syzkaller login: [ 54.584923] BUG: Bad rss-counter state mm:00000000765aa562 type:MM_FILEPAGES val:33 [ 54.586596] BUG: Bad rss-counter state mm:00000000765aa562 type:MM_ANONPAGES val:22 [ 54.751430] ================================================================== [ 54.752338] BUG: KASAN: slab-use-after-free in vma_interval_tree_remove+0xc75/0xec0 [ 54.753278] Read of size 8 at addr ffff8880158ba5c8 by task sshd/219 [ 54.754047] [ 54.754275] CPU: 1 PID: 219 Comm: sshd Not tainted 6.4.0-rc7-next-20230619 #1 [ 54.755241] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS 1.12.0-1 04/01/2014 [ 54.756243] Call Trace: [ 54.756564] [ 54.756858] dump_stack_lvl+0x91/0xf0 [ 54.757351] print_report+0xcc/0x620 [ 54.757848] ? __virt_addr_valid+0x102/0x340 [ 54.758418] ? vma_interval_tree_remove+0xc75/0xec0 [ 54.759064] ? vma_interval_tree_remove+0xc75/0xec0 [ 54.759671] kasan_report+0xbe/0xf0 [ 54.760172] ? vma_interval_tree_remove+0xc75/0xec0 [ 54.760800] vma_interval_tree_remove+0xc75/0xec0 [ 54.761394] vma_prepare+0xc54/0x11a0 [ 54.761879] __split_vma+0x5af/0x950 [ 54.762360] ? __pfx___split_vma+0x10/0x10 [ 54.762901] ? find_held_lock+0x2c/0x110 [ 54.763418] do_vmi_align_munmap+0x2ba/0x11f0 [ 54.764001] ? lock_is_held_type+0x9f/0x120 [ 54.764539] ? __pfx_do_vmi_align_munmap+0x10/0x10 [ 54.765156] ? mtree_range_walk+0x632/0x900 [ 54.765715] ? mas_walk+0x5c7/0x7c0 [ 54.766190] do_vmi_munmap+0x1f1/0x2b0 [ 54.766700] mmap_region+0x1f9/0x2660 [ 54.767186] ? vm_mmap_pgoff+0x15c/0x3a0 [ 54.767708] ? __pfx_arch_get_unmapped_area_topdown+0x10/0x10 [ 54.768417] ? __pfx_lock_acquire+0x10/0x10 [ 54.768968] ? __pfx_mmap_region+0x10/0x10 [ 54.769497] ? security_mmap_addr+0x7d/0xa0 [ 54.770035] ? get_unmapped_area+0x1f5/0x3f0 [ 54.770607] do_mmap+0x854/0xf00 [ 54.771052] vm_mmap_pgoff+0x1a6/0x3a0 [ 54.771538] ? __pfx_vm_mmap_pgoff+0x10/0x10 [ 54.772104] ksys_mmap_pgoff+0x3af/0x500 [ 54.772612] do_syscall_64+0x3f/0x90 [ 54.773095] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 54.773761] RIP: 0033:0x7f48caafbd82 [ 54.774234] 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 [ 54.776352] RSP: 002b:00007fffd2ed8ff8 EFLAGS: 00000206 ORIG_RAX: 0000000000000009 [ 54.777262] RAX: ffffffffffffffda RBX: 0000000000000812 RCX: 00007f48caafbd82 [ 54.778113] RDX: 0000000000000005 RSI: 0000000000001000 RDI: 00007f48c9f35000 [ 54.778994] RBP: 00007f48c9f35000 R08: 0000000000000009 R09: 0000000000001000 [ 54.779857] R10: 0000000000000812 R11: 0000000000000206 R12: 000055fd12bc2ec0 [ 54.780701] R13: 00007fffd2ed9010 R14: 00007fffd2ed9040 R15: 00007fffd2ed93a0 [ 54.781563] [ 54.781865] [ 54.782081] Allocated by task 212: [ 54.782524] kasan_save_stack+0x22/0x50 [ 54.783051] kasan_set_track+0x25/0x30 [ 54.783538] __kasan_slab_alloc+0x59/0x70 [ 54.784066] kmem_cache_alloc+0x16b/0x370 [ 54.784579] vm_area_dup+0x20/0x160 [ 54.785045] __split_vma+0x170/0x950 [ 54.785512] split_vma+0xc6/0x110 [ 54.785961] mprotect_fixup+0x8d2/0xb30 [ 54.786466] do_mprotect_pkey+0x87e/0xd40 [ 54.786993] __x64_sys_mprotect+0x78/0xc0 [ 54.787514] do_syscall_64+0x3f/0x90 [ 54.788004] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 54.788644] [ 54.788866] Freed by task 202: [ 54.789259] kasan_save_stack+0x22/0x50 [ 54.789769] kasan_set_track+0x25/0x30 [ 54.790280] kasan_save_free_info+0x2b/0x50 [ 54.790844] __kasan_slab_free+0x10a/0x190 [ 54.791380] kmem_cache_free+0x10d/0x4d0 [ 54.791953] rcu_core+0x8c8/0x2860 [ 54.792514] __do_softirq+0x1b7/0x7d4 [ 54.793030] [ 54.793246] Last potentially related work creation: [ 54.793843] kasan_save_stack+0x22/0x50 [ 54.794354] __kasan_record_aux_stack+0x8e/0xa0 [ 54.794935] __call_rcu_common.constprop.0+0x6a/0xb90 [ 54.795573] remove_vma+0x139/0x170 [ 54.796085] do_vmi_align_munmap+0xd4a/0x11f0 [ 54.796638] do_vmi_munmap+0x1f1/0x2b0 [ 54.797128] __vm_munmap+0x138/0x3a0 [ 54.797595] __x64_sys_munmap+0x59/0x80 [ 54.798111] do_syscall_64+0x3f/0x90 [ 54.798670] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 54.799487] [ 54.799762] The buggy address belongs to the object at ffff8880158ba570 [ 54.799762] which belongs to the cache vm_area_struct of size 168 [ 54.801580] The buggy address is located 88 bytes inside of [ 54.801580] freed 168-byte region [ffff8880158ba570, ffff8880158ba618) [ 54.803334] [ 54.803610] The buggy address belongs to the physical page: [ 54.804431] page:000000000bea02a6 refcount:1 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0x158ba [ 54.805523] memcg:ffff8880180cce01 [ 54.805959] flags: 0x100000000000200(slab|node=0|zone=1) [ 54.806615] page_type: 0xffffffff() [ 54.807087] raw: 0100000000000200 ffff88800879fc80 dead000000000122 0000000000000000 [ 54.808008] raw: 0000000000000000 0000000000110011 00000001ffffffff ffff8880180cce01 [ 54.808920] page dumped because: kasan: bad access detected [ 54.809577] [ 54.809799] Memory state around the buggy address: [ 54.810404] ffff8880158ba480: fc 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 [ 54.811276] ffff8880158ba500: 00 00 00 00 00 00 fc fc fc fc fc fc fc fc fa fb [ 54.812138] >ffff8880158ba580: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb [ 54.812996] ^ [ 54.813647] ffff8880158ba600: fb fb fb fc fc fc fc fc fc fc fc fa fb fb fb fb [ 54.814517] ffff8880158ba680: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb [ 54.815385] ================================================================== [ 54.816319] Disabling lock debugging due to kernel taint [ 56.729286] BUG: Bad rss-counter state mm:000000006fbc0aa2 type:MM_FILEPAGES val:33 [ 56.730849] BUG: Bad rss-counter state mm:000000006fbc0aa2 type:MM_ANONPAGES val:22 [ 57.235505] BUG: Bad rss-counter state mm:00000000d153aeab type:MM_FILEPAGES val:33 [ 57.236456] BUG: Bad rss-counter state mm:00000000d153aeab type:MM_ANONPAGES val:22 Warning: Permanently added '[localhost]:28415' (ECDSA) to the list of known hosts. 2023/06/19 22:09:07 fuzzer started 2023/06/19 22:09:07 dialing manager at localhost:44161 2023/06/19 22:09:07 checking machine... 2023/06/19 22:09:07 checking revisions... [ 57.915701] kmemleak: Automatic memory scanning thread ended 2023/06/19 22:09:07 testing simple program... [ 57.961700] cgroup: Unknown subsys name 'net' [ 58.018819] cgroup: Unknown subsys name 'rlimit' executing program executing program executing program VM DIAGNOSIS: 22:08:43 Registers: info registers vcpu 0 RAX=ffff88800d68ff48 RBX=0000000000000001 RCX=0000000000000001 RDX=ffff88800d68ff01 RSI=ffff88800d68ff18 RDI=ffff88800d68ff18 RBP=ffff88800d68f628 RSP=ffff88800d68f560 R8 =0000000000000001 R9 =ffff88800d68f610 R10=0000000000038001 R11=000000000008ab99 R12=ffff88800d68f630 R13=ffff88800d68f618 R14=ffff88800d68ff18 R15=ffff88800d68f5d0 RIP=ffffffff81131236 RFL=00000202 [-------] 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 00007f318528d900 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=00007f31846b9710 CR3=000000000d968000 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=756f6a2f646d65747379732f6e75722f XMM01=00676f6c7379732f6c616e72756f6a2f XMM02=756f6a2f646d65747379732f6e75722f XMM03=006c616e72756f6a2f646d6574737973 XMM04=788e24e4040cf7bf00000000000ae988 XMM05=079684f23ded85950000000000135288 XMM06=dfcdbad4f1609c3700000000001340e8 XMM07=fb795ef6d65770560000000000124550 XMM08=4f5453444600273d67736d000d0a0920 XMM09=00000000000000000000000000000000 XMM10=00000000000000000000000000000000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000 info registers vcpu 1 RAX=0000000000000000 RBX=0000000000000002 RCX=ffffffff864b4f38 RDX=0000000000000000 RSI=0000000000000001 RDI=0000000000000001 RBP=ffff88806cf09aa8 RSP=ffff88806cf099e0 R8 =ffffffff864b4f3c R9 =ffff88806cf09a90 R10=0000000000038001 R11=00000000000b5c92 R12=ffff88806cf09ab0 R13=ffff88806cf09a98 R14=ffff88806cf09f80 R15=ffff88806cf09a50 RIP=ffffffff81130bad 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 00007f44bec9a900 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=00007ffc3d3d7000 CR3=000000000eb0a000 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