syzkaller login: [ 54.572468] BUG: Bad rss-counter state mm:00000000730c1306 type:MM_FILEPAGES val:33 [ 54.573261] BUG: Bad rss-counter state mm:00000000730c1306 type:MM_ANONPAGES val:22 [ 54.730885] ================================================================== [ 54.731958] BUG: KASAN: slab-use-after-free in vma_interval_tree_remove+0xc75/0xec0 [ 54.733054] Read of size 8 at addr ffff88800fdc5df0 by task sshd/221 [ 54.734119] [ 54.734336] CPU: 1 PID: 221 Comm: sshd Not tainted 6.4.0-rc7-next-20230619 #1 [ 54.735196] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS 1.12.0-1 04/01/2014 [ 54.736179] Call Trace: [ 54.736497] [ 54.736782] dump_stack_lvl+0x91/0xf0 [ 54.737269] print_report+0xcc/0x620 [ 54.737748] ? __virt_addr_valid+0x102/0x340 [ 54.738288] ? vma_interval_tree_remove+0xc75/0xec0 [ 54.738905] ? vma_interval_tree_remove+0xc75/0xec0 [ 54.739513] kasan_report+0xbe/0xf0 [ 54.739980] ? vma_interval_tree_remove+0xc75/0xec0 [ 54.740597] vma_interval_tree_remove+0xc75/0xec0 [ 54.741188] vma_prepare+0xc54/0x11a0 [ 54.741664] __split_vma+0x5af/0x950 [ 54.742129] ? __pfx___split_vma+0x10/0x10 [ 54.742677] ? find_held_lock+0x2c/0x110 [ 54.743199] do_vmi_align_munmap+0x2ba/0x11f0 [ 54.743761] ? lock_is_held_type+0x9f/0x120 [ 54.744303] ? __pfx_do_vmi_align_munmap+0x10/0x10 [ 54.744933] ? mtree_range_walk+0x632/0x900 [ 54.745492] ? mas_walk+0x5c7/0x7c0 [ 54.745972] do_vmi_munmap+0x1f1/0x2b0 [ 54.746462] mmap_region+0x1f9/0x2660 [ 54.746958] ? vm_mmap_pgoff+0x15c/0x3a0 [ 54.747468] ? __pfx_arch_get_unmapped_area_topdown+0x10/0x10 [ 54.748177] ? __pfx_lock_acquire+0x10/0x10 [ 54.748704] ? __pfx_mmap_region+0x10/0x10 [ 54.749233] ? security_mmap_addr+0x7d/0xa0 [ 54.749759] ? get_unmapped_area+0x1f5/0x3f0 [ 54.750304] do_mmap+0x854/0xf00 [ 54.750751] vm_mmap_pgoff+0x1a6/0x3a0 [ 54.751244] ? __pfx_vm_mmap_pgoff+0x10/0x10 [ 54.751799] ksys_mmap_pgoff+0x3af/0x500 [ 54.752301] do_syscall_64+0x3f/0x90 [ 54.752776] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 54.753415] RIP: 0033:0x7f46d217dd82 [ 54.753867] 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 [ 54.756012] RSP: 002b:00007fffb4bc3ce8 EFLAGS: 00000206 ORIG_RAX: 0000000000000009 [ 54.756901] RAX: ffffffffffffffda RBX: 0000000000000812 RCX: 00007f46d217dd82 [ 54.757735] RDX: 0000000000000005 RSI: 0000000000001000 RDI: 00007f46d15b7000 [ 54.758579] RBP: 00007f46d15b7000 R08: 0000000000000009 R09: 0000000000001000 [ 54.759427] R10: 0000000000000812 R11: 0000000000000206 R12: 0000564b624b2f70 [ 54.760279] R13: 00007fffb4bc3d00 R14: 00007fffb4bc3d30 R15: 00007fffb4bc4090 [ 54.761126] [ 54.761414] [ 54.761626] Allocated by task 214: [ 54.762049] kasan_save_stack+0x22/0x50 [ 54.762551] kasan_set_track+0x25/0x30 [ 54.763046] __kasan_slab_alloc+0x59/0x70 [ 54.763570] kmem_cache_alloc+0x16b/0x370 [ 54.764080] vm_area_dup+0x20/0x160 [ 54.764526] __split_vma+0x170/0x950 [ 54.764989] split_vma+0xc6/0x110 [ 54.765426] mprotect_fixup+0x8d2/0xb30 [ 54.765919] do_mprotect_pkey+0x87e/0xd40 [ 54.766441] __x64_sys_mprotect+0x78/0xc0 [ 54.766984] do_syscall_64+0x3f/0x90 [ 54.767456] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 54.768100] [ 54.768314] Freed by task 210: [ 54.768704] kasan_save_stack+0x22/0x50 [ 54.769206] kasan_set_track+0x25/0x30 [ 54.769699] kasan_save_free_info+0x2b/0x50 [ 54.770224] __kasan_slab_free+0x10a/0x190 [ 54.770760] kmem_cache_free+0x10d/0x4d0 [ 54.771267] rcu_core+0x8c8/0x2860 [ 54.771707] __do_softirq+0x1b7/0x7d4 [ 54.772182] [ 54.772396] Last potentially related work creation: [ 54.772983] kasan_save_stack+0x22/0x50 [ 54.773492] __kasan_record_aux_stack+0x8e/0xa0 [ 54.774062] __call_rcu_common.constprop.0+0x6a/0xb90 [ 54.774812] remove_vma+0x139/0x170 [ 54.775267] do_vmi_align_munmap+0xd4a/0x11f0 [ 54.775820] do_vmi_munmap+0x1f1/0x2b0 [ 54.776303] __vm_munmap+0x138/0x3a0 [ 54.776766] __x64_sys_munmap+0x59/0x80 [ 54.777257] do_syscall_64+0x3f/0x90 [ 54.777728] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 54.778361] [ 54.778574] The buggy address belongs to the object at ffff88800fdc5d98 [ 54.778574] which belongs to the cache vm_area_struct of size 168 [ 54.780045] The buggy address is located 88 bytes inside of [ 54.780045] freed 168-byte region [ffff88800fdc5d98, ffff88800fdc5e40) [ 54.781435] [ 54.781647] The buggy address belongs to the physical page: [ 54.782309] page:00000000672372a7 refcount:1 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0xfdc5 [ 54.783395] memcg:ffff888009079d01 [ 54.783821] flags: 0x100000000000200(slab|node=0|zone=1) [ 54.784464] page_type: 0xffffffff() [ 54.784914] raw: 0100000000000200 ffff88800879fc80 dead000000000122 0000000000000000 [ 54.785817] raw: 0000000000000000 0000000000110011 00000001ffffffff ffff888009079d01 [ 54.786739] page dumped because: kasan: bad access detected [ 54.787395] [ 54.787609] Memory state around the buggy address: [ 54.788190] ffff88800fdc5c80: fc fc fc fc fc fc 00 00 00 00 00 00 00 00 00 00 [ 54.789040] ffff88800fdc5d00: 00 00 00 00 00 00 00 00 00 00 00 fc fc fc fc fc [ 54.789881] >ffff88800fdc5d80: fc fc fc fa fb fb fb fb fb fb fb fb fb fb fb fb [ 54.790753] ^ [ 54.791549] ffff88800fdc5e00: fb fb fb fb fb fb fb fb fc fc fc fc fc fc fc fc [ 54.792419] ffff88800fdc5e80: fa fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb [ 54.793262] ================================================================== [ 54.794168] Disabling lock debugging due to kernel taint [ 57.357506] BUG: Bad rss-counter state mm:00000000d8f12810 type:MM_FILEPAGES val:33 [ 57.358729] BUG: Bad rss-counter state mm:00000000d8f12810 type:MM_ANONPAGES val:22 [ 57.842175] BUG: Bad rss-counter state mm:00000000c0fac517 type:MM_FILEPAGES val:33 [ 57.843168] BUG: Bad rss-counter state mm:00000000c0fac517 type:MM_ANONPAGES val:22 Warning: Permanently added '[localhost]:27812' (ECDSA) to the list of known hosts. 2023/06/19 11:44:16 fuzzer started 2023/06/19 11:44:17 dialing manager at localhost:44161 2023/06/19 11:44:17 checking machine... 2023/06/19 11:44:17 checking revisions... [ 58.581661] kmemleak: Automatic memory scanning thread ended 2023/06/19 11:44:17 testing simple program... [ 58.623263] cgroup: Unknown subsys name 'net' [ 58.690941] cgroup: Unknown subsys name 'rlimit' executing program executing program executing program VM DIAGNOSIS: 11:43:52 Registers: info registers vcpu 0 RAX=dffffc0000000000 RBX=ffff888009bfc000 RCX=1ffffffff09a6f70 RDX=ffffffff87f93be0 RSI=00000000000000c0 RDI=ffffffff84d37b80 RBP=0000000000000010 RSP=ffff8880167c7d00 R8 =0000000000000002 R9 =0000000000000000 R10=0000000000000000 R11=00000000000b6996 R12=ffff888009bfc130 R13=ffff888009bfc0b0 R14=ffff888009bfc010 R15=0000000000000000 RIP=ffffffff83648359 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 00007ff796bc4900 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=00007f29ef0d2020 CR3=0000000018fe6000 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=ffef5ea2d888ec9dcf4fcb7f64b7fb01 XMM02=2c67c8bc2e329bc3000000000011fe80 XMM03=fb795ef6d65770560000000000124620 XMM04=002db631419c689800000000000ae988 XMM05=e4cb8bb95a7664b60000000000134230 XMM06=c291bd5c70af25b900000000001340b8 XMM07=e042d86d42eb936e00000000001248a0 XMM08=dffb8baec8a6c696000000000011fee0 XMM09=00000000000000000000000000000000 XMM10=00000000000000000000000000000000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000 info registers vcpu 1 RAX=ffff88806cf35000 RBX=0000000000000001 RCX=ffffffff8450c50e RDX=ffffed100d9e6a01 RSI=0000000000000004 RDI=ffffffff812889a5 RBP=dffffc0000000000 RSP=ffff888008e27e70 R8 =0000000000000000 R9 =ffffed100d9e6a00 R10=ffff88806cf35003 R11=0000000000000001 R12=ffffffff85d3bed0 R13=1ffff110011c4fd3 R14=0000000000000000 R15=0000000000000000 RIP=ffffffff8450d49f 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=00007ff79717c0b0 CR3=000000000d790000 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=2036313a34343a3131203931206e754a XMM01=73732878696e755f6d6170203a5d3033 XMM02=65736f6c63206e6f6973736573203a29 XMM03=755f6d6170203a5d3033325b64687373 XMM04=69662068637573206f4e203a656c6163 XMM05=3a656c696620766e65206e65706f206f XMM06=65733a6468737328766e655f6d617020 XMM07=6b7a79732036313a34343a3131203931 XMM08=3d656e696c646d632022656369767265 XMM09=00000000000000000000000000000000 XMM10=00000000000000000000000000000000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000