syzkaller login: [ 38.801793] BUG: Bad rss-counter state mm:0000000061f48f0e type:MM_FILEPAGES val:33 [ 38.803186] BUG: Bad rss-counter state mm:0000000061f48f0e type:MM_ANONPAGES val:22 [ 38.891507] ================================================================== [ 38.892384] BUG: KASAN: slab-use-after-free in vma_interval_tree_remove+0xc75/0xec0 [ 38.893296] Read of size 8 at addr ffff888018c08d08 by task sshd/220 [ 38.894064] [ 38.894283] CPU: 1 PID: 220 Comm: sshd Not tainted 6.4.0-rc7-next-20230619 #1 [ 38.895271] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS 1.12.0-1 04/01/2014 [ 38.896365] Call Trace: [ 38.896697] [ 38.896993] dump_stack_lvl+0x91/0xf0 [ 38.897485] print_report+0xcc/0x620 [ 38.898014] ? __virt_addr_valid+0x102/0x340 [ 38.898572] ? vma_interval_tree_remove+0xc75/0xec0 [ 38.899198] ? vma_interval_tree_remove+0xc75/0xec0 [ 38.899816] kasan_report+0xbe/0xf0 [ 38.900295] ? vma_interval_tree_remove+0xc75/0xec0 [ 38.900917] vma_interval_tree_remove+0xc75/0xec0 [ 38.901528] vma_prepare+0xc54/0x11a0 [ 38.902013] __split_vma+0x5af/0x950 [ 38.902492] ? __pfx___split_vma+0x10/0x10 [ 38.903022] ? find_held_lock+0x2c/0x110 [ 38.903545] do_vmi_align_munmap+0x2ba/0x11f0 [ 38.904120] ? lock_is_held_type+0x9f/0x120 [ 38.904664] ? __pfx_do_vmi_align_munmap+0x10/0x10 [ 38.905281] ? mtree_range_walk+0x632/0x900 [ 38.905858] ? mas_walk+0x5c7/0x7c0 [ 38.906341] do_vmi_munmap+0x1f1/0x2b0 [ 38.906838] mmap_region+0x1f9/0x2660 [ 38.907319] ? vm_mmap_pgoff+0x15c/0x3a0 [ 38.907837] ? __pfx_arch_get_unmapped_area_topdown+0x10/0x10 [ 38.908549] ? __pfx_lock_acquire+0x10/0x10 [ 38.909088] ? __pfx_mmap_region+0x10/0x10 [ 38.909652] ? security_mmap_addr+0x7d/0xa0 [ 38.910189] ? get_unmapped_area+0x1f5/0x3f0 [ 38.910740] do_mmap+0x854/0xf00 [ 38.911180] vm_mmap_pgoff+0x1a6/0x3a0 [ 38.911680] ? __pfx_vm_mmap_pgoff+0x10/0x10 [ 38.912252] ksys_mmap_pgoff+0x3af/0x500 [ 38.912764] do_syscall_64+0x3f/0x90 [ 38.913254] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 38.913917] RIP: 0033:0x7f8af5dc2d82 [ 38.914376] 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 [ 38.916502] RSP: 002b:00007ffe9c323618 EFLAGS: 00000206 ORIG_RAX: 0000000000000009 [ 38.917414] RAX: ffffffffffffffda RBX: 0000000000000812 RCX: 00007f8af5dc2d82 [ 38.918293] RDX: 0000000000000005 RSI: 0000000000001000 RDI: 00007f8af51fc000 [ 38.919145] RBP: 00007f8af51fc000 R08: 0000000000000009 R09: 0000000000001000 [ 38.919995] R10: 0000000000000812 R11: 0000000000000206 R12: 000055cb95769ec0 [ 38.920846] R13: 00007ffe9c323630 R14: 00007ffe9c323660 R15: 00007ffe9c3239c0 [ 38.921706] [ 38.921999] [ 38.922217] Allocated by task 213: [ 38.922651] kasan_save_stack+0x22/0x50 [ 38.923160] kasan_set_track+0x25/0x30 [ 38.923664] __kasan_slab_alloc+0x59/0x70 [ 38.924186] kmem_cache_alloc+0x16b/0x370 [ 38.924708] vm_area_dup+0x20/0x160 [ 38.925168] __split_vma+0x170/0x950 [ 38.925650] split_vma+0xc6/0x110 [ 38.926101] mprotect_fixup+0x8d2/0xb30 [ 38.926628] do_mprotect_pkey+0x87e/0xd40 [ 38.927173] __x64_sys_mprotect+0x78/0xc0 [ 38.927713] do_syscall_64+0x3f/0x90 [ 38.928198] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 38.928874] [ 38.929097] Freed by task 213: [ 38.929526] kasan_save_stack+0x22/0x50 [ 38.930051] kasan_set_track+0x25/0x30 [ 38.930561] kasan_save_free_info+0x2b/0x50 [ 38.931118] __kasan_slab_free+0x10a/0x190 [ 38.931681] kmem_cache_free+0x10d/0x4d0 [ 38.932212] rcu_core+0x8c8/0x2860 [ 38.932669] __do_softirq+0x1b7/0x7d4 [ 38.933171] [ 38.933395] Last potentially related work creation: [ 38.934026] kasan_save_stack+0x22/0x50 [ 38.934551] __kasan_record_aux_stack+0x8e/0xa0 [ 38.935143] __call_rcu_common.constprop.0+0x6a/0xb90 [ 38.935811] remove_vma+0x139/0x170 [ 38.936349] do_vmi_align_munmap+0xd4a/0x11f0 [ 38.936930] do_vmi_munmap+0x1f1/0x2b0 [ 38.937441] __vm_munmap+0x138/0x3a0 [ 38.937938] __x64_sys_munmap+0x59/0x80 [ 38.938460] do_syscall_64+0x3f/0x90 [ 38.938945] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 38.939608] [ 38.939838] The buggy address belongs to the object at ffff888018c08cb0 [ 38.939838] which belongs to the cache vm_area_struct of size 168 [ 38.941386] The buggy address is located 88 bytes inside of [ 38.941386] freed 168-byte region [ffff888018c08cb0, ffff888018c08d58) [ 38.942873] [ 38.943098] The buggy address belongs to the physical page: [ 38.943790] page:00000000a08fe007 refcount:1 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0x18c08 [ 38.944938] memcg:ffff888019c28701 [ 38.945383] flags: 0x100000000000200(slab|node=0|zone=1) [ 38.946069] page_type: 0xffffffff() [ 38.946528] raw: 0100000000000200 ffff88800879fc80 dead000000000100 dead000000000122 [ 38.947467] raw: 0000000000000000 0000000000110011 00000001ffffffff ffff888019c28701 [ 38.948415] page dumped because: kasan: bad access detected [ 38.949108] [ 38.949328] Memory state around the buggy address: [ 38.949951] ffff888018c08c00: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fc fc [ 38.950836] ffff888018c08c80: fc fc fc fc fc fc fa fb fb fb fb fb fb fb fb fb [ 38.951722] >ffff888018c08d00: fb fb fb fb fb fb fb fb fb fb fb fc fc fc fc fc [ 38.952636] ^ [ 38.953097] ffff888018c08d80: fc fc fc 00 00 00 00 00 00 00 00 00 00 00 00 00 [ 38.954009] ffff888018c08e00: 00 00 00 00 00 00 00 00 fc fc fc fc fc fc fc fc [ 38.954892] ================================================================== [ 38.955838] Disabling lock debugging due to kernel taint [ 41.559676] BUG: Bad rss-counter state mm:000000004f396ba7 type:MM_FILEPAGES val:33 [ 41.560919] BUG: Bad rss-counter state mm:000000004f396ba7 type:MM_ANONPAGES val:22 [ 42.061834] BUG: Bad rss-counter state mm:0000000069d9c23c type:MM_FILEPAGES val:33 [ 42.063033] BUG: Bad rss-counter state mm:0000000069d9c23c type:MM_ANONPAGES val:22 Warning: Permanently added '[localhost]:53908' (ECDSA) to the list of known hosts. 2023/06/19 20:06:43 fuzzer started 2023/06/19 20:06:43 dialing manager at localhost:44161 2023/06/19 20:06:43 checking machine... 2023/06/19 20:06:43 checking revisions... [ 42.683254] kmemleak: Automatic memory scanning thread ended 2023/06/19 20:06:43 testing simple program... [ 42.736292] cgroup: Unknown subsys name 'net' [ 42.798414] cgroup: Unknown subsys name 'rlimit' executing program executing program executing program VM DIAGNOSIS: 20:06:43 Registers: info registers vcpu 0 RAX=0000000000000001 RBX=ffff88800e747848 RCX=0000000000000001 RDX=1ffff11001ce8f14 RSI=ffff88800e747e50 RDI=ffffffff8363dca7 RBP=ffff88800e7478a0 RSP=ffff88800e747830 R8 =0000000000000001 R9 =ffff88800e747888 R10=0000000000038001 R11=000000000008a8f2 R12=ffff88800e747910 R13=0000000000000000 R14=ffff88800d9e3680 R15=0000000000092cc0 RIP=ffffffff81130399 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 00007ff6eecde900 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=00007ff6ef2960b0 CR3=000000000e466000 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=25252525252525252525252525252525 XMM01=000000000000000000000000000000ff XMM02=000000000000000000000000000000ff XMM03=5320444f4854454d5f54505952434e45 XMM04=40404040404040404040404040404040 XMM05=5a5a5a5a5a5a5a5a5a5a5a5a5a5a5a5a XMM06=20202020202020202020202020202020 XMM07=00000000000000000000000000000000 XMM08=662079726f6d656d20666f2074756f00 XMM09=00000000000000000000000000000000 XMM10=00000000000000000000000000000000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000 info registers vcpu 1 RAX=ffffffff812889a5 RBX=0000000000000001 RCX=ffffffff864b1a01 RDX=ffff88806cf09a98 RSI=ffffffff812889a5 RDI=ffff88806cf09a50 RBP=ffff88806cf09aa8 RSP=ffff88806cf099e0 R8 =ffffffff864b1a38 R9 =ffff88806cf09a90 R10=0000000000038001 R11=00000000000b53b8 R12=ffff88806cf09b18 R13=ffff88806cf09a98 R14=ffff888008d751c0 R15=ffff88806cf09a50 RIP=ffffffff81130641 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 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=00007ff6ef293650 CR3=000000000f168000 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=246e417365363d91b4411f42515471c2 XMM02=ec2efd57dc4c00df000000000011cff8 XMM03=90fb3bd15824d35b000000000011d0c8 XMM04=8c139ac729facfb100000000000ae988 XMM05=59d5b690e0af863b0000000000133fb0 XMM06=cf2a732ada1c91b400000000001326b0 XMM07=e042d86d42eb936e0000000000123f60 XMM08=90fb3bd15824d35b000000000011d0c8 XMM09=00000000000000000000000000000000 XMM10=20200000000020202020202020200000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000