, ffff888018798b88) [ 38.936272] [ 38.936500] The buggy address belongs to the physical page: [ 38.937186] page:00000000208498c8 refcount:1 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0x18798 [ 38.938314] memcg:ffff88800ea16a01 [ 38.938752] anon flags: 0x100000000000200(slab|node=0|zone=1) [ 38.939481] page_type: 0xffffffff() [ 38.939950] raw: 0100000000000200 ffff8880087a0c80 ffffea00005aa5c0 dead000000000007 [ 38.940901] raw: 0000000000000000 0000000000110011 00000001ffffffff ffff88800ea16a01 [ 38.941831] page dumped because: kasan: bad access detected [ 38.942518] [ 38.942740] Memory state around the buggy address: [ 38.943347] ffff888018798a00: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb [ 38.944230] ffff888018798a80: fb fb fb fb fc fc fc fc fc fc fc fc fa fb fb fb [ 38.945109] >ffff888018798b00: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb [ 38.945983] ^ [ 38.946614] ffff888018798b80: fb fc fc fc fc fc fc fc fc 00 00 00 00 00 00 00 [ 38.947506] ffff888018798c00: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 fc fc [ 38.948387] ================================================================== [ 38.949533] Disabling lock debugging due to kernel taint [ 40.885199] BUG: Bad rss-counter state mm:00000000bad61c40 type:MM_FILEPAGES val:33 [ 40.886144] BUG: Bad rss-counter state mm:00000000bad61c40 type:MM_ANONPAGES val:22 [ 41.426416] BUG: Bad rss-counter state mm:00000000bdf7315f type:MM_FILEPAGES val:33 [ 41.427595] BUG: Bad rss-counter state mm:00000000bdf7315f type:MM_ANONPAGES val:22 Warning: Permanently added '[localhost]:30011' (ECDSA) to the list of known hosts. 2023/06/20 12:24:14 fuzzer started 2023/06/20 12:24:15 dialing manager at localhost:36067 2023/06/20 12:24:15 checking machine... 2023/06/20 12:24:15 checking revisions... [ 42.202879] kmemleak: Automatic memory scanning thread ended 2023/06/20 12:24:15 testing simple program... [ 42.249624] cgroup: Unknown subsys name 'net' [ 42.294429] cgroup: Unknown subsys name 'rlimit' executing program executing program executing program VM DIAGNOSIS: 12:24:14 Registers: info registers vcpu 0 RAX=1ffffffff0bf4ae0 RBX=ffffffff85fa5700 RCX=ffffffff83640611 RDX=0000000000000000 RSI=ffffffff863b40b2 RDI=ffffffff85fa56e0 RBP=ffffffff85fa56e0 RSP=ffff888016d5f360 R8 =ffffffff863b40b2 R9 =ffff888016d5f458 R10=0000000000038001 R11=000000000008ab47 R12=ffffffff85fa5724 R13=ffffffff85fa56e0 R14=ffffffff85fa56e0 R15=dffffc0000000000 RIP=ffffffff8112fc7f 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 00007f49d8e6b900 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=00007ffcefcf2000 CR3=000000001ce00000 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=0000000000000000 RBX=ffff88806cf09b60 RCX=0000000000000001 RDX=1ffff1100d9e136d RSI=ffffffff81102614 RDI=ffff88806cf09b68 RBP=000000000000000e RSP=ffff88806cf09a78 R8 =0000000000000001 R9 =ffff88806cf09ad8 R10=0000000000038001 R11=000000000000baa4 R12=ffff88806cf09b60 R13=0000000000000000 R14=ffff888008d951c0 R15=ffff88800ec7e8d0 RIP=ffffffff813ad4be 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=00007f1c7c379410 CR3=0000000010224000 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=2034313a34323a3231203032206e754a XMM01=73732878696e755f6d6170203a5d3732 XMM02=65736f6c63206e6f6973736573203a29 XMM03=755f6d6170203a5d3732325b64687373 XMM04=69662068637573206f4e203a656c6163 XMM05=3a656c696620766e65206e65706f206f XMM06=65733a6468737328766e655f6d617020 XMM07=6b7a79732034313a34323a3231203032 XMM08=3d656e696c646d632022656369767265 XMM09=00000000000000000000000000000000 XMM10=00000000000000000000000000000000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000