syzkaller login: [ 30.416573] BUG: Bad rss-counter state mm:00000000891783e4 type:MM_FILEPAGES val:33 [ 30.418388] BUG: Bad rss-counter state mm:00000000891783e4 type:MM_ANONPAGES val:22 [ 30.591100] ================================================================== [ 30.592137] BUG: KASAN: slab-use-after-free in vma_interval_tree_remove+0xc75/0xec0 [ 30.593106] Read of size 8 at addr ffff888009a9b3f8 by task sshd/221 [ 30.594000] [ 30.594230] CPU: 0 PID: 221 Comm: sshd Not tainted 6.4.0-rc7-next-20230619 #1 [ 30.595139] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS 1.12.0-1 04/01/2014 [ 30.596176] Call Trace: [ 30.596509] [ 30.596811] dump_stack_lvl+0x91/0xf0 [ 30.597322] print_report+0xcc/0x620 [ 30.597830] ? __virt_addr_valid+0x102/0x340 [ 30.598418] ? vma_interval_tree_remove+0xc75/0xec0 [ 30.599098] ? vma_interval_tree_remove+0xc75/0xec0 [ 30.599759] kasan_report+0xbe/0xf0 [ 30.600267] ? vma_interval_tree_remove+0xc75/0xec0 [ 30.600921] vma_interval_tree_remove+0xc75/0xec0 [ 30.601563] vma_prepare+0xc54/0x11a0 [ 30.602064] __split_vma+0x5af/0x950 [ 30.602570] ? __pfx___split_vma+0x10/0x10 [ 30.603141] ? find_held_lock+0x2c/0x110 [ 30.603692] do_vmi_align_munmap+0x2ba/0x11f0 [ 30.604295] ? lock_is_held_type+0x9f/0x120 [ 30.604860] ? __pfx_do_vmi_align_munmap+0x10/0x10 [ 30.605500] ? mtree_range_walk+0x632/0x900 [ 30.606090] ? mas_walk+0x5c7/0x7c0 [ 30.606592] do_vmi_munmap+0x1f1/0x2b0 [ 30.607120] mmap_region+0x1f9/0x2660 [ 30.607637] ? vm_mmap_pgoff+0x15c/0x3a0 [ 30.608179] ? __pfx_arch_get_unmapped_area_topdown+0x10/0x10 [ 30.608926] ? __pfx_lock_acquire+0x10/0x10 [ 30.609487] ? __pfx_mmap_region+0x10/0x10 [ 30.610045] ? security_mmap_addr+0x7d/0xa0 [ 30.610619] ? get_unmapped_area+0x1f5/0x3f0 [ 30.611224] do_mmap+0x854/0xf00 [ 30.611695] vm_mmap_pgoff+0x1a6/0x3a0 [ 30.612231] ? __pfx_vm_mmap_pgoff+0x10/0x10 [ 30.612843] ksys_mmap_pgoff+0x3af/0x500 [ 30.613395] do_syscall_64+0x3f/0x90 [ 30.613909] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 30.614605] RIP: 0033:0x7fd8e5655d82 [ 30.615109] 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 [ 30.617353] RSP: 002b:00007ffdb8af7768 EFLAGS: 00000206 ORIG_RAX: 0000000000000009 [ 30.618321] RAX: ffffffffffffffda RBX: 0000000000000812 RCX: 00007fd8e5655d82 [ 30.619243] RDX: 0000000000000005 RSI: 0000000000001000 RDI: 00007fd8e4a8f000 [ 30.620156] RBP: 00007fd8e4a8f000 R08: 0000000000000009 R09: 0000000000001000 [ 30.621064] R10: 0000000000000812 R11: 0000000000000206 R12: 00005587a84cfd90 [ 30.621972] R13: 00007ffdb8af7780 R14: 00007ffdb8af77b0 R15: 00007ffdb8af7b10 [ 30.622887] [ 30.623206] [ 30.623438] Allocated by task 214: [ 30.623897] kasan_save_stack+0x22/0x50 [ 30.624435] kasan_set_track+0x25/0x30 [ 30.624963] __kasan_slab_alloc+0x59/0x70 [ 30.625525] kmem_cache_alloc+0x16b/0x370 [ 30.626082] vm_area_dup+0x20/0x160 [ 30.626575] __split_vma+0x170/0x950 [ 30.627083] split_vma+0xc6/0x110 [ 30.627558] mprotect_fixup+0x8d2/0xb30 [ 30.628094] do_mprotect_pkey+0x87e/0xd40 [ 30.628657] __x64_sys_mprotect+0x78/0xc0 [ 30.629219] do_syscall_64+0x3f/0x90 [ 30.629731] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 30.630418] [ 30.630647] Freed by task 214: [ 30.631089] kasan_save_stack+0x22/0x50 [ 30.631638] kasan_set_track+0x25/0x30 [ 30.632173] kasan_save_free_info+0x2b/0x50 [ 30.632753] __kasan_slab_free+0x10a/0x190 [ 30.633324] kmem_cache_free+0x10d/0x4d0 [ 30.633875] rcu_core+0x8c8/0x2860 [ 30.634349] __do_softirq+0x1b7/0x7d4 [ 30.634861] [ 30.635100] Last potentially related work creation: [ 30.635731] kasan_save_stack+0x22/0x50 [ 30.636277] __kasan_record_aux_stack+0x8e/0xa0 [ 30.636895] __call_rcu_common.constprop.0+0x6a/0xb90 [ 30.637584] remove_vma+0x139/0x170 [ 30.638073] do_vmi_align_munmap+0xd4a/0x11f0 [ 30.638690] do_vmi_munmap+0x1f1/0x2b0 [ 30.639212] __vm_munmap+0x138/0x3a0 [ 30.639718] __x64_sys_munmap+0x59/0x80 [ 30.640250] do_syscall_64+0x3f/0x90 [ 30.640763] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 30.641456] [ 30.641685] The buggy address belongs to the object at ffff888009a9b3a0 [ 30.641685] which belongs to the cache vm_area_struct of size 168 [ 30.643298] The buggy address is located 88 bytes inside of [ 30.643298] freed 168-byte region [ffff888009a9b3a0, ffff888009a9b448) [ 30.644805] [ 30.645038] The buggy address belongs to the physical page: [ 30.645744] page:000000007d14e5be refcount:1 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0x9a9b [ 30.646904] memcg:ffff88800ebb8f01 [ 30.647375] flags: 0x100000000000200(slab|node=0|zone=1) [ 30.648073] page_type: 0xffffffff() [ 30.648558] raw: 0100000000000200 ffff88800879fc80 dead000000000122 0000000000000000 [ 30.649551] raw: 0000000000000000 0000000000110011 00000001ffffffff ffff88800ebb8f01 [ 30.650529] page dumped because: kasan: bad access detected [ 30.651257] [ 30.651493] Memory state around the buggy address: [ 30.652114] ffff888009a9b280: fc fc fc fc fc fc fc 00 00 00 00 00 00 00 00 00 [ 30.653039] ffff888009a9b300: 00 00 00 00 00 00 00 00 00 00 00 00 fc fc fc fc [ 30.653958] >ffff888009a9b380: fc fc fc fc fa fb fb fb fb fb fb fb fb fb fb fb [ 30.654883] ^ [ 30.655786] ffff888009a9b400: fb fb fb fb fb fb fb fb fb fc fc fc fc fc fc fc [ 30.656719] ffff888009a9b480: fc fa fb fb fb fb fb fb fb fb fb fb fb fb fb fb [ 30.657643] ================================================================== [ 30.658718] Disabling lock debugging due to kernel taint [ 32.705269] BUG: Bad rss-counter state mm:00000000d9332001 type:MM_FILEPAGES val:33 [ 32.706611] BUG: Bad rss-counter state mm:00000000d9332001 type:MM_ANONPAGES val:22 [ 33.194104] BUG: Bad rss-counter state mm:00000000482acc18 type:MM_FILEPAGES val:33 [ 33.195295] BUG: Bad rss-counter state mm:00000000482acc18 type:MM_ANONPAGES val:22 Warning: Permanently added '[localhost]:23210' (ECDSA) to the list of known hosts. 2023/06/19 18:29:28 fuzzer started 2023/06/19 18:29:29 dialing manager at localhost:44161 2023/06/19 18:29:29 checking machine... 2023/06/19 18:29:29 checking revisions... [ 33.814168] kmemleak: Automatic memory scanning thread ended 2023/06/19 18:29:29 testing simple program... [ 33.864833] cgroup: Unknown subsys name 'net' [ 33.906540] cgroup: Unknown subsys name 'rlimit' executing program executing program executing program VM DIAGNOSIS: 18:29:27 Registers: info registers vcpu 0 RAX=dffffc0000000000 RBX=ffffffff813ad420 RCX=ffffffff86137501 RDX=1ffff1100d9c135a RSI=ffffffff8180ee7e RDI=ffff88806ce09b40 RBP=ffff88806ce09b10 RSP=ffff88806ce09a68 R8 =ffffffff8613751e R9 =ffff88806ce09ab8 R10=0000000000038001 R11=0000000000020d8a R12=ffff88806ce09b40 R13=0000000000000000 R14=ffff88801596d1c0 R15=ffff888016119880 RIP=ffffffff813ad42f 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 00007f2f8d1cf900 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=00007fff19328000 CR3=000000001854a000 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=563412feff00545000000000000080fe XMM01=74696d7265705f6d61703d73726f746e XMM02=000000000000000000000000000000ff XMM03=5320444f4854454d5f54505952434e45 XMM04=40404040404040404040404040404040 XMM05=5a5a5a5a5a5a5a5a5a5a5a5a5a5a5a5a XMM06=20202020202020202020202020202020 XMM07=00000000000000000000000000000000 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=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=00007f789db57400 CR3=000000000f212000 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=2038323a39323a3831203931206e754a XMM01=73732878696e755f6d6170203a5d3033 XMM02=65736f6c63206e6f6973736573203a29 XMM03=755f6d6170203a5d3033325b64687373 XMM04=69662068637573206f4e203a656c6163 XMM05=3a656c696620766e65206e65706f206f XMM06=65733a6468737328766e655f6d617020 XMM07=6b7a79732038323a39323a3831203931 XMM08=3d656e696c646d632022656369767265 XMM09=00000000000000000000000000000000 XMM10=00000000000000000000000000000000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000