syzkaller login: [ 30.509095] BUG: Bad rss-counter state mm:00000000aebd8ba9 type:MM_FILEPAGES val:33 [ 30.509858] BUG: Bad rss-counter state mm:00000000aebd8ba9 type:MM_ANONPAGES val:22 [ 30.548585] ================================================================== [ 30.549727] BUG: KASAN: slab-use-after-free in vma_interval_tree_remove+0xc75/0xec0 [ 30.550921] Read of size 8 at addr ffff888016f8bdf0 by task sshd/221 [ 30.551639] [ 30.551847] CPU: 0 PID: 221 Comm: sshd Not tainted 6.4.0-rc7-next-20230620 #1 [ 30.552672] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS 1.12.0-1 04/01/2014 [ 30.553723] Call Trace: [ 30.554176] [ 30.554561] dump_stack_lvl+0x91/0xf0 [ 30.555226] print_report+0xcc/0x620 [ 30.555896] ? __virt_addr_valid+0x102/0x340 [ 30.556640] ? vma_interval_tree_remove+0xc75/0xec0 [ 30.557485] ? vma_interval_tree_remove+0xc75/0xec0 [ 30.558326] kasan_report+0xbe/0xf0 [ 30.558968] ? vma_interval_tree_remove+0xc75/0xec0 [ 30.559807] vma_interval_tree_remove+0xc75/0xec0 [ 30.560621] vma_prepare+0xc54/0x11a0 [ 30.561262] __split_vma+0x5af/0x950 [ 30.561908] ? __pfx___split_vma+0x10/0x10 [ 30.562649] ? find_held_lock+0x2c/0x110 [ 30.563349] do_vmi_align_munmap+0x2ba/0x11f0 [ 30.564113] ? lock_is_held_type+0x9f/0x120 [ 30.564834] ? __pfx_do_vmi_align_munmap+0x10/0x10 [ 30.565659] ? mtree_range_walk+0x632/0x900 [ 30.566422] ? mas_walk+0x5c7/0x7c0 [ 30.567026] do_vmi_munmap+0x1f1/0x2b0 [ 30.567598] mmap_region+0x1f9/0x2660 [ 30.568168] ? vm_mmap_pgoff+0x15c/0x3a0 [ 30.568771] ? __pfx_arch_get_unmapped_area_topdown+0x10/0x10 [ 30.569527] ? __pfx_lock_acquire+0x10/0x10 [ 30.570099] ? __pfx_mmap_region+0x10/0x10 [ 30.570655] ? security_mmap_addr+0x7d/0xa0 [ 30.571209] ? get_unmapped_area+0x1f5/0x3f0 [ 30.571783] do_mmap+0x854/0xf00 [ 30.572248] vm_mmap_pgoff+0x1a6/0x3a0 [ 30.572771] ? __pfx_vm_mmap_pgoff+0x10/0x10 [ 30.573362] ksys_mmap_pgoff+0x3af/0x500 [ 30.573897] do_syscall_64+0x3f/0x90 [ 30.574416] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 30.575103] RIP: 0033:0x7f08a1e5cd82 [ 30.575584] 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 [ 30.577793] RSP: 002b:00007fff54cd3cf8 EFLAGS: 00000206 ORIG_RAX: 0000000000000009 [ 30.578741] RAX: ffffffffffffffda RBX: 0000000000000812 RCX: 00007f08a1e5cd82 [ 30.579635] RDX: 0000000000000005 RSI: 0000000000001000 RDI: 00007f08a1296000 [ 30.580442] RBP: 00007f08a1296000 R08: 0000000000000009 R09: 0000000000001000 [ 30.581230] R10: 0000000000000812 R11: 0000000000000206 R12: 00005579ec5c1d90 [ 30.582031] R13: 00007fff54cd3d10 R14: 00007fff54cd3d40 R15: 00007fff54cd40a0 [ 30.582839] [ 30.583113] [ 30.583319] Allocated by task 214: [ 30.583723] kasan_save_stack+0x22/0x50 [ 30.584197] kasan_set_track+0x25/0x30 [ 30.584661] __kasan_slab_alloc+0x59/0x70 [ 30.585154] kmem_cache_alloc+0x16b/0x370 [ 30.585636] vm_area_dup+0x20/0x160 [ 30.586086] __split_vma+0x170/0x950 [ 30.586525] split_vma+0xc6/0x110 [ 30.586940] mprotect_fixup+0x8d2/0xb30 [ 30.587414] do_mprotect_pkey+0x87e/0xd40 [ 30.587901] __x64_sys_mprotect+0x78/0xc0 [ 30.588392] do_syscall_64+0x3f/0x90 [ 30.588843] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 30.589447] [ 30.589653] Freed by task 203: [ 30.590029] kasan_save_stack+0x22/0x50 [ 30.590502] kasan_set_track+0x25/0x30 [ 30.590969] kasan_save_free_info+0x2b/0x50 [ 30.591468] __kasan_slab_free+0x10a/0x190 [ 30.591970] kmem_cache_free+0x10d/0x4d0 [ 30.592449] rcu_core+0x8c8/0x2860 [ 30.592867] __do_softirq+0x1b7/0x7d4 [ 30.593318] [ 30.593523] Last potentially related work creation: [ 30.594077] kasan_save_stack+0x22/0x50 [ 30.594553] __kasan_record_aux_stack+0x8e/0xa0 [ 30.595094] __call_rcu_common.constprop.0+0x6a/0xb90 [ 30.595694] remove_vma+0x139/0x170 [ 30.596116] do_vmi_align_munmap+0xd4a/0x11f0 [ 30.596641] do_vmi_munmap+0x1f1/0x2b0 [ 30.597099] __vm_munmap+0x138/0x3a0 [ 30.597541] __x64_sys_munmap+0x59/0x80 [ 30.598028] do_syscall_64+0x3f/0x90 [ 30.598479] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 30.599081] [ 30.599290] The buggy address belongs to the object at ffff888016f8bd98 [ 30.599290] which belongs to the cache vm_area_struct of size 168 [ 30.600666] The buggy address is located 88 bytes inside of [ 30.600666] freed 168-byte region [ffff888016f8bd98, ffff888016f8be40) [ 30.601980] [ 30.602191] The buggy address belongs to the physical page: [ 30.602811] page:000000003171db2f refcount:1 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0x16f8b [ 30.603843] memcg:ffff888018a0ea01 [ 30.604244] flags: 0x100000000000200(slab|node=0|zone=1) [ 30.604846] page_type: 0xffffffff() [ 30.605268] raw: 0100000000000200 ffff8880087a0c80 dead000000000122 0000000000000000 [ 30.606140] raw: 0000000000000000 0000000000110011 00000001ffffffff ffff888018a0ea01 [ 30.606982] page dumped because: kasan: bad access detected [ 30.607600] [ 30.607802] Memory state around the buggy address: [ 30.608347] ffff888016f8bc80: fc fc fc fc fc fc 00 00 00 00 00 00 00 00 00 00 [ 30.609149] ffff888016f8bd00: 00 00 00 00 00 00 00 00 00 00 00 fc fc fc fc fc [ 30.609941] >ffff888016f8bd80: fc fc fc fa fb fb fb fb fb fb fb fb fb fb fb fb [ 30.610743] ^ [ 30.611498] ffff888016f8be00: fb fb fb fb fb fb fb fb fc fc fc fc fc fc fc fc [ 30.612293] ffff888016f8be80: fa fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb [ 30.613081] ================================================================== [ 30.614158] Disabling lock debugging due to kernel taint [ 32.637214] BUG: Bad rss-counter state mm:0000000074c96cc5 type:MM_FILEPAGES val:33 [ 32.638185] BUG: Bad rss-counter state mm:0000000074c96cc5 type:MM_ANONPAGES val:22 [ 33.120329] BUG: Bad rss-counter state mm:000000005e4414f4 type:MM_FILEPAGES val:33 [ 33.121461] BUG: Bad rss-counter state mm:000000005e4414f4 type:MM_ANONPAGES val:22 Warning: Permanently added '[localhost]:49397' (ECDSA) to the list of known hosts. 2023/06/20 21:18:43 fuzzer started 2023/06/20 21:18:44 dialing manager at localhost:36067 2023/06/20 21:18:44 checking machine... 2023/06/20 21:18:44 checking revisions... [ 33.705747] kmemleak: Automatic memory scanning thread ended 2023/06/20 21:18:44 testing simple program... [ 33.758793] cgroup: Unknown subsys name 'net' [ 33.828263] cgroup: Unknown subsys name 'rlimit' executing program executing program executing program VM DIAGNOSIS: 21:18:43 Registers: info registers vcpu 0 RAX=ffffffff81288ac5 RBX=ffffffff813ad470 RCX=ffffffff864b3801 RDX=1ffff1100d9c135e RSI=ffffffff81288ac5 RDI=ffff88806ce09b60 RBP=ffff88806ce09b30 RSP=ffff88806ce09a90 R8 =ffffffff864b381e R9 =ffff88806ce09ad8 R10=0000000000038001 R11=00000000000b547f R12=ffff88806ce09b60 R13=0000000000000000 R14=ffffffff8542a6c0 R15=ffff888019f351b0 RIP=ffffffff813ad474 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 0000000000000000 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=00007ffd10b9dde8 CR3=000000000ecb2000 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=2033343a38313a3132203032206e754a XMM01=657463656e6e6f63736944203a5d3033 XMM02=302e303120746f6f722072657375206d XMM03=203a5d3033325b646873732072656c6c XMM04=69662068637573206f4e203a656c6163 XMM05=3a656c696620766e65206e65706f206f XMM06=65733a6468737328766e655f6d617020 XMM07=6b7a79732033343a38313a3132203032 XMM08=74617020303d64696720303d64697520 XMM09=00000000000000000000000000000000 XMM10=00000000000000000000000000000000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000 info registers vcpu 1 RAX=0000000000000000 RBX=ffffffff85fa780c RCX=ffffffff8366228f RDX=000000000000000c RSI=ffffffff863b725c RDI=ffffffff85fa77fc RBP=ffffffff85fa77fc RSP=ffff88800e627358 R8 =ffffffff863b725c R9 =ffff88800e627450 R10=0000000000038001 R11=000000000008b38e R12=ffffffff85fa7808 R13=ffffffff85fa77fc R14=ffffffff85fa77fc R15=dffffc0000000000 RIP=ffffffff8112fc64 RFL=00000256 [---ZAP-] 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 00007fc4eac9d900 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=00007fc4eb254618 CR3=000000000cc98000 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=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