syzkaller login: [ 28.664338] BUG: Bad rss-counter state mm:0000000072102ba4 type:MM_FILEPAGES val:33 [ 28.665551] BUG: Bad rss-counter state mm:0000000072102ba4 type:MM_ANONPAGES val:22 [ 28.857071] ================================================================== [ 28.857995] BUG: KASAN: slab-use-after-free in vma_interval_tree_remove+0xc75/0xec0 [ 28.858948] Read of size 8 at addr ffff88800d96c6b0 by task sshd/220 [ 28.859781] [ 28.860000] CPU: 0 PID: 220 Comm: sshd Not tainted 6.4.0-rc7-next-20230620 #1 [ 28.860896] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS 1.12.0-1 04/01/2014 [ 28.861911] Call Trace: [ 28.862235] [ 28.862525] dump_stack_lvl+0x91/0xf0 [ 28.863016] print_report+0xcc/0x620 [ 28.863513] ? __virt_addr_valid+0x102/0x340 [ 28.864064] ? vma_interval_tree_remove+0xc75/0xec0 [ 28.864692] ? vma_interval_tree_remove+0xc75/0xec0 [ 28.865321] kasan_report+0xbe/0xf0 [ 28.865805] ? vma_interval_tree_remove+0xc75/0xec0 [ 28.866430] vma_interval_tree_remove+0xc75/0xec0 [ 28.867028] vma_prepare+0xc54/0x11a0 [ 28.867504] __split_vma+0x5af/0x950 [ 28.867974] ? __pfx___split_vma+0x10/0x10 [ 28.868504] ? find_held_lock+0x2c/0x110 [ 28.869040] do_vmi_align_munmap+0x2ba/0x11f0 [ 28.869606] ? lock_is_held_type+0x9f/0x120 [ 28.870146] ? __pfx_do_vmi_align_munmap+0x10/0x10 [ 28.870750] ? mtree_range_walk+0x632/0x900 [ 28.871313] ? mas_walk+0x5c7/0x7c0 [ 28.871800] do_vmi_munmap+0x1f1/0x2b0 [ 28.872298] mmap_region+0x1f9/0x2660 [ 28.872798] ? vm_mmap_pgoff+0x15c/0x3a0 [ 28.873317] ? __pfx_arch_get_unmapped_area_topdown+0x10/0x10 [ 28.874033] ? __pfx_lock_acquire+0x10/0x10 [ 28.874577] ? __pfx_mmap_region+0x10/0x10 [ 28.875109] ? security_mmap_addr+0x7d/0xa0 [ 28.875637] ? get_unmapped_area+0x1f5/0x3f0 [ 28.876187] do_mmap+0x854/0xf00 [ 28.876620] vm_mmap_pgoff+0x1a6/0x3a0 [ 28.877121] ? __pfx_vm_mmap_pgoff+0x10/0x10 [ 28.877698] ksys_mmap_pgoff+0x3af/0x500 [ 28.878203] do_syscall_64+0x3f/0x90 [ 28.878677] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 28.879325] RIP: 0033:0x7f57cc0ded82 [ 28.879785] 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 [ 28.881921] RSP: 002b:00007fff05215ff8 EFLAGS: 00000206 ORIG_RAX: 0000000000000009 [ 28.882841] RAX: ffffffffffffffda RBX: 0000000000000812 RCX: 00007f57cc0ded82 [ 28.883686] RDX: 0000000000000005 RSI: 0000000000001000 RDI: 00007f57cb518000 [ 28.884533] RBP: 00007f57cb518000 R08: 0000000000000009 R09: 0000000000001000 [ 28.885381] R10: 0000000000000812 R11: 0000000000000206 R12: 00005641d1094d90 [ 28.886220] R13: 00007fff05216010 R14: 00007fff05216040 R15: 00007fff052163a0 [ 28.887071] [ 28.887364] [ 28.887581] Allocated by task 211: [ 28.888007] kasan_save_stack+0x22/0x50 [ 28.888517] kasan_set_track+0x25/0x30 [ 28.889035] __kasan_slab_alloc+0x59/0x70 [ 28.889558] kmem_cache_alloc+0x16b/0x370 [ 28.890075] vm_area_dup+0x20/0x160 [ 28.890530] __split_vma+0x170/0x950 [ 28.891008] split_vma+0xc6/0x110 [ 28.891448] mprotect_fixup+0x8d2/0xb30 [ 28.891951] do_mprotect_pkey+0x87e/0xd40 [ 28.892473] __x64_sys_mprotect+0x78/0xc0 [ 28.893001] do_syscall_64+0x3f/0x90 [ 28.893490] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 28.894149] [ 28.894368] Freed by task 211: [ 28.894768] kasan_save_stack+0x22/0x50 [ 28.895271] kasan_set_track+0x25/0x30 [ 28.895769] kasan_save_free_info+0x2b/0x50 [ 28.896303] __kasan_slab_free+0x10a/0x190 [ 28.896862] kmem_cache_free+0x10d/0x4d0 [ 28.897377] rcu_core+0x8c8/0x2860 [ 28.897827] __do_softirq+0x1b7/0x7d4 [ 28.898310] [ 28.898529] Last potentially related work creation: [ 28.899119] kasan_save_stack+0x22/0x50 [ 28.899618] __kasan_record_aux_stack+0x8e/0xa0 [ 28.900194] __call_rcu_common.constprop.0+0x6a/0xb90 [ 28.900855] remove_vma+0x139/0x170 [ 28.901312] do_vmi_align_munmap+0xd4a/0x11f0 [ 28.901865] do_vmi_munmap+0x1f1/0x2b0 [ 28.902347] __vm_munmap+0x138/0x3a0 [ 28.902816] __x64_sys_munmap+0x59/0x80 [ 28.903313] do_syscall_64+0x3f/0x90 [ 28.903785] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 28.904427] [ 28.904645] The buggy address belongs to the object at ffff88800d96c658 [ 28.904645] which belongs to the cache vm_area_struct of size 168 [ 28.906115] The buggy address is located 88 bytes inside of [ 28.906115] freed 168-byte region [ffff88800d96c658, ffff88800d96c700) [ 28.907518] [ 28.907731] The buggy address belongs to the physical page: [ 28.908387] page:00000000892b92ca refcount:1 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0xd96c [ 28.909478] memcg:ffff88800e2e2301 [ 28.909899] flags: 0x100000000000200(slab|node=0|zone=1) [ 28.910550] page_type: 0xffffffff() [ 28.910994] raw: 0100000000000200 ffff8880087a0c80 ffffea00005b90c0 dead000000000004 [ 28.911913] raw: 0000000000000000 0000000000110011 00000001ffffffff ffff88800e2e2301 [ 28.912825] page dumped because: kasan: bad access detected [ 28.913480] [ 28.913696] Memory state around the buggy address: [ 28.914278] ffff88800d96c580: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb [ 28.915125] ffff88800d96c600: fb fb fb fc fc fc fc fc fc fc fc fa fb fb fb fb [ 28.915975] >ffff88800d96c680: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb [ 28.916831] ^ [ 28.917411] ffff88800d96c700: fc fc fc fc fc fc fc fc 00 00 00 00 00 00 00 00 [ 28.918263] ffff88800d96c780: 00 00 00 00 00 00 00 00 00 00 00 00 00 fc fc fc [ 28.919107] ================================================================== [ 28.920081] Disabling lock debugging due to kernel taint [ 30.830193] BUG: Bad rss-counter state mm:0000000011cb33f1 type:MM_FILEPAGES val:33 [ 30.831744] BUG: Bad rss-counter state mm:0000000011cb33f1 type:MM_ANONPAGES val:22 [ 31.326372] BUG: Bad rss-counter state mm:000000002f3ca1d7 type:MM_FILEPAGES val:33 [ 31.327411] BUG: Bad rss-counter state mm:000000002f3ca1d7 type:MM_ANONPAGES val:22 Warning: Permanently added '[localhost]:8497' (ECDSA) to the list of known hosts. 2023/06/21 03:47:36 fuzzer started 2023/06/21 03:47:36 dialing manager at localhost:36067 2023/06/21 03:47:36 checking machine... 2023/06/21 03:47:36 checking revisions... [ 32.050361] kmemleak: Automatic memory scanning thread ended 2023/06/21 03:47:36 testing simple program... [ 32.097715] cgroup: Unknown subsys name 'net' [ 32.139342] cgroup: Unknown subsys name 'rlimit' executing program executing program executing program VM DIAGNOSIS: 03:47:36 Registers: info registers vcpu 0 RAX=ffffffff814c8454 RBX=ffffffff85652b60 RCX=ffffffff814c84a1 RDX=ffffffff8542a6c0 RSI=0000000000000100 RDI=0000000000000005 RBP=0000000000000000 RSP=ffff88806ce09a08 R8 =0000000000000005 R9 =0000000000000000 R10=0000000000000000 R11=00000000000b54e7 R12=ffffffff86607dd4 R13=0000000000000000 R14=ffffffff8542a6c0 R15=ffff88800ddd3e00 RIP=ffffffff814c84a2 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=00007ffe8ab98928 CR3=00000000169ca000 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=2035333a37343a3330203132206e754a XMM01=73732878696e755f6d6170203a5d3832 XMM02=65736f6c63206e6f6973736573203a29 XMM03=755f6d6170203a5d3832325b64687373 XMM04=69662068637573206f4e203a656c6163 XMM05=3a656c696620766e65206e65706f206f XMM06=65733a6468737328766e655f6d617020 XMM07=6b7a79732035333a37343a3330203132 XMM08=3d656e696c646d632022656369767265 XMM09=00000000000000000000000000000000 XMM10=00000000000000000000000000000000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000 info registers vcpu 1 RAX=0000555b048a6b20 RBX=0000555b048c3f80 RCX=0000000000000000 RDX=0000000000000002 RSI=0000555b048d1f40 RDI=0000555b048a6b20 RBP=00007ffdff008210 RSP=00007ffdff0081a8 R8 =0000555b048d1f40 R9 =00007f3feaeb8be0 R10=0000000000000100 R11=0000000000000246 R12=0000000000000002 R13=0000555b048d1f41 R14=0000000000000002 R15=0000000000000000 RIP=00007f3feae5ca57 RFL=00000287 [--S--PC] CPL=3 II=0 A20=1 SMM=0 HLT=0 ES =0000 0000000000000000 00000000 00000000 CS =0033 0000000000000000 ffffffff 00a0fb00 DPL=3 CS64 [-RA] SS =002b 0000000000000000 ffffffff 00c0f300 DPL=3 DS [-WA] DS =0000 0000000000000000 00000000 00000000 FS =0000 00007f3fea906900 00000000 00000000 GS =0000 0000000000000000 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=00007ffdff002000 CR3=000000001698a000 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=0a0a0a0a0a0a0a0a0a0a0a0a0a0a0a0a XMM01=0000000000000000000000000000ff00 XMM02=00ff00000000000000000000000000ff XMM03=655f6d61702c7374696d696c5f6d6170 XMM04=3d6c616e696d72657420322e322e302e XMM05=3d656d616e74736f682022646873732f XMM06=746f6f72223d746363612078756e696c XMM07=6e655f6d61702c7374696d696c5f6d61 XMM08=6500273d2720676e6974636570786500 XMM09=00000000000000000000000000000000 XMM10=00000000000000000000000000000000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000