syzkaller login: [ 38.755414] BUG: Bad rss-counter state mm:000000008072e3f0 type:MM_FILEPAGES val:33 [ 38.757047] BUG: Bad rss-counter state mm:000000008072e3f0 type:MM_ANONPAGES val:22 [ 38.925368] ================================================================== [ 38.926447] BUG: KASAN: slab-use-after-free in vma_interval_tree_remove+0xc75/0xec0 [ 38.927580] Read of size 8 at addr ffff88800e00a228 by task sshd/220 [ 38.928550] [ 38.928770] CPU: 0 PID: 220 Comm: sshd Not tainted 6.4.0-rc7-next-20230620 #1 [ 38.929634] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS 1.12.0-1 04/01/2014 [ 38.930633] Call Trace: [ 38.930949] [ 38.931232] dump_stack_lvl+0x91/0xf0 [ 38.931725] print_report+0xcc/0x620 [ 38.932203] ? __virt_addr_valid+0x102/0x340 [ 38.932754] ? vma_interval_tree_remove+0xc75/0xec0 [ 38.933379] ? vma_interval_tree_remove+0xc75/0xec0 [ 38.933992] kasan_report+0xbe/0xf0 [ 38.934469] ? vma_interval_tree_remove+0xc75/0xec0 [ 38.935099] vma_interval_tree_remove+0xc75/0xec0 [ 38.935699] vma_prepare+0xc54/0x11a0 [ 38.936180] __split_vma+0x5af/0x950 [ 38.936651] ? __pfx___split_vma+0x10/0x10 [ 38.937186] ? find_held_lock+0x2c/0x110 [ 38.937707] do_vmi_align_munmap+0x2ba/0x11f0 [ 38.938281] ? lock_is_held_type+0x9f/0x120 [ 38.938844] ? __pfx_do_vmi_align_munmap+0x10/0x10 [ 38.939458] ? mtree_range_walk+0x632/0x900 [ 38.940012] ? mas_walk+0x5c7/0x7c0 [ 38.940491] do_vmi_munmap+0x1f1/0x2b0 [ 38.940985] mmap_region+0x1f9/0x2660 [ 38.941480] ? vm_mmap_pgoff+0x15c/0x3a0 [ 38.941987] ? __pfx_arch_get_unmapped_area_topdown+0x10/0x10 [ 38.942712] ? __pfx_lock_acquire+0x10/0x10 [ 38.943253] ? __pfx_mmap_region+0x10/0x10 [ 38.943786] ? security_mmap_addr+0x7d/0xa0 [ 38.944323] ? get_unmapped_area+0x1f5/0x3f0 [ 38.944880] do_mmap+0x854/0xf00 [ 38.945326] vm_mmap_pgoff+0x1a6/0x3a0 [ 38.945823] ? __pfx_vm_mmap_pgoff+0x10/0x10 [ 38.946393] ksys_mmap_pgoff+0x3af/0x500 [ 38.946921] do_syscall_64+0x3f/0x90 [ 38.947412] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 38.948055] RIP: 0033:0x7fb5edd89d82 [ 38.948511] 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 [ 38.950667] RSP: 002b:00007ffecca9ad38 EFLAGS: 00000206 ORIG_RAX: 0000000000000009 [ 38.951589] RAX: ffffffffffffffda RBX: 0000000000000812 RCX: 00007fb5edd89d82 [ 38.952452] RDX: 0000000000000005 RSI: 0000000000001000 RDI: 00007fb5ed1c3000 [ 38.953328] RBP: 00007fb5ed1c3000 R08: 0000000000000009 R09: 0000000000001000 [ 38.954186] R10: 0000000000000812 R11: 0000000000000206 R12: 000055996ce07b20 [ 38.955057] R13: 00007ffecca9ad50 R14: 00007ffecca9ad80 R15: 00007ffecca9b0e0 [ 38.955938] [ 38.956237] [ 38.956453] Allocated by task 213: [ 38.956884] kasan_save_stack+0x22/0x50 [ 38.957403] kasan_set_track+0x25/0x30 [ 38.957897] __kasan_slab_alloc+0x59/0x70 [ 38.958445] kmem_cache_alloc+0x16b/0x370 [ 38.959007] vm_area_dup+0x20/0x160 [ 38.959458] __split_vma+0x170/0x950 [ 38.959933] split_vma+0xc6/0x110 [ 38.960373] mprotect_fixup+0x8d2/0xb30 [ 38.960871] do_mprotect_pkey+0x87e/0xd40 [ 38.961394] __x64_sys_mprotect+0x78/0xc0 [ 38.961919] do_syscall_64+0x3f/0x90 [ 38.962400] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 38.963061] [ 38.963278] Freed by task 213: [ 38.963670] kasan_save_stack+0x22/0x50 [ 38.964180] kasan_set_track+0x25/0x30 [ 38.964672] kasan_save_free_info+0x2b/0x50 [ 38.965199] __kasan_slab_free+0x10a/0x190 [ 38.965728] kmem_cache_free+0x10d/0x4d0 [ 38.966236] rcu_core+0x8c8/0x2860 [ 38.966683] __do_softirq+0x1b7/0x7d4 [ 38.967169] [ 38.967389] Last potentially related work creation: [ 38.967978] kasan_save_stack+0x22/0x50 [ 38.968490] __kasan_record_aux_stack+0x8e/0xa0 [ 38.969069] __call_rcu_common.constprop.0+0x6a/0xb90 [ 38.969713] remove_vma+0x139/0x170 [ 38.970163] do_vmi_align_munmap+0xd4a/0x11f0 [ 38.970738] do_vmi_munmap+0x1f1/0x2b0 [ 38.971225] __vm_munmap+0x138/0x3a0 [ 38.971688] __x64_sys_munmap+0x59/0x80 [ 38.972190] do_syscall_64+0x3f/0x90 [ 38.972675] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 38.973328] [ 38.973544] Second to last potentially related work creation: [ 38.974229] kasan_save_stack+0x22/0x50 [ 38.974753] __kasan_record_aux_stack+0x8e/0xa0 [ 38.975334] __call_rcu_common.constprop.0+0x6a/0xb90 [ 38.975981] remove_vma+0x139/0x170 [ 38.976433] do_vmi_align_munmap+0xd4a/0x11f0 [ 38.976985] do_vmi_munmap+0x1f1/0x2b0 [ 38.977468] mmap_region+0x1f9/0x2660 [ 38.977941] do_mmap+0x854/0xf00 [ 38.978382] vm_mmap_pgoff+0x1a6/0x3a0 [ 38.978872] ksys_mmap_pgoff+0x3af/0x500 [ 38.979375] do_syscall_64+0x3f/0x90 [ 38.979853] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 38.980507] [ 38.980722] The buggy address belongs to the object at ffff88800e00a1d0 [ 38.980722] which belongs to the cache vm_area_struct of size 168 [ 38.982241] The buggy address is located 88 bytes inside of [ 38.982241] freed 168-byte region [ffff88800e00a1d0, ffff88800e00a278) [ 38.983690] [ 38.983913] The buggy address belongs to the physical page: [ 38.984576] page:000000009bda8f29 refcount:1 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0xe00a [ 38.985674] memcg:ffff88800d7eeb01 [ 38.986105] flags: 0x100000000000200(slab|node=0|zone=1) [ 38.986778] page_type: 0xffffffff() [ 38.987229] raw: 0100000000000200 ffff8880087a0c80 ffffea0000381f00 dead000000000006 [ 38.988179] raw: 0000000000000000 0000000000110011 00000001ffffffff ffff88800d7eeb01 [ 38.989090] page dumped because: kasan: bad access detected [ 38.989746] [ 38.989963] Memory state around the buggy address: [ 38.990550] ffff88800e00a100: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 [ 38.991421] ffff88800e00a180: 00 00 fc fc fc fc fc fc fc fc fa fb fb fb fb fb [ 38.992292] >ffff88800e00a200: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fc [ 38.993151] ^ [ 38.993717] ffff88800e00a280: fc fc fc fc fc fc fc 00 00 00 00 00 00 00 00 00 [ 38.994574] ffff88800e00a300: 00 00 00 00 00 00 00 00 00 00 00 00 fc fc fc fc [ 38.995438] ================================================================== [ 38.996426] Disabling lock debugging due to kernel taint [ 41.674804] BUG: Bad rss-counter state mm:000000008b5187e1 type:MM_FILEPAGES val:33 [ 41.675787] BUG: Bad rss-counter state mm:000000008b5187e1 type:MM_ANONPAGES val:22 [ 42.160371] BUG: Bad rss-counter state mm:00000000126e908f type:MM_FILEPAGES val:32 [ 42.161373] BUG: Bad rss-counter state mm:00000000126e908f type:MM_ANONPAGES val:22 Warning: Permanently added '[localhost]:13733' (ECDSA) to the list of known hosts. 2023/06/20 19:31:46 fuzzer started 2023/06/20 19:31:46 dialing manager at localhost:36067 2023/06/20 19:31:46 checking machine... 2023/06/20 19:31:46 checking revisions... [ 42.917918] kmemleak: Automatic memory scanning thread ended 2023/06/20 19:31:46 testing simple program... [ 42.974061] cgroup: Unknown subsys name 'net' [ 43.019918] cgroup: Unknown subsys name 'rlimit' executing program executing program executing program VM DIAGNOSIS: 19:31:46 Registers: info registers vcpu 0 RAX=1ffffffff0bc7102 RBX=ffffffff85e38814 RCX=ffffffff81c63c8b RDX=0000000000000000 RSI=ffffffff86190a80 RDI=ffffffff85e38814 RBP=ffffffff85e38814 RSP=ffff888016297400 R8 =ffffffff86190a80 R9 =ffff8880162974f8 R10=0000000000038001 R11=000000000002f794 R12=ffffffff85e38814 R13=ffffffff85e38814 R14=ffffffff85e38814 R15=dffffc0000000000 RIP=ffffffff8112fc7f RFL=00000213 [----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 00007f83ae44c700 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=00007f7108322660 CR3=000000001796a000 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=2035343a31333a3931203032206e754a XMM01=73732878696e755f6d6170203a5d3932 XMM02=65736f6c63206e6f6973736573203a29 XMM03=755f6d6170203a5d3932325b64687373 XMM04=69662068637573206f4e203a656c6163 XMM05=3a656c696620766e65206e65706f206f XMM06=65733a6468737328766e655f6d617020 XMM07=6b7a79732035343a31333a3931203032 XMM08=3d656e696c646d632022656369767265 XMM09=00000000000000000000000000000000 XMM10=00000000000000000000000000000000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000 info registers vcpu 1 RAX=ffffffff8180b229 RBX=ffffffff85dfddf4 RCX=ffffffff8180b2d4 RDX=0000000000000000 RSI=ffffffff86138b3e RDI=ffffffff85dfdde8 RBP=ffffffff85dfddf8 RSP=ffff88801ca17468 R8 =ffffffff86138b3e R9 =ffff88801ca17560 R10=0000000000038001 R11=0000000000020d09 R12=ffffffff85dfde00 R13=ffffffff85dfdde8 R14=ffffffff85dfdde8 R15=dffffc0000000000 RIP=ffffffff8112fc4f 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 00007f8e40c23900 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=00007f8e411da618 CR3=000000001694a000 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