syzkaller login: [ 38.800822] BUG: Bad rss-counter state mm:000000004026a28d type:MM_FILEPAGES val:33 [ 38.802040] BUG: Bad rss-counter state mm:000000004026a28d type:MM_ANONPAGES val:22 [ 38.841120] ================================================================== [ 38.842023] BUG: KASAN: slab-use-after-free in vma_interval_tree_remove+0xc75/0xec0 [ 38.842962] Read of size 8 at addr ffff88800de10ed8 by task sshd/220 [ 38.843883] [ 38.844100] CPU: 0 PID: 220 Comm: sshd Not tainted 6.4.0-rc7-next-20230620 #1 [ 38.844961] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS 1.12.0-1 04/01/2014 [ 38.846017] Call Trace: [ 38.846341] [ 38.846630] dump_stack_lvl+0x91/0xf0 [ 38.847132] print_report+0xcc/0x620 [ 38.847705] ? __virt_addr_valid+0x102/0x340 [ 38.848361] ? vma_interval_tree_remove+0xc75/0xec0 [ 38.849105] ? vma_interval_tree_remove+0xc75/0xec0 [ 38.849831] kasan_report+0xbe/0xf0 [ 38.850389] ? vma_interval_tree_remove+0xc75/0xec0 [ 38.851122] vma_interval_tree_remove+0xc75/0xec0 [ 38.851873] vma_prepare+0xc54/0x11a0 [ 38.852461] __split_vma+0x5af/0x950 [ 38.853040] ? __pfx___split_vma+0x10/0x10 [ 38.853687] ? find_held_lock+0x2c/0x110 [ 38.854330] do_vmi_align_munmap+0x2ba/0x11f0 [ 38.855025] ? lock_is_held_type+0x9f/0x120 [ 38.855690] ? __pfx_do_vmi_align_munmap+0x10/0x10 [ 38.856410] ? mtree_range_walk+0x632/0x900 [ 38.857068] ? mas_walk+0x5c7/0x7c0 [ 38.857626] do_vmi_munmap+0x1f1/0x2b0 [ 38.858213] mmap_region+0x1f9/0x2660 [ 38.858811] ? vm_mmap_pgoff+0x15c/0x3a0 [ 38.859466] ? __pfx_arch_get_unmapped_area_topdown+0x10/0x10 [ 38.860178] ? __pfx_lock_acquire+0x10/0x10 [ 38.860711] ? __pfx_mmap_region+0x10/0x10 [ 38.861234] ? security_mmap_addr+0x7d/0xa0 [ 38.861764] ? get_unmapped_area+0x1f5/0x3f0 [ 38.862313] do_mmap+0x854/0xf00 [ 38.862751] vm_mmap_pgoff+0x1a6/0x3a0 [ 38.863262] ? __pfx_vm_mmap_pgoff+0x10/0x10 [ 38.863818] ksys_mmap_pgoff+0x3af/0x500 [ 38.864320] do_syscall_64+0x3f/0x90 [ 38.864796] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 38.865442] RIP: 0033:0x7f1e6175ad82 [ 38.865897] 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 [ 38.868025] RSP: 002b:00007ffd8a209898 EFLAGS: 00000206 ORIG_RAX: 0000000000000009 [ 38.868929] RAX: ffffffffffffffda RBX: 0000000000000812 RCX: 00007f1e6175ad82 [ 38.869785] RDX: 0000000000000005 RSI: 0000000000001000 RDI: 00007f1e60b94000 [ 38.870632] RBP: 00007f1e60b94000 R08: 0000000000000009 R09: 0000000000001000 [ 38.871487] R10: 0000000000000812 R11: 0000000000000206 R12: 000055e7b7939ec0 [ 38.872342] R13: 00007ffd8a2098b0 R14: 00007ffd8a2098e0 R15: 00007ffd8a209c40 [ 38.873207] [ 38.873501] [ 38.873720] Allocated by task 213: [ 38.874150] kasan_save_stack+0x22/0x50 [ 38.874653] kasan_set_track+0x25/0x30 [ 38.875144] __kasan_slab_alloc+0x59/0x70 [ 38.875683] kmem_cache_alloc+0x16b/0x370 [ 38.876194] vm_area_dup+0x20/0x160 [ 38.876646] __split_vma+0x170/0x950 [ 38.877108] split_vma+0xc6/0x110 [ 38.877548] mprotect_fixup+0x8d2/0xb30 [ 38.878048] do_mprotect_pkey+0x87e/0xd40 [ 38.878570] __x64_sys_mprotect+0x78/0xc0 [ 38.879094] do_syscall_64+0x3f/0x90 [ 38.879579] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 38.880223] [ 38.880437] Freed by task 213: [ 38.880831] kasan_save_stack+0x22/0x50 [ 38.881333] kasan_set_track+0x25/0x30 [ 38.881822] kasan_save_free_info+0x2b/0x50 [ 38.882352] __kasan_slab_free+0x10a/0x190 [ 38.882887] kmem_cache_free+0x10d/0x4d0 [ 38.883404] rcu_core+0x8c8/0x2860 [ 38.883861] __do_softirq+0x1b7/0x7d4 [ 38.884334] [ 38.884553] Last potentially related work creation: [ 38.885141] kasan_save_stack+0x22/0x50 [ 38.885641] __kasan_record_aux_stack+0x8e/0xa0 [ 38.886217] __call_rcu_common.constprop.0+0x6a/0xb90 [ 38.886856] remove_vma+0x139/0x170 [ 38.887315] do_vmi_align_munmap+0xd4a/0x11f0 [ 38.887870] do_vmi_munmap+0x1f1/0x2b0 [ 38.888352] __vm_munmap+0x138/0x3a0 [ 38.888816] __x64_sys_munmap+0x59/0x80 [ 38.889313] do_syscall_64+0x3f/0x90 [ 38.889785] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 38.890421] [ 38.890637] The buggy address belongs to the object at ffff88800de10e80 [ 38.890637] which belongs to the cache vm_area_struct of size 168 [ 38.892120] The buggy address is located 88 bytes inside of [ 38.892120] freed 168-byte region [ffff88800de10e80, ffff88800de10f28) [ 38.893529] [ 38.893748] The buggy address belongs to the physical page: [ 38.894410] page:0000000081385437 refcount:1 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0xde10 [ 38.895502] memcg:ffff88800df8bb01 [ 38.895934] anon flags: 0x100000000000200(slab|node=0|zone=1) [ 38.896631] page_type: 0xffffffff() [ 38.897081] raw: 0100000000000200 ffff8880087a0c80 ffffea000035ed00 dead000000000007 [ 38.898008] raw: 0000000000000000 0000000000110011 00000001ffffffff ffff88800df8bb01 [ 38.898918] page dumped because: kasan: bad access detected [ 38.899598] [ 38.899813] Memory state around the buggy address: [ 38.900395] ffff88800de10d80: fc fc fc 00 00 00 00 00 00 00 00 00 00 00 00 00 [ 38.901255] ffff88800de10e00: 00 00 00 00 00 00 00 00 fc fc fc fc fc fc fc fc [ 38.902119] >ffff88800de10e80: fa fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb [ 38.902980] ^ [ 38.903722] ffff88800de10f00: fb fb fb fb fb fc fc fc fc fc fc fc fc fc fc fc [ 38.904580] ffff88800de10f80: fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc [ 38.905428] ================================================================== [ 38.906773] Disabling lock debugging due to kernel taint [ 40.819009] BUG: Bad rss-counter state mm:000000008e7ce5cb type:MM_FILEPAGES val:33 [ 40.821324] BUG: Bad rss-counter state mm:000000008e7ce5cb type:MM_ANONPAGES val:22 [ 41.351646] BUG: Bad rss-counter state mm:00000000733e33be type:MM_FILEPAGES val:33 [ 41.352864] BUG: Bad rss-counter state mm:00000000733e33be type:MM_ANONPAGES val:22 Warning: Permanently added '[localhost]:62720' (ECDSA) to the list of known hosts. 2023/06/21 03:47:31 fuzzer started 2023/06/21 03:47:32 dialing manager at localhost:36067 2023/06/21 03:47:32 checking machine... 2023/06/21 03:47:32 checking revisions... [ 42.057838] kmemleak: Automatic memory scanning thread ended 2023/06/21 03:47:32 testing simple program... [ 42.094363] cgroup: Unknown subsys name 'net' [ 42.124209] cgroup: Unknown subsys name 'rlimit' executing program executing program executing program VM DIAGNOSIS: 03:47:31 Registers: info registers vcpu 0 RAX=ffff888019c90001 RBX=0000000000000001 RCX=0000000000000001 RDX=ffff888019c8fa01 RSI=ffff888019c8fac8 RDI=ffff888019c8f740 RBP=ffff888019c8fac8 RSP=ffff888019c8f698 R8 =ffffffff8617f8ca R9 =ffff888019c8f770 R10=0000000000038001 R11=000000000002c9f1 R12=0000000000000008 R13=ffff888019c88000 R14=ffff888019c8fad0 R15=ffff888019c8f730 RIP=ffffffff811304ce RFL=00000296 [--S-AP-] 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 00007f5737c97700 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=00007f81335ebbc0 CR3=000000000db70000 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=2031333a37343a3330203132206e754a XMM01=73732878696e755f6d6170203a5d3932 XMM02=65736f6c63206e6f6973736573203a29 XMM03=755f6d6170203a5d3932325b64687373 XMM04=69662068637573206f4e203a656c6163 XMM05=3a656c696620766e65206e65706f206f XMM06=65733a6468737328766e655f6d617020 XMM07=6b7a79732031333a37343a3330203132 XMM08=3d656e696c646d632022656369767265 XMM09=00000000000000000000000000000000 XMM10=00000000000000000000000000000000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000 info registers vcpu 1 RAX=e2a35d25807fe200 RBX=1ffff1100306cf24 RCX=0000000000000000 RDX=0000000000000000 RSI=0000000000000000 RDI=ffffffff856c1fc0 RBP=0000000000000001 RSP=ffff888018367910 R8 =0000000000000001 R9 =0000000000000000 R10=ffffffff85d3d357 R11=00000000000b6a61 R12=0000000000000000 R13=0000000000000000 R14=ffffffff856c1fc0 R15=0000000000000000 RIP=ffffffff812d8edd RFL=00000286 [--S--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 00007ff2c0c79900 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=00007ffff5c0a000 CR3=000000001650a000 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=74696d7265705f6d61703d73726f746e XMM02=000000000000000000000000000000ff XMM03=5320444f4854454d5f54505952434e45 XMM04=40404040404040404040404040404040 XMM05=5a5a5a5a5a5a5a5a5a5a5a5a5a5a5a5a XMM06=20202020202020202020202020202020 XMM07=00000000000000000000000000000000 XMM08=61662029286e65706f5f746964756100 XMM09=00000000000000000000000000000000 XMM10=00000000000000000000000000000000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000