syzkaller login: [ 38.815072] BUG: Bad rss-counter state mm:0000000081cb7fb2 type:MM_FILEPAGES val:33 [ 38.816144] BUG: Bad rss-counter state mm:0000000081cb7fb2 type:MM_ANONPAGES val:22 [ 38.971614] ================================================================== [ 38.972550] BUG: KASAN: slab-use-after-free in vma_interval_tree_remove+0xc75/0xec0 [ 38.973499] Read of size 8 at addr ffff88800d6cdb38 by task sshd/221 [ 38.974256] [ 38.974541] CPU: 1 PID: 221 Comm: sshd Not tainted 6.4.0-rc7-next-20230620 #1 [ 38.975478] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS 1.12.0-1 04/01/2014 [ 38.976438] Call Trace: [ 38.976756] <TASK> [ 38.977036] dump_stack_lvl+0x91/0xf0 [ 38.977543] print_report+0xcc/0x620 [ 38.978019] ? __virt_addr_valid+0x102/0x340 [ 38.978568] ? vma_interval_tree_remove+0xc75/0xec0 [ 38.979186] ? vma_interval_tree_remove+0xc75/0xec0 [ 38.979808] kasan_report+0xbe/0xf0 [ 38.980280] ? vma_interval_tree_remove+0xc75/0xec0 [ 38.980893] vma_interval_tree_remove+0xc75/0xec0 [ 38.981488] vma_prepare+0xc54/0x11a0 [ 38.981962] __split_vma+0x5af/0x950 [ 38.982431] ? __pfx___split_vma+0x10/0x10 [ 38.982954] ? find_held_lock+0x2c/0x110 [ 38.983484] do_vmi_align_munmap+0x2ba/0x11f0 [ 38.984057] ? lock_is_held_type+0x9f/0x120 [ 38.984592] ? __pfx_do_vmi_align_munmap+0x10/0x10 [ 38.985190] ? mtree_range_walk+0x632/0x900 [ 38.985737] ? mas_walk+0x5c7/0x7c0 [ 38.986210] do_vmi_munmap+0x1f1/0x2b0 [ 38.986710] mmap_region+0x1f9/0x2660 [ 38.987191] ? vm_mmap_pgoff+0x15c/0x3a0 [ 38.987729] ? __pfx_arch_get_unmapped_area_topdown+0x10/0x10 [ 38.988438] ? __pfx_lock_acquire+0x10/0x10 [ 38.988966] ? __pfx_mmap_region+0x10/0x10 [ 38.989493] ? security_mmap_addr+0x7d/0xa0 [ 38.990024] ? get_unmapped_area+0x1f5/0x3f0 [ 38.990572] do_mmap+0x854/0xf00 [ 38.991007] vm_mmap_pgoff+0x1a6/0x3a0 [ 38.991508] ? __pfx_vm_mmap_pgoff+0x10/0x10 [ 38.992068] ksys_mmap_pgoff+0x3af/0x500 [ 38.992580] do_syscall_64+0x3f/0x90 [ 38.993054] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 38.993693] RIP: 0033:0x7f90d6acad82 [ 38.994149] 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 [ 38.996250] RSP: 002b:00007ffc5c2958c8 EFLAGS: 00000206 ORIG_RAX: 0000000000000009 [ 38.997139] RAX: ffffffffffffffda RBX: 0000000000000812 RCX: 00007f90d6acad82 [ 38.997988] RDX: 0000000000000005 RSI: 0000000000001000 RDI: 00007f90d5f04000 [ 38.998824] RBP: 00007f90d5f04000 R08: 0000000000000009 R09: 0000000000001000 [ 38.999695] R10: 0000000000000812 R11: 0000000000000206 R12: 00005626d02f2ec0 [ 39.000529] R13: 00007ffc5c2958e0 R14: 00007ffc5c295910 R15: 00007ffc5c295c70 [ 39.001374] </TASK> [ 39.001661] [ 39.001874] Allocated by task 213: [ 39.002298] kasan_save_stack+0x22/0x50 [ 39.002796] kasan_set_track+0x25/0x30 [ 39.003282] __kasan_slab_alloc+0x59/0x70 [ 39.003810] kmem_cache_alloc+0x16b/0x370 [ 39.004316] vm_area_dup+0x20/0x160 [ 39.004775] __split_vma+0x170/0x950 [ 39.005240] split_vma+0xc6/0x110 [ 39.005672] mprotect_fixup+0x8d2/0xb30 [ 39.006167] do_mprotect_pkey+0x87e/0xd40 [ 39.006681] __x64_sys_mprotect+0x78/0xc0 [ 39.007206] do_syscall_64+0x3f/0x90 [ 39.007685] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 39.008321] [ 39.008536] Freed by task 213: [ 39.008923] kasan_save_stack+0x22/0x50 [ 39.009419] kasan_set_track+0x25/0x30 [ 39.009912] kasan_save_free_info+0x2b/0x50 [ 39.010435] __kasan_slab_free+0x10a/0x190 [ 39.010958] kmem_cache_free+0x10d/0x4d0 [ 39.011476] rcu_core+0x8c8/0x2860 [ 39.011915] __do_softirq+0x1b7/0x7d4 [ 39.012390] [ 39.012604] Last potentially related work creation: [ 39.013179] kasan_save_stack+0x22/0x50 [ 39.013679] __kasan_record_aux_stack+0x8e/0xa0 [ 39.014246] __call_rcu_common.constprop.0+0x6a/0xb90 [ 39.014886] remove_vma+0x139/0x170 [ 39.015332] do_vmi_align_munmap+0xd4a/0x11f0 [ 39.015887] do_vmi_munmap+0x1f1/0x2b0 [ 39.016366] __vm_munmap+0x138/0x3a0 [ 39.016824] __x64_sys_munmap+0x59/0x80 [ 39.017315] do_syscall_64+0x3f/0x90 [ 39.017785] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 39.018416] [ 39.018630] The buggy address belongs to the object at ffff88800d6cdae0 [ 39.018630] which belongs to the cache vm_area_struct of size 168 [ 39.020102] The buggy address is located 88 bytes inside of [ 39.020102] freed 168-byte region [ffff88800d6cdae0, ffff88800d6cdb88) [ 39.021488] [ 39.021701] The buggy address belongs to the physical page: [ 39.022360] page:00000000c98beb0e refcount:1 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0xd6cd [ 39.023431] memcg:ffff88800e134701 [ 39.023851] anon flags: 0x100000000000200(slab|node=0|zone=1) [ 39.024540] page_type: 0xffffffff() [ 39.024984] raw: 0100000000000200 ffff8880087a0c80 ffffea0000373b80 dead000000000007 [ 39.025887] raw: 0000000000000000 0000000000110011 00000001ffffffff ffff88800e134701 [ 39.026784] page dumped because: kasan: bad access detected [ 39.027458] [ 39.027672] Memory state around the buggy address: [ 39.028247] ffff88800d6cda00: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 [ 39.029091] ffff88800d6cda80: 00 00 00 00 fc fc fc fc fc fc fc fc fa fb fb fb [ 39.029939] >ffff88800d6cdb00: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb [ 39.030778] ^ [ 39.031379] ffff88800d6cdb80: fb fc fc fc fc fc fc fc fc fa fb fb fb fb fb fb [ 39.032239] ffff88800d6cdc00: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fc fc [ 39.033088] ================================================================== [ 39.034440] Disabling lock debugging due to kernel taint [ 42.050899] BUG: Bad rss-counter state mm:00000000e52957b8 type:MM_FILEPAGES val:33 [ 42.051977] BUG: Bad rss-counter state mm:00000000e52957b8 type:MM_ANONPAGES val:22 [ 42.556219] BUG: Bad rss-counter state mm:00000000b0cf674a type:MM_FILEPAGES val:33 [ 42.557309] BUG: Bad rss-counter state mm:00000000b0cf674a type:MM_ANONPAGES val:22 Warning: Permanently added '[localhost]:57327' (ECDSA) to the list of known hosts. 2023/06/21 08:26:29 fuzzer started 2023/06/21 08:26:29 dialing manager at localhost:36067 2023/06/21 08:26:30 checking machine... 2023/06/21 08:26:30 checking revisions... [ 43.299892] kmemleak: Automatic memory scanning thread ended 2023/06/21 08:26:30 testing simple program... [ 43.341644] cgroup: Unknown subsys name 'net' [ 43.391747] cgroup: Unknown subsys name 'rlimit' executing program executing program executing program VM DIAGNOSIS: 08:26:29 Registers: info registers vcpu 0 RAX=0000000000000007 RBX=ffff88800ffd6000 RCX=0000000000000000 RDX=0000000000000c40 RSI=ffff888019bf9c60 RDI=ffff88800ffd6000 RBP=0000000000000000 RSP=ffff888018347a00 R8 =0000000000000005 R9 =0000000000000000 R10=0000000000000000 R11=00000000000b6a61 R12=0000000000000008 R13=0000000000000c40 R14=ffff888019bf9c60 R15=ffffffff87f3e160 RIP=ffffffff81c60382 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 00007ff9e6a22700 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=00007f26740850b0 CR3=000000000fd0e000 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=2039323a36323a3830203132206e754a XMM01=73732878696e755f6d6170203a5d3133 XMM02=65736f6c63206e6f6973736573203a29 XMM03=755f6d6170203a5d3133325b64687373 XMM04=69662068637573206f4e203a656c6163 XMM05=3a656c696620766e65206e65706f206f XMM06=65733a6468737328766e655f6d617020 XMM07=6b7a79732039323a36323a3830203132 XMM08=3d656e696c646d632022656369767265 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=00007f517000f340 CR3=000000000c5a6000 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=485f5dd833d8b1ac7c445826e626d49c XMM02=000000000011a908eff9b2d0a8fce9cb XMM03=000000000011a9d82c67c8bc2e329bc3 XMM04=514cbc6a2b4954e600000000000ae988 XMM05=59d5b690e0af863b00000000001318a8 XMM06=00c3ffa147b8d8570000000000131730 XMM07=e042d86d42eb936e0000000000121598 XMM08=42a7feda76b398cf000000000011a9d8 XMM09=00000000000000000000000000000000 XMM10=00000000000000000000000000000000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000