syzkaller login: [ 31.289275] BUG: Bad rss-counter state mm:000000001c82d668 type:MM_FILEPAGES val:33 [ 31.290258] BUG: Bad rss-counter state mm:000000001c82d668 type:MM_ANONPAGES val:22 [ 31.460812] ================================================================== [ 31.461718] BUG: KASAN: slab-use-after-free in vma_interval_tree_remove+0xc75/0xec0 [ 31.462665] Read of size 8 at addr ffff88800de934e0 by task sshd/221 [ 31.463427] [ 31.463740] CPU: 0 PID: 221 Comm: sshd Not tainted 6.4.0-rc7-next-20230619 #1 [ 31.464626] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS 1.12.0-1 04/01/2014 [ 31.465603] Call Trace: [ 31.465944] [ 31.466223] dump_stack_lvl+0x91/0xf0 [ 31.466719] print_report+0xcc/0x620 [ 31.467201] ? __virt_addr_valid+0x102/0x340 [ 31.467748] ? vma_interval_tree_remove+0xc75/0xec0 [ 31.468361] ? vma_interval_tree_remove+0xc75/0xec0 [ 31.468978] kasan_report+0xbe/0xf0 [ 31.469454] ? vma_interval_tree_remove+0xc75/0xec0 [ 31.470073] vma_interval_tree_remove+0xc75/0xec0 [ 31.470698] vma_prepare+0xc54/0x11a0 [ 31.471183] __split_vma+0x5af/0x950 [ 31.471657] ? __pfx___split_vma+0x10/0x10 [ 31.472190] ? find_held_lock+0x2c/0x110 [ 31.472745] do_vmi_align_munmap+0x2ba/0x11f0 [ 31.473320] ? lock_is_held_type+0x9f/0x120 [ 31.473857] ? __pfx_do_vmi_align_munmap+0x10/0x10 [ 31.474485] ? mtree_range_walk+0x632/0x900 [ 31.475035] ? mas_walk+0x5c7/0x7c0 [ 31.475518] do_vmi_munmap+0x1f1/0x2b0 [ 31.476016] mmap_region+0x1f9/0x2660 [ 31.476500] ? vm_mmap_pgoff+0x15c/0x3a0 [ 31.477018] ? __pfx_arch_get_unmapped_area_topdown+0x10/0x10 [ 31.477723] ? __pfx_lock_acquire+0x10/0x10 [ 31.478299] ? __pfx_mmap_region+0x10/0x10 [ 31.478834] ? security_mmap_addr+0x7d/0xa0 [ 31.479372] ? get_unmapped_area+0x1f5/0x3f0 [ 31.479933] do_mmap+0x854/0xf00 [ 31.480377] vm_mmap_pgoff+0x1a6/0x3a0 [ 31.480867] ? __pfx_vm_mmap_pgoff+0x10/0x10 [ 31.481432] ksys_mmap_pgoff+0x3af/0x500 [ 31.481935] do_syscall_64+0x3f/0x90 [ 31.482424] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 31.483073] RIP: 0033:0x7f60fc162d82 [ 31.483530] 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 [ 31.485658] RSP: 002b:00007ffe26624918 EFLAGS: 00000206 ORIG_RAX: 0000000000000009 [ 31.486572] RAX: ffffffffffffffda RBX: 0000000000000812 RCX: 00007f60fc162d82 [ 31.487411] RDX: 0000000000000005 RSI: 0000000000001000 RDI: 00007f60fb59c000 [ 31.488297] RBP: 00007f60fb59c000 R08: 0000000000000009 R09: 0000000000001000 [ 31.489156] R10: 0000000000000812 R11: 0000000000000206 R12: 0000559338f4bec0 [ 31.490001] R13: 00007ffe26624930 R14: 00007ffe26624960 R15: 00007ffe26624cc0 [ 31.490879] [ 31.491171] [ 31.491387] Allocated by task 212: [ 31.491813] kasan_save_stack+0x22/0x50 [ 31.492315] kasan_set_track+0x25/0x30 [ 31.492804] __kasan_slab_alloc+0x59/0x70 [ 31.493326] kmem_cache_alloc+0x16b/0x370 [ 31.493838] vm_area_dup+0x20/0x160 [ 31.494300] __split_vma+0x170/0x950 [ 31.494773] split_vma+0xc6/0x110 [ 31.495213] mprotect_fixup+0x8d2/0xb30 [ 31.495713] do_mprotect_pkey+0x87e/0xd40 [ 31.496230] __x64_sys_mprotect+0x78/0xc0 [ 31.496754] do_syscall_64+0x3f/0x90 [ 31.497233] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 31.497872] [ 31.498087] Freed by task 19: [ 31.498485] kasan_save_stack+0x22/0x50 [ 31.499006] kasan_set_track+0x25/0x30 [ 31.499496] kasan_save_free_info+0x2b/0x50 [ 31.500033] __kasan_slab_free+0x10a/0x190 [ 31.500568] kmem_cache_free+0x10d/0x4d0 [ 31.501077] rcu_core+0x8c8/0x2860 [ 31.501523] __do_softirq+0x1b7/0x7d4 [ 31.502005] [ 31.502219] Last potentially related work creation: [ 31.502808] kasan_save_stack+0x22/0x50 [ 31.503314] __kasan_record_aux_stack+0x8e/0xa0 [ 31.503888] __call_rcu_common.constprop.0+0x6a/0xb90 [ 31.504537] remove_vma+0x139/0x170 [ 31.504991] do_vmi_align_munmap+0xd4a/0x11f0 [ 31.505545] do_vmi_munmap+0x1f1/0x2b0 [ 31.506029] __vm_munmap+0x138/0x3a0 [ 31.506508] __x64_sys_munmap+0x59/0x80 [ 31.507004] do_syscall_64+0x3f/0x90 [ 31.507472] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 31.508109] [ 31.508323] The buggy address belongs to the object at ffff88800de93488 [ 31.508323] which belongs to the cache vm_area_struct of size 168 [ 31.509788] The buggy address is located 88 bytes inside of [ 31.509788] freed 168-byte region [ffff88800de93488, ffff88800de93530) [ 31.511218] [ 31.511433] The buggy address belongs to the physical page: [ 31.512087] page:0000000045440239 refcount:1 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0xde93 [ 31.513165] memcg:ffff88800fe2ac01 [ 31.513589] flags: 0x100000000000200(slab|node=0|zone=1) [ 31.514231] page_type: 0xffffffff() [ 31.514687] raw: 0100000000000200 ffff88800879fc80 dead000000000122 0000000000000000 [ 31.515606] raw: 0000000000000000 0000000000110011 00000001ffffffff ffff88800fe2ac01 [ 31.516507] page dumped because: kasan: bad access detected [ 31.517167] [ 31.517384] Memory state around the buggy address: [ 31.517962] ffff88800de93380: fc fc fc fc 00 00 00 00 00 00 00 00 00 00 00 00 [ 31.518852] ffff88800de93400: 00 00 00 00 00 00 00 00 00 fc fc fc fc fc fc fc [ 31.519730] >ffff88800de93480: fc fa fb fb fb fb fb fb fb fb fb fb fb fb fb fb [ 31.520586] ^ [ 31.521342] ffff88800de93500: fb fb fb fb fb fb fc fc fc fc fc fc fc fc fa fb [ 31.522197] ffff88800de93580: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb [ 31.523075] ================================================================== [ 31.524054] Disabling lock debugging due to kernel taint [ 33.423108] BUG: Bad rss-counter state mm:000000006f99eeb5 type:MM_FILEPAGES val:33 [ 33.424275] BUG: Bad rss-counter state mm:000000006f99eeb5 type:MM_ANONPAGES val:22 [ 33.777898] BUG: Bad rss-counter state mm:000000000f96873f type:MM_FILEPAGES val:33 [ 33.779138] BUG: Bad rss-counter state mm:000000000f96873f type:MM_ANONPAGES val:22 Warning: Permanently added '[localhost]:40144' (ECDSA) to the list of known hosts. 2023/06/20 03:50:59 fuzzer started 2023/06/20 03:50:59 dialing manager at localhost:44161 2023/06/20 03:50:59 checking machine... 2023/06/20 03:50:59 checking revisions... [ 34.475631] kmemleak: Automatic memory scanning thread ended 2023/06/20 03:50:59 testing simple program... [ 34.536614] cgroup: Unknown subsys name 'net' [ 34.584324] cgroup: Unknown subsys name 'rlimit' executing program executing program executing program VM DIAGNOSIS: 03:50:58 Registers: info registers vcpu 0 RAX=0000000080010001 RBX=00000000005b99b3 RCX=ffffffff813c81a0 RDX=ffff8880147e51c0 RSI=0000000000000000 RDI=0000000000000005 RBP=ffff88806ce09db8 RSP=ffff88806ce09cf0 R8 =0000000000000005 R9 =0000000000000000 R10=0000000000000000 R11=ffff88806ce09ff8 R12=0000000000000000 R13=00000000002aa4fc R14=0000000000232364 R15=0000000000000000 RIP=ffffffff814c07eb 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 00007fbb41910900 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=00007fbb418df008 CR3=0000000016ad2000 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=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 info registers vcpu 1 RAX=ffff88806cf35000 RBX=0000000000000001 RCX=ffffffff8450c50e RDX=ffffed100d9e6a01 RSI=0000000000000004 RDI=ffffffff812889a5 RBP=dffffc0000000000 RSP=ffff888008e27e70 R8 =0000000000000000 R9 =ffffed100d9e6a00 R10=ffff88806cf35003 R11=0000000000000001 R12=ffffffff85d3bed0 R13=1ffff110011c4fd3 R14=0000000000000000 R15=0000000000000000 RIP=ffffffff8450d49f 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=00007f12c37ccd20 CR3=000000000e80e000 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=2038353a30353a3330203032206e754a XMM01=73732878696e755f6d6170203a5d3832 XMM02=65736f6c63206e6f6973736573203a29 XMM03=755f6d6170203a5d3832325b64687373 XMM04=69662068637573206f4e203a656c6163 XMM05=3a656c696620766e65206e65706f206f XMM06=65733a6468737328766e655f6d617020 XMM07=6b7a79732038353a30353a3330203032 XMM08=3d656e696c646d632022656369767265 XMM09=00000000000000000000000000000000 XMM10=00000000000000000000000000000000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000