syzkaller login: [ 31.323901] BUG: Bad rss-counter state mm:00000000a7d77060 type:MM_FILEPAGES val:33 [ 31.324925] BUG: Bad rss-counter state mm:00000000a7d77060 type:MM_ANONPAGES val:22 [ 31.492672] ================================================================== [ 31.493756] BUG: KASAN: slab-use-after-free in vma_interval_tree_remove+0xc75/0xec0 [ 31.494965] Read of size 8 at addr ffff88800de0bdf0 by task sshd/219 [ 31.495863] [ 31.496086] CPU: 0 PID: 219 Comm: sshd Not tainted 6.4.0-rc7-next-20230619 #1 [ 31.496958] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS 1.12.0-1 04/01/2014 [ 31.497980] Call Trace: [ 31.498303] [ 31.498592] dump_stack_lvl+0x91/0xf0 [ 31.499096] print_report+0xcc/0x620 [ 31.499593] ? __virt_addr_valid+0x102/0x340 [ 31.500158] ? vma_interval_tree_remove+0xc75/0xec0 [ 31.500796] ? vma_interval_tree_remove+0xc75/0xec0 [ 31.501421] kasan_report+0xbe/0xf0 [ 31.501914] ? vma_interval_tree_remove+0xc75/0xec0 [ 31.502538] vma_interval_tree_remove+0xc75/0xec0 [ 31.503147] vma_prepare+0xc54/0x11a0 [ 31.503650] __split_vma+0x5af/0x950 [ 31.504122] ? __pfx___split_vma+0x10/0x10 [ 31.504650] ? find_held_lock+0x2c/0x110 [ 31.505172] do_vmi_align_munmap+0x2ba/0x11f0 [ 31.505746] ? lock_is_held_type+0x9f/0x120 [ 31.506290] ? __pfx_do_vmi_align_munmap+0x10/0x10 [ 31.506898] ? mtree_range_walk+0x632/0x900 [ 31.507480] ? mas_walk+0x5c7/0x7c0 [ 31.507960] do_vmi_munmap+0x1f1/0x2b0 [ 31.508461] mmap_region+0x1f9/0x2660 [ 31.508952] ? vm_mmap_pgoff+0x15c/0x3a0 [ 31.509459] ? __pfx_arch_get_unmapped_area_topdown+0x10/0x10 [ 31.510181] ? __pfx_lock_acquire+0x10/0x10 [ 31.510720] ? __pfx_mmap_region+0x10/0x10 [ 31.511279] ? security_mmap_addr+0x7d/0xa0 [ 31.511802] ? get_unmapped_area+0x1f5/0x3f0 [ 31.512351] do_mmap+0x854/0xf00 [ 31.512794] vm_mmap_pgoff+0x1a6/0x3a0 [ 31.513290] ? __pfx_vm_mmap_pgoff+0x10/0x10 [ 31.513859] ksys_mmap_pgoff+0x3af/0x500 [ 31.514379] do_syscall_64+0x3f/0x90 [ 31.514859] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 31.515525] RIP: 0033:0x7fa7d1a55d82 [ 31.515989] 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 [ 31.518087] RSP: 002b:00007ffea5323ef8 EFLAGS: 00000206 ORIG_RAX: 0000000000000009 [ 31.518976] RAX: ffffffffffffffda RBX: 0000000000000812 RCX: 00007fa7d1a55d82 [ 31.519847] RDX: 0000000000000005 RSI: 0000000000001000 RDI: 00007fa7d0e8f000 [ 31.520746] RBP: 00007fa7d0e8f000 R08: 0000000000000009 R09: 0000000000001000 [ 31.521773] R10: 0000000000000812 R11: 0000000000000206 R12: 000055da65e5df70 [ 31.522629] R13: 00007ffea5323f10 R14: 00007ffea5323f40 R15: 00007ffea53242a0 [ 31.523517] [ 31.523821] [ 31.524045] Allocated by task 212: [ 31.524556] kasan_save_stack+0x22/0x50 [ 31.525090] kasan_set_track+0x25/0x30 [ 31.525589] __kasan_slab_alloc+0x59/0x70 [ 31.526118] kmem_cache_alloc+0x16b/0x370 [ 31.526646] vm_area_dup+0x20/0x160 [ 31.527121] __split_vma+0x170/0x950 [ 31.527608] split_vma+0xc6/0x110 [ 31.528065] mprotect_fixup+0x8d2/0xb30 [ 31.528584] do_mprotect_pkey+0x87e/0xd40 [ 31.529137] __x64_sys_mprotect+0x78/0xc0 [ 31.529677] do_syscall_64+0x3f/0x90 [ 31.530161] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 31.530814] [ 31.531039] Freed by task 212: [ 31.531465] kasan_save_stack+0x22/0x50 [ 31.531985] kasan_set_track+0x25/0x30 [ 31.532485] kasan_save_free_info+0x2b/0x50 [ 31.533026] __kasan_slab_free+0x10a/0x190 [ 31.533573] kmem_cache_free+0x10d/0x4d0 [ 31.534090] rcu_core+0x8c8/0x2860 [ 31.534539] __do_softirq+0x1b7/0x7d4 [ 31.535029] [ 31.535281] Last potentially related work creation: [ 31.535878] kasan_save_stack+0x22/0x50 [ 31.536388] __kasan_record_aux_stack+0x8e/0xa0 [ 31.536977] __call_rcu_common.constprop.0+0x6a/0xb90 [ 31.537635] remove_vma+0x139/0x170 [ 31.538092] do_vmi_align_munmap+0xd4a/0x11f0 [ 31.538659] do_vmi_munmap+0x1f1/0x2b0 [ 31.539163] __vm_munmap+0x138/0x3a0 [ 31.539657] __x64_sys_munmap+0x59/0x80 [ 31.540163] do_syscall_64+0x3f/0x90 [ 31.540638] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 31.541275] [ 31.541489] The buggy address belongs to the object at ffff88800de0bd98 [ 31.541489] which belongs to the cache vm_area_struct of size 168 [ 31.542957] The buggy address is located 88 bytes inside of [ 31.542957] freed 168-byte region [ffff88800de0bd98, ffff88800de0be40) [ 31.544353] [ 31.544572] The buggy address belongs to the physical page: [ 31.545241] page:0000000059f5b46f refcount:1 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0xde0b [ 31.546334] memcg:ffff88800edc2401 [ 31.546760] flags: 0x100000000000200(slab|node=0|zone=1) [ 31.547443] page_type: 0xffffffff() [ 31.547913] raw: 0100000000000200 ffff88800879fc80 ffffea000024ee80 dead000000000004 [ 31.548874] raw: 0000000000000000 0000000000110011 00000001ffffffff ffff88800edc2401 [ 31.549821] page dumped because: kasan: bad access detected [ 31.550503] [ 31.550727] Memory state around the buggy address: [ 31.551329] ffff88800de0bc80: fc fc fc fc fc fc 00 00 00 00 00 00 00 00 00 00 [ 31.552213] ffff88800de0bd00: 00 00 00 00 00 00 00 00 00 00 00 fc fc fc fc fc [ 31.553107] >ffff88800de0bd80: fc fc fc fa fb fb fb fb fb fb fb fb fb fb fb fb [ 31.553996] ^ [ 31.554851] ffff88800de0be00: fb fb fb fb fb fb fb fb fc fc fc fc fc fc fc fc [ 31.555751] ffff88800de0be80: fa fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb [ 31.556618] ================================================================== [ 31.557912] Disabling lock debugging due to kernel taint [ 33.875571] BUG: Bad rss-counter state mm:000000000ef8b38c type:MM_FILEPAGES val:33 [ 33.876847] BUG: Bad rss-counter state mm:000000000ef8b38c type:MM_ANONPAGES val:22 [ 34.349414] BUG: Bad rss-counter state mm:0000000071e2d542 type:MM_FILEPAGES val:33 [ 34.350576] BUG: Bad rss-counter state mm:0000000071e2d542 type:MM_ANONPAGES val:22 Warning: Permanently added '[localhost]:56256' (ECDSA) to the list of known hosts. 2023/06/20 03:11:56 fuzzer started 2023/06/20 03:11:56 dialing manager at localhost:44161 2023/06/20 03:11:56 checking machine... 2023/06/20 03:11:56 checking revisions... [ 35.036566] kmemleak: Automatic memory scanning thread ended 2023/06/20 03:11:56 testing simple program... [ 35.092581] cgroup: Unknown subsys name 'net' [ 35.140784] cgroup: Unknown subsys name 'rlimit' executing program executing program executing program VM DIAGNOSIS: 03:11:56 Registers: info registers vcpu 0 RAX=0000000000000008 RBX=0000000066adbd68 RCX=ffff88806cadeb40 RDX=000000000000000f RSI=ffffffff83c1e692 RDI=000000004bf1a259 RBP=ffff88800cc00df0 RSP=ffff88800fc7f8b8 R8 =00000000ae750413 R9 =fffffbfff0ba77da R10=ffffffff85d3bed7 R11=00000000000b6996 R12=0000000000000001 R13=0000000000092cc0 R14=ffff88800fc7f920 R15=000000000000000f RIP=ffffffff82270f40 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 00007f447391c900 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=00007f4473ed1650 CR3=000000000edee000 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=00000000000000000000000000000000 XMM01=000000000000000000000000000000ff XMM02=000000000000000000000000000000ff XMM03=5320444f4854454d5f54505952434e45 XMM04=40404040404040404040404040404040 XMM05=5a5a5a5a5a5a5a5a5a5a5a5a5a5a5a5a XMM06=20202020202020202020202020202020 XMM07=00000000000000000000000000000000 XMM08=ffbc64ffffbc44ffffbc34ffffbc9f00 XMM09=00000000000000000000000000000000 XMM10=00000000000000000000000000000000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000 info registers vcpu 1 RAX=dffffc0000000000 RBX=ffff88806cf39500 RCX=0000000000000000 RDX=ffff8880147f7aa8 RSI=ffff8880147f7aa8 RDI=ffff88806cf39500 RBP=ffff8880147f7aa8 RSP=ffff8880147f79c0 R8 =0000000000000000 R9 =fffffbfff0ba77da R10=ffffffff85d3bed7 R11=0000000000000001 R12=ffffed100d9e72ba R13=ffff888015f351c0 R14=ffff88806cf395d0 R15=ffff8880147f7aa8 RIP=ffffffff8126f2bc RFL=00000082 [--S----] 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 00007f1d6e63a900 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=00007f1d6dabb980 CR3=0000000013aa8000 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=8f0ab1c02438079a804e23977f6d13ad XMM02=ec2efd57dc4c00df000000000011bc18 XMM03=80deb2d54fe1478e000000000011bce8 XMM04=2d6eb8c8c242445900000000000ae988 XMM05=67ba442c4a2684d00000000000134368 XMM06=806171799158d9670000000000133408 XMM07=e042d86d42eb936e0000000000123bf0 XMM08=80deb2d54fe1478e000000000011bce8 XMM09=00000000000000000000000000000000 XMM10=00000000000000000000000000000000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000