syzkaller login: [ 33.798492] BUG: Bad rss-counter state mm:000000000f747f8b type:MM_FILEPAGES val:33 [ 33.799668] BUG: Bad rss-counter state mm:000000000f747f8b type:MM_ANONPAGES val:22 [ 33.965322] ================================================================== [ 33.966229] BUG: KASAN: slab-use-after-free in vma_interval_tree_remove+0xc75/0xec0 [ 33.967170] Read of size 8 at addr ffff88800dcd7a50 by task sshd/220 [ 33.967939] [ 33.968167] CPU: 0 PID: 220 Comm: sshd Not tainted 6.4.0-rc7-next-20230619 #1 [ 33.969154] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS 1.12.0-1 04/01/2014 [ 33.970120] Call Trace: [ 33.970446] [ 33.970753] dump_stack_lvl+0x91/0xf0 [ 33.971250] print_report+0xcc/0x620 [ 33.971740] ? __virt_addr_valid+0x102/0x340 [ 33.972288] ? vma_interval_tree_remove+0xc75/0xec0 [ 33.972928] ? vma_interval_tree_remove+0xc75/0xec0 [ 33.973541] kasan_report+0xbe/0xf0 [ 33.974026] ? vma_interval_tree_remove+0xc75/0xec0 [ 33.974648] vma_interval_tree_remove+0xc75/0xec0 [ 33.975253] vma_prepare+0xc54/0x11a0 [ 33.975733] __split_vma+0x5af/0x950 [ 33.976212] ? __pfx___split_vma+0x10/0x10 [ 33.976754] ? find_held_lock+0x2c/0x110 [ 33.977362] do_vmi_align_munmap+0x2ba/0x11f0 [ 33.978022] ? lock_is_held_type+0x9f/0x120 [ 33.978633] ? __pfx_do_vmi_align_munmap+0x10/0x10 [ 33.979335] ? mtree_range_walk+0x632/0x900 [ 33.979972] ? mas_walk+0x5c7/0x7c0 [ 33.980554] do_vmi_munmap+0x1f1/0x2b0 [ 33.981107] mmap_region+0x1f9/0x2660 [ 33.981661] ? vm_mmap_pgoff+0x15c/0x3a0 [ 33.982270] ? __pfx_arch_get_unmapped_area_topdown+0x10/0x10 [ 33.983100] ? __pfx_lock_acquire+0x10/0x10 [ 33.983731] ? __pfx_mmap_region+0x10/0x10 [ 33.984340] ? security_mmap_addr+0x7d/0xa0 [ 33.984959] ? get_unmapped_area+0x1f5/0x3f0 [ 33.985507] do_mmap+0x854/0xf00 [ 33.985949] vm_mmap_pgoff+0x1a6/0x3a0 [ 33.986451] ? __pfx_vm_mmap_pgoff+0x10/0x10 [ 33.987016] ksys_mmap_pgoff+0x3af/0x500 [ 33.987525] do_syscall_64+0x3f/0x90 [ 33.988014] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 33.988684] RIP: 0033:0x7f7b69937d82 [ 33.989154] 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 [ 33.991297] RSP: 002b:00007ffd60b7a888 EFLAGS: 00000206 ORIG_RAX: 0000000000000009 [ 33.992216] RAX: ffffffffffffffda RBX: 0000000000000812 RCX: 00007f7b69937d82 [ 33.993118] RDX: 0000000000000005 RSI: 0000000000001000 RDI: 00007f7b68d71000 [ 33.993975] RBP: 00007f7b68d71000 R08: 0000000000000009 R09: 0000000000001000 [ 33.994833] R10: 0000000000000812 R11: 0000000000000206 R12: 000055981327aec0 [ 33.995687] R13: 00007ffd60b7a8a0 R14: 00007ffd60b7a8d0 R15: 00007ffd60b7ac30 [ 33.996573] [ 33.996865] [ 33.997088] Allocated by task 213: [ 33.997514] kasan_save_stack+0x22/0x50 [ 33.998028] kasan_set_track+0x25/0x30 [ 33.998521] __kasan_slab_alloc+0x59/0x70 [ 33.999041] kmem_cache_alloc+0x16b/0x370 [ 33.999560] vm_area_dup+0x20/0x160 [ 34.000016] __split_vma+0x170/0x950 [ 34.000494] split_vma+0xc6/0x110 [ 34.000972] mprotect_fixup+0x8d2/0xb30 [ 34.001580] do_mprotect_pkey+0x87e/0xd40 [ 34.002210] __x64_sys_mprotect+0x78/0xc0 [ 34.002850] do_syscall_64+0x3f/0x90 [ 34.003425] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 34.004215] [ 34.004481] Freed by task 213: [ 34.004966] kasan_save_stack+0x22/0x50 [ 34.005579] kasan_set_track+0x25/0x30 [ 34.006178] kasan_save_free_info+0x2b/0x50 [ 34.006823] __kasan_slab_free+0x10a/0x190 [ 34.007467] kmem_cache_free+0x10d/0x4d0 [ 34.008091] rcu_core+0x8c8/0x2860 [ 34.008679] __do_softirq+0x1b7/0x7d4 [ 34.009255] [ 34.009512] Last potentially related work creation: [ 34.010241] kasan_save_stack+0x22/0x50 [ 34.010854] __kasan_record_aux_stack+0x8e/0xa0 [ 34.011555] __call_rcu_common.constprop.0+0x6a/0xb90 [ 34.012334] remove_vma+0x139/0x170 [ 34.012888] do_vmi_align_munmap+0xd4a/0x11f0 [ 34.013568] do_vmi_munmap+0x1f1/0x2b0 [ 34.014159] __vm_munmap+0x138/0x3a0 [ 34.014730] __x64_sys_munmap+0x59/0x80 [ 34.015333] do_syscall_64+0x3f/0x90 [ 34.015912] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 34.016708] [ 34.016964] Second to last potentially related work creation: [ 34.017800] kasan_save_stack+0x22/0x50 [ 34.018412] __kasan_record_aux_stack+0x8e/0xa0 [ 34.019120] __call_rcu_common.constprop.0+0x6a/0xb90 [ 34.019888] remove_vma+0x139/0x170 [ 34.020436] do_vmi_align_munmap+0xd4a/0x11f0 [ 34.021083] do_vmi_munmap+0x1f1/0x2b0 [ 34.021636] mmap_region+0x1f9/0x2660 [ 34.022175] do_mmap+0x854/0xf00 [ 34.022675] vm_mmap_pgoff+0x1a6/0x3a0 [ 34.023224] ksys_mmap_pgoff+0x3af/0x500 [ 34.023806] do_syscall_64+0x3f/0x90 [ 34.024346] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 34.025112] [ 34.025362] The buggy address belongs to the object at ffff88800dcd79f8 [ 34.025362] which belongs to the cache vm_area_struct of size 168 [ 34.027065] The buggy address is located 88 bytes inside of [ 34.027065] freed 168-byte region [ffff88800dcd79f8, ffff88800dcd7aa0) [ 34.028728] [ 34.028978] The buggy address belongs to the physical page: [ 34.029735] page:000000006eaad556 refcount:1 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0xdcd7 [ 34.030991] memcg:ffff88800ed72c01 [ 34.031489] anon flags: 0x100000000000200(slab|node=0|zone=1) [ 34.032290] page_type: 0xffffffff() [ 34.032820] raw: 0100000000000200 ffff88800879fc80 ffffea0000398800 dead000000000003 [ 34.033887] raw: 0000000000000000 0000000000110011 00000001ffffffff ffff88800ed72c01 [ 34.034939] page dumped because: kasan: bad access detected [ 34.035705] [ 34.035954] Memory state around the buggy address: [ 34.036673] ffff88800dcd7900: fc fc 00 00 00 00 00 00 00 00 00 00 00 00 00 00 [ 34.037671] ffff88800dcd7980: 00 00 00 00 00 00 00 fc fc fc fc fc fc fc fc fa [ 34.038677] >ffff88800dcd7a00: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb [ 34.039655] ^ [ 34.040472] ffff88800dcd7a80: fb fb fb fb fc fc fc fc fc fc fc fc fa fb fb fb [ 34.041476] ffff88800dcd7b00: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb [ 34.042480] ================================================================== [ 34.043700] Disabling lock debugging due to kernel taint [ 36.137266] BUG: Bad rss-counter state mm:00000000cc2a0ab5 type:MM_FILEPAGES val:33 [ 36.139103] BUG: Bad rss-counter state mm:00000000cc2a0ab5 type:MM_ANONPAGES val:22 [ 36.517759] BUG: Bad rss-counter state mm:00000000802266c5 type:MM_FILEPAGES val:33 [ 36.518301] BUG: Bad rss-counter state mm:00000000802266c5 type:MM_ANONPAGES val:22 Warning: Permanently added '[localhost]:33814' (ECDSA) to the list of known hosts. 2023/06/20 10:03:46 fuzzer started 2023/06/20 10:03:47 dialing manager at localhost:44161 2023/06/20 10:03:47 checking machine... 2023/06/20 10:03:47 checking revisions... [ 37.131402] kmemleak: Automatic memory scanning thread ended 2023/06/20 10:03:47 testing simple program... [ 37.176648] cgroup: Unknown subsys name 'net' [ 37.231731] cgroup: Unknown subsys name 'rlimit' executing program executing program executing program VM DIAGNOSIS: 10:03:44 Registers: info registers vcpu 0 RAX=dffffc0000000000 RBX=0000000000000001 RCX=ffffffff812d869a RDX=1ffff1100d9c135e RSI=ffffffff8661f20f RDI=ffff88806ce09a98 RBP=ffff88806ce09af0 RSP=ffff88806ce09a28 R8 =0000000000000000 R9 =fffffbfff0ba77da R10=ffffffff85d3bed7 R11=00000000000b5420 R12=ffff88806ce09b60 R13=0000000000000000 R14=ffffffff8542a6c0 R15=ffff88806ce09a98 RIP=ffffffff8113062c 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 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=00007fb91e6e4000 CR3=000000000d838000 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=2036343a33303a3031203032206e754a XMM01=73732878696e755f6d6170203a5d3932 XMM02=65736f6c63206e6f6973736573203a29 XMM03=755f6d6170203a5d3932325b64687373 XMM04=69662068637573206f4e203a656c6163 XMM05=3a656c696620766e65206e65706f206f XMM06=65733a6468737328766e655f6d617020 XMM07=6b7a79732036343a33303a3031203032 XMM08=3d656e696c646d632022656369767265 XMM09=00000000000000000000000000000000 XMM10=00000000000000000000000000000000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000 info registers vcpu 1 RAX=0000000000000007 RBX=1ffff1100d9e13a8 RCX=0000000000000000 RDX=0000000000000000 RSI=ffffffff813edd25 RDI=ffff888015e31bac RBP=ffff888015e31b40 RSP=ffff88806cf09d38 R8 =0000000000000005 R9 =0000000000000000 R10=0000000000000000 R11=0000000000000001 R12=0000000000000078 R13=ffff88800d859440 R14=ffff888018127878 R15=ffffffffffffffff RIP=ffffffff813edd57 RFL=00000046 [---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 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=00007f8944056328 CR3=000000001808e000 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