syzkaller login: [ 29.797881] BUG: Bad rss-counter state mm:0000000043fe3bf9 type:MM_FILEPAGES val:33 [ 29.799172] BUG: Bad rss-counter state mm:0000000043fe3bf9 type:MM_ANONPAGES val:22 [ 29.834080] ================================================================== [ 29.835138] BUG: KASAN: slab-use-after-free in vma_interval_tree_remove+0xc75/0xec0 [ 29.836281] Read of size 8 at addr ffff888018315df0 by task sshd/220 [ 29.837063] [ 29.837300] CPU: 1 PID: 220 Comm: sshd Not tainted 6.4.0-rc7-next-20230620 #1 [ 29.838363] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS 1.12.0-1 04/01/2014 [ 29.839357] Call Trace: [ 29.839682] [ 29.839976] dump_stack_lvl+0x91/0xf0 [ 29.840471] print_report+0xcc/0x620 [ 29.840966] ? __virt_addr_valid+0x102/0x340 [ 29.841528] ? vma_interval_tree_remove+0xc75/0xec0 [ 29.842178] ? vma_interval_tree_remove+0xc75/0xec0 [ 29.842806] kasan_report+0xbe/0xf0 [ 29.843299] ? vma_interval_tree_remove+0xc75/0xec0 [ 29.843943] vma_interval_tree_remove+0xc75/0xec0 [ 29.844569] vma_prepare+0xc54/0x11a0 [ 29.845061] __split_vma+0x5af/0x950 [ 29.845544] ? __pfx___split_vma+0x10/0x10 [ 29.846073] ? find_held_lock+0x2c/0x110 [ 29.846621] do_vmi_align_munmap+0x2ba/0x11f0 [ 29.847189] ? lock_is_held_type+0x9f/0x120 [ 29.847745] ? __pfx_do_vmi_align_munmap+0x10/0x10 [ 29.848357] ? mtree_range_walk+0x632/0x900 [ 29.848923] ? mas_walk+0x5c7/0x7c0 [ 29.849401] do_vmi_munmap+0x1f1/0x2b0 [ 29.849906] mmap_region+0x1f9/0x2660 [ 29.850411] ? vm_mmap_pgoff+0x15c/0x3a0 [ 29.850927] ? __pfx_arch_get_unmapped_area_topdown+0x10/0x10 [ 29.851664] ? __pfx_lock_acquire+0x10/0x10 [ 29.852201] ? __pfx_mmap_region+0x10/0x10 [ 29.852732] ? security_mmap_addr+0x7d/0xa0 [ 29.853272] ? get_unmapped_area+0x1f5/0x3f0 [ 29.853826] do_mmap+0x854/0xf00 [ 29.854282] vm_mmap_pgoff+0x1a6/0x3a0 [ 29.854796] ? __pfx_vm_mmap_pgoff+0x10/0x10 [ 29.855357] ksys_mmap_pgoff+0x3af/0x500 [ 29.855870] do_syscall_64+0x3f/0x90 [ 29.856350] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 29.857020] RIP: 0033:0x7f5e61fd9d82 [ 29.857477] 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 [ 29.859638] RSP: 002b:00007fffaa416668 EFLAGS: 00000206 ORIG_RAX: 0000000000000009 [ 29.860559] RAX: ffffffffffffffda RBX: 0000000000000812 RCX: 00007f5e61fd9d82 [ 29.861432] RDX: 0000000000000005 RSI: 0000000000001000 RDI: 00007f5e61413000 [ 29.862511] RBP: 00007f5e61413000 R08: 0000000000000009 R09: 0000000000001000 [ 29.863421] R10: 0000000000000812 R11: 0000000000000206 R12: 0000556703ec7ec0 [ 29.864290] R13: 00007fffaa416680 R14: 00007fffaa4166b0 R15: 00007fffaa416a10 [ 29.865185] [ 29.865485] [ 29.865699] Allocated by task 213: [ 29.866154] kasan_save_stack+0x22/0x50 [ 29.866681] kasan_set_track+0x25/0x30 [ 29.867190] __kasan_slab_alloc+0x59/0x70 [ 29.867733] kmem_cache_alloc+0x16b/0x370 [ 29.868255] vm_area_dup+0x20/0x160 [ 29.868745] __split_vma+0x170/0x950 [ 29.869222] split_vma+0xc6/0x110 [ 29.869675] mprotect_fixup+0x8d2/0xb30 [ 29.870195] do_mprotect_pkey+0x87e/0xd40 [ 29.870743] __x64_sys_mprotect+0x78/0xc0 [ 29.871280] do_syscall_64+0x3f/0x90 [ 29.871777] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 29.872443] [ 29.872663] Freed by task 213: [ 29.873067] kasan_save_stack+0x22/0x50 [ 29.873582] kasan_set_track+0x25/0x30 [ 29.874091] kasan_save_free_info+0x2b/0x50 [ 29.874664] __kasan_slab_free+0x10a/0x190 [ 29.875213] kmem_cache_free+0x10d/0x4d0 [ 29.875729] rcu_core+0x8c8/0x2860 [ 29.876192] __do_softirq+0x1b7/0x7d4 [ 29.876695] [ 29.876911] Last potentially related work creation: [ 29.877505] kasan_save_stack+0x22/0x50 [ 29.878014] __kasan_record_aux_stack+0x8e/0xa0 [ 29.878597] __call_rcu_common.constprop.0+0x6a/0xb90 [ 29.879242] remove_vma+0x139/0x170 [ 29.879712] do_vmi_align_munmap+0xd4a/0x11f0 [ 29.880300] do_vmi_munmap+0x1f1/0x2b0 [ 29.880800] __vm_munmap+0x138/0x3a0 [ 29.881276] __x64_sys_munmap+0x59/0x80 [ 29.881786] do_syscall_64+0x3f/0x90 [ 29.882288] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 29.882965] [ 29.883189] The buggy address belongs to the object at ffff888018315d98 [ 29.883189] which belongs to the cache vm_area_struct of size 168 [ 29.884692] The buggy address is located 88 bytes inside of [ 29.884692] freed 168-byte region [ffff888018315d98, ffff888018315e40) [ 29.886175] [ 29.886393] The buggy address belongs to the physical page: [ 29.887066] page:00000000510c5b6f refcount:1 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0x18315 [ 29.888177] memcg:ffff88800edb0601 [ 29.888614] flags: 0x100000000000200(slab|node=0|zone=1) [ 29.889261] page_type: 0xffffffff() [ 29.889720] raw: 0100000000000200 ffff8880087a0c80 dead000000000122 0000000000000000 [ 29.890675] raw: 0000000000000000 0000000000110011 00000001ffffffff ffff88800edb0601 [ 29.891585] page dumped because: kasan: bad access detected [ 29.892252] [ 29.892469] Memory state around the buggy address: [ 29.893059] ffff888018315c80: fc fc fc fc fc fc 00 00 00 00 00 00 00 00 00 00 [ 29.893923] ffff888018315d00: 00 00 00 00 00 00 00 00 00 00 00 fc fc fc fc fc [ 29.894806] >ffff888018315d80: fc fc fc fa fb fb fb fb fb fb fb fb fb fb fb fb [ 29.895677] ^ [ 29.896499] ffff888018315e00: fb fb fb fb fb fb fb fb fc fc fc fc fc fc fc fc [ 29.897365] ffff888018315e80: fa fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb [ 29.898234] ================================================================== [ 29.899347] Disabling lock debugging due to kernel taint [ 32.550026] BUG: Bad rss-counter state mm:0000000006fecd2b type:MM_FILEPAGES val:33 [ 32.551074] BUG: Bad rss-counter state mm:0000000006fecd2b type:MM_ANONPAGES val:22 [ 33.028105] BUG: Bad rss-counter state mm:00000000cdbba9e1 type:MM_FILEPAGES val:33 [ 33.029154] BUG: Bad rss-counter state mm:00000000cdbba9e1 type:MM_ANONPAGES val:22 Warning: Permanently added '[localhost]:4185' (ECDSA) to the list of known hosts. 2023/06/20 15:27:53 fuzzer started 2023/06/20 15:27:53 dialing manager at localhost:36067 2023/06/20 15:27:53 checking machine... 2023/06/20 15:27:53 checking revisions... [ 33.790613] kmemleak: Automatic memory scanning thread ended 2023/06/20 15:27:53 testing simple program... [ 33.848820] cgroup: Unknown subsys name 'net' [ 33.886083] cgroup: Unknown subsys name 'rlimit' executing program executing program executing program VM DIAGNOSIS: 15:27:53 Registers: info registers vcpu 0 RAX=0000000000000000 RBX=0000000000000002 RCX=0000000000000000 RDX=ffff888014600000 RSI=1ffff110031b63b8 RDI=0000000000000000 RBP=ffff888018db2068 RSP=ffff88801802f740 R8 =0000000000000005 R9 =000000000000000f R10=0000000000000002 R11=00000000000b6a61 R12=ffff8880172f7d00 R13=ffff8880172f7d30 R14=dffffc0000000000 R15=ffff888018db1dc0 RIP=ffffffff81b2b1fb RFL=00000216 [----AP-] 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 00007faab0f1b700 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=00007fff983be608 CR3=0000000018008000 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=2032353a37323a3531203032206e754a XMM01=73732878696e755f6d6170203a5d3932 XMM02=65736f6c63206e6f6973736573203a29 XMM03=755f6d6170203a5d3932325b64687373 XMM04=69662068637573206f4e203a656c6163 XMM05=3a656c696620766e65206e65706f206f XMM06=65733a6468737328766e655f6d617020 XMM07=6b7a79732032353a37323a3531203032 XMM08=3d656e696c646d632022656369767265 XMM09=00000000000000000000000000000000 XMM10=00000000000000000000000000000000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000 info registers vcpu 1 RAX=dffffc0000000000 RBX=ffff88806cf09ba8 RCX=ffffffff860d8256 RDX=1ffff1100d9e134f RSI=0000000000000000 RDI=ffff88806cf09a78 RBP=ffff88806cf09ac8 RSP=ffff88806cf09a00 R8 =ffffffff860d825a R9 =ffff88806cf09ab0 R10=0000000000038001 R11=0000000000010b8d R12=ffff88806cf09ad0 R13=ffff88806cf09ab8 R14=ffff88806cf09ba8 R15=ffff88806cf09a70 RIP=ffffffff81131c83 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 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=00007f9847d88000 CR3=000000000d8de000 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=00000000000000000000000000000000 XMM01=b1a4c845d9a24daad4415cdb79de2208 XMM02=ec2efd57dc4c00df000000000011be80 XMM03=886457f8c8ca5f2e000000000011bf50 XMM04=26c3c948184f635600000000000ae988 XMM05=19e9129bd510f2350000000000132a78 XMM06=301ecbef8338d9af00000000001318e0 XMM07=e042d86d42eb936e0000000000122f18 XMM08=886457f8c8ca5f2e000000000011bf50 XMM09=00000000000000000000000000000000 XMM10=00000000000000000000000000000000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000