syzkaller login: [ 32.454081] BUG: Bad rss-counter state mm:00000000c8020610 type:MM_FILEPAGES val:33 [ 32.455073] BUG: Bad rss-counter state mm:00000000c8020610 type:MM_ANONPAGES val:22 [ 32.630913] ================================================================== [ 32.632166] BUG: KASAN: slab-use-after-free in vma_interval_tree_remove+0xc75/0xec0 [ 32.633659] Read of size 8 at addr ffff88800fc99c20 by task sshd/221 [ 32.634725] [ 32.635020] CPU: 1 PID: 221 Comm: sshd Not tainted 6.4.0-rc7-next-20230619 #1 [ 32.636197] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS 1.12.0-1 04/01/2014 [ 32.637554] Call Trace: [ 32.637964] [ 32.638292] dump_stack_lvl+0x91/0xf0 [ 32.638858] print_report+0xcc/0x620 [ 32.639447] ? __virt_addr_valid+0x102/0x340 [ 32.640096] ? vma_interval_tree_remove+0xc75/0xec0 [ 32.640805] ? vma_interval_tree_remove+0xc75/0xec0 [ 32.641537] kasan_report+0xbe/0xf0 [ 32.642095] ? vma_interval_tree_remove+0xc75/0xec0 [ 32.642821] vma_interval_tree_remove+0xc75/0xec0 [ 32.643511] vma_prepare+0xc54/0x11a0 [ 32.644067] __split_vma+0x5af/0x950 [ 32.644610] ? __pfx___split_vma+0x10/0x10 [ 32.645242] ? find_held_lock+0x2c/0x110 [ 32.645844] do_vmi_align_munmap+0x2ba/0x11f0 [ 32.646505] ? lock_is_held_type+0x9f/0x120 [ 32.647122] ? __pfx_do_vmi_align_munmap+0x10/0x10 [ 32.647853] ? mtree_range_walk+0x632/0x900 [ 32.648499] ? mas_walk+0x5c7/0x7c0 [ 32.649090] do_vmi_munmap+0x1f1/0x2b0 [ 32.649675] mmap_region+0x1f9/0x2660 [ 32.650252] ? vm_mmap_pgoff+0x15c/0x3a0 [ 32.650865] ? __pfx_arch_get_unmapped_area_topdown+0x10/0x10 [ 32.651719] ? __pfx_lock_acquire+0x10/0x10 [ 32.652355] ? __pfx_mmap_region+0x10/0x10 [ 32.653000] ? security_mmap_addr+0x7d/0xa0 [ 32.653630] ? get_unmapped_area+0x1f5/0x3f0 [ 32.654280] do_mmap+0x854/0xf00 [ 32.654792] vm_mmap_pgoff+0x1a6/0x3a0 [ 32.655372] ? __pfx_vm_mmap_pgoff+0x10/0x10 [ 32.656038] ksys_mmap_pgoff+0x3af/0x500 [ 32.656636] do_syscall_64+0x3f/0x90 [ 32.657205] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 32.657960] RIP: 0033:0x7f0f2b206d82 [ 32.658498] 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 [ 32.661008] RSP: 002b:00007ffe4c42caa8 EFLAGS: 00000206 ORIG_RAX: 0000000000000009 [ 32.662068] RAX: ffffffffffffffda RBX: 0000000000000812 RCX: 00007f0f2b206d82 [ 32.663062] RDX: 0000000000000005 RSI: 0000000000001000 RDI: 00007f0f2a640000 [ 32.664062] RBP: 00007f0f2a640000 R08: 0000000000000009 R09: 0000000000001000 [ 32.665072] R10: 0000000000000812 R11: 0000000000000206 R12: 0000563ffd94f980 [ 32.666059] R13: 00007ffe4c42cac0 R14: 00007ffe4c42caf0 R15: 00007ffe4c42ce50 [ 32.667062] [ 32.667403] [ 32.667655] Allocated by task 214: [ 32.668160] kasan_save_stack+0x22/0x50 [ 32.668750] kasan_set_track+0x25/0x30 [ 32.669352] __kasan_slab_alloc+0x59/0x70 [ 32.669964] kmem_cache_alloc+0x16b/0x370 [ 32.670568] vm_area_dup+0x20/0x160 [ 32.671095] __split_vma+0x170/0x950 [ 32.671649] split_vma+0xc6/0x110 [ 32.672166] mprotect_fixup+0x8d2/0xb30 [ 32.672756] do_mprotect_pkey+0x87e/0xd40 [ 32.673370] __x64_sys_mprotect+0x78/0xc0 [ 32.674010] do_syscall_64+0x3f/0x90 [ 32.674570] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 32.675321] [ 32.675572] Freed by task 204: [ 32.676029] kasan_save_stack+0x22/0x50 [ 32.676619] kasan_set_track+0x25/0x30 [ 32.677214] kasan_save_free_info+0x2b/0x50 [ 32.677840] __kasan_slab_free+0x10a/0x190 [ 32.678467] kmem_cache_free+0x10d/0x4d0 [ 32.679059] rcu_core+0x8c8/0x2860 [ 32.679583] __do_softirq+0x1b7/0x7d4 [ 32.680140] [ 32.680392] Last potentially related work creation: [ 32.681082] kasan_save_stack+0x22/0x50 [ 32.681668] __kasan_record_aux_stack+0x8e/0xa0 [ 32.682344] __call_rcu_common.constprop.0+0x6a/0xb90 [ 32.683088] remove_vma+0x139/0x170 [ 32.683613] do_vmi_align_munmap+0xd4a/0x11f0 [ 32.684267] do_vmi_munmap+0x1f1/0x2b0 [ 32.684849] __vm_munmap+0x138/0x3a0 [ 32.685397] __x64_sys_munmap+0x59/0x80 [ 32.685978] do_syscall_64+0x3f/0x90 [ 32.686529] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 32.687278] [ 32.687528] The buggy address belongs to the object at ffff88800fc99bc8 [ 32.687528] which belongs to the cache vm_area_struct of size 168 [ 32.689262] The buggy address is located 88 bytes inside of [ 32.689262] freed 168-byte region [ffff88800fc99bc8, ffff88800fc99c70) [ 32.690900] [ 32.691151] The buggy address belongs to the physical page: [ 32.691927] page:0000000071362a3e refcount:1 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0xfc99 [ 32.693201] memcg:ffff88800dfa4401 [ 32.693694] flags: 0x100000000000200(slab|node=0|zone=1) [ 32.694450] page_type: 0xffffffff() [ 32.694973] raw: 0100000000000200 ffff88800879fc80 dead000000000122 0000000000000000 [ 32.695999] raw: 0000000000000000 0000000000110011 00000001ffffffff ffff88800dfa4401 [ 32.697020] page dumped because: kasan: bad access detected [ 32.697764] [ 32.698010] Memory state around the buggy address: [ 32.698678] ffff88800fc99b00: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 [ 32.699680] ffff88800fc99b80: 00 fc fc fc fc fc fc fc fc fa fb fb fb fb fb fb [ 32.700676] >ffff88800fc99c00: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fc fc [ 32.701679] ^ [ 32.702291] ffff88800fc99c80: fc fc fc fc fc fc fa fb fb fb fb fb fb fb fb fb [ 32.703293] ffff88800fc99d00: fb fb fb fb fb fb fb fb fb fb fb fc fc fc fc fc [ 32.704284] ================================================================== [ 32.705390] Disabling lock debugging due to kernel taint [ 34.607675] BUG: Bad rss-counter state mm:000000009852574e type:MM_FILEPAGES val:33 [ 34.608275] BUG: Bad rss-counter state mm:000000009852574e type:MM_ANONPAGES val:22 [ 35.033858] BUG: Bad rss-counter state mm:00000000b928c753 type:MM_FILEPAGES val:33 [ 35.035193] BUG: Bad rss-counter state mm:00000000b928c753 type:MM_ANONPAGES val:22 Warning: Permanently added '[localhost]:38759' (ECDSA) to the list of known hosts. 2023/06/19 10:55:51 fuzzer started 2023/06/19 10:55:52 dialing manager at localhost:44161 2023/06/19 10:55:52 checking machine... 2023/06/19 10:55:52 checking revisions... [ 35.697843] kmemleak: Automatic memory scanning thread ended 2023/06/19 10:55:52 testing simple program... [ 35.753432] cgroup: Unknown subsys name 'net' [ 35.790597] cgroup: Unknown subsys name 'rlimit' executing program executing program executing program VM DIAGNOSIS: 10:55:50 Registers: info registers vcpu 0 RAX=00007fa5af77e2fd RBX=0000000000000001 RCX=0000000000000001 RDX=ffff8880147e0001 RSI=ffff8880147dff58 RDI=ffff8880147dffd8 RBP=ffff88806ce09af0 RSP=ffff88806ce09a28 R8 =ffffffff864b9d5a R9 =ffff88806ce09ad8 R10=0000000000038001 R11=00000000000b6996 R12=ffff88806ce09af8 R13=ffff88806ce09ae0 R14=ffff8880147dff58 R15=ffff88806ce09a98 RIP=ffffffff811317b0 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 00007fa5aeeb4900 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=00007fa5ae3d5018 CR3=000000000f760000 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=99222d1b461968a300000000000ae988 XMM05=5a889ac46b68967f0000000000135da0 XMM06=c291bd5c70af25b90000000000134b90 XMM07=fb795ef6d65770560000000000125118 XMM08=4f5453444600273d67736d000d0a0920 XMM09=00000000000000000000000000000000 XMM10=00000000000000000000000000000000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000 info registers vcpu 1 RAX=1ffffffff0c11183 RBX=0000000000000001 RCX=ffffffff86088c1a RDX=0000000000000000 RSI=dffffc0000000000 RDI=ffffffff86088c1c RBP=ffff88800fe975d8 RSP=ffff88800fe974c0 R8 =ffffffff86088c1e R9 =ffff88800fe975c0 R10=0000000000038001 R11=0000000000003c0d R12=ffff88800fe975e0 R13=ffff88800fe975c8 R14=ffff88800fe97628 R15=ffff88800fe97580 RIP=ffffffff811311c7 RFL=00000213 [----A-C] 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 00007f3b3182d900 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=00007ffcbf55c000 CR3=0000000019978000 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=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