syzkaller login: [ 30.664404] BUG: Bad rss-counter state mm:00000000c6c5c385 type:MM_FILEPAGES val:33 [ 30.665663] BUG: Bad rss-counter state mm:00000000c6c5c385 type:MM_ANONPAGES val:22 [ 30.710391] ================================================================== [ 30.711346] BUG: KASAN: slab-use-after-free in vma_interval_tree_remove+0xc75/0xec0 [ 30.712325] Read of size 8 at addr ffff8880167324e0 by task sshd/220 [ 30.713132] [ 30.713353] CPU: 0 PID: 220 Comm: sshd Not tainted 6.4.0-rc7-next-20230620 #1 [ 30.714290] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS 1.12.0-1 04/01/2014 [ 30.715310] Call Trace: [ 30.715638] [ 30.715932] dump_stack_lvl+0x91/0xf0 [ 30.716441] print_report+0xcc/0x620 [ 30.716939] ? __virt_addr_valid+0x102/0x340 [ 30.717512] ? vma_interval_tree_remove+0xc75/0xec0 [ 30.718165] ? vma_interval_tree_remove+0xc75/0xec0 [ 30.718802] kasan_report+0xbe/0xf0 [ 30.719293] ? vma_interval_tree_remove+0xc75/0xec0 [ 30.719942] vma_interval_tree_remove+0xc75/0xec0 [ 30.720570] vma_prepare+0xc54/0x11a0 [ 30.721234] __split_vma+0x5af/0x950 [ 30.721734] ? __pfx___split_vma+0x10/0x10 [ 30.722311] ? find_held_lock+0x2c/0x110 [ 30.722849] do_vmi_align_munmap+0x2ba/0x11f0 [ 30.723448] ? lock_is_held_type+0x9f/0x120 [ 30.724001] ? __pfx_do_vmi_align_munmap+0x10/0x10 [ 30.724628] ? mtree_range_walk+0x632/0x900 [ 30.725198] ? mas_walk+0x5c7/0x7c0 [ 30.725690] do_vmi_munmap+0x1f1/0x2b0 [ 30.726226] mmap_region+0x1f9/0x2660 [ 30.726728] ? vm_mmap_pgoff+0x15c/0x3a0 [ 30.727264] ? __pfx_arch_get_unmapped_area_topdown+0x10/0x10 [ 30.727999] ? __pfx_lock_acquire+0x10/0x10 [ 30.728557] ? __pfx_mmap_region+0x10/0x10 [ 30.729117] ? security_mmap_addr+0x7d/0xa0 [ 30.729666] ? get_unmapped_area+0x1f5/0x3f0 [ 30.730239] do_mmap+0x854/0xf00 [ 30.730693] vm_mmap_pgoff+0x1a6/0x3a0 [ 30.731211] ? __pfx_vm_mmap_pgoff+0x10/0x10 [ 30.731794] ksys_mmap_pgoff+0x3af/0x500 [ 30.732328] do_syscall_64+0x3f/0x90 [ 30.732806] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 30.733457] RIP: 0033:0x7f981b100d82 [ 30.733917] 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 [ 30.736061] RSP: 002b:00007ffdd34af808 EFLAGS: 00000206 ORIG_RAX: 0000000000000009 [ 30.736912] RAX: ffffffffffffffda RBX: 0000000000000812 RCX: 00007f981b100d82 [ 30.737704] RDX: 0000000000000005 RSI: 0000000000001000 RDI: 00007f981a53a000 [ 30.738515] RBP: 00007f981a53a000 R08: 0000000000000009 R09: 0000000000001000 [ 30.739309] R10: 0000000000000812 R11: 0000000000000206 R12: 0000563e542eaec0 [ 30.740102] R13: 00007ffdd34af820 R14: 00007ffdd34af850 R15: 00007ffdd34afbb0 [ 30.740919] [ 30.741193] [ 30.741397] Allocated by task 213: [ 30.741801] kasan_save_stack+0x22/0x50 [ 30.742311] kasan_set_track+0x25/0x30 [ 30.742791] __kasan_slab_alloc+0x59/0x70 [ 30.743309] kmem_cache_alloc+0x16b/0x370 [ 30.743809] vm_area_dup+0x20/0x160 [ 30.744256] __split_vma+0x170/0x950 [ 30.744712] split_vma+0xc6/0x110 [ 30.745166] mprotect_fixup+0x8d2/0xb30 [ 30.745712] do_mprotect_pkey+0x87e/0xd40 [ 30.746294] __x64_sys_mprotect+0x78/0xc0 [ 30.746842] do_syscall_64+0x3f/0x90 [ 30.747343] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 30.748016] [ 30.748241] Freed by task 213: [ 30.748646] kasan_save_stack+0x22/0x50 [ 30.749162] kasan_set_track+0x25/0x30 [ 30.749682] kasan_save_free_info+0x2b/0x50 [ 30.750255] __kasan_slab_free+0x10a/0x190 [ 30.750813] kmem_cache_free+0x10d/0x4d0 [ 30.751342] rcu_core+0x8c8/0x2860 [ 30.751798] __do_softirq+0x1b7/0x7d4 [ 30.752292] [ 30.752517] Last potentially related work creation: [ 30.753132] kasan_save_stack+0x22/0x50 [ 30.753666] __kasan_record_aux_stack+0x8e/0xa0 [ 30.754263] __call_rcu_common.constprop.0+0x6a/0xb90 [ 30.754912] remove_vma+0x139/0x170 [ 30.755369] do_vmi_align_munmap+0xd4a/0x11f0 [ 30.755965] do_vmi_munmap+0x1f1/0x2b0 [ 30.756464] __vm_munmap+0x138/0x3a0 [ 30.756935] __x64_sys_munmap+0x59/0x80 [ 30.757446] do_syscall_64+0x3f/0x90 [ 30.757921] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 30.758577] [ 30.758804] The buggy address belongs to the object at ffff888016732488 [ 30.758804] which belongs to the cache vm_area_struct of size 168 [ 30.760335] The buggy address is located 88 bytes inside of [ 30.760335] freed 168-byte region [ffff888016732488, ffff888016732530) [ 30.761801] [ 30.762022] The buggy address belongs to the physical page: [ 30.762745] page:000000002043dba2 refcount:1 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0x16732 [ 30.763887] memcg:ffff888018321701 [ 30.764328] flags: 0x100000000000200(slab|node=0|zone=1) [ 30.765023] page_type: 0xffffffff() [ 30.765501] raw: 0100000000000200 ffff8880087a0c80 dead000000000122 0000000000000000 [ 30.766472] raw: 0000000000000000 0000000000110011 00000001ffffffff ffff888018321701 [ 30.767443] page dumped because: kasan: bad access detected [ 30.768145] [ 30.768366] Memory state around the buggy address: [ 30.768968] ffff888016732380: fc fc fc fc 00 00 00 00 00 00 00 00 00 00 00 00 [ 30.769826] ffff888016732400: 00 00 00 00 00 00 00 00 00 fc fc fc fc fc fc fc [ 30.770707] >ffff888016732480: fc fa fb fb fb fb fb fb fb fb fb fb fb fb fb fb [ 30.771578] ^ [ 30.772351] ffff888016732500: fb fb fb fb fb fb fc fc fc fc fc fc fc fc fa fb [ 30.773214] ffff888016732580: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb [ 30.774110] ================================================================== [ 30.775302] Disabling lock debugging due to kernel taint [ 32.617475] BUG: Bad rss-counter state mm:000000006fea051a type:MM_FILEPAGES val:33 [ 32.618198] BUG: Bad rss-counter state mm:000000006fea051a type:MM_ANONPAGES val:22 [ 33.074174] BUG: Bad rss-counter state mm:0000000011b06165 type:MM_FILEPAGES val:33 [ 33.075237] BUG: Bad rss-counter state mm:0000000011b06165 type:MM_ANONPAGES val:22 Warning: Permanently added '[localhost]:6955' (ECDSA) to the list of known hosts. 2023/06/21 10:29:13 fuzzer started 2023/06/21 10:29:13 dialing manager at localhost:36067 2023/06/21 10:29:13 checking machine... 2023/06/21 10:29:13 checking revisions... [ 33.832663] kmemleak: Automatic memory scanning thread ended 2023/06/21 10:29:13 testing simple program... [ 33.870381] cgroup: Unknown subsys name 'net' [ 33.915984] cgroup: Unknown subsys name 'rlimit' executing program executing program executing program VM DIAGNOSIS: 10:29:13 Registers: info registers vcpu 0 RAX=ffff88800d824b80 RBX=ffff88800d716ea8 RCX=1ffff11001a5f086 RDX=dffffc0000000000 RSI=ffff88800dfdebd0 RDI=ffff88800d716ed8 RBP=ffff88800d2f8400 RSP=ffff888016f17a28 R8 =0000000000000001 R9 =0000000000000246 R10=0000000000000003 R11=00000000000b6a61 R12=ffff88800dfdea00 R13=0000000000000000 R14=ffff88800a0523d8 R15=ffff88800a052390 RIP=ffffffff81847688 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 00007fc1290b9900 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=00007fc1296710b0 CR3=0000000016b06000 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=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=00007ffd6a50c3b8 CR3=000000000de0a000 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=2032313a39323a3031203132206e754a XMM01=73732878696e755f6d6170203a5d3033 XMM02=65736f6c63206e6f6973736573203a29 XMM03=755f6d6170203a5d3033325b64687373 XMM04=69662068637573206f4e203a656c6163 XMM05=3a656c696620766e65206e65706f206f XMM06=65733a6468737328766e655f6d617020 XMM07=6b7a79732032313a39323a3031203132 XMM08=69767265733d7373616c63742030733a XMM09=00000000000000000000000000000000 XMM10=00000000000000000000000000000000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000