syzkaller login: [ 31.437688] BUG: Bad rss-counter state mm:00000000b4c4065f type:MM_FILEPAGES val:33 [ 31.438684] BUG: Bad rss-counter state mm:00000000b4c4065f type:MM_ANONPAGES val:22 [ 31.607496] ================================================================== [ 31.608613] BUG: KASAN: slab-use-after-free in vma_interval_tree_remove+0xc75/0xec0 [ 31.609708] Read of size 8 at addr ffff88800cb80b38 by task sshd/219 [ 31.610769] [ 31.611029] CPU: 1 PID: 219 Comm: sshd Not tainted 6.4.0-rc7-next-20230620 #1 [ 31.612048] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS 1.12.0-1 04/01/2014 [ 31.613192] Call Trace: [ 31.613517] [ 31.613800] dump_stack_lvl+0x91/0xf0 [ 31.614289] print_report+0xcc/0x620 [ 31.614769] ? __virt_addr_valid+0x102/0x340 [ 31.615321] ? vma_interval_tree_remove+0xc75/0xec0 [ 31.615942] ? vma_interval_tree_remove+0xc75/0xec0 [ 31.616558] kasan_report+0xbe/0xf0 [ 31.617041] ? vma_interval_tree_remove+0xc75/0xec0 [ 31.617660] vma_interval_tree_remove+0xc75/0xec0 [ 31.618259] vma_prepare+0xc54/0x11a0 [ 31.618731] __split_vma+0x5af/0x950 [ 31.619206] ? __pfx___split_vma+0x10/0x10 [ 31.619731] ? find_held_lock+0x2c/0x110 [ 31.620273] do_vmi_align_munmap+0x2ba/0x11f0 [ 31.620829] ? lock_is_held_type+0x9f/0x120 [ 31.621363] ? __pfx_do_vmi_align_munmap+0x10/0x10 [ 31.621983] ? mtree_range_walk+0x632/0x900 [ 31.622550] ? mas_walk+0x5c7/0x7c0 [ 31.623026] do_vmi_munmap+0x1f1/0x2b0 [ 31.623521] mmap_region+0x1f9/0x2660 [ 31.623997] ? vm_mmap_pgoff+0x15c/0x3a0 [ 31.624514] ? __pfx_arch_get_unmapped_area_topdown+0x10/0x10 [ 31.625228] ? __pfx_lock_acquire+0x10/0x10 [ 31.625756] ? __pfx_mmap_region+0x10/0x10 [ 31.626288] ? security_mmap_addr+0x7d/0xa0 [ 31.626816] ? get_unmapped_area+0x1f5/0x3f0 [ 31.627361] do_mmap+0x854/0xf00 [ 31.627797] vm_mmap_pgoff+0x1a6/0x3a0 [ 31.628299] ? __pfx_vm_mmap_pgoff+0x10/0x10 [ 31.628867] ksys_mmap_pgoff+0x3af/0x500 [ 31.629376] do_syscall_64+0x3f/0x90 [ 31.629856] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 31.630509] RIP: 0033:0x7fe13ec18d82 [ 31.630963] 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 [ 31.633268] RSP: 002b:00007ffd7a99d678 EFLAGS: 00000206 ORIG_RAX: 0000000000000009 [ 31.634210] RAX: ffffffffffffffda RBX: 0000000000000812 RCX: 00007fe13ec18d82 [ 31.635109] RDX: 0000000000000005 RSI: 0000000000001000 RDI: 00007fe13e052000 [ 31.636009] RBP: 00007fe13e052000 R08: 0000000000000009 R09: 0000000000001000 [ 31.636924] R10: 0000000000000812 R11: 0000000000000206 R12: 000055ac91738ec0 [ 31.637835] R13: 00007ffd7a99d690 R14: 00007ffd7a99d6c0 R15: 00007ffd7a99da20 [ 31.638751] [ 31.639055] [ 31.639278] Allocated by task 212: [ 31.639731] kasan_save_stack+0x22/0x50 [ 31.640273] kasan_set_track+0x25/0x30 [ 31.640795] __kasan_slab_alloc+0x59/0x70 [ 31.641350] kmem_cache_alloc+0x16b/0x370 [ 31.641901] vm_area_dup+0x20/0x160 [ 31.642381] __split_vma+0x170/0x950 [ 31.642872] split_vma+0xc6/0x110 [ 31.643335] mprotect_fixup+0x8d2/0xb30 [ 31.643865] do_mprotect_pkey+0x87e/0xd40 [ 31.644426] __x64_sys_mprotect+0x78/0xc0 [ 31.644965] do_syscall_64+0x3f/0x90 [ 31.645465] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 31.646140] [ 31.646366] Freed by task 19: [ 31.646768] kasan_save_stack+0x22/0x50 [ 31.647271] kasan_set_track+0x25/0x30 [ 31.647760] kasan_save_free_info+0x2b/0x50 [ 31.648316] __kasan_slab_free+0x10a/0x190 [ 31.648847] kmem_cache_free+0x10d/0x4d0 [ 31.649358] rcu_core+0x8c8/0x2860 [ 31.649797] __do_softirq+0x1b7/0x7d4 [ 31.650286] [ 31.650500] Last potentially related work creation: [ 31.651085] kasan_save_stack+0x22/0x50 [ 31.651663] __kasan_record_aux_stack+0x8e/0xa0 [ 31.652247] __call_rcu_common.constprop.0+0x6a/0xb90 [ 31.652885] remove_vma+0x139/0x170 [ 31.653332] do_vmi_align_munmap+0xd4a/0x11f0 [ 31.653888] do_vmi_munmap+0x1f1/0x2b0 [ 31.654371] __vm_munmap+0x138/0x3a0 [ 31.654835] __x64_sys_munmap+0x59/0x80 [ 31.655326] do_syscall_64+0x3f/0x90 [ 31.655797] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 31.656462] [ 31.656674] The buggy address belongs to the object at ffff88800cb80ae0 [ 31.656674] which belongs to the cache vm_area_struct of size 168 [ 31.658134] The buggy address is located 88 bytes inside of [ 31.658134] freed 168-byte region [ffff88800cb80ae0, ffff88800cb80b88) [ 31.659527] [ 31.659744] The buggy address belongs to the physical page: [ 31.660403] page:0000000062e954ec refcount:1 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0xcb80 [ 31.661481] memcg:ffff88800f130a01 [ 31.661907] flags: 0x100000000000200(slab|node=0|zone=1) [ 31.662557] page_type: 0xffffffff() [ 31.663003] raw: 0100000000000200 ffff8880087a0c80 dead000000000122 0000000000000000 [ 31.663912] raw: 0000000000000000 0000000000110011 00000001ffffffff ffff88800f130a01 [ 31.664821] page dumped because: kasan: bad access detected [ 31.665477] [ 31.665689] Memory state around the buggy address: [ 31.666270] ffff88800cb80a00: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 [ 31.667124] ffff88800cb80a80: 00 00 00 00 fc fc fc fc fc fc fc fc fa fb fb fb [ 31.667968] >ffff88800cb80b00: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb [ 31.668841] ^ [ 31.669443] ffff88800cb80b80: fb fc fc fc fc fc fc fc fc fa fb fb fb fb fb fb [ 31.670295] ffff88800cb80c00: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fc fc [ 31.671146] ================================================================== [ 31.672098] Disabling lock debugging due to kernel taint [ 34.059638] BUG: Bad rss-counter state mm:00000000e0537b1f type:MM_FILEPAGES val:33 [ 34.060871] BUG: Bad rss-counter state mm:00000000e0537b1f type:MM_ANONPAGES val:22 [ 34.458503] BUG: Bad rss-counter state mm:00000000662460f2 type:MM_FILEPAGES val:33 [ 34.460332] BUG: Bad rss-counter state mm:00000000662460f2 type:MM_ANONPAGES val:22 Warning: Permanently added '[localhost]:25652' (ECDSA) to the list of known hosts. 2023/06/21 04:54:35 fuzzer started 2023/06/21 04:54:35 dialing manager at localhost:36067 2023/06/21 04:54:35 checking machine... 2023/06/21 04:54:35 checking revisions... [ 35.183869] kmemleak: Automatic memory scanning thread ended 2023/06/21 04:54:35 testing simple program... [ 35.243316] cgroup: Unknown subsys name 'net' [ 35.315190] cgroup: Unknown subsys name 'rlimit' executing program executing program executing program VM DIAGNOSIS: 04:54:34 Registers: info registers vcpu 0 RAX=ffffffff8180ca5a RBX=ffffffff813ad470 RCX=ffffffff86139701 RDX=1ffff1100d9c135a RSI=ffffffff8180ca5a RDI=ffff88806ce09b40 RBP=ffff88806ce09b10 RSP=ffff88806ce09a70 R8 =ffffffff86139748 R9 =ffff88806ce09ab8 R10=0000000000038001 R11=0000000000020f03 R12=ffff88806ce09b40 R13=0000000000000000 R14=ffff88800ffa3680 R15=ffff888016e9eb00 RIP=ffffffff813ad474 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 00007fc07dbb2900 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=00007fc07e167650 CR3=00000000160b4000 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=ffffffff00ffffffffffffffffffffff XMM01=707465675f6c697475646f6d6d61705f XMM02=ff000000000000ff0000000000ff0000 XMM03=66207463656e6e6f6373696420646576 XMM04=00000000000000000000000000000000 XMM05=00000000000000000000000000000000 XMM06=0d0c0f0e09080b0a0504070601000302 XMM07=00000000000000000000000000000000 XMM08=000a0d732a2e25006c61746166003367 XMM09=00000000000000000000000000000000 XMM10=00000000000000000000000000000000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000 info registers vcpu 1 RAX=0000000000000000 RBX=ffff88800eef6dc0 RCX=00000000fffffeb8 RDX=0000000000000006 RSI=ffff88807ffdc000 RDI=ffff888016e9eb00 RBP=ffff888015c0f970 RSP=ffff888015c0f930 R8 =0000000000000000 R9 =0000000000000000 R10=ffffffff85d3d357 R11=00000000000b6a61 R12=ffff888008fae000 R13=ffffea00003bbd80 R14=ffffffff8366b8df R15=ffff888016e9eb00 RIP=ffffffff818398d6 RFL=00000206 [-----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 00007f1ed268b900 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=00007f1ed1a8bef0 CR3=000000000e4dc000 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=68bbb3df2f2a14b24c414eae17c977d2 XMM02=000000000011a138eff9b2d0a8fce9cb XMM03=000000000011a2082c67c8bc2e329bc3 XMM04=4cf8705b56c51bee00000000000ae988 XMM05=05eefc182f4a2ad100000000001329c0 XMM06=4fda316b135da52b00000000001317b0 XMM07=fb795ef6d65770560000000000121a50 XMM08=2c67c8bc2e329bc3000000000011a1a8 XMM09=00000000000000000000000000000000 XMM10=20200000000020202020202020200000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000