syzkaller login: [ 42.406520] BUG: Bad rss-counter state mm:00000000e362221e type:MM_FILEPAGES val:33 [ 42.407971] BUG: Bad rss-counter state mm:00000000e362221e type:MM_ANONPAGES val:22 [ 42.578527] ================================================================== [ 42.579727] BUG: KASAN: slab-use-after-free in vma_interval_tree_remove+0xc75/0xec0 [ 42.580682] Read of size 8 at addr ffff888019e19228 by task sshd/219 [ 42.581459] [ 42.581673] CPU: 0 PID: 219 Comm: sshd Not tainted 6.4.0-rc7-next-20230619 #1 [ 42.582541] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS 1.12.0-1 04/01/2014 [ 42.583538] Call Trace: [ 42.583860] [ 42.584151] dump_stack_lvl+0x91/0xf0 [ 42.584648] print_report+0xcc/0x620 [ 42.585137] ? __virt_addr_valid+0x102/0x340 [ 42.585699] ? vma_interval_tree_remove+0xc75/0xec0 [ 42.586316] ? vma_interval_tree_remove+0xc75/0xec0 [ 42.586950] kasan_report+0xbe/0xf0 [ 42.587438] ? vma_interval_tree_remove+0xc75/0xec0 [ 42.588073] vma_interval_tree_remove+0xc75/0xec0 [ 42.588693] vma_prepare+0xc54/0x11a0 [ 42.589214] __split_vma+0x5af/0x950 [ 42.589693] ? __pfx___split_vma+0x10/0x10 [ 42.590235] ? find_held_lock+0x2c/0x110 [ 42.590780] do_vmi_align_munmap+0x2ba/0x11f0 [ 42.591389] ? lock_is_held_type+0x9f/0x120 [ 42.591944] ? __pfx_do_vmi_align_munmap+0x10/0x10 [ 42.592573] ? mtree_range_walk+0x632/0x900 [ 42.593130] ? mas_walk+0x5c7/0x7c0 [ 42.593610] do_vmi_munmap+0x1f1/0x2b0 [ 42.594119] mmap_region+0x1f9/0x2660 [ 42.594618] ? vm_mmap_pgoff+0x15c/0x3a0 [ 42.595143] ? __pfx_arch_get_unmapped_area_topdown+0x10/0x10 [ 42.595874] ? __pfx_lock_acquire+0x10/0x10 [ 42.596425] ? __pfx_mmap_region+0x10/0x10 [ 42.596970] ? security_mmap_addr+0x7d/0xa0 [ 42.597518] ? get_unmapped_area+0x1f5/0x3f0 [ 42.598079] do_mmap+0x854/0xf00 [ 42.598531] vm_mmap_pgoff+0x1a6/0x3a0 [ 42.599054] ? __pfx_vm_mmap_pgoff+0x10/0x10 [ 42.599628] ksys_mmap_pgoff+0x3af/0x500 [ 42.600148] do_syscall_64+0x3f/0x90 [ 42.600635] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 42.601291] RIP: 0033:0x7fa5c6a69d82 [ 42.601754] 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 [ 42.603945] RSP: 002b:00007ffe717779b8 EFLAGS: 00000206 ORIG_RAX: 0000000000000009 [ 42.604885] RAX: ffffffffffffffda RBX: 0000000000000812 RCX: 00007fa5c6a69d82 [ 42.605769] RDX: 0000000000000005 RSI: 0000000000001000 RDI: 00007fa5c5ea3000 [ 42.606639] RBP: 00007fa5c5ea3000 R08: 0000000000000009 R09: 0000000000001000 [ 42.607524] R10: 0000000000000812 R11: 0000000000000206 R12: 000055d349ca9f60 [ 42.608394] R13: 00007ffe717779d0 R14: 00007ffe71777a00 R15: 00007ffe71777d60 [ 42.609284] [ 42.609579] [ 42.609802] Allocated by task 212: [ 42.610246] kasan_save_stack+0x22/0x50 [ 42.610760] kasan_set_track+0x25/0x30 [ 42.611270] __kasan_slab_alloc+0x59/0x70 [ 42.611811] kmem_cache_alloc+0x16b/0x370 [ 42.612338] vm_area_dup+0x20/0x160 [ 42.612808] __split_vma+0x170/0x950 [ 42.613288] split_vma+0xc6/0x110 [ 42.613745] mprotect_fixup+0x8d2/0xb30 [ 42.614263] do_mprotect_pkey+0x87e/0xd40 [ 42.614800] __x64_sys_mprotect+0x78/0xc0 [ 42.615345] do_syscall_64+0x3f/0x90 [ 42.615838] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 42.616501] [ 42.616721] Freed by task 212: [ 42.617123] kasan_save_stack+0x22/0x50 [ 42.617640] kasan_set_track+0x25/0x30 [ 42.618151] kasan_save_free_info+0x2b/0x50 [ 42.618696] __kasan_slab_free+0x10a/0x190 [ 42.619261] kmem_cache_free+0x10d/0x4d0 [ 42.619779] rcu_core+0x8c8/0x2860 [ 42.620237] __do_softirq+0x1b7/0x7d4 [ 42.620721] [ 42.620946] Last potentially related work creation: [ 42.621558] kasan_save_stack+0x22/0x50 [ 42.622081] __kasan_record_aux_stack+0x8e/0xa0 [ 42.622677] __call_rcu_common.constprop.0+0x6a/0xb90 [ 42.623347] remove_vma+0x139/0x170 [ 42.623814] do_vmi_align_munmap+0xd4a/0x11f0 [ 42.624399] do_vmi_munmap+0x1f1/0x2b0 [ 42.624886] __vm_munmap+0x138/0x3a0 [ 42.625373] __x64_sys_munmap+0x59/0x80 [ 42.625884] do_syscall_64+0x3f/0x90 [ 42.626370] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 42.627061] [ 42.627285] The buggy address belongs to the object at ffff888019e191d0 [ 42.627285] which belongs to the cache vm_area_struct of size 168 [ 42.628776] The buggy address is located 88 bytes inside of [ 42.628776] freed 168-byte region [ffff888019e191d0, ffff888019e19278) [ 42.630234] [ 42.630460] The buggy address belongs to the physical page: [ 42.631147] page:000000005025d73a refcount:1 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0x19e19 [ 42.632272] memcg:ffff888016e08e01 [ 42.632697] anon flags: 0x100000000000200(slab|node=0|zone=1) [ 42.633413] page_type: 0xffffffff() [ 42.633880] raw: 0100000000000200 ffff88800879fc80 ffffea00003556c0 dead000000000007 [ 42.634835] raw: 0000000000000000 0000000000110011 00000001ffffffff ffff888016e08e01 [ 42.635782] page dumped because: kasan: bad access detected [ 42.636451] [ 42.636671] Memory state around the buggy address: [ 42.637255] ffff888019e19100: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb [ 42.638164] ffff888019e19180: fb fb fc fc fc fc fc fc fc fc fa fb fb fb fb fb [ 42.639050] >ffff888019e19200: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fc [ 42.639911] ^ [ 42.640474] ffff888019e19280: fc fc fc fc fc fc fc 00 00 00 00 00 00 00 00 00 [ 42.641345] ffff888019e19300: 00 00 00 00 00 00 00 00 00 00 00 00 fc fc fc fc [ 42.642218] ================================================================== [ 42.643225] Disabling lock debugging due to kernel taint [ 44.491355] BUG: Bad rss-counter state mm:00000000e97669ee type:MM_FILEPAGES val:33 [ 44.492028] BUG: Bad rss-counter state mm:00000000e97669ee type:MM_ANONPAGES val:22 [ 44.889240] BUG: Bad rss-counter state mm:00000000606ae81a type:MM_FILEPAGES val:33 [ 44.890395] BUG: Bad rss-counter state mm:00000000606ae81a type:MM_ANONPAGES val:22 Warning: Permanently added '[localhost]:9003' (ECDSA) to the list of known hosts. 2023/06/19 13:13:44 fuzzer started 2023/06/19 13:13:44 dialing manager at localhost:44161 2023/06/19 13:13:44 checking machine... 2023/06/19 13:13:44 checking revisions... [ 45.661852] kmemleak: Automatic memory scanning thread ended 2023/06/19 13:13:44 testing simple program... [ 45.722964] cgroup: Unknown subsys name 'net' [ 45.761330] cgroup: Unknown subsys name 'rlimit' executing program executing program executing program VM DIAGNOSIS: 13:13:32 Registers: info registers vcpu 0 RAX=0000000000000000 RBX=0000000000000002 RCX=ffffffff813782a7 RDX=dffffc0000000000 RSI=ffffffff813782a8 RDI=ffff88806ce09a78 RBP=ffff88806ce09ad0 RSP=ffff88806ce09a08 R8 =0000000000000001 R9 =ffff88806ce09ab8 R10=0000000000038001 R11=00000000000244c3 R12=ffff88806ce09ad8 R13=ffff88806ce09ac0 R14=ffff88806ce09ab9 R15=ffff88806ce09a78 RIP=ffffffff81130719 RFL=00000282 [--S----] 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 00007f72fdb25900 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=00007f72fe0dc618 CR3=000000000d9a8000 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=ffff888008c58400 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=00007fe085e6b1b0 CR3=000000000d6fe000 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=f7070ff98d0631bdbb4912d9e08b893d XMM02=000000000011e288ec2efd57dc4c00df XMM03=000000000012449089da711ae7e8e8cc XMM04=b8ac59eab89d84b900000000000ae988 XMM05=dfcdbad4f1609c370000000000133cc0 XMM06=64d3dd5af61ab8380000000000132e98 XMM07=e042d86d42eb936e0000000000124710 XMM08=89da711ae7e8e8cc000000000011e2e8 XMM09=00000000000000000000000000000000 XMM10=20200000000020202020202020200000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000