syzkaller login: [ 31.182560] BUG: Bad rss-counter state mm:000000000b62262c type:MM_FILEPAGES val:33 [ 31.183996] BUG: Bad rss-counter state mm:000000000b62262c type:MM_ANONPAGES val:22 [ 31.369267] ================================================================== [ 31.370238] BUG: KASAN: slab-use-after-free in vma_interval_tree_remove+0xc75/0xec0 [ 31.371323] Read of size 8 at addr ffff88800dc44b38 by task sshd/221 [ 31.372454] [ 31.372689] CPU: 1 PID: 221 Comm: sshd Not tainted 6.4.0-rc7-next-20230619 #1 [ 31.373622] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS 1.12.0-1 04/01/2014 [ 31.374688] Call Trace: [ 31.375046] <TASK> [ 31.375362] dump_stack_lvl+0x91/0xf0 [ 31.375915] print_report+0xcc/0x620 [ 31.376440] ? __virt_addr_valid+0x102/0x340 [ 31.377042] ? vma_interval_tree_remove+0xc75/0xec0 [ 31.377709] ? vma_interval_tree_remove+0xc75/0xec0 [ 31.378390] kasan_report+0xbe/0xf0 [ 31.378931] ? vma_interval_tree_remove+0xc75/0xec0 [ 31.379607] vma_interval_tree_remove+0xc75/0xec0 [ 31.380282] vma_prepare+0xc54/0x11a0 [ 31.380819] __split_vma+0x5af/0x950 [ 31.381334] ? __pfx___split_vma+0x10/0x10 [ 31.381930] ? find_held_lock+0x2c/0x110 [ 31.382511] do_vmi_align_munmap+0x2ba/0x11f0 [ 31.383137] ? lock_is_held_type+0x9f/0x120 [ 31.383725] ? __pfx_do_vmi_align_munmap+0x10/0x10 [ 31.384403] ? mtree_range_walk+0x632/0x900 [ 31.385028] ? mas_walk+0x5c7/0x7c0 [ 31.385547] do_vmi_munmap+0x1f1/0x2b0 [ 31.386103] mmap_region+0x1f9/0x2660 [ 31.386649] ? vm_mmap_pgoff+0x15c/0x3a0 [ 31.387211] ? __pfx_arch_get_unmapped_area_topdown+0x10/0x10 [ 31.388007] ? __pfx_lock_acquire+0x10/0x10 [ 31.388571] ? __pfx_mmap_region+0x10/0x10 [ 31.389147] ? security_mmap_addr+0x7d/0xa0 [ 31.389712] ? get_unmapped_area+0x1f5/0x3f0 [ 31.390323] do_mmap+0x854/0xf00 [ 31.390808] vm_mmap_pgoff+0x1a6/0x3a0 [ 31.391337] ? __pfx_vm_mmap_pgoff+0x10/0x10 [ 31.391957] ksys_mmap_pgoff+0x3af/0x500 [ 31.392494] do_syscall_64+0x3f/0x90 [ 31.393024] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 31.393708] RIP: 0033:0x7f735a42cd82 [ 31.394213] 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 [ 31.396570] RSP: 002b:00007ffcc164a4e8 EFLAGS: 00000206 ORIG_RAX: 0000000000000009 [ 31.397568] RAX: ffffffffffffffda RBX: 0000000000000812 RCX: 00007f735a42cd82 [ 31.398508] RDX: 0000000000000005 RSI: 0000000000001000 RDI: 00007f7359866000 [ 31.399446] RBP: 00007f7359866000 R08: 0000000000000009 R09: 0000000000001000 [ 31.400391] R10: 0000000000000812 R11: 0000000000000206 R12: 0000555775476ec0 [ 31.401333] R13: 00007ffcc164a500 R14: 00007ffcc164a530 R15: 00007ffcc164a890 [ 31.402285] </TASK> [ 31.402614] [ 31.402865] Allocated by task 214: [ 31.403329] kasan_save_stack+0x22/0x50 [ 31.403906] kasan_set_track+0x25/0x30 [ 31.404448] __kasan_slab_alloc+0x59/0x70 [ 31.405037] kmem_cache_alloc+0x16b/0x370 [ 31.405605] vm_area_dup+0x20/0x160 [ 31.406120] __split_vma+0x170/0x950 [ 31.406655] split_vma+0xc6/0x110 [ 31.407145] mprotect_fixup+0x8d2/0xb30 [ 31.407693] do_mprotect_pkey+0x87e/0xd40 [ 31.408284] __x64_sys_mprotect+0x78/0xc0 [ 31.408866] do_syscall_64+0x3f/0x90 [ 31.409380] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 31.410091] [ 31.410337] Freed by task 214: [ 31.410778] kasan_save_stack+0x22/0x50 [ 31.411323] kasan_set_track+0x25/0x30 [ 31.411887] kasan_save_free_info+0x2b/0x50 [ 31.412464] __kasan_slab_free+0x10a/0x190 [ 31.413142] kmem_cache_free+0x10d/0x4d0 [ 31.413847] rcu_core+0x8c8/0x2860 [ 31.414363] __do_softirq+0x1b7/0x7d4 [ 31.414900] [ 31.415131] Last potentially related work creation: [ 31.415768] kasan_save_stack+0x22/0x50 [ 31.416333] __kasan_record_aux_stack+0x8e/0xa0 [ 31.416980] __call_rcu_common.constprop.0+0x6a/0xb90 [ 31.417687] remove_vma+0x139/0x170 [ 31.418193] do_vmi_align_munmap+0xd4a/0x11f0 [ 31.418828] do_vmi_munmap+0x1f1/0x2b0 [ 31.419360] __vm_munmap+0x138/0x3a0 [ 31.419908] __x64_sys_munmap+0x59/0x80 [ 31.420458] do_syscall_64+0x3f/0x90 [ 31.420996] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 31.421678] [ 31.421928] Second to last potentially related work creation: [ 31.422674] kasan_save_stack+0x22/0x50 [ 31.423238] __kasan_record_aux_stack+0x8e/0xa0 [ 31.423873] __call_rcu_common.constprop.0+0x6a/0xb90 [ 31.424560] remove_vma+0x139/0x170 [ 31.425052] do_vmi_align_munmap+0xd4a/0x11f0 [ 31.425650] do_vmi_munmap+0x1f1/0x2b0 [ 31.426181] mmap_region+0x1f9/0x2660 [ 31.426707] do_mmap+0x854/0xf00 [ 31.427182] vm_mmap_pgoff+0x1a6/0x3a0 [ 31.427701] ksys_mmap_pgoff+0x3af/0x500 [ 31.428257] do_syscall_64+0x3f/0x90 [ 31.428780] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 31.429470] [ 31.429697] The buggy address belongs to the object at ffff88800dc44ae0 [ 31.429697] which belongs to the cache vm_area_struct of size 168 [ 31.431303] The buggy address is located 88 bytes inside of [ 31.431303] freed 168-byte region [ffff88800dc44ae0, ffff88800dc44b88) [ 31.432845] [ 31.433079] The buggy address belongs to the physical page: [ 31.433785] page:0000000085cba5d7 refcount:1 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0xdc44 [ 31.434974] memcg:ffff88800a128c01 [ 31.435431] anon flags: 0x100000000000200(slab|node=0|zone=1) [ 31.436207] page_type: 0xffffffff() [ 31.436691] raw: 0100000000000200 ffff88800879fc80 ffffea00005bcd00 dead000000000003 [ 31.437685] raw: 0000000000000000 0000000000110011 00000001ffffffff ffff88800a128c01 [ 31.438670] page dumped because: kasan: bad access detected [ 31.439408] [ 31.439645] Memory state around the buggy address: [ 31.440299] ffff88800dc44a00: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb [ 31.441248] ffff88800dc44a80: fb fb fb fb fc fc fc fc fc fc fc fc fa fb fb fb [ 31.442192] >ffff88800dc44b00: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb [ 31.443137] ^ [ 31.443828] ffff88800dc44b80: fb fc fc fc fc fc fc fc fc fa fb fb fb fb fb fb [ 31.444779] ffff88800dc44c00: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fc fc [ 31.445732] ================================================================== [ 31.446802] Disabling lock debugging due to kernel taint [ 33.471806] BUG: Bad rss-counter state mm:000000007bc34789 type:MM_FILEPAGES val:33 [ 33.473090] BUG: Bad rss-counter state mm:000000007bc34789 type:MM_ANONPAGES val:22 [ 34.065318] BUG: Bad rss-counter state mm:00000000a81ab435 type:MM_FILEPAGES val:33 [ 34.066524] BUG: Bad rss-counter state mm:00000000a81ab435 type:MM_ANONPAGES val:22 Warning: Permanently added '[localhost]:24653' (ECDSA) to the list of known hosts. 2023/06/19 19:38:34 fuzzer started 2023/06/19 19:38:34 dialing manager at localhost:44161 2023/06/19 19:38:34 checking machine... 2023/06/19 19:38:34 checking revisions... [ 34.702417] kmemleak: Automatic memory scanning thread ended 2023/06/19 19:38:34 testing simple program... [ 34.753306] cgroup: Unknown subsys name 'net' [ 34.793839] cgroup: Unknown subsys name 'rlimit' executing program executing program executing program VM DIAGNOSIS: 19:38:33 Registers: info registers vcpu 0 RAX=0000000000000000 RBX=0000000000000002 RCX=ffffffff8613753e RDX=1ffff1100d9c1353 RSI=0000000000000000 RDI=0000000000000001 RBP=ffff88806ce09af0 RSP=ffff88806ce09a28 R8 =ffffffff86137542 R9 =ffff88806ce09ad8 R10=0000000000038001 R11=0000000000020d8a R12=ffff88806ce09af8 R13=ffff88806ce09ae0 R14=ffff88806ce09df8 R15=ffff88806ce09a98 RIP=ffffffff81131271 RFL=00000216 [----AP-] 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 =0000 0000000000000000 00000000 00000000 DS =0000 0000000000000000 00000000 00000000 FS =0000 00007fc4cb203900 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=00007fc4cb1b701c CR3=000000000d810000 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=ffffffff00ffffffffffffffffffffff XMM01=707465675f6c697475646f6d6d61705f XMM02=ff000000000000ff0000000000ff0000 XMM03=66207463656e6e6f6373696420646576 XMM04=00000000000000000000000000000000 XMM05=00000000000000000000000000000000 XMM06=0d0c0f0e09080b0a0504070601000302 XMM07=00000000000000000000000000000000 XMM08=000a0d732a2e25006c61746166003367 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=ffff888008c58400 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=00007fffe4189c08 CR3=000000000dd88000 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=2033333a38333a3931203931206e754a XMM01=73732878696e755f6d6170203a5d3033 XMM02=65736f6c63206e6f6973736573203a29 XMM03=755f6d6170203a5d3033325b64687373 XMM04=69662068637573206f4e203a656c6163 XMM05=3a656c696620766e65206e65706f206f XMM06=65733a6468737328766e655f6d617020 XMM07=6b7a79732033333a38333a3931203931 XMM08=3d656e696c646d632022656369767265 XMM09=00000000000000000000000000000000 XMM10=00000000000000000000000000000000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000