syzkaller login: [ 33.914611] BUG: Bad rss-counter state mm:000000005ad26058 type:MM_FILEPAGES val:33 [ 33.916447] BUG: Bad rss-counter state mm:000000005ad26058 type:MM_ANONPAGES val:22 [ 34.070886] ================================================================== [ 34.072013] BUG: KASAN: slab-use-after-free in vma_interval_tree_remove+0xc75/0xec0 [ 34.073141] Read of size 8 at addr ffff88800e9fe058 by task sshd/221 [ 34.074254] [ 34.074510] CPU: 1 PID: 221 Comm: sshd Not tainted 6.4.0-rc7-next-20230619 #1 [ 34.075599] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS 1.12.0-1 04/01/2014 [ 34.076812] Call Trace: [ 34.077202] [ 34.077546] dump_stack_lvl+0x91/0xf0 [ 34.078139] print_report+0xcc/0x620 [ 34.078719] ? __virt_addr_valid+0x102/0x340 [ 34.079392] ? vma_interval_tree_remove+0xc75/0xec0 [ 34.080143] ? vma_interval_tree_remove+0xc75/0xec0 [ 34.080897] kasan_report+0xbe/0xf0 [ 34.081460] ? vma_interval_tree_remove+0xc75/0xec0 [ 34.082222] vma_interval_tree_remove+0xc75/0xec0 [ 34.082948] vma_prepare+0xc54/0x11a0 [ 34.083526] __split_vma+0x5af/0x950 [ 34.084091] ? __pfx___split_vma+0x10/0x10 [ 34.084729] ? find_held_lock+0x2c/0x110 [ 34.085365] do_vmi_align_munmap+0x2ba/0x11f0 [ 34.086059] ? lock_is_held_type+0x9f/0x120 [ 34.086705] ? __pfx_do_vmi_align_munmap+0x10/0x10 [ 34.087455] ? mtree_range_walk+0x632/0x900 [ 34.088119] ? mas_walk+0x5c7/0x7c0 [ 34.088688] do_vmi_munmap+0x1f1/0x2b0 [ 34.089282] mmap_region+0x1f9/0x2660 [ 34.089870] ? vm_mmap_pgoff+0x15c/0x3a0 [ 34.090482] ? __pfx_arch_get_unmapped_area_topdown+0x10/0x10 [ 34.091336] ? __pfx_lock_acquire+0x10/0x10 [ 34.092007] ? __pfx_mmap_region+0x10/0x10 [ 34.092643] ? security_mmap_addr+0x7d/0xa0 [ 34.093287] ? get_unmapped_area+0x1f5/0x3f0 [ 34.093962] do_mmap+0x854/0xf00 [ 34.094485] vm_mmap_pgoff+0x1a6/0x3a0 [ 34.095082] ? __pfx_vm_mmap_pgoff+0x10/0x10 [ 34.095768] ksys_mmap_pgoff+0x3af/0x500 [ 34.096382] do_syscall_64+0x3f/0x90 [ 34.096965] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 34.097748] RIP: 0033:0x7eff71f41d82 [ 34.098300] 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 [ 34.100924] RSP: 002b:00007ffc37bd8a68 EFLAGS: 00000206 ORIG_RAX: 0000000000000009 [ 34.102038] RAX: ffffffffffffffda RBX: 0000000000000812 RCX: 00007eff71f41d82 [ 34.103083] RDX: 0000000000000005 RSI: 0000000000001000 RDI: 00007eff7137b000 [ 34.104129] RBP: 00007eff7137b000 R08: 0000000000000009 R09: 0000000000001000 [ 34.105181] R10: 0000000000000812 R11: 0000000000000206 R12: 000055a2a1013b20 [ 34.106025] R13: 00007ffc37bd8a80 R14: 00007ffc37bd8ab0 R15: 00007ffc37bd8e10 [ 34.106834] [ 34.107109] [ 34.107313] Allocated by task 214: [ 34.107744] kasan_save_stack+0x22/0x50 [ 34.108222] kasan_set_track+0x25/0x30 [ 34.108687] __kasan_slab_alloc+0x59/0x70 [ 34.109180] kmem_cache_alloc+0x16b/0x370 [ 34.109668] vm_area_dup+0x20/0x160 [ 34.110098] __split_vma+0x170/0x950 [ 34.110542] split_vma+0xc6/0x110 [ 34.110956] mprotect_fixup+0x8d2/0xb30 [ 34.111440] do_mprotect_pkey+0x87e/0xd40 [ 34.111939] __x64_sys_mprotect+0x78/0xc0 [ 34.112429] do_syscall_64+0x3f/0x90 [ 34.112880] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 34.113486] [ 34.113693] Freed by task 214: [ 34.114071] kasan_save_stack+0x22/0x50 [ 34.114546] kasan_set_track+0x25/0x30 [ 34.115123] kasan_save_free_info+0x2b/0x50 [ 34.115645] __kasan_slab_free+0x10a/0x190 [ 34.116167] kmem_cache_free+0x10d/0x4d0 [ 34.116676] rcu_core+0x8c8/0x2860 [ 34.117122] __do_softirq+0x1b7/0x7d4 [ 34.117600] [ 34.117818] Last potentially related work creation: [ 34.118406] kasan_save_stack+0x22/0x50 [ 34.118902] __kasan_record_aux_stack+0x8e/0xa0 [ 34.119479] __call_rcu_common.constprop.0+0x6a/0xb90 [ 34.120116] remove_vma+0x139/0x170 [ 34.120570] do_vmi_align_munmap+0xd4a/0x11f0 [ 34.121122] do_vmi_munmap+0x1f1/0x2b0 [ 34.121603] __vm_munmap+0x138/0x3a0 [ 34.122076] __x64_sys_munmap+0x59/0x80 [ 34.122566] do_syscall_64+0x3f/0x90 [ 34.123023] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 34.123663] [ 34.123878] The buggy address belongs to the object at ffff88800e9fe000 [ 34.123878] which belongs to the cache vm_area_struct of size 168 [ 34.125340] The buggy address is located 88 bytes inside of [ 34.125340] freed 168-byte region [ffff88800e9fe000, ffff88800e9fe0a8) [ 34.126741] [ 34.126952] The buggy address belongs to the physical page: [ 34.127623] page:00000000b7a5b3f8 refcount:1 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0xe9fe [ 34.128707] memcg:ffff88800f1ea501 [ 34.129133] flags: 0x100000000000200(slab|node=0|zone=1) [ 34.129781] page_type: 0xffffffff() [ 34.130231] raw: 0100000000000200 ffff88800879fc80 dead000000000122 0000000000000000 [ 34.131112] raw: 0000000000000000 0000000000110011 00000001ffffffff ffff88800f1ea501 [ 34.132011] page dumped because: kasan: bad access detected [ 34.132663] [ 34.132879] Memory state around the buggy address: [ 34.133459] ffff88800e9fdf00: 00 00 00 00 00 00 fc fc fc fc fc fc fc fc fc fc [ 34.134322] ffff88800e9fdf80: fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc [ 34.135161] >ffff88800e9fe000: fa fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb [ 34.136024] ^ [ 34.136761] ffff88800e9fe080: fb fb fb fb fb fc fc fc fc fc fc fc fc fa fb fb [ 34.137604] ffff88800e9fe100: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb [ 34.138456] ================================================================== [ 34.139349] Disabling lock debugging due to kernel taint [ 36.241413] BUG: Bad rss-counter state mm:00000000d3d3f5dd type:MM_FILEPAGES val:33 [ 36.242593] BUG: Bad rss-counter state mm:00000000d3d3f5dd type:MM_ANONPAGES val:22 [ 36.705610] BUG: Bad rss-counter state mm:00000000a71f7d94 type:MM_FILEPAGES val:33 [ 36.706583] BUG: Bad rss-counter state mm:00000000a71f7d94 type:MM_ANONPAGES val:22 Warning: Permanently added '[localhost]:61392' (ECDSA) to the list of known hosts. 2023/06/19 13:33:34 fuzzer started 2023/06/19 13:33:35 dialing manager at localhost:44161 2023/06/19 13:33:35 checking machine... 2023/06/19 13:33:35 checking revisions... [ 37.337540] kmemleak: Automatic memory scanning thread ended 2023/06/19 13:33:35 testing simple program... [ 37.386388] cgroup: Unknown subsys name 'net' [ 37.460144] cgroup: Unknown subsys name 'rlimit' executing program executing program executing program VM DIAGNOSIS: 13:33:31 Registers: info registers vcpu 0 RAX=dffffc0000000000 RBX=ffff888017cff988 RCX=0000000000000001 RDX=1ffff1100d9c1350 RSI=ffff888017cff958 RDI=ffff88806ce09a80 RBP=ffff88800a1a03c0 RSP=ffff88806ce09a08 R8 =0000000000000001 R9 =ffff88806ce09ab8 R10=0000000000038001 R11=000000000008de0d R12=ffff88806ce09ad8 R13=ffff88806ce09ac0 R14=ffff888017cff958 R15=ffff88806ce09a78 RIP=ffffffff81131c83 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 00007f0c1a96c900 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=00007ffdc1b78000 CR3=000000001cdba000 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=00000000000000000000000000000000 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=00007fcd10ca43c0 CR3=0000000015fb2000 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=2034333a33333a3331203931206e754a XMM01=73732878696e755f6d6170203a5d3033 XMM02=65736f6c63206e6f6973736573203a29 XMM03=755f6d6170203a5d3033325b64687373 XMM04=69662068637573206f4e203a656c6163 XMM05=3a656c696620766e65206e65706f206f XMM06=65733a6468737328766e655f6d617020 XMM07=6b7a79732034333a33333a3331203931 XMM08=3d656e696c646d632022656369767265 XMM09=00000000000000000000000000000000 XMM10=00000000000000000000000000000000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000