syzkaller login: [ 34.438600] BUG: Bad rss-counter state mm:000000001d737072 type:MM_FILEPAGES val:33 [ 34.439869] BUG: Bad rss-counter state mm:000000001d737072 type:MM_ANONPAGES val:22 [ 34.478314] ================================================================== [ 34.479376] BUG: KASAN: slab-use-after-free in vma_interval_tree_remove+0xc75/0xec0 [ 34.480472] Read of size 8 at addr ffff88800e4cf228 by task sshd/220 [ 34.481372] [ 34.481647] CPU: 0 PID: 220 Comm: sshd Not tainted 6.4.0-rc7-next-20230619 #1 [ 34.482657] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS 1.12.0-1 04/01/2014 [ 34.483722] Call Trace: [ 34.484055] [ 34.484368] dump_stack_lvl+0x91/0xf0 [ 34.484886] print_report+0xcc/0x620 [ 34.485410] ? __virt_addr_valid+0x102/0x340 [ 34.486012] ? vma_interval_tree_remove+0xc75/0xec0 [ 34.486658] ? vma_interval_tree_remove+0xc75/0xec0 [ 34.487314] kasan_report+0xbe/0xf0 [ 34.487811] ? vma_interval_tree_remove+0xc75/0xec0 [ 34.488506] vma_interval_tree_remove+0xc75/0xec0 [ 34.489164] vma_prepare+0xc54/0x11a0 [ 34.489694] __split_vma+0x5af/0x950 [ 34.490213] ? __pfx___split_vma+0x10/0x10 [ 34.490776] ? find_held_lock+0x2c/0x110 [ 34.491338] do_vmi_align_munmap+0x2ba/0x11f0 [ 34.491941] ? lock_is_held_type+0x9f/0x120 [ 34.492516] ? __pfx_do_vmi_align_munmap+0x10/0x10 [ 34.493150] ? mtree_range_walk+0x632/0x900 [ 34.493736] ? mas_walk+0x5c7/0x7c0 [ 34.494248] do_vmi_munmap+0x1f1/0x2b0 [ 34.494778] mmap_region+0x1f9/0x2660 [ 34.495288] ? vm_mmap_pgoff+0x15c/0x3a0 [ 34.495824] ? __pfx_arch_get_unmapped_area_topdown+0x10/0x10 [ 34.496586] ? __pfx_lock_acquire+0x10/0x10 [ 34.497163] ? __pfx_mmap_region+0x10/0x10 [ 34.497735] ? security_mmap_addr+0x7d/0xa0 [ 34.498300] ? get_unmapped_area+0x1f5/0x3f0 [ 34.498878] do_mmap+0x854/0xf00 [ 34.499353] vm_mmap_pgoff+0x1a6/0x3a0 [ 34.499882] ? __pfx_vm_mmap_pgoff+0x10/0x10 [ 34.500492] ksys_mmap_pgoff+0x3af/0x500 [ 34.501039] do_syscall_64+0x3f/0x90 [ 34.501564] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 34.502254] RIP: 0033:0x7fc3b7be8d82 [ 34.502729] 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 [ 34.504969] RSP: 002b:00007ffd29ba0ac8 EFLAGS: 00000206 ORIG_RAX: 0000000000000009 [ 34.505944] RAX: ffffffffffffffda RBX: 0000000000000812 RCX: 00007fc3b7be8d82 [ 34.506834] RDX: 0000000000000005 RSI: 0000000000001000 RDI: 00007fc3b7022000 [ 34.507727] RBP: 00007fc3b7022000 R08: 0000000000000009 R09: 0000000000001000 [ 34.508613] R10: 0000000000000812 R11: 0000000000000206 R12: 000055b2f5333f60 [ 34.509536] R13: 00007ffd29ba0ae0 R14: 00007ffd29ba0b10 R15: 00007ffd29ba0e70 [ 34.510439] [ 34.510748] [ 34.510981] Allocated by task 213: [ 34.511430] kasan_save_stack+0x22/0x50 [ 34.511966] kasan_set_track+0x25/0x30 [ 34.512492] __kasan_slab_alloc+0x59/0x70 [ 34.513040] kmem_cache_alloc+0x16b/0x370 [ 34.513604] vm_area_dup+0x20/0x160 [ 34.514078] __split_vma+0x170/0x950 [ 34.514567] split_vma+0xc6/0x110 [ 34.515022] mprotect_fixup+0x8d2/0xb30 [ 34.515582] do_mprotect_pkey+0x87e/0xd40 [ 34.516138] __x64_sys_mprotect+0x78/0xc0 [ 34.516696] do_syscall_64+0x3f/0x90 [ 34.517206] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 34.517902] [ 34.518137] Freed by task 213: [ 34.518554] kasan_save_stack+0x22/0x50 [ 34.519095] kasan_set_track+0x25/0x30 [ 34.519622] kasan_save_free_info+0x2b/0x50 [ 34.520176] __kasan_slab_free+0x10a/0x190 [ 34.520743] kmem_cache_free+0x10d/0x4d0 [ 34.521279] rcu_core+0x8c8/0x2860 [ 34.521764] __do_softirq+0x1b7/0x7d4 [ 34.522274] [ 34.522503] Last potentially related work creation: [ 34.523122] kasan_save_stack+0x22/0x50 [ 34.523651] __kasan_record_aux_stack+0x8e/0xa0 [ 34.524271] __call_rcu_common.constprop.0+0x6a/0xb90 [ 34.524971] remove_vma+0x139/0x170 [ 34.525476] do_vmi_align_munmap+0xd4a/0x11f0 [ 34.526074] do_vmi_munmap+0x1f1/0x2b0 [ 34.526582] __vm_munmap+0x138/0x3a0 [ 34.527068] __x64_sys_munmap+0x59/0x80 [ 34.527589] do_syscall_64+0x3f/0x90 [ 34.528096] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 34.528761] [ 34.529003] The buggy address belongs to the object at ffff88800e4cf1d0 [ 34.529003] which belongs to the cache vm_area_struct of size 168 [ 34.530567] The buggy address is located 88 bytes inside of [ 34.530567] freed 168-byte region [ffff88800e4cf1d0, ffff88800e4cf278) [ 34.532033] [ 34.532259] The buggy address belongs to the physical page: [ 34.532962] page:000000002ad3997a refcount:1 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0xe4cf [ 34.534108] memcg:ffff88800cc43f01 [ 34.534556] anon flags: 0x100000000000200(slab|node=0|zone=1) [ 34.535276] page_type: 0xffffffff() [ 34.535751] raw: 0100000000000200 ffff88800879fc80 ffffea000037afc0 dead000000000003 [ 34.536736] raw: 0000000000000000 0000000000110011 00000001ffffffff ffff88800cc43f01 [ 34.537733] page dumped because: kasan: bad access detected [ 34.538459] [ 34.538689] Memory state around the buggy address: [ 34.539322] ffff88800e4cf100: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 [ 34.540234] ffff88800e4cf180: 00 00 fc fc fc fc fc fc fc fc fa fb fb fb fb fb [ 34.541134] >ffff88800e4cf200: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fc [ 34.542072] ^ [ 34.542670] ffff88800e4cf280: fc fc fc fc fc fc fc 00 00 00 00 00 00 00 00 00 [ 34.543572] ffff88800e4cf300: 00 00 00 00 00 00 00 00 00 00 00 00 fc fc fc fc [ 34.544482] ================================================================== [ 34.545920] Disabling lock debugging due to kernel taint [ 36.943097] BUG: Bad rss-counter state mm:0000000092bcdea6 type:MM_FILEPAGES val:33 [ 36.944028] BUG: Bad rss-counter state mm:0000000092bcdea6 type:MM_ANONPAGES val:22 [ 37.393112] BUG: Bad rss-counter state mm:00000000f7cd7d89 type:MM_FILEPAGES val:33 [ 37.394086] BUG: Bad rss-counter state mm:00000000f7cd7d89 type:MM_ANONPAGES val:22 Warning: Permanently added '[localhost]:3711' (ECDSA) to the list of known hosts. 2023/06/19 13:33:31 fuzzer started 2023/06/19 13:33:31 dialing manager at localhost:44161 2023/06/19 13:33:31 checking machine... 2023/06/19 13:33:31 checking revisions... [ 38.011487] kmemleak: Automatic memory scanning thread ended 2023/06/19 13:33:31 testing simple program... [ 38.063243] cgroup: Unknown subsys name 'net' [ 38.103574] cgroup: Unknown subsys name 'rlimit' executing program executing program executing program VM DIAGNOSIS: 13:33:27 Registers: info registers vcpu 0 RAX=0000000000000001 RBX=00000000000e0520 RCX=00007f1286453344 RDX=00007ffc9bf772c8 RSI=00007ffc9bf772c8 RDI=00005654def74330 RBP=00007ffc9bf77348 RSP=00007ffc9bf772c0 R8 =0000000000001608 R9 =00000000000e0520 R10=0000000000000002 R11=00007f1284df02c8 R12=00007f1284d9b520 R13=00005654def73530 R14=0000000000000006 R15=00007ffc9bf772d0 RIP=00007f1286453475 RFL=00000202 [-------] CPL=3 II=0 A20=1 SMM=0 HLT=0 ES =0000 0000000000000000 00000000 00000000 CS =0033 0000000000000000 ffffffff 00a0fb00 DPL=3 CS64 [-RA] SS =002b 0000000000000000 ffffffff 00c0f300 DPL=3 DS [-WA] DS =0000 0000000000000000 00000000 00000000 FS =0000 00007f12858d0900 00000000 00000000 GS =0000 0000000000000000 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=00007f1284cbdcd0 CR3=000000000cc5a000 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=000000000010ce202fccd54c36d8a3f3 XMM01=da5fc7d5d64eaaaedf42a6ab2f8efb21 XMM02=000000000011cff8eff9b2d0a8fce9cb XMM03=000000000011d0c82c67c8bc2e329bc3 XMM04=9075f00ef047b54600000000000ae988 XMM05=1aa99f4df63a91f200000000001351a0 XMM06=4fda316b135da52b0000000000133f90 XMM07=fb795ef6d65770560000000000124508 XMM08=2c67c8bc2e329bc3000000000011d068 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=00007ffd232ed6e8 CR3=0000000015a4e000 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=2030333a33333a3331203931206e754a XMM01=657463656e6e6f63736944203a5d3932 XMM02=302e303120746f6f722072657375206d XMM03=203a5d3932325b646873732072656c6c XMM04=69662068637573206f4e203a656c6163 XMM05=3a656c696620766e65206e65706f206f XMM06=65733a6468737328766e655f6d617020 XMM07=6b7a79732030333a33333a3331203931 XMM08=00007effcc0044800000004a00000080 XMM09=00000000000000000000000000000000 XMM10=00000000000000000000000000000000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000