syzkaller login: [ 30.997408] BUG: Bad rss-counter state mm:0000000078284a0f type:MM_FILEPAGES val:33 [ 30.998888] BUG: Bad rss-counter state mm:0000000078284a0f type:MM_ANONPAGES val:22 [ 31.146097] ================================================================== [ 31.147021] BUG: KASAN: slab-use-after-free in vma_interval_tree_remove+0xc75/0xec0 [ 31.147969] Read of size 8 at addr ffff88800dcb14e0 by task sshd/220 [ 31.148838] [ 31.149057] CPU: 0 PID: 220 Comm: sshd Not tainted 6.4.0-rc7-next-20230620 #1 [ 31.149930] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS 1.12.0-1 04/01/2014 [ 31.150927] Call Trace: [ 31.151250] [ 31.151543] dump_stack_lvl+0x91/0xf0 [ 31.152038] print_report+0xcc/0x620 [ 31.152523] ? __virt_addr_valid+0x102/0x340 [ 31.153072] ? vma_interval_tree_remove+0xc75/0xec0 [ 31.153721] ? vma_interval_tree_remove+0xc75/0xec0 [ 31.154339] kasan_report+0xbe/0xf0 [ 31.154820] ? vma_interval_tree_remove+0xc75/0xec0 [ 31.155450] vma_interval_tree_remove+0xc75/0xec0 [ 31.156072] vma_prepare+0xc54/0x11a0 [ 31.156569] __split_vma+0x5af/0x950 [ 31.157065] ? __pfx___split_vma+0x10/0x10 [ 31.157635] ? find_held_lock+0x2c/0x110 [ 31.158196] do_vmi_align_munmap+0x2ba/0x11f0 [ 31.158796] ? lock_is_held_type+0x9f/0x120 [ 31.159369] ? __pfx_do_vmi_align_munmap+0x10/0x10 [ 31.160016] ? mtree_range_walk+0x632/0x900 [ 31.160604] ? mas_walk+0x5c7/0x7c0 [ 31.161108] do_vmi_munmap+0x1f1/0x2b0 [ 31.161631] mmap_region+0x1f9/0x2660 [ 31.162140] ? vm_mmap_pgoff+0x15c/0x3a0 [ 31.162682] ? __pfx_arch_get_unmapped_area_topdown+0x10/0x10 [ 31.163447] ? __pfx_lock_acquire+0x10/0x10 [ 31.164017] ? __pfx_mmap_region+0x10/0x10 [ 31.164582] ? security_mmap_addr+0x7d/0xa0 [ 31.165148] ? get_unmapped_area+0x1f5/0x3f0 [ 31.165750] do_mmap+0x854/0xf00 [ 31.166208] vm_mmap_pgoff+0x1a6/0x3a0 [ 31.166734] ? __pfx_vm_mmap_pgoff+0x10/0x10 [ 31.167323] ksys_mmap_pgoff+0x3af/0x500 [ 31.167858] do_syscall_64+0x3f/0x90 [ 31.168358] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 31.169038] RIP: 0033:0x7f0bf89d4d82 [ 31.169532] 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 [ 31.171833] RSP: 002b:00007ffc7e663b98 EFLAGS: 00000206 ORIG_RAX: 0000000000000009 [ 31.172796] RAX: ffffffffffffffda RBX: 0000000000000812 RCX: 00007f0bf89d4d82 [ 31.173719] RDX: 0000000000000005 RSI: 0000000000001000 RDI: 00007f0bf7e0e000 [ 31.174623] RBP: 00007f0bf7e0e000 R08: 0000000000000009 R09: 0000000000001000 [ 31.175527] R10: 0000000000000812 R11: 0000000000000206 R12: 00005557e7d00980 [ 31.176432] R13: 00007ffc7e663bb0 R14: 00007ffc7e663be0 R15: 00007ffc7e663f40 [ 31.177349] [ 31.177685] [ 31.177907] Allocated by task 213: [ 31.178357] kasan_save_stack+0x22/0x50 [ 31.178900] kasan_set_track+0x25/0x30 [ 31.179420] __kasan_slab_alloc+0x59/0x70 [ 31.179970] kmem_cache_alloc+0x16b/0x370 [ 31.180523] vm_area_dup+0x20/0x160 [ 31.180997] __split_vma+0x170/0x950 [ 31.181494] split_vma+0xc6/0x110 [ 31.181965] mprotect_fixup+0x8d2/0xb30 [ 31.182496] do_mprotect_pkey+0x87e/0xd40 [ 31.183046] __x64_sys_mprotect+0x78/0xc0 [ 31.183592] do_syscall_64+0x3f/0x90 [ 31.184105] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 31.184794] [ 31.185022] Freed by task 213: [ 31.185446] kasan_save_stack+0x22/0x50 [ 31.185998] kasan_set_track+0x25/0x30 [ 31.186525] kasan_save_free_info+0x2b/0x50 [ 31.187101] __kasan_slab_free+0x10a/0x190 [ 31.187672] kmem_cache_free+0x10d/0x4d0 [ 31.188210] rcu_core+0x8c8/0x2860 [ 31.188684] __do_softirq+0x1b7/0x7d4 [ 31.189186] [ 31.189433] Last potentially related work creation: [ 31.190057] kasan_save_stack+0x22/0x50 [ 31.190592] __kasan_record_aux_stack+0x8e/0xa0 [ 31.191193] __call_rcu_common.constprop.0+0x6a/0xb90 [ 31.191874] remove_vma+0x139/0x170 [ 31.192353] do_vmi_align_munmap+0xd4a/0x11f0 [ 31.192946] do_vmi_munmap+0x1f1/0x2b0 [ 31.193461] __vm_munmap+0x138/0x3a0 [ 31.193955] __x64_sys_munmap+0x59/0x80 [ 31.194481] do_syscall_64+0x3f/0x90 [ 31.194976] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 31.195659] [ 31.195879] The buggy address belongs to the object at ffff88800dcb1488 [ 31.195879] which belongs to the cache vm_area_struct of size 168 [ 31.197462] The buggy address is located 88 bytes inside of [ 31.197462] freed 168-byte region [ffff88800dcb1488, ffff88800dcb1530) [ 31.198968] [ 31.199197] The buggy address belongs to the physical page: [ 31.199910] page:00000000fb4c8fe7 refcount:1 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0xdcb1 [ 31.201075] memcg:ffff88800c9c3601 [ 31.201539] flags: 0x100000000000200(slab|node=0|zone=1) [ 31.202227] page_type: 0xffffffff() [ 31.202703] raw: 0100000000000200 ffff8880087a0c80 dead000000000122 0000000000000000 [ 31.203690] raw: 0000000000000000 0000000000110011 00000001ffffffff ffff88800c9c3601 [ 31.204663] page dumped because: kasan: bad access detected [ 31.205373] [ 31.205593] Memory state around the buggy address: [ 31.206212] ffff88800dcb1380: fc fc fc fc 00 00 00 00 00 00 00 00 00 00 00 00 [ 31.207122] ffff88800dcb1400: 00 00 00 00 00 00 00 00 00 fc fc fc fc fc fc fc [ 31.208020] >ffff88800dcb1480: fc fa fb fb fb fb fb fb fb fb fb fb fb fb fb fb [ 31.208921] ^ [ 31.209730] ffff88800dcb1500: fb fb fb fb fb fb fc fc fc fc fc fc fc fc fa fb [ 31.210642] ffff88800dcb1580: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb [ 31.211533] ================================================================== [ 31.212647] Disabling lock debugging due to kernel taint [ 32.933193] BUG: Bad rss-counter state mm:00000000204b9605 type:MM_FILEPAGES val:33 [ 32.933967] BUG: Bad rss-counter state mm:00000000204b9605 type:MM_ANONPAGES val:22 [ 33.378342] BUG: Bad rss-counter state mm:00000000aed449f9 type:MM_FILEPAGES val:33 [ 33.379536] BUG: Bad rss-counter state mm:00000000aed449f9 type:MM_ANONPAGES val:22 Warning: Permanently added '[localhost]:48578' (ECDSA) to the list of known hosts. 2023/06/20 14:09:46 fuzzer started 2023/06/20 14:09:46 dialing manager at localhost:36067 2023/06/20 14:09:46 checking machine... 2023/06/20 14:09:46 checking revisions... [ 34.082454] kmemleak: Automatic memory scanning thread ended 2023/06/20 14:09:46 testing simple program... [ 34.134513] cgroup: Unknown subsys name 'net' [ 34.178030] cgroup: Unknown subsys name 'rlimit' executing program executing program executing program VM DIAGNOSIS: 14:09:46 Registers: info registers vcpu 0 RAX=0000777f80000000 RBX=ffff88800d6d0000 RCX=0000000000000000 RDX=0000000000000000 RSI=ffffffff818937f2 RDI=ffff8880087b83c0 RBP=ffff88800ee7fd98 RSP=ffff88800ee7fd70 R8 =0000000000000005 R9 =0000000000000000 R10=0000000000000000 R11=0000000000000001 R12=ffff8880087b83c0 R13=ffff88808d6d0000 R14=ffffffff818937f2 R15=dffffc0000000000 RIP=ffffffff81809b6e RFL=00000206 [-----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 00007f555998b900 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=00007f5559f40650 CR3=0000000019c12000 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=ffffffff00ffffffffffffffffffffff XMM01=707465675f6c697475646f6d6d61705f XMM02=ff000000000000ff0000000000ff0000 XMM03=66207463656e6e6f6373696420646576 XMM04=00000000000000000000000000000000 XMM05=00000000000000000000000000000000 XMM06=0d0c0f0e09080b0a0504070601000302 XMM07=00000000000000000000000000000000 XMM08=000a0d732a2e25006c61746166003367 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=0000000000000001 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=00007ffe88c47e38 CR3=000000000dd84000 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=2035343a39303a3431203032206e754a XMM01=657463656e6e6f63736944203a5d3932 XMM02=302e303120746f6f722072657375206d XMM03=203a5d3932325b646873732072656c6c XMM04=69662068637573206f4e203a656c6163 XMM05=3a656c696620766e65206e65706f206f XMM06=65733a6468737328766e655f6d617020 XMM07=6b7a79732035343a39303a3431203032 XMM08=3d656e696c646d632022656369767265 XMM09=00000000000000000000000000000000 XMM10=00000000000000000000000000000000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000