syzkaller login: [ 35.683251] BUG: Bad rss-counter state mm:000000006613dae0 type:MM_FILEPAGES val:33 [ 35.684730] BUG: Bad rss-counter state mm:000000006613dae0 type:MM_ANONPAGES val:22 [ 35.844034] ================================================================== [ 35.844980] BUG: KASAN: slab-use-after-free in vma_interval_tree_remove+0xc75/0xec0 [ 35.845906] Read of size 8 at addr ffff88800fdb4140 by task sshd/220 [ 35.846676] [ 35.847019] CPU: 0 PID: 220 Comm: sshd Not tainted 6.4.0-rc7-next-20230619 #1 [ 35.847867] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS 1.12.0-1 04/01/2014 [ 35.848853] Call Trace: [ 35.849188] <TASK> [ 35.849472] dump_stack_lvl+0x91/0xf0 [ 35.849962] print_report+0xcc/0x620 [ 35.850446] ? __virt_addr_valid+0x102/0x340 [ 35.850993] ? vma_interval_tree_remove+0xc75/0xec0 [ 35.851619] ? vma_interval_tree_remove+0xc75/0xec0 [ 35.852226] kasan_report+0xbe/0xf0 [ 35.852731] ? vma_interval_tree_remove+0xc75/0xec0 [ 35.853345] vma_interval_tree_remove+0xc75/0xec0 [ 35.853948] vma_prepare+0xc54/0x11a0 [ 35.854427] __split_vma+0x5af/0x950 [ 35.854895] ? __pfx___split_vma+0x10/0x10 [ 35.855420] ? find_held_lock+0x2c/0x110 [ 35.855941] do_vmi_align_munmap+0x2ba/0x11f0 [ 35.856502] ? lock_is_held_type+0x9f/0x120 [ 35.857052] ? __pfx_do_vmi_align_munmap+0x10/0x10 [ 35.857655] ? mtree_range_walk+0x632/0x900 [ 35.858197] ? mas_walk+0x5c7/0x7c0 [ 35.858670] do_vmi_munmap+0x1f1/0x2b0 [ 35.859168] mmap_region+0x1f9/0x2660 [ 35.859647] ? vm_mmap_pgoff+0x15c/0x3a0 [ 35.860154] ? __pfx_arch_get_unmapped_area_topdown+0x10/0x10 [ 35.860873] ? __pfx_lock_acquire+0x10/0x10 [ 35.861405] ? __pfx_mmap_region+0x10/0x10 [ 35.861930] ? security_mmap_addr+0x7d/0xa0 [ 35.862455] ? get_unmapped_area+0x1f5/0x3f0 [ 35.862996] do_mmap+0x854/0xf00 [ 35.863428] vm_mmap_pgoff+0x1a6/0x3a0 [ 35.863916] ? __pfx_vm_mmap_pgoff+0x10/0x10 [ 35.864471] ksys_mmap_pgoff+0x3af/0x500 [ 35.864986] do_syscall_64+0x3f/0x90 [ 35.865460] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 35.866107] RIP: 0033:0x7f809270cd82 [ 35.866557] 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 [ 35.868642] RSP: 002b:00007ffe22b46df8 EFLAGS: 00000206 ORIG_RAX: 0000000000000009 [ 35.869568] RAX: ffffffffffffffda RBX: 0000000000000812 RCX: 00007f809270cd82 [ 35.870419] RDX: 0000000000000005 RSI: 0000000000001000 RDI: 00007f8091b46000 [ 35.871248] RBP: 00007f8091b46000 R08: 0000000000000009 R09: 0000000000001000 [ 35.872084] R10: 0000000000000812 R11: 0000000000000206 R12: 000055fd201cbec0 [ 35.872951] R13: 00007ffe22b46e10 R14: 00007ffe22b46e40 R15: 00007ffe22b471a0 [ 35.873797] </TASK> [ 35.874087] [ 35.874300] Allocated by task 213: [ 35.874725] kasan_save_stack+0x22/0x50 [ 35.875237] kasan_set_track+0x25/0x30 [ 35.875737] __kasan_slab_alloc+0x59/0x70 [ 35.876260] kmem_cache_alloc+0x16b/0x370 [ 35.876786] vm_area_dup+0x20/0x160 [ 35.877243] __split_vma+0x170/0x950 [ 35.877709] split_vma+0xc6/0x110 [ 35.878146] mprotect_fixup+0x8d2/0xb30 [ 35.878642] do_mprotect_pkey+0x87e/0xd40 [ 35.879162] __x64_sys_mprotect+0x78/0xc0 [ 35.879673] do_syscall_64+0x3f/0x90 [ 35.880138] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 35.880775] [ 35.880992] Freed by task 213: [ 35.881378] kasan_save_stack+0x22/0x50 [ 35.881878] kasan_set_track+0x25/0x30 [ 35.882366] kasan_save_free_info+0x2b/0x50 [ 35.882894] __kasan_slab_free+0x10a/0x190 [ 35.883421] kmem_cache_free+0x10d/0x4d0 [ 35.883928] rcu_core+0x8c8/0x2860 [ 35.884366] __do_softirq+0x1b7/0x7d4 [ 35.884844] [ 35.885063] Last potentially related work creation: [ 35.885636] kasan_save_stack+0x22/0x50 [ 35.886133] __kasan_record_aux_stack+0x8e/0xa0 [ 35.886706] __call_rcu_common.constprop.0+0x6a/0xb90 [ 35.887341] remove_vma+0x139/0x170 [ 35.887786] do_vmi_align_munmap+0xd4a/0x11f0 [ 35.888331] do_vmi_munmap+0x1f1/0x2b0 [ 35.888831] __vm_munmap+0x138/0x3a0 [ 35.889300] __x64_sys_munmap+0x59/0x80 [ 35.889789] do_syscall_64+0x3f/0x90 [ 35.890256] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 35.890897] [ 35.891111] The buggy address belongs to the object at ffff88800fdb40e8 [ 35.891111] which belongs to the cache vm_area_struct of size 168 [ 35.892566] The buggy address is located 88 bytes inside of [ 35.892566] freed 168-byte region [ffff88800fdb40e8, ffff88800fdb4190) [ 35.893962] [ 35.894174] The buggy address belongs to the physical page: [ 35.894834] page:000000000501389f refcount:1 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0xfdb4 [ 35.895930] memcg:ffff888019f26401 [ 35.896353] flags: 0x100000000000200(slab|node=0|zone=1) [ 35.897015] page_type: 0xffffffff() [ 35.897467] raw: 0100000000000200 ffff88800879fc80 dead000000000122 0000000000000000 [ 35.898376] raw: 0000000000000000 0000000000110011 00000001ffffffff ffff888019f26401 [ 35.899281] page dumped because: kasan: bad access detected [ 35.899947] [ 35.900159] Memory state around the buggy address: [ 35.900735] ffff88800fdb4000: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 [ 35.901596] ffff88800fdb4080: 00 00 00 00 00 fc fc fc fc fc fc fc fc fa fb fb [ 35.902447] >ffff88800fdb4100: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb [ 35.903295] ^ [ 35.903934] ffff88800fdb4180: fb fb fc fc fc fc fc fc fc fc fa fb fb fb fb fb [ 35.904788] ffff88800fdb4200: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fc [ 35.905628] ================================================================== [ 35.906569] Disabling lock debugging due to kernel taint [ 38.394887] BUG: Bad rss-counter state mm:000000006eeeffbb type:MM_FILEPAGES val:33 [ 38.396210] BUG: Bad rss-counter state mm:000000006eeeffbb type:MM_ANONPAGES val:22 [ 38.787383] BUG: Bad rss-counter state mm:00000000d408c16c type:MM_FILEPAGES val:33 [ 38.788324] BUG: Bad rss-counter state mm:00000000d408c16c type:MM_ANONPAGES val:22 Warning: Permanently added '[localhost]:25915' (ECDSA) to the list of known hosts. 2023/06/19 21:47:08 fuzzer started 2023/06/19 21:47:08 dialing manager at localhost:44161 2023/06/19 21:47:08 checking machine... 2023/06/19 21:47:08 checking revisions... [ 39.451984] kmemleak: Automatic memory scanning thread ended 2023/06/19 21:47:08 testing simple program... [ 39.512010] cgroup: Unknown subsys name 'net' [ 39.551545] cgroup: Unknown subsys name 'rlimit' executing program executing program executing program VM DIAGNOSIS: 21:47:03 Registers: info registers vcpu 0 RAX=ffffffff846000aa RBX=ffffffff813ad420 RCX=0000000000000001 RDX=1ffff11002861e81 RSI=ffffffff846000aa RDI=ffff88801430f478 RBP=ffff88801430f448 RSP=ffff88801430f3a8 R8 =0000000000000001 R9 =ffff88801430f3f0 R10=0000000000038001 R11=00000000000b4fb9 R12=ffff88801430f478 R13=0000000000000000 R14=ffff88800fe2d1c0 R15=ffff88800ddb9000 RIP=ffffffff813ad424 RFL=00000286 [--S--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 00007fd2a28e0900 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=00007fd2a1cf28a0 CR3=000000000c4f2000 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=7a99be5aa7dc0cdf00000000000ae988 XMM05=8278440d1a28d1320000000000135920 XMM06=19e9129bd510f23500000000001347b8 XMM07=00000000000000000000000000000000 XMM08=415453454d49545f454d49544c414552 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=00007ffc46825000 CR3=000000000e636000 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=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