syzkaller login: [ 39.008182] BUG: Bad rss-counter state mm:0000000004d29c0b type:MM_FILEPAGES val:33 [ 39.009356] BUG: Bad rss-counter state mm:0000000004d29c0b type:MM_ANONPAGES val:22 [ 39.047356] ================================================================== [ 39.048397] BUG: KASAN: slab-use-after-free in vma_interval_tree_remove+0xc75/0xec0 [ 39.049391] Read of size 8 at addr ffff88800d8e4968 by task sshd/220 [ 39.050234] [ 39.050454] CPU: 0 PID: 220 Comm: sshd Not tainted 6.4.0-rc7-next-20230619 #1 [ 39.051309] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS 1.12.0-1 04/01/2014 [ 39.052291] Call Trace: [ 39.052610] [ 39.052893] dump_stack_lvl+0x91/0xf0 [ 39.053384] print_report+0xcc/0x620 [ 39.053900] ? __virt_addr_valid+0x102/0x340 [ 39.054451] ? vma_interval_tree_remove+0xc75/0xec0 [ 39.055061] ? vma_interval_tree_remove+0xc75/0xec0 [ 39.055684] kasan_report+0xbe/0xf0 [ 39.056163] ? vma_interval_tree_remove+0xc75/0xec0 [ 39.056804] vma_interval_tree_remove+0xc75/0xec0 [ 39.057412] vma_prepare+0xc54/0x11a0 [ 39.057897] __split_vma+0x5af/0x950 [ 39.058361] ? __pfx___split_vma+0x10/0x10 [ 39.058887] ? find_held_lock+0x2c/0x110 [ 39.059403] do_vmi_align_munmap+0x2ba/0x11f0 [ 39.059981] ? lock_is_held_type+0x9f/0x120 [ 39.060513] ? __pfx_do_vmi_align_munmap+0x10/0x10 [ 39.061137] ? mtree_range_walk+0x632/0x900 [ 39.061711] ? mas_walk+0x5c7/0x7c0 [ 39.062216] do_vmi_munmap+0x1f1/0x2b0 [ 39.062706] mmap_region+0x1f9/0x2660 [ 39.063204] ? vm_mmap_pgoff+0x15c/0x3a0 [ 39.063708] ? __pfx_arch_get_unmapped_area_topdown+0x10/0x10 [ 39.064429] ? __pfx_lock_acquire+0x10/0x10 [ 39.064978] ? __pfx_mmap_region+0x10/0x10 [ 39.065521] ? security_mmap_addr+0x7d/0xa0 [ 39.066074] ? get_unmapped_area+0x1f5/0x3f0 [ 39.066625] do_mmap+0x854/0xf00 [ 39.067077] vm_mmap_pgoff+0x1a6/0x3a0 [ 39.067566] ? __pfx_vm_mmap_pgoff+0x10/0x10 [ 39.068143] ksys_mmap_pgoff+0x3af/0x500 [ 39.068656] do_syscall_64+0x3f/0x90 [ 39.069153] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 39.069837] RIP: 0033:0x7fdada29fd82 [ 39.070296] 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 [ 39.072438] RSP: 002b:00007fff758ddcc8 EFLAGS: 00000206 ORIG_RAX: 0000000000000009 [ 39.073345] RAX: ffffffffffffffda RBX: 0000000000000812 RCX: 00007fdada29fd82 [ 39.074242] RDX: 0000000000000005 RSI: 0000000000001000 RDI: 00007fdad96d9000 [ 39.075096] RBP: 00007fdad96d9000 R08: 0000000000000009 R09: 0000000000001000 [ 39.075957] R10: 0000000000000812 R11: 0000000000000206 R12: 000055b2e9b2cec0 [ 39.076800] R13: 00007fff758ddce0 R14: 00007fff758ddd10 R15: 00007fff758de070 [ 39.077680] [ 39.077990] [ 39.078204] Allocated by task 213: [ 39.078629] kasan_save_stack+0x22/0x50 [ 39.079148] kasan_set_track+0x25/0x30 [ 39.079650] __kasan_slab_alloc+0x59/0x70 [ 39.080179] kmem_cache_alloc+0x16b/0x370 [ 39.080697] vm_area_dup+0x20/0x160 [ 39.081176] __split_vma+0x170/0x950 [ 39.081662] split_vma+0xc6/0x110 [ 39.082116] mprotect_fixup+0x8d2/0xb30 [ 39.082615] do_mprotect_pkey+0x87e/0xd40 [ 39.083151] __x64_sys_mprotect+0x78/0xc0 [ 39.083676] do_syscall_64+0x3f/0x90 [ 39.084168] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 39.084801] [ 39.085026] Freed by task 19: [ 39.085430] kasan_save_stack+0x22/0x50 [ 39.085952] kasan_set_track+0x25/0x30 [ 39.086442] kasan_save_free_info+0x2b/0x50 [ 39.086981] __kasan_slab_free+0x10a/0x190 [ 39.087522] kmem_cache_free+0x10d/0x4d0 [ 39.088050] rcu_core+0x8c8/0x2860 [ 39.088495] __do_softirq+0x1b7/0x7d4 [ 39.088983] [ 39.089204] Last potentially related work creation: [ 39.089813] kasan_save_stack+0x22/0x50 [ 39.090325] __kasan_record_aux_stack+0x8e/0xa0 [ 39.090912] __call_rcu_common.constprop.0+0x6a/0xb90 [ 39.091544] remove_vma+0x139/0x170 [ 39.092009] do_vmi_align_munmap+0xd4a/0x11f0 [ 39.092574] do_vmi_munmap+0x1f1/0x2b0 [ 39.093076] __vm_munmap+0x138/0x3a0 [ 39.093565] __x64_sys_munmap+0x59/0x80 [ 39.094071] do_syscall_64+0x3f/0x90 [ 39.094541] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 39.095201] [ 39.095418] The buggy address belongs to the object at ffff88800d8e4910 [ 39.095418] which belongs to the cache vm_area_struct of size 168 [ 39.096899] The buggy address is located 88 bytes inside of [ 39.096899] freed 168-byte region [ffff88800d8e4910, ffff88800d8e49b8) [ 39.098345] [ 39.098564] The buggy address belongs to the physical page: [ 39.099238] page:00000000db9ddd98 refcount:1 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0xd8e4 [ 39.100340] memcg:ffff88800d9b3c01 [ 39.100761] flags: 0x100000000000200(slab|node=0|zone=1) [ 39.101439] page_type: 0xffffffff() [ 39.101901] raw: 0100000000000200 ffff88800879fc80 dead000000000122 0000000000000000 [ 39.102807] raw: 0000000000000000 0000000000110011 00000001ffffffff ffff88800d9b3c01 [ 39.103742] page dumped because: kasan: bad access detected [ 39.104417] [ 39.104631] Memory state around the buggy address: [ 39.105217] ffff88800d8e4800: fc fc fc fc fc 00 00 00 00 00 00 00 00 00 00 00 [ 39.106093] ffff88800d8e4880: 00 00 00 00 00 00 00 00 00 00 fc fc fc fc fc fc [ 39.106972] >ffff88800d8e4900: fc fc fa fb fb fb fb fb fb fb fb fb fb fb fb fb [ 39.107818] ^ [ 39.108631] ffff88800d8e4980: fb fb fb fb fb fb fb fc fc fc fc fc fc fc fc fa [ 39.109540] ffff88800d8e4a00: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb [ 39.110408] ================================================================== [ 39.111506] Disabling lock debugging due to kernel taint [ 41.263107] BUG: Bad rss-counter state mm:000000004fdc3211 type:MM_FILEPAGES val:33 [ 41.264276] BUG: Bad rss-counter state mm:000000004fdc3211 type:MM_ANONPAGES val:22 [ 41.598668] BUG: Bad rss-counter state mm:0000000010c0bd2b type:MM_FILEPAGES val:33 [ 41.599917] BUG: Bad rss-counter state mm:0000000010c0bd2b type:MM_ANONPAGES val:22 Warning: Permanently added '[localhost]:18790' (ECDSA) to the list of known hosts. 2023/06/19 23:14:45 fuzzer started 2023/06/19 23:14:45 dialing manager at localhost:44161 2023/06/19 23:14:45 checking machine... 2023/06/19 23:14:45 checking revisions... [ 42.236755] kmemleak: Automatic memory scanning thread ended 2023/06/19 23:14:45 testing simple program... [ 42.289468] cgroup: Unknown subsys name 'net' [ 42.346293] cgroup: Unknown subsys name 'rlimit' executing program executing program executing program VM DIAGNOSIS: 23:14:36 Registers: info registers vcpu 0 RAX=0000000000000000 RBX=0000000000000001 RCX=ffffffff81f1758a RDX=ffff888016699b40 RSI=0000000000000000 RDI=0000000000000001 RBP=ffff888019a99680 RSP=ffff888016bdf930 R8 =0000000000000001 R9 =0000000000000000 R10=0000000000000001 R11=0000000000000001 R12=ffff888019d058b0 R13=0000000000000000 R14=1ffff11002d7bf2f R15=0000000000000000 RIP=ffffffff814c07e0 RFL=00000202 [-------] 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 00007f5bd44bd900 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=00007f5bd4a72650 CR3=0000000015bb6000 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=ffffffff00ffffffffffffffffffffff XMM01=707465675f6c697475646f6d6d61705f XMM02=ff000000000000ff0000000000ff0000 XMM03=66207463656e6e6f6373696420646576 XMM04=00000000000000000000000000000000 XMM05=00000000000000000000000000000000 XMM06=0d0c0f0e09080b0a0504070601000302 XMM07=00000000000000000000000000000000 XMM08=000a0d732a2e25006c61746166003367 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=00007fffe87eecf8 CR3=0000000016ac2000 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=2034343a34313a3332203931206e754a XMM01=657463656e6e6f63736944203a5d3932 XMM02=302e303120746f6f722072657375206d XMM03=203a5d3932325b646873732072656c6c XMM04=69662068637573206f4e203a656c6163 XMM05=3a656c696620766e65206e65706f206f XMM06=65733a6468737328766e655f6d617020 XMM07=6b7a79732034343a34313a3332203931 XMM08=3d656e696c646d632022656369767265 XMM09=00000000000000000000000000000000 XMM10=00000000000000000000000000000000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000