syzkaller login: [ 31.046405] BUG: Bad rss-counter state mm:00000000ce0fe92f type:MM_FILEPAGES val:33 [ 31.047876] BUG: Bad rss-counter state mm:00000000ce0fe92f type:MM_ANONPAGES val:22 [ 31.224628] ================================================================== [ 31.225651] BUG: KASAN: slab-use-after-free in vma_interval_tree_remove+0xc75/0xec0 [ 31.226670] Read of size 8 at addr ffff88800fbce6b0 by task sshd/219 [ 31.227515] [ 31.227830] CPU: 0 PID: 219 Comm: sshd Not tainted 6.4.0-rc7-next-20230620 #1 [ 31.228777] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS 1.12.0-1 04/01/2014 [ 31.229806] Call Trace: [ 31.230148] [ 31.230465] dump_stack_lvl+0x91/0xf0 [ 31.230991] print_report+0xcc/0x620 [ 31.231508] ? __virt_addr_valid+0x102/0x340 [ 31.232092] ? vma_interval_tree_remove+0xc75/0xec0 [ 31.232750] ? vma_interval_tree_remove+0xc75/0xec0 [ 31.233406] kasan_report+0xbe/0xf0 [ 31.233917] ? vma_interval_tree_remove+0xc75/0xec0 [ 31.234586] vma_interval_tree_remove+0xc75/0xec0 [ 31.235230] vma_prepare+0xc54/0x11a0 [ 31.235739] __split_vma+0x5af/0x950 [ 31.236242] ? __pfx___split_vma+0x10/0x10 [ 31.236804] ? find_held_lock+0x2c/0x110 [ 31.237359] do_vmi_align_munmap+0x2ba/0x11f0 [ 31.237959] ? lock_is_held_type+0x9f/0x120 [ 31.238553] ? __pfx_do_vmi_align_munmap+0x10/0x10 [ 31.239195] ? mtree_range_walk+0x632/0x900 [ 31.239789] ? mas_walk+0x5c7/0x7c0 [ 31.240300] do_vmi_munmap+0x1f1/0x2b0 [ 31.240823] mmap_region+0x1f9/0x2660 [ 31.241337] ? vm_mmap_pgoff+0x15c/0x3a0 [ 31.241890] ? __pfx_arch_get_unmapped_area_topdown+0x10/0x10 [ 31.242655] ? __pfx_lock_acquire+0x10/0x10 [ 31.243217] ? __pfx_mmap_region+0x10/0x10 [ 31.243783] ? security_mmap_addr+0x7d/0xa0 [ 31.244349] ? get_unmapped_area+0x1f5/0x3f0 [ 31.244939] do_mmap+0x854/0xf00 [ 31.245405] vm_mmap_pgoff+0x1a6/0x3a0 [ 31.245931] ? __pfx_vm_mmap_pgoff+0x10/0x10 [ 31.246558] ksys_mmap_pgoff+0x3af/0x500 [ 31.247099] do_syscall_64+0x3f/0x90 [ 31.247610] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 31.248299] RIP: 0033:0x7fb3a28f3d82 [ 31.248786] 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 [ 31.251051] RSP: 002b:00007fff2a528668 EFLAGS: 00000206 ORIG_RAX: 0000000000000009 [ 31.252016] RAX: ffffffffffffffda RBX: 0000000000000812 RCX: 00007fb3a28f3d82 [ 31.252916] RDX: 0000000000000005 RSI: 0000000000001000 RDI: 00007fb3a1d2d000 [ 31.253833] RBP: 00007fb3a1d2d000 R08: 0000000000000009 R09: 0000000000001000 [ 31.254745] R10: 0000000000000812 R11: 0000000000000206 R12: 0000558f85245d90 [ 31.255672] R13: 00007fff2a528680 R14: 00007fff2a5286b0 R15: 00007fff2a528a10 [ 31.256623] [ 31.256959] [ 31.257195] Allocated by task 212: [ 31.257667] kasan_save_stack+0x22/0x50 [ 31.258216] kasan_set_track+0x25/0x30 [ 31.258780] __kasan_slab_alloc+0x59/0x70 [ 31.259362] kmem_cache_alloc+0x16b/0x370 [ 31.259912] vm_area_dup+0x20/0x160 [ 31.260395] __split_vma+0x170/0x950 [ 31.260892] split_vma+0xc6/0x110 [ 31.261380] mprotect_fixup+0x8d2/0xb30 [ 31.261927] do_mprotect_pkey+0x87e/0xd40 [ 31.262516] __x64_sys_mprotect+0x78/0xc0 [ 31.263093] do_syscall_64+0x3f/0x90 [ 31.263612] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 31.264313] [ 31.264541] Freed by task 212: [ 31.264958] kasan_save_stack+0x22/0x50 [ 31.265497] kasan_set_track+0x25/0x30 [ 31.266030] kasan_save_free_info+0x2b/0x50 [ 31.266607] __kasan_slab_free+0x10a/0x190 [ 31.267181] kmem_cache_free+0x10d/0x4d0 [ 31.267725] rcu_core+0x8c8/0x2860 [ 31.268203] __do_softirq+0x1b7/0x7d4 [ 31.268723] [ 31.268952] Last potentially related work creation: [ 31.269588] kasan_save_stack+0x22/0x50 [ 31.270129] __kasan_record_aux_stack+0x8e/0xa0 [ 31.270758] __call_rcu_common.constprop.0+0x6a/0xb90 [ 31.271449] remove_vma+0x139/0x170 [ 31.271935] do_vmi_align_munmap+0xd4a/0x11f0 [ 31.272536] do_vmi_munmap+0x1f1/0x2b0 [ 31.273059] __vm_munmap+0x138/0x3a0 [ 31.273558] __x64_sys_munmap+0x59/0x80 [ 31.274089] do_syscall_64+0x3f/0x90 [ 31.274601] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 31.275296] [ 31.275529] The buggy address belongs to the object at ffff88800fbce658 [ 31.275529] which belongs to the cache vm_area_struct of size 168 [ 31.277105] The buggy address is located 88 bytes inside of [ 31.277105] freed 168-byte region [ffff88800fbce658, ffff88800fbce700) [ 31.278614] [ 31.278848] The buggy address belongs to the physical page: [ 31.279556] page:00000000acf98286 refcount:1 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0xfbce [ 31.280716] memcg:ffff888019dc2f01 [ 31.281175] flags: 0x100000000000200(slab|node=0|zone=1) [ 31.281867] page_type: 0xffffffff() [ 31.282351] raw: 0100000000000200 ffff8880087a0c80 dead000000000122 0000000000000000 [ 31.283358] raw: 0000000000000000 0000000000110011 00000001ffffffff ffff888019dc2f01 [ 31.284331] page dumped because: kasan: bad access detected [ 31.285047] [ 31.285277] Memory state around the buggy address: [ 31.285897] ffff88800fbce580: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 [ 31.286813] ffff88800fbce600: 00 00 00 fc fc fc fc fc fc fc fc fa fb fb fb fb [ 31.287723] >ffff88800fbce680: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb [ 31.288632] ^ [ 31.289254] ffff88800fbce700: fc fc fc fc fc fc fc fc fa fb fb fb fb fb fb fb [ 31.290166] ffff88800fbce780: fb fb fb fb fb fb fb fb fb fb fb fb fb fc fc fc [ 31.291096] ================================================================== [ 31.292195] Disabling lock debugging due to kernel taint [ 34.103831] BUG: Bad rss-counter state mm:0000000028d436ab type:MM_FILEPAGES val:33 [ 34.104812] BUG: Bad rss-counter state mm:0000000028d436ab type:MM_ANONPAGES val:22 [ 34.574132] BUG: Bad rss-counter state mm:0000000058e5c05f type:MM_FILEPAGES val:33 [ 34.574955] BUG: Bad rss-counter state mm:0000000058e5c05f type:MM_ANONPAGES val:22 Warning: Permanently added '[localhost]:14666' (ECDSA) to the list of known hosts. 2023/06/20 11:28:06 fuzzer started 2023/06/20 11:28:06 dialing manager at localhost:36067 2023/06/20 11:28:06 checking machine... 2023/06/20 11:28:06 checking revisions... [ 35.236820] kmemleak: Automatic memory scanning thread ended 2023/06/20 11:28:06 testing simple program... [ 35.289067] cgroup: Unknown subsys name 'net' [ 35.330415] cgroup: Unknown subsys name 'rlimit' executing program executing program executing program VM DIAGNOSIS: 11:28:05 Registers: info registers vcpu 0 RAX=ffff88806ce35000 RBX=0000000000000000 RCX=ffffffff8451250e RDX=ffffed100d9c6a01 RSI=0000000000000004 RDI=ffffffff81288ac5 RBP=dffffc0000000000 RSP=ffffffff85407e10 R8 =0000000000000000 R9 =ffffed100d9c6a00 R10=ffff88806ce35003 R11=ffff888008c04000 R12=ffffffff85d3d350 R13=1ffffffff0a80fc7 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 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=00007f8fa2528f50 CR3=0000000008c70000 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=2035303a38323a3131203032206e754a XMM01=657463656e6e6f63736944203a5d3832 XMM02=302e303120746f6f722072657375206d XMM03=203a5d3832325b646873732072656c6c XMM04=69662068637573206f4e203a656c6163 XMM05=3a656c696620766e65206e65706f206f XMM06=65733a6468737328766e655f6d617020 XMM07=6b7a79732035303a38323a3131203032 XMM08=3d656e696c646d632022656369767265 XMM09=00000000000000000000000000000000 XMM10=00000000000000000000000000000000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000 info registers vcpu 1 RAX=1ffffffff0bb7aff RBX=ffffffff85dbd7fc RCX=ffffffff813ad71f RDX=0000000000000000 RSI=ffffffff860d8256 RDI=ffffffff85dbd7f8 RBP=ffffffff85dbd7f8 RSP=ffff8880168ff2f0 R8 =ffffffff860d8256 R9 =ffff8880168ff3e8 R10=0000000000038001 R11=0000000000010b8d R12=ffffffff85dbd800 R13=ffffffff85dbd7f8 R14=ffffffff85dbd7f8 R15=dffffc0000000000 RIP=ffffffff8112fc7f RFL=00000217 [----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 00007fbf1dbd5900 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=00007ffebd50b000 CR3=0000000019b3e000 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