syzkaller login: [ 31.296067] BUG: Bad rss-counter state mm:00000000ae3099c2 type:MM_FILEPAGES val:33 [ 31.297337] BUG: Bad rss-counter state mm:00000000ae3099c2 type:MM_ANONPAGES val:22 [ 31.346621] ================================================================== [ 31.347796] BUG: KASAN: slab-use-after-free in vma_interval_tree_remove+0xc75/0xec0 [ 31.349078] Read of size 8 at addr ffff88800f089228 by task sshd/220 [ 31.350105] [ 31.350326] CPU: 1 PID: 220 Comm: sshd Not tainted 6.4.0-rc7-next-20230619 #1 [ 31.351199] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS 1.12.0-1 04/01/2014 [ 31.352186] Call Trace: [ 31.352506] [ 31.352794] dump_stack_lvl+0x91/0xf0 [ 31.353300] print_report+0xcc/0x620 [ 31.353788] ? __virt_addr_valid+0x102/0x340 [ 31.354346] ? vma_interval_tree_remove+0xc75/0xec0 [ 31.354974] ? vma_interval_tree_remove+0xc75/0xec0 [ 31.355595] kasan_report+0xbe/0xf0 [ 31.356074] ? vma_interval_tree_remove+0xc75/0xec0 [ 31.356702] vma_interval_tree_remove+0xc75/0xec0 [ 31.357322] vma_prepare+0xc54/0x11a0 [ 31.357809] __split_vma+0x5af/0x950 [ 31.358290] ? __pfx___split_vma+0x10/0x10 [ 31.358825] ? find_held_lock+0x2c/0x110 [ 31.359353] do_vmi_align_munmap+0x2ba/0x11f0 [ 31.359920] ? lock_is_held_type+0x9f/0x120 [ 31.360462] ? __pfx_do_vmi_align_munmap+0x10/0x10 [ 31.361095] ? mtree_range_walk+0x632/0x900 [ 31.361649] ? mas_walk+0x5c7/0x7c0 [ 31.362131] do_vmi_munmap+0x1f1/0x2b0 [ 31.362622] mmap_region+0x1f9/0x2660 [ 31.363114] ? vm_mmap_pgoff+0x15c/0x3a0 [ 31.363625] ? __pfx_arch_get_unmapped_area_topdown+0x10/0x10 [ 31.364350] ? __pfx_lock_acquire+0x10/0x10 [ 31.364897] ? __pfx_mmap_region+0x10/0x10 [ 31.365432] ? security_mmap_addr+0x7d/0xa0 [ 31.365962] ? get_unmapped_area+0x1f5/0x3f0 [ 31.366519] do_mmap+0x854/0xf00 [ 31.366957] vm_mmap_pgoff+0x1a6/0x3a0 [ 31.367457] ? __pfx_vm_mmap_pgoff+0x10/0x10 [ 31.368022] ksys_mmap_pgoff+0x3af/0x500 [ 31.368537] do_syscall_64+0x3f/0x90 [ 31.369043] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 31.369700] RIP: 0033:0x7f5d5ed57d82 [ 31.370161] 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 [ 31.372307] RSP: 002b:00007ffcd68300a8 EFLAGS: 00000206 ORIG_RAX: 0000000000000009 [ 31.373232] RAX: ffffffffffffffda RBX: 0000000000000812 RCX: 00007f5d5ed57d82 [ 31.374085] RDX: 0000000000000005 RSI: 0000000000001000 RDI: 00007f5d5e191000 [ 31.374934] RBP: 00007f5d5e191000 R08: 0000000000000009 R09: 0000000000001000 [ 31.375793] R10: 0000000000000812 R11: 0000000000000206 R12: 0000563fbf254d90 [ 31.376641] R13: 00007ffcd68300c0 R14: 00007ffcd68300f0 R15: 00007ffcd6830450 [ 31.377517] [ 31.377813] [ 31.378032] Allocated by task 213: [ 31.378465] kasan_save_stack+0x22/0x50 [ 31.378974] kasan_set_track+0x25/0x30 [ 31.379559] __kasan_slab_alloc+0x59/0x70 [ 31.380093] kmem_cache_alloc+0x16b/0x370 [ 31.380612] vm_area_dup+0x20/0x160 [ 31.381080] __split_vma+0x170/0x950 [ 31.381546] split_vma+0xc6/0x110 [ 31.381992] mprotect_fixup+0x8d2/0xb30 [ 31.382501] do_mprotect_pkey+0x87e/0xd40 [ 31.383034] __x64_sys_mprotect+0x78/0xc0 [ 31.383563] do_syscall_64+0x3f/0x90 [ 31.384035] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 31.384676] [ 31.384900] Freed by task 213: [ 31.385303] kasan_save_stack+0x22/0x50 [ 31.385812] kasan_set_track+0x25/0x30 [ 31.386315] kasan_save_free_info+0x2b/0x50 [ 31.386854] __kasan_slab_free+0x10a/0x190 [ 31.387389] kmem_cache_free+0x10d/0x4d0 [ 31.387900] rcu_core+0x8c8/0x2860 [ 31.388353] __do_softirq+0x1b7/0x7d4 [ 31.388831] [ 31.389071] Last potentially related work creation: [ 31.389657] kasan_save_stack+0x22/0x50 [ 31.390165] __kasan_record_aux_stack+0x8e/0xa0 [ 31.390748] __call_rcu_common.constprop.0+0x6a/0xb90 [ 31.391393] remove_vma+0x139/0x170 [ 31.391852] do_vmi_align_munmap+0xd4a/0x11f0 [ 31.392416] do_vmi_munmap+0x1f1/0x2b0 [ 31.392913] __vm_munmap+0x138/0x3a0 [ 31.393387] __x64_sys_munmap+0x59/0x80 [ 31.393891] do_syscall_64+0x3f/0x90 [ 31.394369] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 31.395017] [ 31.395236] The buggy address belongs to the object at ffff88800f0891d0 [ 31.395236] which belongs to the cache vm_area_struct of size 168 [ 31.396719] The buggy address is located 88 bytes inside of [ 31.396719] freed 168-byte region [ffff88800f0891d0, ffff88800f089278) [ 31.398155] [ 31.398371] The buggy address belongs to the physical page: [ 31.399043] page:00000000bd45bc19 refcount:1 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0xf089 [ 31.400153] memcg:ffff88800ee62e01 [ 31.400583] flags: 0x100000000000200(slab|node=0|zone=1) [ 31.401253] page_type: 0xffffffff() [ 31.401713] raw: 0100000000000200 ffff88800879fc80 dead000000000122 0000000000000000 [ 31.402639] raw: 0000000000000000 0000000000110011 00000001ffffffff ffff88800ee62e01 [ 31.403560] page dumped because: kasan: bad access detected [ 31.404222] [ 31.404437] Memory state around the buggy address: [ 31.405034] ffff88800f089100: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 [ 31.405896] ffff88800f089180: 00 00 fc fc fc fc fc fc fc fc fa fb fb fb fb fb [ 31.406763] >ffff88800f089200: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fc [ 31.407622] ^ [ 31.408184] ffff88800f089280: fc fc fc fc fc fc fc fa fb fb fb fb fb fb fb fb [ 31.409063] ffff88800f089300: fb fb fb fb fb fb fb fb fb fb fb fb fc fc fc fc [ 31.409923] ================================================================== [ 31.410853] Disabling lock debugging due to kernel taint [ 33.605761] BUG: Bad rss-counter state mm:00000000e21dbb0e type:MM_FILEPAGES val:33 [ 33.606736] BUG: Bad rss-counter state mm:00000000e21dbb0e type:MM_ANONPAGES val:22 [ 34.110316] BUG: Bad rss-counter state mm:0000000081104b76 type:MM_FILEPAGES val:33 [ 34.111501] BUG: Bad rss-counter state mm:0000000081104b76 type:MM_ANONPAGES val:22 Warning: Permanently added '[localhost]:46903' (ECDSA) to the list of known hosts. 2023/06/19 22:48:33 fuzzer started 2023/06/19 22:48:33 dialing manager at localhost:44161 2023/06/19 22:48:33 checking machine... 2023/06/19 22:48:33 checking revisions... [ 34.808081] kmemleak: Automatic memory scanning thread ended 2023/06/19 22:48:33 testing simple program... [ 34.855285] cgroup: Unknown subsys name 'net' [ 34.908316] cgroup: Unknown subsys name 'rlimit' executing program executing program executing program VM DIAGNOSIS: 22:48:32 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=00007f15f690e000 CR3=000000000caf0000 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=b70d804aa1e92ab5b44faf6f72d66852 XMM02=2c67c8bc2e329bc3000000000011d4b0 XMM03=fb795ef6d657705600000000001241b8 XMM04=6f4eea4fb2a553b800000000000ae988 XMM05=e4cb8bb95a7664b60000000000133d48 XMM06=a435b1888634a5a10000000000132bb0 XMM07=e042d86d42eb936e0000000000124438 XMM08=d2eea1b05bb14163000000000011d510 XMM09=00000000000000000000000000000000 XMM10=20200000000020202020202020200000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000 info registers vcpu 1 RAX=dffffc0000000000 RBX=ffff888008e57978 RCX=ffffffff86137501 RDX=1ffff110011caf3a RSI=0000000000000000 RDI=ffff888008e57978 RBP=ffff888008e579d0 RSP=ffff888008e57960 R8 =ffffffff86137542 R9 =ffff888008e579b8 R10=0000000000038001 R11=0000000000020d8a R12=ffff888008e57a40 R13=0000000000000000 R14=ffff888008e2d1c0 R15=ffff88800c594410 RIP=ffffffff8113038e 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 0000000000000000 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=00007ffc3650f000 CR3=000000000ee00000 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