syzkaller login: [ 33.544663] BUG: Bad rss-counter state mm:0000000060a0ba40 type:MM_FILEPAGES val:33 [ 33.545249] BUG: Bad rss-counter state mm:0000000060a0ba40 type:MM_ANONPAGES val:22 [ 33.716620] ================================================================== [ 33.717582] BUG: KASAN: slab-use-after-free in vma_interval_tree_remove+0xc75/0xec0 [ 33.718567] Read of size 8 at addr ffff88800c6cf228 by task sshd/220 [ 33.719342] [ 33.719562] CPU: 1 PID: 220 Comm: sshd Not tainted 6.4.0-rc7-next-20230619 #1 [ 33.720606] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS 1.12.0-1 04/01/2014 [ 33.721597] Call Trace: [ 33.721947] [ 33.722234] dump_stack_lvl+0x91/0xf0 [ 33.722770] print_report+0xcc/0x620 [ 33.723265] ? __virt_addr_valid+0x102/0x340 [ 33.723842] ? vma_interval_tree_remove+0xc75/0xec0 [ 33.724472] ? vma_interval_tree_remove+0xc75/0xec0 [ 33.725095] kasan_report+0xbe/0xf0 [ 33.725586] ? vma_interval_tree_remove+0xc75/0xec0 [ 33.726442] vma_interval_tree_remove+0xc75/0xec0 [ 33.727176] vma_prepare+0xc54/0x11a0 [ 33.727747] __split_vma+0x5af/0x950 [ 33.728306] ? __pfx___split_vma+0x10/0x10 [ 33.728938] ? find_held_lock+0x2c/0x110 [ 33.729549] do_vmi_align_munmap+0x2ba/0x11f0 [ 33.730238] ? lock_is_held_type+0x9f/0x120 [ 33.730877] ? __pfx_do_vmi_align_munmap+0x10/0x10 [ 33.731593] ? mtree_range_walk+0x632/0x900 [ 33.732258] ? mas_walk+0x5c7/0x7c0 [ 33.732825] do_vmi_munmap+0x1f1/0x2b0 [ 33.733406] mmap_region+0x1f9/0x2660 [ 33.734012] ? vm_mmap_pgoff+0x15c/0x3a0 [ 33.734623] ? __pfx_arch_get_unmapped_area_topdown+0x10/0x10 [ 33.735329] ? __pfx_lock_acquire+0x10/0x10 [ 33.735861] ? __pfx_mmap_region+0x10/0x10 [ 33.736392] ? security_mmap_addr+0x7d/0xa0 [ 33.736920] ? get_unmapped_area+0x1f5/0x3f0 [ 33.737464] do_mmap+0x854/0xf00 [ 33.737918] vm_mmap_pgoff+0x1a6/0x3a0 [ 33.738414] ? __pfx_vm_mmap_pgoff+0x10/0x10 [ 33.738974] ksys_mmap_pgoff+0x3af/0x500 [ 33.739476] do_syscall_64+0x3f/0x90 [ 33.739955] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 33.740596] RIP: 0033:0x7fe3af9d1d82 [ 33.741056] 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 [ 33.743179] RSP: 002b:00007ffdce5a7608 EFLAGS: 00000206 ORIG_RAX: 0000000000000009 [ 33.744080] RAX: ffffffffffffffda RBX: 0000000000000812 RCX: 00007fe3af9d1d82 [ 33.744926] RDX: 0000000000000005 RSI: 0000000000001000 RDI: 00007fe3aee0b000 [ 33.745784] RBP: 00007fe3aee0b000 R08: 0000000000000009 R09: 0000000000001000 [ 33.746629] R10: 0000000000000812 R11: 0000000000000206 R12: 000055ef5de28b20 [ 33.747474] R13: 00007ffdce5a7620 R14: 00007ffdce5a7650 R15: 00007ffdce5a79b0 [ 33.748330] [ 33.748622] [ 33.748837] Allocated by task 213: [ 33.749279] kasan_save_stack+0x22/0x50 [ 33.749798] kasan_set_track+0x25/0x30 [ 33.750289] __kasan_slab_alloc+0x59/0x70 [ 33.750820] kmem_cache_alloc+0x16b/0x370 [ 33.751346] vm_area_dup+0x20/0x160 [ 33.751804] __split_vma+0x170/0x950 [ 33.752274] split_vma+0xc6/0x110 [ 33.752715] mprotect_fixup+0x8d2/0xb30 [ 33.753219] do_mprotect_pkey+0x87e/0xd40 [ 33.753751] __x64_sys_mprotect+0x78/0xc0 [ 33.754268] do_syscall_64+0x3f/0x90 [ 33.754741] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 33.755375] [ 33.755589] Freed by task 213: [ 33.755984] kasan_save_stack+0x22/0x50 [ 33.756489] kasan_set_track+0x25/0x30 [ 33.756985] kasan_save_free_info+0x2b/0x50 [ 33.757529] __kasan_slab_free+0x10a/0x190 [ 33.758070] kmem_cache_free+0x10d/0x4d0 [ 33.758588] rcu_core+0x8c8/0x2860 [ 33.759034] __do_softirq+0x1b7/0x7d4 [ 33.759509] [ 33.759727] Last potentially related work creation: [ 33.760315] kasan_save_stack+0x22/0x50 [ 33.760823] __kasan_record_aux_stack+0x8e/0xa0 [ 33.761467] __call_rcu_common.constprop.0+0x6a/0xb90 [ 33.762143] remove_vma+0x139/0x170 [ 33.762592] do_vmi_align_munmap+0xd4a/0x11f0 [ 33.763156] do_vmi_munmap+0x1f1/0x2b0 [ 33.763640] __vm_munmap+0x138/0x3a0 [ 33.764112] __x64_sys_munmap+0x59/0x80 [ 33.764607] do_syscall_64+0x3f/0x90 [ 33.765082] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 33.765731] [ 33.765948] The buggy address belongs to the object at ffff88800c6cf1d0 [ 33.765948] which belongs to the cache vm_area_struct of size 168 [ 33.767415] The buggy address is located 88 bytes inside of [ 33.767415] freed 168-byte region [ffff88800c6cf1d0, ffff88800c6cf278) [ 33.768803] [ 33.769015] The buggy address belongs to the physical page: [ 33.769767] page:0000000080e5c505 refcount:1 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0xc6cf [ 33.771099] memcg:ffff88800c72e101 [ 33.771626] anon flags: 0x100000000000200(slab|node=0|zone=1) [ 33.772495] page_type: 0xffffffff() [ 33.773039] raw: 0100000000000200 ffff88800879fc80 0000000000000000 dead000000000001 [ 33.774176] raw: 0000000000000000 0000000000110011 00000001ffffffff ffff88800c72e101 [ 33.775267] page dumped because: kasan: bad access detected [ 33.776074] [ 33.776335] Memory state around the buggy address: [ 33.777042] ffff88800c6cf100: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb [ 33.778095] ffff88800c6cf180: fb fb fc fc fc fc fc fc fc fc fa fb fb fb fb fb [ 33.779132] >ffff88800c6cf200: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fc [ 33.780170] ^ [ 33.780844] ffff88800c6cf280: fc fc fc fc fc fc fc fa fb fb fb fb fb fb fb fb [ 33.781888] ffff88800c6cf300: fb fb fb fb fb fb fb fb fb fb fb fb fc fc fc fc [ 33.782920] ================================================================== [ 33.784114] Disabling lock debugging due to kernel taint [ 35.742879] BUG: Bad rss-counter state mm:00000000a5eef604 type:MM_FILEPAGES val:33 [ 35.744057] BUG: Bad rss-counter state mm:00000000a5eef604 type:MM_ANONPAGES val:22 [ 36.165807] BUG: Bad rss-counter state mm:000000009559c0e1 type:MM_FILEPAGES val:33 [ 36.166801] BUG: Bad rss-counter state mm:000000009559c0e1 type:MM_ANONPAGES val:22 Warning: Permanently added '[localhost]:48822' (ECDSA) to the list of known hosts. 2023/06/20 04:11:25 fuzzer started 2023/06/20 04:11:26 dialing manager at localhost:44161 2023/06/20 04:11:26 checking machine... 2023/06/20 04:11:26 checking revisions... [ 36.867588] kmemleak: Automatic memory scanning thread ended 2023/06/20 04:11:26 testing simple program... [ 36.898322] cgroup: Unknown subsys name 'net' [ 36.946113] cgroup: Unknown subsys name 'rlimit' executing program executing program executing program VM DIAGNOSIS: 04:11:23 Registers: info registers vcpu 0 RAX=0000000000000000 RBX=1ffff11001d00fbe RCX=0000000000000000 RDX=ffff88800f280000 RSI=ffffffff836358a7 RDI=0000000000000009 RBP=0000000000000009 RSP=ffff88800e807db0 R8 =0000000000000000 R9 =0000000000000000 R10=ffffffff85d3bed7 R11=0000000000000000 R12=ffff88800e807e20 R13=ffff88800e807e10 R14=0000000000000000 R15=0000000000000000 RIP=ffffffff818ea934 RFL=00000293 [--S-A-C] 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 00007f6a9bf52900 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=00007f6a9c509618 CR3=0000000016b6e000 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=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 info registers vcpu 1 RAX=ffff88806cf35000 RBX=0000000000000001 RCX=ffffffff8450c50e RDX=ffffed100d9e6a01 RSI=0000000000000004 RDI=ffffffff812889a5 RBP=dffffc0000000000 RSP=ffff888008e27e70 R8 =0000000000000000 R9 =ffffed100d9e6a00 R10=ffff88806cf35003 R11=ffff888008c58400 R12=ffffffff85d3bed0 R13=1ffff110011c4fd3 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 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=00007f4bd3a24e50 CR3=0000000008db8000 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=610f5e5ae22cd28e4840e7b10734aa1e XMM02=ec2efd57dc4c00df00000000001218c0 XMM03=7251161afb4e58a50000000000121990 XMM04=0800a1a5df74532d00000000000ae988 XMM05=19e9129bd510f2350000000000134d98 XMM06=0cd33418a2ff677b0000000000133c00 XMM07=e042d86d42eb936e0000000000125480 XMM08=7251161afb4e58a50000000000121990 XMM09=00000000000000000000000000000000 XMM10=20200000000020202020202020200000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000