syzkaller login: [ 40.499227] BUG: Bad rss-counter state mm:000000004898bd53 type:MM_FILEPAGES val:33 [ 40.500335] BUG: Bad rss-counter state mm:000000004898bd53 type:MM_ANONPAGES val:22 [ 40.675420] ================================================================== [ 40.676321] BUG: KASAN: slab-use-after-free in vma_interval_tree_remove+0xc75/0xec0 [ 40.677334] Read of size 8 at addr ffff88800fe4a4e0 by task sshd/219 [ 40.678181] [ 40.678413] CPU: 1 PID: 219 Comm: sshd Not tainted 6.4.0-rc7-next-20230619 #1 [ 40.679435] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS 1.12.0-1 04/01/2014 [ 40.680459] Call Trace: [ 40.680830] [ 40.681157] dump_stack_lvl+0x91/0xf0 [ 40.681666] print_report+0xcc/0x620 [ 40.682153] ? __virt_addr_valid+0x102/0x340 [ 40.682727] ? vma_interval_tree_remove+0xc75/0xec0 [ 40.683365] ? vma_interval_tree_remove+0xc75/0xec0 [ 40.683976] kasan_report+0xbe/0xf0 [ 40.684458] ? vma_interval_tree_remove+0xc75/0xec0 [ 40.685127] vma_interval_tree_remove+0xc75/0xec0 [ 40.685777] vma_prepare+0xc54/0x11a0 [ 40.686287] __split_vma+0x5af/0x950 [ 40.686775] ? __pfx___split_vma+0x10/0x10 [ 40.687305] ? find_held_lock+0x2c/0x110 [ 40.687829] do_vmi_align_munmap+0x2ba/0x11f0 [ 40.688390] ? lock_is_held_type+0x9f/0x120 [ 40.688979] ? __pfx_do_vmi_align_munmap+0x10/0x10 [ 40.689636] ? mtree_range_walk+0x632/0x900 [ 40.690196] ? mas_walk+0x5c7/0x7c0 [ 40.690671] do_vmi_munmap+0x1f1/0x2b0 [ 40.691165] mmap_region+0x1f9/0x2660 [ 40.691673] ? vm_mmap_pgoff+0x15c/0x3a0 [ 40.692215] ? __pfx_arch_get_unmapped_area_topdown+0x10/0x10 [ 40.692987] ? __pfx_lock_acquire+0x10/0x10 [ 40.693537] ? __pfx_mmap_region+0x10/0x10 [ 40.694069] ? security_mmap_addr+0x7d/0xa0 [ 40.694593] ? get_unmapped_area+0x1f5/0x3f0 [ 40.695145] do_mmap+0x854/0xf00 [ 40.695585] vm_mmap_pgoff+0x1a6/0x3a0 [ 40.696093] ? __pfx_vm_mmap_pgoff+0x10/0x10 [ 40.696677] ksys_mmap_pgoff+0x3af/0x500 [ 40.697241] do_syscall_64+0x3f/0x90 [ 40.697749] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 40.698392] RIP: 0033:0x7fc177e22d82 [ 40.698875] 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 [ 40.701138] RSP: 002b:00007ffc67a57f18 EFLAGS: 00000206 ORIG_RAX: 0000000000000009 [ 40.702131] RAX: ffffffffffffffda RBX: 0000000000000812 RCX: 00007fc177e22d82 [ 40.702973] RDX: 0000000000000005 RSI: 0000000000001000 RDI: 00007fc17725c000 [ 40.703817] RBP: 00007fc17725c000 R08: 0000000000000009 R09: 0000000000001000 [ 40.704663] R10: 0000000000000812 R11: 0000000000000206 R12: 0000563ebb4f9f70 [ 40.705519] R13: 00007ffc67a57f30 R14: 00007ffc67a57f60 R15: 00007ffc67a582c0 [ 40.706412] [ 40.706703] [ 40.706916] Allocated by task 212: [ 40.707346] kasan_save_stack+0x22/0x50 [ 40.707851] kasan_set_track+0x25/0x30 [ 40.708353] __kasan_slab_alloc+0x59/0x70 [ 40.708909] kmem_cache_alloc+0x16b/0x370 [ 40.709436] vm_area_dup+0x20/0x160 [ 40.709944] __split_vma+0x170/0x950 [ 40.710416] split_vma+0xc6/0x110 [ 40.710853] mprotect_fixup+0x8d2/0xb30 [ 40.711359] do_mprotect_pkey+0x87e/0xd40 [ 40.711922] __x64_sys_mprotect+0x78/0xc0 [ 40.712474] do_syscall_64+0x3f/0x90 [ 40.712948] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 40.713606] [ 40.713824] Freed by task 203: [ 40.714191] kasan_save_stack+0x22/0x50 [ 40.714669] kasan_set_track+0x25/0x30 [ 40.715142] kasan_save_free_info+0x2b/0x50 [ 40.715650] __kasan_slab_free+0x10a/0x190 [ 40.716197] kmem_cache_free+0x10d/0x4d0 [ 40.716681] rcu_core+0x8c8/0x2860 [ 40.717114] __do_softirq+0x1b7/0x7d4 [ 40.717578] [ 40.717785] Last potentially related work creation: [ 40.718339] kasan_save_stack+0x22/0x50 [ 40.718818] __kasan_record_aux_stack+0x8e/0xa0 [ 40.719356] __call_rcu_common.constprop.0+0x6a/0xb90 [ 40.719996] remove_vma+0x139/0x170 [ 40.720491] do_vmi_align_munmap+0xd4a/0x11f0 [ 40.721013] do_vmi_munmap+0x1f1/0x2b0 [ 40.721464] __vm_munmap+0x138/0x3a0 [ 40.721918] __x64_sys_munmap+0x59/0x80 [ 40.722382] do_syscall_64+0x3f/0x90 [ 40.722833] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 40.723454] [ 40.723666] The buggy address belongs to the object at ffff88800fe4a488 [ 40.723666] which belongs to the cache vm_area_struct of size 168 [ 40.725196] The buggy address is located 88 bytes inside of [ 40.725196] freed 168-byte region [ffff88800fe4a488, ffff88800fe4a530) [ 40.726597] [ 40.726816] The buggy address belongs to the physical page: [ 40.727499] page:0000000061b1b3d5 refcount:1 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0xfe4a [ 40.728603] memcg:ffff888016014101 [ 40.729032] flags: 0x100000000000200(slab|node=0|zone=1) [ 40.729693] page_type: 0xffffffff() [ 40.730145] raw: 0100000000000200 ffff88800879fc80 dead000000000122 0000000000000000 [ 40.731051] raw: 0000000000000000 0000000000110011 00000001ffffffff ffff888016014101 [ 40.731947] page dumped because: kasan: bad access detected [ 40.732598] [ 40.732807] Memory state around the buggy address: [ 40.733383] ffff88800fe4a380: fc fc fc fc 00 00 00 00 00 00 00 00 00 00 00 00 [ 40.734239] ffff88800fe4a400: 00 00 00 00 00 00 00 00 00 fc fc fc fc fc fc fc [ 40.735096] >ffff88800fe4a480: fc fa fb fb fb fb fb fb fb fb fb fb fb fb fb fb [ 40.735939] ^ [ 40.736685] ffff88800fe4a500: fb fb fb fb fb fb fc fc fc fc fc fc fc fc fa fb [ 40.737537] ffff88800fe4a580: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb [ 40.738380] ================================================================== [ 40.739433] Disabling lock debugging due to kernel taint [ 43.043113] BUG: Bad rss-counter state mm:0000000017ecb389 type:MM_FILEPAGES val:33 [ 43.044610] BUG: Bad rss-counter state mm:0000000017ecb389 type:MM_ANONPAGES val:22 [ 43.626340] BUG: Bad rss-counter state mm:00000000c5633057 type:MM_FILEPAGES val:33 [ 43.627350] BUG: Bad rss-counter state mm:00000000c5633057 type:MM_ANONPAGES val:22 Warning: Permanently added '[localhost]:36244' (ECDSA) to the list of known hosts. 2023/06/20 05:59:48 fuzzer started 2023/06/20 05:59:49 dialing manager at localhost:44161 2023/06/20 05:59:49 checking machine... 2023/06/20 05:59:49 checking revisions... [ 44.394085] kmemleak: Automatic memory scanning thread ended 2023/06/20 05:59:49 testing simple program... [ 44.442566] cgroup: Unknown subsys name 'net' [ 44.488794] cgroup: Unknown subsys name 'rlimit' executing program executing program executing program VM DIAGNOSIS: 05:59:39 Registers: info registers vcpu 0 RAX=1ffff11001a230f7 RBX=ffff88800d118788 RCX=ffffffff812e00e5 RDX=0000000000000000 RSI=0000000000000000 RDI=ffff88800d1187b8 RBP=ffff88800ff9b740 RSP=ffff888008d7fc88 R8 =0000000000000001 R9 =ffffed10011aff85 R10=0000000000000003 R11=0000000000000128 R12=dffffc0000000000 R13=ffff88800fcc51c0 R14=ffffffff8117fdd9 R15=ffff88800e333a80 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 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=00007fecd98070b0 CR3=000000000daae000 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=39353a3530203032206e754a3e36383c XMM01=7365733a646873732878696e755f6d61 XMM02=736f6c63206e6f6973736573203a296e XMM03=5f6d6170203a5d3033325b6468737320 XMM04=6456774875434142334f726f59427469 XMM05=485320415352203a3268737320303138 XMM06=206d6f726620746f6f7220726f662079 XMM07=00000000000000000000000000000000 XMM08=3a677562656420676f6c737973720000 XMM09=00000000000000000000000000000000 XMM10=00000000000000000000000000000000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000 info registers vcpu 1 RAX=ffffed1002dc3f94 RBX=ffff8880196051f0 RCX=0000000000000000 RDX=ffff88800f06b680 RSI=ffffffff8198b8dc RDI=0000000000000005 RBP=ffff88801974ceb0 RSP=ffff888016e1fc78 R8 =0000000000000005 R9 =0000000000000000 R10=0000000000000000 R11=4e49474f4c20230a R12=0000000000000001 R13=0000000000000001 R14=ffff88800ea4b300 R15=0000000000000000 RIP=ffffffff8198b8f2 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 00007fecd924f900 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=00007ffc0c71d000 CR3=000000000dba4000 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=0a0a0a0a0a0a0a0a0a0a0a0a0a0a0a0a XMM01=000000ff000000000000000000000000 XMM02=ffffffffffffff00ffff000000000000 XMM03=7720656c62697461706d6f63206d6874 XMM04=40404040404040404040404040404040 XMM05=5a5a5a5a5a5a5a5a5a5a5a5a5a5a5a5a XMM06=20202020202020202020202020202020 XMM07=00ffffffffffffffffffffffffffffff XMM08=00000000000000810000363532616873 XMM09=00000000000000000000000000000000 XMM10=00002020202020200020202020202020 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000