syzkaller login: [ 38.848075] BUG: Bad rss-counter state mm:00000000d52937d2 type:MM_FILEPAGES val:33 [ 38.849321] BUG: Bad rss-counter state mm:00000000d52937d2 type:MM_ANONPAGES val:22 [ 38.885896] ================================================================== [ 38.886868] BUG: KASAN: slab-use-after-free in vma_interval_tree_remove+0xc75/0xec0 [ 38.887814] Read of size 8 at addr ffff88800e69a968 by task sshd/220 [ 38.888700] [ 38.888928] CPU: 0 PID: 220 Comm: sshd Not tainted 6.4.0-rc7-next-20230620 #1 [ 38.889797] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS 1.12.0-1 04/01/2014 [ 38.890766] Call Trace: [ 38.891089] [ 38.891378] dump_stack_lvl+0x91/0xf0 [ 38.891878] print_report+0xcc/0x620 [ 38.892366] ? __virt_addr_valid+0x102/0x340 [ 38.892935] ? vma_interval_tree_remove+0xc75/0xec0 [ 38.893563] ? vma_interval_tree_remove+0xc75/0xec0 [ 38.894186] kasan_report+0xbe/0xf0 [ 38.894667] ? vma_interval_tree_remove+0xc75/0xec0 [ 38.895295] vma_interval_tree_remove+0xc75/0xec0 [ 38.895903] vma_prepare+0xc54/0x11a0 [ 38.896392] __split_vma+0x5af/0x950 [ 38.896891] ? __pfx___split_vma+0x10/0x10 [ 38.897431] ? find_held_lock+0x2c/0x110 [ 38.897956] do_vmi_align_munmap+0x2ba/0x11f0 [ 38.898537] ? lock_is_held_type+0x9f/0x120 [ 38.899088] ? __pfx_do_vmi_align_munmap+0x10/0x10 [ 38.899710] ? mtree_range_walk+0x632/0x900 [ 38.900261] ? mas_walk+0x5c7/0x7c0 [ 38.900765] do_vmi_munmap+0x1f1/0x2b0 [ 38.901264] mmap_region+0x1f9/0x2660 [ 38.901752] ? vm_mmap_pgoff+0x15c/0x3a0 [ 38.902277] ? __pfx_arch_get_unmapped_area_topdown+0x10/0x10 [ 38.903011] ? __pfx_lock_acquire+0x10/0x10 [ 38.903549] ? __pfx_mmap_region+0x10/0x10 [ 38.904088] ? security_mmap_addr+0x7d/0xa0 [ 38.904649] ? get_unmapped_area+0x1f5/0x3f0 [ 38.905209] do_mmap+0x854/0xf00 [ 38.905656] vm_mmap_pgoff+0x1a6/0x3a0 [ 38.906153] ? __pfx_vm_mmap_pgoff+0x10/0x10 [ 38.906724] ksys_mmap_pgoff+0x3af/0x500 [ 38.907246] do_syscall_64+0x3f/0x90 [ 38.907730] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 38.908377] RIP: 0033:0x7f2dd0458d82 [ 38.908851] 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 [ 38.911038] RSP: 002b:00007fff54d3c6f8 EFLAGS: 00000206 ORIG_RAX: 0000000000000009 [ 38.911958] RAX: ffffffffffffffda RBX: 0000000000000812 RCX: 00007f2dd0458d82 [ 38.912831] RDX: 0000000000000005 RSI: 0000000000001000 RDI: 00007f2dcf892000 [ 38.913715] RBP: 00007f2dcf892000 R08: 0000000000000009 R09: 0000000000001000 [ 38.914576] R10: 0000000000000812 R11: 0000000000000206 R12: 00005647a6f45d90 [ 38.915437] R13: 00007fff54d3c710 R14: 00007fff54d3c740 R15: 00007fff54d3caa0 [ 38.916295] [ 38.916650] [ 38.916870] Allocated by task 213: [ 38.917314] kasan_save_stack+0x22/0x50 [ 38.917823] kasan_set_track+0x25/0x30 [ 38.918320] __kasan_slab_alloc+0x59/0x70 [ 38.918851] kmem_cache_alloc+0x16b/0x370 [ 38.919378] vm_area_dup+0x20/0x160 [ 38.919839] __split_vma+0x170/0x950 [ 38.920313] split_vma+0xc6/0x110 [ 38.920772] mprotect_fixup+0x8d2/0xb30 [ 38.921283] do_mprotect_pkey+0x87e/0xd40 [ 38.921818] __x64_sys_mprotect+0x78/0xc0 [ 38.922354] do_syscall_64+0x3f/0x90 [ 38.922838] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 38.923498] [ 38.923721] Freed by task 19: [ 38.924105] kasan_save_stack+0x22/0x50 [ 38.924616] kasan_set_track+0x25/0x30 [ 38.925131] kasan_save_free_info+0x2b/0x50 [ 38.925668] __kasan_slab_free+0x10a/0x190 [ 38.926211] kmem_cache_free+0x10d/0x4d0 [ 38.926730] rcu_core+0x8c8/0x2860 [ 38.927184] __do_softirq+0x1b7/0x7d4 [ 38.927668] [ 38.927889] Last potentially related work creation: [ 38.928479] kasan_save_stack+0x22/0x50 [ 38.929014] __kasan_record_aux_stack+0x8e/0xa0 [ 38.929592] __call_rcu_common.constprop.0+0x6a/0xb90 [ 38.930239] remove_vma+0x139/0x170 [ 38.930695] do_vmi_align_munmap+0xd4a/0x11f0 [ 38.931258] do_vmi_munmap+0x1f1/0x2b0 [ 38.931740] __vm_munmap+0x138/0x3a0 [ 38.932211] __x64_sys_munmap+0x59/0x80 [ 38.932727] do_syscall_64+0x3f/0x90 [ 38.933206] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 38.933856] [ 38.934070] Second to last potentially related work creation: [ 38.934768] kasan_save_stack+0x22/0x50 [ 38.935284] __kasan_record_aux_stack+0x8e/0xa0 [ 38.935863] __call_rcu_common.constprop.0+0x6a/0xb90 [ 38.936524] remove_vma+0x139/0x170 [ 38.936978] do_vmi_align_munmap+0xd4a/0x11f0 [ 38.937534] do_vmi_munmap+0x1f1/0x2b0 [ 38.938032] mmap_region+0x1f9/0x2660 [ 38.938534] do_mmap+0x854/0xf00 [ 38.938982] vm_mmap_pgoff+0x1a6/0x3a0 [ 38.939487] ksys_mmap_pgoff+0x3af/0x500 [ 38.939995] do_syscall_64+0x3f/0x90 [ 38.940484] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 38.941168] [ 38.941397] The buggy address belongs to the object at ffff88800e69a910 [ 38.941397] which belongs to the cache vm_area_struct of size 168 [ 38.942887] The buggy address is located 88 bytes inside of [ 38.942887] freed 168-byte region [ffff88800e69a910, ffff88800e69a9b8) [ 38.944325] [ 38.944551] The buggy address belongs to the physical page: [ 38.945212] page:000000004180aa15 refcount:1 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0xe69a [ 38.946298] memcg:ffff88800d914d01 [ 38.946724] anon flags: 0x100000000000200(slab|node=0|zone=1) [ 38.947429] page_type: 0xffffffff() [ 38.947885] raw: 0100000000000200 ffff8880087a0c80 0000000000000000 dead000000000001 [ 38.948816] raw: 0000000000000000 0000000000110011 00000001ffffffff ffff88800d914d01 [ 38.949764] page dumped because: kasan: bad access detected [ 38.950456] [ 38.950681] Memory state around the buggy address: [ 38.951288] ffff88800e69a800: fc fc fc fc fc 00 00 00 00 00 00 00 00 00 00 00 [ 38.952185] ffff88800e69a880: 00 00 00 00 00 00 00 00 00 00 fc fc fc fc fc fc [ 38.953110] >ffff88800e69a900: fc fc fa fb fb fb fb fb fb fb fb fb fb fb fb fb [ 38.954005] ^ [ 38.954830] ffff88800e69a980: fb fb fb fb fb fb fb fc fc fc fc fc fc fc fc 00 [ 38.955733] ffff88800e69aa00: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 [ 38.956630] ================================================================== [ 38.957765] Disabling lock debugging due to kernel taint [ 41.030271] BUG: Bad rss-counter state mm:0000000096ca0512 type:MM_FILEPAGES val:33 [ 41.031127] BUG: Bad rss-counter state mm:0000000096ca0512 type:MM_ANONPAGES val:22 [ 41.422371] BUG: Bad rss-counter state mm:000000000584be88 type:MM_FILEPAGES val:33 [ 41.423501] BUG: Bad rss-counter state mm:000000000584be88 type:MM_ANONPAGES val:22 Warning: Permanently added '[localhost]:40657' (ECDSA) to the list of known hosts. 2023/06/21 03:36:01 fuzzer started 2023/06/21 03:36:01 dialing manager at localhost:36067 2023/06/21 03:36:01 checking machine... 2023/06/21 03:36:01 checking revisions... [ 42.207696] kmemleak: Automatic memory scanning thread ended 2023/06/21 03:36:02 testing simple program... [ 42.261343] cgroup: Unknown subsys name 'net' [ 42.303954] cgroup: Unknown subsys name 'rlimit' executing program executing program executing program VM DIAGNOSIS: 03:36:01 Registers: info registers vcpu 0 RAX=ffffffff83866afe RBX=ffffffff813ad470 RCX=0000000000000001 RDX=1ffff1100d9c1359 RSI=ffffffff83866afe RDI=ffff88806ce09b38 RBP=ffff88806ce09b08 RSP=ffff88806ce09a68 R8 =0000000000000001 R9 =ffff88806ce09ab0 R10=0000000000038001 R11=000000000008da3a R12=ffff88806ce09b38 R13=0000000000000000 R14=ffff8880100a9b40 R15=ffff88800ec5be80 RIP=ffffffff84538440 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 00007f1514d45900 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=00007f15152fc618 CR3=0000000016596000 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=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=00007fdb23630630 CR3=000000000c89a000 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=11da52739f40628a4040f391ea277d9d XMM02=000000000011cb40ec2efd57dc4c00df XMM03=0000000000122d480038dc05b1a70f3e XMM04=07bd828c31fff28300000000000ae988 XMM05=c2a5dddedc29ce850000000000134420 XMM06=4fda316b135da52b0000000000133aa8 XMM07=e042d86d42eb936e0000000000123020 XMM08=0038dc05b1a70f3e000000000011cba0 XMM09=00000000000000000000000000000000 XMM10=20200000000020202020202020200000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000