syzkaller login: [ 40.535491] BUG: Bad rss-counter state mm:00000000ad405076 type:MM_FILEPAGES val:33 [ 40.536509] BUG: Bad rss-counter state mm:00000000ad405076 type:MM_ANONPAGES val:22 [ 40.679159] ================================================================== [ 40.679797] BUG: KASAN: slab-use-after-free in vma_interval_tree_remove+0xc75/0xec0 [ 40.680418] Read of size 8 at addr ffff88801908a6b0 by task sshd/221 [ 40.680916] [ 40.681060] CPU: 1 PID: 221 Comm: sshd Not tainted 6.4.0-rc7-next-20230619 #1 [ 40.681624] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS 1.12.0-1 04/01/2014 [ 40.682254] Call Trace: [ 40.682459] [ 40.682643] dump_stack_lvl+0x91/0xf0 [ 40.682965] print_report+0xcc/0x620 [ 40.683281] ? __virt_addr_valid+0x102/0x340 [ 40.683780] ? vma_interval_tree_remove+0xc75/0xec0 [ 40.684254] ? vma_interval_tree_remove+0xc75/0xec0 [ 40.684678] kasan_report+0xbe/0xf0 [ 40.684996] ? vma_interval_tree_remove+0xc75/0xec0 [ 40.685403] vma_interval_tree_remove+0xc75/0xec0 [ 40.685794] vma_prepare+0xc54/0x11a0 [ 40.686137] __split_vma+0x5af/0x950 [ 40.686453] ? __pfx___split_vma+0x10/0x10 [ 40.686813] ? find_held_lock+0x2c/0x110 [ 40.687159] do_vmi_align_munmap+0x2ba/0x11f0 [ 40.687540] ? lock_is_held_type+0x9f/0x120 [ 40.687900] ? __pfx_do_vmi_align_munmap+0x10/0x10 [ 40.688301] ? mtree_range_walk+0x632/0x900 [ 40.688677] ? mas_walk+0x5c7/0x7c0 [ 40.688986] do_vmi_munmap+0x1f1/0x2b0 [ 40.689315] mmap_region+0x1f9/0x2660 [ 40.689629] ? vm_mmap_pgoff+0x15c/0x3a0 [ 40.689969] ? __pfx_arch_get_unmapped_area_topdown+0x10/0x10 [ 40.690443] ? __pfx_lock_acquire+0x10/0x10 [ 40.690798] ? __pfx_mmap_region+0x10/0x10 [ 40.691157] ? security_mmap_addr+0x7d/0xa0 [ 40.691510] ? get_unmapped_area+0x1f5/0x3f0 [ 40.691868] do_mmap+0x854/0xf00 [ 40.692163] vm_mmap_pgoff+0x1a6/0x3a0 [ 40.692511] ? __pfx_vm_mmap_pgoff+0x10/0x10 [ 40.692882] ksys_mmap_pgoff+0x3af/0x500 [ 40.693224] do_syscall_64+0x3f/0x90 [ 40.693546] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 40.693979] RIP: 0033:0x7f83d4978d82 [ 40.694288] 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 [ 40.695675] RSP: 002b:00007ffd92bc6348 EFLAGS: 00000206 ORIG_RAX: 0000000000000009 [ 40.696278] RAX: ffffffffffffffda RBX: 0000000000000812 RCX: 00007f83d4978d82 [ 40.696876] RDX: 0000000000000005 RSI: 0000000000001000 RDI: 00007f83d3db2000 [ 40.697435] RBP: 00007f83d3db2000 R08: 0000000000000009 R09: 0000000000001000 [ 40.697992] R10: 0000000000000812 R11: 0000000000000206 R12: 0000561fb28a5d90 [ 40.698553] R13: 00007ffd92bc6360 R14: 00007ffd92bc6390 R15: 00007ffd92bc66f0 [ 40.699119] [ 40.699315] [ 40.699461] Allocated by task 214: [ 40.699747] kasan_save_stack+0x22/0x50 [ 40.700093] kasan_set_track+0x25/0x30 [ 40.700437] __kasan_slab_alloc+0x59/0x70 [ 40.700780] kmem_cache_alloc+0x16b/0x370 [ 40.701115] vm_area_dup+0x20/0x160 [ 40.701420] __split_vma+0x170/0x950 [ 40.701737] split_vma+0xc6/0x110 [ 40.702027] mprotect_fixup+0x8d2/0xb30 [ 40.702363] do_mprotect_pkey+0x87e/0xd40 [ 40.702712] __x64_sys_mprotect+0x78/0xc0 [ 40.703063] do_syscall_64+0x3f/0x90 [ 40.703383] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 40.703804] [ 40.703944] Freed by task 214: [ 40.704202] kasan_save_stack+0x22/0x50 [ 40.704555] kasan_set_track+0x25/0x30 [ 40.704878] kasan_save_free_info+0x2b/0x50 [ 40.705243] __kasan_slab_free+0x10a/0x190 [ 40.705612] kmem_cache_free+0x10d/0x4d0 [ 40.705956] rcu_core+0x8c8/0x2860 [ 40.706257] __do_softirq+0x1b7/0x7d4 [ 40.706576] [ 40.706723] Last potentially related work creation: [ 40.707107] kasan_save_stack+0x22/0x50 [ 40.707442] __kasan_record_aux_stack+0x8e/0xa0 [ 40.707823] __call_rcu_common.constprop.0+0x6a/0xb90 [ 40.708258] remove_vma+0x139/0x170 [ 40.708603] do_vmi_align_munmap+0xd4a/0x11f0 [ 40.708973] do_vmi_munmap+0x1f1/0x2b0 [ 40.709305] __vm_munmap+0x138/0x3a0 [ 40.709615] __x64_sys_munmap+0x59/0x80 [ 40.709936] do_syscall_64+0x3f/0x90 [ 40.710236] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 40.710662] [ 40.710805] The buggy address belongs to the object at ffff88801908a658 [ 40.710805] which belongs to the cache vm_area_struct of size 168 [ 40.711764] The buggy address is located 88 bytes inside of [ 40.711764] freed 168-byte region [ffff88801908a658, ffff88801908a700) [ 40.712701] [ 40.712845] The buggy address belongs to the physical page: [ 40.713278] page:0000000025834042 refcount:1 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0x1908a [ 40.714000] memcg:ffff888014253d01 [ 40.714282] flags: 0x100000000000200(slab|node=0|zone=1) [ 40.714705] page_type: 0xffffffff() [ 40.715005] raw: 0100000000000200 ffff88800879fc80 dead000000000122 0000000000000000 [ 40.715607] raw: 0000000000000000 0000000000110011 00000001ffffffff ffff888014253d01 [ 40.716200] page dumped because: kasan: bad access detected [ 40.716642] [ 40.716916] Memory state around the buggy address: [ 40.717305] ffff88801908a580: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 [ 40.717876] ffff88801908a600: 00 00 00 fc fc fc fc fc fc fc fc fa fb fb fb fb [ 40.718446] >ffff88801908a680: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb [ 40.718992] ^ [ 40.719353] ffff88801908a700: fc fc fc fc fc fc fc fc fa fb fb fb fb fb fb fb [ 40.719888] ffff88801908a780: fb fb fb fb fb fb fb fb fb fb fb fb fb fc fc fc [ 40.720442] ================================================================== [ 40.721079] Disabling lock debugging due to kernel taint [ 42.366542] BUG: Bad rss-counter state mm:00000000237155c4 type:MM_FILEPAGES val:33 [ 42.367310] BUG: Bad rss-counter state mm:00000000237155c4 type:MM_ANONPAGES val:22 [ 42.658624] BUG: Bad rss-counter state mm:0000000032a974bb type:MM_FILEPAGES val:33 [ 42.659293] BUG: Bad rss-counter state mm:0000000032a974bb type:MM_ANONPAGES val:22 Warning: Permanently added '[localhost]:40328' (ECDSA) to the list of known hosts. 2023/06/20 08:35:54 fuzzer started 2023/06/20 08:35:54 dialing manager at localhost:44161 2023/06/20 08:35:54 checking machine... 2023/06/20 08:35:54 checking revisions... [ 43.204158] kmemleak: Automatic memory scanning thread ended 2023/06/20 08:35:54 testing simple program... [ 43.243645] cgroup: Unknown subsys name 'net' [ 43.282506] cgroup: Unknown subsys name 'rlimit' executing program executing program executing program VM DIAGNOSIS: 08:35:44 Registers: info registers vcpu 0 RAX=ffff88806ce35000 RBX=0000000000000000 RCX=ffffffff8450c50e RDX=ffffed100d9c6a01 RSI=0000000000000004 RDI=ffffffff812889a5 RBP=dffffc0000000000 RSP=ffffffff85407e10 R8 =0000000000000000 R9 =ffffed100d9c6a00 R10=ffff88806ce35003 R11=ffff888008c58000 R12=ffffffff85d3bed0 R13=1ffffffff0a80fc7 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 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=00007fcc99c9a290 CR3=000000000c8ba000 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=2033353a35333a3830203032206e754a XMM01=73732878696e755f6d6170203a5d3133 XMM02=65736f6c63206e6f6973736573203a29 XMM03=755f6d6170203a5d3133325b64687373 XMM04=69662068637573206f4e203a656c6163 XMM05=3a656c696620766e65206e65706f206f XMM06=65733a6468737328766e655f6d617020 XMM07=6b7a79732033353a35333a3830203032 XMM08=3d656e696c646d632022656369767265 XMM09=00000000000000000000000000000000 XMM10=00000000000000000000000000000000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000 info registers vcpu 1 RAX=ffff88800f9a8001 RBX=0000000000000001 RCX=0000000000000001 RDX=ffff88800f9a7401 RSI=ffff88800f9a74d8 RDI=ffff88800f9a7168 RBP=ffff88800f9a74d8 RSP=ffff88800f9a70c0 R8 =ffffffff864a875c R9 =ffff88800f9a7198 R10=0000000000038001 R11=00000000000b3b3c R12=0000000000000008 R13=ffff88800f9a0000 R14=ffff88800f9a74e0 R15=ffff88800f9a7158 RIP=ffffffff811304ce RFL=00000286 [--S--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 00007fd094c30900 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=00007fd094bf5008 CR3=0000000016dac000 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=652022746f6f72223d74636361207469 XMM02=3d6c616e696d72657420322e322e302e XMM03=3d656d616e74736f682022646873732f XMM04=40404040404040404040404040404040 XMM05=5a5a5a5a5a5a5a5a5a5a5a5a5a5a5a5a XMM06=20202020202020202020202020202020 XMM07=00000000000000000000000000000000 XMM08=652075253d64692073253d706f000000 XMM09=00000000000000000000000000000000 XMM10=00000000000000000000000000000000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000