syzkaller login: [ 30.860349] BUG: Bad rss-counter state mm:00000000fa7dd1cf type:MM_FILEPAGES val:33 [ 30.861765] BUG: Bad rss-counter state mm:00000000fa7dd1cf type:MM_ANONPAGES val:22 [ 31.027510] ================================================================== [ 31.028488] BUG: KASAN: slab-use-after-free in vma_interval_tree_remove+0xc75/0xec0 [ 31.029431] Read of size 8 at addr ffff888016b2aed8 by task sshd/220 [ 31.030306] [ 31.030529] CPU: 0 PID: 220 Comm: sshd Not tainted 6.4.0-rc7-next-20230620 #1 [ 31.031407] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS 1.12.0-1 04/01/2014 [ 31.032385] Call Trace: [ 31.032708] [ 31.032991] dump_stack_lvl+0x91/0xf0 [ 31.033487] print_report+0xcc/0x620 [ 31.033978] ? __virt_addr_valid+0x102/0x340 [ 31.034535] ? vma_interval_tree_remove+0xc75/0xec0 [ 31.035175] ? vma_interval_tree_remove+0xc75/0xec0 [ 31.035804] kasan_report+0xbe/0xf0 [ 31.036278] ? vma_interval_tree_remove+0xc75/0xec0 [ 31.036907] vma_interval_tree_remove+0xc75/0xec0 [ 31.037500] vma_prepare+0xc54/0x11a0 [ 31.037977] __split_vma+0x5af/0x950 [ 31.038450] ? __pfx___split_vma+0x10/0x10 [ 31.038989] ? find_held_lock+0x2c/0x110 [ 31.039504] do_vmi_align_munmap+0x2ba/0x11f0 [ 31.040072] ? lock_is_held_type+0x9f/0x120 [ 31.040605] ? __pfx_do_vmi_align_munmap+0x10/0x10 [ 31.041209] ? mtree_range_walk+0x632/0x900 [ 31.041757] ? mas_walk+0x5c7/0x7c0 [ 31.042230] do_vmi_munmap+0x1f1/0x2b0 [ 31.042720] mmap_region+0x1f9/0x2660 [ 31.043204] ? vm_mmap_pgoff+0x15c/0x3a0 [ 31.043714] ? __pfx_arch_get_unmapped_area_topdown+0x10/0x10 [ 31.044424] ? __pfx_lock_acquire+0x10/0x10 [ 31.044959] ? __pfx_mmap_region+0x10/0x10 [ 31.045492] ? security_mmap_addr+0x7d/0xa0 [ 31.046028] ? get_unmapped_area+0x1f5/0x3f0 [ 31.046580] do_mmap+0x854/0xf00 [ 31.047035] vm_mmap_pgoff+0x1a6/0x3a0 [ 31.047532] ? __pfx_vm_mmap_pgoff+0x10/0x10 [ 31.048098] ksys_mmap_pgoff+0x3af/0x500 [ 31.048610] do_syscall_64+0x3f/0x90 [ 31.049086] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 31.049732] RIP: 0033:0x7fef14ebed82 [ 31.050203] 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 [ 31.052328] RSP: 002b:00007fffca1aae48 EFLAGS: 00000206 ORIG_RAX: 0000000000000009 [ 31.053234] RAX: ffffffffffffffda RBX: 0000000000000812 RCX: 00007fef14ebed82 [ 31.054087] RDX: 0000000000000005 RSI: 0000000000001000 RDI: 00007fef142f8000 [ 31.054934] RBP: 00007fef142f8000 R08: 0000000000000009 R09: 0000000000001000 [ 31.055807] R10: 0000000000000812 R11: 0000000000000206 R12: 0000556de9b5eec0 [ 31.056648] R13: 00007fffca1aae60 R14: 00007fffca1aae90 R15: 00007fffca1ab1f0 [ 31.057491] [ 31.057784] [ 31.058000] Allocated by task 213: [ 31.058423] kasan_save_stack+0x22/0x50 [ 31.058923] kasan_set_track+0x25/0x30 [ 31.059420] __kasan_slab_alloc+0x59/0x70 [ 31.059939] kmem_cache_alloc+0x16b/0x370 [ 31.060446] vm_area_dup+0x20/0x160 [ 31.060900] __split_vma+0x170/0x950 [ 31.061359] split_vma+0xc6/0x110 [ 31.061792] mprotect_fixup+0x8d2/0xb30 [ 31.062286] do_mprotect_pkey+0x87e/0xd40 [ 31.062805] __x64_sys_mprotect+0x78/0xc0 [ 31.063331] do_syscall_64+0x3f/0x90 [ 31.063803] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 31.064440] [ 31.064655] Freed by task 213: [ 31.065046] kasan_save_stack+0x22/0x50 [ 31.065539] kasan_set_track+0x25/0x30 [ 31.066027] kasan_save_free_info+0x2b/0x50 [ 31.066556] __kasan_slab_free+0x10a/0x190 [ 31.067098] kmem_cache_free+0x10d/0x4d0 [ 31.067602] rcu_core+0x8c8/0x2860 [ 31.068047] __do_softirq+0x1b7/0x7d4 [ 31.068519] [ 31.068736] Last potentially related work creation: [ 31.069318] kasan_save_stack+0x22/0x50 [ 31.069818] __kasan_record_aux_stack+0x8e/0xa0 [ 31.070383] __call_rcu_common.constprop.0+0x6a/0xb90 [ 31.071033] remove_vma+0x139/0x170 [ 31.071478] do_vmi_align_munmap+0xd4a/0x11f0 [ 31.072029] do_vmi_munmap+0x1f1/0x2b0 [ 31.072507] __vm_munmap+0x138/0x3a0 [ 31.072971] __x64_sys_munmap+0x59/0x80 [ 31.073463] do_syscall_64+0x3f/0x90 [ 31.073934] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 31.074566] [ 31.074779] The buggy address belongs to the object at ffff888016b2ae80 [ 31.074779] which belongs to the cache vm_area_struct of size 168 [ 31.076259] The buggy address is located 88 bytes inside of [ 31.076259] freed 168-byte region [ffff888016b2ae80, ffff888016b2af28) [ 31.077642] [ 31.077857] The buggy address belongs to the physical page: [ 31.078529] page:00000000249d310c refcount:1 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0x16b2a [ 31.079639] memcg:ffff88801a13ad01 [ 31.080062] flags: 0x100000000000200(slab|node=0|zone=1) [ 31.080700] page_type: 0xffffffff() [ 31.081148] raw: 0100000000000200 ffff8880087a0c80 dead000000000122 0000000000000000 [ 31.082052] raw: 0000000000000000 0000000000110011 00000001ffffffff ffff88801a13ad01 [ 31.082955] page dumped because: kasan: bad access detected [ 31.083610] [ 31.083824] Memory state around the buggy address: [ 31.084401] ffff888016b2ad80: fc fc fc 00 00 00 00 00 00 00 00 00 00 00 00 00 [ 31.085254] ffff888016b2ae00: 00 00 00 00 00 00 00 00 fc fc fc fc fc fc fc fc [ 31.086104] >ffff888016b2ae80: fa fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb [ 31.086960] ^ [ 31.087683] ffff888016b2af00: fb fb fb fb fb fc fc fc fc fc fc fc fc fc fc fc [ 31.088533] ffff888016b2af80: fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc [ 31.089380] ================================================================== [ 31.090383] Disabling lock debugging due to kernel taint [ 33.342950] BUG: Bad rss-counter state mm:00000000171bd26a type:MM_FILEPAGES val:33 [ 33.344175] BUG: Bad rss-counter state mm:00000000171bd26a type:MM_ANONPAGES val:22 [ 33.733706] BUG: Bad rss-counter state mm:00000000585bf8d1 type:MM_FILEPAGES val:33 [ 33.734957] BUG: Bad rss-counter state mm:00000000585bf8d1 type:MM_ANONPAGES val:22 Warning: Permanently added '[localhost]:47320' (ECDSA) to the list of known hosts. 2023/06/20 22:51:10 fuzzer started 2023/06/20 22:51:10 dialing manager at localhost:36067 2023/06/20 22:51:10 checking machine... 2023/06/20 22:51:10 checking revisions... [ 34.426870] kmemleak: Automatic memory scanning thread ended 2023/06/20 22:51:10 testing simple program... [ 34.475247] cgroup: Unknown subsys name 'net' [ 34.513898] cgroup: Unknown subsys name 'rlimit' executing program executing program executing program VM DIAGNOSIS: 22:51:10 Registers: info registers vcpu 0 RAX=ffff8880146d8001 RBX=ffff8880146d79e8 RCX=0000000000000001 RDX=ffff8880146d79f0 RSI=ffff8880146d79b8 RDI=ffff8880146d79f8 RBP=ffff8880146d0000 RSP=ffff8880146d7928 R8 =0000000000000001 R9 =ffff8880146d7a28 R10=0000000000038001 R11=0000000000006097 R12=ffff8880146d7a48 R13=ffff8880146d7a30 R14=ffff8880146d79b8 R15=ffff8880146d79e8 RIP=ffffffff81131cda 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 00007f3f8f8d8900 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=00007f3f8ed29380 CR3=000000000c624000 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=ffffffffffffffffffffffffffffffff XMM01=30306234386136303638616663356134 XMM02=38303062343861363036386166633561 XMM03=2f6c616e72756f6a2f676f6c2f6e7572 XMM04=8e3a7ddc58c0420f00000000000ae988 XMM05=0fbc5f5bffd7b8100000000000132840 XMM06=4fda316b135da52b0000000000131630 XMM07=00000000000000000000000000000000 XMM08=415453454d49545f454d49544c414552 XMM09=00000000000000000000000000000000 XMM10=20200000000020202020202020200000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000 info registers vcpu 1 RAX=fffffbfff0ba7a6a RBX=fffffbfff0ba7a6b RCX=ffffffff815343f6 RDX=fffffbfff0ba7a6b RSI=0000000000000008 RDI=ffffffff85d3d350 RBP=fffffbfff0ba7a6a RSP=ffff88801d1bf7f8 R8 =0000000000000000 R9 =fffffbfff0ba7a6a R10=ffffffff85d3d357 R11=0000000000000000 R12=0000000000000246 R13=ffff888018e11740 R14=ffff888018e11780 R15=ffff888018e11740 RIP=ffffffff8180f189 RFL=00000046 [---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 00007f20f6959900 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=00007ffe6a487000 CR3=000000000c558000 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