syzkaller login: [ 30.555193] BUG: Bad rss-counter state mm:00000000ca604993 type:MM_FILEPAGES val:33 [ 30.556201] BUG: Bad rss-counter state mm:00000000ca604993 type:MM_ANONPAGES val:22 [ 30.713852] ================================================================== [ 30.714758] BUG: KASAN: slab-use-after-free in vma_interval_tree_remove+0xc75/0xec0 [ 30.715704] Read of size 8 at addr ffff8880186d3c20 by task sshd/220 [ 30.716623] [ 30.716849] CPU: 1 PID: 220 Comm: sshd Not tainted 6.4.0-rc7-next-20230620 #1 [ 30.717726] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS 1.12.0-1 04/01/2014 [ 30.718713] Call Trace: [ 30.719036] [ 30.719324] dump_stack_lvl+0x91/0xf0 [ 30.719823] print_report+0xcc/0x620 [ 30.720309] ? __virt_addr_valid+0x102/0x340 [ 30.720881] ? vma_interval_tree_remove+0xc75/0xec0 [ 30.721503] ? vma_interval_tree_remove+0xc75/0xec0 [ 30.722123] kasan_report+0xbe/0xf0 [ 30.722597] ? vma_interval_tree_remove+0xc75/0xec0 [ 30.723232] vma_interval_tree_remove+0xc75/0xec0 [ 30.723850] vma_prepare+0xc54/0x11a0 [ 30.724377] __split_vma+0x5af/0x950 [ 30.724876] ? __pfx___split_vma+0x10/0x10 [ 30.725447] ? find_held_lock+0x2c/0x110 [ 30.725996] do_vmi_align_munmap+0x2ba/0x11f0 [ 30.726602] ? lock_is_held_type+0x9f/0x120 [ 30.727160] ? __pfx_do_vmi_align_munmap+0x10/0x10 [ 30.727778] ? mtree_range_walk+0x632/0x900 [ 30.728344] ? mas_walk+0x5c7/0x7c0 [ 30.728824] do_vmi_munmap+0x1f1/0x2b0 [ 30.729320] mmap_region+0x1f9/0x2660 [ 30.729808] ? vm_mmap_pgoff+0x15c/0x3a0 [ 30.730323] ? __pfx_arch_get_unmapped_area_topdown+0x10/0x10 [ 30.731046] ? __pfx_lock_acquire+0x10/0x10 [ 30.731583] ? __pfx_mmap_region+0x10/0x10 [ 30.732118] ? security_mmap_addr+0x7d/0xa0 [ 30.732677] ? get_unmapped_area+0x1f5/0x3f0 [ 30.733234] do_mmap+0x854/0xf00 [ 30.733687] vm_mmap_pgoff+0x1a6/0x3a0 [ 30.734184] ? __pfx_vm_mmap_pgoff+0x10/0x10 [ 30.734765] ksys_mmap_pgoff+0x3af/0x500 [ 30.735273] do_syscall_64+0x3f/0x90 [ 30.735759] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 30.736416] RIP: 0033:0x7f621a400d82 [ 30.736888] 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 [ 30.739007] RSP: 002b:00007ffc584ff4a8 EFLAGS: 00000206 ORIG_RAX: 0000000000000009 [ 30.739921] RAX: ffffffffffffffda RBX: 0000000000000812 RCX: 00007f621a400d82 [ 30.740775] RDX: 0000000000000005 RSI: 0000000000001000 RDI: 00007f621983a000 [ 30.741623] RBP: 00007f621983a000 R08: 0000000000000009 R09: 0000000000001000 [ 30.742464] R10: 0000000000000812 R11: 0000000000000206 R12: 000055cf8c84ff70 [ 30.743314] R13: 00007ffc584ff4c0 R14: 00007ffc584ff4f0 R15: 00007ffc584ff850 [ 30.744176] [ 30.744488] [ 30.744705] Allocated by task 213: [ 30.745133] kasan_save_stack+0x22/0x50 [ 30.745639] kasan_set_track+0x25/0x30 [ 30.746140] __kasan_slab_alloc+0x59/0x70 [ 30.746663] kmem_cache_alloc+0x16b/0x370 [ 30.747188] vm_area_dup+0x20/0x160 [ 30.747650] __split_vma+0x170/0x950 [ 30.748119] split_vma+0xc6/0x110 [ 30.748567] mprotect_fixup+0x8d2/0xb30 [ 30.749077] do_mprotect_pkey+0x87e/0xd40 [ 30.749598] __x64_sys_mprotect+0x78/0xc0 [ 30.750119] do_syscall_64+0x3f/0x90 [ 30.750592] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 30.751230] [ 30.751448] Freed by task 213: [ 30.751840] kasan_save_stack+0x22/0x50 [ 30.752356] kasan_set_track+0x25/0x30 [ 30.752854] kasan_save_free_info+0x2b/0x50 [ 30.753391] __kasan_slab_free+0x10a/0x190 [ 30.753934] kmem_cache_free+0x10d/0x4d0 [ 30.754457] rcu_core+0x8c8/0x2860 [ 30.754901] __do_softirq+0x1b7/0x7d4 [ 30.755385] [ 30.755604] Last potentially related work creation: [ 30.756197] kasan_save_stack+0x22/0x50 [ 30.756733] __kasan_record_aux_stack+0x8e/0xa0 [ 30.757316] __call_rcu_common.constprop.0+0x6a/0xb90 [ 30.757983] remove_vma+0x139/0x170 [ 30.758437] do_vmi_align_munmap+0xd4a/0x11f0 [ 30.758997] do_vmi_munmap+0x1f1/0x2b0 [ 30.759489] __vm_munmap+0x138/0x3a0 [ 30.759962] __x64_sys_munmap+0x59/0x80 [ 30.760466] do_syscall_64+0x3f/0x90 [ 30.760950] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 30.761609] [ 30.761824] The buggy address belongs to the object at ffff8880186d3bc8 [ 30.761824] which belongs to the cache vm_area_struct of size 168 [ 30.763313] The buggy address is located 88 bytes inside of [ 30.763313] freed 168-byte region [ffff8880186d3bc8, ffff8880186d3c70) [ 30.764736] [ 30.764954] The buggy address belongs to the physical page: [ 30.765613] page:00000000ba6b046c refcount:1 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0x186d3 [ 30.766716] memcg:ffff88800d933401 [ 30.767143] flags: 0x100000000000200(slab|node=0|zone=1) [ 30.767796] page_type: 0xffffffff() [ 30.768250] raw: 0100000000000200 ffff8880087a0c80 dead000000000122 0000000000000000 [ 30.769199] raw: 0000000000000000 0000000000110011 00000001ffffffff ffff88800d933401 [ 30.770121] page dumped because: kasan: bad access detected [ 30.770797] [ 30.771015] Memory state around the buggy address: [ 30.771608] ffff8880186d3b00: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 [ 30.772472] ffff8880186d3b80: 00 fc fc fc fc fc fc fc fc fa fb fb fb fb fb fb [ 30.773380] >ffff8880186d3c00: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fc fc [ 30.774250] ^ [ 30.774791] ffff8880186d3c80: fc fc fc fc fc fc fa fb fb fb fb fb fb fb fb fb [ 30.775668] ffff8880186d3d00: fb fb fb fb fb fb fb fb fb fb fb fc fc fc fc fc [ 30.776534] ================================================================== [ 30.777727] Disabling lock debugging due to kernel taint [ 32.886685] BUG: Bad rss-counter state mm:000000005d941d8c type:MM_FILEPAGES val:33 [ 32.887946] BUG: Bad rss-counter state mm:000000005d941d8c type:MM_ANONPAGES val:22 [ 33.406361] BUG: Bad rss-counter state mm:0000000091f2771d type:MM_FILEPAGES val:33 [ 33.407110] BUG: Bad rss-counter state mm:0000000091f2771d type:MM_ANONPAGES val:22 Warning: Permanently added '[localhost]:8279' (ECDSA) to the list of known hosts. 2023/06/21 07:57:22 fuzzer started 2023/06/21 07:57:22 dialing manager at localhost:36067 2023/06/21 07:57:22 checking machine... 2023/06/21 07:57:22 checking revisions... [ 33.952097] kmemleak: Automatic memory scanning thread ended 2023/06/21 07:57:22 testing simple program... [ 34.003717] cgroup: Unknown subsys name 'net' [ 34.069139] cgroup: Unknown subsys name 'rlimit' executing program executing program executing program VM DIAGNOSIS: 07:57:22 Registers: info registers vcpu 0 RAX=0000000000000000 RBX=00000000714f59ad RCX=0000000000000000 RDX=ffff8880168e3680 RSI=ffffffff8219d32d RDI=0000000000000007 RBP=ffff888015ebcd00 RSP=ffff888017fcf650 R8 =0000000000000007 R9 =0000000000000000 R10=0000000000000000 R11=00000000000b6a61 R12=0000000000000000 R13=ffffffff849f2d80 R14=000000000000007c R15=ffff888017fcf790 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 00007f71a2599700 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=00007fde9ba141a0 CR3=000000000ec8c000 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=2032323a37353a3730203132206e754a XMM01=657463656e6e6f63736944203a5d3932 XMM02=302e303120746f6f722072657375206d XMM03=203a5d3932325b646873732072656c6c XMM04=69662068637573206f4e203a656c6163 XMM05=3a656c696620766e65206e65706f206f XMM06=65733a6468737328766e655f6d617020 XMM07=6b7a79732031323a37353a3730203132 XMM08=3d656e696c646d632022656369767265 XMM09=00000000000000000000000000000000 XMM10=00000000000000000000000000000000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000 info registers vcpu 1 RAX=0000000080000000 RBX=0000000000000fe0 RCX=ffffffff8184ce75 RDX=ffff888016430000 RSI=0000000000000000 RDI=0000000000000006 RBP=ffff88800e3e1000 RSP=ffff88801c98fcd0 R8 =0000000000000006 R9 =ffff88800e3e0020 R10=ffff88800e3e0fff R11=0000000000000000 R12=ffff88800e3e0020 R13=0000000000000000 R14=ffff88800e3e0fff R15=ffffffff85d3e300 RIP=ffffffff814c086b RFL=00000297 [--S-APC] 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 00007f33cdb4d900 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=00007ffdddc75000 CR3=000000000ec96000 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