syzkaller login: [ 36.114645] BUG: Bad rss-counter state mm:00000000c30a82e4 type:MM_FILEPAGES val:33 [ 36.115730] BUG: Bad rss-counter state mm:00000000c30a82e4 type:MM_ANONPAGES val:22 [ 36.283487] ================================================================== [ 36.284441] BUG: KASAN: slab-use-after-free in vma_interval_tree_remove+0xc75/0xec0 [ 36.285558] Read of size 8 at addr ffff88800dd06228 by task sshd/220 [ 36.286456] [ 36.286781] CPU: 0 PID: 220 Comm: sshd Not tainted 6.4.0-rc7-next-20230619 #1 [ 36.287787] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS 1.12.0-1 04/01/2014 [ 36.288963] Call Trace: [ 36.289343] [ 36.289677] dump_stack_lvl+0x91/0xf0 [ 36.290256] print_report+0xcc/0x620 [ 36.290819] ? __virt_addr_valid+0x102/0x340 [ 36.291458] ? vma_interval_tree_remove+0xc75/0xec0 [ 36.292186] ? vma_interval_tree_remove+0xc75/0xec0 [ 36.292941] kasan_report+0xbe/0xf0 [ 36.293519] ? vma_interval_tree_remove+0xc75/0xec0 [ 36.294264] vma_interval_tree_remove+0xc75/0xec0 [ 36.294985] vma_prepare+0xc54/0x11a0 [ 36.295560] __split_vma+0x5af/0x950 [ 36.296124] ? __pfx___split_vma+0x10/0x10 [ 36.296766] ? find_held_lock+0x2c/0x110 [ 36.297415] do_vmi_align_munmap+0x2ba/0x11f0 [ 36.298095] ? lock_is_held_type+0x9f/0x120 [ 36.298744] ? __pfx_do_vmi_align_munmap+0x10/0x10 [ 36.299475] ? mtree_range_walk+0x632/0x900 [ 36.300134] ? mas_walk+0x5c7/0x7c0 [ 36.300705] do_vmi_munmap+0x1f1/0x2b0 [ 36.301310] mmap_region+0x1f9/0x2660 [ 36.301889] ? vm_mmap_pgoff+0x15c/0x3a0 [ 36.302511] ? __pfx_arch_get_unmapped_area_topdown+0x10/0x10 [ 36.303370] ? __pfx_lock_acquire+0x10/0x10 [ 36.304009] ? __pfx_mmap_region+0x10/0x10 [ 36.304646] ? security_mmap_addr+0x7d/0xa0 [ 36.305296] ? get_unmapped_area+0x1f5/0x3f0 [ 36.305952] do_mmap+0x854/0xf00 [ 36.306483] vm_mmap_pgoff+0x1a6/0x3a0 [ 36.307074] ? __pfx_vm_mmap_pgoff+0x10/0x10 [ 36.307742] ksys_mmap_pgoff+0x3af/0x500 [ 36.308351] do_syscall_64+0x3f/0x90 [ 36.308939] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 36.309714] RIP: 0033:0x7f0725cb2d82 [ 36.310259] 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 [ 36.312823] RSP: 002b:00007ffdbcd5f6e8 EFLAGS: 00000206 ORIG_RAX: 0000000000000009 [ 36.313917] RAX: ffffffffffffffda RBX: 0000000000000812 RCX: 00007f0725cb2d82 [ 36.314936] RDX: 0000000000000005 RSI: 0000000000001000 RDI: 00007f07250ec000 [ 36.315941] RBP: 00007f07250ec000 R08: 0000000000000009 R09: 0000000000001000 [ 36.316966] R10: 0000000000000812 R11: 0000000000000206 R12: 000055f6f3e6a980 [ 36.317998] R13: 00007ffdbcd5f700 R14: 00007ffdbcd5f730 R15: 00007ffdbcd5fa90 [ 36.319027] [ 36.319374] [ 36.319632] Allocated by task 212: [ 36.320144] kasan_save_stack+0x22/0x50 [ 36.320754] kasan_set_track+0x25/0x30 [ 36.321366] __kasan_slab_alloc+0x59/0x70 [ 36.321990] kmem_cache_alloc+0x16b/0x370 [ 36.322612] vm_area_dup+0x20/0x160 [ 36.323158] __split_vma+0x170/0x950 [ 36.323713] split_vma+0xc6/0x110 [ 36.324238] mprotect_fixup+0x8d2/0xb30 [ 36.324840] do_mprotect_pkey+0x87e/0xd40 [ 36.325477] __x64_sys_mprotect+0x78/0xc0 [ 36.326091] do_syscall_64+0x3f/0x90 [ 36.326660] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 36.327430] [ 36.327686] Freed by task 212: [ 36.328149] kasan_save_stack+0x22/0x50 [ 36.328751] kasan_set_track+0x25/0x30 [ 36.329360] kasan_save_free_info+0x2b/0x50 [ 36.329986] __kasan_slab_free+0x10a/0x190 [ 36.330612] kmem_cache_free+0x10d/0x4d0 [ 36.331213] rcu_core+0x8c8/0x2860 [ 36.331741] __do_softirq+0x1b7/0x7d4 [ 36.332313] [ 36.332573] Last potentially related work creation: [ 36.333273] kasan_save_stack+0x22/0x50 [ 36.333872] __kasan_record_aux_stack+0x8e/0xa0 [ 36.334547] __call_rcu_common.constprop.0+0x6a/0xb90 [ 36.335318] remove_vma+0x139/0x170 [ 36.335861] do_vmi_align_munmap+0xd4a/0x11f0 [ 36.336524] do_vmi_munmap+0x1f1/0x2b0 [ 36.337103] __vm_munmap+0x138/0x3a0 [ 36.337654] __x64_sys_munmap+0x59/0x80 [ 36.338238] do_syscall_64+0x3f/0x90 [ 36.338803] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 36.339564] [ 36.339819] Second to last potentially related work creation: [ 36.340631] kasan_save_stack+0x22/0x50 [ 36.341243] __kasan_record_aux_stack+0x8e/0xa0 [ 36.341928] __call_rcu_common.constprop.0+0x6a/0xb90 [ 36.342694] remove_vma+0x139/0x170 [ 36.343227] do_vmi_align_munmap+0xd4a/0x11f0 [ 36.343886] do_vmi_munmap+0x1f1/0x2b0 [ 36.344461] mmap_region+0x1f9/0x2660 [ 36.345034] do_mmap+0x854/0xf00 [ 36.345548] vm_mmap_pgoff+0x1a6/0x3a0 [ 36.346120] ksys_mmap_pgoff+0x3af/0x500 [ 36.346707] do_syscall_64+0x3f/0x90 [ 36.347253] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 36.348005] [ 36.348256] The buggy address belongs to the object at ffff88800dd061d0 [ 36.348256] which belongs to the cache vm_area_struct of size 168 [ 36.349971] The buggy address is located 88 bytes inside of [ 36.349971] freed 168-byte region [ffff88800dd061d0, ffff88800dd06278) [ 36.351605] [ 36.351856] The buggy address belongs to the physical page: [ 36.352626] page:00000000f90cab93 refcount:1 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0xdd06 [ 36.353927] memcg:ffff888014443d01 [ 36.354433] flags: 0x100000000000200(slab|node=0|zone=1) [ 36.355185] page_type: 0xffffffff() [ 36.355712] raw: 0100000000000200 ffff88800879fc80 ffffea000059f440 dead000000000002 [ 36.356788] raw: 0000000000000000 0000000000110011 00000001ffffffff ffff888014443d01 [ 36.357854] page dumped because: kasan: bad access detected [ 36.358622] [ 36.358871] Memory state around the buggy address: [ 36.359556] ffff88800dd06100: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb [ 36.360554] ffff88800dd06180: fb fb fc fc fc fc fc fc fc fc fa fb fb fb fb fb [ 36.361563] >ffff88800dd06200: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fc [ 36.362557] ^ [ 36.363202] ffff88800dd06280: fc fc fc fc fc fc fc 00 00 00 00 00 00 00 00 00 [ 36.364189] ffff88800dd06300: 00 00 00 00 00 00 00 00 00 00 00 00 fc fc fc fc [ 36.365191] ================================================================== [ 36.366473] Disabling lock debugging due to kernel taint [ 38.218251] BUG: Bad rss-counter state mm:00000000925dacc7 type:MM_FILEPAGES val:33 [ 38.219689] BUG: Bad rss-counter state mm:00000000925dacc7 type:MM_ANONPAGES val:22 [ 38.717879] BUG: Bad rss-counter state mm:000000009f953286 type:MM_FILEPAGES val:33 [ 38.719062] BUG: Bad rss-counter state mm:000000009f953286 type:MM_ANONPAGES val:22 Warning: Permanently added '[localhost]:56727' (ECDSA) to the list of known hosts. 2023/06/19 18:21:07 fuzzer started 2023/06/19 18:21:08 dialing manager at localhost:44161 2023/06/19 18:21:08 checking machine... 2023/06/19 18:21:08 checking revisions... [ 39.341551] kmemleak: Automatic memory scanning thread ended 2023/06/19 18:21:08 testing simple program... [ 39.382607] cgroup: Unknown subsys name 'net' [ 39.481065] cgroup: Unknown subsys name 'rlimit' executing program executing program executing program VM DIAGNOSIS: 18:21:02 Registers: info registers vcpu 0 RAX=0000000000000000 RBX=ffffffff85652988 RCX=0000000000000100 RDX=ffffffff8542a6c0 RSI=ffffffff814c84dd RDI=0000000000000005 RBP=0000000000000000 RSP=ffff88806ce09a20 R8 =0000000000000005 R9 =0000000000000000 R10=0000000000000000 R11=00000000000b5420 R12=0000000000000000 R13=0000000000000000 R14=ffffffff85652988 R15=ffff88800d252b30 RIP=ffffffff814c0811 RFL=00000206 [-----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 0000000000000000 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=00007fa058cf5a30 CR3=000000000e188000 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=2037303a31323a3831203931206e754a XMM01=73732878696e755f6d6170203a5d3932 XMM02=65736f6c63206e6f6973736573203a29 XMM03=755f6d6170203a5d3932325b64687373 XMM04=69662068637573206f4e203a656c6163 XMM05=3a656c696620766e65206e65706f206f XMM06=65733a6468737328766e655f6d617020 XMM07=6b7a79732037303a31323a3831203931 XMM08=3d656e696c646d632022656369767265 XMM09=00000000000000000000000000000000 XMM10=00000000000000000000000000000000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000 info registers vcpu 1 RAX=0000000000000000 RBX=0000000000000010 RCX=ffffffff8449f04f RDX=ffff888010021b40 RSI=0000000000000000 RDI=0000000000000000 RBP=ffff88800f2f7208 RSP=ffff8880099a7ce0 R8 =0000000000000000 R9 =0000000000000002 R10=0000000000000005 R11=0000000000000000 R12=0000000000000002 R13=0000000000000005 R14=00007ff159189008 R15=00007ff159162fff RIP=ffffffff814c01fc 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 =0000 0000000000000000 00000000 00000000 DS =0000 0000000000000000 00000000 00000000 FS =0000 00007ff1591bf900 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=00007ff159189008 CR3=000000001a4fc000 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=652022746f6f72223d74636361207469 XMM02=3d6c616e696d72657420322e322e302e XMM03=3d656d616e74736f682022646873732f XMM04=40404040404040404040404040404040 XMM05=5a5a5a5a5a5a5a5a5a5a5a5a5a5a5a5a XMM06=20202020202020202020202020202020 XMM07=00000000000000000000000000000000 XMM08=652075253d64692073253d706f000000 XMM09=00000000000000000000000000000000 XMM10=00000000000000000000000000000000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000