syzkaller login: [ 39.339196] BUG: Bad rss-counter state mm:00000000f474f76a type:MM_FILEPAGES val:33 [ 39.340373] BUG: Bad rss-counter state mm:00000000f474f76a type:MM_ANONPAGES val:22 [ 39.492678] ================================================================== [ 39.493603] BUG: KASAN: slab-use-after-free in vma_interval_tree_remove+0xc75/0xec0 [ 39.494554] Read of size 8 at addr ffff88800ef96968 by task sshd/220 [ 39.495331] [ 39.495549] CPU: 0 PID: 220 Comm: sshd Not tainted 6.4.0-rc7-next-20230619 #1 [ 39.496499] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS 1.12.0-1 04/01/2014 [ 39.497458] Call Trace: [ 39.497783] [ 39.498089] dump_stack_lvl+0x91/0xf0 [ 39.498583] print_report+0xcc/0x620 [ 39.499077] ? __virt_addr_valid+0x102/0x340 [ 39.499632] ? vma_interval_tree_remove+0xc75/0xec0 [ 39.500251] ? vma_interval_tree_remove+0xc75/0xec0 [ 39.500866] kasan_report+0xbe/0xf0 [ 39.501342] ? vma_interval_tree_remove+0xc75/0xec0 [ 39.501965] vma_interval_tree_remove+0xc75/0xec0 [ 39.502603] vma_prepare+0xc54/0x11a0 [ 39.503080] __split_vma+0x5af/0x950 [ 39.503550] ? __pfx___split_vma+0x10/0x10 [ 39.504076] ? find_held_lock+0x2c/0x110 [ 39.504591] do_vmi_align_munmap+0x2ba/0x11f0 [ 39.505151] ? lock_is_held_type+0x9f/0x120 [ 39.505689] ? __pfx_do_vmi_align_munmap+0x10/0x10 [ 39.506298] ? mtree_range_walk+0x632/0x900 [ 39.506851] ? mas_walk+0x5c7/0x7c0 [ 39.507329] do_vmi_munmap+0x1f1/0x2b0 [ 39.507827] mmap_region+0x1f9/0x2660 [ 39.508308] ? vm_mmap_pgoff+0x15c/0x3a0 [ 39.508823] ? __pfx_arch_get_unmapped_area_topdown+0x10/0x10 [ 39.509546] ? __pfx_lock_acquire+0x10/0x10 [ 39.510084] ? __pfx_mmap_region+0x10/0x10 [ 39.510612] ? security_mmap_addr+0x7d/0xa0 [ 39.511143] ? get_unmapped_area+0x1f5/0x3f0 [ 39.511690] do_mmap+0x854/0xf00 [ 39.512127] vm_mmap_pgoff+0x1a6/0x3a0 [ 39.512620] ? __pfx_vm_mmap_pgoff+0x10/0x10 [ 39.513179] ksys_mmap_pgoff+0x3af/0x500 [ 39.513684] do_syscall_64+0x3f/0x90 [ 39.514175] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 39.514818] RIP: 0033:0x7fa54f2c6d82 [ 39.515270] 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 [ 39.517403] RSP: 002b:00007fffabe23be8 EFLAGS: 00000206 ORIG_RAX: 0000000000000009 [ 39.518320] RAX: ffffffffffffffda RBX: 0000000000000812 RCX: 00007fa54f2c6d82 [ 39.519168] RDX: 0000000000000005 RSI: 0000000000001000 RDI: 00007fa54e700000 [ 39.520010] RBP: 00007fa54e700000 R08: 0000000000000009 R09: 0000000000001000 [ 39.520854] R10: 0000000000000812 R11: 0000000000000206 R12: 000055fd5611bf70 [ 39.521700] R13: 00007fffabe23c00 R14: 00007fffabe23c30 R15: 00007fffabe23f90 [ 39.522556] [ 39.522855] [ 39.523068] Allocated by task 213: [ 39.523497] kasan_save_stack+0x22/0x50 [ 39.524002] kasan_set_track+0x25/0x30 [ 39.524492] __kasan_slab_alloc+0x59/0x70 [ 39.525016] kmem_cache_alloc+0x16b/0x370 [ 39.525529] vm_area_dup+0x20/0x160 [ 39.525985] __split_vma+0x170/0x950 [ 39.526464] split_vma+0xc6/0x110 [ 39.526902] mprotect_fixup+0x8d2/0xb30 [ 39.527400] do_mprotect_pkey+0x87e/0xd40 [ 39.527921] __x64_sys_mprotect+0x78/0xc0 [ 39.528444] do_syscall_64+0x3f/0x90 [ 39.528918] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 39.529563] [ 39.529779] Freed by task 213: [ 39.530178] kasan_save_stack+0x22/0x50 [ 39.530682] kasan_set_track+0x25/0x30 [ 39.531176] kasan_save_free_info+0x2b/0x50 [ 39.531709] __kasan_slab_free+0x10a/0x190 [ 39.532238] kmem_cache_free+0x10d/0x4d0 [ 39.532744] rcu_core+0x8c8/0x2860 [ 39.533185] __do_softirq+0x1b7/0x7d4 [ 39.533665] [ 39.533880] Last potentially related work creation: [ 39.534475] kasan_save_stack+0x22/0x50 [ 39.534977] __kasan_record_aux_stack+0x8e/0xa0 [ 39.535549] __call_rcu_common.constprop.0+0x6a/0xb90 [ 39.536199] remove_vma+0x139/0x170 [ 39.536655] do_vmi_align_munmap+0xd4a/0x11f0 [ 39.537215] do_vmi_munmap+0x1f1/0x2b0 [ 39.537702] __vm_munmap+0x138/0x3a0 [ 39.538182] __x64_sys_munmap+0x59/0x80 [ 39.538677] do_syscall_64+0x3f/0x90 [ 39.539151] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 39.539796] [ 39.540011] The buggy address belongs to the object at ffff88800ef96910 [ 39.540011] which belongs to the cache vm_area_struct of size 168 [ 39.541478] The buggy address is located 88 bytes inside of [ 39.541478] freed 168-byte region [ffff88800ef96910, ffff88800ef969b8) [ 39.542883] [ 39.543098] The buggy address belongs to the physical page: [ 39.543760] page:00000000357ab373 refcount:1 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0xef96 [ 39.544842] memcg:ffff88800ec9ba01 [ 39.545267] anon flags: 0x100000000000200(slab|node=0|zone=1) [ 39.545964] page_type: 0xffffffff() [ 39.546419] raw: 0100000000000200 ffff88800879fc80 ffffea0000383340 dead000000000007 [ 39.547341] raw: 0000000000000000 0000000000110011 00000001ffffffff ffff88800ec9ba01 [ 39.548243] page dumped because: kasan: bad access detected [ 39.548917] [ 39.549135] Memory state around the buggy address: [ 39.549738] ffff88800ef96800: fc fc fc fc fc fa fb fb fb fb fb fb fb fb fb fb [ 39.550604] ffff88800ef96880: fb fb fb fb fb fb fb fb fb fb fc fc fc fc fc fc [ 39.551460] >ffff88800ef96900: fc fc fa fb fb fb fb fb fb fb fb fb fb fb fb fb [ 39.552310] ^ [ 39.553104] ffff88800ef96980: fb fb fb fb fb fb fb fc fc fc fc fc fc fc fc 00 [ 39.553964] ffff88800ef96a00: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 [ 39.554816] ================================================================== [ 39.555775] Disabling lock debugging due to kernel taint [ 42.351133] BUG: Bad rss-counter state mm:0000000004fe9355 type:MM_FILEPAGES val:33 [ 42.352343] BUG: Bad rss-counter state mm:0000000004fe9355 type:MM_ANONPAGES val:22 [ 42.826417] BUG: Bad rss-counter state mm:000000007c920efd type:MM_FILEPAGES val:33 [ 42.827602] BUG: Bad rss-counter state mm:000000007c920efd type:MM_ANONPAGES val:22 Warning: Permanently added '[localhost]:60644' (ECDSA) to the list of known hosts. 2023/06/19 15:19:01 fuzzer started 2023/06/19 15:19:01 dialing manager at localhost:44161 2023/06/19 15:19:01 checking machine... 2023/06/19 15:19:01 checking revisions... [ 43.493622] kmemleak: Automatic memory scanning thread ended 2023/06/19 15:19:01 testing simple program... [ 43.548373] cgroup: Unknown subsys name 'net' [ 43.589718] cgroup: Unknown subsys name 'rlimit' executing program executing program executing program VM DIAGNOSIS: 15:19:00 Registers: info registers vcpu 0 RAX=00007f7453624770 RBX=0000000000000026 RCX=0000000000000000 RDX=00000000649071e4 RSI=00007f74536247c0 RDI=00007f7453624770 RBP=000055bfea21e1c0 RSP=00007f74536246f0 R8 =0000000000000013 R9 =0000000000000640 R10=a3d70a3d70a3d70b R11=2ce33e6c02ce33e7 R12=000000000000004e R13=0000000000001fa0 R14=00007f744c000ba0 R15=0000000000000003 RIP=000055bfe9ba01d2 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 00007f7453628700 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=00007ff3dfc5a650 CR3=00000000100e8000 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=ffffffffffffffffffffffffff000000 XMM01=00000000000000003043545500435455 XMM02=63736964203a31313a34383133332074 XMM03=66207463656e6e6f6373696420646576 XMM04=6456774875434142334f726f59427469 XMM05=485320415352203a3268737320343831 XMM06=206d6f726620746f6f7220726f662079 XMM07=00000000000000000000000000000000 XMM08=3a677562656420676f6c737973720000 XMM09=00000000000000000000000000000000 XMM10=00000000000000000000000000000000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000 info registers vcpu 1 RAX=1ffffffff0bbf941 RBX=ffffffff85dfca08 RCX=ffffffff8180c521 RDX=0000000000000000 RSI=ffffffff86137508 RDI=ffffffff85dfc9fc RBP=ffffffff85dfc9fc RSP=ffff888008e578c0 R8 =ffffffff86137508 R9 =ffff888008e579b8 R10=0000000000038001 R11=0000000000020d8a R12=ffffffff85dfca18 R13=ffffffff85dfc9fc R14=ffffffff85dfc9fc R15=dffffc0000000000 RIP=ffffffff8112fc7f 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 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=00007f3dfd5857a0 CR3=000000000cda2000 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=0717458b914a2682574d22f76677bf58 XMM02=ec2efd57dc4c00df000000000011d9e8 XMM03=de9ec2e2a18530ec000000000011dab8 XMM04=fa42b7b1598e770300000000000ae988 XMM05=33731f346141cbd800000000001354b8 XMM06=4fda316b135da52b0000000000133f38 XMM07=fb795ef6d65770560000000000124800 XMM08=2c67c8bc2e329bc3000000000011da58 XMM09=00000000000000000000000000000000 XMM10=20200000000020202020202020200000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000