syzkaller login: [ 31.139986] BUG: Bad rss-counter state mm:0000000050db400a type:MM_FILEPAGES val:33 [ 31.140739] BUG: Bad rss-counter state mm:0000000050db400a type:MM_ANONPAGES val:22 [ 31.279270] ================================================================== [ 31.279975] BUG: KASAN: slab-use-after-free in vma_interval_tree_remove+0xc75/0xec0 [ 31.280654] Read of size 8 at addr ffff888019b184e0 by task sshd/222 [ 31.281208] [ 31.281360] CPU: 1 PID: 222 Comm: sshd Not tainted 6.4.0-rc7-next-20230620 #1 [ 31.281968] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS 1.12.0-1 04/01/2014 [ 31.282685] Call Trace: [ 31.282903] [ 31.283114] dump_stack_lvl+0x91/0xf0 [ 31.283720] print_report+0xcc/0x620 [ 31.284114] ? __virt_addr_valid+0x102/0x340 [ 31.284509] ? vma_interval_tree_remove+0xc75/0xec0 [ 31.284940] ? vma_interval_tree_remove+0xc75/0xec0 [ 31.285394] kasan_report+0xbe/0xf0 [ 31.285752] ? vma_interval_tree_remove+0xc75/0xec0 [ 31.286222] vma_interval_tree_remove+0xc75/0xec0 [ 31.286639] vma_prepare+0xc54/0x11a0 [ 31.286982] __split_vma+0x5af/0x950 [ 31.287361] ? __pfx___split_vma+0x10/0x10 [ 31.287765] ? find_held_lock+0x2c/0x110 [ 31.288142] do_vmi_align_munmap+0x2ba/0x11f0 [ 31.288518] ? lock_is_held_type+0x9f/0x120 [ 31.288882] ? __pfx_do_vmi_align_munmap+0x10/0x10 [ 31.289314] ? mtree_range_walk+0x632/0x900 [ 31.289688] ? mas_walk+0x5c7/0x7c0 [ 31.290024] do_vmi_munmap+0x1f1/0x2b0 [ 31.290365] mmap_region+0x1f9/0x2660 [ 31.290722] ? vm_mmap_pgoff+0x15c/0x3a0 [ 31.291059] ? __pfx_arch_get_unmapped_area_topdown+0x10/0x10 [ 31.291520] ? __pfx_lock_acquire+0x10/0x10 [ 31.291895] ? __pfx_mmap_region+0x10/0x10 [ 31.292250] ? security_mmap_addr+0x7d/0xa0 [ 31.292588] ? get_unmapped_area+0x1f5/0x3f0 [ 31.292952] do_mmap+0x854/0xf00 [ 31.293244] vm_mmap_pgoff+0x1a6/0x3a0 [ 31.293561] ? __pfx_vm_mmap_pgoff+0x10/0x10 [ 31.293932] ksys_mmap_pgoff+0x3af/0x500 [ 31.294282] do_syscall_64+0x3f/0x90 [ 31.294608] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 31.295057] RIP: 0033:0x7f58043e1d82 [ 31.295374] 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 [ 31.296814] RSP: 002b:00007ffde19d9178 EFLAGS: 00000206 ORIG_RAX: 0000000000000009 [ 31.297408] RAX: ffffffffffffffda RBX: 0000000000000812 RCX: 00007f58043e1d82 [ 31.297980] RDX: 0000000000000005 RSI: 0000000000001000 RDI: 00007f580381b000 [ 31.298571] RBP: 00007f580381b000 R08: 0000000000000009 R09: 0000000000001000 [ 31.299137] R10: 0000000000000812 R11: 0000000000000206 R12: 000055d998b91b20 [ 31.299708] R13: 00007ffde19d9190 R14: 00007ffde19d91c0 R15: 00007ffde19d9520 [ 31.300329] [ 31.300542] [ 31.300696] Allocated by task 213: [ 31.300997] kasan_save_stack+0x22/0x50 [ 31.301356] kasan_set_track+0x25/0x30 [ 31.301715] __kasan_slab_alloc+0x59/0x70 [ 31.302074] kmem_cache_alloc+0x16b/0x370 [ 31.302426] vm_area_dup+0x20/0x160 [ 31.302724] __split_vma+0x170/0x950 [ 31.303034] split_vma+0xc6/0x110 [ 31.303352] mprotect_fixup+0x8d2/0xb30 [ 31.303686] do_mprotect_pkey+0x87e/0xd40 [ 31.304079] __x64_sys_mprotect+0x78/0xc0 [ 31.304461] do_syscall_64+0x3f/0x90 [ 31.304790] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 31.305211] [ 31.305354] Freed by task 203: [ 31.305622] kasan_save_stack+0x22/0x50 [ 31.305983] kasan_set_track+0x25/0x30 [ 31.306316] kasan_save_free_info+0x2b/0x50 [ 31.306663] __kasan_slab_free+0x10a/0x190 [ 31.307000] kmem_cache_free+0x10d/0x4d0 [ 31.307335] rcu_core+0x8c8/0x2860 [ 31.307626] __do_softirq+0x1b7/0x7d4 [ 31.307961] [ 31.308097] Last potentially related work creation: [ 31.308495] kasan_save_stack+0x22/0x50 [ 31.308837] __kasan_record_aux_stack+0x8e/0xa0 [ 31.309248] __call_rcu_common.constprop.0+0x6a/0xb90 [ 31.309693] remove_vma+0x139/0x170 [ 31.309979] do_vmi_align_munmap+0xd4a/0x11f0 [ 31.310398] do_vmi_munmap+0x1f1/0x2b0 [ 31.310724] __vm_munmap+0x138/0x3a0 [ 31.311036] __x64_sys_munmap+0x59/0x80 [ 31.311382] do_syscall_64+0x3f/0x90 [ 31.311702] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 31.312196] [ 31.312338] The buggy address belongs to the object at ffff888019b18488 [ 31.312338] which belongs to the cache vm_area_struct of size 168 [ 31.313314] The buggy address is located 88 bytes inside of [ 31.313314] freed 168-byte region [ffff888019b18488, ffff888019b18530) [ 31.314243] [ 31.314387] The buggy address belongs to the physical page: [ 31.314817] page:00000000ded6f4da refcount:1 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0x19b18 [ 31.315558] memcg:ffff888019a0ae01 [ 31.315882] flags: 0x100000000000200(slab|node=0|zone=1) [ 31.316319] page_type: 0xffffffff() [ 31.316623] raw: 0100000000000200 ffff8880087a0c80 dead000000000122 0000000000000000 [ 31.317292] raw: 0000000000000000 0000000000110011 00000001ffffffff ffff888019a0ae01 [ 31.317927] page dumped because: kasan: bad access detected [ 31.318357] [ 31.318496] Memory state around the buggy address: [ 31.318878] ffff888019b18380: fc fc fc fc 00 00 00 00 00 00 00 00 00 00 00 00 [ 31.319430] ffff888019b18400: 00 00 00 00 00 00 00 00 00 fc fc fc fc fc fc fc [ 31.320033] >ffff888019b18480: fc fa fb fb fb fb fb fb fb fb fb fb fb fb fb fb [ 31.320583] ^ [ 31.321075] ffff888019b18500: fb fb fb fb fb fb fc fc fc fc fc fc fc fc fa fb [ 31.321620] ffff888019b18580: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb [ 31.322167] ================================================================== [ 31.323030] Disabling lock debugging due to kernel taint [ 32.747495] BUG: Bad rss-counter state mm:00000000bb116439 type:MM_FILEPAGES val:33 [ 32.748350] BUG: Bad rss-counter state mm:00000000bb116439 type:MM_ANONPAGES val:22 [ 33.116117] BUG: Bad rss-counter state mm:00000000de38a948 type:MM_FILEPAGES val:33 [ 33.116863] BUG: Bad rss-counter state mm:00000000de38a948 type:MM_ANONPAGES val:22 Warning: Permanently added '[localhost]:36912' (ECDSA) to the list of known hosts. 2023/06/21 09:51:40 fuzzer started 2023/06/21 09:51:40 dialing manager at localhost:36067 2023/06/21 09:51:40 checking machine... 2023/06/21 09:51:40 checking revisions... [ 33.681366] kmemleak: Automatic memory scanning thread ended 2023/06/21 09:51:40 testing simple program... [ 33.724383] cgroup: Unknown subsys name 'net' [ 33.769351] cgroup: Unknown subsys name 'rlimit' executing program executing program executing program VM DIAGNOSIS: 09:51:40 Registers: info registers vcpu 0 RAX=ffff88800f3e81a0 RBX=ffff88800f3e8140 RCX=ffffffff8181f414 RDX=0000000000000000 RSI=0000000000000008 RDI=ffff88800f3e81a0 RBP=0000000000000000 RSP=ffff888014327448 R8 =0000000000000006 R9 =0000000000000000 R10=0000000000000386 R11=0000000000000001 R12=1ffff11002864e8c R13=ffff88800f3e81a0 R14=ffff88800f3e81e0 R15=ffff88800f3e8188 RIP=ffffffff8180f032 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 00007fc4ffe5d900 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=00007f4e267c7650 CR3=000000000ca86000 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=756f6a2f646d65747379732f6e75722f XMM01=00676f6c7379732f6c616e72756f6a2f XMM02=756f6a2f646d65747379732f6e75722f XMM03=006c616e72756f6a2f646d6574737973 XMM04=0987b382c124e2f300000000000ae988 XMM05=73affa6e4087ff3d0000000000132990 XMM06=19e9129bd510f2350000000000131848 XMM07=fb795ef6d65770560000000000121a70 XMM08=4f5453444600273d67736d000d0a0920 XMM09=00000000000000000000000000000000 XMM10=20200000000020202020202020200000 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=00007ffd8abc3fb8 CR3=000000000f4de000 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=2030343a31353a3930203132206e754a XMM01=73732878696e755f6d6170203a5d3932 XMM02=65736f6c63206e6f6973736573203a29 XMM03=755f6d6170203a5d3932325b64687373 XMM04=69662068637573206f4e203a656c6163 XMM05=3a656c696620766e65206e65706f206f XMM06=65733a6468737328766e655f6d617020 XMM07=6b7a79732030343a31353a3930203132 XMM08=69767265733d7373616c63742030733a XMM09=00000000000000000000000000000000 XMM10=00000000000000000000000000000000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000