syzkaller login: [ 30.478817] BUG: Bad rss-counter state mm:00000000dacf8da5 type:MM_FILEPAGES val:33 [ 30.479882] BUG: Bad rss-counter state mm:00000000dacf8da5 type:MM_ANONPAGES val:22 [ 30.643099] ================================================================== [ 30.644015] BUG: KASAN: slab-use-after-free in vma_interval_tree_remove+0xc75/0xec0 [ 30.644956] Read of size 8 at addr ffff88800e2ea228 by task sshd/220 [ 30.645804] [ 30.646023] CPU: 0 PID: 220 Comm: sshd Not tainted 6.4.0-rc7-next-20230620 #1 [ 30.646902] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS 1.12.0-1 04/01/2014 [ 30.647899] Call Trace: [ 30.648222] [ 30.648513] dump_stack_lvl+0x91/0xf0 [ 30.648998] print_report+0xcc/0x620 [ 30.649473] ? __virt_addr_valid+0x102/0x340 [ 30.650025] ? vma_interval_tree_remove+0xc75/0xec0 [ 30.650636] ? vma_interval_tree_remove+0xc75/0xec0 [ 30.651244] kasan_report+0xbe/0xf0 [ 30.651713] ? vma_interval_tree_remove+0xc75/0xec0 [ 30.652328] vma_interval_tree_remove+0xc75/0xec0 [ 30.652923] vma_prepare+0xc54/0x11a0 [ 30.653403] __split_vma+0x5af/0x950 [ 30.653878] ? __pfx___split_vma+0x10/0x10 [ 30.654410] ? find_held_lock+0x2c/0x110 [ 30.654948] do_vmi_align_munmap+0x2ba/0x11f0 [ 30.655510] ? lock_is_held_type+0x9f/0x120 [ 30.656044] ? __pfx_do_vmi_align_munmap+0x10/0x10 [ 30.656650] ? mtree_range_walk+0x632/0x900 [ 30.657207] ? mas_walk+0x5c7/0x7c0 [ 30.657705] do_vmi_munmap+0x1f1/0x2b0 [ 30.658200] mmap_region+0x1f9/0x2660 [ 30.658678] ? vm_mmap_pgoff+0x15c/0x3a0 [ 30.659184] ? __pfx_arch_get_unmapped_area_topdown+0x10/0x10 [ 30.659898] ? __pfx_lock_acquire+0x10/0x10 [ 30.660431] ? __pfx_mmap_region+0x10/0x10 [ 30.660966] ? security_mmap_addr+0x7d/0xa0 [ 30.661491] ? get_unmapped_area+0x1f5/0x3f0 [ 30.662055] do_mmap+0x854/0xf00 [ 30.662494] vm_mmap_pgoff+0x1a6/0x3a0 [ 30.662983] ? __pfx_vm_mmap_pgoff+0x10/0x10 [ 30.663551] ksys_mmap_pgoff+0x3af/0x500 [ 30.664062] do_syscall_64+0x3f/0x90 [ 30.664586] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 30.665232] RIP: 0033:0x7ff950149d82 [ 30.665700] 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 [ 30.667850] RSP: 002b:00007ffd2d75d268 EFLAGS: 00000206 ORIG_RAX: 0000000000000009 [ 30.668758] RAX: ffffffffffffffda RBX: 0000000000000812 RCX: 00007ff950149d82 [ 30.669623] RDX: 0000000000000005 RSI: 0000000000001000 RDI: 00007ff94f583000 [ 30.670492] RBP: 00007ff94f583000 R08: 0000000000000009 R09: 0000000000001000 [ 30.671338] R10: 0000000000000812 R11: 0000000000000206 R12: 0000555d63d43ec0 [ 30.672183] R13: 00007ffd2d75d280 R14: 00007ffd2d75d2b0 R15: 00007ffd2d75d610 [ 30.673049] [ 30.673351] [ 30.673575] Allocated by task 213: [ 30.673999] kasan_save_stack+0x22/0x50 [ 30.674501] kasan_set_track+0x25/0x30 [ 30.674993] __kasan_slab_alloc+0x59/0x70 [ 30.675528] kmem_cache_alloc+0x16b/0x370 [ 30.676047] vm_area_dup+0x20/0x160 [ 30.676502] __split_vma+0x170/0x950 [ 30.676963] split_vma+0xc6/0x110 [ 30.677399] mprotect_fixup+0x8d2/0xb30 [ 30.677906] do_mprotect_pkey+0x87e/0xd40 [ 30.678426] __x64_sys_mprotect+0x78/0xc0 [ 30.678944] do_syscall_64+0x3f/0x90 [ 30.679417] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 30.680060] [ 30.680272] Freed by task 13: [ 30.680653] kasan_save_stack+0x22/0x50 [ 30.681174] kasan_set_track+0x25/0x30 [ 30.681723] kasan_save_free_info+0x2b/0x50 [ 30.682256] __kasan_slab_free+0x10a/0x190 [ 30.682789] kmem_cache_free+0x10d/0x4d0 [ 30.683291] rcu_core+0x8c8/0x2860 [ 30.683730] __do_softirq+0x1b7/0x7d4 [ 30.684205] [ 30.684420] Last potentially related work creation: [ 30.685007] kasan_save_stack+0x22/0x50 [ 30.685503] __kasan_record_aux_stack+0x8e/0xa0 [ 30.686084] __call_rcu_common.constprop.0+0x6a/0xb90 [ 30.686726] remove_vma+0x139/0x170 [ 30.687174] do_vmi_align_munmap+0xd4a/0x11f0 [ 30.687730] do_vmi_munmap+0x1f1/0x2b0 [ 30.688211] __vm_munmap+0x138/0x3a0 [ 30.688686] __x64_sys_munmap+0x59/0x80 [ 30.689175] do_syscall_64+0x3f/0x90 [ 30.689669] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 30.690311] [ 30.690524] Second to last potentially related work creation: [ 30.691207] kasan_save_stack+0x22/0x50 [ 30.691709] __kasan_record_aux_stack+0x8e/0xa0 [ 30.692279] __call_rcu_common.constprop.0+0x6a/0xb90 [ 30.692923] remove_vma+0x139/0x170 [ 30.693374] do_vmi_align_munmap+0xd4a/0x11f0 [ 30.693942] do_vmi_munmap+0x1f1/0x2b0 [ 30.694426] mmap_region+0x1f9/0x2660 [ 30.694907] do_mmap+0x854/0xf00 [ 30.695338] vm_mmap_pgoff+0x1a6/0x3a0 [ 30.695824] ksys_mmap_pgoff+0x3af/0x500 [ 30.696324] do_syscall_64+0x3f/0x90 [ 30.696797] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 30.697438] [ 30.697661] The buggy address belongs to the object at ffff88800e2ea1d0 [ 30.697661] which belongs to the cache vm_area_struct of size 168 [ 30.699113] The buggy address is located 88 bytes inside of [ 30.699113] freed 168-byte region [ffff88800e2ea1d0, ffff88800e2ea278) [ 30.700510] [ 30.700724] The buggy address belongs to the physical page: [ 30.701389] page:00000000eb6b439a refcount:1 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0xe2ea [ 30.702486] memcg:ffff88800d889e01 [ 30.702909] flags: 0x100000000000200(slab|node=0|zone=1) [ 30.703555] page_type: 0xffffffff() [ 30.704006] raw: 0100000000000200 ffff8880087a0c80 ffffea000037f5c0 dead000000000006 [ 30.704918] raw: 0000000000000000 0000000000110011 00000001ffffffff ffff88800d889e01 [ 30.705825] page dumped because: kasan: bad access detected [ 30.706486] [ 30.706700] Memory state around the buggy address: [ 30.707277] ffff88800e2ea100: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 [ 30.708125] ffff88800e2ea180: 00 00 fc fc fc fc fc fc fc fc fa fb fb fb fb fb [ 30.708980] >ffff88800e2ea200: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fc [ 30.709951] ^ [ 30.710646] ffff88800e2ea280: fc fc fc fc fc fc fc 00 00 00 00 00 00 00 00 00 [ 30.711693] ffff88800e2ea300: 00 00 00 00 00 00 00 00 00 00 00 00 fc fc fc fc [ 30.712720] ================================================================== [ 30.714031] Disabling lock debugging due to kernel taint [ 32.606991] BUG: Bad rss-counter state mm:0000000061deb113 type:MM_FILEPAGES val:33 [ 32.607975] BUG: Bad rss-counter state mm:0000000061deb113 type:MM_ANONPAGES val:22 [ 33.098798] BUG: Bad rss-counter state mm:00000000ace6cc32 type:MM_FILEPAGES val:33 [ 33.099834] BUG: Bad rss-counter state mm:00000000ace6cc32 type:MM_ANONPAGES val:22 Warning: Permanently added '[localhost]:37346' (ECDSA) to the list of known hosts. 2023/06/21 01:18:28 fuzzer started 2023/06/21 01:18:28 dialing manager at localhost:36067 2023/06/21 01:18:28 checking machine... 2023/06/21 01:18:28 checking revisions... [ 33.832779] kmemleak: Automatic memory scanning thread ended 2023/06/21 01:18:28 testing simple program... [ 33.869305] cgroup: Unknown subsys name 'net' [ 33.926767] cgroup: Unknown subsys name 'rlimit' executing program executing program executing program VM DIAGNOSIS: 01:18:28 Registers: info registers vcpu 0 RAX=ffffffff84537da7 RBX=ffffffff813ad470 RCX=0000000000000001 RDX=1ffff1100d9c135e RSI=ffffffff84537da7 RDI=ffff88806ce09b60 RBP=ffff88806ce09b30 RSP=ffff88806ce09a90 R8 =0000000000000001 R9 =ffff88806ce09ad8 R10=0000000000038001 R11=000000000000fdcc R12=ffff88806ce09b60 R13=0000000000000000 R14=ffff88800f1eb680 R15=ffff88800df62670 RIP=ffffffff813ad474 RFL=00000282 [--S----] 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 00007ff5caa3b900 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=00007ff5caff30b0 CR3=0000000014684000 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=ffff888008c04400 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=00007faf0553f6e0 CR3=0000000008cc2000 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=2037323a38313a3130203132206e754a XMM01=73732878696e755f6d6170203a5d3932 XMM02=65736f6c63206e6f6973736573203a29 XMM03=755f6d6170203a5d3932325b64687373 XMM04=69662068637573206f4e203a656c6163 XMM05=3a656c696620766e65206e65706f206f XMM06=65733a6468737328766e655f6d617020 XMM07=6b7a79732037323a38313a3130203132 XMM08=3d656e696c646d632022656369767265 XMM09=00000000000000000000000000000000 XMM10=00000000000000000000000000000000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000