syzkaller login: [ 63.994829] BUG: Bad rss-counter state mm:00000000c80217ed type:MM_FILEPAGES val:33 [ 63.996086] BUG: Bad rss-counter state mm:00000000c80217ed type:MM_ANONPAGES val:22 [ 64.040561] ================================================================== [ 64.041591] BUG: KASAN: slab-use-after-free in vma_interval_tree_remove+0xc75/0xec0 [ 64.042715] Read of size 8 at addr ffff888019d16d08 by task sshd/228 [ 64.043560] [ 64.043808] CPU: 0 PID: 228 Comm: sshd Not tainted 6.4.0-rc7-next-20230620 #1 [ 64.044794] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS 1.12.0-1 04/01/2014 [ 64.045886] Call Trace: [ 64.046256] [ 64.046569] dump_stack_lvl+0x91/0xf0 [ 64.047123] print_report+0xcc/0x620 [ 64.047657] ? __virt_addr_valid+0x102/0x340 [ 64.048279] ? vma_interval_tree_remove+0xc75/0xec0 [ 64.048984] ? vma_interval_tree_remove+0xc75/0xec0 [ 64.049693] kasan_report+0xbe/0xf0 [ 64.050254] ? vma_interval_tree_remove+0xc75/0xec0 [ 64.050963] vma_interval_tree_remove+0xc75/0xec0 [ 64.051651] vma_prepare+0xc54/0x11a0 [ 64.052196] __split_vma+0x5af/0x950 [ 64.052739] ? __pfx___split_vma+0x10/0x10 [ 64.053349] ? find_held_lock+0x2c/0x110 [ 64.053953] do_vmi_align_munmap+0x2ba/0x11f0 [ 64.054623] ? lock_is_held_type+0x9f/0x120 [ 64.055242] ? __pfx_do_vmi_align_munmap+0x10/0x10 [ 64.055938] ? mtree_range_walk+0x632/0x900 [ 64.056563] ? mas_walk+0x5c7/0x7c0 [ 64.057114] do_vmi_munmap+0x1f1/0x2b0 [ 64.057688] mmap_region+0x1f9/0x2660 [ 64.058253] ? vm_mmap_pgoff+0x15c/0x3a0 [ 64.058840] ? __pfx_arch_get_unmapped_area_topdown+0x10/0x10 [ 64.059653] ? __pfx_lock_acquire+0x10/0x10 [ 64.060270] ? __pfx_mmap_region+0x10/0x10 [ 64.060878] ? security_mmap_addr+0x7d/0xa0 [ 64.061502] ? get_unmapped_area+0x1f5/0x3f0 [ 64.062137] do_mmap+0x854/0xf00 [ 64.062665] vm_mmap_pgoff+0x1a6/0x3a0 [ 64.063231] ? __pfx_vm_mmap_pgoff+0x10/0x10 [ 64.063887] ksys_mmap_pgoff+0x3af/0x500 [ 64.064474] do_syscall_64+0x3f/0x90 [ 64.065030] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 64.065771] RIP: 0033:0x7f8a8d8c1d82 [ 64.066324] 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 [ 64.068915] RSP: 002b:00007fff44836ca8 EFLAGS: 00000206 ORIG_RAX: 0000000000000009 [ 64.069983] RAX: ffffffffffffffda RBX: 0000000000000812 RCX: 00007f8a8d8c1d82 [ 64.070985] RDX: 0000000000000005 RSI: 0000000000001000 RDI: 00007f8a8ccfb000 [ 64.071976] RBP: 00007f8a8ccfb000 R08: 0000000000000009 R09: 0000000000001000 [ 64.072939] R10: 0000000000000812 R11: 0000000000000206 R12: 0000562e4ae5fec0 [ 64.073878] R13: 00007fff44836cc0 R14: 00007fff44836cf0 R15: 00007fff44837050 [ 64.074860] [ 64.075176] [ 64.075420] Allocated by task 221: [ 64.075897] kasan_save_stack+0x22/0x50 [ 64.076486] kasan_set_track+0x25/0x30 [ 64.077033] __kasan_slab_alloc+0x59/0x70 [ 64.077612] kmem_cache_alloc+0x16b/0x370 [ 64.078197] vm_area_dup+0x20/0x160 [ 64.078706] __split_vma+0x170/0x950 [ 64.079223] split_vma+0xc6/0x110 [ 64.079706] mprotect_fixup+0x8d2/0xb30 [ 64.080261] do_mprotect_pkey+0x87e/0xd40 [ 64.080823] __x64_sys_mprotect+0x78/0xc0 [ 64.081402] do_syscall_64+0x3f/0x90 [ 64.081938] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 64.082682] [ 64.082931] Freed by task 221: [ 64.083385] kasan_save_stack+0x22/0x50 [ 64.083947] kasan_set_track+0x25/0x30 [ 64.084513] kasan_save_free_info+0x2b/0x50 [ 64.085090] __kasan_slab_free+0x10a/0x190 [ 64.085682] kmem_cache_free+0x10d/0x4d0 [ 64.086259] rcu_core+0x8c8/0x2860 [ 64.086745] __do_softirq+0x1b7/0x7d4 [ 64.087268] [ 64.087500] Last potentially related work creation: [ 64.088139] kasan_save_stack+0x22/0x50 [ 64.088702] __kasan_record_aux_stack+0x8e/0xa0 [ 64.089350] __call_rcu_common.constprop.0+0x6a/0xb90 [ 64.090070] remove_vma+0x139/0x170 [ 64.090586] do_vmi_align_munmap+0xd4a/0x11f0 [ 64.091212] do_vmi_munmap+0x1f1/0x2b0 [ 64.091737] __vm_munmap+0x138/0x3a0 [ 64.092242] __x64_sys_munmap+0x59/0x80 [ 64.092769] do_syscall_64+0x3f/0x90 [ 64.093279] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 64.093968] [ 64.094231] The buggy address belongs to the object at ffff888019d16cb0 [ 64.094231] which belongs to the cache vm_area_struct of size 168 [ 64.095788] The buggy address is located 88 bytes inside of [ 64.095788] freed 168-byte region [ffff888019d16cb0, ffff888019d16d58) [ 64.097278] [ 64.097509] The buggy address belongs to the physical page: [ 64.098240] page:00000000d575c8e0 refcount:1 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0x19d16 [ 64.099417] memcg:ffff8880181a4d01 [ 64.099877] flags: 0x100000000000200(slab|node=0|zone=1) [ 64.100561] page_type: 0xffffffff() [ 64.101041] raw: 0100000000000200 ffff8880087a0c80 dead000000000122 0000000000000000 [ 64.102022] raw: 0000000000000000 0000000000110011 00000001ffffffff ffff8880181a4d01 [ 64.102999] page dumped because: kasan: bad access detected [ 64.103708] [ 64.103940] Memory state around the buggy address: [ 64.104565] ffff888019d16c00: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 fc fc [ 64.105489] ffff888019d16c80: fc fc fc fc fc fc fa fb fb fb fb fb fb fb fb fb [ 64.106427] >ffff888019d16d00: fb fb fb fb fb fb fb fb fb fb fb fc fc fc fc fc [ 64.107334] ^ [ 64.107806] ffff888019d16d80: fc fc fc fa fb fb fb fb fb fb fb fb fb fb fb fb [ 64.108727] ffff888019d16e00: fb fb fb fb fb fb fb fb fc fc fc fc fc fc fc fc [ 64.109631] ================================================================== [ 64.110759] Disabling lock debugging due to kernel taint [ 66.380369] BUG: Bad rss-counter state mm:000000002d577adb type:MM_FILEPAGES val:33 [ 66.381769] BUG: Bad rss-counter state mm:000000002d577adb type:MM_ANONPAGES val:22 [ 66.823094] BUG: Bad rss-counter state mm:00000000626d10de type:MM_FILEPAGES val:33 [ 66.824735] BUG: Bad rss-counter state mm:00000000626d10de type:MM_ANONPAGES val:22 Warning: Permanently added '[localhost]:9305' (ECDSA) to the list of known hosts. 2023/06/21 05:51:44 fuzzer started 2023/06/21 05:51:44 dialing manager at localhost:36067 2023/06/21 05:51:44 checking machine... 2023/06/21 05:51:44 checking revisions... [ 67.540994] kmemleak: Automatic memory scanning thread ended 2023/06/21 05:51:44 testing simple program... [ 67.593476] cgroup: Unknown subsys name 'net' [ 67.646129] cgroup: Unknown subsys name 'rlimit' executing program executing program executing program VM DIAGNOSIS: 05:51:44 Registers: info registers vcpu 0 RAX=ffffea0000598e00 RBX=ffff888016638ab0 RCX=ffff88800844f780 RDX=ffff888096638ab0 RSI=ffff888016ddc130 RDI=ffff88800844f780 RBP=0000000000000000 RSP=ffff888014737808 R8 =ffff888016638ab0 R9 =0000000000000000 R10=ffffea00005b7700 R11=00000000800d0009 R12=dffffc0000000000 R13=ffff888014737848 R14=0000000000000000 R15=ffff888016ddc130 RIP=ffffffff81810393 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 =0000 0000000000000000 00000000 00000000 DS =0000 0000000000000000 00000000 00000000 FS =0000 00007ffaf11dd900 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=00007ffaf062fb00 CR3=000000000c934000 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=454d49544c4145525f454352554f535f XMM01=3d504d415453454d49545f454d49544c XMM02=ffffffffffffffffffffffffffffffff XMM03=2f6c616e72756f6a2f676f6c2f6e7572 XMM04=60a7a0434be1978e00000000000ae988 XMM05=260659353d6b2d4f00000000001326a8 XMM06=1a58cb52dc18f6d700000000001314a0 XMM07=00000000000000000000000000000000 XMM08=415453454d49545f454d49544c414552 XMM09=00000000000000000000000000000000 XMM10=20200000000020202020202020200000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000 info registers vcpu 1 RAX=0000000000000000 RBX=0000000000000000 RCX=0000000000000000 RDX=ffff8880103b51c0 RSI=ffffffff814c857a RDI=0000000000000005 RBP=0000000000000000 RSP=ffff88800f607480 R8 =0000000000000005 R9 =0000000000000000 R10=0000000000000000 R11=00000000000b6a61 R12=0000000000000000 R13=0000000000000000 R14=ffffffff85652c08 R15=0000000000000200 RIP=ffffffff813744b0 RFL=00000293 [--S-A-C] 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 00007fe02dbc5900 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=00007fe02e17a650 CR3=000000000c786000 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=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