syzkaller login: [ 68.740304] BUG: Bad rss-counter state mm:00000000f876e067 type:MM_FILEPAGES val:33 [ 68.742354] BUG: Bad rss-counter state mm:00000000f876e067 type:MM_ANONPAGES val:22 [ 68.899021] ================================================================== [ 68.899932] BUG: KASAN: slab-use-after-free in vma_interval_tree_remove+0xc75/0xec0 [ 68.900892] Read of size 8 at addr ffff88800ed16798 by task sshd/219 [ 68.901653] [ 68.901875] CPU: 0 PID: 219 Comm: sshd Not tainted 6.4.0-rc7-next-20230619 #1 [ 68.902840] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS 1.12.0-1 04/01/2014 [ 68.903820] Call Trace: [ 68.904140] [ 68.904437] dump_stack_lvl+0x91/0xf0 [ 68.904928] print_report+0xcc/0x620 [ 68.905426] ? __virt_addr_valid+0x102/0x340 [ 68.905987] ? vma_interval_tree_remove+0xc75/0xec0 [ 68.906606] ? vma_interval_tree_remove+0xc75/0xec0 [ 68.907228] kasan_report+0xbe/0xf0 [ 68.907700] ? vma_interval_tree_remove+0xc75/0xec0 [ 68.908320] vma_interval_tree_remove+0xc75/0xec0 [ 68.908947] vma_prepare+0xc54/0x11a0 [ 68.909439] __split_vma+0x5af/0x950 [ 68.909915] ? __pfx___split_vma+0x10/0x10 [ 68.910455] ? find_held_lock+0x2c/0x110 [ 68.910982] do_vmi_align_munmap+0x2ba/0x11f0 [ 68.911561] ? lock_is_held_type+0x9f/0x120 [ 68.912110] ? __pfx_do_vmi_align_munmap+0x10/0x10 [ 68.912742] ? mtree_range_walk+0x632/0x900 [ 68.913306] ? mas_walk+0x5c7/0x7c0 [ 68.913786] do_vmi_munmap+0x1f1/0x2b0 [ 68.914285] mmap_region+0x1f9/0x2660 [ 68.914773] ? vm_mmap_pgoff+0x15c/0x3a0 [ 68.915289] ? __pfx_arch_get_unmapped_area_topdown+0x10/0x10 [ 68.916010] ? __pfx_lock_acquire+0x10/0x10 [ 68.916563] ? __pfx_mmap_region+0x10/0x10 [ 68.917098] ? security_mmap_addr+0x7d/0xa0 [ 68.917636] ? get_unmapped_area+0x1f5/0x3f0 [ 68.918196] do_mmap+0x854/0xf00 [ 68.918645] vm_mmap_pgoff+0x1a6/0x3a0 [ 68.919147] ? __pfx_vm_mmap_pgoff+0x10/0x10 [ 68.919722] ksys_mmap_pgoff+0x3af/0x500 [ 68.920234] do_syscall_64+0x3f/0x90 [ 68.920737] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 68.921396] RIP: 0033:0x7f82c2f9dd82 [ 68.921857] 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 [ 68.923992] RSP: 002b:00007ffd56638178 EFLAGS: 00000206 ORIG_RAX: 0000000000000009 [ 68.924923] RAX: ffffffffffffffda RBX: 0000000000000812 RCX: 00007f82c2f9dd82 [ 68.925771] RDX: 0000000000000005 RSI: 0000000000001000 RDI: 00007f82c23d7000 [ 68.926621] RBP: 00007f82c23d7000 R08: 0000000000000009 R09: 0000000000001000 [ 68.927470] R10: 0000000000000812 R11: 0000000000000206 R12: 0000559b74f56f70 [ 68.928318] R13: 00007ffd56638190 R14: 00007ffd566381c0 R15: 00007ffd56638520 [ 68.929181] [ 68.929470] [ 68.929687] Allocated by task 212: [ 68.930115] kasan_save_stack+0x22/0x50 [ 68.930615] kasan_set_track+0x25/0x30 [ 68.931103] __kasan_slab_alloc+0x59/0x70 [ 68.931629] kmem_cache_alloc+0x16b/0x370 [ 68.932146] vm_area_dup+0x20/0x160 [ 68.932628] __split_vma+0x170/0x950 [ 68.933093] split_vma+0xc6/0x110 [ 68.933540] mprotect_fixup+0x8d2/0xb30 [ 68.934044] do_mprotect_pkey+0x87e/0xd40 [ 68.934573] __x64_sys_mprotect+0x78/0xc0 [ 68.935095] do_syscall_64+0x3f/0x90 [ 68.935571] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 68.936215] [ 68.936437] Freed by task 212: [ 68.936833] kasan_save_stack+0x22/0x50 [ 68.937347] kasan_set_track+0x25/0x30 [ 68.937847] kasan_save_free_info+0x2b/0x50 [ 68.938390] __kasan_slab_free+0x10a/0x190 [ 68.938926] kmem_cache_free+0x10d/0x4d0 [ 68.939442] rcu_core+0x8c8/0x2860 [ 68.939891] __do_softirq+0x1b7/0x7d4 [ 68.940382] [ 68.940606] Last potentially related work creation: [ 68.941197] kasan_save_stack+0x22/0x50 [ 68.941709] __kasan_record_aux_stack+0x8e/0xa0 [ 68.942286] __call_rcu_common.constprop.0+0x6a/0xb90 [ 68.942934] remove_vma+0x139/0x170 [ 68.943391] do_vmi_align_munmap+0xd4a/0x11f0 [ 68.943956] do_vmi_munmap+0x1f1/0x2b0 [ 68.944456] __vm_munmap+0x138/0x3a0 [ 68.944930] __x64_sys_munmap+0x59/0x80 [ 68.945429] do_syscall_64+0x3f/0x90 [ 68.945905] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 68.946549] [ 68.946767] Second to last potentially related work creation: [ 68.947452] kasan_save_stack+0x22/0x50 [ 68.947958] __kasan_record_aux_stack+0x8e/0xa0 [ 68.948539] __call_rcu_common.constprop.0+0x6a/0xb90 [ 68.949189] remove_vma+0x139/0x170 [ 68.949642] do_vmi_align_munmap+0xd4a/0x11f0 [ 68.950205] do_vmi_munmap+0x1f1/0x2b0 [ 68.950694] mmap_region+0x1f9/0x2660 [ 68.951173] do_mmap+0x854/0xf00 [ 68.951609] vm_mmap_pgoff+0x1a6/0x3a0 [ 68.952100] ksys_mmap_pgoff+0x3af/0x500 [ 68.952622] do_syscall_64+0x3f/0x90 [ 68.953099] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 68.953760] [ 68.953983] The buggy address belongs to the object at ffff88800ed16740 [ 68.953983] which belongs to the cache vm_area_struct of size 168 [ 68.955504] The buggy address is located 88 bytes inside of [ 68.955504] freed 168-byte region [ffff88800ed16740, ffff88800ed167e8) [ 68.956919] [ 68.957138] The buggy address belongs to the physical page: [ 68.957812] page:0000000065a55a33 refcount:1 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0xed16 [ 68.958950] memcg:ffff88800ec21e01 [ 68.959385] anon flags: 0x100000000000200(slab|node=0|zone=1) [ 68.960094] page_type: 0xffffffff() [ 68.960566] raw: 0100000000000200 ffff88800879fc80 0000000000000000 dead000000000001 [ 68.961500] raw: 0000000000000000 0000000000110011 00000001ffffffff ffff88800ec21e01 [ 68.962409] page dumped because: kasan: bad access detected [ 68.963075] [ 68.963294] Memory state around the buggy address: [ 68.963880] ffff88800ed16680: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb [ 68.964740] ffff88800ed16700: fc fc fc fc fc fc fc fc fa fb fb fb fb fb fb fb [ 68.965602] >ffff88800ed16780: fb fb fb fb fb fb fb fb fb fb fb fb fb fc fc fc [ 68.966448] ^ [ 68.966947] ffff88800ed16800: fc fc fc fc fc 00 00 00 00 00 00 00 00 00 00 00 [ 68.967809] ffff88800ed16880: 00 00 00 00 00 00 00 00 00 00 fc fc fc fc fc fc [ 68.968664] ================================================================== [ 68.969642] Disabling lock debugging due to kernel taint [ 70.880285] BUG: Bad rss-counter state mm:000000007a287859 type:MM_FILEPAGES val:33 [ 70.881459] BUG: Bad rss-counter state mm:000000007a287859 type:MM_ANONPAGES val:22 [ 71.418313] BUG: Bad rss-counter state mm:00000000c7331848 type:MM_FILEPAGES val:33 [ 71.419523] BUG: Bad rss-counter state mm:00000000c7331848 type:MM_ANONPAGES val:22 Warning: Permanently added '[localhost]:35090' (ECDSA) to the list of known hosts. 2023/06/20 09:23:03 fuzzer started 2023/06/20 09:23:03 dialing manager at localhost:44161 2023/06/20 09:23:03 checking machine... 2023/06/20 09:23:03 checking revisions... [ 72.063879] kmemleak: Automatic memory scanning thread ended 2023/06/20 09:23:03 testing simple program... [ 72.113098] cgroup: Unknown subsys name 'net' [ 72.152752] cgroup: Unknown subsys name 'rlimit' executing program executing program executing program VM DIAGNOSIS: 09:22:32 Registers: info registers vcpu 0 RAX=ffff88806ce35000 RBX=0000000000000000 RCX=ffffffff8450c50e RDX=ffffed100d9c6a01 RSI=0000000000000004 RDI=ffffffff812889a5 RBP=dffffc0000000000 RSP=ffffffff85407e10 R8 =0000000000000000 R9 =ffffed100d9c6a00 R10=ffff88806ce35003 R11=ffff888008c58000 R12=ffffffff85d3bed0 R13=1ffffffff0a80fc7 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 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=00007f7456f65dc0 CR3=0000000018f32000 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=2032303a33323a3930203032206e754a XMM01=73732878696e755f6d6170203a5d3832 XMM02=65736f6c63206e6f6973736573203a29 XMM03=755f6d6170203a5d3832325b64687373 XMM04=69662068637573206f4e203a656c6163 XMM05=3a656c696620766e65206e65706f206f XMM06=65733a6468737328766e655f6d617020 XMM07=6b7a79732032303a33323a3930203032 XMM08=3d656e696c646d632022656369767265 XMM09=00000000000000000000000000000000 XMM10=00000000000000000000000000000000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000 info registers vcpu 1 RAX=0000000000000000 RBX=ffff88801ccb4e0c RCX=ffffffff844bad42 RDX=ffff88800fd7d1c0 RSI=0000000000000000 RDI=0000000000000004 RBP=ffff88801ccb461c RSP=ffff888019b8f0f0 R8 =0000000000000004 R9 =0000000000000000 R10=0000000000000003 R11=ffff88800e353c1c R12=ffff888019b8f528 R13=0000000000000003 R14=0000000000000000 R15=ffff888019b8f4b0 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 =0018 0000000000000000 ffffffff 00c09300 DPL=0 DS [-WA] DS =0000 0000000000000000 00000000 00000000 FS =0000 00007f588fb5e900 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=00007f588fb28008 CR3=0000000019552000 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