syzkaller login: [ 32.157923] BUG: Bad rss-counter state mm:00000000f4e36332 type:MM_FILEPAGES val:33 [ 32.159269] BUG: Bad rss-counter state mm:00000000f4e36332 type:MM_ANONPAGES val:22 [ 32.320058] ================================================================== [ 32.320906] BUG: KASAN: slab-use-after-free in vma_interval_tree_remove+0xc75/0xec0 [ 32.321788] Read of size 8 at addr ffff88800f0c7798 by task sshd/220 [ 32.322528] [ 32.322735] CPU: 1 PID: 220 Comm: sshd Not tainted 6.4.0-rc7-next-20230619 #1 [ 32.323557] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS 1.12.0-1 04/01/2014 [ 32.324464] Call Trace: [ 32.324765] [ 32.325040] dump_stack_lvl+0x91/0xf0 [ 32.325513] print_report+0xcc/0x620 [ 32.325974] ? __virt_addr_valid+0x102/0x340 [ 32.326551] ? vma_interval_tree_remove+0xc75/0xec0 [ 32.327351] ? vma_interval_tree_remove+0xc75/0xec0 [ 32.328084] kasan_report+0xbe/0xf0 [ 32.328643] ? vma_interval_tree_remove+0xc75/0xec0 [ 32.329388] vma_interval_tree_remove+0xc75/0xec0 [ 32.330103] vma_prepare+0xc54/0x11a0 [ 32.330667] __split_vma+0x5af/0x950 [ 32.331226] ? __pfx___split_vma+0x10/0x10 [ 32.331852] ? find_held_lock+0x2c/0x110 [ 32.332463] do_vmi_align_munmap+0x2ba/0x11f0 [ 32.333130] ? lock_is_held_type+0x9f/0x120 [ 32.333775] ? __pfx_do_vmi_align_munmap+0x10/0x10 [ 32.334494] ? mtree_range_walk+0x632/0x900 [ 32.335144] ? mas_walk+0x5c7/0x7c0 [ 32.335700] do_vmi_munmap+0x1f1/0x2b0 [ 32.336282] mmap_region+0x1f9/0x2660 [ 32.336853] ? vm_mmap_pgoff+0x15c/0x3a0 [ 32.337477] ? __pfx_arch_get_unmapped_area_topdown+0x10/0x10 [ 32.338322] ? __pfx_lock_acquire+0x10/0x10 [ 32.338954] ? __pfx_mmap_region+0x10/0x10 [ 32.339580] ? security_mmap_addr+0x7d/0xa0 [ 32.340209] ? get_unmapped_area+0x1f5/0x3f0 [ 32.340861] do_mmap+0x854/0xf00 [ 32.341386] vm_mmap_pgoff+0x1a6/0x3a0 [ 32.341973] ? __pfx_vm_mmap_pgoff+0x10/0x10 [ 32.342633] ksys_mmap_pgoff+0x3af/0x500 [ 32.343233] do_syscall_64+0x3f/0x90 [ 32.343796] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 32.344563] RIP: 0033:0x7f37d7592d82 [ 32.345102] 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 [ 32.347639] RSP: 002b:00007fff036b96e8 EFLAGS: 00000206 ORIG_RAX: 0000000000000009 [ 32.348709] RAX: ffffffffffffffda RBX: 0000000000000812 RCX: 00007f37d7592d82 [ 32.349714] RDX: 0000000000000005 RSI: 0000000000001000 RDI: 00007f37d69cc000 [ 32.350716] RBP: 00007f37d69cc000 R08: 0000000000000009 R09: 0000000000001000 [ 32.351714] R10: 0000000000000812 R11: 0000000000000206 R12: 0000556f84fe0f70 [ 32.352715] R13: 00007fff036b9700 R14: 00007fff036b9730 R15: 00007fff036b9a90 [ 32.353739] [ 32.354082] [ 32.354335] Allocated by task 213: [ 32.354841] kasan_save_stack+0x22/0x50 [ 32.355438] kasan_set_track+0x25/0x30 [ 32.356026] __kasan_slab_alloc+0x59/0x70 [ 32.356646] kmem_cache_alloc+0x16b/0x370 [ 32.357273] vm_area_dup+0x20/0x160 [ 32.357811] __split_vma+0x170/0x950 [ 32.358442] split_vma+0xc6/0x110 [ 32.358961] mprotect_fixup+0x8d2/0xb30 [ 32.359552] do_mprotect_pkey+0x87e/0xd40 [ 32.360166] __x64_sys_mprotect+0x78/0xc0 [ 32.360783] do_syscall_64+0x3f/0x90 [ 32.361351] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 32.362110] [ 32.362361] Freed by task 213: [ 32.362823] kasan_save_stack+0x22/0x50 [ 32.363419] kasan_set_track+0x25/0x30 [ 32.364019] kasan_save_free_info+0x2b/0x50 [ 32.364687] __kasan_slab_free+0x10a/0x190 [ 32.365350] kmem_cache_free+0x10d/0x4d0 [ 32.365952] rcu_core+0x8c8/0x2860 [ 32.366476] __do_softirq+0x1b7/0x7d4 [ 32.367041] [ 32.367293] Last potentially related work creation: [ 32.367989] kasan_save_stack+0x22/0x50 [ 32.368583] __kasan_record_aux_stack+0x8e/0xa0 [ 32.369271] __call_rcu_common.constprop.0+0x6a/0xb90 [ 32.370031] remove_vma+0x139/0x170 [ 32.370563] do_vmi_align_munmap+0xd4a/0x11f0 [ 32.371223] do_vmi_munmap+0x1f1/0x2b0 [ 32.371797] __vm_munmap+0x138/0x3a0 [ 32.372352] __x64_sys_munmap+0x59/0x80 [ 32.372939] do_syscall_64+0x3f/0x90 [ 32.373505] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 32.374266] [ 32.374517] Second to last potentially related work creation: [ 32.375327] kasan_save_stack+0x22/0x50 [ 32.375919] __kasan_record_aux_stack+0x8e/0xa0 [ 32.376598] __call_rcu_common.constprop.0+0x6a/0xb90 [ 32.377374] remove_vma+0x139/0x170 [ 32.377907] do_vmi_align_munmap+0xd4a/0x11f0 [ 32.378565] do_vmi_munmap+0x1f1/0x2b0 [ 32.379140] mmap_region+0x1f9/0x2660 [ 32.379703] do_mmap+0x854/0xf00 [ 32.380210] vm_mmap_pgoff+0x1a6/0x3a0 [ 32.380782] ksys_mmap_pgoff+0x3af/0x500 [ 32.381392] do_syscall_64+0x3f/0x90 [ 32.381952] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 32.382712] [ 32.382965] The buggy address belongs to the object at ffff88800f0c7740 [ 32.382965] which belongs to the cache vm_area_struct of size 168 [ 32.384712] The buggy address is located 88 bytes inside of [ 32.384712] freed 168-byte region [ffff88800f0c7740, ffff88800f0c77e8) [ 32.386398] [ 32.386651] The buggy address belongs to the physical page: [ 32.387428] page:000000006a3c4589 refcount:1 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0xf0c7 [ 32.388712] memcg:ffff88800e7f3501 [ 32.389221] anon flags: 0x100000000000200(slab|node=0|zone=1) [ 32.390050] page_type: 0xffffffff() [ 32.390581] raw: 0100000000000200 ffff88800879fc80 ffffea0000682880 dead000000000007 [ 32.391673] raw: 0000000000000000 0000000000110011 00000001ffffffff ffff88800e7f3501 [ 32.392748] page dumped because: kasan: bad access detected [ 32.393540] [ 32.393794] Memory state around the buggy address: [ 32.394482] ffff88800f0c7680: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 [ 32.395494] ffff88800f0c7700: fc fc fc fc fc fc fc fc fa fb fb fb fb fb fb fb [ 32.396504] >ffff88800f0c7780: fb fb fb fb fb fb fb fb fb fb fb fb fb fc fc fc [ 32.397531] ^ [ 32.398115] ffff88800f0c7800: fc fc fc fc fc 00 00 00 00 00 00 00 00 00 00 00 [ 32.399127] ffff88800f0c7880: 00 00 00 00 00 00 00 00 00 00 fc fc fc fc fc fc [ 32.400134] ================================================================== [ 32.401336] Disabling lock debugging due to kernel taint [ 34.264824] BUG: Bad rss-counter state mm:00000000c9e7e2a6 type:MM_FILEPAGES val:33 [ 34.265632] BUG: Bad rss-counter state mm:00000000c9e7e2a6 type:MM_ANONPAGES val:22 [ 34.727401] BUG: Bad rss-counter state mm:000000002301d49d type:MM_FILEPAGES val:33 [ 34.728920] BUG: Bad rss-counter state mm:000000002301d49d type:MM_ANONPAGES val:22 Warning: Permanently added '[localhost]:36714' (ECDSA) to the list of known hosts. 2023/06/19 21:00:58 fuzzer started 2023/06/19 21:00:59 dialing manager at localhost:44161 2023/06/19 21:00:59 checking machine... 2023/06/19 21:00:59 checking revisions... [ 35.406825] kmemleak: Automatic memory scanning thread ended 2023/06/19 21:00:59 testing simple program... [ 35.456113] cgroup: Unknown subsys name 'net' [ 35.506415] cgroup: Unknown subsys name 'rlimit' executing program executing program executing program VM DIAGNOSIS: 21:00:57 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=00007f98725b0470 CR3=000000000d996000 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=cb2d3ef25975cab1394a363871cbf776 XMM02=2c67c8bc2e329bc3000000000011dc18 XMM03=fb795ef6d65770560000000000124618 XMM04=7c77cd7eafa4d69e00000000000ae988 XMM05=19e9129bd510f23500000000001357c8 XMM06=74c5f0ba42572e470000000000134630 XMM07=e042d86d42eb936e0000000000124898 XMM08=ca659f9401ee64e9000000000011dc78 XMM09=00000000000000000000000000000000 XMM10=00000000000000000000000000000000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000 info registers vcpu 1 RAX=0000000000000000 RBX=0000000000000009 RCX=ffffffff8449307d RDX=00007f044b8eefff RSI=0000000000000000 RDI=0000000000000006 RBP=000000000000000a RSP=ffff888019a173e0 R8 =0000000000000006 R9 =00007f044b8defff R10=00007f044b8eefff R11=00000000000b6996 R12=ffff888019a17768 R13=ffff88800dfed050 R14=00007f044b8defff R15=0000000000000009 RIP=ffffffff84493082 RFL=00000293 [--S-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 00007f044b911900 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=00007f044b8f0020 CR3=000000001bc52000 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