syzkaller login: [ 47.414913] BUG: Bad rss-counter state mm:000000004102723c type:MM_FILEPAGES val:33 [ 47.416428] BUG: Bad rss-counter state mm:000000004102723c type:MM_ANONPAGES val:22 [ 47.565734] ================================================================== [ 47.566656] BUG: KASAN: slab-use-after-free in vma_interval_tree_remove+0xc75/0xec0 [ 47.567593] Read of size 8 at addr ffff88800febd798 by task sshd/226 [ 47.568352] [ 47.568679] CPU: 0 PID: 226 Comm: sshd Not tainted 6.4.0-rc7-next-20230619 #1 [ 47.569538] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS 1.12.0-1 04/01/2014 [ 47.570529] Call Trace: [ 47.570862] [ 47.571146] dump_stack_lvl+0x91/0xf0 [ 47.571639] print_report+0xcc/0x620 [ 47.572125] ? __virt_addr_valid+0x102/0x340 [ 47.572673] ? vma_interval_tree_remove+0xc75/0xec0 [ 47.573295] ? vma_interval_tree_remove+0xc75/0xec0 [ 47.573919] kasan_report+0xbe/0xf0 [ 47.574397] ? vma_interval_tree_remove+0xc75/0xec0 [ 47.575021] vma_interval_tree_remove+0xc75/0xec0 [ 47.575620] vma_prepare+0xc54/0x11a0 [ 47.576118] __split_vma+0x5af/0x950 [ 47.576588] ? __pfx___split_vma+0x10/0x10 [ 47.577123] ? find_held_lock+0x2c/0x110 [ 47.577650] do_vmi_align_munmap+0x2ba/0x11f0 [ 47.578235] ? lock_is_held_type+0x9f/0x120 [ 47.578779] ? __pfx_do_vmi_align_munmap+0x10/0x10 [ 47.579395] ? mtree_range_walk+0x632/0x900 [ 47.579948] ? mas_walk+0x5c7/0x7c0 [ 47.580428] do_vmi_munmap+0x1f1/0x2b0 [ 47.580931] mmap_region+0x1f9/0x2660 [ 47.581411] ? vm_mmap_pgoff+0x15c/0x3a0 [ 47.581941] ? __pfx_arch_get_unmapped_area_topdown+0x10/0x10 [ 47.582665] ? __pfx_lock_acquire+0x10/0x10 [ 47.583204] ? __pfx_mmap_region+0x10/0x10 [ 47.583746] ? security_mmap_addr+0x7d/0xa0 [ 47.584286] ? get_unmapped_area+0x1f5/0x3f0 [ 47.584842] do_mmap+0x854/0xf00 [ 47.585285] vm_mmap_pgoff+0x1a6/0x3a0 [ 47.585791] ? __pfx_vm_mmap_pgoff+0x10/0x10 [ 47.586352] ksys_mmap_pgoff+0x3af/0x500 [ 47.586862] do_syscall_64+0x3f/0x90 [ 47.587342] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 47.587987] RIP: 0033:0x7f9d020fdd82 [ 47.588444] 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 [ 47.590597] RSP: 002b:00007ffcba8ac348 EFLAGS: 00000206 ORIG_RAX: 0000000000000009 [ 47.591518] RAX: ffffffffffffffda RBX: 0000000000000812 RCX: 00007f9d020fdd82 [ 47.592376] RDX: 0000000000000005 RSI: 0000000000001000 RDI: 00007f9d01537000 [ 47.593228] RBP: 00007f9d01537000 R08: 0000000000000009 R09: 0000000000001000 [ 47.594086] R10: 0000000000000812 R11: 0000000000000206 R12: 0000561c0ee94d90 [ 47.594927] R13: 00007ffcba8ac360 R14: 00007ffcba8ac390 R15: 00007ffcba8ac6f0 [ 47.595788] [ 47.596079] [ 47.596293] Allocated by task 219: [ 47.596724] kasan_save_stack+0x22/0x50 [ 47.597234] kasan_set_track+0x25/0x30 [ 47.597742] __kasan_slab_alloc+0x59/0x70 [ 47.598271] kmem_cache_alloc+0x16b/0x370 [ 47.598789] vm_area_dup+0x20/0x160 [ 47.599245] __split_vma+0x170/0x950 [ 47.599714] split_vma+0xc6/0x110 [ 47.600161] mprotect_fixup+0x8d2/0xb30 [ 47.600672] do_mprotect_pkey+0x87e/0xd40 [ 47.601193] __x64_sys_mprotect+0x78/0xc0 [ 47.601722] do_syscall_64+0x3f/0x90 [ 47.602213] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 47.602856] [ 47.603075] Freed by task 219: [ 47.603469] kasan_save_stack+0x22/0x50 [ 47.603979] kasan_set_track+0x25/0x30 [ 47.604474] kasan_save_free_info+0x2b/0x50 [ 47.605012] __kasan_slab_free+0x10a/0x190 [ 47.605538] kmem_cache_free+0x10d/0x4d0 [ 47.606060] rcu_core+0x8c8/0x2860 [ 47.606546] __do_softirq+0x1b7/0x7d4 [ 47.607037] [ 47.607253] Last potentially related work creation: [ 47.607848] kasan_save_stack+0x22/0x50 [ 47.608349] __kasan_record_aux_stack+0x8e/0xa0 [ 47.608926] __call_rcu_common.constprop.0+0x6a/0xb90 [ 47.609565] remove_vma+0x139/0x170 [ 47.610034] do_vmi_align_munmap+0xd4a/0x11f0 [ 47.610591] do_vmi_munmap+0x1f1/0x2b0 [ 47.611078] __vm_munmap+0x138/0x3a0 [ 47.611566] __x64_sys_munmap+0x59/0x80 [ 47.612068] do_syscall_64+0x3f/0x90 [ 47.612556] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 47.613200] [ 47.613413] The buggy address belongs to the object at ffff88800febd740 [ 47.613413] which belongs to the cache vm_area_struct of size 168 [ 47.614892] The buggy address is located 88 bytes inside of [ 47.614892] freed 168-byte region [ffff88800febd740, ffff88800febd7e8) [ 47.616297] [ 47.616512] The buggy address belongs to the physical page: [ 47.617187] page:00000000f51f157b refcount:1 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0xfebd [ 47.618292] memcg:ffff88800feb8401 [ 47.618717] anon flags: 0x100000000000200(slab|node=0|zone=1) [ 47.619416] page_type: 0xffffffff() [ 47.619867] raw: 0100000000000200 ffff88800879fc80 ffffea00003fae80 0000000000000005 [ 47.620799] raw: 0000000000000000 0000000000110011 00000001ffffffff ffff88800feb8401 [ 47.621727] page dumped because: kasan: bad access detected [ 47.622389] [ 47.622609] Memory state around the buggy address: [ 47.623191] ffff88800febd680: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb [ 47.624050] ffff88800febd700: fc fc fc fc fc fc fc fc fa fb fb fb fb fb fb fb [ 47.624916] >ffff88800febd780: fb fb fb fb fb fb fb fb fb fb fb fb fb fc fc fc [ 47.625773] ^ [ 47.626265] ffff88800febd800: fc fc fc fc fc 00 00 00 00 00 00 00 00 00 00 00 [ 47.627124] ffff88800febd880: 00 00 00 00 00 00 00 00 00 00 fc fc fc fc fc fc [ 47.627977] ================================================================== [ 47.628954] Disabling lock debugging due to kernel taint [ 49.698488] BUG: Bad rss-counter state mm:00000000132e26e8 type:MM_FILEPAGES val:33 [ 49.699661] BUG: Bad rss-counter state mm:00000000132e26e8 type:MM_ANONPAGES val:22 [ 50.167947] BUG: Bad rss-counter state mm:0000000081bb7413 type:MM_FILEPAGES val:33 [ 50.169123] BUG: Bad rss-counter state mm:0000000081bb7413 type:MM_ANONPAGES val:22 Warning: Permanently added '[localhost]:56476' (ECDSA) to the list of known hosts. 2023/06/19 23:12:54 fuzzer started 2023/06/19 23:12:54 dialing manager at localhost:44161 2023/06/19 23:12:54 checking machine... 2023/06/19 23:12:54 checking revisions... [ 50.797547] kmemleak: Automatic memory scanning thread ended 2023/06/19 23:12:55 testing simple program... [ 50.836924] cgroup: Unknown subsys name 'net' [ 50.890279] cgroup: Unknown subsys name 'rlimit' executing program executing program executing program VM DIAGNOSIS: 23:12:45 Registers: info registers vcpu 0 RAX=0000000080000000 RBX=00007ff45d156d00 RCX=0000000080000000 RDX=ffff88800dc0b680 RSI=ffffffff813a0ad6 RDI=0000000000000001 RBP=ffffffffffffffff RSP=ffff88800e23fa20 R8 =0000000000000001 R9 =0000000000000000 R10=0000000000000000 R11=00000000000b6996 R12=0000000000000000 R13=0000000000000000 R14=ffff88800dc0b680 R15=ffff88800f01cf00 RIP=ffffffff814c07f1 RFL=00000246 [---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 00007ff45cc6f900 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=00007ff45d2270b0 CR3=0000000008dc6000 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=ffffffffffffffffffffffff00000000 XMM01=000000000000000000005500746f6f72 XMM02=00000000000000000000000000000000 XMM03=5320444f4854454d5f54505952434e45 XMM04=40404040404040404040404040404040 XMM05=5a5a5a5a5a5a5a5a5a5a5a5a5a5a5a5a XMM06=20202020202020202020202020202020 XMM07=00000000000000000000000000000000 XMM08=2f3a746f6f723a303a303a3a746f6f72 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=00007ffd613273c8 CR3=000000000c520000 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=2034353a32313a3332203931206e754a XMM01=73732878696e755f6d6170203a5d3633 XMM02=65736f6c63206e6f6973736573203a29 XMM03=755f6d6170203a5d3633325b64687373 XMM04=69662068637573206f4e203a656c6163 XMM05=3a656c696620766e65206e65706f206f XMM06=65733a6468737328766e655f6d617020 XMM07=6b7a79732034353a32313a3332203931 XMM08=3d656e696c646d632022656369767265 XMM09=00000000000000000000000000000000 XMM10=00000000000000000000000000000000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000