syzkaller login: [ 73.129499] BUG: Bad rss-counter state mm:00000000c1760162 type:MM_FILEPAGES val:33 [ 73.130737] BUG: Bad rss-counter state mm:00000000c1760162 type:MM_ANONPAGES val:22 [ 73.240420] ================================================================== [ 73.241123] BUG: KASAN: slab-use-after-free in vma_interval_tree_remove+0xc75/0xec0 [ 73.241843] Read of size 8 at addr ffff88800e1696b0 by task sshd/222 [ 73.242438] [ 73.242605] CPU: 0 PID: 222 Comm: sshd Tainted: G L 6.4.0-rc7-next-20230619 #1 [ 73.243506] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS 1.12.0-1 04/01/2014 [ 73.244264] Call Trace: [ 73.244511] [ 73.244732] dump_stack_lvl+0x91/0xf0 [ 73.245110] print_report+0xcc/0x620 [ 73.245495] ? __virt_addr_valid+0x102/0x340 [ 73.245921] ? vma_interval_tree_remove+0xc75/0xec0 [ 73.246401] ? vma_interval_tree_remove+0xc75/0xec0 [ 73.246880] kasan_report+0xbe/0xf0 [ 73.247267] ? vma_interval_tree_remove+0xc75/0xec0 [ 73.247752] vma_interval_tree_remove+0xc75/0xec0 [ 73.248237] vma_prepare+0xc54/0x11a0 [ 73.248566] __split_vma+0x5af/0x950 [ 73.248863] ? __pfx___split_vma+0x10/0x10 [ 73.249193] ? find_held_lock+0x2c/0x110 [ 73.249527] do_vmi_align_munmap+0x2ba/0x11f0 [ 73.249886] ? lock_is_held_type+0x9f/0x120 [ 73.250234] ? __pfx_do_vmi_align_munmap+0x10/0x10 [ 73.250624] ? mtree_range_walk+0x632/0x900 [ 73.250972] ? mas_walk+0x5c7/0x7c0 [ 73.251283] do_vmi_munmap+0x1f1/0x2b0 [ 73.251598] mmap_region+0x1f9/0x2660 [ 73.251906] ? vm_mmap_pgoff+0x15c/0x3a0 [ 73.252234] ? __pfx_arch_get_unmapped_area_topdown+0x10/0x10 [ 73.252693] ? __pfx_lock_acquire+0x10/0x10 [ 73.253036] ? __pfx_mmap_region+0x10/0x10 [ 73.253370] ? security_mmap_addr+0x7d/0xa0 [ 73.253718] ? get_unmapped_area+0x1f5/0x3f0 [ 73.254066] do_mmap+0x854/0xf00 [ 73.254340] vm_mmap_pgoff+0x1a6/0x3a0 [ 73.254658] ? __pfx_vm_mmap_pgoff+0x10/0x10 [ 73.255015] ksys_mmap_pgoff+0x3af/0x500 [ 73.255349] do_syscall_64+0x3f/0x90 [ 73.255652] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 73.256065] RIP: 0033:0x7f632c08bd82 [ 73.256355] 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 [ 73.257721] RSP: 002b:00007fff3a86a7e8 EFLAGS: 00000206 ORIG_RAX: 0000000000000009 [ 73.258300] RAX: ffffffffffffffda RBX: 0000000000000812 RCX: 00007f632c08bd82 [ 73.258854] RDX: 0000000000000005 RSI: 0000000000001000 RDI: 00007f632b4c5000 [ 73.259408] RBP: 00007f632b4c5000 R08: 0000000000000009 R09: 0000000000001000 [ 73.259953] R10: 0000000000000812 R11: 0000000000000206 R12: 000055821ee05b20 [ 73.260498] R13: 00007fff3a86a800 R14: 00007fff3a86a830 R15: 00007fff3a86ab90 [ 73.261046] [ 73.261234] [ 73.261371] Allocated by task 215: [ 73.261647] kasan_save_stack+0x22/0x50 [ 73.261966] kasan_set_track+0x25/0x30 [ 73.262279] __kasan_slab_alloc+0x59/0x70 [ 73.262614] kmem_cache_alloc+0x16b/0x370 [ 73.262944] vm_area_dup+0x20/0x160 [ 73.263235] __split_vma+0x170/0x950 [ 73.263542] split_vma+0xc6/0x110 [ 73.263823] mprotect_fixup+0x8d2/0xb30 [ 73.264147] do_mprotect_pkey+0x87e/0xd40 [ 73.264485] __x64_sys_mprotect+0x78/0xc0 [ 73.264815] do_syscall_64+0x3f/0x90 [ 73.265116] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 73.265517] [ 73.265652] Freed by task 19: [ 73.265898] kasan_save_stack+0x22/0x50 [ 73.266221] kasan_set_track+0x25/0x30 [ 73.266536] kasan_save_free_info+0x2b/0x50 [ 73.266879] __kasan_slab_free+0x10a/0x190 [ 73.267226] kmem_cache_free+0x10d/0x4d0 [ 73.267568] rcu_core+0x8c8/0x2860 [ 73.267854] __do_softirq+0x1b7/0x7d4 [ 73.268156] [ 73.268289] Last potentially related work creation: [ 73.268666] kasan_save_stack+0x22/0x50 [ 73.268984] __kasan_record_aux_stack+0x8e/0xa0 [ 73.269348] __call_rcu_common.constprop.0+0x6a/0xb90 [ 73.269758] remove_vma+0x139/0x170 [ 73.270053] do_vmi_align_munmap+0xd4a/0x11f0 [ 73.270414] do_vmi_munmap+0x1f1/0x2b0 [ 73.270722] __vm_munmap+0x138/0x3a0 [ 73.271029] __x64_sys_munmap+0x59/0x80 [ 73.271349] do_syscall_64+0x3f/0x90 [ 73.271653] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 73.272069] [ 73.272206] The buggy address belongs to the object at ffff88800e169658 [ 73.272206] which belongs to the cache vm_area_struct of size 168 [ 73.273175] The buggy address is located 88 bytes inside of [ 73.273175] freed 168-byte region [ffff88800e169658, ffff88800e169700) [ 73.274082] [ 73.274215] The buggy address belongs to the physical page: [ 73.274630] page:000000004a69c250 refcount:1 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0xe169 [ 73.275304] memcg:ffff888013e71c01 [ 73.275576] flags: 0x100000000000200(slab|node=0|zone=1) [ 73.275984] page_type: 0xffffffff() [ 73.276265] raw: 0100000000000200 ffff88800879fc80 dead000000000122 0000000000000000 [ 73.276841] raw: 0000000000000000 0000000000110011 00000001ffffffff ffff888013e71c01 [ 73.277437] page dumped because: kasan: bad access detected [ 73.277854] [ 73.277987] Memory state around the buggy address: [ 73.278357] ffff88800e169580: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 [ 73.278885] ffff88800e169600: 00 00 00 fc fc fc fc fc fc fc fc fa fb fb fb fb [ 73.279439] >ffff88800e169680: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb [ 73.279983] ^ [ 73.280353] ffff88800e169700: fc fc fc fc fc fc fc fc fa fb fb fb fb fb fb fb [ 73.280893] ffff88800e169780: fb fb fb fb fb fb fb fb fb fb fb fb fb fc fc fc [ 73.281435] ================================================================== [ 73.282083] Disabling lock debugging due to kernel taint [ 75.123308] BUG: Bad rss-counter state mm:00000000f5e9930c type:MM_FILEPAGES val:33 [ 75.124366] BUG: Bad rss-counter state mm:00000000f5e9930c type:MM_ANONPAGES val:22 [ 75.676812] BUG: Bad rss-counter state mm:000000000a7f3981 type:MM_FILEPAGES val:33 [ 75.677808] BUG: Bad rss-counter state mm:000000000a7f3981 type:MM_ANONPAGES val:22 Warning: Permanently added '[localhost]:6946' (ECDSA) to the list of known hosts. 2023/06/19 18:51:42 fuzzer started 2023/06/19 18:51:42 dialing manager at localhost:44161 2023/06/19 18:51:42 checking machine... 2023/06/19 18:51:42 checking revisions... [ 76.284679] kmemleak: Automatic memory scanning thread ended 2023/06/19 18:51:42 testing simple program... [ 76.332468] cgroup: Unknown subsys name 'net' [ 76.370769] cgroup: Unknown subsys name 'rlimit' executing program executing program executing program VM DIAGNOSIS: 18:50:59 Registers: info registers vcpu 0 RAX=0000000000000000 RBX=ffff88806ce09b40 RCX=0000000000000001 RDX=0000000000000000 RSI=ffffffff84506c7f RDI=ffff88806ce09b4c RBP=000000000000001d RSP=ffff88806ce09a58 R8 =0000000000000001 R9 =ffff88806ce09ab8 R10=0000000000038001 R11=000000000008abed R12=ffff88806ce09b40 R13=0000000000000000 R14=ffff888015931b40 R15=ffff888016489400 RIP=ffffffff813ad4b6 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 00007feeb8460900 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=00007feeb8a17618 CR3=000000000e262000 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=6e69676f6c5f6d61702c78756e696c65 XMM02=755f6d61702c74696d7265705f6d6170 XMM03=2c766e655f6d61702c7374696d696c5f XMM04=6d61702c766e655f6d61702c7374696d XMM05=78696e755f6d61702c74696d7265705f XMM06=6469756e69676f6c5f6d61702c78756e XMM07=672065736f6c635f6e6f69737365733a XMM08=61662029286e65706f5f746964756100 XMM09=00000000000000000000000000000000 XMM10=00000000000000000000000000000000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000 info registers vcpu 1 RAX=ffff88806cf35000 RBX=0000000000000001 RCX=ffffffff8450c50e RDX=ffffed100d9e6a01 RSI=0000000000000004 RDI=ffffffff812889a5 RBP=dffffc0000000000 RSP=ffff888008e27e70 R8 =0000000000000000 R9 =ffffed100d9e6a00 R10=ffff88806cf35003 R11=0000000000000001 R12=ffffffff85d3bed0 R13=1ffff110011c4fd3 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 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=00007f4b0c472620 CR3=000000000f4dc000 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=db5874c4f81dcab6ad4479e7b5a00606 XMM02=ec2efd57dc4c00df0000000000120f98 XMM03=5aa921f0344badc40000000000121068 XMM04=ce21ecb714c99dca00000000000ae988 XMM05=134a0ba1ea83747c0000000000139220 XMM06=db20f175d54767f00000000000138648 XMM07=e042d86d42eb936e0000000000128808 XMM08=5aa921f0344badc40000000000121068 XMM09=00000000000000000000000000000000 XMM10=20200000000020202020202020200000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000