syzkaller login: [ 31.487705] BUG: Bad rss-counter state mm:000000006f674b6a type:MM_FILEPAGES val:33 [ 31.488716] BUG: Bad rss-counter state mm:000000006f674b6a type:MM_ANONPAGES val:22 [ 31.650594] ================================================================== [ 31.651494] BUG: KASAN: slab-use-after-free in vma_interval_tree_remove+0xc75/0xec0 [ 31.652422] Read of size 8 at addr ffff8880159566b0 by task sshd/220 [ 31.653181] [ 31.653404] CPU: 1 PID: 220 Comm: sshd Not tainted 6.4.0-rc7-next-20230620 #1 [ 31.654348] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS 1.12.0-1 04/01/2014 [ 31.655315] Call Trace: [ 31.655632] [ 31.655916] dump_stack_lvl+0x91/0xf0 [ 31.656410] print_report+0xcc/0x620 [ 31.656892] ? __virt_addr_valid+0x102/0x340 [ 31.657473] ? vma_interval_tree_remove+0xc75/0xec0 [ 31.658094] ? vma_interval_tree_remove+0xc75/0xec0 [ 31.658709] kasan_report+0xbe/0xf0 [ 31.659187] ? vma_interval_tree_remove+0xc75/0xec0 [ 31.659808] vma_interval_tree_remove+0xc75/0xec0 [ 31.660453] vma_prepare+0xc54/0x11a0 [ 31.660965] __split_vma+0x5af/0x950 [ 31.661465] ? __pfx___split_vma+0x10/0x10 [ 31.661989] ? find_held_lock+0x2c/0x110 [ 31.662516] do_vmi_align_munmap+0x2ba/0x11f0 [ 31.663109] ? lock_is_held_type+0x9f/0x120 [ 31.663648] ? __pfx_do_vmi_align_munmap+0x10/0x10 [ 31.664259] ? mtree_range_walk+0x632/0x900 [ 31.664833] ? mas_walk+0x5c7/0x7c0 [ 31.665308] do_vmi_munmap+0x1f1/0x2b0 [ 31.665816] mmap_region+0x1f9/0x2660 [ 31.666302] ? vm_mmap_pgoff+0x15c/0x3a0 [ 31.666807] ? __pfx_arch_get_unmapped_area_topdown+0x10/0x10 [ 31.667489] ? __pfx_lock_acquire+0x10/0x10 [ 31.667999] ? __pfx_mmap_region+0x10/0x10 [ 31.668510] ? security_mmap_addr+0x7d/0xa0 [ 31.669039] ? get_unmapped_area+0x1f5/0x3f0 [ 31.669609] do_mmap+0x854/0xf00 [ 31.670046] vm_mmap_pgoff+0x1a6/0x3a0 [ 31.670544] ? __pfx_vm_mmap_pgoff+0x10/0x10 [ 31.671106] ksys_mmap_pgoff+0x3af/0x500 [ 31.671616] do_syscall_64+0x3f/0x90 [ 31.672097] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 31.672747] RIP: 0033:0x7f68b31add82 [ 31.673204] 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 [ 31.675354] RSP: 002b:00007ffe5aa700a8 EFLAGS: 00000206 ORIG_RAX: 0000000000000009 [ 31.676275] RAX: ffffffffffffffda RBX: 0000000000000812 RCX: 00007f68b31add82 [ 31.677133] RDX: 0000000000000005 RSI: 0000000000001000 RDI: 00007f68b25e7000 [ 31.678002] RBP: 00007f68b25e7000 R08: 0000000000000009 R09: 0000000000001000 [ 31.678862] R10: 0000000000000812 R11: 0000000000000206 R12: 0000557746256ec0 [ 31.679710] R13: 00007ffe5aa700c0 R14: 00007ffe5aa700f0 R15: 00007ffe5aa70450 [ 31.680573] [ 31.680873] [ 31.681086] Allocated by task 213: [ 31.681522] kasan_save_stack+0x22/0x50 [ 31.682031] kasan_set_track+0x25/0x30 [ 31.682528] __kasan_slab_alloc+0x59/0x70 [ 31.683049] kmem_cache_alloc+0x16b/0x370 [ 31.683569] vm_area_dup+0x20/0x160 [ 31.684025] __split_vma+0x170/0x950 [ 31.684506] split_vma+0xc6/0x110 [ 31.684967] mprotect_fixup+0x8d2/0xb30 [ 31.685495] do_mprotect_pkey+0x87e/0xd40 [ 31.686016] __x64_sys_mprotect+0x78/0xc0 [ 31.686541] do_syscall_64+0x3f/0x90 [ 31.687030] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 31.687679] [ 31.687894] Freed by task 203: [ 31.688288] kasan_save_stack+0x22/0x50 [ 31.688789] kasan_set_track+0x25/0x30 [ 31.689284] kasan_save_free_info+0x2b/0x50 [ 31.689827] __kasan_slab_free+0x10a/0x190 [ 31.690362] kmem_cache_free+0x10d/0x4d0 [ 31.690874] rcu_core+0x8c8/0x2860 [ 31.691322] __do_softirq+0x1b7/0x7d4 [ 31.691800] [ 31.692016] Last potentially related work creation: [ 31.692600] kasan_save_stack+0x22/0x50 [ 31.693101] __kasan_record_aux_stack+0x8e/0xa0 [ 31.693689] __call_rcu_common.constprop.0+0x6a/0xb90 [ 31.694334] remove_vma+0x139/0x170 [ 31.694783] do_vmi_align_munmap+0xd4a/0x11f0 [ 31.695388] do_vmi_munmap+0x1f1/0x2b0 [ 31.695870] __vm_munmap+0x138/0x3a0 [ 31.696341] __x64_sys_munmap+0x59/0x80 [ 31.696833] do_syscall_64+0x3f/0x90 [ 31.697311] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 31.697992] [ 31.698207] The buggy address belongs to the object at ffff888015956658 [ 31.698207] which belongs to the cache vm_area_struct of size 168 [ 31.699682] The buggy address is located 88 bytes inside of [ 31.699682] freed 168-byte region [ffff888015956658, ffff888015956700) [ 31.701101] [ 31.701316] The buggy address belongs to the physical page: [ 31.702003] page:000000000154ff0a refcount:1 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0x15956 [ 31.703109] memcg:ffff888015957001 [ 31.703538] flags: 0x100000000000200(slab|node=0|zone=1) [ 31.704191] page_type: 0xffffffff() [ 31.704648] raw: 0100000000000200 ffff8880087a0c80 dead000000000122 0000000000000000 [ 31.705580] raw: 0000000000000000 0000000000110011 00000001ffffffff ffff888015957001 [ 31.706488] page dumped because: kasan: bad access detected [ 31.707166] [ 31.707385] Memory state around the buggy address: [ 31.707957] ffff888015956580: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 [ 31.708812] ffff888015956600: 00 00 00 fc fc fc fc fc fc fc fc fa fb fb fb fb [ 31.709678] >ffff888015956680: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb [ 31.710539] ^ [ 31.711126] ffff888015956700: fc fc fc fc fc fc fc fc fa fb fb fb fb fb fb fb [ 31.711994] ffff888015956780: fb fb fb fb fb fb fb fb fb fb fb fb fb fc fc fc [ 31.712839] ================================================================== [ 31.713813] Disabling lock debugging due to kernel taint [ 33.732863] BUG: Bad rss-counter state mm:00000000deb88db5 type:MM_FILEPAGES val:33 [ 33.733808] BUG: Bad rss-counter state mm:00000000deb88db5 type:MM_ANONPAGES val:22 [ 34.213039] BUG: Bad rss-counter state mm:00000000ea5d951c type:MM_FILEPAGES val:33 [ 34.214279] BUG: Bad rss-counter state mm:00000000ea5d951c type:MM_ANONPAGES val:22 Warning: Permanently added '[localhost]:38503' (ECDSA) to the list of known hosts. 2023/06/21 07:03:13 fuzzer started 2023/06/21 07:03:13 dialing manager at localhost:36067 2023/06/21 07:03:13 checking machine... 2023/06/21 07:03:13 checking revisions... [ 34.932025] kmemleak: Automatic memory scanning thread ended 2023/06/21 07:03:13 testing simple program... [ 34.976031] cgroup: Unknown subsys name 'net' [ 35.015811] cgroup: Unknown subsys name 'rlimit' executing program executing program executing program VM DIAGNOSIS: 07:03:13 Registers: info registers vcpu 0 RAX=1ffff110013cc20e RBX=ffff88800ede0198 RCX=ffffffff812e0135 RDX=0000000000000000 RSI=0000000000000000 RDI=ffff888009e61070 RBP=ffff888009d47000 RSP=ffff888014797d18 R8 =0000000000000001 R9 =ffffed10028f2f97 R10=0000000000000003 R11=00000000000b6a61 R12=dffffc0000000000 R13=ffff888009d49100 R14=ffffffff818937f2 R15=dffffc0000000000 RIP=ffffffff8184652d 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 00007fc5ba1bf900 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=00007fc5b9649e00 CR3=000000000cab8000 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=70f6c94bd1d7951b00000000000ae988 XMM05=5cae2312eb07ea5d00000000001325f0 XMM06=19e9129bd510f2350000000000131738 XMM07=00000000000000000000000000000000 XMM08=415453454d49545f454d49544c414552 XMM09=00000000000000000000000000000000 XMM10=20200000000020202020202020200000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000 info registers vcpu 1 RAX=dffffc0000000000 RBX=0000000000000001 RCX=ffffffff864bbb54 RDX=1ffff11001fbdebd RSI=0000000000000000 RDI=ffff88800fdef5f0 RBP=00000000000000f4 RSP=ffff88800fdef530 R8 =ffffffff864bbb58 R9 =ffff88800fdef5e0 R10=0000000000038001 R11=00000000000b6a61 R12=ffff88800fdeff58 R13=ffff88800fdef5e8 R14=ffff88800fdeff58 R15=ffff88800fdef5a0 RIP=ffffffff81131c60 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 00007f4c26c60900 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=00007ffec542c000 CR3=0000000019d32000 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=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