syzkaller login: [ 30.487094] BUG: Bad rss-counter state mm:00000000045c3913 type:MM_FILEPAGES val:33 [ 30.488496] BUG: Bad rss-counter state mm:00000000045c3913 type:MM_ANONPAGES val:22 [ 30.605236] ================================================================== [ 30.606053] BUG: KASAN: slab-use-after-free in vma_interval_tree_remove+0xc75/0xec0 [ 30.606918] Read of size 8 at addr ffff888017dc7968 by task sshd/220 [ 30.607621] [ 30.607886] CPU: 0 PID: 220 Comm: sshd Not tainted 6.4.0-rc7-next-20230620 #1 [ 30.608683] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS 1.12.0-1 04/01/2014 [ 30.609585] Call Trace: [ 30.609884] [ 30.610157] dump_stack_lvl+0x91/0xf0 [ 30.610604] print_report+0xcc/0x620 [ 30.611038] ? __virt_addr_valid+0x102/0x340 [ 30.611526] ? vma_interval_tree_remove+0xc75/0xec0 [ 30.612076] ? vma_interval_tree_remove+0xc75/0xec0 [ 30.612637] kasan_report+0xbe/0xf0 [ 30.613067] ? vma_interval_tree_remove+0xc75/0xec0 [ 30.613552] vma_interval_tree_remove+0xc75/0xec0 [ 30.614028] vma_prepare+0xc54/0x11a0 [ 30.614415] __split_vma+0x5af/0x950 [ 30.614795] ? __pfx___split_vma+0x10/0x10 [ 30.615217] ? find_held_lock+0x2c/0x110 [ 30.615628] do_vmi_align_munmap+0x2ba/0x11f0 [ 30.616068] ? lock_is_held_type+0x9f/0x120 [ 30.616500] ? __pfx_do_vmi_align_munmap+0x10/0x10 [ 30.616981] ? mtree_range_walk+0x632/0x900 [ 30.617424] ? mas_walk+0x5c7/0x7c0 [ 30.617801] do_vmi_munmap+0x1f1/0x2b0 [ 30.618183] mmap_region+0x1f9/0x2660 [ 30.618560] ? vm_mmap_pgoff+0x15c/0x3a0 [ 30.618966] ? __pfx_arch_get_unmapped_area_topdown+0x10/0x10 [ 30.619535] ? __pfx_lock_acquire+0x10/0x10 [ 30.619955] ? __pfx_mmap_region+0x10/0x10 [ 30.620373] ? security_mmap_addr+0x7d/0xa0 [ 30.620801] ? get_unmapped_area+0x1f5/0x3f0 [ 30.621233] do_mmap+0x854/0xf00 [ 30.621577] vm_mmap_pgoff+0x1a6/0x3a0 [ 30.621973] ? __pfx_vm_mmap_pgoff+0x10/0x10 [ 30.622415] ksys_mmap_pgoff+0x3af/0x500 [ 30.622816] do_syscall_64+0x3f/0x90 [ 30.623196] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 30.623704] RIP: 0033:0x7f42bbf8bd82 [ 30.624065] 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 [ 30.625776] RSP: 002b:00007ffc83b16808 EFLAGS: 00000206 ORIG_RAX: 0000000000000009 [ 30.626507] RAX: ffffffffffffffda RBX: 0000000000000812 RCX: 00007f42bbf8bd82 [ 30.627177] RDX: 0000000000000005 RSI: 0000000000001000 RDI: 00007f42bb3c5000 [ 30.627855] RBP: 00007f42bb3c5000 R08: 0000000000000009 R09: 0000000000001000 [ 30.628541] R10: 0000000000000812 R11: 0000000000000206 R12: 000055b1c8441b20 [ 30.629228] R13: 00007ffc83b16820 R14: 00007ffc83b16850 R15: 00007ffc83b16bb0 [ 30.629910] [ 30.630141] [ 30.630308] Allocated by task 213: [ 30.630654] kasan_save_stack+0x22/0x50 [ 30.631058] kasan_set_track+0x25/0x30 [ 30.631453] __kasan_slab_alloc+0x59/0x70 [ 30.631874] kmem_cache_alloc+0x16b/0x370 [ 30.632279] vm_area_dup+0x20/0x160 [ 30.632647] __split_vma+0x170/0x950 [ 30.633023] split_vma+0xc6/0x110 [ 30.633377] mprotect_fixup+0x8d2/0xb30 [ 30.633780] do_mprotect_pkey+0x87e/0xd40 [ 30.634190] __x64_sys_mprotect+0x78/0xc0 [ 30.634602] do_syscall_64+0x3f/0x90 [ 30.634979] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 30.635486] [ 30.635655] Freed by task 19: [ 30.635960] kasan_save_stack+0x22/0x50 [ 30.636350] kasan_set_track+0x25/0x30 [ 30.636692] kasan_save_free_info+0x2b/0x50 [ 30.637028] __kasan_slab_free+0x10a/0x190 [ 30.637360] kmem_cache_free+0x10d/0x4d0 [ 30.637674] rcu_core+0x8c8/0x2860 [ 30.637955] __do_softirq+0x1b7/0x7d4 [ 30.638254] [ 30.638389] Last potentially related work creation: [ 30.638748] kasan_save_stack+0x22/0x50 [ 30.639064] __kasan_record_aux_stack+0x8e/0xa0 [ 30.639424] __call_rcu_common.constprop.0+0x6a/0xb90 [ 30.639825] remove_vma+0x139/0x170 [ 30.640107] do_vmi_align_munmap+0xd4a/0x11f0 [ 30.640452] do_vmi_munmap+0x1f1/0x2b0 [ 30.640762] __vm_munmap+0x138/0x3a0 [ 30.641053] __x64_sys_munmap+0x59/0x80 [ 30.641359] do_syscall_64+0x3f/0x90 [ 30.641657] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 30.642061] [ 30.642196] Second to last potentially related work creation: [ 30.642620] kasan_save_stack+0x22/0x50 [ 30.642934] __kasan_record_aux_stack+0x8e/0xa0 [ 30.643293] __call_rcu_common.constprop.0+0x6a/0xb90 [ 30.643690] remove_vma+0x139/0x170 [ 30.643970] do_vmi_align_munmap+0xd4a/0x11f0 [ 30.644320] do_vmi_munmap+0x1f1/0x2b0 [ 30.644815] mmap_region+0x1f9/0x2660 [ 30.645367] do_mmap+0x854/0xf00 [ 30.645846] vm_mmap_pgoff+0x1a6/0x3a0 [ 30.646407] ksys_mmap_pgoff+0x3af/0x500 [ 30.646967] do_syscall_64+0x3f/0x90 [ 30.647502] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 30.648229] [ 30.648488] The buggy address belongs to the object at ffff888017dc7910 [ 30.648488] which belongs to the cache vm_area_struct of size 168 [ 30.650153] The buggy address is located 88 bytes inside of [ 30.650153] freed 168-byte region [ffff888017dc7910, ffff888017dc79b8) [ 30.651670] [ 30.651887] The buggy address belongs to the physical page: [ 30.652554] page:0000000062f38972 refcount:1 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0x17dc7 [ 30.653614] memcg:ffff888017dd6301 [ 30.654033] flags: 0x100000000000200(slab|node=0|zone=1) [ 30.654658] page_type: 0xffffffff() [ 30.655103] raw: 0100000000000200 ffff8880087a0c80 ffffea0000331180 dead000000000004 [ 30.655995] raw: 0000000000000000 0000000000110011 00000001ffffffff ffff888017dd6301 [ 30.656898] page dumped because: kasan: bad access detected [ 30.657542] [ 30.657751] Memory state around the buggy address: [ 30.658327] ffff888017dc7800: fc fc fc fc fc fa fb fb fb fb fb fb fb fb fb fb [ 30.659174] ffff888017dc7880: fb fb fb fb fb fb fb fb fb fb fc fc fc fc fc fc [ 30.660021] >ffff888017dc7900: fc fc fa fb fb fb fb fb fb fb fb fb fb fb fb fb [ 30.660867] ^ [ 30.661640] ffff888017dc7980: fb fb fb fb fb fb fb fc fc fc fc fc fc fc fc fa [ 30.662488] ffff888017dc7a00: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb [ 30.663323] ================================================================== [ 30.664364] Disabling lock debugging due to kernel taint [ 32.552078] BUG: Bad rss-counter state mm:00000000c82b8bf8 type:MM_FILEPAGES val:33 [ 32.553296] BUG: Bad rss-counter state mm:00000000c82b8bf8 type:MM_ANONPAGES val:22 [ 32.980601] BUG: Bad rss-counter state mm:00000000e9e0ba81 type:MM_FILEPAGES val:33 [ 32.981950] BUG: Bad rss-counter state mm:00000000e9e0ba81 type:MM_ANONPAGES val:22 Warning: Permanently added '[localhost]:41496' (ECDSA) to the list of known hosts. 2023/06/21 06:19:15 fuzzer started 2023/06/21 06:19:15 dialing manager at localhost:36067 2023/06/21 06:19:15 checking machine... 2023/06/21 06:19:15 checking revisions... [ 33.696279] kmemleak: Automatic memory scanning thread ended 2023/06/21 06:19:15 testing simple program... [ 33.746458] cgroup: Unknown subsys name 'net' [ 33.812054] cgroup: Unknown subsys name 'rlimit' executing program executing program executing program VM DIAGNOSIS: 06:19:14 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=00007f2ea0524618 CR3=000000000fbcc000 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=2034313a39313a3630203132206e754a XMM01=73732878696e755f6d6170203a5d3932 XMM02=65736f6c63206e6f6973736573203a29 XMM03=755f6d6170203a5d3932325b64687373 XMM04=69662068637573206f4e203a656c6163 XMM05=3a656c696620766e65206e65706f206f XMM06=65733a6468737328766e655f6d617020 XMM07=6b7a79732034313a39313a3630203132 XMM08=3d656e696c646d632022656369767265 XMM09=00000000000000000000000000000000 XMM10=00000000000000000000000000000000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000 info registers vcpu 1 RAX=00000000c12ea823 RBX=00000000cb2909e5 RCX=ffff888014607be4 RDX=0000000000000009 RSI=000000000000000f RDI=00000000f6059e3e RBP=0000000000000001 RSP=ffff888014607b70 R8 =00000000a242c99e R9 =fffffbfff0ba7a6a R10=ffffffff85d3d357 R11=00000000000b6a61 R12=0000000000000001 R13=0000000000000000 R14=ffff888014607bd8 R15=0000000000000009 RIP=ffffffff82270479 RFL=00000293 [--S-A-C] 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 00007f2e9ff6d900 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=00007ffc467d5000 CR3=000000001a3d8000 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=635f6e6f69737365733a4d41503d706f XMM01=6f6c5f6d61702c78756e696c65735f6d XMM02=61702c74696d7265705f6d61702c7469 XMM03=655f6d61702c7374696d696c5f6d6170 XMM04=3d6c616e696d72657420322e322e302e XMM05=3d656d616e74736f682022646873732f XMM06=746f6f72223d746363612078756e696c XMM07=6e655f6d61702c7374696d696c5f6d61 XMM08=652075253d64692073253d706f000000 XMM09=00000000000000000000000000000000 XMM10=00000000000000000000000000000000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000