syzkaller login: [ 30.779546] BUG: Bad rss-counter state mm:000000003cadedfd type:MM_FILEPAGES val:33 [ 30.780775] BUG: Bad rss-counter state mm:000000003cadedfd type:MM_ANONPAGES val:22 [ 30.822317] ================================================================== [ 30.823586] BUG: KASAN: slab-use-after-free in vma_interval_tree_remove+0xc75/0xec0 [ 30.824609] Read of size 8 at addr ffff888018e07a50 by task sshd/221 [ 30.825617] [ 30.825839] CPU: 1 PID: 221 Comm: sshd Not tainted 6.4.0-rc7-next-20230620 #1 [ 30.826815] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS 1.12.0-1 04/01/2014 [ 30.827944] Call Trace: [ 30.828269] [ 30.828552] dump_stack_lvl+0x91/0xf0 [ 30.829150] print_report+0xcc/0x620 [ 30.829646] ? __virt_addr_valid+0x102/0x340 [ 30.830261] ? vma_interval_tree_remove+0xc75/0xec0 [ 30.830881] ? vma_interval_tree_remove+0xc75/0xec0 [ 30.831620] kasan_report+0xbe/0xf0 [ 30.832098] ? vma_interval_tree_remove+0xc75/0xec0 [ 30.832814] vma_interval_tree_remove+0xc75/0xec0 [ 30.833543] vma_prepare+0xc54/0x11a0 [ 30.834022] __split_vma+0x5af/0x950 [ 30.834577] ? __pfx___split_vma+0x10/0x10 [ 30.835099] ? find_held_lock+0x2c/0x110 [ 30.835645] do_vmi_align_munmap+0x2ba/0x11f0 [ 30.836321] ? lock_is_held_type+0x9f/0x120 [ 30.836974] ? __pfx_do_vmi_align_munmap+0x10/0x10 [ 30.837586] ? mtree_range_walk+0x632/0x900 [ 30.838144] ? mas_walk+0x5c7/0x7c0 [ 30.838617] do_vmi_munmap+0x1f1/0x2b0 [ 30.839106] mmap_region+0x1f9/0x2660 [ 30.839597] ? vm_mmap_pgoff+0x15c/0x3a0 [ 30.840116] ? __pfx_arch_get_unmapped_area_topdown+0x10/0x10 [ 30.840826] ? __pfx_lock_acquire+0x10/0x10 [ 30.841362] ? __pfx_mmap_region+0x10/0x10 [ 30.841888] ? security_mmap_addr+0x7d/0xa0 [ 30.842419] ? get_unmapped_area+0x1f5/0x3f0 [ 30.842965] do_mmap+0x854/0xf00 [ 30.843412] vm_mmap_pgoff+0x1a6/0x3a0 [ 30.843911] ? __pfx_vm_mmap_pgoff+0x10/0x10 [ 30.844481] ksys_mmap_pgoff+0x3af/0x500 [ 30.844989] do_syscall_64+0x3f/0x90 [ 30.845495] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 30.846155] RIP: 0033:0x7f34a4dd3d82 [ 30.846611] 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 [ 30.848752] RSP: 002b:00007ffcfa14af08 EFLAGS: 00000206 ORIG_RAX: 0000000000000009 [ 30.849667] RAX: ffffffffffffffda RBX: 0000000000000812 RCX: 00007f34a4dd3d82 [ 30.850511] RDX: 0000000000000005 RSI: 0000000000001000 RDI: 00007f34a420d000 [ 30.851346] RBP: 00007f34a420d000 R08: 0000000000000009 R09: 0000000000001000 [ 30.852196] R10: 0000000000000812 R11: 0000000000000206 R12: 0000560d7ca6af70 [ 30.853037] R13: 00007ffcfa14af20 R14: 00007ffcfa14af50 R15: 00007ffcfa14b2b0 [ 30.853911] [ 30.854204] [ 30.854425] Allocated by task 214: [ 30.854849] kasan_save_stack+0x22/0x50 [ 30.855355] kasan_set_track+0x25/0x30 [ 30.855855] __kasan_slab_alloc+0x59/0x70 [ 30.856372] kmem_cache_alloc+0x16b/0x370 [ 30.856879] vm_area_dup+0x20/0x160 [ 30.857335] __split_vma+0x170/0x950 [ 30.857796] split_vma+0xc6/0x110 [ 30.858235] mprotect_fixup+0x8d2/0xb30 [ 30.858727] do_mprotect_pkey+0x87e/0xd40 [ 30.859241] __x64_sys_mprotect+0x78/0xc0 [ 30.859755] do_syscall_64+0x3f/0x90 [ 30.860226] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 30.860861] [ 30.861076] Freed by task 13: [ 30.861466] kasan_save_stack+0x22/0x50 [ 30.861963] kasan_set_track+0x25/0x30 [ 30.862454] kasan_save_free_info+0x2b/0x50 [ 30.862983] __kasan_slab_free+0x10a/0x190 [ 30.863504] kmem_cache_free+0x10d/0x4d0 [ 30.864011] rcu_core+0x8c8/0x2860 [ 30.864452] __do_softirq+0x1b7/0x7d4 [ 30.864924] [ 30.865152] Last potentially related work creation: [ 30.865727] kasan_save_stack+0x22/0x50 [ 30.866316] __kasan_record_aux_stack+0x8e/0xa0 [ 30.866885] __call_rcu_common.constprop.0+0x6a/0xb90 [ 30.867522] remove_vma+0x139/0x170 [ 30.867970] do_vmi_align_munmap+0xd4a/0x11f0 [ 30.868519] do_vmi_munmap+0x1f1/0x2b0 [ 30.869003] __vm_munmap+0x138/0x3a0 [ 30.869483] __x64_sys_munmap+0x59/0x80 [ 30.869977] do_syscall_64+0x3f/0x90 [ 30.870459] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 30.871103] [ 30.871319] The buggy address belongs to the object at ffff888018e079f8 [ 30.871319] which belongs to the cache vm_area_struct of size 168 [ 30.872766] The buggy address is located 88 bytes inside of [ 30.872766] freed 168-byte region [ffff888018e079f8, ffff888018e07aa0) [ 30.874160] [ 30.874380] The buggy address belongs to the physical page: [ 30.875034] page:0000000098298b93 refcount:1 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0x18e07 [ 30.876108] memcg:ffff88800ebf1301 [ 30.876532] flags: 0x100000000000200(slab|node=0|zone=1) [ 30.877183] page_type: 0xffffffff() [ 30.877627] raw: 0100000000000200 ffff8880087a0c80 dead000000000122 0000000000000000 [ 30.878535] raw: 0000000000000000 0000000000110011 00000001ffffffff ffff88800ebf1301 [ 30.879432] page dumped because: kasan: bad access detected [ 30.880091] [ 30.880305] Memory state around the buggy address: [ 30.880881] ffff888018e07900: fc fc 00 00 00 00 00 00 00 00 00 00 00 00 00 00 [ 30.881736] ffff888018e07980: 00 00 00 00 00 00 00 fc fc fc fc fc fc fc fc fa [ 30.882579] >ffff888018e07a00: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb [ 30.883418] ^ [ 30.884106] ffff888018e07a80: fb fb fb fb fc fc fc fc fc fc fc fc fa fb fb fb [ 30.884951] ffff888018e07b00: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb [ 30.885818] ================================================================== [ 30.886821] Disabling lock debugging due to kernel taint [ 33.516511] BUG: Bad rss-counter state mm:000000008487d8d5 type:MM_FILEPAGES val:33 [ 33.517325] BUG: Bad rss-counter state mm:000000008487d8d5 type:MM_ANONPAGES val:22 [ 33.958327] BUG: Bad rss-counter state mm:0000000067109494 type:MM_FILEPAGES val:33 [ 33.959397] BUG: Bad rss-counter state mm:0000000067109494 type:MM_ANONPAGES val:22 Warning: Permanently added '[localhost]:41050' (ECDSA) to the list of known hosts. 2023/06/20 23:02:33 fuzzer started 2023/06/20 23:02:33 dialing manager at localhost:36067 2023/06/20 23:02:33 checking machine... 2023/06/20 23:02:33 checking revisions... [ 34.685856] kmemleak: Automatic memory scanning thread ended 2023/06/20 23:02:33 testing simple program... [ 34.730709] cgroup: Unknown subsys name 'net' [ 34.768212] cgroup: Unknown subsys name 'rlimit' executing program executing program executing program VM DIAGNOSIS: 23:02:33 Registers: info registers vcpu 0 RAX=0000000080000100 RBX=0000000000000002 RCX=0000000000000100 RDX=1ffff11001dfe96b RSI=ffffffff8186b790 RDI=ffff88800eff4b58 RBP=ffff88800eff4a00 RSP=ffff88806ce09e40 R8 =0000000000000000 R9 =fffffbfff0ba7a6a R10=ffffffff85d3d357 R11=00000000000b6a61 R12=ffff88800c5e7600 R13=ffff88806ce09ee8 R14=ffff88806ce35000 R15=ffff88800eff4a00 RIP=ffffffff814c086b 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 00007fb4b94ee900 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=00007fb4b9aa60b0 CR3=000000000da8e000 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=25252525252525252525252525252525 XMM01=000000000000000000000000000000ff XMM02=000000000000000000000000000000ff XMM03=5320444f4854454d5f54505952434e45 XMM04=40404040404040404040404040404040 XMM05=5a5a5a5a5a5a5a5a5a5a5a5a5a5a5a5a XMM06=20202020202020202020202020202020 XMM07=00000000000000000000000000000000 XMM08=662079726f6d656d20666f2074756f00 XMM09=00000000000000000000000000000000 XMM10=00000000000000000000000000000000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000 info registers vcpu 1 RAX=ffff88806cf35000 RBX=0000000000000001 RCX=ffffffff8451250e RDX=ffffed100d9e6a01 RSI=0000000000000004 RDI=ffffffff81288ac5 RBP=dffffc0000000000 RSP=ffff888008e07e70 R8 =0000000000000000 R9 =ffffed100d9e6a00 R10=ffff88806cf35003 R11=0000000000000001 R12=ffffffff85d3d350 R13=1ffff110011c0fd3 R14=0000000000000000 R15=0000000000000000 RIP=ffffffff8451349f RFL=00000246 [---Z-P-] CPL=0 II=0 A20=1 SMM=0 HLT=1 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 0000000000000000 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=00007ffc67b9ad68 CR3=000000000f52e000 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=2033333a32303a3332203032206e754a XMM01=73732878696e755f6d6170203a5d3033 XMM02=65736f6c63206e6f6973736573203a29 XMM03=755f6d6170203a5d3033325b64687373 XMM04=69662068637573206f4e203a656c6163 XMM05=3a656c696620766e65206e65706f206f XMM06=65733a6468737328766e655f6d617020 XMM07=6b7a79732032333a32303a3332203032 XMM08=3d656e696c646d632022656369767265 XMM09=00000000000000000000000000000000 XMM10=00000000000000000000000000000000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000