syzkaller login: [ 30.261355] BUG: Bad rss-counter state mm:000000006088e53d type:MM_FILEPAGES val:33 [ 30.262976] BUG: Bad rss-counter state mm:000000006088e53d type:MM_ANONPAGES val:22 [ 30.436564] ================================================================== [ 30.437470] BUG: KASAN: slab-use-after-free in vma_interval_tree_remove+0xc75/0xec0 [ 30.438435] Read of size 8 at addr ffff8880144f9ed8 by task sshd/220 [ 30.439306] [ 30.439525] CPU: 0 PID: 220 Comm: sshd Not tainted 6.4.0-rc7-next-20230620 #1 [ 30.440396] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS 1.12.0-1 04/01/2014 [ 30.441393] Call Trace: [ 30.441718] [ 30.442007] dump_stack_lvl+0x91/0xf0 [ 30.442520] print_report+0xcc/0x620 [ 30.443020] ? __virt_addr_valid+0x102/0x340 [ 30.443593] ? vma_interval_tree_remove+0xc75/0xec0 [ 30.444229] ? vma_interval_tree_remove+0xc75/0xec0 [ 30.444846] kasan_report+0xbe/0xf0 [ 30.445319] ? vma_interval_tree_remove+0xc75/0xec0 [ 30.445945] vma_interval_tree_remove+0xc75/0xec0 [ 30.446580] vma_prepare+0xc54/0x11a0 [ 30.447054] __split_vma+0x5af/0x950 [ 30.447526] ? __pfx___split_vma+0x10/0x10 [ 30.448049] ? find_held_lock+0x2c/0x110 [ 30.448566] do_vmi_align_munmap+0x2ba/0x11f0 [ 30.449124] ? lock_is_held_type+0x9f/0x120 [ 30.449659] ? __pfx_do_vmi_align_munmap+0x10/0x10 [ 30.450278] ? mtree_range_walk+0x632/0x900 [ 30.450827] ? mas_walk+0x5c7/0x7c0 [ 30.451304] do_vmi_munmap+0x1f1/0x2b0 [ 30.451794] mmap_region+0x1f9/0x2660 [ 30.452276] ? vm_mmap_pgoff+0x15c/0x3a0 [ 30.452788] ? __pfx_arch_get_unmapped_area_topdown+0x10/0x10 [ 30.453498] ? __pfx_lock_acquire+0x10/0x10 [ 30.454040] ? __pfx_mmap_region+0x10/0x10 [ 30.454593] ? security_mmap_addr+0x7d/0xa0 [ 30.455131] ? get_unmapped_area+0x1f5/0x3f0 [ 30.455678] do_mmap+0x854/0xf00 [ 30.456115] vm_mmap_pgoff+0x1a6/0x3a0 [ 30.456611] ? __pfx_vm_mmap_pgoff+0x10/0x10 [ 30.457182] ksys_mmap_pgoff+0x3af/0x500 [ 30.457699] do_syscall_64+0x3f/0x90 [ 30.458197] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 30.458845] RIP: 0033:0x7f92e55b5d82 [ 30.459306] 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 [ 30.461462] RSP: 002b:00007ffd6ad457f8 EFLAGS: 00000206 ORIG_RAX: 0000000000000009 [ 30.462383] RAX: ffffffffffffffda RBX: 0000000000000812 RCX: 00007f92e55b5d82 [ 30.463222] RDX: 0000000000000005 RSI: 0000000000001000 RDI: 00007f92e49ef000 [ 30.464068] RBP: 00007f92e49ef000 R08: 0000000000000009 R09: 0000000000001000 [ 30.464915] R10: 0000000000000812 R11: 0000000000000206 R12: 000055a2db5e8f70 [ 30.465757] R13: 00007ffd6ad45810 R14: 00007ffd6ad45840 R15: 00007ffd6ad45ba0 [ 30.466625] [ 30.466920] [ 30.467135] Allocated by task 213: [ 30.467559] kasan_save_stack+0x22/0x50 [ 30.468065] kasan_set_track+0x25/0x30 [ 30.468561] __kasan_slab_alloc+0x59/0x70 [ 30.469085] kmem_cache_alloc+0x16b/0x370 [ 30.469596] vm_area_dup+0x20/0x160 [ 30.470058] __split_vma+0x170/0x950 [ 30.470529] split_vma+0xc6/0x110 [ 30.470964] mprotect_fixup+0x8d2/0xb30 [ 30.471465] do_mprotect_pkey+0x87e/0xd40 [ 30.472009] __x64_sys_mprotect+0x78/0xc0 [ 30.472534] do_syscall_64+0x3f/0x90 [ 30.473018] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 30.473663] [ 30.473877] Freed by task 213: [ 30.474294] kasan_save_stack+0x22/0x50 [ 30.474817] kasan_set_track+0x25/0x30 [ 30.475313] kasan_save_free_info+0x2b/0x50 [ 30.475860] __kasan_slab_free+0x10a/0x190 [ 30.476403] kmem_cache_free+0x10d/0x4d0 [ 30.476912] rcu_core+0x8c8/0x2860 [ 30.477368] __do_softirq+0x1b7/0x7d4 [ 30.477851] [ 30.478071] Last potentially related work creation: [ 30.478664] kasan_save_stack+0x22/0x50 [ 30.479164] __kasan_record_aux_stack+0x8e/0xa0 [ 30.479744] __call_rcu_common.constprop.0+0x6a/0xb90 [ 30.480385] remove_vma+0x139/0x170 [ 30.480834] do_vmi_align_munmap+0xd4a/0x11f0 [ 30.481386] do_vmi_munmap+0x1f1/0x2b0 [ 30.481870] __vm_munmap+0x138/0x3a0 [ 30.482353] __x64_sys_munmap+0x59/0x80 [ 30.482860] do_syscall_64+0x3f/0x90 [ 30.483342] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 30.483991] [ 30.484204] The buggy address belongs to the object at ffff8880144f9e80 [ 30.484204] which belongs to the cache vm_area_struct of size 168 [ 30.485657] The buggy address is located 88 bytes inside of [ 30.485657] freed 168-byte region [ffff8880144f9e80, ffff8880144f9f28) [ 30.487068] [ 30.487287] The buggy address belongs to the physical page: [ 30.487947] page:00000000fc8c0c27 refcount:1 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0x144f9 [ 30.489038] memcg:ffff88801474e201 [ 30.489459] flags: 0x100000000000200(slab|node=0|zone=1) [ 30.490117] page_type: 0xffffffff() [ 30.490570] raw: 0100000000000200 ffff8880087a0c80 dead000000000122 0000000000000000 [ 30.491490] raw: 0000000000000000 0000000000110011 00000001ffffffff ffff88801474e201 [ 30.492392] page dumped because: kasan: bad access detected [ 30.493048] [ 30.493264] Memory state around the buggy address: [ 30.493844] ffff8880144f9d80: fc fc fc 00 00 00 00 00 00 00 00 00 00 00 00 00 [ 30.494710] ffff8880144f9e00: 00 00 00 00 00 00 00 00 fc fc fc fc fc fc fc fc [ 30.495579] >ffff8880144f9e80: fa fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb [ 30.496423] ^ [ 30.497145] ffff8880144f9f00: fb fb fb fb fb fc fc fc fc fc fc fc fc fc fc fc [ 30.497999] ffff8880144f9f80: fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc [ 30.498850] ================================================================== [ 30.499875] Disabling lock debugging due to kernel taint [ 32.606697] BUG: Bad rss-counter state mm:0000000039f078e9 type:MM_FILEPAGES val:32 [ 32.607754] BUG: Bad rss-counter state mm:0000000039f078e9 type:MM_ANONPAGES val:22 [ 33.122045] BUG: Bad rss-counter state mm:00000000f31be911 type:MM_FILEPAGES val:33 [ 33.123239] BUG: Bad rss-counter state mm:00000000f31be911 type:MM_ANONPAGES val:22 Warning: Permanently added '[localhost]:56408' (ECDSA) to the list of known hosts. 2023/06/21 00:28:15 fuzzer started 2023/06/21 00:28:15 dialing manager at localhost:36067 2023/06/21 00:28:15 checking machine... 2023/06/21 00:28:15 checking revisions... [ 33.756685] kmemleak: Automatic memory scanning thread ended 2023/06/21 00:28:15 testing simple program... [ 33.796200] cgroup: Unknown subsys name 'net' [ 33.848596] cgroup: Unknown subsys name 'rlimit' executing program executing program executing program VM DIAGNOSIS: 00:28:14 Registers: info registers vcpu 0 RAX=ffffffff86143674 RBX=0000000000000001 RCX=ffffffff8186bb7a RDX=0000000000000000 RSI=ffffffff86143674 RDI=ffffffff85e0500c RBP=ffff88806ce09ac8 RSP=ffff88806ce099f8 R8 =ffffffff86143674 R9 =ffff88806ce09ab0 R10=0000000000038001 R11=0000000000022992 R12=ffff88806ce09ad0 R13=ffff88806ce09ab8 R14=ffff88806ce09ab1 R15=ffff88806ce09a70 RIP=ffffffff8112fcc1 RFL=00000282 [--S----] 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 00007f85668d0900 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=00007fff6771d000 CR3=0000000019202000 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=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 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=ffff888008c04400 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=00007f195f22fa30 CR3=000000000c774000 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=7df75baf3a6c2a90f9404902d686fe20 XMM02=2c67c8bc2e329bc3000000000011b6f0 XMM03=fb795ef6d65770560000000000122200 XMM04=7d04486efd4a4ca400000000000ae988 XMM05=19e9129bd510f2350000000000132348 XMM06=6833e16393e6dc5e00000000001311b0 XMM07=e042d86d42eb936e0000000000122480 XMM08=44d103f8877405b4000000000011b750 XMM09=00000000000000000000000000000000 XMM10=00000000000000000000000000000000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000