syzkaller login: [ 30.676834] BUG: Bad rss-counter state mm:0000000077b30523 type:MM_FILEPAGES val:33 [ 30.678040] BUG: Bad rss-counter state mm:0000000077b30523 type:MM_ANONPAGES val:22 [ 30.842837] ================================================================== [ 30.843771] BUG: KASAN: slab-use-after-free in vma_interval_tree_remove+0xc75/0xec0 [ 30.844717] Read of size 8 at addr ffff888019ee6140 by task sshd/220 [ 30.845499] [ 30.845721] CPU: 0 PID: 220 Comm: sshd Not tainted 6.4.0-rc7-next-20230620 #1 [ 30.846709] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS 1.12.0-1 04/01/2014 [ 30.847737] Call Trace: [ 30.848078] [ 30.848368] dump_stack_lvl+0x91/0xf0 [ 30.848869] print_report+0xcc/0x620 [ 30.849371] ? __virt_addr_valid+0x102/0x340 [ 30.849939] ? vma_interval_tree_remove+0xc75/0xec0 [ 30.850575] ? vma_interval_tree_remove+0xc75/0xec0 [ 30.851211] kasan_report+0xbe/0xf0 [ 30.851717] ? vma_interval_tree_remove+0xc75/0xec0 [ 30.852350] vma_interval_tree_remove+0xc75/0xec0 [ 30.852957] vma_prepare+0xc54/0x11a0 [ 30.853448] __split_vma+0x5af/0x950 [ 30.853925] ? __pfx___split_vma+0x10/0x10 [ 30.854457] ? find_held_lock+0x2c/0x110 [ 30.854979] do_vmi_align_munmap+0x2ba/0x11f0 [ 30.855561] ? lock_is_held_type+0x9f/0x120 [ 30.856112] ? __pfx_do_vmi_align_munmap+0x10/0x10 [ 30.856729] ? mtree_range_walk+0x632/0x900 [ 30.857291] ? mas_walk+0x5c7/0x7c0 [ 30.857778] do_vmi_munmap+0x1f1/0x2b0 [ 30.858284] mmap_region+0x1f9/0x2660 [ 30.858774] ? vm_mmap_pgoff+0x15c/0x3a0 [ 30.859289] ? __pfx_arch_get_unmapped_area_topdown+0x10/0x10 [ 30.860032] ? __pfx_lock_acquire+0x10/0x10 [ 30.860567] ? __pfx_mmap_region+0x10/0x10 [ 30.861104] ? security_mmap_addr+0x7d/0xa0 [ 30.861637] ? get_unmapped_area+0x1f5/0x3f0 [ 30.862198] do_mmap+0x854/0xf00 [ 30.862641] vm_mmap_pgoff+0x1a6/0x3a0 [ 30.863140] ? __pfx_vm_mmap_pgoff+0x10/0x10 [ 30.863717] ksys_mmap_pgoff+0x3af/0x500 [ 30.864232] do_syscall_64+0x3f/0x90 [ 30.864713] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 30.865371] RIP: 0033:0x7fd68df91d82 [ 30.865831] 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 [ 30.868000] RSP: 002b:00007ffd4c0daf38 EFLAGS: 00000206 ORIG_RAX: 0000000000000009 [ 30.868920] RAX: ffffffffffffffda RBX: 0000000000000812 RCX: 00007fd68df91d82 [ 30.869773] RDX: 0000000000000005 RSI: 0000000000001000 RDI: 00007fd68d3cb000 [ 30.870630] RBP: 00007fd68d3cb000 R08: 0000000000000009 R09: 0000000000001000 [ 30.871506] R10: 0000000000000812 R11: 0000000000000206 R12: 00005646e1c81d90 [ 30.872361] R13: 00007ffd4c0daf50 R14: 00007ffd4c0daf80 R15: 00007ffd4c0db2e0 [ 30.873219] [ 30.873521] [ 30.873750] Allocated by task 213: [ 30.874189] kasan_save_stack+0x22/0x50 [ 30.874702] kasan_set_track+0x25/0x30 [ 30.875212] __kasan_slab_alloc+0x59/0x70 [ 30.875753] kmem_cache_alloc+0x16b/0x370 [ 30.876283] vm_area_dup+0x20/0x160 [ 30.876742] __split_vma+0x170/0x950 [ 30.877219] split_vma+0xc6/0x110 [ 30.877658] mprotect_fixup+0x8d2/0xb30 [ 30.878167] do_mprotect_pkey+0x87e/0xd40 [ 30.878704] __x64_sys_mprotect+0x78/0xc0 [ 30.879229] do_syscall_64+0x3f/0x90 [ 30.879734] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 30.880379] [ 30.880604] Freed by task 213: [ 30.881000] kasan_save_stack+0x22/0x50 [ 30.881515] kasan_set_track+0x25/0x30 [ 30.882010] kasan_save_free_info+0x2b/0x50 [ 30.882553] __kasan_slab_free+0x10a/0x190 [ 30.883095] kmem_cache_free+0x10d/0x4d0 [ 30.883623] rcu_core+0x8c8/0x2860 [ 30.884078] __do_softirq+0x1b7/0x7d4 [ 30.884572] [ 30.884786] Last potentially related work creation: [ 30.885377] kasan_save_stack+0x22/0x50 [ 30.885880] __kasan_record_aux_stack+0x8e/0xa0 [ 30.886458] __call_rcu_common.constprop.0+0x6a/0xb90 [ 30.887115] remove_vma+0x139/0x170 [ 30.887604] do_vmi_align_munmap+0xd4a/0x11f0 [ 30.888178] do_vmi_munmap+0x1f1/0x2b0 [ 30.888675] __vm_munmap+0x138/0x3a0 [ 30.889152] __x64_sys_munmap+0x59/0x80 [ 30.889658] do_syscall_64+0x3f/0x90 [ 30.890135] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 30.890779] [ 30.890996] The buggy address belongs to the object at ffff888019ee60e8 [ 30.890996] which belongs to the cache vm_area_struct of size 168 [ 30.892505] The buggy address is located 88 bytes inside of [ 30.892505] freed 168-byte region [ffff888019ee60e8, ffff888019ee6190) [ 30.893940] [ 30.894160] The buggy address belongs to the physical page: [ 30.894824] page:0000000026f4f48c refcount:1 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0x19ee6 [ 30.895921] memcg:ffff888019ecc701 [ 30.896359] anon flags: 0x100000000000200(slab|node=0|zone=1) [ 30.897054] page_type: 0xffffffff() [ 30.897517] raw: 0100000000000200 ffff8880087a0c80 ffffea00003aae40 dead000000000005 [ 30.898433] raw: 0000000000000000 0000000000110011 00000001ffffffff ffff888019ecc701 [ 30.899364] page dumped because: kasan: bad access detected [ 30.900018] [ 30.900239] Memory state around the buggy address: [ 30.900823] ffff888019ee6000: fa fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb [ 30.901681] ffff888019ee6080: fb fb fb fb fb fc fc fc fc fc fc fc fc fa fb fb [ 30.902542] >ffff888019ee6100: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb [ 30.903403] ^ [ 30.904051] ffff888019ee6180: fb fb fc fc fc fc fc fc fc fc 00 00 00 00 00 00 [ 30.904915] ffff888019ee6200: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 fc [ 30.905769] ================================================================== [ 30.906742] Disabling lock debugging due to kernel taint [ 33.201304] BUG: Bad rss-counter state mm:0000000022f07544 type:MM_FILEPAGES val:33 [ 33.202471] BUG: Bad rss-counter state mm:0000000022f07544 type:MM_ANONPAGES val:22 [ 33.600273] BUG: Bad rss-counter state mm:00000000400d464c type:MM_FILEPAGES val:33 [ 33.601551] BUG: Bad rss-counter state mm:00000000400d464c type:MM_ANONPAGES val:22 Warning: Permanently added '[localhost]:53870' (ECDSA) to the list of known hosts. 2023/06/20 11:21:01 fuzzer started 2023/06/20 11:21:01 dialing manager at localhost:36067 2023/06/20 11:21:01 checking machine... 2023/06/20 11:21:01 checking revisions... [ 34.301150] kmemleak: Automatic memory scanning thread ended 2023/06/20 11:21:02 testing simple program... [ 34.345533] cgroup: Unknown subsys name 'net' [ 34.417394] cgroup: Unknown subsys name 'rlimit' executing program executing program executing program VM DIAGNOSIS: 11:21:01 Registers: info registers vcpu 0 RAX=dffffc0000000000 RBX=ffffffff813ad470 RCX=0000000000000001 RDX=ffff88800dc2f9d8 RSI=ffffffff8450cc7f RDI=ffff88800dc2f9d8 RBP=ffff88800dc2fa70 RSP=ffff88800dc2f9c0 R8 =0000000000000001 R9 =ffff88800dc2fa18 R10=0000000000038001 R11=0000000000022457 R12=ffff88800dc2faa0 R13=0000000000000000 R14=ffff88800daa0000 R15=ffff88800dc2f9d8 RIP=ffffffff811305e8 RFL=00000202 [-------] 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 00007ff7d5a70900 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=00007ff7d4e68ed0 CR3=000000000d880000 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=ffffffffffffffffffffffffffffffff XMM01=30306234386136303638616663356134 XMM02=38303062343861363036386166633561 XMM03=2f6c616e72756f6a2f676f6c2f6e7572 XMM04=5632ffa6e6491dc800000000000ae988 XMM05=d1940f92186c6afa00000000001323f8 XMM06=27df0be30d8ece7c0000000000131198 XMM07=00000000000000000000000000000000 XMM08=415453454d49545f454d49544c414552 XMM09=00000000000000000000000000000000 XMM10=20200000000020202020202020200000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000 info registers vcpu 1 RAX=0000000000000000 RBX=0000000000000002 RCX=ffffffff86139744 RDX=0000000000000000 RSI=0000000000000001 RDI=0000000000000001 RBP=ffff88806cf09af0 RSP=ffff88806cf09a28 R8 =ffffffff86139748 R9 =ffff88806cf09ad8 R10=0000000000038001 R11=0000000000020f03 R12=ffff88806cf09af8 R13=ffff88806cf09ae0 R14=0000000000000005 R15=ffff88806cf09a98 RIP=ffffffff81130b3f 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 00007f4a34a3c900 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=00007ffc4818d000 CR3=000000000e71c000 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=ffffffffffffffffffff000000000000 XMM01=000000000000003635006b6f6c6c756e XMM02=62003d73646e756f7200323135616873 XMM03=5320444f4854454d5f54505952434e45 XMM04=40404040404040404040404040404040 XMM05=5a5a5a5a5a5a5a5a5a5a5a5a5a5a5a5a XMM06=20202020202020202020202020202020 XMM07=00000000000000000000000000000000 XMM08=00000000000000000000000000202020 XMM09=ff0000ffffffffffff00000000ffffff XMM10=00000000000000000000000000000000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000