syzkaller login: [ 24.019359] BUG: Bad rss-counter state mm:00000000dd889b71 type:MM_FILEPAGES val:33 [ 24.020189] BUG: Bad rss-counter state mm:00000000dd889b71 type:MM_ANONPAGES val:22 [ 24.169211] ================================================================== [ 24.169890] BUG: KASAN: slab-use-after-free in vma_interval_tree_remove+0xc75/0xec0 [ 24.170591] Read of size 8 at addr ffff888009a3d4e0 by task sshd/220 [ 24.171148] [ 24.171315] CPU: 0 PID: 220 Comm: sshd Not tainted 6.4.0-rc7-next-20230620 #1 [ 24.171942] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS 1.12.0-1 04/01/2014 [ 24.172658] Call Trace: [ 24.172885] [ 24.173184] dump_stack_lvl+0x91/0xf0 [ 24.173554] print_report+0xcc/0x620 [ 24.173916] ? __virt_addr_valid+0x102/0x340 [ 24.174321] ? vma_interval_tree_remove+0xc75/0xec0 [ 24.174799] ? vma_interval_tree_remove+0xc75/0xec0 [ 24.175253] kasan_report+0xbe/0xf0 [ 24.175604] ? vma_interval_tree_remove+0xc75/0xec0 [ 24.176064] vma_interval_tree_remove+0xc75/0xec0 [ 24.176511] vma_prepare+0xc54/0x11a0 [ 24.176871] __split_vma+0x5af/0x950 [ 24.177219] ? __pfx___split_vma+0x10/0x10 [ 24.177611] ? find_held_lock+0x2c/0x110 [ 24.177996] do_vmi_align_munmap+0x2ba/0x11f0 [ 24.178413] ? lock_is_held_type+0x9f/0x120 [ 24.178818] ? __pfx_do_vmi_align_munmap+0x10/0x10 [ 24.179270] ? mtree_range_walk+0x632/0x900 [ 24.179686] ? mas_walk+0x5c7/0x7c0 [ 24.180040] do_vmi_munmap+0x1f1/0x2b0 [ 24.180410] mmap_region+0x1f9/0x2660 [ 24.180764] ? vm_mmap_pgoff+0x15c/0x3a0 [ 24.181139] ? __pfx_arch_get_unmapped_area_topdown+0x10/0x10 [ 24.181664] ? __pfx_lock_acquire+0x10/0x10 [ 24.182057] ? __pfx_mmap_region+0x10/0x10 [ 24.182477] ? security_mmap_addr+0x7d/0xa0 [ 24.182880] ? get_unmapped_area+0x1f5/0x3f0 [ 24.183287] do_mmap+0x854/0xf00 [ 24.183613] vm_mmap_pgoff+0x1a6/0x3a0 [ 24.183985] ? __pfx_vm_mmap_pgoff+0x10/0x10 [ 24.184395] ksys_mmap_pgoff+0x3af/0x500 [ 24.184769] do_syscall_64+0x3f/0x90 [ 24.185130] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 24.185606] RIP: 0033:0x7f714f5cfd82 [ 24.185951] 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 [ 24.187536] RSP: 002b:00007ffc12e30078 EFLAGS: 00000206 ORIG_RAX: 0000000000000009 [ 24.188225] RAX: ffffffffffffffda RBX: 0000000000000812 RCX: 00007f714f5cfd82 [ 24.188866] RDX: 0000000000000005 RSI: 0000000000001000 RDI: 00007f714ea09000 [ 24.189504] RBP: 00007f714ea09000 R08: 0000000000000009 R09: 0000000000001000 [ 24.190140] R10: 0000000000000812 R11: 0000000000000206 R12: 000055963f534980 [ 24.190815] R13: 00007ffc12e30090 R14: 00007ffc12e300c0 R15: 00007ffc12e30420 [ 24.191480] [ 24.191706] [ 24.191871] Allocated by task 213: [ 24.192208] kasan_save_stack+0x22/0x50 [ 24.192601] kasan_set_track+0x25/0x30 [ 24.192989] __kasan_slab_alloc+0x59/0x70 [ 24.193399] kmem_cache_alloc+0x16b/0x370 [ 24.193807] vm_area_dup+0x20/0x160 [ 24.194156] __split_vma+0x170/0x950 [ 24.194527] split_vma+0xc6/0x110 [ 24.194865] mprotect_fixup+0x8d2/0xb30 [ 24.195253] do_mprotect_pkey+0x87e/0xd40 [ 24.195644] __x64_sys_mprotect+0x78/0xc0 [ 24.196035] do_syscall_64+0x3f/0x90 [ 24.196395] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 24.196879] [ 24.197046] Freed by task 213: [ 24.197339] kasan_save_stack+0x22/0x50 [ 24.197740] kasan_set_track+0x25/0x30 [ 24.198115] kasan_save_free_info+0x2b/0x50 [ 24.198556] __kasan_slab_free+0x10a/0x190 [ 24.198974] kmem_cache_free+0x10d/0x4d0 [ 24.199367] rcu_core+0x8c8/0x2860 [ 24.199721] __do_softirq+0x1b7/0x7d4 [ 24.200103] [ 24.200267] Last potentially related work creation: [ 24.200713] kasan_save_stack+0x22/0x50 [ 24.201091] __kasan_record_aux_stack+0x8e/0xa0 [ 24.201525] __call_rcu_common.constprop.0+0x6a/0xb90 [ 24.202015] remove_vma+0x139/0x170 [ 24.202356] do_vmi_align_munmap+0xd4a/0x11f0 [ 24.202793] do_vmi_munmap+0x1f1/0x2b0 [ 24.203177] __vm_munmap+0x138/0x3a0 [ 24.203526] __x64_sys_munmap+0x59/0x80 [ 24.203903] do_syscall_64+0x3f/0x90 [ 24.204254] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 24.204742] [ 24.204911] Second to last potentially related work creation: [ 24.205443] kasan_save_stack+0x22/0x50 [ 24.205824] __kasan_record_aux_stack+0x8e/0xa0 [ 24.206264] __call_rcu_common.constprop.0+0x6a/0xb90 [ 24.206692] remove_vma+0x139/0x170 [ 24.206956] do_vmi_align_munmap+0xd4a/0x11f0 [ 24.207277] do_vmi_munmap+0x1f1/0x2b0 [ 24.207557] mmap_region+0x1f9/0x2660 [ 24.207831] do_mmap+0x854/0xf00 [ 24.208079] vm_mmap_pgoff+0x1a6/0x3a0 [ 24.208365] ksys_mmap_pgoff+0x3af/0x500 [ 24.208657] do_syscall_64+0x3f/0x90 [ 24.208930] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 24.209299] [ 24.209424] The buggy address belongs to the object at ffff888009a3d488 [ 24.209424] which belongs to the cache vm_area_struct of size 168 [ 24.210276] The buggy address is located 88 bytes inside of [ 24.210276] freed 168-byte region [ffff888009a3d488, ffff888009a3d530) [ 24.211095] [ 24.211220] The buggy address belongs to the physical page: [ 24.211602] page:000000009f2a0705 refcount:1 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0x9a3d [ 24.212231] memcg:ffff88800c9ed101 [ 24.212485] anon flags: 0x100000000000200(slab|node=0|zone=1) [ 24.212897] page_type: 0xffffffff() [ 24.213159] raw: 0100000000000200 ffff8880087a0c80 ffffea00003821c0 dead000000000007 [ 24.213698] raw: 0000000000000000 0000000000110011 00000001ffffffff ffff88800c9ed101 [ 24.214225] page dumped because: kasan: bad access detected [ 24.214635] [ 24.214756] Memory state around the buggy address: [ 24.215089] ffff888009a3d380: fc fc fc fc fa fb fb fb fb fb fb fb fb fb fb fb [ 24.215581] ffff888009a3d400: fb fb fb fb fb fb fb fb fb fc fc fc fc fc fc fc [ 24.216085] >ffff888009a3d480: fc fa fb fb fb fb fb fb fb fb fb fb fb fb fb fb [ 24.216591] ^ [ 24.217033] ffff888009a3d500: fb fb fb fb fb fb fc fc fc fc fc fc fc fc fa fb [ 24.217528] ffff888009a3d580: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb [ 24.218023] ================================================================== [ 24.218695] Disabling lock debugging due to kernel taint [ 25.418114] BUG: Bad rss-counter state mm:00000000af56c6cb type:MM_FILEPAGES val:33 [ 25.419251] BUG: Bad rss-counter state mm:00000000af56c6cb type:MM_ANONPAGES val:22 [ 25.869143] BUG: Bad rss-counter state mm:00000000fefee1f5 type:MM_FILEPAGES val:33 [ 25.870205] BUG: Bad rss-counter state mm:00000000fefee1f5 type:MM_ANONPAGES val:22 Warning: Permanently added '[localhost]:17794' (ECDSA) to the list of known hosts. 2023/06/21 08:24:21 fuzzer started 2023/06/21 08:24:21 dialing manager at localhost:36067 2023/06/21 08:24:21 checking machine... 2023/06/21 08:24:21 checking revisions... [ 26.625662] kmemleak: Automatic memory scanning thread ended 2023/06/21 08:24:21 testing simple program... [ 26.668807] cgroup: Unknown subsys name 'net' [ 26.704424] cgroup: Unknown subsys name 'rlimit' executing program executing program executing program VM DIAGNOSIS: 08:24:21 Registers: info registers vcpu 0 RAX=0000000000000000 RBX=0000000000000000 RCX=0000000000000000 RDX=0000000000000cc0 RSI=ffff88800e82e140 RDI=00000000000000e8 RBP=ffff888008fae000 RSP=ffff88801cd5f7f0 R8 =0000000000042a50 R9 =0000000000000000 R10=ffffed1001d05c28 R11=ffff88800e82e140 R12=ffff88800e82e140 R13=0000000000000cc0 R14=0000000000000cc0 R15=0000000000000cc0 RIP=ffffffff8180f56b 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 00007fe57cc33900 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=00007ffc4daff000 CR3=0000000018960000 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=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 info registers vcpu 1 RAX=0000000080010002 RBX=0000000000000019 RCX=ffffffff813fee2e RDX=ffff888008d951c0 RSI=0000000000000000 RDI=0000000000000006 RBP=ffffffff87b6c480 RSP=ffff88806cf09c78 R8 =0000000000000006 R9 =003b9aca00000000 R10=002cf6fd7d51c0d0 R11=ffff88806cf09ff8 R12=002cf6fd7d51c0d0 R13=003b9aca00000000 R14=000000003b9aca00 R15=ffffffff87b6c4a8 RIP=ffffffff814c086b RFL=00000006 [-----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=00007f35e88c58c0 CR3=000000000ef36000 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=2030323a34323a3830203132206e754a XMM01=73732878696e755f6d6170203a5d3932 XMM02=65736f6c63206e6f6973736573203a29 XMM03=755f6d6170203a5d3932325b64687373 XMM04=69662068637573206f4e203a656c6163 XMM05=3a656c696620766e65206e65706f206f XMM06=65733a6468737328766e655f6d617020 XMM07=6b7a79732030323a34323a3830203132 XMM08=3d656e696c646d632022656369767265 XMM09=00000000000000000000000000000000 XMM10=00000000000000000000000000000000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000