syzkaller login: [ 36.955033] BUG: Bad rss-counter state mm:00000000fb324219 type:MM_FILEPAGES val:33 [ 36.956522] BUG: Bad rss-counter state mm:00000000fb324219 type:MM_ANONPAGES val:22 [ 37.033169] ================================================================== [ 37.034289] BUG: KASAN: slab-use-after-free in vma_interval_tree_remove+0xc75/0xec0 [ 37.035489] Read of size 8 at addr ffff88800fdec5c8 by task sshd/220 [ 37.036576] [ 37.036792] CPU: 1 PID: 220 Comm: sshd Not tainted 6.4.0-rc7-next-20230619 #1 [ 37.037637] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS 1.12.0-1 04/01/2014 [ 37.038601] Call Trace: [ 37.038918] [ 37.039202] dump_stack_lvl+0x91/0xf0 [ 37.039664] print_report+0xcc/0x620 [ 37.040150] ? __virt_addr_valid+0x102/0x340 [ 37.040679] ? vma_interval_tree_remove+0xc75/0xec0 [ 37.041286] ? vma_interval_tree_remove+0xc75/0xec0 [ 37.041874] kasan_report+0xbe/0xf0 [ 37.042346] ? vma_interval_tree_remove+0xc75/0xec0 [ 37.042962] vma_interval_tree_remove+0xc75/0xec0 [ 37.043543] vma_prepare+0xc54/0x11a0 [ 37.044016] __split_vma+0x5af/0x950 [ 37.044462] ? __pfx___split_vma+0x10/0x10 [ 37.044978] ? find_held_lock+0x2c/0x110 [ 37.045480] do_vmi_align_munmap+0x2ba/0x11f0 [ 37.046026] ? lock_is_held_type+0x9f/0x120 [ 37.046548] ? __pfx_do_vmi_align_munmap+0x10/0x10 [ 37.047144] ? mtree_range_walk+0x632/0x900 [ 37.047664] ? mas_walk+0x5c7/0x7c0 [ 37.048128] do_vmi_munmap+0x1f1/0x2b0 [ 37.048593] mmap_region+0x1f9/0x2660 [ 37.049083] ? vm_mmap_pgoff+0x15c/0x3a0 [ 37.049572] ? __pfx_arch_get_unmapped_area_topdown+0x10/0x10 [ 37.050271] ? __pfx_lock_acquire+0x10/0x10 [ 37.050807] ? __pfx_mmap_region+0x10/0x10 [ 37.051340] ? security_mmap_addr+0x7d/0xa0 [ 37.051848] ? get_unmapped_area+0x1f5/0x3f0 [ 37.052395] do_mmap+0x854/0xf00 [ 37.052815] vm_mmap_pgoff+0x1a6/0x3a0 [ 37.053324] ? __pfx_vm_mmap_pgoff+0x10/0x10 [ 37.053860] ksys_mmap_pgoff+0x3af/0x500 [ 37.054362] do_syscall_64+0x3f/0x90 [ 37.054832] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 37.055469] RIP: 0033:0x7f551e7d9d82 [ 37.055902] 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 [ 37.057950] RSP: 002b:00007ffee8ea1b18 EFLAGS: 00000206 ORIG_RAX: 0000000000000009 [ 37.058841] RAX: ffffffffffffffda RBX: 0000000000000812 RCX: 00007f551e7d9d82 [ 37.059665] RDX: 0000000000000005 RSI: 0000000000001000 RDI: 00007f551dc13000 [ 37.060482] RBP: 00007f551dc13000 R08: 0000000000000009 R09: 0000000000001000 [ 37.061299] R10: 0000000000000812 R11: 0000000000000206 R12: 000055f203975b20 [ 37.062129] R13: 00007ffee8ea1b30 R14: 00007ffee8ea1b60 R15: 00007ffee8ea1ec0 [ 37.062972] [ 37.063254] [ 37.063459] Allocated by task 213: [ 37.063870] kasan_save_stack+0x22/0x50 [ 37.064371] kasan_set_track+0x25/0x30 [ 37.064849] __kasan_slab_alloc+0x59/0x70 [ 37.065364] kmem_cache_alloc+0x16b/0x370 [ 37.065855] vm_area_dup+0x20/0x160 [ 37.066316] __split_vma+0x170/0x950 [ 37.066773] split_vma+0xc6/0x110 [ 37.067212] mprotect_fixup+0x8d2/0xb30 [ 37.067691] do_mprotect_pkey+0x87e/0xd40 [ 37.068204] __x64_sys_mprotect+0x78/0xc0 [ 37.068699] do_syscall_64+0x3f/0x90 [ 37.069165] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 37.069773] [ 37.069988] Freed by task 203: [ 37.070363] kasan_save_stack+0x22/0x50 [ 37.070868] kasan_set_track+0x25/0x30 [ 37.071362] kasan_save_free_info+0x2b/0x50 [ 37.071868] __kasan_slab_free+0x10a/0x190 [ 37.072394] kmem_cache_free+0x10d/0x4d0 [ 37.072875] rcu_core+0x8c8/0x2860 [ 37.073314] __do_softirq+0x1b7/0x7d4 [ 37.073791] [ 37.074018] Last potentially related work creation: [ 37.074594] kasan_save_stack+0x22/0x50 [ 37.075092] __kasan_record_aux_stack+0x8e/0xa0 [ 37.075639] __call_rcu_common.constprop.0+0x6a/0xb90 [ 37.076263] remove_vma+0x139/0x170 [ 37.076693] do_vmi_align_munmap+0xd4a/0x11f0 [ 37.077370] do_vmi_munmap+0x1f1/0x2b0 [ 37.077882] __vm_munmap+0x138/0x3a0 [ 37.078360] __x64_sys_munmap+0x59/0x80 [ 37.078862] do_syscall_64+0x3f/0x90 [ 37.079343] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 37.079959] [ 37.080177] The buggy address belongs to the object at ffff88800fdec570 [ 37.080177] which belongs to the cache vm_area_struct of size 168 [ 37.081603] The buggy address is located 88 bytes inside of [ 37.081603] freed 168-byte region [ffff88800fdec570, ffff88800fdec618) [ 37.082973] [ 37.083188] The buggy address belongs to the physical page: [ 37.083811] page:000000009867d536 refcount:1 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0xfdec [ 37.084850] memcg:ffff88800f100f01 [ 37.085271] flags: 0x100000000000200(slab|node=0|zone=1) [ 37.085883] page_type: 0xffffffff() [ 37.086326] raw: 0100000000000200 ffff88800879fc80 dead000000000122 0000000000000000 [ 37.087224] raw: 0000000000000000 0000000000110011 00000001ffffffff ffff88800f100f01 [ 37.088097] page dumped because: kasan: bad access detected [ 37.088718] [ 37.088922] Memory state around the buggy address: [ 37.089484] ffff88800fdec480: fc 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 [ 37.090306] ffff88800fdec500: 00 00 00 00 00 00 fc fc fc fc fc fc fc fc fa fb [ 37.091153] >ffff88800fdec580: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb [ 37.091989] ^ [ 37.092650] ffff88800fdec600: fb fb fb fc fc fc fc fc fc fc fc fa fb fb fb fb [ 37.093517] ffff88800fdec680: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb [ 37.094389] ================================================================== [ 37.095347] Disabling lock debugging due to kernel taint [ 39.041003] BUG: Bad rss-counter state mm:00000000772dd640 type:MM_FILEPAGES val:33 [ 39.041831] BUG: Bad rss-counter state mm:00000000772dd640 type:MM_ANONPAGES val:22 [ 39.497391] BUG: Bad rss-counter state mm:00000000a47d2c0c type:MM_FILEPAGES val:33 [ 39.498189] BUG: Bad rss-counter state mm:00000000a47d2c0c type:MM_ANONPAGES val:22 Warning: Permanently added '[localhost]:61453' (ECDSA) to the list of known hosts. 2023/06/19 22:59:13 fuzzer started 2023/06/19 22:59:14 dialing manager at localhost:44161 2023/06/19 22:59:14 checking machine... 2023/06/19 22:59:14 checking revisions... [ 40.084643] kmemleak: Automatic memory scanning thread ended 2023/06/19 22:59:14 testing simple program... [ 40.121622] cgroup: Unknown subsys name 'net' [ 40.153461] cgroup: Unknown subsys name 'rlimit' executing program executing program executing program VM DIAGNOSIS: 22:59:08 Registers: info registers vcpu 0 RAX=ffffffff83c1efd7 RBX=ffffffff813ad420 RCX=0000000000000001 RDX=1ffff1100302bf1b RSI=ffffffff83c1efd7 RDI=ffff88801815f948 RBP=ffff88801815f918 RSP=ffff88801815f878 R8 =0000000000000001 R9 =ffff88801815f8c0 R10=0000000000038001 R11=000000000009a980 R12=ffff88801815f948 R13=0000000000000000 R14=ffff888016dc0000 R15=ffff88801815fe9e RIP=ffffffff84532440 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 00007fb7c4737900 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=00007fb7c4cec650 CR3=000000000e4ec000 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=0000000080000000 RBX=0000000000000000 RCX=0000000000000000 RDX=1ffff11001db6818 RSI=ffffffff82246fb5 RDI=ffff88800edb40c0 RBP=ffff88800edb4000 RSP=ffff88801815f390 R8 =0000000000000005 R9 =0000000000000000 R10=0000000000000000 R11=00000000000b6996 R12=0000000000000003 R13=0000000000000003 R14=ffff888008cdc34c R15=0000000000000e98 RIP=ffffffff814c07eb RFL=00000212 [----A--] 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 00007fb7c4737900 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=00007fb7c4cee618 CR3=000000000e4ec000 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=6e69676f6c5f6d61702c78756e696c65 XMM02=755f6d61702c74696d7265705f6d6170 XMM03=2c766e655f6d61702c7374696d696c5f XMM04=6d61702c766e655f6d61702c7374696d XMM05=78696e755f6d61702c74696d7265705f XMM06=6469756e69676f6c5f6d61702c78756e XMM07=672065736f6c635f6e6f69737365733a XMM08=61662029286e65706f5f746964756100 XMM09=00000000000000000000000000000000 XMM10=00000000000000000000000000000000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000