syzkaller login: [ 42.432534] BUG: Bad rss-counter state mm:000000006428a7df type:MM_FILEPAGES val:33 [ 42.433564] BUG: Bad rss-counter state mm:000000006428a7df type:MM_ANONPAGES val:22 [ 42.591558] ================================================================== [ 42.592470] BUG: KASAN: slab-use-after-free in vma_interval_tree_remove+0xc75/0xec0 [ 42.593423] Read of size 8 at addr ffff88800d730df0 by task sshd/220 [ 42.594335] [ 42.594555] CPU: 1 PID: 220 Comm: sshd Not tainted 6.4.0-rc7-next-20230619 #1 [ 42.595451] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS 1.12.0-1 04/01/2014 [ 42.596427] Call Trace: [ 42.596751] [ 42.597033] dump_stack_lvl+0x91/0xf0 [ 42.597542] print_report+0xcc/0x620 [ 42.598049] ? __virt_addr_valid+0x102/0x340 [ 42.598606] ? vma_interval_tree_remove+0xc75/0xec0 [ 42.599257] ? vma_interval_tree_remove+0xc75/0xec0 [ 42.599877] kasan_report+0xbe/0xf0 [ 42.600370] ? vma_interval_tree_remove+0xc75/0xec0 [ 42.600992] vma_interval_tree_remove+0xc75/0xec0 [ 42.601638] vma_prepare+0xc54/0x11a0 [ 42.602167] __split_vma+0x5af/0x950 [ 42.602639] ? __pfx___split_vma+0x10/0x10 [ 42.603203] ? find_held_lock+0x2c/0x110 [ 42.603734] do_vmi_align_munmap+0x2ba/0x11f0 [ 42.604330] ? lock_is_held_type+0x9f/0x120 [ 42.604877] ? __pfx_do_vmi_align_munmap+0x10/0x10 [ 42.605517] ? mtree_range_walk+0x632/0x900 [ 42.606094] ? mas_walk+0x5c7/0x7c0 [ 42.606580] do_vmi_munmap+0x1f1/0x2b0 [ 42.607083] mmap_region+0x1f9/0x2660 [ 42.607594] ? vm_mmap_pgoff+0x15c/0x3a0 [ 42.608131] ? __pfx_arch_get_unmapped_area_topdown+0x10/0x10 [ 42.608870] ? __pfx_lock_acquire+0x10/0x10 [ 42.609437] ? __pfx_mmap_region+0x10/0x10 [ 42.609995] ? security_mmap_addr+0x7d/0xa0 [ 42.610562] ? get_unmapped_area+0x1f5/0x3f0 [ 42.611130] do_mmap+0x854/0xf00 [ 42.611598] vm_mmap_pgoff+0x1a6/0x3a0 [ 42.612108] ? __pfx_vm_mmap_pgoff+0x10/0x10 [ 42.612683] ksys_mmap_pgoff+0x3af/0x500 [ 42.613210] do_syscall_64+0x3f/0x90 [ 42.613706] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 42.614374] RIP: 0033:0x7f0f1f3f2d82 [ 42.614831] 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 [ 42.616990] RSP: 002b:00007ffd692ba138 EFLAGS: 00000206 ORIG_RAX: 0000000000000009 [ 42.617929] RAX: ffffffffffffffda RBX: 0000000000000812 RCX: 00007f0f1f3f2d82 [ 42.618961] RDX: 0000000000000005 RSI: 0000000000001000 RDI: 00007f0f1e82c000 [ 42.620098] RBP: 00007f0f1e82c000 R08: 0000000000000009 R09: 0000000000001000 [ 42.621223] R10: 0000000000000812 R11: 0000000000000206 R12: 00005645d3122ec0 [ 42.622378] R13: 00007ffd692ba150 R14: 00007ffd692ba180 R15: 00007ffd692ba4e0 [ 42.623410] [ 42.623709] [ 42.623928] Allocated by task 213: [ 42.624388] kasan_save_stack+0x22/0x50 [ 42.624892] kasan_set_track+0x25/0x30 [ 42.625500] __kasan_slab_alloc+0x59/0x70 [ 42.626128] kmem_cache_alloc+0x16b/0x370 [ 42.626652] vm_area_dup+0x20/0x160 [ 42.627123] __split_vma+0x170/0x950 [ 42.627598] split_vma+0xc6/0x110 [ 42.628044] mprotect_fixup+0x8d2/0xb30 [ 42.628580] do_mprotect_pkey+0x87e/0xd40 [ 42.629112] __x64_sys_mprotect+0x78/0xc0 [ 42.629645] do_syscall_64+0x3f/0x90 [ 42.630164] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 42.630798] [ 42.631014] Freed by task 19: [ 42.631423] kasan_save_stack+0x22/0x50 [ 42.631930] kasan_set_track+0x25/0x30 [ 42.632458] kasan_save_free_info+0x2b/0x50 [ 42.632993] __kasan_slab_free+0x10a/0x190 [ 42.633546] kmem_cache_free+0x10d/0x4d0 [ 42.634075] rcu_core+0x8c8/0x2860 [ 42.634535] __do_softirq+0x1b7/0x7d4 [ 42.635009] [ 42.635277] Last potentially related work creation: [ 42.635868] kasan_save_stack+0x22/0x50 [ 42.636400] __kasan_record_aux_stack+0x8e/0xa0 [ 42.636970] __call_rcu_common.constprop.0+0x6a/0xb90 [ 42.637626] remove_vma+0x139/0x170 [ 42.638117] do_vmi_align_munmap+0xd4a/0x11f0 [ 42.638678] do_vmi_munmap+0x1f1/0x2b0 [ 42.639186] __vm_munmap+0x138/0x3a0 [ 42.639653] __x64_sys_munmap+0x59/0x80 [ 42.640179] do_syscall_64+0x3f/0x90 [ 42.640661] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 42.641323] [ 42.641544] The buggy address belongs to the object at ffff88800d730d98 [ 42.641544] which belongs to the cache vm_area_struct of size 168 [ 42.643023] The buggy address is located 88 bytes inside of [ 42.643023] freed 168-byte region [ffff88800d730d98, ffff88800d730e40) [ 42.644466] [ 42.644686] The buggy address belongs to the physical page: [ 42.645360] page:00000000d242b5c8 refcount:1 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0xd730 [ 42.646465] memcg:ffff888019edf901 [ 42.646893] flags: 0x100000000000200(slab|node=0|zone=1) [ 42.647550] page_type: 0xffffffff() [ 42.648004] raw: 0100000000000200 ffff88800879fc80 dead000000000122 0000000000000000 [ 42.648955] raw: 0000000000000000 0000000000110011 00000001ffffffff ffff888019edf901 [ 42.649907] page dumped because: kasan: bad access detected [ 42.650579] [ 42.650795] Memory state around the buggy address: [ 42.651387] ffff88800d730c80: fc fc fc fc fc fc 00 00 00 00 00 00 00 00 00 00 [ 42.652281] ffff88800d730d00: 00 00 00 00 00 00 00 00 00 00 00 fc fc fc fc fc [ 42.653157] >ffff88800d730d80: fc fc fc fa fb fb fb fb fb fb fb fb fb fb fb fb [ 42.654018] ^ [ 42.654842] ffff88800d730e00: fb fb fb fb fb fb fb fb fc fc fc fc fc fc fc fc [ 42.655707] ffff88800d730e80: fa fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb [ 42.656580] ================================================================== [ 42.657502] Disabling lock debugging due to kernel taint [ 44.988977] BUG: Bad rss-counter state mm:00000000e7095f68 type:MM_FILEPAGES val:33 [ 44.990063] BUG: Bad rss-counter state mm:00000000e7095f68 type:MM_ANONPAGES val:22 [ 45.471113] BUG: Bad rss-counter state mm:00000000dd48cdf0 type:MM_FILEPAGES val:33 [ 45.472186] BUG: Bad rss-counter state mm:00000000dd48cdf0 type:MM_ANONPAGES val:22 Warning: Permanently added '[localhost]:57126' (ECDSA) to the list of known hosts. 2023/06/19 20:02:12 fuzzer started 2023/06/19 20:02:12 dialing manager at localhost:44161 2023/06/19 20:02:12 checking machine... 2023/06/19 20:02:12 checking revisions... [ 46.260675] kmemleak: Automatic memory scanning thread ended 2023/06/19 20:02:13 testing simple program... [ 46.314681] cgroup: Unknown subsys name 'net' [ 46.373391] cgroup: Unknown subsys name 'rlimit' executing program executing program executing program VM DIAGNOSIS: 20:02:00 Registers: info registers vcpu 0 RAX=dffffc0000000000 RBX=ffff88806ce09b40 RCX=0000000000000001 RDX=1ffff1100d9c1368 RSI=ffffffff83c22ffc RDI=ffff88806ce09b4c RBP=0000000000000012 RSP=ffff88806ce09a58 R8 =0000000000000001 R9 =ffff88806ce09ab8 R10=0000000000038001 R11=000000000008b93b R12=ffff88806ce09b40 R13=0000000000000000 R14=ffff88801468d1c0 R15=ffff88800d643c00 RIP=ffffffff813ad4d5 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 =0018 0000000000000000 ffffffff 00c09300 DPL=0 DS [-WA] DS =0000 0000000000000000 00000000 00000000 FS =0000 00007fc3b1a9c700 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=00007fc4ef1980b0 CR3=0000000009a1e000 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=3a5d3932325b646873732032313a3230 XMM04=6456774875434142334f726f59427469 XMM05=485320415352203a3268737320383332 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=dffffc0000000000 RBX=ffff8880147ef5e8 RCX=0000000000000001 RDX=1ffff110028fdebe RSI=ffff8880147efb08 RDI=ffff8880147ef5f0 RBP=ffff8880147efb08 RSP=ffff8880147ef540 R8 =ffffffff86141e7a R9 =ffff8880147ef628 R10=0000000000038001 R11=00000000000229c7 R12=0000000000000008 R13=ffff8880147ef630 R14=ffff8880147efb10 R15=ffff8880147ef5e8 RIP=ffffffff81130445 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 =0018 0000000000000000 ffffffff 00c09300 DPL=0 DS [-WA] DS =0000 0000000000000000 00000000 00000000 FS =0000 00007fc4eebe0900 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=00007fffa8be9000 CR3=000000000caea000 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=635f6e6f69737365733a4d41503d706f XMM01=6f6c5f6d61702c78756e696c65735f6d XMM02=61702c74696d7265705f6d61702c7469 XMM03=655f6d61702c7374696d696c5f6d6170 XMM04=3d6c616e696d72657420322e322e302e XMM05=3d656d616e74736f682022646873732f XMM06=746f6f72223d746363612078756e696c XMM07=6e655f6d61702c7374696d696c5f6d61 XMM08=652075253d64692073253d706f000000 XMM09=00000000000000000000000000000000 XMM10=00000000000000000000000000000000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000