syzkaller login: [ 36.423056] BUG: Bad rss-counter state mm:00000000609fc8aa type:MM_FILEPAGES val:33 [ 36.424776] BUG: Bad rss-counter state mm:00000000609fc8aa type:MM_ANONPAGES val:22 [ 36.575996] ================================================================== [ 36.577076] BUG: KASAN: slab-use-after-free in vma_interval_tree_remove+0xc75/0xec0 [ 36.578258] Read of size 8 at addr ffff8880183bd798 by task sshd/220 [ 36.579035] [ 36.579254] CPU: 1 PID: 220 Comm: sshd Not tainted 6.4.0-rc7-next-20230619 #1 [ 36.580150] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS 1.12.0-1 04/01/2014 [ 36.581118] Call Trace: [ 36.581438] [ 36.581723] dump_stack_lvl+0x91/0xf0 [ 36.582218] print_report+0xcc/0x620 [ 36.582701] ? __virt_addr_valid+0x102/0x340 [ 36.583266] ? vma_interval_tree_remove+0xc75/0xec0 [ 36.583885] ? vma_interval_tree_remove+0xc75/0xec0 [ 36.584502] kasan_report+0xbe/0xf0 [ 36.584988] ? vma_interval_tree_remove+0xc75/0xec0 [ 36.585608] vma_interval_tree_remove+0xc75/0xec0 [ 36.586213] vma_prepare+0xc54/0x11a0 [ 36.586691] __split_vma+0x5af/0x950 [ 36.587189] ? __pfx___split_vma+0x10/0x10 [ 36.587718] ? find_held_lock+0x2c/0x110 [ 36.588243] do_vmi_align_munmap+0x2ba/0x11f0 [ 36.588816] ? lock_is_held_type+0x9f/0x120 [ 36.589360] ? __pfx_do_vmi_align_munmap+0x10/0x10 [ 36.589973] ? mtree_range_walk+0x632/0x900 [ 36.590525] ? mas_walk+0x5c7/0x7c0 [ 36.591014] do_vmi_munmap+0x1f1/0x2b0 [ 36.591503] mmap_region+0x1f9/0x2660 [ 36.592000] ? vm_mmap_pgoff+0x15c/0x3a0 [ 36.592513] ? __pfx_arch_get_unmapped_area_topdown+0x10/0x10 [ 36.593230] ? __pfx_lock_acquire+0x10/0x10 [ 36.593764] ? __pfx_mmap_region+0x10/0x10 [ 36.594299] ? security_mmap_addr+0x7d/0xa0 [ 36.594844] ? get_unmapped_area+0x1f5/0x3f0 [ 36.595400] do_mmap+0x854/0xf00 [ 36.595837] vm_mmap_pgoff+0x1a6/0x3a0 [ 36.596336] ? __pfx_vm_mmap_pgoff+0x10/0x10 [ 36.596899] ksys_mmap_pgoff+0x3af/0x500 [ 36.597406] do_syscall_64+0x3f/0x90 [ 36.597883] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 36.598533] RIP: 0033:0x7f4f047f3d82 [ 36.599005] 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 [ 36.601138] RSP: 002b:00007ffdc27cd0c8 EFLAGS: 00000206 ORIG_RAX: 0000000000000009 [ 36.602044] RAX: ffffffffffffffda RBX: 0000000000000812 RCX: 00007f4f047f3d82 [ 36.602912] RDX: 0000000000000005 RSI: 0000000000001000 RDI: 00007f4f03c2d000 [ 36.603766] RBP: 00007f4f03c2d000 R08: 0000000000000009 R09: 0000000000001000 [ 36.604613] R10: 0000000000000812 R11: 0000000000000206 R12: 0000556626907ec0 [ 36.605466] R13: 00007ffdc27cd0e0 R14: 00007ffdc27cd110 R15: 00007ffdc27cd470 [ 36.606330] [ 36.606626] [ 36.606860] Allocated by task 213: [ 36.607289] kasan_save_stack+0x22/0x50 [ 36.607800] kasan_set_track+0x25/0x30 [ 36.608295] __kasan_slab_alloc+0x59/0x70 [ 36.608821] kmem_cache_alloc+0x16b/0x370 [ 36.609340] vm_area_dup+0x20/0x160 [ 36.609795] __split_vma+0x170/0x950 [ 36.610266] split_vma+0xc6/0x110 [ 36.610705] mprotect_fixup+0x8d2/0xb30 [ 36.611220] do_mprotect_pkey+0x87e/0xd40 [ 36.611754] __x64_sys_mprotect+0x78/0xc0 [ 36.612282] do_syscall_64+0x3f/0x90 [ 36.612761] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 36.613416] [ 36.613631] Freed by task 213: [ 36.614036] kasan_save_stack+0x22/0x50 [ 36.614549] kasan_set_track+0x25/0x30 [ 36.615082] kasan_save_free_info+0x2b/0x50 [ 36.615627] __kasan_slab_free+0x10a/0x190 [ 36.616169] kmem_cache_free+0x10d/0x4d0 [ 36.616682] rcu_core+0x8c8/0x2860 [ 36.617131] __do_softirq+0x1b7/0x7d4 [ 36.617609] [ 36.617825] Last potentially related work creation: [ 36.618440] kasan_save_stack+0x22/0x50 [ 36.618968] __kasan_record_aux_stack+0x8e/0xa0 [ 36.619559] __call_rcu_common.constprop.0+0x6a/0xb90 [ 36.620203] remove_vma+0x139/0x170 [ 36.620653] do_vmi_align_munmap+0xd4a/0x11f0 [ 36.621214] do_vmi_munmap+0x1f1/0x2b0 [ 36.621699] __vm_munmap+0x138/0x3a0 [ 36.622166] __x64_sys_munmap+0x59/0x80 [ 36.622666] do_syscall_64+0x3f/0x90 [ 36.623162] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 36.623806] [ 36.624023] The buggy address belongs to the object at ffff8880183bd740 [ 36.624023] which belongs to the cache vm_area_struct of size 168 [ 36.625484] The buggy address is located 88 bytes inside of [ 36.625484] freed 168-byte region [ffff8880183bd740, ffff8880183bd7e8) [ 36.626885] [ 36.627104] The buggy address belongs to the physical page: [ 36.627759] page:00000000f79743a8 refcount:1 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0x183bd [ 36.628875] memcg:ffff8880183b0401 [ 36.629300] anon flags: 0x100000000000200(slab|node=0|zone=1) [ 36.630011] page_type: 0xffffffff() [ 36.630460] raw: 0100000000000200 ffff88800879fc80 ffffea000060ed80 dead000000000007 [ 36.631394] raw: 0000000000000000 0000000000110011 00000001ffffffff ffff8880183b0401 [ 36.632296] page dumped because: kasan: bad access detected [ 36.632964] [ 36.633179] Memory state around the buggy address: [ 36.633776] ffff8880183bd680: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb [ 36.634649] ffff8880183bd700: fc fc fc fc fc fc fc fc fa fb fb fb fb fb fb fb [ 36.635536] >ffff8880183bd780: fb fb fb fb fb fb fb fb fb fb fb fb fb fc fc fc [ 36.636394] ^ [ 36.636895] ffff8880183bd800: fc fc fc fc fc 00 00 00 00 00 00 00 00 00 00 00 [ 36.637758] ffff8880183bd880: 00 00 00 00 00 00 00 00 00 00 fc fc fc fc fc fc [ 36.638631] ================================================================== [ 36.639859] Disabling lock debugging due to kernel taint [ 39.571139] BUG: Bad rss-counter state mm:00000000048ef32b type:MM_FILEPAGES val:33 [ 39.572306] BUG: Bad rss-counter state mm:00000000048ef32b type:MM_ANONPAGES val:22 [ 40.156350] BUG: Bad rss-counter state mm:000000001c6401bc type:MM_FILEPAGES val:33 [ 40.157594] BUG: Bad rss-counter state mm:000000001c6401bc type:MM_ANONPAGES val:22 Warning: Permanently added '[localhost]:27526' (ECDSA) to the list of known hosts. 2023/06/20 02:00:31 fuzzer started 2023/06/20 02:00:32 dialing manager at localhost:44161 2023/06/20 02:00:32 checking machine... 2023/06/20 02:00:32 checking revisions... [ 40.821466] kmemleak: Automatic memory scanning thread ended 2023/06/20 02:00:32 testing simple program... [ 40.872144] cgroup: Unknown subsys name 'net' [ 40.931841] cgroup: Unknown subsys name 'rlimit' executing program executing program executing program VM DIAGNOSIS: 02:00:26 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=00007ffe708e4c88 CR3=000000000c992000 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=2031333a30303a3230203032206e754a XMM01=657463656e6e6f63736944203a5d3932 XMM02=302e303120746f6f722072657375206d XMM03=203a5d3932325b646873732072656c6c XMM04=69662068637573206f4e203a656c6163 XMM05=3a656c696620766e65206e65706f206f XMM06=65733a6468737328766e655f6d617020 XMM07=6b7a79732031333a30303a3230203032 XMM08=3d656e696c646d632022656369767265 XMM09=00000000000000000000000000000000 XMM10=00000000000000000000000000000000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000 info registers vcpu 1 RAX=0000000000000000 RBX=0000000000000001 RCX=ffffffff86137501 RDX=0000000000000001 RSI=ffffffff8180ee7e RDI=ffff88801633f880 RBP=ffff88801633f8d8 RSP=ffff88801633f810 R8 =ffffffff8613751e R9 =ffff88801633f8c0 R10=0000000000038001 R11=0000000000020d8a R12=ffff88801633f8e0 R13=ffff88801633f8c8 R14=ffff88801633f8c1 R15=ffff88801633f880 RIP=ffffffff811306ec 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 00007f785bd1b900 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=00007f785c2d0650 CR3=000000000e31a000 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=000000000000000000000000000000ff XMM02=000000000000000000000000000000ff XMM03=5320444f4854454d5f54505952434e45 XMM04=40404040404040404040404040404040 XMM05=5a5a5a5a5a5a5a5a5a5a5a5a5a5a5a5a XMM06=20202020202020202020202020202020 XMM07=00000000000000000000000000000000 XMM08=ffbc64ffffbc44ffffbc34ffffbc9f00 XMM09=00000000000000000000000000000000 XMM10=00000000000000000000000000000000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000