syzkaller login: [ 38.803970] BUG: Bad rss-counter state mm:00000000ade245fc type:MM_FILEPAGES val:33 [ 38.805132] BUG: Bad rss-counter state mm:00000000ade245fc type:MM_ANONPAGES val:22 [ 38.904974] ================================================================== [ 38.905877] BUG: KASAN: slab-use-after-free in vma_interval_tree_remove+0xc75/0xec0 [ 38.906800] Read of size 8 at addr ffff88800e66ded8 by task sshd/219 [ 38.907568] [ 38.907785] CPU: 1 PID: 219 Comm: sshd Not tainted 6.4.0-rc7-next-20230620 #1 [ 38.908803] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS 1.12.0-1 04/01/2014 [ 38.909777] Call Trace: [ 38.910095] [ 38.910382] dump_stack_lvl+0x91/0xf0 [ 38.910875] print_report+0xcc/0x620 [ 38.911398] ? __virt_addr_valid+0x102/0x340 [ 38.911949] ? vma_interval_tree_remove+0xc75/0xec0 [ 38.912560] ? vma_interval_tree_remove+0xc75/0xec0 [ 38.913175] kasan_report+0xbe/0xf0 [ 38.913665] ? vma_interval_tree_remove+0xc75/0xec0 [ 38.914281] vma_interval_tree_remove+0xc75/0xec0 [ 38.914878] vma_prepare+0xc54/0x11a0 [ 38.915372] __split_vma+0x5af/0x950 [ 38.915838] ? __pfx___split_vma+0x10/0x10 [ 38.916365] ? find_held_lock+0x2c/0x110 [ 38.916884] do_vmi_align_munmap+0x2ba/0x11f0 [ 38.917439] ? lock_is_held_type+0x9f/0x120 [ 38.917980] ? __pfx_do_vmi_align_munmap+0x10/0x10 [ 38.918583] ? mtree_range_walk+0x632/0x900 [ 38.919148] ? mas_walk+0x5c7/0x7c0 [ 38.919622] do_vmi_munmap+0x1f1/0x2b0 [ 38.920119] mmap_region+0x1f9/0x2660 [ 38.920601] ? vm_mmap_pgoff+0x15c/0x3a0 [ 38.921119] ? __pfx_arch_get_unmapped_area_topdown+0x10/0x10 [ 38.921828] ? __pfx_lock_acquire+0x10/0x10 [ 38.922352] ? __pfx_mmap_region+0x10/0x10 [ 38.922885] ? security_mmap_addr+0x7d/0xa0 [ 38.923431] ? get_unmapped_area+0x1f5/0x3f0 [ 38.923979] do_mmap+0x854/0xf00 [ 38.924418] vm_mmap_pgoff+0x1a6/0x3a0 [ 38.924919] ? __pfx_vm_mmap_pgoff+0x10/0x10 [ 38.925484] ksys_mmap_pgoff+0x3af/0x500 [ 38.925988] do_syscall_64+0x3f/0x90 [ 38.926467] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 38.927125] RIP: 0033:0x7f4047bb3d82 [ 38.927585] 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 [ 38.929699] RSP: 002b:00007ffee34dae08 EFLAGS: 00000206 ORIG_RAX: 0000000000000009 [ 38.930593] RAX: ffffffffffffffda RBX: 0000000000000812 RCX: 00007f4047bb3d82 [ 38.931457] RDX: 0000000000000005 RSI: 0000000000001000 RDI: 00007f4046fed000 [ 38.932458] RBP: 00007f4046fed000 R08: 0000000000000009 R09: 0000000000001000 [ 38.933291] R10: 0000000000000812 R11: 0000000000000206 R12: 000055ec8f5e1980 [ 38.934113] R13: 00007ffee34dae20 R14: 00007ffee34dae50 R15: 00007ffee34db1b0 [ 38.934942] [ 38.935235] [ 38.935445] Allocated by task 212: [ 38.935864] kasan_save_stack+0x22/0x50 [ 38.936355] kasan_set_track+0x25/0x30 [ 38.936837] __kasan_slab_alloc+0x59/0x70 [ 38.937342] kmem_cache_alloc+0x16b/0x370 [ 38.937847] vm_area_dup+0x20/0x160 [ 38.938289] __split_vma+0x170/0x950 [ 38.938738] split_vma+0xc6/0x110 [ 38.939185] mprotect_fixup+0x8d2/0xb30 [ 38.939674] do_mprotect_pkey+0x87e/0xd40 [ 38.940176] __x64_sys_mprotect+0x78/0xc0 [ 38.940691] do_syscall_64+0x3f/0x90 [ 38.941162] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 38.941790] [ 38.941997] Freed by task 212: [ 38.942373] kasan_save_stack+0x22/0x50 [ 38.942864] kasan_set_track+0x25/0x30 [ 38.943360] kasan_save_free_info+0x2b/0x50 [ 38.943879] __kasan_slab_free+0x10a/0x190 [ 38.944395] kmem_cache_free+0x10d/0x4d0 [ 38.944890] rcu_core+0x8c8/0x2860 [ 38.945316] __do_softirq+0x1b7/0x7d4 [ 38.945783] [ 38.945991] Last potentially related work creation: [ 38.946560] kasan_save_stack+0x22/0x50 [ 38.947055] __kasan_record_aux_stack+0x8e/0xa0 [ 38.947610] __call_rcu_common.constprop.0+0x6a/0xb90 [ 38.948233] remove_vma+0x139/0x170 [ 38.948675] do_vmi_align_munmap+0xd4a/0x11f0 [ 38.949221] do_vmi_munmap+0x1f1/0x2b0 [ 38.949694] __vm_munmap+0x138/0x3a0 [ 38.950203] __x64_sys_munmap+0x59/0x80 [ 38.950691] do_syscall_64+0x3f/0x90 [ 38.951168] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 38.951798] [ 38.952010] Second to last potentially related work creation: [ 38.952682] kasan_save_stack+0x22/0x50 [ 38.953169] __kasan_record_aux_stack+0x8e/0xa0 [ 38.953731] __call_rcu_common.constprop.0+0x6a/0xb90 [ 38.954360] remove_vma+0x139/0x170 [ 38.954803] do_vmi_align_munmap+0xd4a/0x11f0 [ 38.955352] do_vmi_munmap+0x1f1/0x2b0 [ 38.955827] mmap_region+0x1f9/0x2660 [ 38.956292] do_mmap+0x854/0xf00 [ 38.956714] vm_mmap_pgoff+0x1a6/0x3a0 [ 38.957190] ksys_mmap_pgoff+0x3af/0x500 [ 38.957680] do_syscall_64+0x3f/0x90 [ 38.958144] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 38.958769] [ 38.958982] The buggy address belongs to the object at ffff88800e66de80 [ 38.958982] which belongs to the cache vm_area_struct of size 168 [ 38.960423] The buggy address is located 88 bytes inside of [ 38.960423] freed 168-byte region [ffff88800e66de80, ffff88800e66df28) [ 38.961797] [ 38.962012] The buggy address belongs to the physical page: [ 38.962658] page:000000001652fca6 refcount:1 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0xe66d [ 38.963722] memcg:ffff88800fc52701 [ 38.964141] anon flags: 0x100000000000200(slab|node=0|zone=1) [ 38.964830] page_type: 0xffffffff() [ 38.965277] raw: 0100000000000200 ffff8880087a0c80 ffffea000038f9c0 dead000000000007 [ 38.966177] raw: 0000000000000000 0000000000110011 00000001ffffffff ffff88800fc52701 [ 38.967086] page dumped because: kasan: bad access detected [ 38.967737] [ 38.967953] Memory state around the buggy address: [ 38.968516] ffff88800e66dd80: fc fc fc 00 00 00 00 00 00 00 00 00 00 00 00 00 [ 38.969354] ffff88800e66de00: 00 00 00 00 00 00 00 00 fc fc fc fc fc fc fc fc [ 38.970197] >ffff88800e66de80: fa fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb [ 38.971038] ^ [ 38.971754] ffff88800e66df00: fb fb fb fb fb fc fc fc fc fc fc fc fc fc fc fc [ 38.972594] ffff88800e66df80: fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc [ 38.973431] ================================================================== [ 38.974319] Disabling lock debugging due to kernel taint [ 40.676301] BUG: Bad rss-counter state mm:00000000152529af type:MM_FILEPAGES val:33 [ 40.677280] BUG: Bad rss-counter state mm:00000000152529af type:MM_ANONPAGES val:22 [ 41.222478] BUG: Bad rss-counter state mm:00000000cf18130f type:MM_FILEPAGES val:33 [ 41.223473] BUG: Bad rss-counter state mm:00000000cf18130f type:MM_ANONPAGES val:22 Warning: Permanently added '[localhost]:24732' (ECDSA) to the list of known hosts. 2023/06/20 19:31:06 fuzzer started 2023/06/20 19:31:06 dialing manager at localhost:36067 2023/06/20 19:31:06 checking machine... 2023/06/20 19:31:06 checking revisions... [ 41.858883] kmemleak: Automatic memory scanning thread ended 2023/06/20 19:31:06 testing simple program... [ 41.905821] cgroup: Unknown subsys name 'net' [ 41.947815] cgroup: Unknown subsys name 'rlimit' executing program executing program executing program VM DIAGNOSIS: 19:31:06 Registers: info registers vcpu 0 RAX=0000000000000003 RBX=ffff88806ce3a2c0 RCX=1ffffffff0ba7c92 RDX=0000000000000000 RSI=0000000000000008 RDI=ffffffff8136abdd RBP=ffff88806ce3a2d8 RSP=ffff88806ce09e68 R8 =0000000000000000 R9 =0000000000000000 R10=ffffffff85d3d357 R11=ffff888008c04000 R12=ffffffff85616740 R13=ffffffff8542a6c0 R14=0000000000000002 R15=ffff88806ce3a2d2 RIP=ffffffff81377b99 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 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=00007fffc7f4dd68 CR3=000000001a454000 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=2035303a31333a3931203032206e754a XMM01=657463656e6e6f63736944203a5d3832 XMM02=302e303120746f6f722072657375206d XMM03=203a5d3832325b646873732072656c6c XMM04=69662068637573206f4e203a656c6163 XMM05=3a656c696620766e65206e65706f206f XMM06=65733a6468737328766e655f6d617020 XMM07=6b7a79732035303a31333a3931203032 XMM08=3d656e696c646d632022656369767265 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=00007f4667d1a900 CR3=000000000c9e0000 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=7659996102983bb0884b62cd8607c912 XMM02=2c67c8bc2e329bc3000000000011ac70 XMM03=fb795ef6d65770560000000000121630 XMM04=a1658c74298f46b200000000000ae988 XMM05=dfcdbad4f1609c370000000000132498 XMM06=752be5059bfceb410000000000131670 XMM07=e042d86d42eb936e00000000001218b0 XMM08=d5e851d9d422784d000000000011acd0 XMM09=00000000000000000000000000000000 XMM10=20200000000020202020202020200000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000