syzkaller login: [ 38.749561] BUG: Bad rss-counter state mm:000000001109c161 type:MM_FILEPAGES val:33 [ 38.750793] BUG: Bad rss-counter state mm:000000001109c161 type:MM_ANONPAGES val:22 [ 38.790023] ================================================================== [ 38.791166] BUG: KASAN: slab-use-after-free in vma_interval_tree_remove+0xc75/0xec0 [ 38.792414] Read of size 8 at addr ffff888019e65798 by task sshd/220 [ 38.793371] [ 38.793629] CPU: 0 PID: 220 Comm: sshd Not tainted 6.4.0-rc7-next-20230620 #1 [ 38.794681] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS 1.12.0-1 04/01/2014 [ 38.795892] Call Trace: [ 38.796284] [ 38.796632] dump_stack_lvl+0x91/0xf0 [ 38.797234] print_report+0xcc/0x620 [ 38.797818] ? __virt_addr_valid+0x102/0x340 [ 38.798498] ? vma_interval_tree_remove+0xc75/0xec0 [ 38.799243] ? vma_interval_tree_remove+0xc75/0xec0 [ 38.800003] kasan_report+0xbe/0xf0 [ 38.800574] ? vma_interval_tree_remove+0xc75/0xec0 [ 38.801344] vma_interval_tree_remove+0xc75/0xec0 [ 38.802084] vma_prepare+0xc54/0x11a0 [ 38.802675] __split_vma+0x5af/0x950 [ 38.803257] ? __pfx___split_vma+0x10/0x10 [ 38.803890] ? find_held_lock+0x2c/0x110 [ 38.804517] do_vmi_align_munmap+0x2ba/0x11f0 [ 38.805224] ? lock_is_held_type+0x9f/0x120 [ 38.805879] ? __pfx_do_vmi_align_munmap+0x10/0x10 [ 38.806617] ? mtree_range_walk+0x632/0x900 [ 38.807299] ? mas_walk+0x5c7/0x7c0 [ 38.807878] do_vmi_munmap+0x1f1/0x2b0 [ 38.808485] mmap_region+0x1f9/0x2660 [ 38.809072] ? vm_mmap_pgoff+0x15c/0x3a0 [ 38.809691] ? __pfx_arch_get_unmapped_area_topdown+0x10/0x10 [ 38.810574] ? __pfx_lock_acquire+0x10/0x10 [ 38.811236] ? __pfx_mmap_region+0x10/0x10 [ 38.811881] ? security_mmap_addr+0x7d/0xa0 [ 38.812448] ? get_unmapped_area+0x1f5/0x3f0 [ 38.813142] do_mmap+0x854/0xf00 [ 38.813560] vm_mmap_pgoff+0x1a6/0x3a0 [ 38.814026] ? __pfx_vm_mmap_pgoff+0x10/0x10 [ 38.814559] ksys_mmap_pgoff+0x3af/0x500 [ 38.815038] do_syscall_64+0x3f/0x90 [ 38.815494] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 38.816107] RIP: 0033:0x7fac0c976d82 [ 38.816536] 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 [ 38.818552] RSP: 002b:00007ffc2d91d7b8 EFLAGS: 00000206 ORIG_RAX: 0000000000000009 [ 38.819401] RAX: ffffffffffffffda RBX: 0000000000000812 RCX: 00007fac0c976d82 [ 38.820200] RDX: 0000000000000005 RSI: 0000000000001000 RDI: 00007fac0bdb0000 [ 38.821038] RBP: 00007fac0bdb0000 R08: 0000000000000009 R09: 0000000000001000 [ 38.821833] R10: 0000000000000812 R11: 0000000000000206 R12: 000055e84ef7ad90 [ 38.822672] R13: 00007ffc2d91d7d0 R14: 00007ffc2d91d800 R15: 00007ffc2d91db60 [ 38.823543] [ 38.823832] [ 38.824048] Allocated by task 213: [ 38.824475] kasan_save_stack+0x22/0x50 [ 38.824995] kasan_set_track+0x25/0x30 [ 38.825485] __kasan_slab_alloc+0x59/0x70 [ 38.826011] kmem_cache_alloc+0x16b/0x370 [ 38.826521] vm_area_dup+0x20/0x160 [ 38.826981] __split_vma+0x170/0x950 [ 38.827476] split_vma+0xc6/0x110 [ 38.827909] mprotect_fixup+0x8d2/0xb30 [ 38.828409] do_mprotect_pkey+0x87e/0xd40 [ 38.828951] __x64_sys_mprotect+0x78/0xc0 [ 38.829573] do_syscall_64+0x3f/0x90 [ 38.830053] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 38.830678] [ 38.830890] Freed by task 213: [ 38.831276] kasan_save_stack+0x22/0x50 [ 38.831777] kasan_set_track+0x25/0x30 [ 38.832260] kasan_save_free_info+0x2b/0x50 [ 38.832790] __kasan_slab_free+0x10a/0x190 [ 38.833338] kmem_cache_free+0x10d/0x4d0 [ 38.833837] rcu_core+0x8c8/0x2860 [ 38.834278] __do_softirq+0x1b7/0x7d4 [ 38.834751] [ 38.834969] Last potentially related work creation: [ 38.835559] kasan_save_stack+0x22/0x50 [ 38.836069] __kasan_record_aux_stack+0x8e/0xa0 [ 38.836637] __call_rcu_common.constprop.0+0x6a/0xb90 [ 38.837286] remove_vma+0x139/0x170 [ 38.837737] do_vmi_align_munmap+0xd4a/0x11f0 [ 38.838294] do_vmi_munmap+0x1f1/0x2b0 [ 38.838780] __vm_munmap+0x138/0x3a0 [ 38.839243] __x64_sys_munmap+0x59/0x80 [ 38.839730] do_syscall_64+0x3f/0x90 [ 38.840205] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 38.840856] [ 38.841078] The buggy address belongs to the object at ffff888019e65740 [ 38.841078] which belongs to the cache vm_area_struct of size 168 [ 38.842536] The buggy address is located 88 bytes inside of [ 38.842536] freed 168-byte region [ffff888019e65740, ffff888019e657e8) [ 38.843919] [ 38.844134] The buggy address belongs to the physical page: [ 38.844791] page:00000000e73c730b refcount:1 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0x19e65 [ 38.845860] memcg:ffff88801a094801 [ 38.846285] flags: 0x100000000000200(slab|node=0|zone=1) [ 38.846918] page_type: 0xffffffff() [ 38.847374] raw: 0100000000000200 ffff8880087a0c80 dead000000000122 0000000000000000 [ 38.848280] raw: 0000000000000000 0000000000110011 00000001ffffffff ffff88801a094801 [ 38.849203] page dumped because: kasan: bad access detected [ 38.849857] [ 38.850074] Memory state around the buggy address: [ 38.850656] ffff888019e65680: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 [ 38.851514] ffff888019e65700: fc fc fc fc fc fc fc fc fa fb fb fb fb fb fb fb [ 38.852358] >ffff888019e65780: fb fb fb fb fb fb fb fb fb fb fb fb fb fc fc fc [ 38.853212] ^ [ 38.853699] ffff888019e65800: fc fc fc fc fc fa fb fb fb fb fb fb fb fb fb fb [ 38.854541] ffff888019e65880: fb fb fb fb fb fb fb fb fb fb fc fc fc fc fc fc [ 38.855384] ================================================================== [ 38.856507] Disabling lock debugging due to kernel taint [ 41.488517] BUG: Bad rss-counter state mm:000000002efc94aa type:MM_FILEPAGES val:33 [ 41.489311] BUG: Bad rss-counter state mm:000000002efc94aa type:MM_ANONPAGES val:22 [ 41.936224] BUG: Bad rss-counter state mm:000000009b3b805e type:MM_FILEPAGES val:33 [ 41.937021] BUG: Bad rss-counter state mm:000000009b3b805e type:MM_ANONPAGES val:22 Warning: Permanently added '[localhost]:45375' (ECDSA) to the list of known hosts. 2023/06/21 03:35:30 fuzzer started 2023/06/21 03:35:31 dialing manager at localhost:36067 2023/06/21 03:35:31 checking machine... 2023/06/21 03:35:31 checking revisions... [ 42.675846] kmemleak: Automatic memory scanning thread ended 2023/06/21 03:35:31 testing simple program... [ 42.726412] cgroup: Unknown subsys name 'net' [ 42.767392] cgroup: Unknown subsys name 'rlimit' executing program executing program executing program VM DIAGNOSIS: 03:35:30 Registers: info registers vcpu 0 RAX=0000000000000000 RBX=ffff888016233bc8 RCX=0000000000000000 RDX=ffff888015e0d1c0 RSI=ffffffff8196bfc8 RDI=0000000000000001 RBP=0000000000000001 RSP=ffff8880145cfa20 R8 =0000000000000001 R9 =0000000000000000 R10=0000000000000001 R11=0000000000000000 R12=0000000000000000 R13=dffffc0000000000 R14=0000000000000001 R15=0000000000000000 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 =0000 0000000000000000 00000000 00000000 DS =0000 0000000000000000 00000000 00000000 FS =0000 00007f7428eb2900 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=00007f742831f220 CR3=000000000d6c0000 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=454d49544c4145525f454352554f535f XMM01=3d504d415453454d49545f454d49544c XMM02=ffffffffffffffffffffffffffffffff XMM03=2f6c616e72756f6a2f676f6c2f6e7572 XMM04=d9c91349d472ba7400000000000ae988 XMM05=621ce3d276d0b9ed0000000000133388 XMM06=8cd08595eb52380e0000000000131db8 XMM07=00000000000000000000000000000000 XMM08=415453454d49545f454d49544c414552 XMM09=00000000000000000000000000000000 XMM10=20200000000020202020202020200000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000 info registers vcpu 1 RAX=0000000000000001 RBX=0000000000000001 RCX=0000000000000000 RDX=ffff88801a2d8000 RSI=ffffffff84e39980 RDI=0000000000000005 RBP=0000000000000002 RSP=ffff8880165cfce8 R8 =0000000000000005 R9 =0000000000000000 R10=0000000000000002 R11=0000000000000000 R12=0000000000000004 R13=ffff8880180c6f40 R14=00007f07469db000 R15=00007f0746a05fff RIP=ffffffff844a4e31 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 =0000 0000000000000000 00000000 00000000 DS =0000 0000000000000000 00000000 00000000 FS =0000 00007f0746640900 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=00007f07469dc3ec CR3=000000000e7c8000 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=6720646572637465733a4d41503d706f 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