syzkaller login: [ 38.676189] BUG: Bad rss-counter state mm:00000000b34cfcaa type:MM_FILEPAGES val:33 [ 38.676996] BUG: Bad rss-counter state mm:00000000b34cfcaa type:MM_ANONPAGES val:22 [ 38.803892] ================================================================== [ 38.804923] BUG: KASAN: slab-use-after-free in vma_interval_tree_remove+0xc75/0xec0 [ 38.806099] Read of size 8 at addr ffff888019e99d08 by task sshd/219 [ 38.806908] [ 38.807138] CPU: 1 PID: 219 Comm: sshd Not tainted 6.4.0-rc7-next-20230620 #1 [ 38.808038] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS 1.12.0-1 04/01/2014 [ 38.809048] Call Trace: [ 38.809369] [ 38.809665] dump_stack_lvl+0x91/0xf0 [ 38.810162] print_report+0xcc/0x620 [ 38.810649] ? __virt_addr_valid+0x102/0x340 [ 38.811254] ? vma_interval_tree_remove+0xc75/0xec0 [ 38.811896] ? vma_interval_tree_remove+0xc75/0xec0 [ 38.812533] kasan_report+0xbe/0xf0 [ 38.813024] ? vma_interval_tree_remove+0xc75/0xec0 [ 38.813639] vma_interval_tree_remove+0xc75/0xec0 [ 38.814235] vma_prepare+0xc54/0x11a0 [ 38.814709] __split_vma+0x5af/0x950 [ 38.815189] ? __pfx___split_vma+0x10/0x10 [ 38.815720] ? find_held_lock+0x2c/0x110 [ 38.816240] do_vmi_align_munmap+0x2ba/0x11f0 [ 38.816806] ? lock_is_held_type+0x9f/0x120 [ 38.817345] ? __pfx_do_vmi_align_munmap+0x10/0x10 [ 38.817950] ? mtree_range_walk+0x632/0x900 [ 38.818504] ? mas_walk+0x5c7/0x7c0 [ 38.818990] do_vmi_munmap+0x1f1/0x2b0 [ 38.819485] mmap_region+0x1f9/0x2660 [ 38.819961] ? vm_mmap_pgoff+0x15c/0x3a0 [ 38.820472] ? __pfx_arch_get_unmapped_area_topdown+0x10/0x10 [ 38.821185] ? __pfx_lock_acquire+0x10/0x10 [ 38.821737] ? __pfx_mmap_region+0x10/0x10 [ 38.822267] ? security_mmap_addr+0x7d/0xa0 [ 38.822812] ? get_unmapped_area+0x1f5/0x3f0 [ 38.823378] do_mmap+0x854/0xf00 [ 38.823817] vm_mmap_pgoff+0x1a6/0x3a0 [ 38.824322] ? __pfx_vm_mmap_pgoff+0x10/0x10 [ 38.824887] ksys_mmap_pgoff+0x3af/0x500 [ 38.825403] do_syscall_64+0x3f/0x90 [ 38.825887] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 38.826544] RIP: 0033:0x7f99b6de3d82 [ 38.827018] 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 [ 38.829158] RSP: 002b:00007fffe2d4ecd8 EFLAGS: 00000206 ORIG_RAX: 0000000000000009 [ 38.830078] RAX: ffffffffffffffda RBX: 0000000000000812 RCX: 00007f99b6de3d82 [ 38.830955] RDX: 0000000000000005 RSI: 0000000000001000 RDI: 00007f99b621d000 [ 38.831816] RBP: 00007f99b621d000 R08: 0000000000000009 R09: 0000000000001000 [ 38.832675] R10: 0000000000000812 R11: 0000000000000206 R12: 00005601d0b21ec0 [ 38.833533] R13: 00007fffe2d4ecf0 R14: 00007fffe2d4ed20 R15: 00007fffe2d4f080 [ 38.834393] [ 38.834683] [ 38.834901] Allocated by task 212: [ 38.835356] kasan_save_stack+0x22/0x50 [ 38.835873] kasan_set_track+0x25/0x30 [ 38.836375] __kasan_slab_alloc+0x59/0x70 [ 38.836912] kmem_cache_alloc+0x16b/0x370 [ 38.837439] vm_area_dup+0x20/0x160 [ 38.837897] __split_vma+0x170/0x950 [ 38.838365] split_vma+0xc6/0x110 [ 38.838808] mprotect_fixup+0x8d2/0xb30 [ 38.839333] do_mprotect_pkey+0x87e/0xd40 [ 38.839860] __x64_sys_mprotect+0x78/0xc0 [ 38.840388] do_syscall_64+0x3f/0x90 [ 38.840867] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 38.841518] [ 38.841734] Freed by task 212: [ 38.842131] kasan_save_stack+0x22/0x50 [ 38.842631] kasan_set_track+0x25/0x30 [ 38.843160] kasan_save_free_info+0x2b/0x50 [ 38.843705] __kasan_slab_free+0x10a/0x190 [ 38.844260] kmem_cache_free+0x10d/0x4d0 [ 38.844786] rcu_core+0x8c8/0x2860 [ 38.845235] __do_softirq+0x1b7/0x7d4 [ 38.845735] [ 38.845955] Last potentially related work creation: [ 38.846558] kasan_save_stack+0x22/0x50 [ 38.847081] __kasan_record_aux_stack+0x8e/0xa0 [ 38.847670] __call_rcu_common.constprop.0+0x6a/0xb90 [ 38.848340] remove_vma+0x139/0x170 [ 38.848812] do_vmi_align_munmap+0xd4a/0x11f0 [ 38.849382] do_vmi_munmap+0x1f1/0x2b0 [ 38.849887] __vm_munmap+0x138/0x3a0 [ 38.850371] __x64_sys_munmap+0x59/0x80 [ 38.850879] do_syscall_64+0x3f/0x90 [ 38.851382] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 38.852048] [ 38.852268] The buggy address belongs to the object at ffff888019e99cb0 [ 38.852268] which belongs to the cache vm_area_struct of size 168 [ 38.853782] The buggy address is located 88 bytes inside of [ 38.853782] freed 168-byte region [ffff888019e99cb0, ffff888019e99d58) [ 38.855235] [ 38.855456] The buggy address belongs to the physical page: [ 38.856118] page:000000000bdd6dbe refcount:1 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0x19e99 [ 38.857212] memcg:ffff888018e36601 [ 38.857634] anon flags: 0x100000000000200(slab|node=0|zone=1) [ 38.858352] page_type: 0xffffffff() [ 38.858800] raw: 0100000000000200 ffff8880087a0c80 ffffea0000570400 dead000000000007 [ 38.859725] raw: 0000000000000000 0000000000110011 00000001ffffffff ffff888018e36601 [ 38.860632] page dumped because: kasan: bad access detected [ 38.861293] [ 38.861510] Memory state around the buggy address: [ 38.862086] ffff888019e99c00: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fc fc [ 38.862954] ffff888019e99c80: fc fc fc fc fc fc fa fb fb fb fb fb fb fb fb fb [ 38.863806] >ffff888019e99d00: fb fb fb fb fb fb fb fb fb fb fb fc fc fc fc fc [ 38.864655] ^ [ 38.865095] ffff888019e99d80: fc fc fc 00 00 00 00 00 00 00 00 00 00 00 00 00 [ 38.865946] ffff888019e99e00: 00 00 00 00 00 00 00 00 fc fc fc fc fc fc fc fc [ 38.866795] ================================================================== [ 38.868002] Disabling lock debugging due to kernel taint [ 40.825561] BUG: Bad rss-counter state mm:00000000e0e16c68 type:MM_FILEPAGES val:33 [ 40.826565] BUG: Bad rss-counter state mm:00000000e0e16c68 type:MM_ANONPAGES val:22 [ 41.283721] BUG: Bad rss-counter state mm:000000000330c952 type:MM_FILEPAGES val:33 [ 41.284661] BUG: Bad rss-counter state mm:000000000330c952 type:MM_ANONPAGES val:22 Warning: Permanently added '[localhost]:63263' (ECDSA) to the list of known hosts. 2023/06/21 03:20:55 fuzzer started 2023/06/21 03:20:55 dialing manager at localhost:36067 2023/06/21 03:20:55 checking machine... 2023/06/21 03:20:55 checking revisions... [ 41.959624] kmemleak: Automatic memory scanning thread ended 2023/06/21 03:20:55 testing simple program... [ 42.007504] cgroup: Unknown subsys name 'net' [ 42.050316] cgroup: Unknown subsys name 'rlimit' executing program executing program executing program VM DIAGNOSIS: 03:20:55 Registers: info registers vcpu 0 RAX=dffffc0000000000 RBX=ffff88800d93f558 RCX=0000000000000000 RDX=1ffff11001b27e9d RSI=0000000000000000 RDI=ffff88800d93f530 RBP=ffff888015c48000 RSP=ffff88800d93f470 R8 =0000000000000130 R9 =0000000000000000 R10=ffff88800d93f4c0 R11=0030733a745f6c65 R12=0000000000000000 R13=ffff88800d93f4e8 R14=ffff888015c48000 R15=ffff88800d93f4c0 RIP=ffffffff81132ac0 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 00007f9fcb559900 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=00007f9fca9d72a0 CR3=0000000009a62000 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=0aa240ebd504bcacbf4eb367c4a21026 XMM02=ec2efd57dc4c00df000000000011ac38 XMM03=596581c351253d40000000000011ad08 XMM04=0c042e92ba26898900000000000ae988 XMM05=ed9ba1570504c6500000000000132618 XMM06=dfcdbad4f1609c370000000000131140 XMM07=fb795ef6d65770560000000000121648 XMM08=2c67c8bc2e329bc3000000000011aca8 XMM09=00000000000000000000000000000000 XMM10=00000000000000000000000000000000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000 info registers vcpu 1 RAX=dffffc0000000000 RBX=ffff88800f1d7aa0 RCX=ffffffff86139701 RDX=1ffff11001e3af65 RSI=ffffffff8180ca5a RDI=ffff88800f1d7aac RBP=ffff88800f1d7b28 RSP=ffff88800f1d79b8 R8 =ffffffff86139748 R9 =ffff88800f1d7a18 R10=0000000000038001 R11=0000000000020f03 R12=ffff88800f1d7aa0 R13=0000000000000000 R14=ffff888015dd9b40 R15=ffff88800fdfa080 RIP=ffffffff813ad547 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 00007f9ade7fb900 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=00007ffce703f000 CR3=000000000db84000 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=00000000000000000000000000000000 XMM02=00000000000000000000000000000000 XMM03=e39e1eebe13144a40dbb44a5ed40f3bd XMM04=ae3dfc8326ce1726bdb3e5350432f664 XMM05=00000000000000000000000000000000 XMM06=ae3d1e83263117260db344350432f364 XMM07=672065736f6c635f6e6f69737365733a XMM08=652075253d64692073253d706f000000 XMM09=00000000000000000000000000000000 XMM10=00000000000000000000000000000000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000