Debian GNU/Linux 11 syzkaller ttyS0 syzkaller login: [ 30.719387] BUG: Bad rss-counter state mm:000000005d3fdcdf type:MM_FILEPAGES val:33 [ 30.720851] BUG: Bad rss-counter state mm:000000005d3fdcdf type:MM_ANONPAGES val:22 [ 30.792927] ================================================================== [ 30.794029] BUG: KASAN: slab-use-after-free in vma_interval_tree_remove+0xc75/0xec0 [ 30.795162] Read of size 8 at addr ffff88800e14c228 by task sshd/220 [ 30.796196] [ 30.796480] CPU: 0 PID: 220 Comm: sshd Not tainted 6.4.0-rc7-next-20230620 #1 [ 30.797543] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS 1.12.0-1 04/01/2014 [ 30.798767] Call Trace: [ 30.799165] [ 30.799520] dump_stack_lvl+0x91/0xf0 [ 30.800127] print_report+0xcc/0x620 [ 30.800759] ? __virt_addr_valid+0x102/0x340 [ 30.801433] ? vma_interval_tree_remove+0xc75/0xec0 [ 30.802185] ? vma_interval_tree_remove+0xc75/0xec0 [ 30.802940] kasan_report+0xbe/0xf0 [ 30.803526] ? vma_interval_tree_remove+0xc75/0xec0 [ 30.804291] vma_interval_tree_remove+0xc75/0xec0 [ 30.805040] vma_prepare+0xc54/0x11a0 [ 30.805550] __split_vma+0x5af/0x950 [ 30.806015] ? __pfx___split_vma+0x10/0x10 [ 30.806516] ? find_held_lock+0x2c/0x110 [ 30.807035] do_vmi_align_munmap+0x2ba/0x11f0 [ 30.807639] ? lock_is_held_type+0x9f/0x120 [ 30.808257] ? __pfx_do_vmi_align_munmap+0x10/0x10 [ 30.809006] ? mtree_range_walk+0x632/0x900 [ 30.809651] ? mas_walk+0x5c7/0x7c0 [ 30.810139] do_vmi_munmap+0x1f1/0x2b0 [ 30.810667] mmap_region+0x1f9/0x2660 [ 30.811205] ? vm_mmap_pgoff+0x15c/0x3a0 [ 30.811781] ? __pfx_arch_get_unmapped_area_topdown+0x10/0x10 [ 30.812463] ? __pfx_lock_acquire+0x10/0x10 [ 30.813000] ? __pfx_mmap_region+0x10/0x10 [ 30.813531] ? security_mmap_addr+0x7d/0xa0 [ 30.814053] ? get_unmapped_area+0x1f5/0x3f0 [ 30.814605] do_mmap+0x854/0xf00 [ 30.815044] vm_mmap_pgoff+0x1a6/0x3a0 [ 30.815538] ? __pfx_vm_mmap_pgoff+0x10/0x10 [ 30.816094] ksys_mmap_pgoff+0x3af/0x500 [ 30.816614] do_syscall_64+0x3f/0x90 [ 30.817089] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 30.817735] RIP: 0033:0x7f0326e84d82 [ 30.818182] 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 [ 30.820365] RSP: 002b:00007ffc14c0f9e8 EFLAGS: 00000206 ORIG_RAX: 0000000000000009 [ 30.821231] RAX: ffffffffffffffda RBX: 0000000000000812 RCX: 00007f0326e84d82 [ 30.822037] RDX: 0000000000000005 RSI: 0000000000001000 RDI: 00007f03262be000 [ 30.822839] RBP: 00007f03262be000 R08: 0000000000000009 R09: 0000000000001000 [ 30.823646] R10: 0000000000000812 R11: 0000000000000206 R12: 00005571072a6ec0 [ 30.824457] R13: 00007ffc14c0fa00 R14: 00007ffc14c0fa30 R15: 00007ffc14c0fd90 [ 30.825300] [ 30.825581] [ 30.825787] Allocated by task 213: [ 30.826198] kasan_save_stack+0x22/0x50 [ 30.826679] kasan_set_track+0x25/0x30 [ 30.827157] __kasan_slab_alloc+0x59/0x70 [ 30.827668] kmem_cache_alloc+0x16b/0x370 [ 30.828167] vm_area_dup+0x20/0x160 [ 30.828612] __split_vma+0x170/0x950 [ 30.829064] split_vma+0xc6/0x110 [ 30.829501] mprotect_fixup+0x8d2/0xb30 [ 30.830013] do_mprotect_pkey+0x87e/0xd40 [ 30.830513] __x64_sys_mprotect+0x78/0xc0 [ 30.831039] do_syscall_64+0x3f/0x90 [ 30.831529] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 30.832179] [ 30.832392] Freed by task 213: [ 30.832791] kasan_save_stack+0x22/0x50 [ 30.833289] kasan_set_track+0x25/0x30 [ 30.833789] kasan_save_free_info+0x2b/0x50 [ 30.834308] __kasan_slab_free+0x10a/0x190 [ 30.834844] kmem_cache_free+0x10d/0x4d0 [ 30.835355] rcu_core+0x8c8/0x2860 [ 30.835803] __do_softirq+0x1b7/0x7d4 [ 30.836298] [ 30.836531] Last potentially related work creation: [ 30.837121] kasan_save_stack+0x22/0x50 [ 30.837635] __kasan_record_aux_stack+0x8e/0xa0 [ 30.838205] __call_rcu_common.constprop.0+0x6a/0xb90 [ 30.838843] remove_vma+0x139/0x170 [ 30.839299] do_vmi_align_munmap+0xd4a/0x11f0 [ 30.839852] do_vmi_munmap+0x1f1/0x2b0 [ 30.840332] __vm_munmap+0x138/0x3a0 [ 30.840830] __x64_sys_munmap+0x59/0x80 [ 30.841327] do_syscall_64+0x3f/0x90 [ 30.841809] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 30.842447] [ 30.842658] Second to last potentially related work creation: [ 30.843342] kasan_save_stack+0x22/0x50 [ 30.843851] __kasan_record_aux_stack+0x8e/0xa0 [ 30.844422] __call_rcu_common.constprop.0+0x6a/0xb90 [ 30.845096] remove_vma+0x139/0x170 [ 30.845549] do_vmi_align_munmap+0xd4a/0x11f0 [ 30.846098] do_vmi_munmap+0x1f1/0x2b0 [ 30.846589] mmap_region+0x1f9/0x2660 [ 30.847058] do_mmap+0x854/0xf00 [ 30.847489] vm_mmap_pgoff+0x1a6/0x3a0 [ 30.847965] ksys_mmap_pgoff+0x3af/0x500 [ 30.848484] do_syscall_64+0x3f/0x90 [ 30.848957] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 30.849592] [ 30.849800] The buggy address belongs to the object at ffff88800e14c1d0 [ 30.849800] which belongs to the cache vm_area_struct of size 168 [ 30.851243] The buggy address is located 88 bytes inside of [ 30.851243] freed 168-byte region [ffff88800e14c1d0, ffff88800e14c278) [ 30.852646] [ 30.852866] The buggy address belongs to the physical page: [ 30.853507] page:000000002e9c3e6f refcount:1 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0xe14c [ 30.854571] memcg:ffff88800df42901 [ 30.855011] anon flags: 0x100000000000200(slab|node=0|zone=1) [ 30.855690] page_type: 0xffffffff() [ 30.856146] raw: 0100000000000200 ffff8880087a0c80 0000000000000000 dead000000000001 [ 30.857080] raw: 0000000000000000 0000000000110011 00000001ffffffff ffff88800df42901 [ 30.858002] page dumped because: kasan: bad access detected [ 30.858663] [ 30.858871] Memory state around the buggy address: [ 30.859461] ffff88800e14c100: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb [ 30.860317] ffff88800e14c180: fb fb fc fc fc fc fc fc fc fc fa fb fb fb fb fb [ 30.861162] >ffff88800e14c200: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fc [ 30.862013] ^ [ 30.862578] ffff88800e14c280: fc fc fc fc fc fc fc fa fb fb fb fb fb fb fb fb [ 30.863437] ffff88800e14c300: fb fb fb fb fb fb fb fb fb fb fb fb fc fc fc fc [ 30.864292] ================================================================== [ 30.865288] Disabling lock debugging due to kernel taint [ 33.411575] BUG: Bad rss-counter state mm:000000002dff66e6 type:MM_FILEPAGES val:33 [ 33.412603] BUG: Bad rss-counter state mm:000000002dff66e6 type:MM_ANONPAGES val:22 [ 33.991474] BUG: Bad rss-counter state mm:00000000d4372f94 type:MM_FILEPAGES val:33 [ 33.992218] BUG: Bad rss-counter state mm:00000000d4372f94 type:MM_ANONPAGES val:22 Warning: Permanently added '[localhost]:22748' (ECDSA) to the list of known hosts. 2023/06/20 21:54:47 fuzzer started 2023/06/20 21:54:47 dialing manager at localhost:36067 2023/06/20 21:54:47 checking machine... 2023/06/20 21:54:47 checking revisions... [ 34.722078] kmemleak: Automatic memory scanning thread ended 2023/06/20 21:54:47 testing simple program... [ 34.763935] cgroup: Unknown subsys name 'net' [ 34.813971] cgroup: Unknown subsys name 'rlimit' executing program executing program executing program VM DIAGNOSIS: 21:54:46 Registers: info registers vcpu 0 RAX=ffff88806ce35000 RBX=0000000000000000 RCX=ffffffff8451250e RDX=ffffed100d9c6a01 RSI=0000000000000004 RDI=ffffffff81288ac5 RBP=dffffc0000000000 RSP=ffffffff85407e10 R8 =0000000000000000 R9 =ffffed100d9c6a00 R10=ffff88806ce35003 R11=ffff888008c04000 R12=ffffffff85d3d350 R13=1ffffffff0a80fc7 R14=0000000000000000 R15=0000000000000000 RIP=ffffffff8451349f 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=00007f975f0661f0 CR3=000000000cad0000 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=8ed524173d7b0ca89241ec529802519b XMM02=2c67c8bc2e329bc3000000000011b220 XMM03=fb795ef6d65770560000000000121be0 XMM04=24d5376c461f7ad800000000000ae988 XMM05=e4cb8bb95a7664b60000000000132a38 XMM06=98329d8655b74b590000000000131c10 XMM07=e042d86d42eb936e0000000000121eb8 XMM08=6a1905feb7078574000000000011b280 XMM09=00000000000000000000000000000000 XMM10=00000000000000000000000000000000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000 info registers vcpu 1 RAX=0000000080000000 RBX=0000000000000254 RCX=ffffffff8113b67f RDX=ffff888016638000 RSI=0000000000000000 RDI=0000000000000007 RBP=ffff8880183fff58 RSP=ffff8880183ffed0 R8 =0000000000000007 R9 =0000000000000000 R10=0000000000000002 R11=0000000000000000 R12=0000000000000007 R13=00007f0dd55be3ec R14=0000000000000002 R15=ffff8880197def00 RIP=ffffffff814c086b 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 =0000 0000000000000000 00000000 00000000 DS =0000 0000000000000000 00000000 00000000 FS =0000 00007f0dd4e4c900 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=00007f0dd55be3ec CR3=000000000e3a2000 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=6720646572637465733a4d41503d706f 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