syzkaller login: [ 30.526055] BUG: Bad rss-counter state mm:00000000192070a8 type:MM_FILEPAGES val:33 [ 30.527159] BUG: Bad rss-counter state mm:00000000192070a8 type:MM_ANONPAGES val:22 [ 30.705352] ================================================================== [ 30.706371] BUG: KASAN: slab-use-after-free in vma_interval_tree_remove+0xc75/0xec0 [ 30.707407] Read of size 8 at addr ffff888010069310 by task sshd/221 [ 30.708395] [ 30.708639] CPU: 1 PID: 221 Comm: sshd Not tainted 6.4.0-rc7-next-20230620 #1 [ 30.709678] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS 1.12.0-1 04/01/2014 [ 30.710761] Call Trace: [ 30.711142] [ 30.711462] dump_stack_lvl+0x91/0xf0 [ 30.712021] print_report+0xcc/0x620 [ 30.712556] ? __virt_addr_valid+0x102/0x340 [ 30.713165] ? vma_interval_tree_remove+0xc75/0xec0 [ 30.713854] ? vma_interval_tree_remove+0xc75/0xec0 [ 30.714533] kasan_report+0xbe/0xf0 [ 30.715062] ? vma_interval_tree_remove+0xc75/0xec0 [ 30.715751] vma_interval_tree_remove+0xc75/0xec0 [ 30.716430] vma_prepare+0xc54/0x11a0 [ 30.716959] __split_vma+0x5af/0x950 [ 30.717481] ? __pfx___split_vma+0x10/0x10 [ 30.718070] ? find_held_lock+0x2c/0x110 [ 30.718653] do_vmi_align_munmap+0x2ba/0x11f0 [ 30.719279] ? lock_is_held_type+0x9f/0x120 [ 30.719902] ? __pfx_do_vmi_align_munmap+0x10/0x10 [ 30.720552] ? mtree_range_walk+0x632/0x900 [ 30.721106] ? mas_walk+0x5c7/0x7c0 [ 30.721592] do_vmi_munmap+0x1f1/0x2b0 [ 30.722084] mmap_region+0x1f9/0x2660 [ 30.722567] ? vm_mmap_pgoff+0x15c/0x3a0 [ 30.723076] ? __pfx_arch_get_unmapped_area_topdown+0x10/0x10 [ 30.723799] ? __pfx_lock_acquire+0x10/0x10 [ 30.724344] ? __pfx_mmap_region+0x10/0x10 [ 30.724876] ? security_mmap_addr+0x7d/0xa0 [ 30.725409] ? get_unmapped_area+0x1f5/0x3f0 [ 30.725964] do_mmap+0x854/0xf00 [ 30.726408] vm_mmap_pgoff+0x1a6/0x3a0 [ 30.726906] ? __pfx_vm_mmap_pgoff+0x10/0x10 [ 30.727478] ksys_mmap_pgoff+0x3af/0x500 [ 30.727995] do_syscall_64+0x3f/0x90 [ 30.728476] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 30.729126] RIP: 0033:0x7ff9301ffd82 [ 30.729582] 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 [ 30.731716] RSP: 002b:00007fffcfb30988 EFLAGS: 00000206 ORIG_RAX: 0000000000000009 [ 30.732632] RAX: ffffffffffffffda RBX: 0000000000000812 RCX: 00007ff9301ffd82 [ 30.733483] RDX: 0000000000000005 RSI: 0000000000001000 RDI: 00007ff92f639000 [ 30.734326] RBP: 00007ff92f639000 R08: 0000000000000009 R09: 0000000000001000 [ 30.735170] R10: 0000000000000812 R11: 0000000000000206 R12: 0000562dc8412f70 [ 30.736021] R13: 00007fffcfb309a0 R14: 00007fffcfb309d0 R15: 00007fffcfb30d30 [ 30.736874] [ 30.737166] [ 30.737383] Allocated by task 214: [ 30.737818] kasan_save_stack+0x22/0x50 [ 30.738320] kasan_set_track+0x25/0x30 [ 30.738817] __kasan_slab_alloc+0x59/0x70 [ 30.739346] kmem_cache_alloc+0x16b/0x370 [ 30.739883] vm_area_dup+0x20/0x160 [ 30.740337] __split_vma+0x170/0x950 [ 30.740805] split_vma+0xc6/0x110 [ 30.741247] mprotect_fixup+0x8d2/0xb30 [ 30.741755] do_mprotect_pkey+0x87e/0xd40 [ 30.742277] __x64_sys_mprotect+0x78/0xc0 [ 30.742799] do_syscall_64+0x3f/0x90 [ 30.743275] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 30.743927] [ 30.744145] Freed by task 214: [ 30.744539] kasan_save_stack+0x22/0x50 [ 30.745052] kasan_set_track+0x25/0x30 [ 30.745550] kasan_save_free_info+0x2b/0x50 [ 30.746089] __kasan_slab_free+0x10a/0x190 [ 30.746629] kmem_cache_free+0x10d/0x4d0 [ 30.747140] rcu_core+0x8c8/0x2860 [ 30.747588] __do_softirq+0x1b7/0x7d4 [ 30.748084] [ 30.748300] Last potentially related work creation: [ 30.748889] kasan_save_stack+0x22/0x50 [ 30.749399] __kasan_record_aux_stack+0x8e/0xa0 [ 30.749955] __call_rcu_common.constprop.0+0x6a/0xb90 [ 30.750631] remove_vma+0x139/0x170 [ 30.751077] do_vmi_align_munmap+0xd4a/0x11f0 [ 30.751605] do_vmi_munmap+0x1f1/0x2b0 [ 30.752075] __vm_munmap+0x138/0x3a0 [ 30.752523] __x64_sys_munmap+0x59/0x80 [ 30.752995] do_syscall_64+0x3f/0x90 [ 30.753447] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 30.754054] [ 30.754260] The buggy address belongs to the object at ffff8880100692b8 [ 30.754260] which belongs to the cache vm_area_struct of size 168 [ 30.755651] The buggy address is located 88 bytes inside of [ 30.755651] freed 168-byte region [ffff8880100692b8, ffff888010069360) [ 30.757111] [ 30.757362] The buggy address belongs to the physical page: [ 30.758132] page:00000000bd515042 refcount:1 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0x10069 [ 30.759406] memcg:ffff88800db1f601 [ 30.759926] flags: 0x100000000000200(slab|node=0|zone=1) [ 30.760679] page_type: 0xffffffff() [ 30.761205] raw: 0100000000000200 ffff8880087a0c80 dead000000000100 dead000000000122 [ 30.762281] raw: 0000000000000000 0000000000110011 00000001ffffffff ffff88800db1f601 [ 30.763338] page dumped because: kasan: bad access detected [ 30.764120] [ 30.764365] Memory state around the buggy address: [ 30.765045] ffff888010069200: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 fc [ 30.766046] ffff888010069280: fc fc fc fc fc fc fc fa fb fb fb fb fb fb fb fb [ 30.767043] >ffff888010069300: fb fb fb fb fb fb fb fb fb fb fb fb fc fc fc fc [ 30.768062] ^ [ 30.768612] ffff888010069380: fc fc fc fc fa fb fb fb fb fb fb fb fb fb fb fb [ 30.769604] ffff888010069400: fb fb fb fb fb fb fb fb fb fc fc fc fc fc fc fc [ 30.770595] ================================================================== [ 30.771702] Disabling lock debugging due to kernel taint [ 33.057608] BUG: Bad rss-counter state mm:000000006a2f3a4c type:MM_FILEPAGES val:33 [ 33.058472] BUG: Bad rss-counter state mm:000000006a2f3a4c type:MM_ANONPAGES val:22 [ 33.633474] BUG: Bad rss-counter state mm:0000000019284890 type:MM_FILEPAGES val:33 [ 33.634678] BUG: Bad rss-counter state mm:0000000019284890 type:MM_ANONPAGES val:22 Warning: Permanently added '[localhost]:11604' (ECDSA) to the list of known hosts. 2023/06/20 21:36:11 fuzzer started 2023/06/20 21:36:11 dialing manager at localhost:36067 2023/06/20 21:36:11 checking machine... 2023/06/20 21:36:11 checking revisions... [ 34.266124] kmemleak: Automatic memory scanning thread ended 2023/06/20 21:36:11 testing simple program... [ 34.314146] cgroup: Unknown subsys name 'net' [ 34.370664] cgroup: Unknown subsys name 'rlimit' executing program executing program executing program VM DIAGNOSIS: 21:36:11 Registers: info registers vcpu 0 RAX=ffff88806ce35000 RBX=0000000000000000 RCX=ffffffff8451250e RDX=ffffed100d9c6a01 RSI=0000000000000004 RDI=ffffffff81288ac5 RBP=dffffc0000000000 RSP=ffffffff85407e10 R8 =0000000000000000 R9 =ffffed100d9c6a00 R10=ffff88806ce35003 R11=ffff888008c04000 R12=ffffffff85d3d350 R13=1ffffffff0a80fc7 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 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=00007f2fffdcf410 CR3=000000000d70e000 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=0b1192c213ad6f90cc4552d7f0345ee6 XMM02=000000000011b4a8ec2efd57dc4c00df XMM03=00000000001226905be2d8d40273019b XMM04=51578b4811b5ade500000000000ae988 XMM05=59d5b690e0af863b00000000001324f0 XMM06=5f90880039a0300c0000000000131358 XMM07=e042d86d42eb936e0000000000122910 XMM08=5be2d8d40273019b000000000011b508 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=00007f9c334b60b0 CR3=0000000009afe000 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=2030313a36333a3132203032206e754a XMM01=73732878696e755f6d6170203a5d3133 XMM02=65736f6c63206e6f6973736573203a29 XMM03=755f6d6170203a5d3133325b64687373 XMM04=69662068637573206f4e203a656c6163 XMM05=3a656c696620766e65206e65706f206f XMM06=65733a6468737328766e655f6d617020 XMM07=6b7a79732030313a36333a3132203032 XMM08=3d656e696c646d632022656369767265 XMM09=00000000000000000000000000000000 XMM10=00000000000000000000000000000000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000