syzkaller login: [ 30.984753] BUG: Bad rss-counter state mm:00000000da2c684c type:MM_FILEPAGES val:33 [ 30.985977] BUG: Bad rss-counter state mm:00000000da2c684c type:MM_ANONPAGES val:22 [ 31.022644] ================================================================== [ 31.023555] BUG: KASAN: slab-use-after-free in vma_interval_tree_remove+0xc75/0xec0 [ 31.024654] Read of size 8 at addr ffff88800fa975c8 by task sshd/220 [ 31.025655] [ 31.025919] CPU: 0 PID: 220 Comm: sshd Not tainted 6.4.0-rc7-next-20230620 #1 [ 31.026933] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS 1.12.0-1 04/01/2014 [ 31.028086] Call Trace: [ 31.028467] [ 31.028802] dump_stack_lvl+0x91/0xf0 [ 31.029435] print_report+0xcc/0x620 [ 31.030031] ? __virt_addr_valid+0x102/0x340 [ 31.030719] ? vma_interval_tree_remove+0xc75/0xec0 [ 31.031483] ? vma_interval_tree_remove+0xc75/0xec0 [ 31.032262] kasan_report+0xbe/0xf0 [ 31.032850] ? vma_interval_tree_remove+0xc75/0xec0 [ 31.033635] vma_interval_tree_remove+0xc75/0xec0 [ 31.034389] vma_prepare+0xc54/0x11a0 [ 31.034989] __split_vma+0x5af/0x950 [ 31.035585] ? __pfx___split_vma+0x10/0x10 [ 31.036256] ? find_held_lock+0x2c/0x110 [ 31.036899] do_vmi_align_munmap+0x2ba/0x11f0 [ 31.037598] ? lock_is_held_type+0x9f/0x120 [ 31.038262] ? __pfx_do_vmi_align_munmap+0x10/0x10 [ 31.039013] ? mtree_range_walk+0x632/0x900 [ 31.039703] ? mas_walk+0x5c7/0x7c0 [ 31.040290] do_vmi_munmap+0x1f1/0x2b0 [ 31.040900] mmap_region+0x1f9/0x2660 [ 31.041532] ? vm_mmap_pgoff+0x15c/0x3a0 [ 31.042121] ? __pfx_arch_get_unmapped_area_topdown+0x10/0x10 [ 31.042832] ? __pfx_lock_acquire+0x10/0x10 [ 31.043378] ? __pfx_mmap_region+0x10/0x10 [ 31.043916] ? security_mmap_addr+0x7d/0xa0 [ 31.044459] ? get_unmapped_area+0x1f5/0x3f0 [ 31.045026] do_mmap+0x854/0xf00 [ 31.045467] vm_mmap_pgoff+0x1a6/0x3a0 [ 31.045960] ? __pfx_vm_mmap_pgoff+0x10/0x10 [ 31.046532] ksys_mmap_pgoff+0x3af/0x500 [ 31.047040] do_syscall_64+0x3f/0x90 [ 31.047521] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 31.048178] RIP: 0033:0x7f64e8f19d82 [ 31.048652] 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 [ 31.050786] RSP: 002b:00007ffdac3cc458 EFLAGS: 00000206 ORIG_RAX: 0000000000000009 [ 31.051705] RAX: ffffffffffffffda RBX: 0000000000000812 RCX: 00007f64e8f19d82 [ 31.052559] RDX: 0000000000000005 RSI: 0000000000001000 RDI: 00007f64e8353000 [ 31.053438] RBP: 00007f64e8353000 R08: 0000000000000009 R09: 0000000000001000 [ 31.054292] R10: 0000000000000812 R11: 0000000000000206 R12: 00005570fb85af70 [ 31.055145] R13: 00007ffdac3cc470 R14: 00007ffdac3cc4a0 R15: 00007ffdac3cc800 [ 31.056008] [ 31.056303] [ 31.056521] Allocated by task 213: [ 31.056949] kasan_save_stack+0x22/0x50 [ 31.057465] kasan_set_track+0x25/0x30 [ 31.057965] __kasan_slab_alloc+0x59/0x70 [ 31.058496] kmem_cache_alloc+0x16b/0x370 [ 31.059017] vm_area_dup+0x20/0x160 [ 31.059473] __split_vma+0x170/0x950 [ 31.059942] split_vma+0xc6/0x110 [ 31.060387] mprotect_fixup+0x8d2/0xb30 [ 31.060895] do_mprotect_pkey+0x87e/0xd40 [ 31.061447] __x64_sys_mprotect+0x78/0xc0 [ 31.061970] do_syscall_64+0x3f/0x90 [ 31.062455] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 31.063103] [ 31.063324] Freed by task 213: [ 31.063718] kasan_save_stack+0x22/0x50 [ 31.064223] kasan_set_track+0x25/0x30 [ 31.064718] kasan_save_free_info+0x2b/0x50 [ 31.065269] __kasan_slab_free+0x10a/0x190 [ 31.065803] kmem_cache_free+0x10d/0x4d0 [ 31.066321] rcu_core+0x8c8/0x2860 [ 31.066770] __do_softirq+0x1b7/0x7d4 [ 31.067261] [ 31.067478] Last potentially related work creation: [ 31.068061] kasan_save_stack+0x22/0x50 [ 31.068564] __kasan_record_aux_stack+0x8e/0xa0 [ 31.069146] __call_rcu_common.constprop.0+0x6a/0xb90 [ 31.069792] remove_vma+0x139/0x170 [ 31.070255] do_vmi_align_munmap+0xd4a/0x11f0 [ 31.070821] do_vmi_munmap+0x1f1/0x2b0 [ 31.071313] __vm_munmap+0x138/0x3a0 [ 31.071784] __x64_sys_munmap+0x59/0x80 [ 31.072277] do_syscall_64+0x3f/0x90 [ 31.072765] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 31.073442] [ 31.073654] The buggy address belongs to the object at ffff88800fa97570 [ 31.073654] which belongs to the cache vm_area_struct of size 168 [ 31.075154] The buggy address is located 88 bytes inside of [ 31.075154] freed 168-byte region [ffff88800fa97570, ffff88800fa97618) [ 31.076588] [ 31.076814] The buggy address belongs to the physical page: [ 31.077478] page:00000000bbec9072 refcount:1 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0xfa97 [ 31.078580] memcg:ffff88800c810601 [ 31.079015] flags: 0x100000000000200(slab|node=0|zone=1) [ 31.079657] page_type: 0xffffffff() [ 31.080106] raw: 0100000000000200 ffff8880087a0c80 dead000000000122 0000000000000000 [ 31.081045] raw: 0000000000000000 0000000000110011 00000001ffffffff ffff88800c810601 [ 31.081950] page dumped because: kasan: bad access detected [ 31.082617] [ 31.082838] Memory state around the buggy address: [ 31.083420] ffff88800fa97480: fc 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 [ 31.084269] ffff88800fa97500: 00 00 00 00 00 00 fc fc fc fc fc fc fc fc fa fb [ 31.085151] >ffff88800fa97580: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb [ 31.085996] ^ [ 31.086655] ffff88800fa97600: fb fb fb fc fc fc fc fc fc fc fc fa fb fb fb fb [ 31.087524] ffff88800fa97680: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb [ 31.088370] ================================================================== [ 31.089430] Disabling lock debugging due to kernel taint [ 33.155297] BUG: Bad rss-counter state mm:00000000670aa827 type:MM_FILEPAGES val:33 [ 33.156340] BUG: Bad rss-counter state mm:00000000670aa827 type:MM_ANONPAGES val:22 [ 33.675919] BUG: Bad rss-counter state mm:000000000c985d7a type:MM_FILEPAGES val:33 [ 33.677088] BUG: Bad rss-counter state mm:000000000c985d7a type:MM_ANONPAGES val:22 Warning: Permanently added '[localhost]:46813' (ECDSA) to the list of known hosts. 2023/06/20 17:49:52 fuzzer started 2023/06/20 17:49:52 dialing manager at localhost:36067 2023/06/20 17:49:52 checking machine... 2023/06/20 17:49:52 checking revisions... [ 34.306393] kmemleak: Automatic memory scanning thread ended 2023/06/20 17:49:53 testing simple program... [ 34.354556] cgroup: Unknown subsys name 'net' [ 34.394415] cgroup: Unknown subsys name 'rlimit' executing program executing program executing program VM DIAGNOSIS: 17:49:52 Registers: info registers vcpu 0 RAX=0000000000000000 RBX=dffffc0000000000 RCX=0000000000000000 RDX=ffff888016b451c0 RSI=ffffffff81ef71c7 RDI=ffff888008e62480 RBP=0000000000000001 RSP=ffff8880146ef408 R8 =0000000000000004 R9 =0000000000000001 R10=0000000000000001 R11=00676f6c7379732f R12=ffff888008e62478 R13=0000000000000008 R14=0000000000000005 R15=0000000000000008 RIP=ffffffff81ef71e9 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 00007f5c0dfb0900 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=00007f5c0d432380 CR3=00000000098ee000 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=756f6a2f646d65747379732f6e75722f XMM01=00676f6c7379732f6c616e72756f6a2f XMM02=756f6a2f646d65747379732f6e75722f XMM03=006c616e72756f6a2f646d6574737973 XMM04=3f6d31e0dd3d0ad400000000000ae988 XMM05=08fc54c4609cb3410000000000134b00 XMM06=4a92b598160faa2e00000000001338a0 XMM07=fb795ef6d657705600000000001242f8 XMM08=4f5453444600273d67736d000d0a0920 XMM09=00000000000000000000000000000000 XMM10=20200000000020202020202020200000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000 info registers vcpu 1 RAX=0000000000000001 RBX=dffffc0000000000 RCX=0000000000000000 RDX=1ffff11001efbb19 RSI=ffff88801921c9e8 RDI=ffff88800f7dd8c8 RBP=ffff88800f7da528 RSP=ffff88800fe478c8 R8 =0000000000000001 R9 =ffffed1001fc8f11 R10=0000000000000003 R11=00000000000b6a61 R12=ffff88800f7dd8b8 R13=fffffbfff0f713f0 R14=0000000000000000 R15=ffffffff87b89f80 RIP=ffffffff844d249b RFL=00000046 [---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 00007f010b272900 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=00007ffe6ff1c000 CR3=00000000099b0000 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