syzkaller login: [ 31.429221] BUG: Bad rss-counter state mm:000000002461b27b type:MM_FILEPAGES val:33 [ 31.430316] BUG: Bad rss-counter state mm:000000002461b27b type:MM_ANONPAGES val:22 [ 31.469624] ================================================================== [ 31.470780] BUG: KASAN: slab-use-after-free in vma_interval_tree_remove+0xc75/0xec0 [ 31.471918] Read of size 8 at addr ffff88800d770140 by task sshd/220 [ 31.472936] [ 31.473187] CPU: 1 PID: 220 Comm: sshd Not tainted 6.4.0-rc7-next-20230620 #1 [ 31.474217] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS 1.12.0-1 04/01/2014 [ 31.475460] Call Trace: [ 31.475823] [ 31.476197] dump_stack_lvl+0x91/0xf0 [ 31.476806] print_report+0xcc/0x620 [ 31.477362] ? __virt_addr_valid+0x102/0x340 [ 31.478009] ? vma_interval_tree_remove+0xc75/0xec0 [ 31.478727] ? vma_interval_tree_remove+0xc75/0xec0 [ 31.479481] kasan_report+0xbe/0xf0 [ 31.479994] ? vma_interval_tree_remove+0xc75/0xec0 [ 31.480802] vma_interval_tree_remove+0xc75/0xec0 [ 31.481463] vma_prepare+0xc54/0x11a0 [ 31.481974] __split_vma+0x5af/0x950 [ 31.482479] ? __pfx___split_vma+0x10/0x10 [ 31.483042] ? find_held_lock+0x2c/0x110 [ 31.483593] do_vmi_align_munmap+0x2ba/0x11f0 [ 31.484199] ? lock_is_held_type+0x9f/0x120 [ 31.484790] ? __pfx_do_vmi_align_munmap+0x10/0x10 [ 31.485434] ? mtree_range_walk+0x632/0x900 [ 31.486024] ? mas_walk+0x5c7/0x7c0 [ 31.486529] do_vmi_munmap+0x1f1/0x2b0 [ 31.487053] mmap_region+0x1f9/0x2660 [ 31.487567] ? vm_mmap_pgoff+0x15c/0x3a0 [ 31.488110] ? __pfx_arch_get_unmapped_area_topdown+0x10/0x10 [ 31.488874] ? __pfx_lock_acquire+0x10/0x10 [ 31.489444] ? __pfx_mmap_region+0x10/0x10 [ 31.490019] ? security_mmap_addr+0x7d/0xa0 [ 31.490599] ? get_unmapped_area+0x1f5/0x3f0 [ 31.491205] do_mmap+0x854/0xf00 [ 31.491683] vm_mmap_pgoff+0x1a6/0x3a0 [ 31.492224] ? __pfx_vm_mmap_pgoff+0x10/0x10 [ 31.492833] ksys_mmap_pgoff+0x3af/0x500 [ 31.493388] do_syscall_64+0x3f/0x90 [ 31.493907] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 31.494613] RIP: 0033:0x7fd99b62cd82 [ 31.495108] 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 [ 31.497448] RSP: 002b:00007ffe343bc028 EFLAGS: 00000206 ORIG_RAX: 0000000000000009 [ 31.498423] RAX: ffffffffffffffda RBX: 0000000000000812 RCX: 00007fd99b62cd82 [ 31.499344] RDX: 0000000000000005 RSI: 0000000000001000 RDI: 00007fd99aa66000 [ 31.500267] RBP: 00007fd99aa66000 R08: 0000000000000009 R09: 0000000000001000 [ 31.501181] R10: 0000000000000812 R11: 0000000000000206 R12: 00005592a0ef4ec0 [ 31.502093] R13: 00007ffe343bc040 R14: 00007ffe343bc070 R15: 00007ffe343bc3d0 [ 31.503023] [ 31.503334] [ 31.503563] Allocated by task 213: [ 31.504018] kasan_save_stack+0x22/0x50 [ 31.504561] kasan_set_track+0x25/0x30 [ 31.505087] __kasan_slab_alloc+0x59/0x70 [ 31.505648] kmem_cache_alloc+0x16b/0x370 [ 31.506199] vm_area_dup+0x20/0x160 [ 31.506689] __split_vma+0x170/0x950 [ 31.507185] split_vma+0xc6/0x110 [ 31.507654] mprotect_fixup+0x8d2/0xb30 [ 31.508198] do_mprotect_pkey+0x87e/0xd40 [ 31.508764] __x64_sys_mprotect+0x78/0xc0 [ 31.509319] do_syscall_64+0x3f/0x90 [ 31.509825] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 31.510587] [ 31.510823] Freed by task 203: [ 31.511243] kasan_save_stack+0x22/0x50 [ 31.511782] kasan_set_track+0x25/0x30 [ 31.512310] kasan_save_free_info+0x2b/0x50 [ 31.512871] __kasan_slab_free+0x10a/0x190 [ 31.513435] kmem_cache_free+0x10d/0x4d0 [ 31.513977] rcu_core+0x8c8/0x2860 [ 31.514448] __do_softirq+0x1b7/0x7d4 [ 31.514952] [ 31.515180] Last potentially related work creation: [ 31.515804] kasan_save_stack+0x22/0x50 [ 31.516337] __kasan_record_aux_stack+0x8e/0xa0 [ 31.516966] __call_rcu_common.constprop.0+0x6a/0xb90 [ 31.517650] remove_vma+0x139/0x170 [ 31.518133] do_vmi_align_munmap+0xd4a/0x11f0 [ 31.518716] do_vmi_munmap+0x1f1/0x2b0 [ 31.519227] __vm_munmap+0x138/0x3a0 [ 31.519725] __x64_sys_munmap+0x59/0x80 [ 31.520254] do_syscall_64+0x3f/0x90 [ 31.520767] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 31.521445] [ 31.521672] The buggy address belongs to the object at ffff88800d7700e8 [ 31.521672] which belongs to the cache vm_area_struct of size 168 [ 31.523214] The buggy address is located 88 bytes inside of [ 31.523214] freed 168-byte region [ffff88800d7700e8, ffff88800d770190) [ 31.524722] [ 31.524949] The buggy address belongs to the physical page: [ 31.525656] page:00000000590afd42 refcount:1 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0xd770 [ 31.526794] memcg:ffff88800d961b01 [ 31.527244] flags: 0x100000000000200(slab|node=0|zone=1) [ 31.527922] page_type: 0xffffffff() [ 31.528405] raw: 0100000000000200 ffff8880087a0c80 ffffea0000573d40 dead000000000008 [ 31.529383] raw: 0000000000000000 0000000000110011 00000001ffffffff ffff88800d961b01 [ 31.530327] page dumped because: kasan: bad access detected [ 31.531018] [ 31.531246] Memory state around the buggy address: [ 31.531857] ffff88800d770000: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 [ 31.532773] ffff88800d770080: 00 00 00 00 00 fc fc fc fc fc fc fc fc fa fb fb [ 31.533672] >ffff88800d770100: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb [ 31.534560] ^ [ 31.535218] ffff88800d770180: fb fb fc fc fc fc fc fc fc fc fa fb fb fb fb fb [ 31.536125] ffff88800d770200: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fc [ 31.537033] ================================================================== [ 31.538046] Disabling lock debugging due to kernel taint [ 33.744531] BUG: Bad rss-counter state mm:0000000051a4f17e type:MM_FILEPAGES val:33 [ 33.745731] BUG: Bad rss-counter state mm:0000000051a4f17e type:MM_ANONPAGES val:22 [ 34.254888] BUG: Bad rss-counter state mm:00000000e008ddcd type:MM_FILEPAGES val:33 [ 34.256060] BUG: Bad rss-counter state mm:00000000e008ddcd type:MM_ANONPAGES val:22 Warning: Permanently added '[localhost]:44157' (ECDSA) to the list of known hosts. 2023/06/20 12:28:20 fuzzer started 2023/06/20 12:28:20 dialing manager at localhost:36067 2023/06/20 12:28:20 checking machine... 2023/06/20 12:28:20 checking revisions... [ 34.968552] kmemleak: Automatic memory scanning thread ended 2023/06/20 12:28:20 testing simple program... [ 35.011103] cgroup: Unknown subsys name 'net' [ 35.064520] cgroup: Unknown subsys name 'rlimit' executing program executing program executing program VM DIAGNOSIS: 12:28:20 Registers: info registers vcpu 0 RAX=0000000080010002 RBX=0000000002af484c RCX=ffffffff813fec47 RDX=ffff88800b3b0000 RSI=0000000000000000 RDI=0000000000000005 RBP=ffffffff87b6c480 RSP=ffff88806ce09c80 R8 =0000000000000005 R9 =0000000000000000 R10=0000000000000001 R11=ffff88806ce09ff8 R12=0000000000000022 R13=0000000000000001 R14=0000000000000001 R15=ffffffff87b6c4a8 RIP=ffffffff813fec47 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 =0000 0000000000000000 00000000 00000000 DS =0000 0000000000000000 00000000 00000000 FS =0000 00007fdbc410e900 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=00007fdbc362d018 CR3=000000000cb82000 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=000000000011b310b3285ca56c489dff XMM01=000000000011b4c0d59e07bde36eea69 XMM02=000000000011b5e8ec2efd57dc4c00df XMM03=0000000000122b602b30dda626ea1fb3 XMM04=cc5eb4b1a09f10d100000000000ae988 XMM05=19e9129bd510f23500000000001329d0 XMM06=3ec0fbee43dd591c0000000000131838 XMM07=e042d86d42eb936e0000000000122de0 XMM08=2b30dda626ea1fb3000000000011b648 XMM09=00000000000000000000000000000000 XMM10=20200000000020202020202020200000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000 info registers vcpu 1 RAX=0000000000000000 RBX=0000000000000001 RCX=ffffffff8121b372 RDX=ffff888008e0d1c0 RSI=0000000000000002 RDI=0000000000000005 RBP=ffffffff84868920 RSP=ffff888008e37ea0 R8 =0000000000000005 R9 =0000000000000000 R10=0000000000000001 R11=0000000000000128 R12=0000000000000001 R13=0000000000000005 R14=0000000000000002 R15=0000000000000001 RIP=ffffffff814c04a0 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 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=00007ffcf4e4a000 CR3=000000000e38c000 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