syzkaller login: [ 31.285621] BUG: Bad rss-counter state mm:00000000f7c48a68 type:MM_FILEPAGES val:33 [ 31.286496] BUG: Bad rss-counter state mm:00000000f7c48a68 type:MM_ANONPAGES val:22 [ 31.397599] ================================================================== [ 31.398412] BUG: KASAN: slab-use-after-free in vma_interval_tree_remove+0xc75/0xec0 [ 31.399249] Read of size 8 at addr ffff88801423fd08 by task sshd/219 [ 31.399801] [ 31.399944] CPU: 0 PID: 219 Comm: sshd Not tainted 6.4.0-rc7-next-20230620 #1 [ 31.400545] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS 1.12.0-1 04/01/2014 [ 31.401202] Call Trace: [ 31.401417] [ 31.401606] dump_stack_lvl+0x91/0xf0 [ 31.401933] print_report+0xcc/0x620 [ 31.402507] ? __virt_addr_valid+0x102/0x340 [ 31.402889] ? vma_interval_tree_remove+0xc75/0xec0 [ 31.403346] ? vma_interval_tree_remove+0xc75/0xec0 [ 31.403815] kasan_report+0xbe/0xf0 [ 31.404194] ? vma_interval_tree_remove+0xc75/0xec0 [ 31.404676] vma_interval_tree_remove+0xc75/0xec0 [ 31.405135] vma_prepare+0xc54/0x11a0 [ 31.405462] __split_vma+0x5af/0x950 [ 31.405778] ? __pfx___split_vma+0x10/0x10 [ 31.406125] ? find_held_lock+0x2c/0x110 [ 31.406442] do_vmi_align_munmap+0x2ba/0x11f0 [ 31.406780] ? lock_is_held_type+0x9f/0x120 [ 31.407109] ? __pfx_do_vmi_align_munmap+0x10/0x10 [ 31.407494] ? mtree_range_walk+0x632/0x900 [ 31.407837] ? mas_walk+0x5c7/0x7c0 [ 31.408143] do_vmi_munmap+0x1f1/0x2b0 [ 31.408452] mmap_region+0x1f9/0x2660 [ 31.408745] ? vm_mmap_pgoff+0x15c/0x3a0 [ 31.409077] ? __pfx_arch_get_unmapped_area_topdown+0x10/0x10 [ 31.409545] ? __pfx_lock_acquire+0x10/0x10 [ 31.409899] ? __pfx_mmap_region+0x10/0x10 [ 31.410220] ? security_mmap_addr+0x7d/0xa0 [ 31.410543] ? get_unmapped_area+0x1f5/0x3f0 [ 31.410898] do_mmap+0x854/0xf00 [ 31.411180] vm_mmap_pgoff+0x1a6/0x3a0 [ 31.411487] ? __pfx_vm_mmap_pgoff+0x10/0x10 [ 31.411847] ksys_mmap_pgoff+0x3af/0x500 [ 31.412155] do_syscall_64+0x3f/0x90 [ 31.412444] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 31.412879] RIP: 0033:0x7f6f120c2d82 [ 31.413221] 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 [ 31.414633] RSP: 002b:00007ffc3771bde8 EFLAGS: 00000206 ORIG_RAX: 0000000000000009 [ 31.415206] RAX: ffffffffffffffda RBX: 0000000000000812 RCX: 00007f6f120c2d82 [ 31.415750] RDX: 0000000000000005 RSI: 0000000000001000 RDI: 00007f6f114fc000 [ 31.416286] RBP: 00007f6f114fc000 R08: 0000000000000009 R09: 0000000000001000 [ 31.416821] R10: 0000000000000812 R11: 0000000000000206 R12: 00005583c03b3ec0 [ 31.417388] R13: 00007ffc3771be00 R14: 00007ffc3771be30 R15: 00007ffc3771c190 [ 31.417911] [ 31.418094] [ 31.418229] Allocated by task 212: [ 31.418497] kasan_save_stack+0x22/0x50 [ 31.418840] kasan_set_track+0x25/0x30 [ 31.419160] __kasan_slab_alloc+0x59/0x70 [ 31.419482] kmem_cache_alloc+0x16b/0x370 [ 31.419800] vm_area_dup+0x20/0x160 [ 31.420074] __split_vma+0x170/0x950 [ 31.420356] split_vma+0xc6/0x110 [ 31.420621] mprotect_fixup+0x8d2/0xb30 [ 31.420924] do_mprotect_pkey+0x87e/0xd40 [ 31.421276] __x64_sys_mprotect+0x78/0xc0 [ 31.421586] do_syscall_64+0x3f/0x90 [ 31.421874] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 31.422273] [ 31.422420] Freed by task 13: [ 31.422662] kasan_save_stack+0x22/0x50 [ 31.422983] kasan_set_track+0x25/0x30 [ 31.423300] kasan_save_free_info+0x2b/0x50 [ 31.423646] __kasan_slab_free+0x10a/0x190 [ 31.423992] kmem_cache_free+0x10d/0x4d0 [ 31.424305] rcu_core+0x8c8/0x2860 [ 31.424574] __do_softirq+0x1b7/0x7d4 [ 31.424866] [ 31.424994] Last potentially related work creation: [ 31.425374] kasan_save_stack+0x22/0x50 [ 31.425687] __kasan_record_aux_stack+0x8e/0xa0 [ 31.426042] __call_rcu_common.constprop.0+0x6a/0xb90 [ 31.426443] remove_vma+0x139/0x170 [ 31.426718] do_vmi_align_munmap+0xd4a/0x11f0 [ 31.427055] do_vmi_munmap+0x1f1/0x2b0 [ 31.427338] __vm_munmap+0x138/0x3a0 [ 31.427613] __x64_sys_munmap+0x59/0x80 [ 31.427915] do_syscall_64+0x3f/0x90 [ 31.428231] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 31.428653] [ 31.428814] The buggy address belongs to the object at ffff88801423fcb0 [ 31.428814] which belongs to the cache vm_area_struct of size 168 [ 31.429822] The buggy address is located 88 bytes inside of [ 31.429822] freed 168-byte region [ffff88801423fcb0, ffff88801423fd58) [ 31.430751] [ 31.430895] The buggy address belongs to the physical page: [ 31.431358] page:00000000de669dac refcount:1 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0x1423f [ 31.432200] memcg:ffff888015b27401 [ 31.432537] flags: 0x100000000000200(slab|node=0|zone=1) [ 31.432928] page_type: 0xffffffff() [ 31.433250] raw: 0100000000000200 ffff8880087a0c80 dead000000000122 0000000000000000 [ 31.433832] raw: 0000000000000000 0000000000110011 00000001ffffffff ffff888015b27401 [ 31.434426] page dumped because: kasan: bad access detected [ 31.434912] [ 31.435047] Memory state around the buggy address: [ 31.435410] ffff88801423fc00: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 fc fc [ 31.435990] ffff88801423fc80: fc fc fc fc fc fc fa fb fb fb fb fb fb fb fb fb [ 31.436613] >ffff88801423fd00: fb fb fb fb fb fb fb fb fb fb fb fc fc fc fc fc [ 31.437233] ^ [ 31.437529] ffff88801423fd80: fc fc fc fa fb fb fb fb fb fb fb fb fb fb fb fb [ 31.438054] ffff88801423fe00: fb fb fb fb fb fb fb fb fc fc fc fc fc fc fc fc [ 31.438696] ================================================================== [ 31.439588] Disabling lock debugging due to kernel taint [ 32.861305] BUG: Bad rss-counter state mm:00000000c09eb4fc type:MM_FILEPAGES val:33 [ 32.861952] BUG: Bad rss-counter state mm:00000000c09eb4fc type:MM_ANONPAGES val:22 [ 33.217500] BUG: Bad rss-counter state mm:00000000a0961ad8 type:MM_FILEPAGES val:33 [ 33.218174] BUG: Bad rss-counter state mm:00000000a0961ad8 type:MM_ANONPAGES val:22 Warning: Permanently added '[localhost]:3329' (ECDSA) to the list of known hosts. 2023/06/21 09:21:44 fuzzer started 2023/06/21 09:21:44 dialing manager at localhost:36067 2023/06/21 09:21:44 checking machine... 2023/06/21 09:21:44 checking revisions... [ 33.760017] kmemleak: Automatic memory scanning thread ended 2023/06/21 09:21:44 testing simple program... [ 33.801435] cgroup: Unknown subsys name 'net' [ 33.840974] cgroup: Unknown subsys name 'rlimit' executing program executing program executing program VM DIAGNOSIS: 09:21:44 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=00007fff894d7948 CR3=000000000f0e0000 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=2033343a31323a3930203132206e754a XMM01=6964206465766965636552203a5d3832 XMM02=6f63736964203a31313a383431353320 XMM03=7266207463656e6e6f63736964206465 XMM04=69662068637573206f4e203a656c6163 XMM05=3a656c696620766e65206e65706f206f XMM06=65733a6468737328766e655f6d617020 XMM07=6b7a79732033343a31323a3930203132 XMM08=3d656e696c646d632022656369767265 XMM09=00000000000000000000000000000000 XMM10=00000000000000000000000000000000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000 info registers vcpu 1 RAX=dffffc0000000000 RBX=ffffffff85652d08 RCX=0000000000000100 RDX=1ffffffff0aca5a1 RSI=ffffffff814c84af RDI=0000000000000005 RBP=0000000000000000 RSP=ffff88806cf099f8 R8 =0000000000000005 R9 =0000000000000000 R10=0000000000000000 R11=00000000000b6a61 R12=0000000000000000 R13=0000000000000000 R14=ffffffff85652d08 R15=ffff88801a29c2e0 RIP=ffffffff814c0860 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 00007f7ed3f73900 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=0000563f005e2818 CR3=000000000aa70000 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=756f6a2f646d65747379732f6e75722f XMM01=00676f6c7379732f6c616e72756f6a2f XMM02=756f6a2f646d65747379732f6e75722f XMM03=006c616e72756f6a2f646d6574737973 XMM04=26dd5ac6f7c90c3800000000000ae988 XMM05=c89a15c6634181bb0000000000132810 XMM06=806171799158d96700000000001318b0 XMM07=fb795ef6d65770560000000000121b68 XMM08=4f5453444600273d67736d000d0a0920 XMM09=00000000000000000000000000000000 XMM10=20200000000020202020202020200000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000