syzkaller login: [ 32.278766] BUG: Bad rss-counter state mm:0000000065b145c3 type:MM_FILEPAGES val:33 [ 32.280130] BUG: Bad rss-counter state mm:0000000065b145c3 type:MM_ANONPAGES val:22 [ 32.417731] ================================================================== [ 32.418673] BUG: KASAN: slab-use-after-free in vma_interval_tree_remove+0xc75/0xec0 [ 32.419596] Read of size 8 at addr ffff88800f12a5c8 by task sshd/221 [ 32.420458] [ 32.420677] CPU: 0 PID: 221 Comm: sshd Not tainted 6.4.0-rc7-next-20230619 #1 [ 32.421547] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS 1.12.0-1 04/01/2014 [ 32.422513] Call Trace: [ 32.422829] <TASK> [ 32.423111] dump_stack_lvl+0x91/0xf0 [ 32.423597] print_report+0xcc/0x620 [ 32.424086] ? __virt_addr_valid+0x102/0x340 [ 32.424640] ? vma_interval_tree_remove+0xc75/0xec0 [ 32.425278] ? vma_interval_tree_remove+0xc75/0xec0 [ 32.425891] kasan_report+0xbe/0xf0 [ 32.426357] ? vma_interval_tree_remove+0xc75/0xec0 [ 32.426971] vma_interval_tree_remove+0xc75/0xec0 [ 32.427570] vma_prepare+0xc54/0x11a0 [ 32.428053] __split_vma+0x5af/0x950 [ 32.428527] ? __pfx___split_vma+0x10/0x10 [ 32.429049] ? find_held_lock+0x2c/0x110 [ 32.429601] do_vmi_align_munmap+0x2ba/0x11f0 [ 32.430165] ? lock_is_held_type+0x9f/0x120 [ 32.430699] ? __pfx_do_vmi_align_munmap+0x10/0x10 [ 32.431308] ? mtree_range_walk+0x632/0x900 [ 32.431856] ? mas_walk+0x5c7/0x7c0 [ 32.432324] do_vmi_munmap+0x1f1/0x2b0 [ 32.432813] mmap_region+0x1f9/0x2660 [ 32.433297] ? vm_mmap_pgoff+0x15c/0x3a0 [ 32.433806] ? __pfx_arch_get_unmapped_area_topdown+0x10/0x10 [ 32.434507] ? __pfx_lock_acquire+0x10/0x10 [ 32.435031] ? __pfx_mmap_region+0x10/0x10 [ 32.435561] ? security_mmap_addr+0x7d/0xa0 [ 32.436086] ? get_unmapped_area+0x1f5/0x3f0 [ 32.436624] do_mmap+0x854/0xf00 [ 32.437060] vm_mmap_pgoff+0x1a6/0x3a0 [ 32.437577] ? __pfx_vm_mmap_pgoff+0x10/0x10 [ 32.438138] ksys_mmap_pgoff+0x3af/0x500 [ 32.438648] do_syscall_64+0x3f/0x90 [ 32.439123] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 32.439760] RIP: 0033:0x7f59990bad82 [ 32.440212] 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 [ 32.442345] RSP: 002b:00007ffda44ab968 EFLAGS: 00000206 ORIG_RAX: 0000000000000009 [ 32.443254] RAX: ffffffffffffffda RBX: 0000000000000812 RCX: 00007f59990bad82 [ 32.444102] RDX: 0000000000000005 RSI: 0000000000001000 RDI: 00007f59984f4000 [ 32.444937] RBP: 00007f59984f4000 R08: 0000000000000009 R09: 0000000000001000 [ 32.445786] R10: 0000000000000812 R11: 0000000000000206 R12: 000055ddd5aeab20 [ 32.446624] R13: 00007ffda44ab980 R14: 00007ffda44ab9b0 R15: 00007ffda44abd10 [ 32.447469] </TASK> [ 32.447759] [ 32.448015] Allocated by task 214: [ 32.448454] kasan_save_stack+0x22/0x50 [ 32.448965] kasan_set_track+0x25/0x30 [ 32.449473] __kasan_slab_alloc+0x59/0x70 [ 32.450003] kmem_cache_alloc+0x16b/0x370 [ 32.450527] vm_area_dup+0x20/0x160 [ 32.451029] __split_vma+0x170/0x950 [ 32.451579] split_vma+0xc6/0x110 [ 32.452087] mprotect_fixup+0x8d2/0xb30 [ 32.452657] do_mprotect_pkey+0x87e/0xd40 [ 32.453182] __x64_sys_mprotect+0x78/0xc0 [ 32.453720] do_syscall_64+0x3f/0x90 [ 32.454190] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 32.454829] [ 32.455044] Freed by task 214: [ 32.455438] kasan_save_stack+0x22/0x50 [ 32.455941] kasan_set_track+0x25/0x30 [ 32.456430] kasan_save_free_info+0x2b/0x50 [ 32.456960] __kasan_slab_free+0x10a/0x190 [ 32.457513] kmem_cache_free+0x10d/0x4d0 [ 32.458016] rcu_core+0x8c8/0x2860 [ 32.458456] __do_softirq+0x1b7/0x7d4 [ 32.458923] [ 32.459140] Last potentially related work creation: [ 32.459717] kasan_save_stack+0x22/0x50 [ 32.460217] __kasan_record_aux_stack+0x8e/0xa0 [ 32.460781] __call_rcu_common.constprop.0+0x6a/0xb90 [ 32.461428] remove_vma+0x139/0x170 [ 32.461879] do_vmi_align_munmap+0xd4a/0x11f0 [ 32.462429] do_vmi_munmap+0x1f1/0x2b0 [ 32.462909] __vm_munmap+0x138/0x3a0 [ 32.463371] __x64_sys_munmap+0x59/0x80 [ 32.463865] do_syscall_64+0x3f/0x90 [ 32.464337] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 32.464970] [ 32.465182] The buggy address belongs to the object at ffff88800f12a570 [ 32.465182] which belongs to the cache vm_area_struct of size 168 [ 32.466667] The buggy address is located 88 bytes inside of [ 32.466667] freed 168-byte region [ffff88800f12a570, ffff88800f12a618) [ 32.468072] [ 32.468287] The buggy address belongs to the physical page: [ 32.468942] page:0000000094f45721 refcount:1 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0xf12a [ 32.470035] memcg:ffff888015891201 [ 32.470465] flags: 0x100000000000200(slab|node=0|zone=1) [ 32.471106] page_type: 0xffffffff() [ 32.471553] raw: 0100000000000200 ffff88800879fc80 dead000000000122 0000000000000000 [ 32.472472] raw: 0000000000000000 0000000000110011 00000001ffffffff ffff888015891201 [ 32.473388] page dumped because: kasan: bad access detected [ 32.474127] [ 32.474395] Memory state around the buggy address: [ 32.474977] ffff88800f12a480: fc 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 [ 32.475908] ffff88800f12a500: 00 00 00 00 00 00 fc fc fc fc fc fc fc fc fa fb [ 32.476726] >ffff88800f12a580: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb [ 32.477552] ^ [ 32.478261] ffff88800f12a600: fb fb fb fc fc fc fc fc fc fc fc fa fb fb fb fb [ 32.479109] ffff88800f12a680: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb [ 32.479956] ================================================================== [ 32.480993] Disabling lock debugging due to kernel taint [ 35.139071] BUG: Bad rss-counter state mm:00000000b636595f type:MM_FILEPAGES val:33 [ 35.140327] BUG: Bad rss-counter state mm:00000000b636595f type:MM_ANONPAGES val:22 [ 35.518932] BUG: Bad rss-counter state mm:00000000a99c330e type:MM_FILEPAGES val:33 [ 35.520163] BUG: Bad rss-counter state mm:00000000a99c330e type:MM_ANONPAGES val:22 Warning: Permanently added '[localhost]:64478' (ECDSA) to the list of known hosts. 2023/06/20 07:16:01 fuzzer started 2023/06/20 07:16:02 dialing manager at localhost:44161 2023/06/20 07:16:02 checking machine... 2023/06/20 07:16:02 checking revisions... [ 36.276412] kmemleak: Automatic memory scanning thread ended 2023/06/20 07:16:02 testing simple program... [ 36.327949] cgroup: Unknown subsys name 'net' [ 36.367744] cgroup: Unknown subsys name 'rlimit' executing program executing program executing program VM DIAGNOSIS: 07:16:00 Registers: info registers vcpu 0 RAX=ffffffff86411cd1 RBX=0000000000000001 RCX=ffffffff86411ccc RDX=0000000000000000 RSI=0000000000000000 RDI=1ffffffff0c8239a RBP=ffff888015bdf900 RSP=ffff888015bdf838 R8 =ffffffff86411cd0 R9 =ffff888015bdf8e8 R10=0000000000038001 R11=000000000009a980 R12=ffff888015bdf908 R13=ffff888015bdf8f0 R14=ffff888015bdfd70 R15=ffff888015bdf8a8 RIP=ffffffff81131127 RFL=00000216 [----AP-] 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 00007f618a2b8900 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=00007f618a86d650 CR3=000000000c68c000 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=000000000000000000000000000000ff XMM02=000000000000000000000000000000ff XMM03=5320444f4854454d5f54505952434e45 XMM04=40404040404040404040404040404040 XMM05=5a5a5a5a5a5a5a5a5a5a5a5a5a5a5a5a XMM06=20202020202020202020202020202020 XMM07=00000000000000000000000000000000 XMM08=ffbc64ffffbc44ffffbc34ffffbc9f00 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=ffff888008c58400 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=00007fff1064e7d8 CR3=000000000d8a2000 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=2031303a36313a3730203032206e754a XMM01=73732878696e755f6d6170203a5d3033 XMM02=65736f6c63206e6f6973736573203a29 XMM03=755f6d6170203a5d3033325b64687373 XMM04=69662068637573206f4e203a656c6163 XMM05=3a656c696620766e65206e65706f206f XMM06=65733a6468737328766e655f6d617020 XMM07=6b7a79732031303a36313a3730203032 XMM08=3d656e696c646d632022656369767265 XMM09=00000000000000000000000000000000 XMM10=00000000000000000000000000000000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000