syzkaller login: [ 52.385784] BUG: Bad rss-counter state mm:00000000f6fc2af8 type:MM_FILEPAGES val:33 [ 52.386961] BUG: Bad rss-counter state mm:00000000f6fc2af8 type:MM_ANONPAGES val:22 [ 52.421860] ================================================================== [ 52.422837] BUG: KASAN: slab-use-after-free in vma_interval_tree_remove+0xc75/0xec0 [ 52.423845] Read of size 8 at addr ffff88800f622798 by task sshd/219 [ 52.424765] [ 52.425033] CPU: 1 PID: 219 Comm: sshd Not tainted 6.4.0-rc7-next-20230619 #1 [ 52.425903] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS 1.12.0-1 04/01/2014 [ 52.426909] Call Trace: [ 52.427227] [ 52.427519] dump_stack_lvl+0x91/0xf0 [ 52.428009] print_report+0xcc/0x620 [ 52.428523] ? __virt_addr_valid+0x102/0x340 [ 52.429090] ? vma_interval_tree_remove+0xc75/0xec0 [ 52.429711] ? vma_interval_tree_remove+0xc75/0xec0 [ 52.430348] kasan_report+0xbe/0xf0 [ 52.430833] ? vma_interval_tree_remove+0xc75/0xec0 [ 52.431455] vma_interval_tree_remove+0xc75/0xec0 [ 52.432061] vma_prepare+0xc54/0x11a0 [ 52.432552] __split_vma+0x5af/0x950 [ 52.433025] ? __pfx___split_vma+0x10/0x10 [ 52.433695] ? find_held_lock+0x2c/0x110 [ 52.434221] do_vmi_align_munmap+0x2ba/0x11f0 [ 52.434789] ? lock_is_held_type+0x9f/0x120 [ 52.435333] ? __pfx_do_vmi_align_munmap+0x10/0x10 [ 52.435957] ? mtree_range_walk+0x632/0x900 [ 52.436531] ? mas_walk+0x5c7/0x7c0 [ 52.437004] do_vmi_munmap+0x1f1/0x2b0 [ 52.437497] mmap_region+0x1f9/0x2660 [ 52.437978] ? vm_mmap_pgoff+0x15c/0x3a0 [ 52.438498] ? __pfx_arch_get_unmapped_area_topdown+0x10/0x10 [ 52.439212] ? __pfx_lock_acquire+0x10/0x10 [ 52.439743] ? __pfx_mmap_region+0x10/0x10 [ 52.440296] ? security_mmap_addr+0x7d/0xa0 [ 52.440825] ? get_unmapped_area+0x1f5/0x3f0 [ 52.441376] do_mmap+0x854/0xf00 [ 52.441815] vm_mmap_pgoff+0x1a6/0x3a0 [ 52.442315] ? __pfx_vm_mmap_pgoff+0x10/0x10 [ 52.442883] ksys_mmap_pgoff+0x3af/0x500 [ 52.443384] do_syscall_64+0x3f/0x90 [ 52.443860] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 52.444509] RIP: 0033:0x7f032356ed82 [ 52.444962] 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 [ 52.447076] RSP: 002b:00007ffddaf2f698 EFLAGS: 00000206 ORIG_RAX: 0000000000000009 [ 52.447978] RAX: ffffffffffffffda RBX: 0000000000000812 RCX: 00007f032356ed82 [ 52.448838] RDX: 0000000000000005 RSI: 0000000000001000 RDI: 00007f03229a8000 [ 52.449721] RBP: 00007f03229a8000 R08: 0000000000000009 R09: 0000000000001000 [ 52.450575] R10: 0000000000000812 R11: 0000000000000206 R12: 0000564e5d753d90 [ 52.451433] R13: 00007ffddaf2f6b0 R14: 00007ffddaf2f6e0 R15: 00007ffddaf2fa40 [ 52.452313] [ 52.452618] [ 52.452839] Allocated by task 212: [ 52.453274] kasan_save_stack+0x22/0x50 [ 52.453782] kasan_set_track+0x25/0x30 [ 52.454282] __kasan_slab_alloc+0x59/0x70 [ 52.454818] kmem_cache_alloc+0x16b/0x370 [ 52.455345] vm_area_dup+0x20/0x160 [ 52.455817] __split_vma+0x170/0x950 [ 52.456299] split_vma+0xc6/0x110 [ 52.456740] mprotect_fixup+0x8d2/0xb30 [ 52.457239] do_mprotect_pkey+0x87e/0xd40 [ 52.457756] __x64_sys_mprotect+0x78/0xc0 [ 52.458275] do_syscall_64+0x3f/0x90 [ 52.458744] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 52.459388] [ 52.459602] Freed by task 212: [ 52.459998] kasan_save_stack+0x22/0x50 [ 52.460510] kasan_set_track+0x25/0x30 [ 52.461013] kasan_save_free_info+0x2b/0x50 [ 52.461541] __kasan_slab_free+0x10a/0x190 [ 52.462070] kmem_cache_free+0x10d/0x4d0 [ 52.462573] rcu_core+0x8c8/0x2860 [ 52.463018] __do_softirq+0x1b7/0x7d4 [ 52.463511] [ 52.463724] Last potentially related work creation: [ 52.464317] kasan_save_stack+0x22/0x50 [ 52.464820] __kasan_record_aux_stack+0x8e/0xa0 [ 52.465396] __call_rcu_common.constprop.0+0x6a/0xb90 [ 52.466047] remove_vma+0x139/0x170 [ 52.466501] do_vmi_align_munmap+0xd4a/0x11f0 [ 52.467054] do_vmi_munmap+0x1f1/0x2b0 [ 52.467538] __vm_munmap+0x138/0x3a0 [ 52.468005] __x64_sys_munmap+0x59/0x80 [ 52.468510] do_syscall_64+0x3f/0x90 [ 52.468982] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 52.469623] [ 52.469837] The buggy address belongs to the object at ffff88800f622740 [ 52.469837] which belongs to the cache vm_area_struct of size 168 [ 52.471300] The buggy address is located 88 bytes inside of [ 52.471300] freed 168-byte region [ffff88800f622740, ffff88800f6227e8) [ 52.472715] [ 52.472928] The buggy address belongs to the physical page: [ 52.473588] page:00000000e872d2a0 refcount:1 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0xf622 [ 52.474682] memcg:ffff888017efc301 [ 52.475106] flags: 0x100000000000200(slab|node=0|zone=1) [ 52.475759] page_type: 0xffffffff() [ 52.476216] raw: 0100000000000200 ffff88800879fc80 dead000000000122 0000000000000000 [ 52.477128] raw: 0000000000000000 0000000000110011 00000001ffffffff ffff888017efc301 [ 52.478025] page dumped because: kasan: bad access detected [ 52.478692] [ 52.478910] Memory state around the buggy address: [ 52.479489] ffff88800f622680: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 [ 52.480367] ffff88800f622700: fc fc fc fc fc fc fc fc fa fb fb fb fb fb fb fb [ 52.481227] >ffff88800f622780: fb fb fb fb fb fb fb fb fb fb fb fb fb fc fc fc [ 52.482069] ^ [ 52.482558] ffff88800f622800: fc fc fc fc fc fa fb fb fb fb fb fb fb fb fb fb [ 52.483412] ffff88800f622880: fb fb fb fb fb fb fb fb fb fb fc fc fc fc fc fc [ 52.484273] ================================================================== [ 52.485526] Disabling lock debugging due to kernel taint [ 54.832286] BUG: Bad rss-counter state mm:00000000d21d8d37 type:MM_FILEPAGES val:33 [ 54.833296] BUG: Bad rss-counter state mm:00000000d21d8d37 type:MM_ANONPAGES val:22 [ 55.312023] BUG: Bad rss-counter state mm:00000000375770c1 type:MM_FILEPAGES val:33 [ 55.313048] BUG: Bad rss-counter state mm:00000000375770c1 type:MM_ANONPAGES val:22 Warning: Permanently added '[localhost]:33607' (ECDSA) to the list of known hosts. 2023/06/19 19:05:12 fuzzer started 2023/06/19 19:05:12 dialing manager at localhost:44161 2023/06/19 19:05:12 checking machine... 2023/06/19 19:05:12 checking revisions... [ 56.017912] kmemleak: Automatic memory scanning thread ended 2023/06/19 19:05:13 testing simple program... [ 56.059917] cgroup: Unknown subsys name 'net' [ 56.106381] cgroup: Unknown subsys name 'rlimit' executing program executing program executing program VM DIAGNOSIS: 19:04:51 Registers: info registers vcpu 0 RAX=dffffc0000000000 RBX=0000000000000001 RCX=ffffffff863b6670 RDX=1ffff11002fe9eb8 RSI=1ffff11002fe9eb7 RDI=1ffff11002fe9eb7 RBP=ffff888017f4f5b8 RSP=ffff888017f4f4f0 R8 =ffffffff863b6674 R9 =ffff888017f4f5a0 R10=0000000000038001 R11=000000000008b5c6 R12=ffff888017f4f5c0 R13=ffff888017f4f5a8 R14=ffff888017f4f940 R15=ffff888017f4f560 RIP=ffffffff811310d4 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 =0018 0000000000000000 ffffffff 00c09300 DPL=0 DS [-WA] DS =0000 0000000000000000 00000000 00000000 FS =0000 00007f713df61900 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=00007fff8f55b000 CR3=000000000f384000 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=635f6e6f69737365733a4d41503d706f XMM01=6f6c5f6d61702c78756e696c65735f6d XMM02=61702c74696d7265705f6d61702c7469 XMM03=655f6d61702c7374696d696c5f6d6170 XMM04=3d6c616e696d72657420322e322e302e XMM05=3d656d616e74736f682022646873732f XMM06=746f6f72223d746363612078756e696c XMM07=6e655f6d61702c7374696d696c5f6d61 XMM08=652075253d64692073253d706f000000 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=0000000000000001 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=00007f62ac63af60 CR3=000000000e170000 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=2032313a35303a3931203931206e754a XMM01=73732878696e755f6d6170203a5d3832 XMM02=65736f6c63206e6f6973736573203a29 XMM03=755f6d6170203a5d3832325b64687373 XMM04=69662068637573206f4e203a656c6163 XMM05=3a656c696620766e65206e65706f206f XMM06=65733a6468737328766e655f6d617020 XMM07=6b7a79732032313a35303a3931203931 XMM08=3d656e696c646d632022656369767265 XMM09=00000000000000000000000000000000 XMM10=00000000000000000000000000000000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000