syzkaller login: [ 31.725198] BUG: Bad rss-counter state mm:000000008e586ec1 type:MM_FILEPAGES val:33 [ 31.726908] BUG: Bad rss-counter state mm:000000008e586ec1 type:MM_ANONPAGES val:22 [ 31.896340] ================================================================== [ 31.897361] BUG: KASAN: slab-use-after-free in vma_interval_tree_remove+0xc75/0xec0 [ 31.898385] Read of size 8 at addr ffff88800ff49a50 by task sshd/220 [ 31.899335] [ 31.899590] CPU: 1 PID: 220 Comm: sshd Not tainted 6.4.0-rc7-next-20230620 #1 [ 31.900514] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS 1.12.0-1 04/01/2014 [ 31.901569] Call Trace: [ 31.901924] [ 31.902239] dump_stack_lvl+0x91/0xf0 [ 31.902777] print_report+0xcc/0x620 [ 31.903308] ? __virt_addr_valid+0x102/0x340 [ 31.903899] ? vma_interval_tree_remove+0xc75/0xec0 [ 31.904592] ? vma_interval_tree_remove+0xc75/0xec0 [ 31.905271] kasan_report+0xbe/0xf0 [ 31.905799] ? vma_interval_tree_remove+0xc75/0xec0 [ 31.906490] vma_interval_tree_remove+0xc75/0xec0 [ 31.907164] vma_prepare+0xc54/0x11a0 [ 31.907713] __split_vma+0x5af/0x950 [ 31.908216] ? __pfx___split_vma+0x10/0x10 [ 31.908805] ? find_held_lock+0x2c/0x110 [ 31.909385] do_vmi_align_munmap+0x2ba/0x11f0 [ 31.909994] ? lock_is_held_type+0x9f/0x120 [ 31.910578] ? __pfx_do_vmi_align_munmap+0x10/0x10 [ 31.911226] ? mtree_range_walk+0x632/0x900 [ 31.911813] ? mas_walk+0x5c7/0x7c0 [ 31.912330] do_vmi_munmap+0x1f1/0x2b0 [ 31.912858] mmap_region+0x1f9/0x2660 [ 31.913373] ? vm_mmap_pgoff+0x15c/0x3a0 [ 31.913920] ? __pfx_arch_get_unmapped_area_topdown+0x10/0x10 [ 31.914702] ? __pfx_lock_acquire+0x10/0x10 [ 31.915268] ? __pfx_mmap_region+0x10/0x10 [ 31.915851] ? security_mmap_addr+0x7d/0xa0 [ 31.916437] ? get_unmapped_area+0x1f5/0x3f0 [ 31.917024] do_mmap+0x854/0xf00 [ 31.917493] vm_mmap_pgoff+0x1a6/0x3a0 [ 31.918020] ? __pfx_vm_mmap_pgoff+0x10/0x10 [ 31.918639] ksys_mmap_pgoff+0x3af/0x500 [ 31.919182] do_syscall_64+0x3f/0x90 [ 31.919691] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 31.920381] RIP: 0033:0x7f55cef03d82 [ 31.920868] 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 [ 31.923156] RSP: 002b:00007ffe52660ce8 EFLAGS: 00000206 ORIG_RAX: 0000000000000009 [ 31.924119] RAX: ffffffffffffffda RBX: 0000000000000812 RCX: 00007f55cef03d82 [ 31.925021] RDX: 0000000000000005 RSI: 0000000000001000 RDI: 00007f55ce33d000 [ 31.925923] RBP: 00007f55ce33d000 R08: 0000000000000009 R09: 0000000000001000 [ 31.926836] R10: 0000000000000812 R11: 0000000000000206 R12: 00005600a2698f60 [ 31.927742] R13: 00007ffe52660d00 R14: 00007ffe52660d30 R15: 00007ffe52661090 [ 31.928655] [ 31.928966] [ 31.929199] Allocated by task 213: [ 31.929661] kasan_save_stack+0x22/0x50 [ 31.930215] kasan_set_track+0x25/0x30 [ 31.930742] __kasan_slab_alloc+0x59/0x70 [ 31.931304] kmem_cache_alloc+0x16b/0x370 [ 31.931850] vm_area_dup+0x20/0x160 [ 31.932332] __split_vma+0x170/0x950 [ 31.932830] split_vma+0xc6/0x110 [ 31.933302] mprotect_fixup+0x8d2/0xb30 [ 31.933836] do_mprotect_pkey+0x87e/0xd40 [ 31.934394] __x64_sys_mprotect+0x78/0xc0 [ 31.934950] do_syscall_64+0x3f/0x90 [ 31.935457] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 31.936144] [ 31.936376] Freed by task 213: [ 31.936792] kasan_save_stack+0x22/0x50 [ 31.937329] kasan_set_track+0x25/0x30 [ 31.937857] kasan_save_free_info+0x2b/0x50 [ 31.938441] __kasan_slab_free+0x10a/0x190 [ 31.939007] kmem_cache_free+0x10d/0x4d0 [ 31.939553] rcu_core+0x8c8/0x2860 [ 31.940027] __do_softirq+0x1b7/0x7d4 [ 31.940588] [ 31.940817] Last potentially related work creation: [ 31.941439] kasan_save_stack+0x22/0x50 [ 31.941975] __kasan_record_aux_stack+0x8e/0xa0 [ 31.942600] __call_rcu_common.constprop.0+0x6a/0xb90 [ 31.943281] remove_vma+0x139/0x170 [ 31.943759] do_vmi_align_munmap+0xd4a/0x11f0 [ 31.944354] do_vmi_munmap+0x1f1/0x2b0 [ 31.944871] __vm_munmap+0x138/0x3a0 [ 31.945366] __x64_sys_munmap+0x59/0x80 [ 31.945895] do_syscall_64+0x3f/0x90 [ 31.946416] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 31.947105] [ 31.947336] The buggy address belongs to the object at ffff88800ff499f8 [ 31.947336] which belongs to the cache vm_area_struct of size 168 [ 31.948904] The buggy address is located 88 bytes inside of [ 31.948904] freed 168-byte region [ffff88800ff499f8, ffff88800ff49aa0) [ 31.950397] [ 31.950627] The buggy address belongs to the physical page: [ 31.951323] page:000000007dd77389 refcount:1 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0xff49 [ 31.952480] memcg:ffff88800ec9fc01 [ 31.952932] flags: 0x100000000000200(slab|node=0|zone=1) [ 31.953618] page_type: 0xffffffff() [ 31.954108] raw: 0100000000000200 ffff8880087a0c80 dead000000000122 0000000000000000 [ 31.955088] raw: 0000000000000000 0000000000110011 00000001ffffffff ffff88800ec9fc01 [ 31.956054] page dumped because: kasan: bad access detected [ 31.956758] [ 31.956988] Memory state around the buggy address: [ 31.957614] ffff88800ff49900: fc fc 00 00 00 00 00 00 00 00 00 00 00 00 00 00 [ 31.958636] ffff88800ff49980: 00 00 00 00 00 00 00 fc fc fc fc fc fc fc fc fa [ 31.959550] >ffff88800ff49a00: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb [ 31.960454] ^ [ 31.961203] ffff88800ff49a80: fb fb fb fb fc fc fc fc fc fc fc fc fa fb fb fb [ 31.962121] ffff88800ff49b00: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb [ 31.963023] ================================================================== [ 31.964073] Disabling lock debugging due to kernel taint [ 34.242060] BUG: Bad rss-counter state mm:0000000058aac129 type:MM_FILEPAGES val:33 [ 34.243288] BUG: Bad rss-counter state mm:0000000058aac129 type:MM_ANONPAGES val:22 [ 34.660159] BUG: Bad rss-counter state mm:000000001187424e type:MM_FILEPAGES val:33 [ 34.661178] BUG: Bad rss-counter state mm:000000001187424e type:MM_ANONPAGES val:22 Warning: Permanently added '[localhost]:15896' (ECDSA) to the list of known hosts. 2023/06/20 21:28:10 fuzzer started 2023/06/20 21:28:11 dialing manager at localhost:36067 2023/06/20 21:28:11 checking machine... 2023/06/20 21:28:11 checking revisions... [ 35.432247] kmemleak: Automatic memory scanning thread ended 2023/06/20 21:28:11 testing simple program... [ 35.483546] cgroup: Unknown subsys name 'net' [ 35.534082] cgroup: Unknown subsys name 'rlimit' executing program executing program executing program VM DIAGNOSIS: 21:28:10 Registers: info registers vcpu 0 RAX=0000000000000000 RBX=ffffea0000591240 RCX=0000000000000100 RDX=ffff8880087a0500 RSI=ffffffff811431c2 RDI=0000777f80000000 RBP=0000000000000000 RSP=ffff88806ce09db0 R8 =0000000000000001 R9 =0000000000000000 R10=0000000000000008 R11=0000000000000000 R12=ffffffff81213110 R13=ffff88806ce09ee8 R14=ffff88806ce35000 R15=ffff88800e619680 RIP=ffffffff8180c61b RFL=00000282 [--S----] 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=00007ffcbbe03f88 CR3=000000000f826000 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=2030313a38323a3132203032206e754a XMM01=657463656e6e6f63736944203a5d3932 XMM02=302e303120746f6f722072657375206d XMM03=203a5d3932325b646873732072656c6c XMM04=69662068637573206f4e203a656c6163 XMM05=3a656c696620766e65206e65706f206f XMM06=65733a6468737328766e655f6d617020 XMM07=6b7a79732030313a38323a3132203032 XMM08=3d656e696c646d632022656369767265 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=00007f5af8682fc0 CR3=000000000f826000 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=38323a3132203032206e754a3e36383c XMM01=7365733a646873732878696e755f6d61 XMM02=736f6c63206e6f6973736573203a296e XMM03=5f6d6170203a5d3932325b6468737320 XMM04=6456774875434142334f726f59427469 XMM05=485320415352203a3268737320323630 XMM06=206d6f726620746f6f7220726f662079 XMM07=00000000000000000000000000000000 XMM08=3a677562656420676f6c737973720000 XMM09=00000000000000000000000000000000 XMM10=00000000000000000000000000000000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000