syzkaller login: [ 30.602934] BUG: Bad rss-counter state mm:00000000a6e5832f type:MM_FILEPAGES val:33 [ 30.604129] BUG: Bad rss-counter state mm:00000000a6e5832f type:MM_ANONPAGES val:22 [ 30.637720] ================================================================== [ 30.638738] BUG: KASAN: slab-use-after-free in vma_interval_tree_remove+0xc75/0xec0 [ 30.639835] Read of size 8 at addr ffff88800f0585c8 by task sshd/222 [ 30.640701] [ 30.640934] CPU: 1 PID: 222 Comm: sshd Not tainted 6.4.0-rc7-next-20230620 #1 [ 30.641947] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS 1.12.0-1 04/01/2014 [ 30.642989] Call Trace: [ 30.643375] [ 30.643682] dump_stack_lvl+0x91/0xf0 [ 30.644238] print_report+0xcc/0x620 [ 30.644802] ? __virt_addr_valid+0x102/0x340 [ 30.645459] ? vma_interval_tree_remove+0xc75/0xec0 [ 30.646174] ? vma_interval_tree_remove+0xc75/0xec0 [ 30.646867] kasan_report+0xbe/0xf0 [ 30.647374] ? vma_interval_tree_remove+0xc75/0xec0 [ 30.648064] vma_interval_tree_remove+0xc75/0xec0 [ 30.648763] vma_prepare+0xc54/0x11a0 [ 30.649273] __split_vma+0x5af/0x950 [ 30.649797] ? __pfx___split_vma+0x10/0x10 [ 30.650377] ? find_held_lock+0x2c/0x110 [ 30.650941] do_vmi_align_munmap+0x2ba/0x11f0 [ 30.651567] ? lock_is_held_type+0x9f/0x120 [ 30.652111] ? __pfx_do_vmi_align_munmap+0x10/0x10 [ 30.652822] ? mtree_range_walk+0x632/0x900 [ 30.653389] ? mas_walk+0x5c7/0x7c0 [ 30.653862] do_vmi_munmap+0x1f1/0x2b0 [ 30.654355] mmap_region+0x1f9/0x2660 [ 30.654843] ? vm_mmap_pgoff+0x15c/0x3a0 [ 30.655356] ? __pfx_arch_get_unmapped_area_topdown+0x10/0x10 [ 30.656064] ? __pfx_lock_acquire+0x10/0x10 [ 30.656621] ? __pfx_mmap_region+0x10/0x10 [ 30.657147] ? security_mmap_addr+0x7d/0xa0 [ 30.657686] ? get_unmapped_area+0x1f5/0x3f0 [ 30.658230] do_mmap+0x854/0xf00 [ 30.658668] vm_mmap_pgoff+0x1a6/0x3a0 [ 30.659165] ? __pfx_vm_mmap_pgoff+0x10/0x10 [ 30.659741] ksys_mmap_pgoff+0x3af/0x500 [ 30.660253] do_syscall_64+0x3f/0x90 [ 30.660735] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 30.661379] RIP: 0033:0x7f6afa6fdd82 [ 30.661841] 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 [ 30.663964] RSP: 002b:00007ffd03e001d8 EFLAGS: 00000206 ORIG_RAX: 0000000000000009 [ 30.664870] RAX: ffffffffffffffda RBX: 0000000000000812 RCX: 00007f6afa6fdd82 [ 30.665710] RDX: 0000000000000005 RSI: 0000000000001000 RDI: 00007f6af9b37000 [ 30.666551] RBP: 00007f6af9b37000 R08: 0000000000000009 R09: 0000000000001000 [ 30.667394] R10: 0000000000000812 R11: 0000000000000206 R12: 0000564eb59f6f70 [ 30.668258] R13: 00007ffd03e001f0 R14: 00007ffd03e00220 R15: 00007ffd03e00580 [ 30.669130] [ 30.669423] [ 30.669637] Allocated by task 215: [ 30.670064] kasan_save_stack+0x22/0x50 [ 30.670568] kasan_set_track+0x25/0x30 [ 30.671058] __kasan_slab_alloc+0x59/0x70 [ 30.671582] kmem_cache_alloc+0x16b/0x370 [ 30.672096] vm_area_dup+0x20/0x160 [ 30.672565] __split_vma+0x170/0x950 [ 30.673034] split_vma+0xc6/0x110 [ 30.673477] mprotect_fixup+0x8d2/0xb30 [ 30.673984] do_mprotect_pkey+0x87e/0xd40 [ 30.674500] __x64_sys_mprotect+0x78/0xc0 [ 30.675018] do_syscall_64+0x3f/0x90 [ 30.675494] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 30.676158] [ 30.676372] Freed by task 204: [ 30.676763] kasan_save_stack+0x22/0x50 [ 30.677267] kasan_set_track+0x25/0x30 [ 30.677843] kasan_save_free_info+0x2b/0x50 [ 30.678372] __kasan_slab_free+0x10a/0x190 [ 30.678905] kmem_cache_free+0x10d/0x4d0 [ 30.679418] rcu_core+0x8c8/0x2860 [ 30.679857] __do_softirq+0x1b7/0x7d4 [ 30.680344] [ 30.680561] Last potentially related work creation: [ 30.681141] kasan_save_stack+0x22/0x50 [ 30.681643] __kasan_record_aux_stack+0x8e/0xa0 [ 30.682214] __call_rcu_common.constprop.0+0x6a/0xb90 [ 30.682861] remove_vma+0x139/0x170 [ 30.683311] do_vmi_align_munmap+0xd4a/0x11f0 [ 30.683868] do_vmi_munmap+0x1f1/0x2b0 [ 30.684373] __vm_munmap+0x138/0x3a0 [ 30.684843] __x64_sys_munmap+0x59/0x80 [ 30.685340] do_syscall_64+0x3f/0x90 [ 30.685820] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 30.686463] [ 30.686677] Second to last potentially related work creation: [ 30.687353] kasan_save_stack+0x22/0x50 [ 30.687863] __kasan_record_aux_stack+0x8e/0xa0 [ 30.688457] __call_rcu_common.constprop.0+0x6a/0xb90 [ 30.689094] remove_vma+0x139/0x170 [ 30.689546] do_vmi_align_munmap+0xd4a/0x11f0 [ 30.690106] do_vmi_munmap+0x1f1/0x2b0 [ 30.690599] mmap_region+0x1f9/0x2660 [ 30.691073] do_mmap+0x854/0xf00 [ 30.691507] vm_mmap_pgoff+0x1a6/0x3a0 [ 30.691997] ksys_mmap_pgoff+0x3af/0x500 [ 30.692523] do_syscall_64+0x3f/0x90 [ 30.693005] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 30.693656] [ 30.693869] The buggy address belongs to the object at ffff88800f058570 [ 30.693869] which belongs to the cache vm_area_struct of size 168 [ 30.695327] The buggy address is located 88 bytes inside of [ 30.695327] freed 168-byte region [ffff88800f058570, ffff88800f058618) [ 30.696739] [ 30.696956] The buggy address belongs to the physical page: [ 30.697610] page:00000000c89b71ea refcount:1 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0xf058 [ 30.698695] memcg:ffff88800e9c5e01 [ 30.699117] anon flags: 0x100000000000200(slab|node=0|zone=1) [ 30.699978] page_type: 0xffffffff() [ 30.700487] raw: 0100000000000200 ffff8880087a0c80 ffffea00003c1400 dead000000000007 [ 30.701434] raw: 0000000000000000 0000000000110011 00000001ffffffff ffff88800e9c5e01 [ 30.702331] page dumped because: kasan: bad access detected [ 30.702985] [ 30.703201] Memory state around the buggy address: [ 30.703777] ffff88800f058480: fc fa fb fb fb fb fb fb fb fb fb fb fb fb fb fb [ 30.704654] ffff88800f058500: fb fb fb fb fb fb fc fc fc fc fc fc fc fc fa fb [ 30.705513] >ffff88800f058580: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb [ 30.706358] ^ [ 30.707045] ffff88800f058600: fb fb fb fc fc fc fc fc fc fc fc fa fb fb fb fb [ 30.707898] ffff88800f058680: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb [ 30.708750] ================================================================== [ 30.709793] Disabling lock debugging due to kernel taint [ 32.996682] BUG: Bad rss-counter state mm:00000000ea028c1b type:MM_FILEPAGES val:33 [ 32.997684] BUG: Bad rss-counter state mm:00000000ea028c1b type:MM_ANONPAGES val:22 [ 33.466609] BUG: Bad rss-counter state mm:000000008c2c251d type:MM_FILEPAGES val:33 [ 33.467613] BUG: Bad rss-counter state mm:000000008c2c251d type:MM_ANONPAGES val:22 Warning: Permanently added '[localhost]:44210' (ECDSA) to the list of known hosts. 2023/06/21 02:11:48 fuzzer started 2023/06/21 02:11:48 dialing manager at localhost:36067 2023/06/21 02:11:48 checking machine... 2023/06/21 02:11:48 checking revisions... [ 34.220083] kmemleak: Automatic memory scanning thread ended 2023/06/21 02:11:49 testing simple program... [ 34.282348] cgroup: Unknown subsys name 'net' [ 34.326477] cgroup: Unknown subsys name 'rlimit' executing program executing program executing program VM DIAGNOSIS: 02:11:48 Registers: info registers vcpu 0 RAX=ffffffff861456ad RBX=0000000000000001 RCX=ffffffff861456a8 RDX=0000000000000002 RSI=0000000000000005 RDI=ffffffff85e06584 RBP=ffff88806ce09af0 RSP=ffff88806ce09a28 R8 =ffffffff861456a8 R9 =ffff88806ce09ad8 R10=0000000000038001 R11=0000000000022ef0 R12=ffff88806ce09af8 R13=ffff88806ce09ae0 R14=ffff88806ce09ad9 R15=ffff88806ce09a98 RIP=ffffffff81130a72 RFL=00000246 [---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 00007f24ad8d7900 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=00007f24ade8f0b0 CR3=000000000c5ee000 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=2c2c2c2c2c2c2c2c2c2c2c2c2c2c2c2c XMM01=00000000000000000000000000ff0000 XMM02=00000000000000000000000000ff0000 XMM03=5320444f4854454d5f54505952434e45 XMM04=40404040404040404040404040404040 XMM05=5a5a5a5a5a5a5a5a5a5a5a5a5a5a5a5a XMM06=20202020202020202020202020202020 XMM07=00000000000000000000000000000000 XMM08=6c6f636f746f72702f6374652f006563 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=00007ffe6eda3fc8 CR3=000000000c730000 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=2038343a31313a3230203132206e754a XMM01=73732878696e755f6d6170203a5d3133 XMM02=65736f6c63206e6f6973736573203a29 XMM03=755f6d6170203a5d3133325b64687373 XMM04=69662068637573206f4e203a656c6163 XMM05=3a656c696620766e65206e65706f206f XMM06=65733a6468737328766e655f6d617020 XMM07=6b7a79732038343a31313a3230203132 XMM08=3d656e696c646d632022656369767265 XMM09=00000000000000000000000000000000 XMM10=00000000000000000000000000000000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000