syzkaller login: [ 42.360053] BUG: Bad rss-counter state mm:000000004e98f03a type:MM_FILEPAGES val:33 [ 42.361259] BUG: Bad rss-counter state mm:000000004e98f03a type:MM_ANONPAGES val:22 [ 42.402821] ================================================================== [ 42.403932] BUG: KASAN: slab-use-after-free in vma_interval_tree_remove+0xc75/0xec0 [ 42.404870] Read of size 8 at addr ffff88800efa5b38 by task sshd/221 [ 42.405641] [ 42.405859] CPU: 0 PID: 221 Comm: sshd Not tainted 6.4.0-rc7-next-20230619 #1 [ 42.406743] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS 1.12.0-1 04/01/2014 [ 42.407709] Call Trace: [ 42.408026] [ 42.408311] dump_stack_lvl+0x91/0xf0 [ 42.408803] print_report+0xcc/0x620 [ 42.409293] ? __virt_addr_valid+0x102/0x340 [ 42.409842] ? vma_interval_tree_remove+0xc75/0xec0 [ 42.410468] ? vma_interval_tree_remove+0xc75/0xec0 [ 42.411082] kasan_report+0xbe/0xf0 [ 42.411577] ? vma_interval_tree_remove+0xc75/0xec0 [ 42.412199] vma_interval_tree_remove+0xc75/0xec0 [ 42.412800] vma_prepare+0xc54/0x11a0 [ 42.413281] __split_vma+0x5af/0x950 [ 42.413764] ? __pfx___split_vma+0x10/0x10 [ 42.414303] ? find_held_lock+0x2c/0x110 [ 42.414843] do_vmi_align_munmap+0x2ba/0x11f0 [ 42.415412] ? lock_is_held_type+0x9f/0x120 [ 42.415949] ? __pfx_do_vmi_align_munmap+0x10/0x10 [ 42.416553] ? mtree_range_walk+0x632/0x900 [ 42.417099] ? mas_walk+0x5c7/0x7c0 [ 42.417568] do_vmi_munmap+0x1f1/0x2b0 [ 42.418058] mmap_region+0x1f9/0x2660 [ 42.418551] ? vm_mmap_pgoff+0x15c/0x3a0 [ 42.419062] ? __pfx_arch_get_unmapped_area_topdown+0x10/0x10 [ 42.419783] ? __pfx_lock_acquire+0x10/0x10 [ 42.420307] ? __pfx_mmap_region+0x10/0x10 [ 42.420836] ? security_mmap_addr+0x7d/0xa0 [ 42.421362] ? get_unmapped_area+0x1f5/0x3f0 [ 42.421909] do_mmap+0x854/0xf00 [ 42.422349] vm_mmap_pgoff+0x1a6/0x3a0 [ 42.422876] ? __pfx_vm_mmap_pgoff+0x10/0x10 [ 42.423437] ksys_mmap_pgoff+0x3af/0x500 [ 42.423939] do_syscall_64+0x3f/0x90 [ 42.424421] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 42.425059] RIP: 0033:0x7f76ad9c0d82 [ 42.425514] 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 [ 42.427634] RSP: 002b:00007ffd96424ff8 EFLAGS: 00000206 ORIG_RAX: 0000000000000009 [ 42.428531] RAX: ffffffffffffffda RBX: 0000000000000812 RCX: 00007f76ad9c0d82 [ 42.429375] RDX: 0000000000000005 RSI: 0000000000001000 RDI: 00007f76acdfa000 [ 42.430425] RBP: 00007f76acdfa000 R08: 0000000000000009 R09: 0000000000001000 [ 42.431264] R10: 0000000000000812 R11: 0000000000000206 R12: 00005624a3b48f70 [ 42.432126] R13: 00007ffd96425010 R14: 00007ffd96425040 R15: 00007ffd964253a0 [ 42.432986] [ 42.433277] [ 42.433494] Allocated by task 214: [ 42.433924] kasan_save_stack+0x22/0x50 [ 42.434434] kasan_set_track+0x25/0x30 [ 42.434927] __kasan_slab_alloc+0x59/0x70 [ 42.435444] kmem_cache_alloc+0x16b/0x370 [ 42.435960] vm_area_dup+0x20/0x160 [ 42.436418] __split_vma+0x170/0x950 [ 42.436884] split_vma+0xc6/0x110 [ 42.437320] mprotect_fixup+0x8d2/0xb30 [ 42.437818] do_mprotect_pkey+0x87e/0xd40 [ 42.438337] __x64_sys_mprotect+0x78/0xc0 [ 42.438876] do_syscall_64+0x3f/0x90 [ 42.439344] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 42.439984] [ 42.440197] Freed by task 203: [ 42.440587] kasan_save_stack+0x22/0x50 [ 42.441086] kasan_set_track+0x25/0x30 [ 42.441580] kasan_save_free_info+0x2b/0x50 [ 42.442107] __kasan_slab_free+0x10a/0x190 [ 42.442656] kmem_cache_free+0x10d/0x4d0 [ 42.443174] rcu_core+0x8c8/0x2860 [ 42.443619] __do_softirq+0x1b7/0x7d4 [ 42.444090] [ 42.444303] Last potentially related work creation: [ 42.444888] kasan_save_stack+0x22/0x50 [ 42.445392] __kasan_record_aux_stack+0x8e/0xa0 [ 42.445966] __call_rcu_common.constprop.0+0x6a/0xb90 [ 42.446610] remove_vma+0x139/0x170 [ 42.447062] do_vmi_align_munmap+0xd4a/0x11f0 [ 42.447612] do_vmi_munmap+0x1f1/0x2b0 [ 42.448094] __vm_munmap+0x138/0x3a0 [ 42.448560] __x64_sys_munmap+0x59/0x80 [ 42.449051] do_syscall_64+0x3f/0x90 [ 42.449521] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 42.450158] [ 42.450378] The buggy address belongs to the object at ffff88800efa5ae0 [ 42.450378] which belongs to the cache vm_area_struct of size 168 [ 42.451841] The buggy address is located 88 bytes inside of [ 42.451841] freed 168-byte region [ffff88800efa5ae0, ffff88800efa5b88) [ 42.453242] [ 42.453466] The buggy address belongs to the physical page: [ 42.454122] page:00000000e8890e2d refcount:1 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0xefa5 [ 42.455219] memcg:ffff88800ee1ad01 [ 42.455640] anon flags: 0x100000000000200(slab|node=0|zone=1) [ 42.456336] page_type: 0xffffffff() [ 42.456789] raw: 0100000000000200 ffff88800879fc80 0000000000000000 dead000000000001 [ 42.457716] raw: 0000000000000000 0000000000110011 00000001ffffffff ffff88800ee1ad01 [ 42.458627] page dumped because: kasan: bad access detected [ 42.459286] [ 42.459501] Memory state around the buggy address: [ 42.460083] ffff88800efa5a00: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 [ 42.460934] ffff88800efa5a80: 00 00 00 00 fc fc fc fc fc fc fc fc fa fb fb fb [ 42.461796] >ffff88800efa5b00: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb [ 42.462658] ^ [ 42.463269] ffff88800efa5b80: fb fc fc fc fc fc fc fc fc 00 00 00 00 00 00 00 [ 42.464118] ffff88800efa5c00: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 fc fc [ 42.464972] ================================================================== [ 42.466013] Disabling lock debugging due to kernel taint [ 45.256063] BUG: Bad rss-counter state mm:0000000035dfdfa7 type:MM_FILEPAGES val:33 [ 45.257025] BUG: Bad rss-counter state mm:0000000035dfdfa7 type:MM_ANONPAGES val:22 [ 45.741206] BUG: Bad rss-counter state mm:0000000002d4d3dd type:MM_FILEPAGES val:33 [ 45.742505] BUG: Bad rss-counter state mm:0000000002d4d3dd type:MM_ANONPAGES val:22 Warning: Permanently added '[localhost]:2577' (ECDSA) to the list of known hosts. 2023/06/19 13:50:01 fuzzer started 2023/06/19 13:50:02 dialing manager at localhost:44161 2023/06/19 13:50:02 checking machine... 2023/06/19 13:50:02 checking revisions... [ 46.514286] kmemleak: Automatic memory scanning thread ended 2023/06/19 13:50:02 testing simple program... [ 46.548906] cgroup: Unknown subsys name 'net' [ 46.584216] cgroup: Unknown subsys name 'rlimit' executing program executing program executing program VM DIAGNOSIS: 13:49:50 Registers: info registers vcpu 0 RAX=ffff88806ce35000 RBX=0000000000000000 RCX=ffffffff8450c50e RDX=ffffed100d9c6a01 RSI=0000000000000004 RDI=ffffffff812889a5 RBP=dffffc0000000000 RSP=ffffffff85407e10 R8 =0000000000000000 R9 =ffffed100d9c6a00 R10=ffff88806ce35003 R11=ffff888008c58000 R12=ffffffff85d3bed0 R13=1ffffffff0a80fc7 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 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=00007f26a47ad260 CR3=000000000d5e2000 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=e8d6d9dc3dc68aa9df43b625d2d205e8 XMM02=000000000011d070ec2efd57dc4c00df XMM03=000000000012451034fad882a40af413 XMM04=9a5b9a82ddeb17ac00000000000ae988 XMM05=e4cb8bb95a7664b60000000000134118 XMM06=c291bd5c70af25b90000000000133fa0 XMM07=e042d86d42eb936e0000000000124790 XMM08=34fad882a40af413000000000011d0d0 XMM09=00000000000000000000000000000000 XMM10=00000000000000000000000000000000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000 info registers vcpu 1 RAX=ffffffff83664990 RBX=0000000000000001 RCX=0000000000000001 RDX=ffff88801a0ef701 RSI=ffff88801a0ef728 RDI=ffff88801a0ef728 RBP=ffff88806cf09ac8 RSP=ffff88806cf099f8 R8 =ffffffff86120364 R9 =ffff88806cf09ab0 R10=0000000000038001 R11=000000000001cfe6 R12=ffff88806cf09ad0 R13=ffff88806cf09ab8 R14=ffff88801a0ef730 R15=ffff88806cf09a70 RIP=ffffffff8112fbf3 RFL=00000202 [-------] 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 00007fb696686900 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=00007ffd4aea7ff8 CR3=000000000efae000 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=74696d7265705f6d61703d73726f746e XMM02=000000000000000000000000000000ff XMM03=5320444f4854454d5f54505952434e45 XMM04=40404040404040404040404040404040 XMM05=5a5a5a5a5a5a5a5a5a5a5a5a5a5a5a5a XMM06=20202020202020202020202020202020 XMM07=00000000000000000000000000000000 XMM08=61662029286e65706f5f746964756100 XMM09=00000000000000000000000000000000 XMM10=00000000000000000000000000000000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000