syzkaller login: [ 33.299236] BUG: Bad rss-counter state mm:00000000815f85a3 type:MM_FILEPAGES val:33 [ 33.300448] BUG: Bad rss-counter state mm:00000000815f85a3 type:MM_ANONPAGES val:22 [ 33.347645] ================================================================== [ 33.348623] BUG: KASAN: slab-use-after-free in vma_interval_tree_remove+0xc75/0xec0 [ 33.349575] Read of size 8 at addr ffff888018044140 by task sshd/221 [ 33.350382] [ 33.350603] CPU: 1 PID: 221 Comm: sshd Not tainted 6.4.0-rc7-next-20230619 #1 [ 33.351471] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS 1.12.0-1 04/01/2014 [ 33.352445] Call Trace: [ 33.352765] [ 33.353061] dump_stack_lvl+0x91/0xf0 [ 33.353561] print_report+0xcc/0x620 [ 33.354054] ? __virt_addr_valid+0x102/0x340 [ 33.354616] ? vma_interval_tree_remove+0xc75/0xec0 [ 33.355251] ? vma_interval_tree_remove+0xc75/0xec0 [ 33.355897] kasan_report+0xbe/0xf0 [ 33.356389] ? vma_interval_tree_remove+0xc75/0xec0 [ 33.357014] vma_interval_tree_remove+0xc75/0xec0 [ 33.357638] vma_prepare+0xc54/0x11a0 [ 33.358116] __split_vma+0x5af/0x950 [ 33.358592] ? __pfx___split_vma+0x10/0x10 [ 33.359127] ? find_held_lock+0x2c/0x110 [ 33.359655] do_vmi_align_munmap+0x2ba/0x11f0 [ 33.360222] ? lock_is_held_type+0x9f/0x120 [ 33.360767] ? __pfx_do_vmi_align_munmap+0x10/0x10 [ 33.361398] ? mtree_range_walk+0x632/0x900 [ 33.361949] ? mas_walk+0x5c7/0x7c0 [ 33.362424] do_vmi_munmap+0x1f1/0x2b0 [ 33.362911] mmap_region+0x1f9/0x2660 [ 33.363397] ? vm_mmap_pgoff+0x15c/0x3a0 [ 33.363914] ? __pfx_arch_get_unmapped_area_topdown+0x10/0x10 [ 33.364638] ? __pfx_lock_acquire+0x10/0x10 [ 33.365187] ? __pfx_mmap_region+0x10/0x10 [ 33.365719] ? security_mmap_addr+0x7d/0xa0 [ 33.366252] ? get_unmapped_area+0x1f5/0x3f0 [ 33.366806] do_mmap+0x854/0xf00 [ 33.367246] vm_mmap_pgoff+0x1a6/0x3a0 [ 33.367750] ? __pfx_vm_mmap_pgoff+0x10/0x10 [ 33.368313] ksys_mmap_pgoff+0x3af/0x500 [ 33.368819] do_syscall_64+0x3f/0x90 [ 33.369305] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 33.369949] RIP: 0033:0x7f56a0f3bd82 [ 33.370405] 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 [ 33.372515] RSP: 002b:00007ffec8bafd48 EFLAGS: 00000206 ORIG_RAX: 0000000000000009 [ 33.373444] RAX: ffffffffffffffda RBX: 0000000000000812 RCX: 00007f56a0f3bd82 [ 33.374284] RDX: 0000000000000005 RSI: 0000000000001000 RDI: 00007f56a0375000 [ 33.375130] RBP: 00007f56a0375000 R08: 0000000000000009 R09: 0000000000001000 [ 33.375982] R10: 0000000000000812 R11: 0000000000000206 R12: 00005627b2f95ec0 [ 33.376818] R13: 00007ffec8bafd60 R14: 00007ffec8bafd90 R15: 00007ffec8bb00f0 [ 33.377695] [ 33.377991] [ 33.378204] Allocated by task 214: [ 33.378634] kasan_save_stack+0x22/0x50 [ 33.379140] kasan_set_track+0x25/0x30 [ 33.379641] __kasan_slab_alloc+0x59/0x70 [ 33.380159] kmem_cache_alloc+0x16b/0x370 [ 33.380670] vm_area_dup+0x20/0x160 [ 33.381145] __split_vma+0x170/0x950 [ 33.381618] split_vma+0xc6/0x110 [ 33.382060] mprotect_fixup+0x8d2/0xb30 [ 33.382570] do_mprotect_pkey+0x87e/0xd40 [ 33.383097] __x64_sys_mprotect+0x78/0xc0 [ 33.383617] do_syscall_64+0x3f/0x90 [ 33.384089] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 33.384747] [ 33.384964] Freed by task 19: [ 33.385367] kasan_save_stack+0x22/0x50 [ 33.385867] kasan_set_track+0x25/0x30 [ 33.386362] kasan_save_free_info+0x2b/0x50 [ 33.386892] __kasan_slab_free+0x10a/0x190 [ 33.387424] kmem_cache_free+0x10d/0x4d0 [ 33.387941] rcu_core+0x8c8/0x2860 [ 33.388381] __do_softirq+0x1b7/0x7d4 [ 33.388860] [ 33.389084] Last potentially related work creation: [ 33.389667] kasan_save_stack+0x22/0x50 [ 33.390168] __kasan_record_aux_stack+0x8e/0xa0 [ 33.390740] __call_rcu_common.constprop.0+0x6a/0xb90 [ 33.391378] remove_vma+0x139/0x170 [ 33.391832] do_vmi_align_munmap+0xd4a/0x11f0 [ 33.392385] do_vmi_munmap+0x1f1/0x2b0 [ 33.392873] __vm_munmap+0x138/0x3a0 [ 33.393360] __x64_sys_munmap+0x59/0x80 [ 33.393856] do_syscall_64+0x3f/0x90 [ 33.394329] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 33.394967] [ 33.395180] The buggy address belongs to the object at ffff8880180440e8 [ 33.395180] which belongs to the cache vm_area_struct of size 168 [ 33.396640] The buggy address is located 88 bytes inside of [ 33.396640] freed 168-byte region [ffff8880180440e8, ffff888018044190) [ 33.398074] [ 33.398291] The buggy address belongs to the physical page: [ 33.398945] page:000000008e657b87 refcount:1 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0x18044 [ 33.400035] memcg:ffff88800e853a01 [ 33.400462] flags: 0x100000000000200(slab|node=0|zone=1) [ 33.401114] page_type: 0xffffffff() [ 33.401562] raw: 0100000000000200 ffff88800879fc80 dead000000000122 0000000000000000 [ 33.402482] raw: 0000000000000000 0000000000110011 00000001ffffffff ffff88800e853a01 [ 33.403387] page dumped because: kasan: bad access detected [ 33.404056] [ 33.404268] Memory state around the buggy address: [ 33.404865] ffff888018044000: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 [ 33.405743] ffff888018044080: 00 00 00 00 00 fc fc fc fc fc fc fc fc fa fb fb [ 33.406602] >ffff888018044100: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb [ 33.407452] ^ [ 33.408108] ffff888018044180: fb fb fc fc fc fc fc fc fc fc fa fb fb fb fb fb [ 33.408963] ffff888018044200: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fc [ 33.409832] ================================================================== [ 33.411292] Disabling lock debugging due to kernel taint [ 36.150534] BUG: Bad rss-counter state mm:0000000042176635 type:MM_FILEPAGES val:33 [ 36.151720] BUG: Bad rss-counter state mm:0000000042176635 type:MM_ANONPAGES val:22 [ 36.637570] BUG: Bad rss-counter state mm:000000002bfdc292 type:MM_FILEPAGES val:33 [ 36.638561] BUG: Bad rss-counter state mm:000000002bfdc292 type:MM_ANONPAGES val:22 Warning: Permanently added '[localhost]:44851' (ECDSA) to the list of known hosts. 2023/06/19 16:19:26 fuzzer started 2023/06/19 16:19:26 dialing manager at localhost:44161 2023/06/19 16:19:26 checking machine... 2023/06/19 16:19:26 checking revisions... [ 37.361046] kmemleak: Automatic memory scanning thread ended 2023/06/19 16:19:27 testing simple program... [ 37.412722] cgroup: Unknown subsys name 'net' [ 37.463966] cgroup: Unknown subsys name 'rlimit' executing program executing program executing program VM DIAGNOSIS: 16:19:23 Registers: info registers vcpu 0 RAX=ffff88806ce35000 RBX=0000000000000000 RCX=ffffffff8450c50e RDX=ffffed100d9c6a01 RSI=0000000000000004 RDI=ffffffff812889a5 RBP=dffffc0000000000 RSP=ffffffff85407e10 R8 =0000000000000000 R9 =ffffed100d9c6a00 R10=ffff88806ce35003 R11=ffff888008c58000 R12=ffffffff85d3bed0 R13=1ffffffff0a80fc7 R14=0000000000000000 R15=0000000000000000 RIP=ffffffff8450d49f 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=0000560e9150a290 CR3=000000000db32000 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=2036323a39313a3631203931206e754a XMM01=657463656e6e6f63736944203a5d3033 XMM02=302e303120746f6f722072657375206d XMM03=203a5d3033325b646873732072656c6c XMM04=69662068637573206f4e203a656c6163 XMM05=3a656c696620766e65206e65706f206f XMM06=65733a6468737328766e655f6d617020 XMM07=6b7a79732036323a39313a3631203931 XMM08=3d656e696c646d632022656369767265 XMM09=00000000000000000000000000000000 XMM10=00000000000000000000000000000000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000 info registers vcpu 1 RAX=dffffc0000000000 RBX=ffffffff81809911 RCX=0000000000000001 RDX=1ffff11001e16ebb RSI=ffff88800f0b7910 RDI=ffffffff81809911 RBP=ffff88800f0b75d8 RSP=ffff88800f0b7550 R8 =0000000000000001 R9 =ffff88800f0b75c0 R10=0000000000038001 R11=000000000000fc0f R12=ffff88800f0b7648 R13=0000000000000000 R14=ffff888016e3d1c0 R15=0000000000000000 RIP=ffffffff811fc7a0 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 00007ff0142cb900 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=00007ff014882618 CR3=000000000cac4000 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