syzkaller login: [ 29.997398] BUG: Bad rss-counter state mm:00000000692d0cf6 type:MM_FILEPAGES val:33 [ 29.998118] BUG: Bad rss-counter state mm:00000000692d0cf6 type:MM_ANONPAGES val:22 [ 30.196845] ================================================================== [ 30.197432] BUG: KASAN: slab-use-after-free in vma_interval_tree_remove+0xc75/0xec0 [ 30.198015] Read of size 8 at addr ffff888009d75d08 by task sshd/222 [ 30.198513] [ 30.198660] CPU: 1 PID: 222 Comm: sshd Not tainted 6.4.0-rc7-next-20230620 #1 [ 30.199194] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS 1.12.0-1 04/01/2014 [ 30.199794] Call Trace: [ 30.199997] <TASK> [ 30.200176] dump_stack_lvl+0x91/0xf0 [ 30.210545] print_report+0xcc/0x620 [ 30.210859] ? __virt_addr_valid+0x102/0x340 [ 30.211209] ? vma_interval_tree_remove+0xc75/0xec0 [ 30.211598] ? vma_interval_tree_remove+0xc75/0xec0 [ 30.211982] kasan_report+0xbe/0xf0 [ 30.212280] ? vma_interval_tree_remove+0xc75/0xec0 [ 30.212667] vma_interval_tree_remove+0xc75/0xec0 [ 30.213048] vma_prepare+0xc54/0x11a0 [ 30.213350] __split_vma+0x5af/0x950 [ 30.213649] ? __pfx___split_vma+0x10/0x10 [ 30.213979] ? find_held_lock+0x2c/0x110 [ 30.214305] do_vmi_align_munmap+0x2ba/0x11f0 [ 30.214667] ? lock_is_held_type+0x9f/0x120 [ 30.215005] ? __pfx_do_vmi_align_munmap+0x10/0x10 [ 30.215386] ? mtree_range_walk+0x632/0x900 [ 30.215733] ? mas_walk+0x5c7/0x7c0 [ 30.216032] do_vmi_munmap+0x1f1/0x2b0 [ 30.216350] mmap_region+0x1f9/0x2660 [ 30.216641] ? vm_mmap_pgoff+0x15c/0x3a0 [ 30.216964] ? __pfx_arch_get_unmapped_area_topdown+0x10/0x10 [ 30.217413] ? __pfx_lock_acquire+0x10/0x10 [ 30.217746] ? __pfx_mmap_region+0x10/0x10 [ 30.218077] ? security_mmap_addr+0x7d/0xa0 [ 30.218408] ? get_unmapped_area+0x1f5/0x3f0 [ 30.218782] do_mmap+0x854/0xf00 [ 30.219059] vm_mmap_pgoff+0x1a6/0x3a0 [ 30.219369] ? __pfx_vm_mmap_pgoff+0x10/0x10 [ 30.219721] ksys_mmap_pgoff+0x3af/0x500 [ 30.220038] do_syscall_64+0x3f/0x90 [ 30.220343] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 30.220748] RIP: 0033:0x7f041f8a8d82 [ 30.221034] 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 [ 30.222347] RSP: 002b:00007fff52d4c838 EFLAGS: 00000206 ORIG_RAX: 0000000000000009 [ 30.222962] RAX: ffffffffffffffda RBX: 0000000000000812 RCX: 00007f041f8a8d82 [ 30.223487] RDX: 0000000000000005 RSI: 0000000000001000 RDI: 00007f041ece2000 [ 30.224015] RBP: 00007f041ece2000 R08: 0000000000000009 R09: 0000000000001000 [ 30.224544] R10: 0000000000000812 R11: 0000000000000206 R12: 000055de3021bec0 [ 30.225073] R13: 00007fff52d4c850 R14: 00007fff52d4c880 R15: 00007fff52d4cbe0 [ 30.225608] </TASK> [ 30.225794] [ 30.225931] Allocated by task 213: [ 30.226208] kasan_save_stack+0x22/0x50 [ 30.226533] kasan_set_track+0x25/0x30 [ 30.226824] __kasan_slab_alloc+0x59/0x70 [ 30.227148] kmem_cache_alloc+0x16b/0x370 [ 30.227469] vm_area_dup+0x20/0x160 [ 30.227756] __split_vma+0x170/0x950 [ 30.228050] split_vma+0xc6/0x110 [ 30.228327] mprotect_fixup+0x8d2/0xb30 [ 30.228642] do_mprotect_pkey+0x87e/0xd40 [ 30.228963] __x64_sys_mprotect+0x78/0xc0 [ 30.229294] do_syscall_64+0x3f/0x90 [ 30.229599] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 30.229996] [ 30.230133] Freed by task 210: [ 30.230380] kasan_save_stack+0x22/0x50 [ 30.230717] kasan_set_track+0x25/0x30 [ 30.231028] kasan_save_free_info+0x2b/0x50 [ 30.231360] __kasan_slab_free+0x10a/0x190 [ 30.231683] kmem_cache_free+0x10d/0x4d0 [ 30.231989] rcu_core+0x8c8/0x2860 [ 30.232253] __do_softirq+0x1b7/0x7d4 [ 30.232550] [ 30.232687] Last potentially related work creation: [ 30.233045] kasan_save_stack+0x22/0x50 [ 30.233350] __kasan_record_aux_stack+0x8e/0xa0 [ 30.233689] __call_rcu_common.constprop.0+0x6a/0xb90 [ 30.234074] remove_vma+0x139/0x170 [ 30.234346] do_vmi_align_munmap+0xd4a/0x11f0 [ 30.234695] do_vmi_munmap+0x1f1/0x2b0 [ 30.234993] __vm_munmap+0x138/0x3a0 [ 30.235294] __x64_sys_munmap+0x59/0x80 [ 30.235600] do_syscall_64+0x3f/0x90 [ 30.235896] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 30.236287] [ 30.236420] The buggy address belongs to the object at ffff888009d75cb0 [ 30.236420] which belongs to the cache vm_area_struct of size 168 [ 30.237283] The buggy address is located 88 bytes inside of [ 30.237283] freed 168-byte region [ffff888009d75cb0, ffff888009d75d58) [ 30.238136] [ 30.238274] The buggy address belongs to the physical page: [ 30.238690] page:000000001bf38c5d refcount:1 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0x9d75 [ 30.239367] memcg:ffff88800cfcbe01 [ 30.239635] flags: 0x100000000000200(slab|node=0|zone=1) [ 30.240040] page_type: 0xffffffff() [ 30.240324] raw: 0100000000000200 ffff8880087a0c80 dead000000000122 0000000000000000 [ 30.240892] raw: 0000000000000000 0000000000110011 00000001ffffffff ffff88800cfcbe01 [ 30.241453] page dumped because: kasan: bad access detected [ 30.241866] [ 30.242002] Memory state around the buggy address: [ 30.242367] ffff888009d75c00: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 fc fc [ 30.242944] ffff888009d75c80: fc fc fc fc fc fc fa fb fb fb fb fb fb fb fb fb [ 30.243500] >ffff888009d75d00: fb fb fb fb fb fb fb fb fb fb fb fc fc fc fc fc [ 30.244055] ^ [ 30.244349] ffff888009d75d80: fc fc fc fa fb fb fb fb fb fb fb fb fb fb fb fb [ 30.244901] ffff888009d75e00: fb fb fb fb fb fb fb fb fc fc fc fc fc fc fc fc [ 30.245451] ================================================================== [ 30.246422] Disabling lock debugging due to kernel taint [ 32.601490] BUG: Bad rss-counter state mm:00000000c0295889 type:MM_FILEPAGES val:33 [ 32.602152] BUG: Bad rss-counter state mm:00000000c0295889 type:MM_ANONPAGES val:22 [ 33.352490] BUG: Bad rss-counter state mm:00000000c2e8ffc3 type:MM_FILEPAGES val:33 [ 33.353213] BUG: Bad rss-counter state mm:00000000c2e8ffc3 type:MM_ANONPAGES val:22 Warning: Permanently added '[localhost]:34899' (ECDSA) to the list of known hosts. 2023/06/21 10:03:42 fuzzer started 2023/06/21 10:03:42 dialing manager at localhost:36067 2023/06/21 10:03:43 checking machine... 2023/06/21 10:03:43 checking revisions... 2023/06/21 10:03:43 testing simple program... [ 34.290578] kmemleak: Automatic memory scanning thread ended [ 34.356858] cgroup: Unknown subsys name 'net' [ 34.394603] cgroup: Unknown subsys name 'rlimit' executing program executing program executing program VM DIAGNOSIS: 10:03:42 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=0000000000000001 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=00007f85221b1328 CR3=0000000005482000 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=652022746f6f72223d74636361207469 XMM02=3d6c616e696d72657420322e322e302e XMM03=3d656d616e74736f682022646873732f XMM04=40404040404040404040404040404040 XMM05=5a5a5a5a5a5a5a5a5a5a5a5a5a5a5a5a XMM06=20202020202020202020202020202020 XMM07=00000000000000000000000000000000 XMM08=652075253d64692073253d706f000000 XMM09=00000000000000000000000000000000 XMM10=00000000000000000000000000000000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000 info registers vcpu 1 RAX=ffff888015f2c9f8 RBX=0000000000000000 RCX=0000000000000000 RDX=0000000000000068 RSI=ffff888016ab3530 RDI=ffff888015f2caa0 RBP=ffff888016ab3488 RSP=ffff88800f267978 R8 =0000000000000000 R9 =fffffbfff0ba7a6a R10=ffffffff85d3d357 R11=00000000000b6a61 R12=ffff888015f2c9f8 R13=dffffc0000000000 R14=0000000000000075 R15=0000000000000000 RIP=ffffffff845130f8 RFL=00000202 [-------] 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 00007fe25ba8e900 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=00007fe25ba8e6f8 CR3=000000000e210000 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=ffffffffffff00000000000000000000 XMM02=ffffffffffff00000000000000000000 XMM03=00000000000000000000000000000000 XMM04=00000000000000000000000000000000 XMM05=00000000000000000000000000000000 XMM06=00000000000000000000000000000000 XMM07=00000000000000000000000000000000 XMM08=00000000000073707574726174732064 XMM09=00000000000000000000000000000000 XMM10=00000000000000000000000000000000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000