syzkaller login: [ 28.637065] BUG: Bad rss-counter state mm:0000000026b3aee0 type:MM_FILEPAGES val:33 [ 28.638433] BUG: Bad rss-counter state mm:0000000026b3aee0 type:MM_ANONPAGES val:22 [ 28.831626] ================================================================== [ 28.832556] BUG: KASAN: slab-use-after-free in vma_interval_tree_remove+0xc75/0xec0 [ 28.833503] Read of size 8 at addr ffff88800ca18058 by task sshd/220 [ 28.834377] [ 28.834597] CPU: 0 PID: 220 Comm: sshd Not tainted 6.4.0-rc7-next-20230620 #1 [ 28.835477] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS 1.12.0-1 04/01/2014 [ 28.836481] Call Trace: [ 28.836803] [ 28.837097] dump_stack_lvl+0x91/0xf0 [ 28.837598] print_report+0xcc/0x620 [ 28.838089] ? __virt_addr_valid+0x102/0x340 [ 28.838665] ? vma_interval_tree_remove+0xc75/0xec0 [ 28.839286] ? vma_interval_tree_remove+0xc75/0xec0 [ 28.839903] kasan_report+0xbe/0xf0 [ 28.840378] ? vma_interval_tree_remove+0xc75/0xec0 [ 28.841006] vma_interval_tree_remove+0xc75/0xec0 [ 28.841610] vma_prepare+0xc54/0x11a0 [ 28.842098] __split_vma+0x5af/0x950 [ 28.842586] ? __pfx___split_vma+0x10/0x10 [ 28.843124] ? find_held_lock+0x2c/0x110 [ 28.843658] do_vmi_align_munmap+0x2ba/0x11f0 [ 28.844230] ? lock_is_held_type+0x9f/0x120 [ 28.844774] ? __pfx_do_vmi_align_munmap+0x10/0x10 [ 28.845380] ? mtree_range_walk+0x632/0x900 [ 28.845939] ? mas_walk+0x5c7/0x7c0 [ 28.846431] do_vmi_munmap+0x1f1/0x2b0 [ 28.846926] mmap_region+0x1f9/0x2660 [ 28.847409] ? vm_mmap_pgoff+0x15c/0x3a0 [ 28.847928] ? __pfx_arch_get_unmapped_area_topdown+0x10/0x10 [ 28.848682] ? __pfx_lock_acquire+0x10/0x10 [ 28.849224] ? __pfx_mmap_region+0x10/0x10 [ 28.849753] ? security_mmap_addr+0x7d/0xa0 [ 28.850301] ? get_unmapped_area+0x1f5/0x3f0 [ 28.850862] do_mmap+0x854/0xf00 [ 28.851303] vm_mmap_pgoff+0x1a6/0x3a0 [ 28.851808] ? __pfx_vm_mmap_pgoff+0x10/0x10 [ 28.852373] ksys_mmap_pgoff+0x3af/0x500 [ 28.852888] do_syscall_64+0x3f/0x90 [ 28.853403] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 28.854077] RIP: 0033:0x7f819589cd82 [ 28.854564] 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 [ 28.856745] RSP: 002b:00007ffcf0d0ee08 EFLAGS: 00000206 ORIG_RAX: 0000000000000009 [ 28.857672] RAX: ffffffffffffffda RBX: 0000000000000812 RCX: 00007f819589cd82 [ 28.858534] RDX: 0000000000000005 RSI: 0000000000001000 RDI: 00007f8194cd6000 [ 28.859386] RBP: 00007f8194cd6000 R08: 0000000000000009 R09: 0000000000001000 [ 28.860241] R10: 0000000000000812 R11: 0000000000000206 R12: 000055ed0d3b1ec0 [ 28.861094] R13: 00007ffcf0d0ee20 R14: 00007ffcf0d0ee50 R15: 00007ffcf0d0f1b0 [ 28.861950] [ 28.862257] [ 28.862473] Allocated by task 213: [ 28.862905] kasan_save_stack+0x22/0x50 [ 28.863410] kasan_set_track+0x25/0x30 [ 28.863903] __kasan_slab_alloc+0x59/0x70 [ 28.864427] kmem_cache_alloc+0x16b/0x370 [ 28.864946] vm_area_dup+0x20/0x160 [ 28.865398] __split_vma+0x170/0x950 [ 28.865867] split_vma+0xc6/0x110 [ 28.866332] mprotect_fixup+0x8d2/0xb30 [ 28.866836] do_mprotect_pkey+0x87e/0xd40 [ 28.867355] __x64_sys_mprotect+0x78/0xc0 [ 28.867882] do_syscall_64+0x3f/0x90 [ 28.868356] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 28.869001] [ 28.869220] Freed by task 204: [ 28.869608] kasan_save_stack+0x22/0x50 [ 28.870119] kasan_set_track+0x25/0x30 [ 28.870625] kasan_save_free_info+0x2b/0x50 [ 28.871158] __kasan_slab_free+0x10a/0x190 [ 28.871695] kmem_cache_free+0x10d/0x4d0 [ 28.872206] rcu_core+0x8c8/0x2860 [ 28.872659] __do_softirq+0x1b7/0x7d4 [ 28.873138] [ 28.873357] Last potentially related work creation: [ 28.873939] kasan_save_stack+0x22/0x50 [ 28.874465] __kasan_record_aux_stack+0x8e/0xa0 [ 28.875042] __call_rcu_common.constprop.0+0x6a/0xb90 [ 28.875691] remove_vma+0x139/0x170 [ 28.876141] do_vmi_align_munmap+0xd4a/0x11f0 [ 28.876701] do_vmi_munmap+0x1f1/0x2b0 [ 28.877189] __vm_munmap+0x138/0x3a0 [ 28.877657] __x64_sys_munmap+0x59/0x80 [ 28.878155] do_syscall_64+0x3f/0x90 [ 28.878641] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 28.879285] [ 28.879502] The buggy address belongs to the object at ffff88800ca18000 [ 28.879502] which belongs to the cache vm_area_struct of size 168 [ 28.880978] The buggy address is located 88 bytes inside of [ 28.880978] freed 168-byte region [ffff88800ca18000, ffff88800ca180a8) [ 28.882398] [ 28.882616] The buggy address belongs to the physical page: [ 28.883276] page:000000001a99b7cd refcount:1 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0xca18 [ 28.884358] memcg:ffff88800f388501 [ 28.884787] flags: 0x100000000000200(slab|node=0|zone=1) [ 28.885444] page_type: 0xffffffff() [ 28.885896] raw: 0100000000000200 ffff8880087a0c80 ffffea0000314e40 dead000000000008 [ 28.886840] raw: 0000000000000000 0000000000110011 00000001ffffffff ffff88800f388501 [ 28.887755] page dumped because: kasan: bad access detected [ 28.888413] [ 28.888631] Memory state around the buggy address: [ 28.889211] ffff88800ca17f00: fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc [ 28.890075] ffff88800ca17f80: fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc [ 28.890939] >ffff88800ca18000: fa fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb [ 28.891791] ^ [ 28.892517] ffff88800ca18080: fb fb fb fb fb fc fc fc fc fc fc fc fc fa fb fb [ 28.893386] ffff88800ca18100: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb [ 28.894247] ================================================================== [ 28.895227] Disabling lock debugging due to kernel taint [ 31.493969] BUG: Bad rss-counter state mm:0000000032875a60 type:MM_FILEPAGES val:33 [ 31.495641] BUG: Bad rss-counter state mm:0000000032875a60 type:MM_ANONPAGES val:22 [ 31.987544] BUG: Bad rss-counter state mm:00000000755e1756 type:MM_FILEPAGES val:33 [ 31.989270] BUG: Bad rss-counter state mm:00000000755e1756 type:MM_ANONPAGES val:22 Warning: Permanently added '[localhost]:27020' (ECDSA) to the list of known hosts. 2023/06/20 22:04:25 fuzzer started 2023/06/20 22:04:26 dialing manager at localhost:36067 2023/06/20 22:04:26 checking machine... 2023/06/20 22:04:26 checking revisions... [ 32.824260] kmemleak: Automatic memory scanning thread ended 2023/06/20 22:04:26 testing simple program... [ 32.869640] cgroup: Unknown subsys name 'net' [ 32.915856] cgroup: Unknown subsys name 'rlimit' executing program executing program executing program VM DIAGNOSIS: 22:04:25 Registers: info registers vcpu 0 RAX=0000000000000000 RBX=ffff88800ed4a000 RCX=ffff88800ed4a000 RDX=00000000800c000a RSI=ffff88800ed4a000 RDI=ffff8880087b8780 RBP=ffff888010307618 RSP=ffff888010307580 R8 =00000000800c0009 R9 =0000000000000000 R10=ffffea00003b5280 R11=00000000000d000c R12=ffffea00003b5280 R13=ffff88800ed4bb80 R14=00000000800c0009 R15=ffff8880087b8780 RIP=ffffffff81809672 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 00007f420b60c900 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=00007f420aa41270 CR3=000000000d5f0000 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=756f6a2f646d65747379732f6e75722f XMM01=00676f6c7379732f6c616e72756f6a2f XMM02=756f6a2f646d65747379732f6e75722f XMM03=006c616e72756f6a2f646d6574737973 XMM04=b2ea86293ce37ae000000000000ae988 XMM05=47aa7ea033ae97250000000000132838 XMM06=7810dfdb07212acd00000000001315d8 XMM07=fb795ef6d65770560000000000121170 XMM08=4f5453444600273d67736d000d0a0920 XMM09=00000000000000000000000000000000 XMM10=00000000000000000000000000000000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000 info registers vcpu 1 RAX=0000000080000000 RBX=ffffffff8493c440 RCX=0000000000000000 RDX=1ffff1100325097c RSI=ffffffff818522ce RDI=ffff888019284be0 RBP=ffff88800d59c780 RSP=ffff88800f147a88 R8 =0000000000000005 R9 =0000000000000000 R10=0000000000000004 R11=0000000000000001 R12=0000000000000000 R13=ffff88800d59c900 R14=00000000490a801d R15=ffff888019284a30 RIP=ffffffff814c086b 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 00007f70b40a1900 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=00007fff083f9000 CR3=000000001cd1c000 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=635f6e6f69737365733a4d41503d706f XMM01=6f6c5f6d61702c78756e696c65735f6d XMM02=61702c74696d7265705f6d61702c7469 XMM03=655f6d61702c7374696d696c5f6d6170 XMM04=3d6c616e696d72657420322e322e302e XMM05=3d656d616e74736f682022646873732f XMM06=746f6f72223d746363612078756e696c XMM07=6e655f6d61702c7374696d696c5f6d61 XMM08=652075253d64692073253d706f000000 XMM09=00000000000000000000000000000000 XMM10=00000000000000000000000000000000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000