syzkaller login: [ 43.521735] BUG: Bad rss-counter state mm:000000000c84be37 type:MM_FILEPAGES val:33 [ 43.523273] BUG: Bad rss-counter state mm:000000000c84be37 type:MM_ANONPAGES val:22 [ 43.691800] ================================================================== [ 43.692879] BUG: KASAN: slab-use-after-free in vma_interval_tree_remove+0xc75/0xec0 [ 43.693904] Read of size 8 at addr ffff888019f93968 by task sshd/219 [ 43.694683] [ 43.694907] CPU: 0 PID: 219 Comm: sshd Not tainted 6.4.0-rc7-next-20230619 #1 [ 43.695800] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS 1.12.0-1 04/01/2014 [ 43.696814] Call Trace: [ 43.697139] [ 43.697426] dump_stack_lvl+0x91/0xf0 [ 43.697935] print_report+0xcc/0x620 [ 43.698422] ? __virt_addr_valid+0x102/0x340 [ 43.698988] ? vma_interval_tree_remove+0xc75/0xec0 [ 43.699667] ? vma_interval_tree_remove+0xc75/0xec0 [ 43.700339] kasan_report+0xbe/0xf0 [ 43.700823] ? vma_interval_tree_remove+0xc75/0xec0 [ 43.701447] vma_interval_tree_remove+0xc75/0xec0 [ 43.702050] vma_prepare+0xc54/0x11a0 [ 43.702526] __split_vma+0x5af/0x950 [ 43.703004] ? __pfx___split_vma+0x10/0x10 [ 43.703533] ? find_held_lock+0x2c/0x110 [ 43.704063] do_vmi_align_munmap+0x2ba/0x11f0 [ 43.704638] ? lock_is_held_type+0x9f/0x120 [ 43.705182] ? __pfx_do_vmi_align_munmap+0x10/0x10 [ 43.705802] ? mtree_range_walk+0x632/0x900 [ 43.706363] ? mas_walk+0x5c7/0x7c0 [ 43.706839] do_vmi_munmap+0x1f1/0x2b0 [ 43.707331] mmap_region+0x1f9/0x2660 [ 43.707829] ? vm_mmap_pgoff+0x15c/0x3a0 [ 43.708392] ? __pfx_arch_get_unmapped_area_topdown+0x10/0x10 [ 43.709120] ? __pfx_lock_acquire+0x10/0x10 [ 43.709657] ? __pfx_mmap_region+0x10/0x10 [ 43.710184] ? security_mmap_addr+0x7d/0xa0 [ 43.710694] ? get_unmapped_area+0x1f5/0x3f0 [ 43.711256] do_mmap+0x854/0xf00 [ 43.711701] vm_mmap_pgoff+0x1a6/0x3a0 [ 43.712222] ? __pfx_vm_mmap_pgoff+0x10/0x10 [ 43.712786] ksys_mmap_pgoff+0x3af/0x500 [ 43.713296] do_syscall_64+0x3f/0x90 [ 43.713775] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 43.714416] RIP: 0033:0x7fbf76e86d82 [ 43.714876] 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 [ 43.717008] RSP: 002b:00007fff5fecb6d8 EFLAGS: 00000206 ORIG_RAX: 0000000000000009 [ 43.717935] RAX: ffffffffffffffda RBX: 0000000000000812 RCX: 00007fbf76e86d82 [ 43.718778] RDX: 0000000000000005 RSI: 0000000000001000 RDI: 00007fbf762c0000 [ 43.719624] RBP: 00007fbf762c0000 R08: 0000000000000009 R09: 0000000000001000 [ 43.720478] R10: 0000000000000812 R11: 0000000000000206 R12: 000055d05f07aec0 [ 43.721328] R13: 00007fff5fecb6f0 R14: 00007fff5fecb720 R15: 00007fff5fecba80 [ 43.722181] [ 43.722472] [ 43.722693] Allocated by task 212: [ 43.723120] kasan_save_stack+0x22/0x50 [ 43.723625] kasan_set_track+0x25/0x30 [ 43.724135] __kasan_slab_alloc+0x59/0x70 [ 43.724659] kmem_cache_alloc+0x16b/0x370 [ 43.725179] vm_area_dup+0x20/0x160 [ 43.725664] __split_vma+0x170/0x950 [ 43.726148] split_vma+0xc6/0x110 [ 43.726586] mprotect_fixup+0x8d2/0xb30 [ 43.727086] do_mprotect_pkey+0x87e/0xd40 [ 43.727614] __x64_sys_mprotect+0x78/0xc0 [ 43.728144] do_syscall_64+0x3f/0x90 [ 43.728615] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 43.729253] [ 43.729470] Freed by task 19: [ 43.729853] kasan_save_stack+0x22/0x50 [ 43.730352] kasan_set_track+0x25/0x30 [ 43.730848] kasan_save_free_info+0x2b/0x50 [ 43.731387] __kasan_slab_free+0x10a/0x190 [ 43.731932] kmem_cache_free+0x10d/0x4d0 [ 43.732442] rcu_core+0x8c8/0x2860 [ 43.732886] __do_softirq+0x1b7/0x7d4 [ 43.733365] [ 43.733580] Last potentially related work creation: [ 43.734172] kasan_save_stack+0x22/0x50 [ 43.734676] __kasan_record_aux_stack+0x8e/0xa0 [ 43.735259] __call_rcu_common.constprop.0+0x6a/0xb90 [ 43.735928] remove_vma+0x139/0x170 [ 43.736378] do_vmi_align_munmap+0xd4a/0x11f0 [ 43.736938] do_vmi_munmap+0x1f1/0x2b0 [ 43.737423] __vm_munmap+0x138/0x3a0 [ 43.737889] __x64_sys_munmap+0x59/0x80 [ 43.738384] do_syscall_64+0x3f/0x90 [ 43.738860] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 43.739497] [ 43.739713] The buggy address belongs to the object at ffff888019f93910 [ 43.739713] which belongs to the cache vm_area_struct of size 168 [ 43.741177] The buggy address is located 88 bytes inside of [ 43.741177] freed 168-byte region [ffff888019f93910, ffff888019f939b8) [ 43.742569] [ 43.742786] The buggy address belongs to the physical page: [ 43.743444] page:0000000069c2b5c9 refcount:1 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0x19f93 [ 43.744556] memcg:ffff888019f85401 [ 43.744978] flags: 0x100000000000200(slab|node=0|zone=1) [ 43.745629] page_type: 0xffffffff() [ 43.746088] raw: 0100000000000200 ffff88800879fc80 ffffea000067e300 0000000000000004 [ 43.747020] raw: 0000000000000000 0000000000110011 00000001ffffffff ffff888019f85401 [ 43.747963] page dumped because: kasan: bad access detected [ 43.748639] [ 43.748859] Memory state around the buggy address: [ 43.749457] ffff888019f93800: fc fc fc fc fc fa fb fb fb fb fb fb fb fb fb fb [ 43.750336] ffff888019f93880: fb fb fb fb fb fb fb fb fb fb fc fc fc fc fc fc [ 43.751200] >ffff888019f93900: fc fc fa fb fb fb fb fb fb fb fb fb fb fb fb fb [ 43.752090] ^ [ 43.752886] ffff888019f93980: fb fb fb fb fb fb fb fc fc fc fc fc fc fc fc 00 [ 43.753744] ffff888019f93a00: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 [ 43.754598] ================================================================== [ 43.755635] Disabling lock debugging due to kernel taint [ 45.686741] BUG: Bad rss-counter state mm:000000005b38d353 type:MM_FILEPAGES val:33 [ 45.688046] BUG: Bad rss-counter state mm:000000005b38d353 type:MM_ANONPAGES val:22 [ 46.102359] BUG: Bad rss-counter state mm:00000000265221b6 type:MM_FILEPAGES val:33 [ 46.103183] BUG: Bad rss-counter state mm:00000000265221b6 type:MM_ANONPAGES val:22 Warning: Permanently added '[localhost]:53724' (ECDSA) to the list of known hosts. 2023/06/20 00:07:43 fuzzer started 2023/06/20 00:07:44 dialing manager at localhost:44161 2023/06/20 00:07:44 checking machine... 2023/06/20 00:07:44 checking revisions... [ 46.895199] kmemleak: Automatic memory scanning thread ended 2023/06/20 00:07:44 testing simple program... [ 46.968869] cgroup: Unknown subsys name 'net' [ 47.059958] cgroup: Unknown subsys name 'rlimit' executing program executing program executing program VM DIAGNOSIS: 00:07:38 Registers: info registers vcpu 0 RAX=1ffffffff0bb2f15 RBX=ffffffff85d978a8 RCX=ffffffff8118ddc2 RDX=0000000000000000 RSI=ffffffff8609fada RDI=ffffffff85d97888 RBP=ffffffff85d978a8 RSP=ffff88806ce099e0 R8 =ffffffff8609fada R9 =ffff88806ce09ad8 R10=0000000000038001 R11=000000000000792d R12=ffffffff85d978ac R13=ffffffff85d97888 R14=ffffffff85d978a4 R15=dffffc0000000000 RIP=ffffffff8112fc7f RFL=00000212 [----A--] 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 00007f6f29671900 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=00007ffd62fce000 CR3=000000000e80e000 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=74696d7265705f6d61703d73726f746e XMM02=000000000000000000000000000000ff XMM03=5320444f4854454d5f54505952434e45 XMM04=40404040404040404040404040404040 XMM05=5a5a5a5a5a5a5a5a5a5a5a5a5a5a5a5a XMM06=20202020202020202020202020202020 XMM07=00000000000000000000000000000000 XMM08=61662029286e65706f5f746964756100 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=ffff888008c58400 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=00007f386b6698e0 CR3=0000000019de0000 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=2033343a37303a3030203032206e754a XMM01=73732878696e755f6d6170203a5d3932 XMM02=65736f6c63206e6f6973736573203a29 XMM03=755f6d6170203a5d3932325b64687373 XMM04=69662068637573206f4e203a656c6163 XMM05=3a656c696620766e65206e65706f206f XMM06=65733a6468737328766e655f6d617020 XMM07=6b7a79732033343a37303a3030203032 XMM08=3d656e696c646d632022656369767265 XMM09=00000000000000000000000000000000 XMM10=00000000000000000000000000000000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000