syzkaller login: [ 28.611870] BUG: Bad rss-counter state mm:00000000b57f974b type:MM_FILEPAGES val:33 [ 28.612600] BUG: Bad rss-counter state mm:00000000b57f974b type:MM_ANONPAGES val:22 [ 28.741503] ================================================================== [ 28.742037] BUG: KASAN: slab-use-after-free in vma_interval_tree_remove+0xc75/0xec0 [ 28.742576] Read of size 8 at addr ffff888009d2c140 by task sshd/220 [ 28.743023] [ 28.743148] CPU: 1 PID: 220 Comm: sshd Not tainted 6.4.0-rc7-next-20230619 #1 [ 28.743646] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS 1.12.0-1 04/01/2014 [ 28.744215] Call Trace: [ 28.744402] [ 28.744566] dump_stack_lvl+0x91/0xf0 [ 28.744855] print_report+0xcc/0x620 [ 28.745133] ? __virt_addr_valid+0x102/0x340 [ 28.745471] ? vma_interval_tree_remove+0xc75/0xec0 [ 28.745828] ? vma_interval_tree_remove+0xc75/0xec0 [ 28.746309] kasan_report+0xbe/0xf0 [ 28.746586] ? vma_interval_tree_remove+0xc75/0xec0 [ 28.746948] vma_interval_tree_remove+0xc75/0xec0 [ 28.747298] vma_prepare+0xc54/0x11a0 [ 28.747577] __split_vma+0x5af/0x950 [ 28.747847] ? __pfx___split_vma+0x10/0x10 [ 28.748151] ? find_held_lock+0x2c/0x110 [ 28.748464] do_vmi_align_munmap+0x2ba/0x11f0 [ 28.748787] ? lock_is_held_type+0x9f/0x120 [ 28.749102] ? __pfx_do_vmi_align_munmap+0x10/0x10 [ 28.749473] ? mtree_range_walk+0x632/0x900 [ 28.749833] ? mas_walk+0x5c7/0x7c0 [ 28.750224] do_vmi_munmap+0x1f1/0x2b0 [ 28.750634] mmap_region+0x1f9/0x2660 [ 28.751033] ? vm_mmap_pgoff+0x15c/0x3a0 [ 28.751454] ? __pfx_arch_get_unmapped_area_topdown+0x10/0x10 [ 28.752042] ? __pfx_lock_acquire+0x10/0x10 [ 28.752482] ? __pfx_mmap_region+0x10/0x10 [ 28.752929] ? security_mmap_addr+0x7d/0xa0 [ 28.753399] ? get_unmapped_area+0x1f5/0x3f0 [ 28.753854] do_mmap+0x854/0xf00 [ 28.754227] vm_mmap_pgoff+0x1a6/0x3a0 [ 28.754637] ? __pfx_vm_mmap_pgoff+0x10/0x10 [ 28.755106] ksys_mmap_pgoff+0x3af/0x500 [ 28.755522] do_syscall_64+0x3f/0x90 [ 28.755920] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 28.756462] RIP: 0033:0x7f65754bbd82 [ 28.756845] 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 [ 28.758620] RSP: 002b:00007ffde6272518 EFLAGS: 00000206 ORIG_RAX: 0000000000000009 [ 28.759370] RAX: ffffffffffffffda RBX: 0000000000000812 RCX: 00007f65754bbd82 [ 28.760094] RDX: 0000000000000005 RSI: 0000000000001000 RDI: 00007f65748f5000 [ 28.760815] RBP: 00007f65748f5000 R08: 0000000000000009 R09: 0000000000001000 [ 28.761535] R10: 0000000000000812 R11: 0000000000000206 R12: 0000561460c72ec0 [ 28.762097] R13: 00007ffde6272530 R14: 00007ffde6272560 R15: 00007ffde62728c0 [ 28.762595] [ 28.762767] [ 28.762891] Allocated by task 213: [ 28.763142] kasan_save_stack+0x22/0x50 [ 28.763432] kasan_set_track+0x25/0x30 [ 28.763718] __kasan_slab_alloc+0x59/0x70 [ 28.764022] kmem_cache_alloc+0x16b/0x370 [ 28.764317] vm_area_dup+0x20/0x160 [ 28.764579] __split_vma+0x170/0x950 [ 28.764847] split_vma+0xc6/0x110 [ 28.765102] mprotect_fixup+0x8d2/0xb30 [ 28.765394] do_mprotect_pkey+0x87e/0xd40 [ 28.765695] __x64_sys_mprotect+0x78/0xc0 [ 28.765990] do_syscall_64+0x3f/0x90 [ 28.766266] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 28.766631] [ 28.766753] Freed by task 213: [ 28.766980] kasan_save_stack+0x22/0x50 [ 28.767271] kasan_set_track+0x25/0x30 [ 28.767556] kasan_save_free_info+0x2b/0x50 [ 28.767863] __kasan_slab_free+0x10a/0x190 [ 28.768173] kmem_cache_free+0x10d/0x4d0 [ 28.768463] rcu_core+0x8c8/0x2860 [ 28.768722] __do_softirq+0x1b7/0x7d4 [ 28.768999] [ 28.769121] Last potentially related work creation: [ 28.769469] kasan_save_stack+0x22/0x50 [ 28.769760] __kasan_record_aux_stack+0x8e/0xa0 [ 28.770093] __call_rcu_common.constprop.0+0x6a/0xb90 [ 28.770465] remove_vma+0x139/0x170 [ 28.770724] do_vmi_align_munmap+0xd4a/0x11f0 [ 28.771049] do_vmi_munmap+0x1f1/0x2b0 [ 28.771328] __vm_munmap+0x138/0x3a0 [ 28.771599] __x64_sys_munmap+0x59/0x80 [ 28.771889] do_syscall_64+0x3f/0x90 [ 28.772165] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 28.772537] [ 28.772659] The buggy address belongs to the object at ffff888009d2c0e8 [ 28.772659] which belongs to the cache vm_area_struct of size 168 [ 28.773534] The buggy address is located 88 bytes inside of [ 28.773534] freed 168-byte region [ffff888009d2c0e8, ffff888009d2c190) [ 28.774354] [ 28.774478] The buggy address belongs to the physical page: [ 28.774865] page:0000000089b6a0db refcount:1 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0x9d2c [ 28.775502] memcg:ffff8880198ba401 [ 28.775745] flags: 0x100000000000200(slab|node=0|zone=1) [ 28.776119] page_type: 0xffffffff() [ 28.776378] raw: 0100000000000200 ffff88800879fc80 dead000000000122 0000000000000000 [ 28.776909] raw: 0000000000000000 0000000000110011 00000001ffffffff ffff8880198ba401 [ 28.777446] page dumped because: kasan: bad access detected [ 28.777830] [ 28.777952] Memory state around the buggy address: [ 28.778290] ffff888009d2c000: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 [ 28.778789] ffff888009d2c080: 00 00 00 00 00 fc fc fc fc fc fc fc fc fa fb fb [ 28.779288] >ffff888009d2c100: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb [ 28.779785] ^ [ 28.780157] ffff888009d2c180: fb fb fc fc fc fc fc fc fc fc fa fb fb fb fb fb [ 28.780657] ffff888009d2c200: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fc [ 28.781159] ================================================================== [ 28.781713] Disabling lock debugging due to kernel taint [ 30.077178] BUG: Bad rss-counter state mm:00000000a72fac8f type:MM_FILEPAGES val:33 [ 30.078472] BUG: Bad rss-counter state mm:00000000a72fac8f type:MM_ANONPAGES val:22 [ 30.378421] BUG: Bad rss-counter state mm:000000000a099983 type:MM_FILEPAGES val:33 [ 30.379209] BUG: Bad rss-counter state mm:000000000a099983 type:MM_ANONPAGES val:22 Warning: Permanently added '[localhost]:57685' (ECDSA) to the list of known hosts. 2023/06/20 08:12:16 fuzzer started 2023/06/20 08:12:17 dialing manager at localhost:44161 2023/06/20 08:12:17 checking machine... 2023/06/20 08:12:17 checking revisions... [ 30.977854] kmemleak: Automatic memory scanning thread ended 2023/06/20 08:12:17 testing simple program... [ 31.015744] cgroup: Unknown subsys name 'net' [ 31.090555] cgroup: Unknown subsys name 'rlimit' executing program executing program executing program VM DIAGNOSIS: 08:12:11 Registers: info registers vcpu 0 RAX=ffff88806ce35000 RBX=0000000000000000 RCX=ffffffff8450c50e RDX=ffffed100d9c6a01 RSI=0000000000000004 RDI=ffffffff812889a5 RBP=dffffc0000000000 RSP=ffffffff85407e10 R8 =0000000000000000 R9 =ffffed100d9c6a00 R10=ffff88806ce35003 R11=ffff888008c58000 R12=ffffffff85d3bed0 R13=1ffffffff0a80fc7 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 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=00007fe00e90ecd0 CR3=000000001985a000 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=2036313a32313a3830203032206e754a XMM01=73732878696e755f6d6170203a5d3932 XMM02=65736f6c63206e6f6973736573203a29 XMM03=755f6d6170203a5d3932325b64687373 XMM04=69662068637573206f4e203a656c6163 XMM05=3a656c696620766e65206e65706f206f XMM06=65733a6468737328766e655f6d617020 XMM07=6b7a79732036313a32313a3830203032 XMM08=3d656e696c646d632022656369767265 XMM09=00000000000000000000000000000000 XMM10=00000000000000000000000000000000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000 info registers vcpu 1 RAX=0000000000000000 RBX=ffff88806cf09b60 RCX=ffffffff86128101 RDX=0000000000000000 RSI=ffffffff84506c7f RDI=ffff88806cf09b6c RBP=0000000000000014 RSP=ffff88806cf09a78 R8 =ffffffff86128140 R9 =ffff88806cf09ad8 R10=0000000000038001 R11=000000000001e4e6 R12=ffff88806cf09b60 R13=0000000000000000 R14=ffff88800ee351c0 R15=ffff88800f050580 RIP=ffffffff813ad4b6 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 00007f7aac961900 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=00007f7aac930008 CR3=000000000c634000 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=652022746f6f72223d74636361207469 XMM02=3d6c616e696d72657420322e322e302e XMM03=3d656d616e74736f682022646873732f XMM04=40404040404040404040404040404040 XMM05=5a5a5a5a5a5a5a5a5a5a5a5a5a5a5a5a XMM06=20202020202020202020202020202020 XMM07=00000000000000000000000000000000 XMM08=652075253d64692073253d706f000000 XMM09=00000000000000000000000000000000 XMM10=00000000000000000000000000000000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000