syzkaller login: [ 29.214238] BUG: Bad rss-counter state mm:00000000bbb99d3e type:MM_FILEPAGES val:33 [ 29.215396] BUG: Bad rss-counter state mm:00000000bbb99d3e type:MM_ANONPAGES val:22 [ 29.255768] ================================================================== [ 29.256694] BUG: KASAN: slab-use-after-free in vma_interval_tree_remove+0xc75/0xec0 [ 29.257902] Read of size 8 at addr ffff88800ec89968 by task sshd/220 [ 29.258737] [ 29.258991] CPU: 1 PID: 220 Comm: sshd Not tainted 6.4.0-rc7-next-20230620 #1 [ 29.260016] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS 1.12.0-1 04/01/2014 [ 29.261080] Call Trace: [ 29.261423] [ 29.261770] dump_stack_lvl+0x91/0xf0 [ 29.262277] print_report+0xcc/0x620 [ 29.262761] ? __virt_addr_valid+0x102/0x340 [ 29.263377] ? vma_interval_tree_remove+0xc75/0xec0 [ 29.264101] ? vma_interval_tree_remove+0xc75/0xec0 [ 29.264846] kasan_report+0xbe/0xf0 [ 29.265324] ? vma_interval_tree_remove+0xc75/0xec0 [ 29.265967] vma_interval_tree_remove+0xc75/0xec0 [ 29.266594] vma_prepare+0xc54/0x11a0 [ 29.267121] __split_vma+0x5af/0x950 [ 29.267599] ? __pfx___split_vma+0x10/0x10 [ 29.268128] ? find_held_lock+0x2c/0x110 [ 29.268647] do_vmi_align_munmap+0x2ba/0x11f0 [ 29.269223] ? lock_is_held_type+0x9f/0x120 [ 29.269769] ? __pfx_do_vmi_align_munmap+0x10/0x10 [ 29.270404] ? mtree_range_walk+0x632/0x900 [ 29.270993] ? mas_walk+0x5c7/0x7c0 [ 29.271470] do_vmi_munmap+0x1f1/0x2b0 [ 29.271979] mmap_region+0x1f9/0x2660 [ 29.272466] ? vm_mmap_pgoff+0x15c/0x3a0 [ 29.272973] ? __pfx_arch_get_unmapped_area_topdown+0x10/0x10 [ 29.273699] ? __pfx_lock_acquire+0x10/0x10 [ 29.274261] ? __pfx_mmap_region+0x10/0x10 [ 29.274805] ? security_mmap_addr+0x7d/0xa0 [ 29.275384] ? get_unmapped_area+0x1f5/0x3f0 [ 29.275934] do_mmap+0x854/0xf00 [ 29.276374] vm_mmap_pgoff+0x1a6/0x3a0 [ 29.276868] ? __pfx_vm_mmap_pgoff+0x10/0x10 [ 29.277439] ksys_mmap_pgoff+0x3af/0x500 [ 29.277948] do_syscall_64+0x3f/0x90 [ 29.278455] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 29.279144] RIP: 0033:0x7f85696ded82 [ 29.279607] 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 [ 29.281760] RSP: 002b:00007ffd39657868 EFLAGS: 00000206 ORIG_RAX: 0000000000000009 [ 29.282684] RAX: ffffffffffffffda RBX: 0000000000000812 RCX: 00007f85696ded82 [ 29.283529] RDX: 0000000000000005 RSI: 0000000000001000 RDI: 00007f8568b18000 [ 29.284377] RBP: 00007f8568b18000 R08: 0000000000000009 R09: 0000000000001000 [ 29.285269] R10: 0000000000000812 R11: 0000000000000206 R12: 0000561841982d90 [ 29.286147] R13: 00007ffd39657880 R14: 00007ffd396578b0 R15: 00007ffd39657c10 [ 29.287030] [ 29.287326] [ 29.287542] Allocated by task 212: [ 29.287975] kasan_save_stack+0x22/0x50 [ 29.288485] kasan_set_track+0x25/0x30 [ 29.289019] __kasan_slab_alloc+0x59/0x70 [ 29.289548] kmem_cache_alloc+0x16b/0x370 [ 29.290081] vm_area_dup+0x20/0x160 [ 29.290540] __split_vma+0x170/0x950 [ 29.291008] split_vma+0xc6/0x110 [ 29.291452] mprotect_fixup+0x8d2/0xb30 [ 29.291960] do_mprotect_pkey+0x87e/0xd40 [ 29.292481] __x64_sys_mprotect+0x78/0xc0 [ 29.293045] do_syscall_64+0x3f/0x90 [ 29.293521] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 29.294194] [ 29.294411] Freed by task 13: [ 29.294793] kasan_save_stack+0x22/0x50 [ 29.295304] kasan_set_track+0x25/0x30 [ 29.295797] kasan_save_free_info+0x2b/0x50 [ 29.296338] __kasan_slab_free+0x10a/0x190 [ 29.296900] kmem_cache_free+0x10d/0x4d0 [ 29.297435] rcu_core+0x8c8/0x2860 [ 29.297889] __do_softirq+0x1b7/0x7d4 [ 29.298392] [ 29.298609] Last potentially related work creation: [ 29.299196] kasan_save_stack+0x22/0x50 [ 29.299751] __kasan_record_aux_stack+0x8e/0xa0 [ 29.300332] __call_rcu_common.constprop.0+0x6a/0xb90 [ 29.301017] remove_vma+0x139/0x170 [ 29.301471] do_vmi_align_munmap+0xd4a/0x11f0 [ 29.302054] do_vmi_munmap+0x1f1/0x2b0 [ 29.302605] __vm_munmap+0x138/0x3a0 [ 29.303148] __x64_sys_munmap+0x59/0x80 [ 29.303655] do_syscall_64+0x3f/0x90 [ 29.304131] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 29.304773] [ 29.305029] The buggy address belongs to the object at ffff88800ec89910 [ 29.305029] which belongs to the cache vm_area_struct of size 168 [ 29.306519] The buggy address is located 88 bytes inside of [ 29.306519] freed 168-byte region [ffff88800ec89910, ffff88800ec899b8) [ 29.307937] [ 29.308152] The buggy address belongs to the physical page: [ 29.308837] page:0000000092356bfd refcount:1 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0xec89 [ 29.309982] memcg:ffff88800e73af01 [ 29.310419] flags: 0x100000000000200(slab|node=0|zone=1) [ 29.311087] page_type: 0xffffffff() [ 29.311533] raw: 0100000000000200 ffff8880087a0c80 ffffea000031b640 dead000000000006 [ 29.312478] raw: 0000000000000000 0000000000110011 00000001ffffffff ffff88800e73af01 [ 29.313444] page dumped because: kasan: bad access detected [ 29.314141] [ 29.314358] Memory state around the buggy address: [ 29.314955] ffff88800ec89800: fc fc fc fc fc 00 00 00 00 00 00 00 00 00 00 00 [ 29.315826] ffff88800ec89880: 00 00 00 00 00 00 00 00 00 00 fc fc fc fc fc fc [ 29.316701] >ffff88800ec89900: fc fc fa fb fb fb fb fb fb fb fb fb fb fb fb fb [ 29.317595] ^ [ 29.318403] ffff88800ec89980: fb fb fb fb fb fb fb fc fc fc fc fc fc fc fc fa [ 29.319283] ffff88800ec89a00: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb [ 29.320164] ================================================================== [ 29.321096] Disabling lock debugging due to kernel taint [ 32.085442] BUG: Bad rss-counter state mm:00000000ee6ccf08 type:MM_FILEPAGES val:33 [ 32.086614] BUG: Bad rss-counter state mm:00000000ee6ccf08 type:MM_ANONPAGES val:22 [ 32.486238] BUG: Bad rss-counter state mm:00000000766821b1 type:MM_FILEPAGES val:33 [ 32.487252] BUG: Bad rss-counter state mm:00000000766821b1 type:MM_ANONPAGES val:22 Warning: Permanently added '[localhost]:26198' (ECDSA) to the list of known hosts. 2023/06/21 04:57:33 fuzzer started 2023/06/21 04:57:33 dialing manager at localhost:36067 2023/06/21 04:57:33 checking machine... 2023/06/21 04:57:33 checking revisions... [ 33.193597] kmemleak: Automatic memory scanning thread ended 2023/06/21 04:57:33 testing simple program... [ 33.250885] cgroup: Unknown subsys name 'net' [ 33.307636] cgroup: Unknown subsys name 'rlimit' executing program executing program executing program VM DIAGNOSIS: 04:57:33 Registers: info registers vcpu 0 RAX=1ffffffff0bfc924 RBX=ffffffff85fe4920 RCX=ffffffff83c1130b RDX=0000000000000000 RSI=ffffffff86412c12 RDI=ffffffff85fe4920 RBP=ffffffff85fe4920 RSP=ffff888009e8f230 R8 =ffffffff86412c12 R9 =ffff888009e8f328 R10=0000000000038001 R11=000000000009a7d7 R12=ffffffff85fe4920 R13=ffffffff85fe4920 R14=ffffffff85fe4920 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 00007f85a07e7700 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=00007f334b591618 CR3=0000000009882000 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=6d6f72662064657463656e6e6f637369 XMM02=2e303120746f6f722072657375206d6f XMM03=3a5d3932325b646873732032333a3735 XMM04=6456774875434142334f726f59427469 XMM05=485320415352203a3268737320383833 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=ffff88806cf35000 RBX=0000000000000001 RCX=ffffffff8451250e RDX=ffffed100d9e6a01 RSI=0000000000000004 RDI=ffffffff81288ac5 RBP=dffffc0000000000 RSP=ffff888008e07e70 R8 =0000000000000000 R9 =ffffed100d9e6a00 R10=ffff88806cf35003 R11=0000000000000001 R12=ffffffff85d3d350 R13=1ffff110011c0fd3 R14=0000000000000000 R15=0000000000000000 RIP=ffffffff8451349f 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=00007f894cbc4fe0 CR3=0000000009882000 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=2032333a37353a3430203132206e754a XMM01=73732878696e755f6d6170203a5d3932 XMM02=65736f6c63206e6f6973736573203a29 XMM03=755f6d6170203a5d3932325b64687373 XMM04=69662068637573206f4e203a656c6163 XMM05=3a656c696620766e65206e65706f206f XMM06=65733a6468737328766e655f6d617020 XMM07=6b7a79732032333a37353a3430203132 XMM08=3d656e696c646d632022656369767265 XMM09=00000000000000000000000000000000 XMM10=00000000000000000000000000000000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000