syzkaller login: [ 34.435898] BUG: Bad rss-counter state mm:0000000096249852 type:MM_FILEPAGES val:33 [ 34.437188] BUG: Bad rss-counter state mm:0000000096249852 type:MM_ANONPAGES val:22 [ 34.474716] ================================================================== [ 34.475617] BUG: KASAN: slab-use-after-free in vma_interval_tree_remove+0xc75/0xec0 [ 34.476552] Read of size 8 at addr ffff88800fcae968 by task sshd/220 [ 34.477415] [ 34.477633] CPU: 0 PID: 220 Comm: sshd Not tainted 6.4.0-rc7-next-20230619 #1 [ 34.478543] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS 1.12.0-1 04/01/2014 [ 34.479543] Call Trace: [ 34.479861] <TASK> [ 34.480161] dump_stack_lvl+0x91/0xf0 [ 34.480649] print_report+0xcc/0x620 [ 34.481152] ? __virt_addr_valid+0x102/0x340 [ 34.481700] ? vma_interval_tree_remove+0xc75/0xec0 [ 34.482361] ? vma_interval_tree_remove+0xc75/0xec0 [ 34.482979] kasan_report+0xbe/0xf0 [ 34.483465] ? vma_interval_tree_remove+0xc75/0xec0 [ 34.484099] vma_interval_tree_remove+0xc75/0xec0 [ 34.484721] vma_prepare+0xc54/0x11a0 [ 34.485226] __split_vma+0x5af/0x950 [ 34.485705] ? __pfx___split_vma+0x10/0x10 [ 34.486270] ? find_held_lock+0x2c/0x110 [ 34.486805] do_vmi_align_munmap+0x2ba/0x11f0 [ 34.487388] ? lock_is_held_type+0x9f/0x120 [ 34.487928] ? __pfx_do_vmi_align_munmap+0x10/0x10 [ 34.488549] ? mtree_range_walk+0x632/0x900 [ 34.489118] ? mas_walk+0x5c7/0x7c0 [ 34.489598] do_vmi_munmap+0x1f1/0x2b0 [ 34.490098] mmap_region+0x1f9/0x2660 [ 34.490630] ? vm_mmap_pgoff+0x15c/0x3a0 [ 34.491161] ? __pfx_arch_get_unmapped_area_topdown+0x10/0x10 [ 34.491875] ? __pfx_lock_acquire+0x10/0x10 [ 34.492424] ? __pfx_mmap_region+0x10/0x10 [ 34.492958] ? security_mmap_addr+0x7d/0xa0 [ 34.493505] ? get_unmapped_area+0x1f5/0x3f0 [ 34.494062] do_mmap+0x854/0xf00 [ 34.494543] vm_mmap_pgoff+0x1a6/0x3a0 [ 34.495045] ? __pfx_vm_mmap_pgoff+0x10/0x10 [ 34.495619] ksys_mmap_pgoff+0x3af/0x500 [ 34.496150] do_syscall_64+0x3f/0x90 [ 34.496635] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 34.497301] RIP: 0033:0x7fd7d1b8bd82 [ 34.497763] 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 [ 34.499954] RSP: 002b:00007fff73306648 EFLAGS: 00000206 ORIG_RAX: 0000000000000009 [ 34.500882] RAX: ffffffffffffffda RBX: 0000000000000812 RCX: 00007fd7d1b8bd82 [ 34.501748] RDX: 0000000000000005 RSI: 0000000000001000 RDI: 00007fd7d0fc5000 [ 34.502639] RBP: 00007fd7d0fc5000 R08: 0000000000000009 R09: 0000000000001000 [ 34.503509] R10: 0000000000000812 R11: 0000000000000206 R12: 0000555d232e4d90 [ 34.504371] R13: 00007fff73306660 R14: 00007fff73306690 R15: 00007fff733069f0 [ 34.505234] </TASK> [ 34.505532] [ 34.505748] Allocated by task 213: [ 34.506215] kasan_save_stack+0x22/0x50 [ 34.506720] kasan_set_track+0x25/0x30 [ 34.507228] __kasan_slab_alloc+0x59/0x70 [ 34.507756] kmem_cache_alloc+0x16b/0x370 [ 34.508280] vm_area_dup+0x20/0x160 [ 34.508740] __split_vma+0x170/0x950 [ 34.509223] split_vma+0xc6/0x110 [ 34.509660] mprotect_fixup+0x8d2/0xb30 [ 34.510201] do_mprotect_pkey+0x87e/0xd40 [ 34.510739] __x64_sys_mprotect+0x78/0xc0 [ 34.511285] do_syscall_64+0x3f/0x90 [ 34.511764] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 34.512417] [ 34.512639] Freed by task 213: [ 34.513039] kasan_save_stack+0x22/0x50 [ 34.513560] kasan_set_track+0x25/0x30 [ 34.514065] kasan_save_free_info+0x2b/0x50 [ 34.514818] __kasan_slab_free+0x10a/0x190 [ 34.515528] kmem_cache_free+0x10d/0x4d0 [ 34.516105] rcu_core+0x8c8/0x2860 [ 34.516554] __do_softirq+0x1b7/0x7d4 [ 34.517085] [ 34.517328] Last potentially related work creation: [ 34.517989] kasan_save_stack+0x22/0x50 [ 34.518566] __kasan_record_aux_stack+0x8e/0xa0 [ 34.519197] __call_rcu_common.constprop.0+0x6a/0xb90 [ 34.519903] remove_vma+0x139/0x170 [ 34.520405] do_vmi_align_munmap+0xd4a/0x11f0 [ 34.521028] do_vmi_munmap+0x1f1/0x2b0 [ 34.521557] __vm_munmap+0x138/0x3a0 [ 34.522075] __x64_sys_munmap+0x59/0x80 [ 34.522627] do_syscall_64+0x3f/0x90 [ 34.523141] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 34.523843] [ 34.524160] The buggy address belongs to the object at ffff88800fcae910 [ 34.524160] which belongs to the cache vm_area_struct of size 168 [ 34.526197] The buggy address is located 88 bytes inside of [ 34.526197] freed 168-byte region [ffff88800fcae910, ffff88800fcae9b8) [ 34.527832] [ 34.528085] The buggy address belongs to the physical page: [ 34.528776] page:000000004f9de8f8 refcount:1 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0xfcae [ 34.529958] memcg:ffff88801c0ec901 [ 34.530430] flags: 0x100000000000200(slab|node=0|zone=1) [ 34.531141] page_type: 0xffffffff() [ 34.531660] raw: 0100000000000200 ffff88800879fc80 dead000000000122 0000000000000000 [ 34.532672] raw: 0000000000000000 0000000000110011 00000001ffffffff ffff88801c0ec901 [ 34.533669] page dumped because: kasan: bad access detected [ 34.534403] [ 34.534628] Memory state around the buggy address: [ 34.535248] ffff88800fcae800: fc fc fc fc fc 00 00 00 00 00 00 00 00 00 00 00 [ 34.536170] ffff88800fcae880: 00 00 00 00 00 00 00 00 00 00 fc fc fc fc fc fc [ 34.537095] >ffff88800fcae900: fc fc fa fb fb fb fb fb fb fb fb fb fb fb fb fb [ 34.538010] ^ [ 34.538866] ffff88800fcae980: fb fb fb fb fb fb fb fc fc fc fc fc fc fc fc fa [ 34.539779] ffff88800fcaea00: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb [ 34.540688] ================================================================== [ 34.541923] Disabling lock debugging due to kernel taint [ 36.700550] BUG: Bad rss-counter state mm:00000000f57288cb type:MM_FILEPAGES val:33 [ 36.701534] BUG: Bad rss-counter state mm:00000000f57288cb type:MM_ANONPAGES val:22 [ 37.156452] BUG: Bad rss-counter state mm:0000000046d5ac34 type:MM_FILEPAGES val:33 [ 37.156994] BUG: Bad rss-counter state mm:0000000046d5ac34 type:MM_ANONPAGES val:22 Warning: Permanently added '[localhost]:26425' (ECDSA) to the list of known hosts. 2023/06/20 01:14:33 fuzzer started 2023/06/20 01:14:33 dialing manager at localhost:44161 2023/06/20 01:14:33 checking machine... 2023/06/20 01:14:33 checking revisions... [ 37.858575] kmemleak: Automatic memory scanning thread ended 2023/06/20 01:14:34 testing simple program... [ 37.918484] cgroup: Unknown subsys name 'net' [ 37.959144] cgroup: Unknown subsys name 'rlimit' executing program executing program executing program VM DIAGNOSIS: 01:14:29 Registers: info registers vcpu 0 RAX=1ffff1100345fe85 RBX=ffff88801a2ff3f8 RCX=ffffffff812e00e5 RDX=0000000000000000 RSI=0000000000000000 RDI=ffff88801a2ff428 RBP=ffff88801a325500 RSP=ffff88806ce09dd8 R8 =0000000000000001 R9 =ffffed100d9c13af R10=0000000000000003 R11=00000000000b6996 R12=dffffc0000000000 R13=ffff88801a38f7e8 R14=ffffffff813782a8 R15=ffff88801a38f7e8 RIP=ffffffff81846362 RFL=00000046 [---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 00007fad8137e900 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=00007fad81935618 CR3=0000000009664000 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=6e69676f6c5f6d61702c78756e696c65 XMM02=755f6d61702c74696d7265705f6d6170 XMM03=2c766e655f6d61702c7374696d696c5f XMM04=6d61702c766e655f6d61702c7374696d XMM05=78696e755f6d61702c74696d7265705f XMM06=6469756e69676f6c5f6d61702c78756e XMM07=672065736f6c635f6e6f69737365733a XMM08=61662029286e65706f5f746964756100 XMM09=00000000000000000000000000000000 XMM10=00000000000000000000000000000000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000 info registers vcpu 1 RAX=ffff88806cf35000 RBX=0000000000000001 RCX=ffffffff8450c50e RDX=ffffed100d9e6a01 RSI=0000000000000004 RDI=ffffffff812889a5 RBP=dffffc0000000000 RSP=ffff888008e27e70 R8 =0000000000000000 R9 =ffffed100d9e6a00 R10=ffff88806cf35003 R11=0000000000000001 R12=ffffffff85d3bed0 R13=1ffff110011c4fd3 R14=0000000000000000 R15=0000000000000000 RIP=ffffffff8450d49f 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=00007ffcb7dd4000 CR3=000000000e93e000 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=2033333a34313a3130203032206e754a XMM01=73732878696e755f6d6170203a5d3932 XMM02=65736f6c63206e6f6973736573203a29 XMM03=755f6d6170203a5d3932325b64687373 XMM04=69662068637573206f4e203a656c6163 XMM05=3a656c696620766e65206e65706f206f XMM06=65733a6468737328766e655f6d617020 XMM07=6b7a79732033333a34313a3130203032 XMM08=3d656e696c646d632022656369767265 XMM09=00000000000000000000000000000000 XMM10=00000000000000000000000000000000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000