syzkaller login: [ 34.014600] BUG: Bad rss-counter state mm:00000000a8245ea1 type:MM_FILEPAGES val:33 [ 34.015551] BUG: Bad rss-counter state mm:00000000a8245ea1 type:MM_ANONPAGES val:22 [ 34.173846] ================================================================== [ 34.174706] BUG: KASAN: slab-use-after-free in vma_interval_tree_remove+0xc75/0xec0 [ 34.175595] Read of size 8 at addr ffff888017b6f228 by task sshd/226 [ 34.176320] [ 34.176529] CPU: 1 PID: 226 Comm: sshd Not tainted 6.4.0-rc7-next-20230619 #1 [ 34.177532] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS 1.12.0-1 04/01/2014 [ 34.178451] Call Trace: [ 34.178754] [ 34.179025] dump_stack_lvl+0x91/0xf0 [ 34.179495] print_report+0xcc/0x620 [ 34.179960] ? __virt_addr_valid+0x102/0x340 [ 34.180483] ? vma_interval_tree_remove+0xc75/0xec0 [ 34.181088] ? vma_interval_tree_remove+0xc75/0xec0 [ 34.181677] kasan_report+0xbe/0xf0 [ 34.182133] ? vma_interval_tree_remove+0xc75/0xec0 [ 34.182726] vma_interval_tree_remove+0xc75/0xec0 [ 34.183296] vma_prepare+0xc54/0x11a0 [ 34.183754] __split_vma+0x5af/0x950 [ 34.184206] ? __pfx___split_vma+0x10/0x10 [ 34.184731] ? find_held_lock+0x2c/0x110 [ 34.185271] do_vmi_align_munmap+0x2ba/0x11f0 [ 34.185829] ? lock_is_held_type+0x9f/0x120 [ 34.186373] ? __pfx_do_vmi_align_munmap+0x10/0x10 [ 34.186986] ? mtree_range_walk+0x632/0x900 [ 34.187531] ? mas_walk+0x5c7/0x7c0 [ 34.188001] do_vmi_munmap+0x1f1/0x2b0 [ 34.188492] mmap_region+0x1f9/0x2660 [ 34.188980] ? vm_mmap_pgoff+0x15c/0x3a0 [ 34.189498] ? __pfx_arch_get_unmapped_area_topdown+0x10/0x10 [ 34.190213] ? __pfx_lock_acquire+0x10/0x10 [ 34.190756] ? __pfx_mmap_region+0x10/0x10 [ 34.191288] ? security_mmap_addr+0x7d/0xa0 [ 34.191823] ? get_unmapped_area+0x1f5/0x3f0 [ 34.192379] do_mmap+0x854/0xf00 [ 34.192819] vm_mmap_pgoff+0x1a6/0x3a0 [ 34.193337] ? __pfx_vm_mmap_pgoff+0x10/0x10 [ 34.193900] ksys_mmap_pgoff+0x3af/0x500 [ 34.194403] do_syscall_64+0x3f/0x90 [ 34.194880] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 34.195533] RIP: 0033:0x7f4a49aedd82 [ 34.195994] 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 [ 34.198147] RSP: 002b:00007ffe19eebff8 EFLAGS: 00000206 ORIG_RAX: 0000000000000009 [ 34.199062] RAX: ffffffffffffffda RBX: 0000000000000812 RCX: 00007f4a49aedd82 [ 34.199924] RDX: 0000000000000005 RSI: 0000000000001000 RDI: 00007f4a48f27000 [ 34.200772] RBP: 00007f4a48f27000 R08: 0000000000000009 R09: 0000000000001000 [ 34.201638] R10: 0000000000000812 R11: 0000000000000206 R12: 000055ef65f96d90 [ 34.202487] R13: 00007ffe19eec010 R14: 00007ffe19eec040 R15: 00007ffe19eec3a0 [ 34.203347] [ 34.203636] [ 34.203855] Allocated by task 219: [ 34.204282] kasan_save_stack+0x22/0x50 [ 34.204793] kasan_set_track+0x25/0x30 [ 34.205306] __kasan_slab_alloc+0x59/0x70 [ 34.205833] kmem_cache_alloc+0x16b/0x370 [ 34.206353] vm_area_dup+0x20/0x160 [ 34.206812] __split_vma+0x170/0x950 [ 34.207279] split_vma+0xc6/0x110 [ 34.207715] mprotect_fixup+0x8d2/0xb30 [ 34.208227] do_mprotect_pkey+0x87e/0xd40 [ 34.208743] __x64_sys_mprotect+0x78/0xc0 [ 34.209273] do_syscall_64+0x3f/0x90 [ 34.209762] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 34.210393] [ 34.210610] Freed by task 219: [ 34.211003] kasan_save_stack+0x22/0x50 [ 34.211504] kasan_set_track+0x25/0x30 [ 34.212005] kasan_save_free_info+0x2b/0x50 [ 34.212538] __kasan_slab_free+0x10a/0x190 [ 34.213075] kmem_cache_free+0x10d/0x4d0 [ 34.213589] rcu_core+0x8c8/0x2860 [ 34.214032] __do_softirq+0x1b7/0x7d4 [ 34.214507] [ 34.214727] Last potentially related work creation: [ 34.215310] kasan_save_stack+0x22/0x50 [ 34.215821] __kasan_record_aux_stack+0x8e/0xa0 [ 34.216400] __call_rcu_common.constprop.0+0x6a/0xb90 [ 34.217052] remove_vma+0x139/0x170 [ 34.217508] do_vmi_align_munmap+0xd4a/0x11f0 [ 34.218133] do_vmi_munmap+0x1f1/0x2b0 [ 34.218621] __vm_munmap+0x138/0x3a0 [ 34.219083] __x64_sys_munmap+0x59/0x80 [ 34.219586] do_syscall_64+0x3f/0x90 [ 34.220049] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 34.220680] [ 34.220894] The buggy address belongs to the object at ffff888017b6f1d0 [ 34.220894] which belongs to the cache vm_area_struct of size 168 [ 34.222380] The buggy address is located 88 bytes inside of [ 34.222380] freed 168-byte region [ffff888017b6f1d0, ffff888017b6f278) [ 34.223800] [ 34.224015] The buggy address belongs to the physical page: [ 34.224689] page:000000003f3b4491 refcount:1 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0x17b6f [ 34.225804] memcg:ffff888019df3d01 [ 34.226223] flags: 0x100000000000200(slab|node=0|zone=1) [ 34.226872] page_type: 0xffffffff() [ 34.227324] raw: 0100000000000200 ffff88800879fc80 dead000000000122 0000000000000000 [ 34.228231] raw: 0000000000000000 0000000000110011 00000001ffffffff ffff888019df3d01 [ 34.229146] page dumped because: kasan: bad access detected [ 34.229810] [ 34.230027] Memory state around the buggy address: [ 34.230607] ffff888017b6f100: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 [ 34.231463] ffff888017b6f180: 00 00 fc fc fc fc fc fc fc fc fa fb fb fb fb fb [ 34.232320] >ffff888017b6f200: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fc [ 34.233187] ^ [ 34.233742] ffff888017b6f280: fc fc fc fc fc fc fc fa fb fb fb fb fb fb fb fb [ 34.234596] ffff888017b6f300: fb fb fb fb fb fb fb fb fb fb fb fb fc fc fc fc [ 34.235461] ================================================================== [ 34.236469] Disabling lock debugging due to kernel taint [ 36.103968] BUG: Bad rss-counter state mm:00000000c857bac8 type:MM_FILEPAGES val:33 [ 36.105183] BUG: Bad rss-counter state mm:00000000c857bac8 type:MM_ANONPAGES val:22 [ 36.573763] BUG: Bad rss-counter state mm:0000000052e34d0f type:MM_FILEPAGES val:33 [ 36.575023] BUG: Bad rss-counter state mm:0000000052e34d0f type:MM_ANONPAGES val:22 Warning: Permanently added '[localhost]:52733' (ECDSA) to the list of known hosts. 2023/06/19 17:00:27 fuzzer started 2023/06/19 17:00:27 dialing manager at localhost:44161 2023/06/19 17:00:28 checking machine... 2023/06/19 17:00:28 checking revisions... [ 37.316958] kmemleak: Automatic memory scanning thread ended 2023/06/19 17:00:28 testing simple program... [ 37.367562] cgroup: Unknown subsys name 'net' [ 37.424341] cgroup: Unknown subsys name 'rlimit' executing program executing program executing program VM DIAGNOSIS: 17:00:24 Registers: info registers vcpu 0 RAX=0000000000000000 RBX=ffffffff85dfc7ec RCX=ffffffff8180b154 RDX=0000000000000000 RSI=ffffffff861371f0 RDI=ffffffff85dfc7ec RBP=ffffffff85dfc7ec RSP=ffff88801003f468 R8 =ffffffff861371f0 R9 =ffff88801003f560 R10=0000000000038001 R11=0000000000020d06 R12=ffffffff85dfc7ec R13=ffffffff85dfc7ec R14=ffffffff85dfc7ec R15=dffffc0000000000 RIP=ffffffff8112fc73 RFL=00000256 [---ZAP-] 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 00007fc2b1d89700 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=00007f4cf9c8d0b0 CR3=000000000cada000 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=6d6f72662064657463656e6e6f637369 XMM02=2e303120746f6f722072657375206d6f XMM03=3a5d3533325b646873732037323a3030 XMM04=6456774875434142334f726f59427469 XMM05=485320415352203a3268737320343734 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=ffffffff8450c50e RDX=ffffed100d9e6a01 RSI=0000000000000004 RDI=ffffffff812889a5 RBP=dffffc0000000000 RSP=ffff888008e27e70 R8 =0000000000000000 R9 =ffffed100d9e6a00 R10=ffff88806cf35003 R11=0000000000000001 R12=ffffffff85d3bed0 R13=1ffff110011c4fd3 R14=0000000000000000 R15=0000000000000000 RIP=ffffffff8450d49f 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=00007feb9ec51ee0 CR3=000000000c506000 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=29a2f884afee7d85274fc0bc404cb1f3 XMM02=2c67c8bc2e329bc300000000001202f0 XMM03=fb795ef6d657705600000000001269c0 XMM04=5cea9d8bcd47d6a600000000000ae988 XMM05=6860aeb314f8829d0000000000135e50 XMM06=13e856d8d71426c80000000000135cd8 XMM07=e042d86d42eb936e0000000000126c40 XMM08=c342a66ad99c485f0000000000120350 XMM09=00000000000000000000000000000000 XMM10=20200000000020202020202020200000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000