syzkaller login: [ 31.295514] BUG: Bad rss-counter state mm:0000000028269d68 type:MM_FILEPAGES val:33 [ 31.296879] BUG: Bad rss-counter state mm:0000000028269d68 type:MM_ANONPAGES val:22 [ 31.334069] ================================================================== [ 31.335088] BUG: KASAN: slab-use-after-free in vma_interval_tree_remove+0xc75/0xec0 [ 31.336023] Read of size 8 at addr ffff888015c483f8 by task sshd/220 [ 31.336794] [ 31.337014] CPU: 0 PID: 220 Comm: sshd Not tainted 6.4.0-rc7-next-20230620 #1 [ 31.337879] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS 1.12.0-1 04/01/2014 [ 31.338837] Call Trace: [ 31.339179] [ 31.339463] dump_stack_lvl+0x91/0xf0 [ 31.339951] print_report+0xcc/0x620 [ 31.340442] ? __virt_addr_valid+0x102/0x340 [ 31.340990] ? vma_interval_tree_remove+0xc75/0xec0 [ 31.341613] ? vma_interval_tree_remove+0xc75/0xec0 [ 31.342226] kasan_report+0xbe/0xf0 [ 31.342701] ? vma_interval_tree_remove+0xc75/0xec0 [ 31.343337] vma_interval_tree_remove+0xc75/0xec0 [ 31.343936] vma_prepare+0xc54/0x11a0 [ 31.344414] __split_vma+0x5af/0x950 [ 31.344885] ? __pfx___split_vma+0x10/0x10 [ 31.345407] ? find_held_lock+0x2c/0x110 [ 31.345924] do_vmi_align_munmap+0x2ba/0x11f0 [ 31.346483] ? lock_is_held_type+0x9f/0x120 [ 31.347030] ? __pfx_do_vmi_align_munmap+0x10/0x10 [ 31.347636] ? mtree_range_walk+0x632/0x900 [ 31.348188] ? mas_walk+0x5c7/0x7c0 [ 31.348660] do_vmi_munmap+0x1f1/0x2b0 [ 31.349148] mmap_region+0x1f9/0x2660 [ 31.349627] ? vm_mmap_pgoff+0x15c/0x3a0 [ 31.350134] ? __pfx_arch_get_unmapped_area_topdown+0x10/0x10 [ 31.350842] ? __pfx_lock_acquire+0x10/0x10 [ 31.351388] ? __pfx_mmap_region+0x10/0x10 [ 31.351912] ? security_mmap_addr+0x7d/0xa0 [ 31.352440] ? get_unmapped_area+0x1f5/0x3f0 [ 31.352985] do_mmap+0x854/0xf00 [ 31.353423] vm_mmap_pgoff+0x1a6/0x3a0 [ 31.353916] ? __pfx_vm_mmap_pgoff+0x10/0x10 [ 31.354476] ksys_mmap_pgoff+0x3af/0x500 [ 31.354987] do_syscall_64+0x3f/0x90 [ 31.355464] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 31.356115] RIP: 0033:0x7f5a15493d82 [ 31.356573] 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 [ 31.358681] RSP: 002b:00007ffd15b5e7c8 EFLAGS: 00000206 ORIG_RAX: 0000000000000009 [ 31.359595] RAX: ffffffffffffffda RBX: 0000000000000812 RCX: 00007f5a15493d82 [ 31.360437] RDX: 0000000000000005 RSI: 0000000000001000 RDI: 00007f5a148cd000 [ 31.361388] RBP: 00007f5a148cd000 R08: 0000000000000009 R09: 0000000000001000 [ 31.362253] R10: 0000000000000812 R11: 0000000000000206 R12: 000055ebbf741b20 [ 31.363111] R13: 00007ffd15b5e7e0 R14: 00007ffd15b5e810 R15: 00007ffd15b5eb70 [ 31.363981] [ 31.364270] [ 31.364485] Allocated by task 213: [ 31.364914] kasan_save_stack+0x22/0x50 [ 31.365419] kasan_set_track+0x25/0x30 [ 31.365918] __kasan_slab_alloc+0x59/0x70 [ 31.366435] kmem_cache_alloc+0x16b/0x370 [ 31.367021] vm_area_dup+0x20/0x160 [ 31.367663] __split_vma+0x170/0x950 [ 31.368243] split_vma+0xc6/0x110 [ 31.368783] mprotect_fixup+0x8d2/0xb30 [ 31.369406] do_mprotect_pkey+0x87e/0xd40 [ 31.370047] __x64_sys_mprotect+0x78/0xc0 [ 31.370687] do_syscall_64+0x3f/0x90 [ 31.371301] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 31.372029] [ 31.372197] Freed by task 213: [ 31.372504] kasan_save_stack+0x22/0x50 [ 31.372896] kasan_set_track+0x25/0x30 [ 31.373305] kasan_save_free_info+0x2b/0x50 [ 31.373739] __kasan_slab_free+0x10a/0x190 [ 31.374173] kmem_cache_free+0x10d/0x4d0 [ 31.374575] rcu_core+0x8c8/0x2860 [ 31.374937] __do_softirq+0x1b7/0x7d4 [ 31.375335] [ 31.375508] Last potentially related work creation: [ 31.375980] kasan_save_stack+0x22/0x50 [ 31.376368] __kasan_record_aux_stack+0x8e/0xa0 [ 31.376814] __call_rcu_common.constprop.0+0x6a/0xb90 [ 31.377310] remove_vma+0x139/0x170 [ 31.377659] do_vmi_align_munmap+0xd4a/0x11f0 [ 31.378097] do_vmi_munmap+0x1f1/0x2b0 [ 31.378474] __vm_munmap+0x138/0x3a0 [ 31.378831] __x64_sys_munmap+0x59/0x80 [ 31.379224] do_syscall_64+0x3f/0x90 [ 31.379592] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 31.380091] [ 31.380255] The buggy address belongs to the object at ffff888015c483a0 [ 31.380255] which belongs to the cache vm_area_struct of size 168 [ 31.381397] The buggy address is located 88 bytes inside of [ 31.381397] freed 168-byte region [ffff888015c483a0, ffff888015c48448) [ 31.382513] [ 31.382685] The buggy address belongs to the physical page: [ 31.383226] page:0000000069fa906f refcount:1 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0x15c48 [ 31.384071] memcg:ffff88800dcc1d01 [ 31.384321] flags: 0x100000000000200(slab|node=0|zone=1) [ 31.384696] page_type: 0xffffffff() [ 31.384976] raw: 0100000000000200 ffff8880087a0c80 dead000000000122 0000000000000000 [ 31.385525] raw: 0000000000000000 0000000000110011 00000001ffffffff ffff88800dcc1d01 [ 31.386062] page dumped because: kasan: bad access detected [ 31.386480] [ 31.386595] Memory state around the buggy address: [ 31.386898] ffff888015c48280: fc fc fc fc fc fc fc 00 00 00 00 00 00 00 00 00 [ 31.387347] ffff888015c48300: 00 00 00 00 00 00 00 00 00 00 00 00 fc fc fc fc [ 31.387789] >ffff888015c48380: fc fc fc fc fa fb fb fb fb fb fb fb fb fb fb fb [ 31.388227] ^ [ 31.388661] ffff888015c48400: fb fb fb fb fb fb fb fb fb fc fc fc fc fc fc fc [ 31.389101] ffff888015c48480: fc fa fb fb fb fb fb fb fb fb fb fb fb fb fb fb [ 31.389541] ================================================================== [ 31.390232] Disabling lock debugging due to kernel taint [ 33.635804] BUG: Bad rss-counter state mm:00000000055eee10 type:MM_FILEPAGES val:33 [ 33.636936] BUG: Bad rss-counter state mm:00000000055eee10 type:MM_ANONPAGES val:22 [ 34.130473] BUG: Bad rss-counter state mm:00000000b88b122b type:MM_FILEPAGES val:33 [ 34.131556] BUG: Bad rss-counter state mm:00000000b88b122b type:MM_ANONPAGES val:22 Warning: Permanently added '[localhost]:33474' (ECDSA) to the list of known hosts. 2023/06/20 18:12:28 fuzzer started 2023/06/20 18:12:28 dialing manager at localhost:36067 2023/06/20 18:12:28 checking machine... 2023/06/20 18:12:28 checking revisions... [ 34.867069] kmemleak: Automatic memory scanning thread ended 2023/06/20 18:12:28 testing simple program... [ 34.913980] cgroup: Unknown subsys name 'net' [ 34.946438] cgroup: Unknown subsys name 'rlimit' executing program executing program executing program VM DIAGNOSIS: 18:12:27 Registers: info registers vcpu 0 RAX=0000000080000001 RBX=00000000459b812d RCX=0000000000000000 RDX=ffff888015cfd1c0 RSI=ffffffff8219d593 RDI=0000000000000006 RBP=000000000000000f RSP=ffff888015f27548 R8 =0000000000000006 R9 =000000000000000f R10=000000000000000f R11=0000000000000000 R12=dffffc0000000000 R13=ffffffff849f2d80 R14=000000000000000f R15=ffff888015872d74 RIP=ffffffff814c0880 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 00007f54cb8e3700 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=00007f511272e0b0 CR3=000000001a114000 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=2037323a32313a3831203032206e754a XMM01=73732878696e755f6d6170203a5d3932 XMM02=65736f6c63206e6f6973736573203a29 XMM03=755f6d6170203a5d3932325b64687373 XMM04=69662068637573206f4e203a656c6163 XMM05=3a656c696620766e65206e65706f206f XMM06=65733a6468737328766e655f6d617020 XMM07=6b7a79732037323a32313a3831203032 XMM08=3d656e696c646d632022656369767265 XMM09=00000000000000000000000000000000 XMM10=00000000000000000000000000000000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000 info registers vcpu 1 RAX=ffff88806cf35000 RBX=0000000000000001 RCX=ffffffff8451250e RDX=ffffed100d9e6a01 RSI=0000000000000004 RDI=ffffffff81288ac5 RBP=dffffc0000000000 RSP=ffff888008e07e70 R8 =0000000000000000 R9 =ffffed100d9e6a00 R10=ffff88806cf35003 R11=0000000000000001 R12=ffffffff85d3d350 R13=1ffff110011c0fd3 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 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=00007fbeb0374d10 CR3=000000000f59c000 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=c1e62983727a058d734460072d87a6b8 XMM02=000000000011ac58eff9b2d0a8fce9cb XMM03=000000000011ad282c67c8bc2e329bc3 XMM04=9c01e6d59dc01b3000000000000ae988 XMM05=19e9129bd510f23500000000001321f8 XMM06=676e4ea1f2f97eb90000000000131040 XMM07=e042d86d42eb936e00000000001224c0 XMM08=64b89d8bd909dccd000000000011ad28 XMM09=00000000000000000000000000000000 XMM10=00000000000000000000000000000000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000