syzkaller login: [ 30.090915] BUG: Bad rss-counter state mm:0000000093cddd65 type:MM_FILEPAGES val:33 [ 30.092086] BUG: Bad rss-counter state mm:0000000093cddd65 type:MM_ANONPAGES val:22 [ 30.228874] ================================================================== [ 30.229827] BUG: KASAN: slab-use-after-free in vma_interval_tree_remove+0xc75/0xec0 [ 30.230750] Read of size 8 at addr ffff888017a20228 by task sshd/220 [ 30.231507] [ 30.231724] CPU: 1 PID: 220 Comm: sshd Not tainted 6.4.0-rc7-next-20230620 #1 [ 30.232683] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS 1.12.0-1 04/01/2014 [ 30.233690] Call Trace: [ 30.234008] [ 30.234294] dump_stack_lvl+0x91/0xf0 [ 30.234787] print_report+0xcc/0x620 [ 30.235281] ? __virt_addr_valid+0x102/0x340 [ 30.235826] ? vma_interval_tree_remove+0xc75/0xec0 [ 30.236441] ? vma_interval_tree_remove+0xc75/0xec0 [ 30.237048] kasan_report+0xbe/0xf0 [ 30.237539] ? vma_interval_tree_remove+0xc75/0xec0 [ 30.238154] vma_interval_tree_remove+0xc75/0xec0 [ 30.238752] vma_prepare+0xc54/0x11a0 [ 30.239228] __split_vma+0x5af/0x950 [ 30.239697] ? __pfx___split_vma+0x10/0x10 [ 30.240223] ? mark_lock.part.0+0xef/0x2f50 [ 30.240756] do_vmi_align_munmap+0x2ba/0x11f0 [ 30.241318] ? lock_is_held_type+0x9f/0x120 [ 30.241859] ? __pfx_do_vmi_align_munmap+0x10/0x10 [ 30.242460] ? mtree_range_walk+0x632/0x900 [ 30.243009] ? mas_walk+0x5c7/0x7c0 [ 30.243481] do_vmi_munmap+0x1f1/0x2b0 [ 30.243976] mmap_region+0x1f9/0x2660 [ 30.244459] ? vm_mmap_pgoff+0x15c/0x3a0 [ 30.244977] ? __pfx_arch_get_unmapped_area_topdown+0x10/0x10 [ 30.245696] ? __pfx_lock_acquire+0x10/0x10 [ 30.246231] ? __pfx_mmap_region+0x10/0x10 [ 30.246759] ? security_mmap_addr+0x7d/0xa0 [ 30.247293] ? get_unmapped_area+0x1f5/0x3f0 [ 30.247842] do_mmap+0x854/0xf00 [ 30.248277] vm_mmap_pgoff+0x1a6/0x3a0 [ 30.248765] ? __pfx_vm_mmap_pgoff+0x10/0x10 [ 30.249329] ksys_mmap_pgoff+0x3af/0x500 [ 30.249848] do_syscall_64+0x3f/0x90 [ 30.250334] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 30.250979] RIP: 0033:0x7fd59f8f9d82 [ 30.251436] 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 [ 30.253559] RSP: 002b:00007ffe93c56168 EFLAGS: 00000206 ORIG_RAX: 0000000000000009 [ 30.254481] RAX: ffffffffffffffda RBX: 0000000000000812 RCX: 00007fd59f8f9d82 [ 30.255333] RDX: 0000000000000005 RSI: 0000000000001000 RDI: 00007fd59ed33000 [ 30.256199] RBP: 00007fd59ed33000 R08: 0000000000000009 R09: 0000000000001000 [ 30.257060] R10: 0000000000000812 R11: 0000000000000206 R12: 00005587c7c74f70 [ 30.257922] R13: 00007ffe93c56180 R14: 00007ffe93c561b0 R15: 00007ffe93c56510 [ 30.258786] [ 30.259078] [ 30.259300] Allocated by task 213: [ 30.259729] kasan_save_stack+0x22/0x50 [ 30.260234] kasan_set_track+0x25/0x30 [ 30.260734] __kasan_slab_alloc+0x59/0x70 [ 30.261257] kmem_cache_alloc+0x16b/0x370 [ 30.261791] vm_area_dup+0x20/0x160 [ 30.262252] __split_vma+0x170/0x950 [ 30.262724] split_vma+0xc6/0x110 [ 30.263162] mprotect_fixup+0x8d2/0xb30 [ 30.263665] do_mprotect_pkey+0x87e/0xd40 [ 30.264188] __x64_sys_mprotect+0x78/0xc0 [ 30.264708] do_syscall_64+0x3f/0x90 [ 30.265180] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 30.265835] [ 30.266057] Freed by task 19: [ 30.266434] kasan_save_stack+0x22/0x50 [ 30.266936] kasan_set_track+0x25/0x30 [ 30.267425] kasan_save_free_info+0x2b/0x50 [ 30.267960] __kasan_slab_free+0x10a/0x190 [ 30.268491] kmem_cache_free+0x10d/0x4d0 [ 30.269004] rcu_core+0x8c8/0x2860 [ 30.269451] __do_softirq+0x1b7/0x7d4 [ 30.269957] [ 30.270172] Last potentially related work creation: [ 30.270774] kasan_save_stack+0x22/0x50 [ 30.271284] __kasan_record_aux_stack+0x8e/0xa0 [ 30.271856] __call_rcu_common.constprop.0+0x6a/0xb90 [ 30.272490] remove_vma+0x139/0x170 [ 30.272941] do_vmi_align_munmap+0xd4a/0x11f0 [ 30.273499] do_vmi_munmap+0x1f1/0x2b0 [ 30.273985] __vm_munmap+0x138/0x3a0 [ 30.274503] __x64_sys_munmap+0x59/0x80 [ 30.275000] do_syscall_64+0x3f/0x90 [ 30.275472] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 30.276128] [ 30.276340] The buggy address belongs to the object at ffff888017a201d0 [ 30.276340] which belongs to the cache vm_area_struct of size 168 [ 30.277819] The buggy address is located 88 bytes inside of [ 30.277819] freed 168-byte region [ffff888017a201d0, ffff888017a20278) [ 30.279221] [ 30.279441] The buggy address belongs to the physical page: [ 30.280091] page:00000000187b63e4 refcount:1 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0x17a20 [ 30.281174] memcg:ffff88800e0fb801 [ 30.281604] flags: 0x100000000000200(slab|node=0|zone=1) [ 30.282243] page_type: 0xffffffff() [ 30.282696] raw: 0100000000000200 ffff8880087a0c80 dead000000000122 0000000000000000 [ 30.283616] raw: 0000000000000000 0000000000110011 00000001ffffffff ffff88800e0fb801 [ 30.284513] page dumped because: kasan: bad access detected [ 30.285171] [ 30.285387] Memory state around the buggy address: [ 30.286000] ffff888017a20100: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 [ 30.286908] ffff888017a20180: 00 00 fc fc fc fc fc fc fc fc fa fb fb fb fb fb [ 30.287784] >ffff888017a20200: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fc [ 30.288664] ^ [ 30.289240] ffff888017a20280: fc fc fc fc fc fc fc fa fb fb fb fb fb fb fb fb [ 30.290162] ffff888017a20300: fb fb fb fb fb fb fb fb fb fb fb fb fc fc fc fc [ 30.291037] ================================================================== [ 30.292092] Disabling lock debugging due to kernel taint [ 33.006888] BUG: Bad rss-counter state mm:00000000b629d14e type:MM_FILEPAGES val:33 [ 33.007886] BUG: Bad rss-counter state mm:00000000b629d14e type:MM_ANONPAGES val:22 [ 33.576799] BUG: Bad rss-counter state mm:00000000f2f598d9 type:MM_FILEPAGES val:33 [ 33.577966] BUG: Bad rss-counter state mm:00000000f2f598d9 type:MM_ANONPAGES val:22 Warning: Permanently added '[localhost]:28705' (ECDSA) to the list of known hosts. 2023/06/21 07:51:22 fuzzer started 2023/06/21 07:51:22 dialing manager at localhost:36067 2023/06/21 07:51:22 checking machine... 2023/06/21 07:51:22 checking revisions... [ 34.202417] kmemleak: Automatic memory scanning thread ended 2023/06/21 07:51:23 testing simple program... [ 34.244078] cgroup: Unknown subsys name 'net' [ 34.298191] cgroup: Unknown subsys name 'rlimit' executing program executing program executing program VM DIAGNOSIS: 07:51:22 Registers: info registers vcpu 0 RAX=ffff88806ce35000 RBX=0000000000000000 RCX=ffffffff8451250e RDX=ffffed100d9c6a01 RSI=0000000000000004 RDI=ffffffff81288ac5 RBP=dffffc0000000000 RSP=ffffffff85407e10 R8 =0000000000000000 R9 =ffffed100d9c6a00 R10=ffff88806ce35003 R11=0000000000000001 R12=ffffffff85d3d350 R13=1ffffffff0a80fc7 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 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=00007f46d18000a4 CR3=0000000005482000 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=00000000000000000000000000000000 XMM01=00007f46d1ccb51000005635c740b790 XMM02=6f6974707972636e6561737268746977 XMM03=00000000000000000000000000777074 XMM04=40404040404040404040404040404040 XMM05=5a5a5a5a5a5a5a5a5a5a5a5a5a5a5a5a XMM06=20202020202020202020202020202020 XMM07=ffffffffffff00ffffff00ffffff00ff XMM08=00002000000000202020002020200000 XMM09=ffffffffffff00ffffff00ffffff00ff XMM10=00002000000000202020002020200000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000 info registers vcpu 1 RAX=1ffffffff0c09d7b RBX=ffffffff8604ebdc RCX=ffffffff8450cc7e RDX=0000000000000000 RSI=ffffffff864b2008 RDI=ffffffff8604ebc4 RBP=ffffffff8604ebc4 RSP=ffff88800ebdf9e8 R8 =ffffffff864b2008 R9 =ffff88800ebdfae0 R10=0000000000038001 R11=00000000000b5080 R12=ffffffff8604ebf4 R13=ffffffff8604ebc4 R14=ffffffff8604ebc4 R15=dffffc0000000000 RIP=ffffffff8112fc7f RFL=00000217 [----APC] 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 00007f50c5030900 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=00007ffc3c5ec000 CR3=000000000f0e8000 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=00ff0000000000000000000000000000 XMM02=2f00646f6874656d5f74707972636e65 XMM03=5320444f4854454d5f54505952434e45 XMM04=40404040404040404040404040404040 XMM05=5a5a5a5a5a5a5a5a5a5a5a5a5a5a5a5a XMM06=20202020202020202020202020202020 XMM07=ff00ffffffffffffffffffffffffffff XMM08=20002020202020200020202020202020 XMM09=0000ffffffffffffffffffffffffffff XMM10=00002020202020200020202020202020 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000