syzkaller login: [ 37.167941] BUG: Bad rss-counter state mm:00000000654d5646 type:MM_FILEPAGES val:33 [ 37.168690] BUG: Bad rss-counter state mm:00000000654d5646 type:MM_ANONPAGES val:22 [ 37.274597] ================================================================== [ 37.275708] BUG: KASAN: slab-use-after-free in vma_interval_tree_remove+0xc75/0xec0 [ 37.276880] Read of size 8 at addr ffff88800e4ec6b0 by task sshd/219 [ 37.277938] [ 37.278231] CPU: 1 PID: 219 Comm: sshd Not tainted 6.4.0-rc7-next-20230620 #1 [ 37.279301] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS 1.12.0-1 04/01/2014 [ 37.280611] Call Trace: [ 37.281004] [ 37.281358] dump_stack_lvl+0x91/0xf0 [ 37.281984] print_report+0xcc/0x620 [ 37.282598] ? __virt_addr_valid+0x102/0x340 [ 37.283285] ? vma_interval_tree_remove+0xc75/0xec0 [ 37.284093] ? vma_interval_tree_remove+0xc75/0xec0 [ 37.284863] kasan_report+0xbe/0xf0 [ 37.285470] ? vma_interval_tree_remove+0xc75/0xec0 [ 37.286244] vma_interval_tree_remove+0xc75/0xec0 [ 37.287016] vma_prepare+0xc54/0x11a0 [ 37.287636] __split_vma+0x5af/0x950 [ 37.288236] ? __pfx___split_vma+0x10/0x10 [ 37.288789] ? find_held_lock+0x2c/0x110 [ 37.289321] do_vmi_align_munmap+0x2ba/0x11f0 [ 37.289896] ? lock_is_held_type+0x9f/0x120 [ 37.290456] ? __pfx_do_vmi_align_munmap+0x10/0x10 [ 37.291067] ? mtree_range_walk+0x632/0x900 [ 37.291630] ? mas_walk+0x5c7/0x7c0 [ 37.292122] do_vmi_munmap+0x1f1/0x2b0 [ 37.292623] mmap_region+0x1f9/0x2660 [ 37.293110] ? vm_mmap_pgoff+0x15c/0x3a0 [ 37.293639] ? __pfx_arch_get_unmapped_area_topdown+0x10/0x10 [ 37.294362] ? __pfx_lock_acquire+0x10/0x10 [ 37.294901] ? __pfx_mmap_region+0x10/0x10 [ 37.295435] ? security_mmap_addr+0x7d/0xa0 [ 37.295993] ? get_unmapped_area+0x1f5/0x3f0 [ 37.296555] do_mmap+0x854/0xf00 [ 37.297005] vm_mmap_pgoff+0x1a6/0x3a0 [ 37.297512] ? __pfx_vm_mmap_pgoff+0x10/0x10 [ 37.298075] ksys_mmap_pgoff+0x3af/0x500 [ 37.298591] do_syscall_64+0x3f/0x90 [ 37.299077] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 37.299737] RIP: 0033:0x7fcb178d9d82 [ 37.300218] 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 [ 37.302417] RSP: 002b:00007ffdd79c52a8 EFLAGS: 00000206 ORIG_RAX: 0000000000000009 [ 37.303326] RAX: ffffffffffffffda RBX: 0000000000000812 RCX: 00007fcb178d9d82 [ 37.304288] RDX: 0000000000000005 RSI: 0000000000001000 RDI: 00007fcb16d13000 [ 37.305176] RBP: 00007fcb16d13000 R08: 0000000000000009 R09: 0000000000001000 [ 37.306047] R10: 0000000000000812 R11: 0000000000000206 R12: 0000556d63b8dec0 [ 37.306913] R13: 00007ffdd79c52c0 R14: 00007ffdd79c52f0 R15: 00007ffdd79c5650 [ 37.307802] [ 37.308127] [ 37.308345] Allocated by task 212: [ 37.308792] kasan_save_stack+0x22/0x50 [ 37.309302] kasan_set_track+0x25/0x30 [ 37.309812] __kasan_slab_alloc+0x59/0x70 [ 37.310340] kmem_cache_alloc+0x16b/0x370 [ 37.310876] vm_area_dup+0x20/0x160 [ 37.311338] __split_vma+0x170/0x950 [ 37.311848] split_vma+0xc6/0x110 [ 37.312302] mprotect_fixup+0x8d2/0xb30 [ 37.312829] do_mprotect_pkey+0x87e/0xd40 [ 37.313359] __x64_sys_mprotect+0x78/0xc0 [ 37.313907] do_syscall_64+0x3f/0x90 [ 37.314410] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 37.315063] [ 37.315284] Freed by task 19: [ 37.315700] kasan_save_stack+0x22/0x50 [ 37.316232] kasan_set_track+0x25/0x30 [ 37.316757] kasan_save_free_info+0x2b/0x50 [ 37.317302] __kasan_slab_free+0x10a/0x190 [ 37.317854] kmem_cache_free+0x10d/0x4d0 [ 37.318377] rcu_core+0x8c8/0x2860 [ 37.318845] __do_softirq+0x1b7/0x7d4 [ 37.319340] [ 37.319620] Last potentially related work creation: [ 37.320416] kasan_save_stack+0x22/0x50 [ 37.320934] __kasan_record_aux_stack+0x8e/0xa0 [ 37.321542] __call_rcu_common.constprop.0+0x6a/0xb90 [ 37.322197] remove_vma+0x139/0x170 [ 37.322668] do_vmi_align_munmap+0xd4a/0x11f0 [ 37.323242] do_vmi_munmap+0x1f1/0x2b0 [ 37.323762] __vm_munmap+0x138/0x3a0 [ 37.324261] __x64_sys_munmap+0x59/0x80 [ 37.324792] do_syscall_64+0x3f/0x90 [ 37.325273] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 37.325943] [ 37.326162] Second to last potentially related work creation: [ 37.326859] kasan_save_stack+0x22/0x50 [ 37.327396] __kasan_record_aux_stack+0x8e/0xa0 [ 37.328021] __call_rcu_common.constprop.0+0x6a/0xb90 [ 37.328715] remove_vma+0x139/0x170 [ 37.329197] do_vmi_align_munmap+0xd4a/0x11f0 [ 37.329796] do_vmi_munmap+0x1f1/0x2b0 [ 37.330306] mmap_region+0x1f9/0x2660 [ 37.330819] do_mmap+0x854/0xf00 [ 37.331273] vm_mmap_pgoff+0x1a6/0x3a0 [ 37.331814] ksys_mmap_pgoff+0x7d/0x500 [ 37.332372] do_syscall_64+0x3f/0x90 [ 37.332888] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 37.333578] [ 37.333803] The buggy address belongs to the object at ffff88800e4ec658 [ 37.333803] which belongs to the cache vm_area_struct of size 168 [ 37.335391] The buggy address is located 88 bytes inside of [ 37.335391] freed 168-byte region [ffff88800e4ec658, ffff88800e4ec700) [ 37.336921] [ 37.337136] The buggy address belongs to the physical page: [ 37.337829] page:0000000084892163 refcount:1 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0xe4ec [ 37.338965] memcg:ffff88800d4e5f01 [ 37.339430] anon flags: 0x100000000000200(slab|node=0|zone=1) [ 37.340170] page_type: 0xffffffff() [ 37.340648] raw: 0100000000000200 ffff8880087a0c80 0000000000000000 dead000000000001 [ 37.341600] raw: 0000000000000000 0000000000110011 00000001ffffffff ffff88800d4e5f01 [ 37.342536] page dumped because: kasan: bad access detected [ 37.343222] [ 37.343465] Memory state around the buggy address: [ 37.344094] ffff88800e4ec580: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb [ 37.345006] ffff88800e4ec600: fb fb fb fc fc fc fc fc fc fc fc fa fb fb fb fb [ 37.345899] >ffff88800e4ec680: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb [ 37.346791] ^ [ 37.347379] ffff88800e4ec700: fc fc fc fc fc fc fc fc fa fb fb fb fb fb fb fb [ 37.348268] ffff88800e4ec780: fb fb fb fb fb fb fb fb fb fb fb fb fb fc fc fc [ 37.349123] ================================================================== [ 37.350059] Disabling lock debugging due to kernel taint [ 40.761855] BUG: Bad rss-counter state mm:0000000065d6e59a type:MM_FILEPAGES val:33 [ 40.762894] BUG: Bad rss-counter state mm:0000000065d6e59a type:MM_ANONPAGES val:22 [ 41.253302] BUG: Bad rss-counter state mm:00000000fa66acf3 type:MM_FILEPAGES val:33 [ 41.254556] BUG: Bad rss-counter state mm:00000000fa66acf3 type:MM_ANONPAGES val:22 Warning: Permanently added '[localhost]:40477' (ECDSA) to the list of known hosts. 2023/06/21 00:09:29 fuzzer started 2023/06/21 00:09:29 dialing manager at localhost:36067 2023/06/21 00:09:29 checking machine... 2023/06/21 00:09:29 checking revisions... [ 42.036943] kmemleak: Automatic memory scanning thread ended 2023/06/21 00:09:29 testing simple program... [ 42.079923] cgroup: Unknown subsys name 'net' [ 42.126972] cgroup: Unknown subsys name 'rlimit' executing program executing program executing program VM DIAGNOSIS: 00:09:29 Registers: info registers vcpu 0 RAX=ffff7fffffffffff RBX=0000000000000000 RCX=ffffffff815342db RDX=0000000000000000 RSI=0000000000000008 RDI=ffffffff85d3d350 RBP=ffffffff81839bfd RSP=ffff8880161a7850 R8 =0000000000000000 R9 =fffffbfff0ba7a6a R10=ffffffff85d3d357 R11=00000000000b6a61 R12=ffff88807ffdc000 R13=0000000000000006 R14=00000000fffffbf8 R15=0000000000000000 RIP=ffffffff8180f079 RFL=00000012 [----A--] 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 00007fd9b9642700 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=00007ffbf73e36d0 CR3=00000000147c8000 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=656e6e6f637369642064657669656365 XMM02=63736964203a31313a38323638332074 XMM03=66207463656e6e6f6373696420646576 XMM04=6456774875434142334f726f59427469 XMM05=485320415352203a3268737320383236 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=ffff88801898b400 RCX=ffffffff812e0473 RDX=0000000000000000 RSI=0000000000000004 RDI=ffff88801898b400 RBP=ffff88801898b400 RSP=ffff88801c8cf858 R8 =0000000000000000 R9 =ffffed1003131680 R10=ffff88801898b403 R11=0000000000000000 R12=0000000000000000 R13=ffff88801898b400 R14=ffffffff818be530 R15=ffff88801c8cfb98 RIP=ffffffff812e0488 RFL=00000012 [----A--] 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 00007f1c0d019900 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=00007ffe29357000 CR3=000000000e3e6000 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