syzkaller login: [ 30.360788] BUG: Bad rss-counter state mm:00000000ad79977b type:MM_FILEPAGES val:33 [ 30.362002] BUG: Bad rss-counter state mm:00000000ad79977b type:MM_ANONPAGES val:22 [ 30.398478] ================================================================== [ 30.399367] BUG: KASAN: slab-use-after-free in vma_interval_tree_remove+0xc75/0xec0 [ 30.400307] Read of size 8 at addr ffff888017943310 by task sshd/220 [ 30.401176] [ 30.401396] CPU: 0 PID: 220 Comm: sshd Not tainted 6.4.0-rc7-next-20230619 #1 [ 30.402254] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS 1.12.0-1 04/01/2014 [ 30.403257] Call Trace: [ 30.403578] [ 30.403859] dump_stack_lvl+0x91/0xf0 [ 30.404347] print_report+0xcc/0x620 [ 30.404866] ? __virt_addr_valid+0x102/0x340 [ 30.405415] ? vma_interval_tree_remove+0xc75/0xec0 [ 30.406030] ? vma_interval_tree_remove+0xc75/0xec0 [ 30.406653] kasan_report+0xbe/0xf0 [ 30.407137] ? vma_interval_tree_remove+0xc75/0xec0 [ 30.407762] vma_interval_tree_remove+0xc75/0xec0 [ 30.408378] vma_prepare+0xc54/0x11a0 [ 30.408869] __split_vma+0x5af/0x950 [ 30.409339] ? __pfx___split_vma+0x10/0x10 [ 30.409872] ? find_held_lock+0x2c/0x110 [ 30.410399] do_vmi_align_munmap+0x2ba/0x11f0 [ 30.410955] ? lock_is_held_type+0x9f/0x120 [ 30.411499] ? __pfx_do_vmi_align_munmap+0x10/0x10 [ 30.412101] ? mtree_range_walk+0x632/0x900 [ 30.412662] ? mas_walk+0x5c7/0x7c0 [ 30.413136] do_vmi_munmap+0x1f1/0x2b0 [ 30.413620] mmap_region+0x1f9/0x2660 [ 30.414093] ? vm_mmap_pgoff+0x15c/0x3a0 [ 30.414602] ? __pfx_arch_get_unmapped_area_topdown+0x10/0x10 [ 30.415304] ? __pfx_lock_acquire+0x10/0x10 [ 30.415837] ? __pfx_mmap_region+0x10/0x10 [ 30.416367] ? security_mmap_addr+0x7d/0xa0 [ 30.416900] ? get_unmapped_area+0x1f5/0x3f0 [ 30.417446] do_mmap+0x854/0xf00 [ 30.417892] vm_mmap_pgoff+0x1a6/0x3a0 [ 30.418380] ? __pfx_vm_mmap_pgoff+0x10/0x10 [ 30.418942] ksys_mmap_pgoff+0x3af/0x500 [ 30.419444] do_syscall_64+0x3f/0x90 [ 30.419916] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 30.420560] RIP: 0033:0x7feb27b8ad82 [ 30.421028] 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 [ 30.423133] RSP: 002b:00007fffda686978 EFLAGS: 00000206 ORIG_RAX: 0000000000000009 [ 30.424026] RAX: ffffffffffffffda RBX: 0000000000000812 RCX: 00007feb27b8ad82 [ 30.424883] RDX: 0000000000000005 RSI: 0000000000001000 RDI: 00007feb26fc4000 [ 30.425726] RBP: 00007feb26fc4000 R08: 0000000000000009 R09: 0000000000001000 [ 30.426569] R10: 0000000000000812 R11: 0000000000000206 R12: 000056292253aec0 [ 30.427404] R13: 00007fffda686990 R14: 00007fffda6869c0 R15: 00007fffda686d20 [ 30.428263] [ 30.428549] [ 30.428768] Allocated by task 213: [ 30.429194] kasan_save_stack+0x22/0x50 [ 30.429694] kasan_set_track+0x25/0x30 [ 30.430181] __kasan_slab_alloc+0x59/0x70 [ 30.430701] kmem_cache_alloc+0x16b/0x370 [ 30.431224] vm_area_dup+0x20/0x160 [ 30.431678] __split_vma+0x170/0x950 [ 30.432145] split_vma+0xc6/0x110 [ 30.432576] mprotect_fixup+0x8d2/0xb30 [ 30.433090] do_mprotect_pkey+0x87e/0xd40 [ 30.433602] __x64_sys_mprotect+0x78/0xc0 [ 30.434120] do_syscall_64+0x3f/0x90 [ 30.434585] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 30.435223] [ 30.435435] Freed by task 213: [ 30.435825] kasan_save_stack+0x22/0x50 [ 30.436321] kasan_set_track+0x25/0x30 [ 30.436814] kasan_save_free_info+0x2b/0x50 [ 30.437343] __kasan_slab_free+0x10a/0x190 [ 30.437870] kmem_cache_free+0x10d/0x4d0 [ 30.438375] rcu_core+0x8c8/0x2860 [ 30.438813] __do_softirq+0x1b7/0x7d4 [ 30.439283] [ 30.439495] Last potentially related work creation: [ 30.440074] kasan_save_stack+0x22/0x50 [ 30.440568] __kasan_record_aux_stack+0x8e/0xa0 [ 30.441145] __call_rcu_common.constprop.0+0x6a/0xb90 [ 30.441782] remove_vma+0x139/0x170 [ 30.442229] do_vmi_align_munmap+0xd4a/0x11f0 [ 30.442787] do_vmi_munmap+0x1f1/0x2b0 [ 30.443271] __vm_munmap+0x138/0x3a0 [ 30.443737] __x64_sys_munmap+0x59/0x80 [ 30.444234] do_syscall_64+0x3f/0x90 [ 30.444732] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 30.445373] [ 30.445588] The buggy address belongs to the object at ffff8880179432b8 [ 30.445588] which belongs to the cache vm_area_struct of size 168 [ 30.447053] The buggy address is located 88 bytes inside of [ 30.447053] freed 168-byte region [ffff8880179432b8, ffff888017943360) [ 30.448460] [ 30.448688] The buggy address belongs to the physical page: [ 30.449352] page:00000000f0dca447 refcount:1 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0x17943 [ 30.450425] memcg:ffff888019e4ff01 [ 30.450846] flags: 0x100000000000200(slab|node=0|zone=1) [ 30.451490] page_type: 0xffffffff() [ 30.451941] raw: 0100000000000200 ffff88800879fc80 dead000000000122 0000000000000000 [ 30.452881] raw: 0000000000000000 0000000000110011 00000001ffffffff ffff888019e4ff01 [ 30.453796] page dumped because: kasan: bad access detected [ 30.454449] [ 30.454665] Memory state around the buggy address: [ 30.455243] ffff888017943200: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 fc [ 30.456091] ffff888017943280: fc fc fc fc fc fc fc fa fb fb fb fb fb fb fb fb [ 30.456959] >ffff888017943300: fb fb fb fb fb fb fb fb fb fb fb fb fc fc fc fc [ 30.457801] ^ [ 30.458275] ffff888017943380: fc fc fc fc fa fb fb fb fb fb fb fb fb fb fb fb [ 30.459121] ffff888017943400: fb fb fb fb fb fb fb fb fb fc fc fc fc fc fc fc [ 30.459966] ================================================================== [ 30.461070] Disabling lock debugging due to kernel taint [ 32.727904] BUG: Bad rss-counter state mm:000000003066476c type:MM_FILEPAGES val:33 [ 32.729621] BUG: Bad rss-counter state mm:000000003066476c type:MM_ANONPAGES val:22 [ 33.235292] BUG: Bad rss-counter state mm:0000000014392847 type:MM_FILEPAGES val:33 [ 33.236293] BUG: Bad rss-counter state mm:0000000014392847 type:MM_ANONPAGES val:22 Warning: Permanently added '[localhost]:55549' (ECDSA) to the list of known hosts. 2023/06/19 21:36:27 fuzzer started 2023/06/19 21:36:28 dialing manager at localhost:44161 2023/06/19 21:36:28 checking machine... 2023/06/19 21:36:28 checking revisions... [ 34.006444] kmemleak: Automatic memory scanning thread ended 2023/06/19 21:36:28 testing simple program... [ 34.056791] cgroup: Unknown subsys name 'net' [ 34.096206] cgroup: Unknown subsys name 'rlimit' executing program executing program executing program VM DIAGNOSIS: 21:36:27 Registers: info registers vcpu 0 RAX=0000000000000000 RBX=ffff88800c8a9d10 RCX=0000000000000000 RDX=000000000000001e RSI=0000000000000000 RDI=ffffed10019153a2 RBP=00000000000000f0 RSP=ffff888015cb78c8 R8 =ffff88800c8a9d10 R9 =0000000000000002 R10=ffffed10019153a2 R11=ffff88800f089000 R12=ffff88800c8a9d10 R13=0000000000092c40 R14=0000000000000000 R15=0000000000092c40 RIP=ffffffff8450d466 RFL=00000206 [-----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 =0000 0000000000000000 00000000 00000000 DS =0000 0000000000000000 00000000 00000000 FS =0000 00007f21b5987900 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=00007f21b4ea7000 CR3=000000000c608000 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=00000000001114b8b3285ca56c489dff XMM01=000000000011c7587e8a42789393c4b7 XMM02=000000000011c860eff9b2d0a8fce9cb XMM03=000000000011c9302c67c8bc2e329bc3 XMM04=c93166868dfed75800000000000ae988 XMM05=916241ecab7562ac0000000000134e00 XMM06=4fda316b135da52b0000000000133bb8 XMM07=fb795ef6d65770560000000000124178 XMM08=2c67c8bc2e329bc3000000000011c8d0 XMM09=00000000000000000000000000000000 XMM10=20200000000020202020202020200000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000 info registers vcpu 1 RAX=0000000000000000 RBX=0000000000000001 RCX=ffffffff8180995c RDX=dffffc0000000000 RSI=ffffffff8180995d RDI=ffff8880178875a8 RBP=ffff888017887600 RSP=ffff888017887538 R8 =0000000000000001 R9 =ffff8880178875e8 R10=0000000000038001 R11=0000000000020dae R12=ffff888017887608 R13=ffff8880178875f0 R14=ffff8880178875e9 R15=ffff8880178875a8 RIP=ffffffff81130719 RFL=00000286 [--S--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 00007f268ecfb900 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=00007f268f2b2618 CR3=000000000d8b6000 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=6e69676f6c5f6d61702c78756e696c65 XMM02=755f6d61702c74696d7265705f6d6170 XMM03=2c766e655f6d61702c7374696d696c5f XMM04=6d61702c766e655f6d61702c7374696d XMM05=78696e755f6d61702c74696d7265705f XMM06=6469756e69676f6c5f6d61702c78756e XMM07=672065736f6c635f6e6f69737365733a XMM08=61662029286e65706f5f746964756100 XMM09=00000000000000000000000000000000 XMM10=00000000000000000000000000000000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000