syzkaller login: [ 36.723480] BUG: Bad rss-counter state mm:000000004e6e86b4 type:MM_FILEPAGES val:33 [ 36.724490] BUG: Bad rss-counter state mm:000000004e6e86b4 type:MM_ANONPAGES val:22 [ 36.878984] ================================================================== [ 36.879894] BUG: KASAN: slab-use-after-free in vma_interval_tree_remove+0xc75/0xec0 [ 36.880833] Read of size 8 at addr ffff8880183adc20 by task sshd/220 [ 36.881704] [ 36.881924] CPU: 0 PID: 220 Comm: sshd Not tainted 6.4.0-rc7-next-20230619 #1 [ 36.882820] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS 1.12.0-1 04/01/2014 [ 36.883823] Call Trace: [ 36.884145] [ 36.884431] dump_stack_lvl+0x91/0xf0 [ 36.884933] print_report+0xcc/0x620 [ 36.885418] ? __virt_addr_valid+0x102/0x340 [ 36.885981] ? vma_interval_tree_remove+0xc75/0xec0 [ 36.886636] ? vma_interval_tree_remove+0xc75/0xec0 [ 36.887258] kasan_report+0xbe/0xf0 [ 36.887739] ? vma_interval_tree_remove+0xc75/0xec0 [ 36.888375] vma_interval_tree_remove+0xc75/0xec0 [ 36.888999] vma_prepare+0xc54/0x11a0 [ 36.889502] __split_vma+0x5af/0x950 [ 36.889995] ? __pfx___split_vma+0x10/0x10 [ 36.890580] ? find_held_lock+0x2c/0x110 [ 36.891125] do_vmi_align_munmap+0x2ba/0x11f0 [ 36.891711] ? lock_is_held_type+0x9f/0x120 [ 36.892277] ? __pfx_do_vmi_align_munmap+0x10/0x10 [ 36.892905] ? mtree_range_walk+0x632/0x900 [ 36.893482] ? mas_walk+0x5c7/0x7c0 [ 36.893972] do_vmi_munmap+0x1f1/0x2b0 [ 36.894497] mmap_region+0x1f9/0x2660 [ 36.894999] ? vm_mmap_pgoff+0x15c/0x3a0 [ 36.895539] ? __pfx_arch_get_unmapped_area_topdown+0x10/0x10 [ 36.896290] ? __pfx_lock_acquire+0x10/0x10 [ 36.896850] ? __pfx_mmap_region+0x10/0x10 [ 36.897406] ? security_mmap_addr+0x7d/0xa0 [ 36.897960] ? get_unmapped_area+0x1f5/0x3f0 [ 36.898543] do_mmap+0x854/0xf00 [ 36.898999] vm_mmap_pgoff+0x1a6/0x3a0 [ 36.899520] ? __pfx_vm_mmap_pgoff+0x10/0x10 [ 36.900106] ksys_mmap_pgoff+0x3af/0x500 [ 36.900633] do_syscall_64+0x3f/0x90 [ 36.901126] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 36.901802] RIP: 0033:0x7f453b650d82 [ 36.902293] 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 [ 36.904511] RSP: 002b:00007fffa6d19e48 EFLAGS: 00000206 ORIG_RAX: 0000000000000009 [ 36.905451] RAX: ffffffffffffffda RBX: 0000000000000812 RCX: 00007f453b650d82 [ 36.906346] RDX: 0000000000000005 RSI: 0000000000001000 RDI: 00007f453aa8a000 [ 36.907222] RBP: 00007f453aa8a000 R08: 0000000000000009 R09: 0000000000001000 [ 36.908107] R10: 0000000000000812 R11: 0000000000000206 R12: 0000557299addec0 [ 36.908987] R13: 00007fffa6d19e60 R14: 00007fffa6d19e90 R15: 00007fffa6d1a1f0 [ 36.909879] [ 36.910183] [ 36.910430] Allocated by task 213: [ 36.910883] kasan_save_stack+0x22/0x50 [ 36.911406] kasan_set_track+0x25/0x30 [ 36.911922] __kasan_slab_alloc+0x59/0x70 [ 36.912465] kmem_cache_alloc+0x16b/0x370 [ 36.913005] vm_area_dup+0x20/0x160 [ 36.913480] __split_vma+0x170/0x950 [ 36.913966] split_vma+0xc6/0x110 [ 36.914432] mprotect_fixup+0x8d2/0xb30 [ 36.914953] do_mprotect_pkey+0x87e/0xd40 [ 36.915501] __x64_sys_mprotect+0x78/0xc0 [ 36.916044] do_syscall_64+0x3f/0x90 [ 36.916544] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 36.917211] [ 36.917433] Freed by task 213: [ 36.917837] kasan_save_stack+0x22/0x50 [ 36.918379] kasan_set_track+0x25/0x30 [ 36.918890] kasan_save_free_info+0x2b/0x50 [ 36.919443] __kasan_slab_free+0x10a/0x190 [ 36.920002] kmem_cache_free+0x10d/0x4d0 [ 36.920528] rcu_core+0x8c8/0x2860 [ 36.920990] __do_softirq+0x1b7/0x7d4 [ 36.921486] [ 36.921709] Last potentially related work creation: [ 36.922325] kasan_save_stack+0x22/0x50 [ 36.922847] __kasan_record_aux_stack+0x8e/0xa0 [ 36.923441] __call_rcu_common.constprop.0+0x6a/0xb90 [ 36.924111] remove_vma+0x139/0x170 [ 36.924581] do_vmi_align_munmap+0xd4a/0x11f0 [ 36.925159] do_vmi_munmap+0x1f1/0x2b0 [ 36.925671] __vm_munmap+0x138/0x3a0 [ 36.926156] __x64_sys_munmap+0x59/0x80 [ 36.926682] do_syscall_64+0x3f/0x90 [ 36.927176] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 36.927841] [ 36.928062] The buggy address belongs to the object at ffff8880183adbc8 [ 36.928062] which belongs to the cache vm_area_struct of size 168 [ 36.929614] The buggy address is located 88 bytes inside of [ 36.929614] freed 168-byte region [ffff8880183adbc8, ffff8880183adc70) [ 36.931103] [ 36.931328] The buggy address belongs to the physical page: [ 36.932014] page:00000000c9119469 refcount:1 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0x183ad [ 36.933161] memcg:ffff88800c543d01 [ 36.933605] flags: 0x100000000000200(slab|node=0|zone=1) [ 36.934307] page_type: 0xffffffff() [ 36.934776] raw: 0100000000000200 ffff88800879fc80 dead000000000122 0000000000000000 [ 36.935741] raw: 0000000000000000 0000000000110011 00000001ffffffff ffff88800c543d01 [ 36.936692] page dumped because: kasan: bad access detected [ 36.937379] [ 36.937601] Memory state around the buggy address: [ 36.938214] ffff8880183adb00: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 [ 36.939102] ffff8880183adb80: 00 fc fc fc fc fc fc fc fc fa fb fb fb fb fb fb [ 36.939994] >ffff8880183adc00: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fc fc [ 36.940871] ^ [ 36.941424] ffff8880183adc80: fc fc fc fc fc fc fa fb fb fb fb fb fb fb fb fb [ 36.942335] ffff8880183add00: fb fb fb fb fb fb fb fb fb fb fb fc fc fc fc fc [ 36.943216] ================================================================== [ 36.944210] Disabling lock debugging due to kernel taint [ 38.880767] BUG: Bad rss-counter state mm:00000000c8a928f2 type:MM_FILEPAGES val:33 [ 38.881749] BUG: Bad rss-counter state mm:00000000c8a928f2 type:MM_ANONPAGES val:22 [ 39.382392] BUG: Bad rss-counter state mm:0000000078f024ae type:MM_FILEPAGES val:33 [ 39.383548] BUG: Bad rss-counter state mm:0000000078f024ae type:MM_ANONPAGES val:22 Warning: Permanently added '[localhost]:45842' (ECDSA) to the list of known hosts. 2023/06/19 14:50:28 fuzzer started 2023/06/19 14:50:28 dialing manager at localhost:44161 2023/06/19 14:50:28 checking machine... 2023/06/19 14:50:28 checking revisions... [ 40.069843] kmemleak: Automatic memory scanning thread ended 2023/06/19 14:50:28 testing simple program... [ 40.114185] cgroup: Unknown subsys name 'net' [ 40.188424] cgroup: Unknown subsys name 'rlimit' executing program executing program executing program VM DIAGNOSIS: 14:50:22 Registers: info registers vcpu 0 RAX=0000000080000000 RBX=00000000fffffffd RCX=ffffffff81210e73 RDX=0000000000000001 RSI=0000000000000000 RDI=0000000000000001 RBP=ffffffff85bae420 RSP=ffff88801809fbf8 R8 =0000000000000001 R9 =0000000000000000 R10=0000000000000001 R11=00000000000b6996 R12=0000000000000000 R13=dffffc0000000000 R14=0000000000000000 R15=0000000000000001 RIP=ffffffff814c01d0 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 00007f69ea2af900 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=00007fff008d4000 CR3=000000001667c000 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=ffff88806cf35000 RBX=0000000000000001 RCX=ffffffff8450c50e RDX=ffffed100d9e6a01 RSI=0000000000000004 RDI=ffffffff812889a5 RBP=dffffc0000000000 RSP=ffff888008e27e70 R8 =0000000000000000 R9 =ffffed100d9e6a00 R10=ffff88806cf35003 R11=ffff888008c58400 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=00007efd5ccc0640 CR3=000000000f504000 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=2037323a30353a3431203931206e754a XMM01=73732878696e755f6d6170203a5d3033 XMM02=65736f6c63206e6f6973736573203a29 XMM03=755f6d6170203a5d3033325b64687373 XMM04=69662068637573206f4e203a656c6163 XMM05=3a656c696620766e65206e65706f206f XMM06=65733a6468737328766e655f6d617020 XMM07=6b7a79732037323a30353a3431203931 XMM08=3d656e696c646d632022656369767265 XMM09=00000000000000000000000000000000 XMM10=00000000000000000000000000000000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000