syzkaller login: [ 66.349048] BUG: Bad rss-counter state mm:0000000032717b66 type:MM_FILEPAGES val:33 [ 66.350075] BUG: Bad rss-counter state mm:0000000032717b66 type:MM_ANONPAGES val:22 [ 66.450360] ================================================================== [ 66.451024] BUG: KASAN: slab-use-after-free in vma_interval_tree_remove+0xc75/0xec0 [ 66.451717] Read of size 8 at addr ffff88800ec6b310 by task sshd/220 [ 66.452225] [ 66.452382] CPU: 1 PID: 220 Comm: sshd Not tainted 6.4.0-rc7-next-20230619 #1 [ 66.452968] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS 1.12.0-1 04/01/2014 [ 66.453630] Call Trace: [ 66.453843] [ 66.454038] dump_stack_lvl+0x91/0xf0 [ 66.454664] print_report+0xcc/0x620 [ 66.455001] ? __virt_addr_valid+0x102/0x340 [ 66.455361] ? vma_interval_tree_remove+0xc75/0xec0 [ 66.455826] ? vma_interval_tree_remove+0xc75/0xec0 [ 66.456258] kasan_report+0xbe/0xf0 [ 66.456573] ? vma_interval_tree_remove+0xc75/0xec0 [ 66.457052] vma_interval_tree_remove+0xc75/0xec0 [ 66.457454] vma_prepare+0xc54/0x11a0 [ 66.457776] __split_vma+0x5af/0x950 [ 66.458097] ? __pfx___split_vma+0x10/0x10 [ 66.458446] ? find_held_lock+0x2c/0x110 [ 66.458798] do_vmi_align_munmap+0x2ba/0x11f0 [ 66.459189] ? lock_is_held_type+0x9f/0x120 [ 66.459599] ? __pfx_do_vmi_align_munmap+0x10/0x10 [ 66.460002] ? mtree_range_walk+0x632/0x900 [ 66.460372] ? mas_walk+0x5c7/0x7c0 [ 66.460700] do_vmi_munmap+0x1f1/0x2b0 [ 66.461029] mmap_region+0x1f9/0x2660 [ 66.461354] ? vm_mmap_pgoff+0x15c/0x3a0 [ 66.461695] ? __pfx_arch_get_unmapped_area_topdown+0x10/0x10 [ 66.462170] ? __pfx_lock_acquire+0x10/0x10 [ 66.462523] ? __pfx_mmap_region+0x10/0x10 [ 66.462882] ? security_mmap_addr+0x7d/0xa0 [ 66.463256] ? get_unmapped_area+0x1f5/0x3f0 [ 66.463633] do_mmap+0x854/0xf00 [ 66.463922] vm_mmap_pgoff+0x1a6/0x3a0 [ 66.464232] ? __pfx_vm_mmap_pgoff+0x10/0x10 [ 66.464613] ksys_mmap_pgoff+0x3af/0x500 [ 66.464958] do_syscall_64+0x3f/0x90 [ 66.465287] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 66.465699] RIP: 0033:0x7f2fd3284d82 [ 66.465984] 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 [ 66.467333] RSP: 002b:00007ffc36cfbb08 EFLAGS: 00000206 ORIG_RAX: 0000000000000009 [ 66.467939] RAX: ffffffffffffffda RBX: 0000000000000812 RCX: 00007f2fd3284d82 [ 66.468471] RDX: 0000000000000005 RSI: 0000000000001000 RDI: 00007f2fd26be000 [ 66.468996] RBP: 00007f2fd26be000 R08: 0000000000000009 R09: 0000000000001000 [ 66.469507] R10: 0000000000000812 R11: 0000000000000206 R12: 000055c054b17f70 [ 66.470054] R13: 00007ffc36cfbb20 R14: 00007ffc36cfbb50 R15: 00007ffc36cfbeb0 [ 66.470634] [ 66.470835] [ 66.470989] Allocated by task 213: [ 66.471319] kasan_save_stack+0x22/0x50 [ 66.471768] kasan_set_track+0x25/0x30 [ 66.472090] __kasan_slab_alloc+0x59/0x70 [ 66.472415] kmem_cache_alloc+0x16b/0x370 [ 66.472772] vm_area_dup+0x20/0x160 [ 66.473076] __split_vma+0x170/0x950 [ 66.473383] split_vma+0xc6/0x110 [ 66.473672] mprotect_fixup+0x8d2/0xb30 [ 66.474000] do_mprotect_pkey+0x87e/0xd40 [ 66.474327] __x64_sys_mprotect+0x78/0xc0 [ 66.474659] do_syscall_64+0x3f/0x90 [ 66.474972] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 66.475386] [ 66.475549] Freed by task 213: [ 66.475797] kasan_save_stack+0x22/0x50 [ 66.476141] kasan_set_track+0x25/0x30 [ 66.476450] kasan_save_free_info+0x2b/0x50 [ 66.476775] __kasan_slab_free+0x10a/0x190 [ 66.477167] kmem_cache_free+0x10d/0x4d0 [ 66.477475] rcu_core+0x8c8/0x2860 [ 66.477750] __do_softirq+0x1b7/0x7d4 [ 66.478079] [ 66.478223] Last potentially related work creation: [ 66.478622] kasan_save_stack+0x22/0x50 [ 66.478999] __kasan_record_aux_stack+0x8e/0xa0 [ 66.479377] __call_rcu_common.constprop.0+0x6a/0xb90 [ 66.479845] remove_vma+0x139/0x170 [ 66.480141] do_vmi_align_munmap+0xd4a/0x11f0 [ 66.480494] do_vmi_munmap+0x1f1/0x2b0 [ 66.480802] __vm_munmap+0x138/0x3a0 [ 66.481111] __x64_sys_munmap+0x59/0x80 [ 66.481429] do_syscall_64+0x3f/0x90 [ 66.481733] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 66.482144] [ 66.482285] Second to last potentially related work creation: [ 66.482712] kasan_save_stack+0x22/0x50 [ 66.483024] __kasan_record_aux_stack+0x8e/0xa0 [ 66.483378] __call_rcu_common.constprop.0+0x6a/0xb90 [ 66.483797] remove_vma+0x139/0x170 [ 66.484098] do_vmi_align_munmap+0xd4a/0x11f0 [ 66.484483] do_vmi_munmap+0x1f1/0x2b0 [ 66.484831] mmap_region+0x1f9/0x2660 [ 66.485161] do_mmap+0x854/0xf00 [ 66.485497] vm_mmap_pgoff+0x1a6/0x3a0 [ 66.485822] ksys_mmap_pgoff+0x3af/0x500 [ 66.486199] do_syscall_64+0x3f/0x90 [ 66.486506] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 66.486921] [ 66.487061] The buggy address belongs to the object at ffff88800ec6b2b8 [ 66.487061] which belongs to the cache vm_area_struct of size 168 [ 66.488061] The buggy address is located 88 bytes inside of [ 66.488061] freed 168-byte region [ffff88800ec6b2b8, ffff88800ec6b360) [ 66.488955] [ 66.489089] The buggy address belongs to the physical page: [ 66.489490] page:00000000945fc0d7 refcount:1 mapcount:0 mapping:0000000000000000 index:0xffff88800ec6bbc8 pfn:0xec6b [ 66.490232] memcg:ffff888013f0ec01 [ 66.490504] flags: 0x100000000000200(slab|node=0|zone=1) [ 66.490952] page_type: 0xffffffff() [ 66.491249] raw: 0100000000000200 ffff88800879fc80 ffffea000025c3c0 dead000000000004 [ 66.491944] raw: ffff88800ec6bbc8 000000008011000f 00000001ffffffff ffff888013f0ec01 [ 66.492586] page dumped because: kasan: bad access detected [ 66.493007] [ 66.493148] Memory state around the buggy address: [ 66.493527] ffff88800ec6b200: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 fc [ 66.494075] ffff88800ec6b280: fc fc fc fc fc fc fc fa fb fb fb fb fb fb fb fb [ 66.494615] >ffff88800ec6b300: fb fb fb fb fb fb fb fb fb fb fb fb fc fc fc fc [ 66.495162] ^ [ 66.495630] ffff88800ec6b380: fc fc fc fc 00 00 00 00 00 00 00 00 00 00 00 00 [ 66.496153] ffff88800ec6b400: 00 00 00 00 00 00 00 00 00 fc fc fc fc fc fc fc [ 66.496688] ================================================================== [ 66.497383] Disabling lock debugging due to kernel taint [ 68.531667] BUG: Bad rss-counter state mm:00000000e86908b7 type:MM_FILEPAGES val:33 [ 68.532453] BUG: Bad rss-counter state mm:00000000e86908b7 type:MM_ANONPAGES val:22 [ 68.859063] BUG: Bad rss-counter state mm:00000000c1e0c863 type:MM_FILEPAGES val:33 [ 68.859811] BUG: Bad rss-counter state mm:00000000c1e0c863 type:MM_ANONPAGES val:22 Warning: Permanently added '[localhost]:42506' (ECDSA) to the list of known hosts. 2023/06/20 09:27:45 fuzzer started 2023/06/20 09:27:46 dialing manager at localhost:44161 2023/06/20 09:27:46 checking machine... 2023/06/20 09:27:46 checking revisions... [ 69.440586] kmemleak: Automatic memory scanning thread ended 2023/06/20 09:27:46 testing simple program... [ 69.484342] cgroup: Unknown subsys name 'net' [ 69.516892] cgroup: Unknown subsys name 'rlimit' executing program executing program executing program VM DIAGNOSIS: 09:27:40 Registers: info registers vcpu 0 RAX=dffffc0000000000 RBX=1ffff11003194f6c RCX=ffffffff8452696f RDX=0000000000000001 RSI=0000000000000008 RDI=ffff88801964a148 RBP=ffff88801964a148 RSP=ffff888018ca7b38 R8 =0000000000000001 R9 =ffff88801964a14f R10=ffff88801964a14f R11=0000000000000000 R12=dffffc0000000000 R13=ffff88801964a148 R14=ffff888018ca7db0 R15=ffff888018ca7e00 RIP=ffffffff8180ef09 RFL=00000212 [----A--] 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 00007fdabff18700 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=00007fff96363698 CR3=000000000da40000 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=2035343a37323a3930203032206e754a XMM01=73732878696e755f6d6170203a5d3932 XMM02=65736f6c63206e6f6973736573203a29 XMM03=755f6d6170203a5d3932325b64687373 XMM04=69662068637573206f4e203a656c6163 XMM05=3a656c696620766e65206e65706f206f XMM06=65733a6468737328766e655f6d617020 XMM07=6b7a79732035343a37323a3930203032 XMM08=3d656e696c646d632022656369767265 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=00007f3fc755b970 CR3=000000000d6aa000 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=00000000000000000000000000000000 XMM01=cff3bef748548286bf4dddc9b0e50e35 XMM02=2c67c8bc2e329bc3000000000011cfa8 XMM03=fb795ef6d65770560000000000124448 XMM04=2cc10eedfa2d778000000000000ae988 XMM05=19e9129bd510f2350000000000135288 XMM06=e6de5933dbb804b500000000001340f0 XMM07=e042d86d42eb936e00000000001246c8 XMM08=404349dc41412bb3000000000011d008 XMM09=00000000000000000000000000000000 XMM10=20200000000020202020202020200000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000