syzkaller login: [ 30.484286] BUG: Bad rss-counter state mm:00000000492467e8 type:MM_FILEPAGES val:33 [ 30.485650] BUG: Bad rss-counter state mm:00000000492467e8 type:MM_ANONPAGES val:22 [ 30.654903] ================================================================== [ 30.655855] BUG: KASAN: slab-use-after-free in vma_interval_tree_remove+0xc75/0xec0 [ 30.656865] Read of size 8 at addr ffff88800e6875c8 by task sshd/219 [ 30.657732] [ 30.657956] CPU: 0 PID: 219 Comm: sshd Not tainted 6.4.0-rc7-next-20230619 #1 [ 30.658826] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS 1.12.0-1 04/01/2014 [ 30.659804] Call Trace: [ 30.660127] [ 30.660449] dump_stack_lvl+0x91/0xf0 [ 30.660953] print_report+0xcc/0x620 [ 30.661439] ? __virt_addr_valid+0x102/0x340 [ 30.662006] ? vma_interval_tree_remove+0xc75/0xec0 [ 30.662623] ? vma_interval_tree_remove+0xc75/0xec0 [ 30.663251] kasan_report+0xbe/0xf0 [ 30.663743] ? vma_interval_tree_remove+0xc75/0xec0 [ 30.664390] vma_interval_tree_remove+0xc75/0xec0 [ 30.665016] vma_prepare+0xc54/0x11a0 [ 30.665498] __split_vma+0x5af/0x950 [ 30.665987] ? __pfx___split_vma+0x10/0x10 [ 30.666513] ? find_held_lock+0x2c/0x110 [ 30.667047] do_vmi_align_munmap+0x2ba/0x11f0 [ 30.667614] ? lock_is_held_type+0x9f/0x120 [ 30.668174] ? __pfx_do_vmi_align_munmap+0x10/0x10 [ 30.668819] ? mtree_range_walk+0x632/0x900 [ 30.669380] ? mas_walk+0x5c7/0x7c0 [ 30.669871] do_vmi_munmap+0x1f1/0x2b0 [ 30.670367] mmap_region+0x1f9/0x2660 [ 30.670869] ? vm_mmap_pgoff+0x15c/0x3a0 [ 30.671389] ? __pfx_arch_get_unmapped_area_topdown+0x10/0x10 [ 30.672131] ? __pfx_lock_acquire+0x10/0x10 [ 30.672686] ? __pfx_mmap_region+0x10/0x10 [ 30.673238] ? security_mmap_addr+0x7d/0xa0 [ 30.673787] ? get_unmapped_area+0x1f5/0x3f0 [ 30.674336] do_mmap+0x854/0xf00 [ 30.674796] vm_mmap_pgoff+0x1a6/0x3a0 [ 30.675290] ? __pfx_vm_mmap_pgoff+0x10/0x10 [ 30.675878] ksys_mmap_pgoff+0x3af/0x500 [ 30.676400] do_syscall_64+0x3f/0x90 [ 30.676897] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 30.677549] RIP: 0033:0x7fce89bf7d82 [ 30.678020] 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 [ 30.680175] RSP: 002b:00007fffeea0ce58 EFLAGS: 00000206 ORIG_RAX: 0000000000000009 [ 30.681140] RAX: ffffffffffffffda RBX: 0000000000000812 RCX: 00007fce89bf7d82 [ 30.682019] RDX: 0000000000000005 RSI: 0000000000001000 RDI: 00007fce89031000 [ 30.682876] RBP: 00007fce89031000 R08: 0000000000000009 R09: 0000000000001000 [ 30.683734] R10: 0000000000000812 R11: 0000000000000206 R12: 000055c58cb4cb20 [ 30.684606] R13: 00007fffeea0ce70 R14: 00007fffeea0cea0 R15: 00007fffeea0d200 [ 30.685473] [ 30.685780] [ 30.686001] Allocated by task 212: [ 30.686431] kasan_save_stack+0x22/0x50 [ 30.686953] kasan_set_track+0x25/0x30 [ 30.687451] __kasan_slab_alloc+0x59/0x70 [ 30.687989] kmem_cache_alloc+0x16b/0x370 [ 30.688533] vm_area_dup+0x20/0x160 [ 30.689011] __split_vma+0x170/0x950 [ 30.689483] split_vma+0xc6/0x110 [ 30.689935] mprotect_fixup+0x8d2/0xb30 [ 30.690438] do_mprotect_pkey+0x87e/0xd40 [ 30.690972] __x64_sys_mprotect+0x78/0xc0 [ 30.691495] do_syscall_64+0x3f/0x90 [ 30.691977] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 30.692636] [ 30.692870] Freed by task 19: [ 30.693257] kasan_save_stack+0x22/0x50 [ 30.693772] kasan_set_track+0x25/0x30 [ 30.694277] kasan_save_free_info+0x2b/0x50 [ 30.694824] __kasan_slab_free+0x10a/0x190 [ 30.695369] kmem_cache_free+0x10d/0x4d0 [ 30.695900] rcu_core+0x8c8/0x2860 [ 30.696364] __do_softirq+0x1b7/0x7d4 [ 30.696855] [ 30.697070] Last potentially related work creation: [ 30.697652] kasan_save_stack+0x22/0x50 [ 30.698176] __kasan_record_aux_stack+0x8e/0xa0 [ 30.698765] __call_rcu_common.constprop.0+0x6a/0xb90 [ 30.699420] remove_vma+0x139/0x170 [ 30.699883] do_vmi_align_munmap+0xd4a/0x11f0 [ 30.700454] do_vmi_munmap+0x1f1/0x2b0 [ 30.700952] __vm_munmap+0x138/0x3a0 [ 30.701419] __x64_sys_munmap+0x59/0x80 [ 30.701933] do_syscall_64+0x3f/0x90 [ 30.702423] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 30.703084] [ 30.703309] Second to last potentially related work creation: [ 30.704017] kasan_save_stack+0x22/0x50 [ 30.704552] __kasan_record_aux_stack+0x8e/0xa0 [ 30.705144] __call_rcu_common.constprop.0+0x6a/0xb90 [ 30.705814] remove_vma+0x139/0x170 [ 30.706270] do_vmi_align_munmap+0xd4a/0x11f0 [ 30.706839] do_vmi_munmap+0x1f1/0x2b0 [ 30.707331] mmap_region+0x1f9/0x2660 [ 30.707823] do_mmap+0x854/0xf00 [ 30.708261] vm_mmap_pgoff+0x1a6/0x3a0 [ 30.708787] ksys_mmap_pgoff+0x3af/0x500 [ 30.709289] do_syscall_64+0x3f/0x90 [ 30.709782] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 30.710428] [ 30.710643] The buggy address belongs to the object at ffff88800e687570 [ 30.710643] which belongs to the cache vm_area_struct of size 168 [ 30.712146] The buggy address is located 88 bytes inside of [ 30.712146] freed 168-byte region [ffff88800e687570, ffff88800e687618) [ 30.713570] [ 30.713804] The buggy address belongs to the physical page: [ 30.714462] page:00000000c61a5e46 refcount:1 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0xe687 [ 30.715576] memcg:ffff88800e934e01 [ 30.716030] flags: 0x100000000000200(slab|node=0|zone=1) [ 30.716704] page_type: 0xffffffff() [ 30.717153] raw: 0100000000000200 ffff88800879fc80 dead000000000100 dead000000000122 [ 30.718076] raw: 0000000000000000 0000000000110011 00000001ffffffff ffff88800e934e01 [ 30.718979] page dumped because: kasan: bad access detected [ 30.719633] [ 30.719846] Memory state around the buggy address: [ 30.720424] ffff88800e687480: fc 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 [ 30.721275] ffff88800e687500: 00 00 00 00 00 00 fc fc fc fc fc fc fc fc fa fb [ 30.722138] >ffff88800e687580: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb [ 30.722991] ^ [ 30.723660] ffff88800e687600: fb fb fb fc fc fc fc fc fc fc fc 00 00 00 00 00 [ 30.724516] ffff88800e687680: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 [ 30.725360] ================================================================== [ 30.726409] Disabling lock debugging due to kernel taint [ 32.233327] BUG: Bad rss-counter state mm:00000000b666b3c6 type:MM_FILEPAGES val:33 [ 32.233949] BUG: Bad rss-counter state mm:00000000b666b3c6 type:MM_ANONPAGES val:22 [ 32.705750] BUG: Bad rss-counter state mm:00000000280698dd type:MM_FILEPAGES val:33 [ 32.706995] BUG: Bad rss-counter state mm:00000000280698dd type:MM_ANONPAGES val:22 Warning: Permanently added '[localhost]:37803' (ECDSA) to the list of known hosts. 2023/06/20 04:53:56 fuzzer started 2023/06/20 04:53:56 dialing manager at localhost:44161 2023/06/20 04:53:56 checking machine... 2023/06/20 04:53:56 checking revisions... [ 33.447950] kmemleak: Automatic memory scanning thread ended 2023/06/20 04:53:56 testing simple program... [ 33.497477] cgroup: Unknown subsys name 'net' [ 33.534222] cgroup: Unknown subsys name 'rlimit' executing program executing program executing program VM DIAGNOSIS: 04:53:56 Registers: info registers vcpu 0 RAX=0000000000000001 RBX=ffffffff85fa6c54 RCX=ffffffff8366dfde RDX=0000000000000003 RSI=ffffffff863b6868 RDI=ffffffff85fa6c3c RBP=ffffffff85fa6c50 RSP=ffff88806ce09998 R8 =ffffffff863b6868 R9 =ffff88806ce09a90 R10=0000000000038001 R11=000000000008b61a R12=ffffffff85fa6c5c R13=ffffffff85fa6c3c R14=ffffffff85fa6c4c R15=dffffc0000000000 RIP=ffffffff8112fc73 RFL=00000213 [----A-C] 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 00007f09affa7900 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=00007ffcdda2e000 CR3=0000000016b48000 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=ffff888008c58400 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=00007f552f80f9e0 CR3=000000000b3bc000 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=a32b28fc3a9aa58dbc4729da5835efd4 XMM02=ec2efd57dc4c00df000000000011dd50 XMM03=00123d01c1ecc745000000000011de20 XMM04=734cca9f02a2dc6600000000000ae988 XMM05=0e9cfeb36b59da060000000000135dc8 XMM06=806171799158d9670000000000134af8 XMM07=e042d86d42eb936e0000000000124268 XMM08=00123d01c1ecc745000000000011de20 XMM09=00000000000000000000000000000000 XMM10=00000000000000000000000000000000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000