syzkaller login: [ 35.296438] BUG: Bad rss-counter state mm:00000000a14e3e5e type:MM_FILEPAGES val:33 [ 35.297706] BUG: Bad rss-counter state mm:00000000a14e3e5e type:MM_ANONPAGES val:22 [ 35.335927] ================================================================== [ 35.336953] BUG: KASAN: slab-use-after-free in vma_interval_tree_remove+0xc75/0xec0 [ 35.337879] Read of size 8 at addr ffff888019f11ed8 by task sshd/218 [ 35.338740] [ 35.338956] CPU: 0 PID: 218 Comm: sshd Not tainted 6.4.0-rc7-next-20230619 #1 [ 35.339793] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS 1.12.0-1 04/01/2014 [ 35.340771] Call Trace: [ 35.341084] [ 35.341365] dump_stack_lvl+0x91/0xf0 [ 35.341846] print_report+0xcc/0x620 [ 35.342319] ? __virt_addr_valid+0x102/0x340 [ 35.342859] ? vma_interval_tree_remove+0xc75/0xec0 [ 35.343465] ? vma_interval_tree_remove+0xc75/0xec0 [ 35.344077] kasan_report+0xbe/0xf0 [ 35.344561] ? vma_interval_tree_remove+0xc75/0xec0 [ 35.345185] vma_interval_tree_remove+0xc75/0xec0 [ 35.345778] vma_prepare+0xc54/0x11a0 [ 35.346247] __split_vma+0x5af/0x950 [ 35.346711] ? __pfx___split_vma+0x10/0x10 [ 35.347230] ? find_held_lock+0x2c/0x110 [ 35.347743] do_vmi_align_munmap+0x2ba/0x11f0 [ 35.348297] ? lock_is_held_type+0x9f/0x120 [ 35.348843] ? __pfx_do_vmi_align_munmap+0x10/0x10 [ 35.349439] ? mtree_range_walk+0x632/0x900 [ 35.349983] ? mas_walk+0x5c7/0x7c0 [ 35.350454] do_vmi_munmap+0x1f1/0x2b0 [ 35.350937] mmap_region+0x1f9/0x2660 [ 35.351415] ? vm_mmap_pgoff+0x15c/0x3a0 [ 35.351915] ? __pfx_arch_get_unmapped_area_topdown+0x10/0x10 [ 35.352628] ? __pfx_lock_acquire+0x10/0x10 [ 35.353152] ? __pfx_mmap_region+0x10/0x10 [ 35.353672] ? security_mmap_addr+0x7d/0xa0 [ 35.354201] ? get_unmapped_area+0x1f5/0x3f0 [ 35.354740] do_mmap+0x854/0xf00 [ 35.355171] vm_mmap_pgoff+0x1a6/0x3a0 [ 35.355661] ? __pfx_vm_mmap_pgoff+0x10/0x10 [ 35.356210] ksys_mmap_pgoff+0x3af/0x500 [ 35.356718] do_syscall_64+0x3f/0x90 [ 35.357190] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 35.357824] RIP: 0033:0x7fddf4273d82 [ 35.358272] 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 [ 35.360361] RSP: 002b:00007ffdf153f188 EFLAGS: 00000206 ORIG_RAX: 0000000000000009 [ 35.361274] RAX: ffffffffffffffda RBX: 0000000000000812 RCX: 00007fddf4273d82 [ 35.362108] RDX: 0000000000000005 RSI: 0000000000001000 RDI: 00007fddf36ad000 [ 35.362938] RBP: 00007fddf36ad000 R08: 0000000000000009 R09: 0000000000001000 [ 35.363775] R10: 0000000000000812 R11: 0000000000000206 R12: 000055ed0a5b0d90 [ 35.364620] R13: 00007ffdf153f1a0 R14: 00007ffdf153f1d0 R15: 00007ffdf153f530 [ 35.365468] [ 35.365755] [ 35.365969] Allocated by task 211: [ 35.366397] kasan_save_stack+0x22/0x50 [ 35.366895] kasan_set_track+0x25/0x30 [ 35.367380] __kasan_slab_alloc+0x59/0x70 [ 35.367897] kmem_cache_alloc+0x16b/0x370 [ 35.368405] vm_area_dup+0x20/0x160 [ 35.368875] __split_vma+0x170/0x950 [ 35.369337] split_vma+0xc6/0x110 [ 35.369775] mprotect_fixup+0x8d2/0xb30 [ 35.370272] do_mprotect_pkey+0x87e/0xd40 [ 35.370787] __x64_sys_mprotect+0x78/0xc0 [ 35.371300] do_syscall_64+0x3f/0x90 [ 35.371771] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 35.372405] [ 35.372630] Freed by task 19: [ 35.373004] kasan_save_stack+0x22/0x50 [ 35.373531] kasan_set_track+0x25/0x30 [ 35.374012] kasan_save_free_info+0x2b/0x50 [ 35.374534] __kasan_slab_free+0x10a/0x190 [ 35.375058] kmem_cache_free+0x10d/0x4d0 [ 35.375555] rcu_core+0x8c8/0x2860 [ 35.375996] __do_softirq+0x1b7/0x7d4 [ 35.376479] [ 35.376693] Last potentially related work creation: [ 35.377269] kasan_save_stack+0x22/0x50 [ 35.377759] __kasan_record_aux_stack+0x8e/0xa0 [ 35.378331] __call_rcu_common.constprop.0+0x6a/0xb90 [ 35.378961] remove_vma+0x139/0x170 [ 35.379410] do_vmi_align_munmap+0xd4a/0x11f0 [ 35.379959] do_vmi_munmap+0x1f1/0x2b0 [ 35.380454] __vm_munmap+0x138/0x3a0 [ 35.380920] __x64_sys_munmap+0x59/0x80 [ 35.381415] do_syscall_64+0x3f/0x90 [ 35.381878] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 35.382505] [ 35.382715] Second to last potentially related work creation: [ 35.383383] kasan_save_stack+0x22/0x50 [ 35.383873] __kasan_record_aux_stack+0x8e/0xa0 [ 35.384436] __call_rcu_common.constprop.0+0x6a/0xb90 [ 35.385074] remove_vma+0x139/0x170 [ 35.385516] do_vmi_align_munmap+0xd4a/0x11f0 [ 35.386058] do_vmi_munmap+0x1f1/0x2b0 [ 35.386542] mmap_region+0x1f9/0x2660 [ 35.387015] do_mmap+0x854/0xf00 [ 35.387440] vm_mmap_pgoff+0x1a6/0x3a0 [ 35.387919] ksys_mmap_pgoff+0x3af/0x500 [ 35.388428] do_syscall_64+0x3f/0x90 [ 35.388891] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 35.389526] [ 35.389741] The buggy address belongs to the object at ffff888019f11e80 [ 35.389741] which belongs to the cache vm_area_struct of size 168 [ 35.391179] The buggy address is located 88 bytes inside of [ 35.391179] freed 168-byte region [ffff888019f11e80, ffff888019f11f28) [ 35.392557] [ 35.392770] The buggy address belongs to the physical page: [ 35.393410] page:00000000caa6d755 refcount:1 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0x19f11 [ 35.394484] memcg:ffff888019f12001 [ 35.394911] flags: 0x100000000000200(slab|node=0|zone=1) [ 35.395562] page_type: 0xffffffff() [ 35.396012] raw: 0100000000000200 ffff88800879fc80 ffffea000067b600 dead000000000006 [ 35.396938] raw: 0000000000000000 0000000000110011 00000001ffffffff ffff888019f12001 [ 35.397842] page dumped because: kasan: bad access detected [ 35.398497] [ 35.398708] Memory state around the buggy address: [ 35.399295] ffff888019f11d80: fc fc fc fa fb fb fb fb fb fb fb fb fb fb fb fb [ 35.400149] ffff888019f11e00: fb fb fb fb fb fb fb fb fc fc fc fc fc fc fc fc [ 35.401030] >ffff888019f11e80: fa fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb [ 35.401890] ^ [ 35.402606] ffff888019f11f00: fb fb fb fb fb fc fc fc fc fc fc fc fc fc fc fc [ 35.403465] ffff888019f11f80: fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc [ 35.404310] ================================================================== [ 35.405455] Disabling lock debugging due to kernel taint [ 37.415713] BUG: Bad rss-counter state mm:00000000dcbb2ad0 type:MM_FILEPAGES val:33 [ 37.416671] BUG: Bad rss-counter state mm:00000000dcbb2ad0 type:MM_ANONPAGES val:22 [ 37.960751] BUG: Bad rss-counter state mm:000000009f793abc type:MM_FILEPAGES val:33 [ 37.961726] BUG: Bad rss-counter state mm:000000009f793abc type:MM_ANONPAGES val:22 Warning: Permanently added '[localhost]:20501' (ECDSA) to the list of known hosts. 2023/06/20 10:43:27 fuzzer started 2023/06/20 10:43:28 dialing manager at localhost:44161 2023/06/20 10:43:28 checking machine... 2023/06/20 10:43:28 checking revisions... [ 38.721218] kmemleak: Automatic memory scanning thread ended 2023/06/20 10:43:28 testing simple program... [ 38.768699] cgroup: Unknown subsys name 'net' [ 38.820882] cgroup: Unknown subsys name 'rlimit' executing program executing program executing program VM DIAGNOSIS: 10:43:23 Registers: info registers vcpu 0 RAX=0000000000000000 RBX=0000000000000001 RCX=0000000000000000 RDX=1ffff1100340df72 RSI=ffffffff818bf13a RDI=ffff88801a06fb78 RBP=0000000000000000 RSP=ffff88801a06f908 R8 =0000000000000005 R9 =0000000000000000 R10=0000000000000001 R11=0000000000000000 R12=0000000000000000 R13=ffff88801a06fb68 R14=0000000000000345 R15=dffffc0000000000 RIP=ffffffff818bf18b 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 00007fd7a6410900 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=00007ffcd5ba3000 CR3=000000000e348000 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=00007ff10119b700 CR3=000000000c6c8000 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=d8dbef05030a3989374bb06f83914eba XMM02=000000000011fa00ec2efd57dc4c00df XMM03=00000000001236a8e821b7d8786a105b XMM04=a6ac1f85ea421dd700000000000ae988 XMM05=19e9129bd510f23500000000001345a0 XMM06=8bd461dc74084f6a0000000000133778 XMM07=e042d86d42eb936e0000000000123928 XMM08=e821b7d8786a105b000000000011fa60 XMM09=00000000000000000000000000000000 XMM10=20200000000020202020202020200000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000