syzkaller login: [ 28.866284] BUG: Bad rss-counter state mm:00000000c7c40553 type:MM_FILEPAGES val:33 [ 28.867524] BUG: Bad rss-counter state mm:00000000c7c40553 type:MM_ANONPAGES val:22 [ 28.906940] ================================================================== [ 28.908305] BUG: KASAN: slab-use-after-free in vma_interval_tree_remove+0xc75/0xec0 [ 28.909773] Read of size 8 at addr ffff88800de5b880 by task sshd/220 [ 28.910855] [ 28.911173] CPU: 1 PID: 220 Comm: sshd Not tainted 6.4.0-rc7-next-20230620 #1 [ 28.912372] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS 1.12.0-1 04/01/2014 [ 28.913887] Call Trace: [ 28.914334] [ 28.914682] dump_stack_lvl+0x91/0xf0 [ 28.915285] print_report+0xcc/0x620 [ 28.915882] ? __virt_addr_valid+0x102/0x340 [ 28.916570] ? vma_interval_tree_remove+0xc75/0xec0 [ 28.917340] ? vma_interval_tree_remove+0xc75/0xec0 [ 28.918128] kasan_report+0xbe/0xf0 [ 28.918711] ? vma_interval_tree_remove+0xc75/0xec0 [ 28.919474] vma_interval_tree_remove+0xc75/0xec0 [ 28.920223] vma_prepare+0xc54/0x11a0 [ 28.920800] __split_vma+0x5af/0x950 [ 28.921373] ? __pfx___split_vma+0x10/0x10 [ 28.922029] ? find_held_lock+0x2c/0x110 [ 28.922673] do_vmi_align_munmap+0x2ba/0x11f0 [ 28.923379] ? lock_is_held_type+0x9f/0x120 [ 28.924035] ? __pfx_do_vmi_align_munmap+0x10/0x10 [ 28.924784] ? mtree_range_walk+0x632/0x900 [ 28.925469] ? mas_walk+0x5c7/0x7c0 [ 28.926058] do_vmi_munmap+0x1f1/0x2b0 [ 28.926664] mmap_region+0x1f9/0x2660 [ 28.927253] ? vm_mmap_pgoff+0x15c/0x3a0 [ 28.927877] ? __pfx_arch_get_unmapped_area_topdown+0x10/0x10 [ 28.928762] ? __pfx_lock_acquire+0x10/0x10 [ 28.929479] ? __pfx_mmap_region+0x10/0x10 [ 28.930234] ? security_mmap_addr+0x7d/0xa0 [ 28.930955] ? get_unmapped_area+0x1f5/0x3f0 [ 28.931703] do_mmap+0x854/0xf00 [ 28.932295] vm_mmap_pgoff+0x1a6/0x3a0 [ 28.932967] ? __pfx_vm_mmap_pgoff+0x10/0x10 [ 28.933733] ksys_mmap_pgoff+0x3af/0x500 [ 28.934429] do_syscall_64+0x3f/0x90 [ 28.935066] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 28.935948] RIP: 0033:0x7f86e4262d82 [ 28.936569] 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 [ 28.939506] RSP: 002b:00007ffe82ce0128 EFLAGS: 00000206 ORIG_RAX: 0000000000000009 [ 28.940754] RAX: ffffffffffffffda RBX: 0000000000000812 RCX: 00007f86e4262d82 [ 28.941919] RDX: 0000000000000005 RSI: 0000000000001000 RDI: 00007f86e369c000 [ 28.943096] RBP: 00007f86e369c000 R08: 0000000000000009 R09: 0000000000001000 [ 28.944229] R10: 0000000000000812 R11: 0000000000000206 R12: 000055df86510d90 [ 28.945377] R13: 00007ffe82ce0140 R14: 00007ffe82ce0170 R15: 00007ffe82ce04d0 [ 28.946548] [ 28.946936] [ 28.947217] Allocated by task 213: [ 28.947866] kasan_save_stack+0x22/0x50 [ 28.948543] kasan_set_track+0x25/0x30 [ 28.949199] __kasan_slab_alloc+0x59/0x70 [ 28.949914] kmem_cache_alloc+0x16b/0x370 [ 28.950617] vm_area_dup+0x20/0x160 [ 28.951234] __split_vma+0x170/0x950 [ 28.951856] split_vma+0xc6/0x110 [ 28.952437] mprotect_fixup+0x8d2/0xb30 [ 28.953112] do_mprotect_pkey+0x87e/0xd40 [ 28.953828] __x64_sys_mprotect+0x78/0xc0 [ 28.954512] do_syscall_64+0x3f/0x90 [ 28.955143] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 28.956004] [ 28.956286] Freed by task 13: [ 28.956798] kasan_save_stack+0x22/0x50 [ 28.957472] kasan_set_track+0x25/0x30 [ 28.958164] kasan_save_free_info+0x2b/0x50 [ 28.958875] __kasan_slab_free+0x10a/0x190 [ 28.959598] kmem_cache_free+0x10d/0x4d0 [ 28.960279] rcu_core+0x8c8/0x2860 [ 28.960877] __do_softirq+0x1b7/0x7d4 [ 28.961522] [ 28.961816] Last potentially related work creation: [ 28.962614] kasan_save_stack+0x22/0x50 [ 28.963285] __kasan_record_aux_stack+0x8e/0xa0 [ 28.964055] __call_rcu_common.constprop.0+0x6a/0xb90 [ 28.964905] remove_vma+0x139/0x170 [ 28.965505] do_vmi_align_munmap+0xd4a/0x11f0 [ 28.966278] do_vmi_munmap+0x1f1/0x2b0 [ 28.966917] __vm_munmap+0x138/0x3a0 [ 28.967546] __x64_sys_munmap+0x59/0x80 [ 28.968190] do_syscall_64+0x3f/0x90 [ 28.968826] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 28.969698] [ 28.969980] The buggy address belongs to the object at ffff88800de5b828 [ 28.969980] which belongs to the cache vm_area_struct of size 168 [ 28.972074] The buggy address is located 88 bytes inside of [ 28.972074] freed 168-byte region [ffff88800de5b828, ffff88800de5b8d0) [ 28.974059] [ 28.974352] The buggy address belongs to the physical page: [ 28.975284] page:00000000df3e9043 refcount:1 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0xde5b [ 28.976817] memcg:ffff88800e135501 [ 28.977412] anon flags: 0x100000000000200(slab|node=0|zone=1) [ 28.978375] page_type: 0xffffffff() [ 28.978918] raw: 0100000000000200 ffff8880087a0c80 ffffea000037f980 dead000000000007 [ 28.980080] raw: 0000000000000000 0000000000110011 00000001ffffffff ffff88800e135501 [ 28.981214] page dumped because: kasan: bad access detected [ 28.982038] [ 28.982299] Memory state around the buggy address: [ 28.983022] ffff88800de5b780: fb fb fb fb fb fb fb fb fb fb fb fb fb fc fc fc [ 28.984097] ffff88800de5b800: fc fc fc fc fc fa fb fb fb fb fb fb fb fb fb fb [ 28.985150] >ffff88800de5b880: fb fb fb fb fb fb fb fb fb fb fc fc fc fc fc fc [ 28.986228] ^ [ 28.986732] ffff88800de5b900: fc fc 00 00 00 00 00 00 00 00 00 00 00 00 00 00 [ 28.987805] ffff88800de5b980: 00 00 00 00 00 00 00 fc fc fc fc fc fc fc fc 00 [ 28.988864] ================================================================== [ 28.990176] Disabling lock debugging due to kernel taint [ 30.982808] BUG: Bad rss-counter state mm:00000000fadb228d type:MM_FILEPAGES val:33 [ 30.984002] BUG: Bad rss-counter state mm:00000000fadb228d type:MM_ANONPAGES val:22 [ 31.438634] BUG: Bad rss-counter state mm:000000003fa859c1 type:MM_FILEPAGES val:33 [ 31.439802] BUG: Bad rss-counter state mm:000000003fa859c1 type:MM_ANONPAGES val:22 Warning: Permanently added '[localhost]:50573' (ECDSA) to the list of known hosts. 2023/06/20 22:07:15 fuzzer started 2023/06/20 22:07:15 dialing manager at localhost:36067 2023/06/20 22:07:15 checking machine... 2023/06/20 22:07:15 checking revisions... [ 32.071829] kmemleak: Automatic memory scanning thread ended 2023/06/20 22:07:15 testing simple program... [ 32.119874] cgroup: Unknown subsys name 'net' [ 32.165848] cgroup: Unknown subsys name 'rlimit' executing program executing program executing program VM DIAGNOSIS: 22:07:15 Registers: info registers vcpu 0 RAX=0000000000000000 RBX=dffffc0000000000 RCX=0000000000000000 RDX=ffff888019fcd1c0 RSI=ffffffff811fc554 RDI=ffffffff84535fa3 RBP=ffff888019fcdad0 RSP=ffff888016a37e50 R8 =0000000000000000 R9 =0000000000000000 R10=ffffffff85d3d357 R11=00000000000b6a61 R12=ffff888019fcda38 R13=ffff888019fcd1c0 R14=0000000000000001 R15=ffff88800c571400 RIP=ffffffff814c089b 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 00007f065e5dc900 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=00007f065eb93618 CR3=000000000fc52000 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=563412feff00545000000000000080fe 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=00007f9dd1dc3420 CR3=000000000d5ce000 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=49a55211ee37fcb0d445472546143822 XMM02=000000000011a190ec2efd57dc4c00df XMM03=00000000001216d088d5619dbff82601 XMM04=6bd6f3d7fe3d79de00000000000ae988 XMM05=19e9129bd510f2350000000000131490 XMM06=85bbf9e76dbe70b000000000001302f8 XMM07=e042d86d42eb936e0000000000121950 XMM08=88d5619dbff82601000000000011a1f0 XMM09=00000000000000000000000000000000 XMM10=00000000000000000000000000000000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000