syzkaller login: [ 30.389556] BUG: Bad rss-counter state mm:00000000d278a488 type:MM_FILEPAGES val:33 [ 30.390450] BUG: Bad rss-counter state mm:00000000d278a488 type:MM_ANONPAGES val:22 [ 30.508201] ================================================================== [ 30.508907] BUG: KASAN: slab-use-after-free in vma_interval_tree_remove+0xc75/0xec0 [ 30.509581] Read of size 8 at addr ffff88801696f4e0 by task sshd/221 [ 30.510086] [ 30.510239] CPU: 0 PID: 221 Comm: sshd Not tainted 6.4.0-rc7-next-20230620 #1 [ 30.510855] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS 1.12.0-1 04/01/2014 [ 30.511555] Call Trace: [ 30.511789] [ 30.511990] dump_stack_lvl+0x91/0xf0 [ 30.512616] print_report+0xcc/0x620 [ 30.512970] ? __virt_addr_valid+0x102/0x340 [ 30.513378] ? vma_interval_tree_remove+0xc75/0xec0 [ 30.513781] ? vma_interval_tree_remove+0xc75/0xec0 [ 30.514213] kasan_report+0xbe/0xf0 [ 30.514577] ? vma_interval_tree_remove+0xc75/0xec0 [ 30.515038] vma_interval_tree_remove+0xc75/0xec0 [ 30.515479] vma_prepare+0xc54/0x11a0 [ 30.515826] __split_vma+0x5af/0x950 [ 30.516176] ? __pfx___split_vma+0x10/0x10 [ 30.516595] ? find_held_lock+0x2c/0x110 [ 30.516966] do_vmi_align_munmap+0x2ba/0x11f0 [ 30.517340] ? lock_is_held_type+0x9f/0x120 [ 30.517702] ? __pfx_do_vmi_align_munmap+0x10/0x10 [ 30.518157] ? mtree_range_walk+0x632/0x900 [ 30.518566] ? mas_walk+0x5c7/0x7c0 [ 30.518918] do_vmi_munmap+0x1f1/0x2b0 [ 30.519265] mmap_region+0x1f9/0x2660 [ 30.519630] ? vm_mmap_pgoff+0x15c/0x3a0 [ 30.520035] ? __pfx_arch_get_unmapped_area_topdown+0x10/0x10 [ 30.520584] ? __pfx_lock_acquire+0x10/0x10 [ 30.520962] ? __pfx_mmap_region+0x10/0x10 [ 30.521331] ? security_mmap_addr+0x7d/0xa0 [ 30.521693] ? get_unmapped_area+0x1f5/0x3f0 [ 30.522115] do_mmap+0x854/0xf00 [ 30.522438] vm_mmap_pgoff+0x1a6/0x3a0 [ 30.522797] ? __pfx_vm_mmap_pgoff+0x10/0x10 [ 30.523219] ksys_mmap_pgoff+0x3af/0x500 [ 30.523567] do_syscall_64+0x3f/0x90 [ 30.523935] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 30.524454] RIP: 0033:0x7f6e0f7f1d82 [ 30.524772] 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 [ 30.526293] RSP: 002b:00007ffe86051398 EFLAGS: 00000206 ORIG_RAX: 0000000000000009 [ 30.526904] RAX: ffffffffffffffda RBX: 0000000000000812 RCX: 00007f6e0f7f1d82 [ 30.527478] RDX: 0000000000000005 RSI: 0000000000001000 RDI: 00007f6e0ec2b000 [ 30.528088] RBP: 00007f6e0ec2b000 R08: 0000000000000009 R09: 0000000000001000 [ 30.528686] R10: 0000000000000812 R11: 0000000000000206 R12: 0000555c5b821ec0 [ 30.529275] R13: 00007ffe860513b0 R14: 00007ffe860513e0 R15: 00007ffe86051740 [ 30.529909] [ 30.530114] [ 30.530263] Allocated by task 214: [ 30.530543] kasan_save_stack+0x22/0x50 [ 30.530904] kasan_set_track+0x25/0x30 [ 30.531247] __kasan_slab_alloc+0x59/0x70 [ 30.531595] kmem_cache_alloc+0x16b/0x370 [ 30.531943] vm_area_dup+0x20/0x160 [ 30.532254] __split_vma+0x170/0x950 [ 30.532648] split_vma+0xc6/0x110 [ 30.532946] mprotect_fixup+0x8d2/0xb30 [ 30.533301] do_mprotect_pkey+0x87e/0xd40 [ 30.533656] __x64_sys_mprotect+0x78/0xc0 [ 30.533990] do_syscall_64+0x3f/0x90 [ 30.534296] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 30.534701] [ 30.534839] Freed by task 203: [ 30.535089] kasan_save_stack+0x22/0x50 [ 30.535412] kasan_set_track+0x25/0x30 [ 30.535745] kasan_save_free_info+0x2b/0x50 [ 30.536119] __kasan_slab_free+0x10a/0x190 [ 30.536515] kmem_cache_free+0x10d/0x4d0 [ 30.536863] rcu_core+0x8c8/0x2860 [ 30.537167] __do_softirq+0x1b7/0x7d4 [ 30.537485] [ 30.537628] Last potentially related work creation: [ 30.538030] kasan_save_stack+0x22/0x50 [ 30.538377] __kasan_record_aux_stack+0x8e/0xa0 [ 30.538786] __call_rcu_common.constprop.0+0x6a/0xb90 [ 30.539239] remove_vma+0x139/0x170 [ 30.539553] do_vmi_align_munmap+0xd4a/0x11f0 [ 30.539936] do_vmi_munmap+0x1f1/0x2b0 [ 30.540270] __vm_munmap+0x138/0x3a0 [ 30.540646] __x64_sys_munmap+0x59/0x80 [ 30.540996] do_syscall_64+0x3f/0x90 [ 30.541311] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 30.541752] [ 30.541899] The buggy address belongs to the object at ffff88801696f488 [ 30.541899] which belongs to the cache vm_area_struct of size 168 [ 30.542929] The buggy address is located 88 bytes inside of [ 30.542929] freed 168-byte region [ffff88801696f488, ffff88801696f530) [ 30.543841] [ 30.544013] The buggy address belongs to the physical page: [ 30.544512] page:00000000da40576e refcount:1 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0x1696f [ 30.545271] memcg:ffff88801986d801 [ 30.545559] flags: 0x100000000000200(slab|node=0|zone=1) [ 30.545985] page_type: 0xffffffff() [ 30.546281] raw: 0100000000000200 ffff8880087a0c80 dead000000000122 0000000000000000 [ 30.546888] raw: 0000000000000000 0000000000110011 00000001ffffffff ffff88801986d801 [ 30.547486] page dumped because: kasan: bad access detected [ 30.547942] [ 30.548112] Memory state around the buggy address: [ 30.548507] ffff88801696f380: fc fc fc fc 00 00 00 00 00 00 00 00 00 00 00 00 [ 30.549086] ffff88801696f400: 00 00 00 00 00 00 00 00 00 fc fc fc fc fc fc fc [ 30.549632] >ffff88801696f480: fc fa fb fb fb fb fb fb fb fb fb fb fb fb fb fb [ 30.550245] ^ [ 30.550754] ffff88801696f500: fb fb fb fb fb fb fc fc fc fc fc fc fc fc fa fb [ 30.551351] ffff88801696f580: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb [ 30.551945] ================================================================== [ 30.552942] Disabling lock debugging due to kernel taint [ 32.556103] BUG: Bad rss-counter state mm:000000004da5c67b type:MM_FILEPAGES val:33 [ 32.556948] BUG: Bad rss-counter state mm:000000004da5c67b type:MM_ANONPAGES val:22 [ 32.865902] BUG: Bad rss-counter state mm:000000001edb0f8e type:MM_FILEPAGES val:33 [ 32.867016] BUG: Bad rss-counter state mm:000000001edb0f8e type:MM_ANONPAGES val:22 Warning: Permanently added '[localhost]:56282' (ECDSA) to the list of known hosts. 2023/06/21 09:26:52 fuzzer started 2023/06/21 09:26:52 dialing manager at localhost:36067 2023/06/21 09:26:53 checking machine... 2023/06/21 09:26:53 checking revisions... [ 34.008633] kmemleak: Automatic memory scanning thread ended 2023/06/21 09:26:53 testing simple program... [ 34.049123] cgroup: Unknown subsys name 'net' [ 34.093350] cgroup: Unknown subsys name 'rlimit' executing program executing program VM DIAGNOSIS: 09:26:52 Registers: info registers vcpu 0 RAX=dffffc0000000000 RBX=0000000000000001 RCX=ffffffff8121b48a RDX=00000000000021b4 RSI=00000000000021b4 RDI=ffffffff864f20c0 RBP=ffff888008d9f9d0 RSP=ffff888008d9f908 R8 =0000000000000000 R9 =ffff888008d9f9b8 R10=0000000000038001 R11=00000000000078fb R12=ffff888008d9f9d8 R13=ffff888008d9f9c0 R14=ffff888008d9f9b9 R15=ffff888008d9f978 RIP=ffffffff8113077a 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 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=00007f2e2c8de5e0 CR3=0000000018e46000 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=36323a3930203132206e754a3e36383c XMM01=7365733a646873732878696e755f6d61 XMM02=736f6c63206e6f6973736573203a296e XMM03=5f6d6170203a5d3033325b6468737320 XMM04=6456774875434142334f726f59427469 XMM05=485320415352203a3268737320383731 XMM06=206d6f726620746f6f7220726f662079 XMM07=00000000000000000000000000000000 XMM08=3a677562656420676f6c737973720000 XMM09=00000000000000000000000000000000 XMM10=00000000000000000000000000000000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000 info registers vcpu 1 RAX=0000000000000003 RBX=1ffff11001ae6e82 RCX=0000000000000000 RDX=0000000000000000 RSI=0000000000000008 RDI=ffffffff85d3d350 RBP=0000000000000000 RSP=ffff88800d737400 R8 =0000000000000000 R9 =fffffbfff0ba7a6a R10=ffffffff85d3d357 R11=00000000000b6a61 R12=0000000000000002 R13=0000000000000000 R14=ffffffff8560b640 R15=0000000000000000 RIP=ffffffff812d8f5a 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 00007f4fe1665900 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=000055dd6143c954 CR3=0000000019da8000 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=6720646572637465733a4d41503d706f XMM01=652022746f6f72223d74636361207469 XMM02=3d6c616e696d72657420322e322e302e XMM03=3d656d616e74736f682022646873732f XMM04=40404040404040404040404040404040 XMM05=5a5a5a5a5a5a5a5a5a5a5a5a5a5a5a5a XMM06=20202020202020202020202020202020 XMM07=00000000000000000000000000000000 XMM08=652075253d64692073253d706f000000 XMM09=00000000000000000000000000000000 XMM10=00000000000000000000000000000000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000