syzkaller login: [ 30.503431] BUG: Bad rss-counter state mm:000000007015564a type:MM_FILEPAGES val:33 [ 30.504106] BUG: Bad rss-counter state mm:000000007015564a type:MM_ANONPAGES val:22 [ 30.758841] ================================================================== [ 30.760936] BUG: KASAN: slab-use-after-free in vma_interval_tree_remove+0xc75/0xec0 [ 30.764004] Read of size 8 at addr ffff88801916bd08 by task sshd/220 [ 30.766369] [ 30.766750] CPU: 1 PID: 220 Comm: sshd Not tainted 6.4.0-rc7-next-20230620 #1 [ 30.768913] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS 1.12.0-1 04/01/2014 [ 30.771444] Call Trace: [ 30.772445] [ 30.773117] dump_stack_lvl+0x91/0xf0 [ 30.773468] print_report+0xcc/0x620 [ 30.773803] ? __virt_addr_valid+0x102/0x340 [ 30.774178] ? vma_interval_tree_remove+0xc75/0xec0 [ 30.774617] ? vma_interval_tree_remove+0xc75/0xec0 [ 30.775039] kasan_report+0xbe/0xf0 [ 30.775375] ? vma_interval_tree_remove+0xc75/0xec0 [ 30.779378] vma_interval_tree_remove+0xc75/0xec0 [ 30.782909] vma_prepare+0xc54/0x11a0 [ 30.784900] __split_vma+0x5af/0x950 [ 30.786760] ? __pfx___split_vma+0x10/0x10 [ 30.788190] ? find_held_lock+0x2c/0x110 [ 30.789100] do_vmi_align_munmap+0x2ba/0x11f0 [ 30.790289] ? lock_is_held_type+0x9f/0x120 [ 30.791407] ? __pfx_do_vmi_align_munmap+0x10/0x10 [ 30.792837] ? mtree_range_walk+0x632/0x900 [ 30.794004] ? mas_walk+0x5c7/0x7c0 [ 30.794924] do_vmi_munmap+0x1f1/0x2b0 [ 30.795951] mmap_region+0x1f9/0x2660 [ 30.796959] ? vm_mmap_pgoff+0x15c/0x3a0 [ 30.797938] ? __pfx_arch_get_unmapped_area_topdown+0x10/0x10 [ 30.799527] ? __pfx_lock_acquire+0x10/0x10 [ 30.800632] ? __pfx_mmap_region+0x10/0x10 [ 30.801705] ? security_mmap_addr+0x7d/0xa0 [ 30.802728] ? get_unmapped_area+0x1f5/0x3f0 [ 30.803859] do_mmap+0x854/0xf00 [ 30.804670] vm_mmap_pgoff+0x1a6/0x3a0 [ 30.805742] ? __pfx_vm_mmap_pgoff+0x10/0x10 [ 30.806602] ksys_mmap_pgoff+0x3af/0x500 [ 30.807421] do_syscall_64+0x3f/0x90 [ 30.808160] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 30.809158] RIP: 0033:0x7f808455ed82 [ 30.809873] 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 [ 30.814627] RSP: 002b:00007ffd7881fa08 EFLAGS: 00000206 ORIG_RAX: 0000000000000009 [ 30.816571] RAX: ffffffffffffffda RBX: 0000000000000812 RCX: 00007f808455ed82 [ 30.818424] RDX: 0000000000000005 RSI: 0000000000001000 RDI: 00007f8083998000 [ 30.819816] RBP: 00007f8083998000 R08: 0000000000000009 R09: 0000000000001000 [ 30.821448] R10: 0000000000000812 R11: 0000000000000206 R12: 00005559b155fd90 [ 30.823397] R13: 00007ffd7881fa20 R14: 00007ffd7881fa50 R15: 00007ffd7881fdb0 [ 30.825265] [ 30.825812] [ 30.826332] Allocated by task 212: [ 30.827250] kasan_save_stack+0x22/0x50 [ 30.828294] kasan_set_track+0x25/0x30 [ 30.829137] __kasan_slab_alloc+0x59/0x70 [ 30.829596] kmem_cache_alloc+0x16b/0x370 [ 30.829974] vm_area_dup+0x20/0x160 [ 30.830289] __split_vma+0x170/0x950 [ 30.830613] split_vma+0xc6/0x110 [ 30.830902] mprotect_fixup+0x8d2/0xb30 [ 30.831257] do_mprotect_pkey+0x87e/0xd40 [ 30.831763] __x64_sys_mprotect+0x78/0xc0 [ 30.832233] do_syscall_64+0x3f/0x90 [ 30.832610] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 30.833260] [ 30.833482] Freed by task 212: [ 30.833849] kasan_save_stack+0x22/0x50 [ 30.834227] kasan_set_track+0x25/0x30 [ 30.834639] kasan_save_free_info+0x2b/0x50 [ 30.835094] __kasan_slab_free+0x10a/0x190 [ 30.839621] kmem_cache_free+0x10d/0x4d0 [ 30.840174] rcu_core+0x8c8/0x2860 [ 30.840554] __do_softirq+0x1b7/0x7d4 [ 30.840914] [ 30.841124] Last potentially related work creation: [ 30.841548] kasan_save_stack+0x22/0x50 [ 30.841970] __kasan_record_aux_stack+0x8e/0xa0 [ 30.842418] __call_rcu_common.constprop.0+0x6a/0xb90 [ 30.842977] remove_vma+0x139/0x170 [ 30.843323] do_vmi_align_munmap+0xd4a/0x11f0 [ 30.845702] do_vmi_munmap+0x1f1/0x2b0 [ 30.846126] __vm_munmap+0x138/0x3a0 [ 30.846422] __x64_sys_munmap+0x59/0x80 [ 30.846716] do_syscall_64+0x3f/0x90 [ 30.846995] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 30.847379] [ 30.847516] The buggy address belongs to the object at ffff88801916bcb0 [ 30.847516] which belongs to the cache vm_area_struct of size 168 [ 30.848395] The buggy address is located 88 bytes inside of [ 30.848395] freed 168-byte region [ffff88801916bcb0, ffff88801916bd58) [ 30.849228] [ 30.849357] The buggy address belongs to the physical page: [ 30.849757] page:0000000047f182e7 refcount:1 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0x1916b [ 30.850407] memcg:ffff88800eac9401 [ 30.850664] flags: 0x100000000000200(slab|node=0|zone=1) [ 30.851047] page_type: 0xffffffff() [ 30.851316] raw: 0100000000000200 ffff8880087a0c80 ffffea00005a95c0 dead000000000004 [ 30.851962] raw: 0000000000000000 0000000000110011 00000001ffffffff ffff88800eac9401 [ 30.852503] page dumped because: kasan: bad access detected [ 30.852894] [ 30.853022] Memory state around the buggy address: [ 30.853365] ffff88801916bc00: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fc fc [ 30.853880] ffff88801916bc80: fc fc fc fc fc fc fa fb fb fb fb fb fb fb fb fb [ 30.854388] >ffff88801916bd00: fb fb fb fb fb fb fb fb fb fb fb fc fc fc fc fc [ 30.854891] ^ [ 30.855153] ffff88801916bd80: fc fc fc fa fb fb fb fb fb fb fb fb fb fb fb fb [ 30.855872] ffff88801916be00: fb fb fb fb fb fb fb fb fc fc fc fc fc fc fc fc [ 30.856508] ================================================================== [ 30.857246] Disabling lock debugging due to kernel taint [ 33.700840] BUG: Bad rss-counter state mm:000000004bdeafa1 type:MM_FILEPAGES val:33 [ 33.701511] BUG: Bad rss-counter state mm:000000004bdeafa1 type:MM_ANONPAGES val:22 [ 34.819512] BUG: Bad rss-counter state mm:000000005e08f165 type:MM_FILEPAGES val:33 [ 34.820454] BUG: Bad rss-counter state mm:000000005e08f165 type:MM_ANONPAGES val:22 Warning: Permanently added '[localhost]:57280' (ECDSA) to the list of known hosts. 2023/06/21 10:18:09 fuzzer started 2023/06/21 10:18:09 dialing manager at localhost:36067 2023/06/21 10:18:09 checking machine... 2023/06/21 10:18:09 checking revisions... [ 35.623543] kmemleak: Automatic memory scanning thread ended 2023/06/21 10:18:10 testing simple program... [ 35.668555] cgroup: Unknown subsys name 'net' [ 35.734452] cgroup: Unknown subsys name 'rlimit' executing program executing program executing program VM DIAGNOSIS: 10:18:09 Registers: info registers vcpu 0 RAX=ffffc90000660000 RBX=ffff8880095a8000 RCX=0000000000000100 RDX=1ffff110012b5208 RSI=ffffffff83018a8f RDI=000000000000000a RBP=0000000000000083 RSP=ffff88806ce09d70 R8 =0000000000000001 R9 =0000000000000000 R10=0000000000000001 R11=0000000000000000 R12=dffffc0000000000 R13=ffff888008476800 R14=ffff8880095a9040 R15=000000000000000a RIP=ffffffff83018ab7 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 0000000000000000 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=00007f036dffd690 CR3=000000000cbe4000 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=38313a3031203132206e754a3e36383c XMM01=7365733a646873732878696e755f6d61 XMM02=736f6c63206e6f6973736573203a296e XMM03=5f6d6170203a5d3932325b6468737320 XMM04=6456774875434142334f726f59427469 XMM05=485320415352203a3268737320343239 XMM06=206d6f726620746f6f7220726f662079 XMM07=00000000000000000000000000000000 XMM08=3a677562656420676f6c737973720000 XMM09=00000000000000000000000000000000 XMM10=00000000000000000000000000000000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000 info registers vcpu 1 RAX=ffff88806cf35000 RBX=0000000000000001 RCX=ffffffff8451250e RDX=ffffed100d9e6a01 RSI=0000000000000004 RDI=ffffffff81288ac5 RBP=dffffc0000000000 RSP=ffff888008e07e70 R8 =0000000000000000 R9 =ffffed100d9e6a00 R10=ffff88806cf35003 R11=ffff888008c04400 R12=ffffffff85d3d350 R13=1ffff110011c0fd3 R14=0000000000000000 R15=0000000000000000 RIP=ffffffff8451349f 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=00007f55ce76d328 CR3=0000000005482000 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=652022746f6f72223d74636361207469 XMM02=3d6c616e696d72657420322e322e302e XMM03=3d656d616e74736f682022646873732f XMM04=40404040404040404040404040404040 XMM05=5a5a5a5a5a5a5a5a5a5a5a5a5a5a5a5a XMM06=20202020202020202020202020202020 XMM07=00000000000000000000000000000000 XMM08=652075253d64692073253d706f000000 XMM09=00000000000000000000000000000000 XMM10=00000000000000000000000000000000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000