syzkaller login: [ 38.724288] BUG: Bad rss-counter state mm:00000000548d8566 type:MM_FILEPAGES val:33 [ 38.725807] BUG: Bad rss-counter state mm:00000000548d8566 type:MM_ANONPAGES val:22 [ 38.891840] ================================================================== [ 38.892757] BUG: KASAN: slab-use-after-free in vma_interval_tree_remove+0xc75/0xec0 [ 38.893713] Read of size 8 at addr ffff88800efc14e0 by task sshd/220 [ 38.894487] [ 38.894706] CPU: 0 PID: 220 Comm: sshd Not tainted 6.4.0-rc7-next-20230620 #1 [ 38.895646] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS 1.12.0-1 04/01/2014 [ 38.896649] Call Trace: [ 38.896971] [ 38.897260] dump_stack_lvl+0x91/0xf0 [ 38.897757] print_report+0xcc/0x620 [ 38.898245] ? __virt_addr_valid+0x102/0x340 [ 38.898800] ? vma_interval_tree_remove+0xc75/0xec0 [ 38.899427] ? vma_interval_tree_remove+0xc75/0xec0 [ 38.900075] kasan_report+0xbe/0xf0 [ 38.900557] ? vma_interval_tree_remove+0xc75/0xec0 [ 38.901180] vma_interval_tree_remove+0xc75/0xec0 [ 38.901787] vma_prepare+0xc54/0x11a0 [ 38.902271] __split_vma+0x5af/0x950 [ 38.902741] ? __pfx___split_vma+0x10/0x10 [ 38.903274] ? find_held_lock+0x2c/0x110 [ 38.903810] do_vmi_align_munmap+0x2ba/0x11f0 [ 38.904380] ? lock_is_held_type+0x9f/0x120 [ 38.904934] ? __pfx_do_vmi_align_munmap+0x10/0x10 [ 38.905541] ? mtree_range_walk+0x632/0x900 [ 38.906102] ? mas_walk+0x5c7/0x7c0 [ 38.906584] do_vmi_munmap+0x1f1/0x2b0 [ 38.907082] mmap_region+0x1f9/0x2660 [ 38.907574] ? vm_mmap_pgoff+0x15c/0x3a0 [ 38.908105] ? __pfx_arch_get_unmapped_area_topdown+0x10/0x10 [ 38.908832] ? __pfx_lock_acquire+0x10/0x10 [ 38.909378] ? __pfx_mmap_region+0x10/0x10 [ 38.909909] ? security_mmap_addr+0x7d/0xa0 [ 38.910448] ? get_unmapped_area+0x1f5/0x3f0 [ 38.911004] do_mmap+0x854/0xf00 [ 38.911446] vm_mmap_pgoff+0x1a6/0x3a0 [ 38.911970] ? __pfx_vm_mmap_pgoff+0x10/0x10 [ 38.912532] ksys_mmap_pgoff+0x3af/0x500 [ 38.913047] do_syscall_64+0x3f/0x90 [ 38.913528] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 38.914187] RIP: 0033:0x7f5f88522d82 [ 38.914652] 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 [ 38.916813] RSP: 002b:00007ffcbd783768 EFLAGS: 00000206 ORIG_RAX: 0000000000000009 [ 38.917726] RAX: ffffffffffffffda RBX: 0000000000000812 RCX: 00007f5f88522d82 [ 38.918587] RDX: 0000000000000005 RSI: 0000000000001000 RDI: 00007f5f8795c000 [ 38.919445] RBP: 00007f5f8795c000 R08: 0000000000000009 R09: 0000000000001000 [ 38.920343] R10: 0000000000000812 R11: 0000000000000206 R12: 000055d371bddd90 [ 38.921215] R13: 00007ffcbd783780 R14: 00007ffcbd7837b0 R15: 00007ffcbd783b10 [ 38.922080] [ 38.922383] [ 38.922603] Allocated by task 213: [ 38.923036] kasan_save_stack+0x22/0x50 [ 38.923543] kasan_set_track+0x25/0x30 [ 38.924055] __kasan_slab_alloc+0x59/0x70 [ 38.924587] kmem_cache_alloc+0x16b/0x370 [ 38.925108] vm_area_dup+0x20/0x160 [ 38.925577] __split_vma+0x170/0x950 [ 38.926055] split_vma+0xc6/0x110 [ 38.926501] mprotect_fixup+0x8d2/0xb30 [ 38.927015] do_mprotect_pkey+0x87e/0xd40 [ 38.927542] __x64_sys_mprotect+0x78/0xc0 [ 38.928086] do_syscall_64+0x3f/0x90 [ 38.928566] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 38.929212] [ 38.929429] Freed by task 203: [ 38.929833] kasan_save_stack+0x22/0x50 [ 38.930334] kasan_set_track+0x25/0x30 [ 38.930844] kasan_save_free_info+0x2b/0x50 [ 38.931407] __kasan_slab_free+0x10a/0x190 [ 38.931999] kmem_cache_free+0x10d/0x4d0 [ 38.932527] rcu_core+0x8c8/0x2860 [ 38.932991] __do_softirq+0x1b7/0x7d4 [ 38.933495] [ 38.933718] Last potentially related work creation: [ 38.934341] kasan_save_stack+0x22/0x50 [ 38.934875] __kasan_record_aux_stack+0x8e/0xa0 [ 38.935478] __call_rcu_common.constprop.0+0x6a/0xb90 [ 38.936170] remove_vma+0x139/0x170 [ 38.936648] do_vmi_align_munmap+0xd4a/0x11f0 [ 38.937234] do_vmi_munmap+0x1f1/0x2b0 [ 38.937745] __vm_munmap+0x138/0x3a0 [ 38.938233] __x64_sys_munmap+0x59/0x80 [ 38.938750] do_syscall_64+0x3f/0x90 [ 38.939253] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 38.939951] [ 38.940176] The buggy address belongs to the object at ffff88800efc1488 [ 38.940176] which belongs to the cache vm_area_struct of size 168 [ 38.941752] The buggy address is located 88 bytes inside of [ 38.941752] freed 168-byte region [ffff88800efc1488, ffff88800efc1530) [ 38.943257] [ 38.943485] The buggy address belongs to the physical page: [ 38.944202] page:0000000094507d6d refcount:1 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0xefc1 [ 38.945363] memcg:ffff88800ed3a501 [ 38.945812] flags: 0x100000000000200(slab|node=0|zone=1) [ 38.946504] page_type: 0xffffffff() [ 38.946985] raw: 0100000000000200 ffff8880087a0c80 ffffea00003803c0 dead000000000006 [ 38.947988] raw: 0000000000000000 0000000000110011 00000001ffffffff ffff88800ed3a501 [ 38.948958] page dumped because: kasan: bad access detected [ 38.949658] [ 38.949882] Memory state around the buggy address: [ 38.950501] ffff88800efc1380: fc fc fc fc fa fb fb fb fb fb fb fb fb fb fb fb [ 38.951410] ffff88800efc1400: fb fb fb fb fb fb fb fb fb fc fc fc fc fc fc fc [ 38.952327] >ffff88800efc1480: fc fa fb fb fb fb fb fb fb fb fb fb fb fb fb fb [ 38.953220] ^ [ 38.954033] ffff88800efc1500: fb fb fb fb fb fb fc fc fc fc fc fc fc fc fa fb [ 38.954954] ffff88800efc1580: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb [ 38.955876] ================================================================== [ 38.956943] Disabling lock debugging due to kernel taint [ 40.923522] BUG: Bad rss-counter state mm:00000000ce330c6b type:MM_FILEPAGES val:33 [ 40.924679] BUG: Bad rss-counter state mm:00000000ce330c6b type:MM_ANONPAGES val:22 [ 41.347238] BUG: Bad rss-counter state mm:00000000704275db type:MM_FILEPAGES val:33 [ 41.348034] BUG: Bad rss-counter state mm:00000000704275db type:MM_ANONPAGES val:22 Warning: Permanently added '[localhost]:26225' (ECDSA) to the list of known hosts. 2023/06/20 22:34:21 fuzzer started 2023/06/20 22:34:21 dialing manager at localhost:36067 2023/06/20 22:34:21 checking machine... 2023/06/20 22:34:21 checking revisions... [ 42.069368] kmemleak: Automatic memory scanning thread ended 2023/06/20 22:34:21 testing simple program... [ 42.120184] cgroup: Unknown subsys name 'net' [ 42.162680] cgroup: Unknown subsys name 'rlimit' executing program executing program executing program VM DIAGNOSIS: 22:34:21 Registers: info registers vcpu 0 RAX=0000000000000000 RBX=0000000000000000 RCX=0000000000000100 RDX=ffff88800efeb680 RSI=ffffffff814c857a RDI=0000000000000005 RBP=0000000000000000 RSP=ffff88806ce09a00 R8 =0000000000000005 R9 =0000000000000000 R10=0000000000000000 R11=00000000000b6a61 R12=0000000000000000 R13=0000000000000000 R14=ffffffff85652d08 R15=ffff888016787c00 RIP=ffffffff813744b0 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 00007fe0b92f8900 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=00007fe0b98af618 CR3=0000000016ace000 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=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=00007fb23e636020 CR3=0000000013a6a000 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=000edb84d85752918d4e72fca7116b5f XMM02=ec2efd57dc4c00df000000000011b0a8 XMM03=b23cbdf6bee18513000000000011b178 XMM04=e00a0d58f4a36efa00000000000ae988 XMM05=232da4ed81f9ca650000000000132788 XMM06=4fda316b135da52b00000000001314b8 XMM07=e042d86d42eb936e0000000000121d90 XMM08=b23cbdf6bee18513000000000011b178 XMM09=00000000000000000000000000000000 XMM10=20200000000020202020202020200000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000