syzkaller login: [ 35.301891] BUG: Bad rss-counter state mm:00000000c9e2da99 type:MM_FILEPAGES val:33 [ 35.302627] BUG: Bad rss-counter state mm:00000000c9e2da99 type:MM_ANONPAGES val:22 [ 35.466058] ================================================================== [ 35.467007] BUG: KASAN: slab-use-after-free in vma_interval_tree_remove+0xc75/0xec0 [ 35.467960] Read of size 8 at addr ffff88800f138b38 by task sshd/221 [ 35.468878] [ 35.469107] CPU: 1 PID: 221 Comm: sshd Not tainted 6.4.0-rc7-next-20230619 #1 [ 35.469992] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS 1.12.0-1 04/01/2014 [ 35.470995] Call Trace: [ 35.471330] [ 35.471612] dump_stack_lvl+0x91/0xf0 [ 35.472110] print_report+0xcc/0x620 [ 35.472621] ? __virt_addr_valid+0x102/0x340 [ 35.473189] ? vma_interval_tree_remove+0xc75/0xec0 [ 35.473818] ? vma_interval_tree_remove+0xc75/0xec0 [ 35.474440] kasan_report+0xbe/0xf0 [ 35.474934] ? vma_interval_tree_remove+0xc75/0xec0 [ 35.475579] vma_interval_tree_remove+0xc75/0xec0 [ 35.476178] vma_prepare+0xc54/0x11a0 [ 35.476666] __split_vma+0x5af/0x950 [ 35.477160] ? __pfx___split_vma+0x10/0x10 [ 35.477685] ? find_held_lock+0x2c/0x110 [ 35.478205] do_vmi_align_munmap+0x2ba/0x11f0 [ 35.478769] ? lock_is_held_type+0x9f/0x120 [ 35.479304] ? __pfx_do_vmi_align_munmap+0x10/0x10 [ 35.479918] ? mtree_range_walk+0x632/0x900 [ 35.480465] ? mas_walk+0x5c7/0x7c0 [ 35.480950] do_vmi_munmap+0x1f1/0x2b0 [ 35.481466] mmap_region+0x1f9/0x2660 [ 35.481982] ? vm_mmap_pgoff+0x15c/0x3a0 [ 35.482492] ? __pfx_arch_get_unmapped_area_topdown+0x10/0x10 [ 35.483204] ? __pfx_lock_acquire+0x10/0x10 [ 35.483735] ? __pfx_mmap_region+0x10/0x10 [ 35.484263] ? security_mmap_addr+0x7d/0xa0 [ 35.484813] ? get_unmapped_area+0x1f5/0x3f0 [ 35.485360] do_mmap+0x854/0xf00 [ 35.485797] vm_mmap_pgoff+0x1a6/0x3a0 [ 35.486288] ? __pfx_vm_mmap_pgoff+0x10/0x10 [ 35.486851] ksys_mmap_pgoff+0x3af/0x500 [ 35.487357] do_syscall_64+0x3f/0x90 [ 35.487836] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 35.488479] RIP: 0033:0x7f5d152b9d82 [ 35.488941] 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 [ 35.491046] RSP: 002b:00007ffcb0fb69f8 EFLAGS: 00000206 ORIG_RAX: 0000000000000009 [ 35.491943] RAX: ffffffffffffffda RBX: 0000000000000812 RCX: 00007f5d152b9d82 [ 35.492787] RDX: 0000000000000005 RSI: 0000000000001000 RDI: 00007f5d146f3000 [ 35.493635] RBP: 00007f5d146f3000 R08: 0000000000000009 R09: 0000000000001000 [ 35.494471] R10: 0000000000000812 R11: 0000000000000206 R12: 0000557acef50ec0 [ 35.495309] R13: 00007ffcb0fb6a10 R14: 00007ffcb0fb6a40 R15: 00007ffcb0fb6da0 [ 35.496165] [ 35.496455] [ 35.496671] Allocated by task 214: [ 35.497110] kasan_save_stack+0x22/0x50 [ 35.497610] kasan_set_track+0x25/0x30 [ 35.498102] __kasan_slab_alloc+0x59/0x70 [ 35.498629] kmem_cache_alloc+0x16b/0x370 [ 35.499147] vm_area_dup+0x20/0x160 [ 35.499605] __split_vma+0x170/0x950 [ 35.500074] split_vma+0xc6/0x110 [ 35.500516] mprotect_fixup+0x8d2/0xb30 [ 35.501027] do_mprotect_pkey+0x87e/0xd40 [ 35.501554] __x64_sys_mprotect+0x78/0xc0 [ 35.502080] do_syscall_64+0x3f/0x90 [ 35.502553] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 35.503202] [ 35.503418] Freed by task 214: [ 35.503810] kasan_save_stack+0x22/0x50 [ 35.504314] kasan_set_track+0x25/0x30 [ 35.504826] kasan_save_free_info+0x2b/0x50 [ 35.505359] __kasan_slab_free+0x10a/0x190 [ 35.505894] kmem_cache_free+0x10d/0x4d0 [ 35.506403] rcu_core+0x8c8/0x2860 [ 35.506847] __do_softirq+0x1b7/0x7d4 [ 35.507322] [ 35.507538] Last potentially related work creation: [ 35.508125] kasan_save_stack+0x22/0x50 [ 35.508628] __kasan_record_aux_stack+0x8e/0xa0 [ 35.509217] __call_rcu_common.constprop.0+0x6a/0xb90 [ 35.509884] remove_vma+0x139/0x170 [ 35.510359] do_vmi_align_munmap+0xd4a/0x11f0 [ 35.510936] do_vmi_munmap+0x1f1/0x2b0 [ 35.511443] __vm_munmap+0x138/0x3a0 [ 35.511925] __x64_sys_munmap+0x59/0x80 [ 35.512443] do_syscall_64+0x3f/0x90 [ 35.512938] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 35.513606] [ 35.513830] The buggy address belongs to the object at ffff88800f138ae0 [ 35.513830] which belongs to the cache vm_area_struct of size 168 [ 35.515378] The buggy address is located 88 bytes inside of [ 35.515378] freed 168-byte region [ffff88800f138ae0, ffff88800f138b88) [ 35.516864] [ 35.517089] The buggy address belongs to the physical page: [ 35.517782] page:00000000094f9d25 refcount:1 mapcount:0 mapping:0000000000000000 index:0xffff88800f138e80 pfn:0xf138 [ 35.519066] memcg:ffff888015e89301 [ 35.519521] anon flags: 0x100000000000200(slab|node=0|zone=1) [ 35.520252] page_type: 0xffffffff() [ 35.520722] raw: 0100000000000200 ffff88800879fc80 0000000000000000 dead000000000001 [ 35.521687] raw: ffff88800f138e80 000000008011000f 00000001ffffffff ffff888015e89301 [ 35.522638] page dumped because: kasan: bad access detected [ 35.523324] [ 35.523544] Memory state around the buggy address: [ 35.524148] ffff88800f138a00: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 [ 35.525065] ffff88800f138a80: 00 00 00 00 fc fc fc fc fc fc fc fc fa fb fb fb [ 35.525965] >ffff88800f138b00: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb [ 35.526845] ^ [ 35.527476] ffff88800f138b80: fb fc fc fc fc fc fc fc fc fa fb fb fb fb fb fb [ 35.528367] ffff88800f138c00: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fc fc [ 35.529266] ================================================================== [ 35.530447] Disabling lock debugging due to kernel taint [ 38.155667] BUG: Bad rss-counter state mm:00000000ee042849 type:MM_FILEPAGES val:33 [ 38.156648] BUG: Bad rss-counter state mm:00000000ee042849 type:MM_ANONPAGES val:22 [ 38.628433] BUG: Bad rss-counter state mm:0000000089b63413 type:MM_FILEPAGES val:33 [ 38.629482] BUG: Bad rss-counter state mm:0000000089b63413 type:MM_ANONPAGES val:22 Warning: Permanently added '[localhost]:19490' (ECDSA) to the list of known hosts. 2023/06/20 03:14:12 fuzzer started 2023/06/20 03:14:13 dialing manager at localhost:44161 2023/06/20 03:14:13 checking machine... 2023/06/20 03:14:13 checking revisions... [ 39.226791] kmemleak: Automatic memory scanning thread ended 2023/06/20 03:14:13 testing simple program... [ 39.264883] cgroup: Unknown subsys name 'net' [ 39.310785] cgroup: Unknown subsys name 'rlimit' executing program executing program executing program VM DIAGNOSIS: 03:14:08 Registers: info registers vcpu 0 RAX=0000000000000000 RBX=ffff88800c9e5000 RCX=0000000000000000 RDX=0000000000000000 RSI=0000000000000000 RDI=ffffed100193ca1d RBP=00000000000000f0 RSP=ffff888019d672d8 R8 =ffff88800c9e5000 R9 =0000000000000000 R10=ffffed100193ca00 R11=ffffffff81806df1 R12=ffff88800c9e5000 R13=0000000000092800 R14=0000000000000000 R15=0000000000092800 RIP=ffffffff8450d454 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 00007f4db6396900 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=00007f4db6375020 CR3=0000000018c4e000 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=652022746f6f72223d74636361207469 XMM02=3d6c616e696d72657420322e322e302e XMM03=3d656d616e74736f682022646873732f XMM04=40404040404040404040404040404040 XMM05=5a5a5a5a5a5a5a5a5a5a5a5a5a5a5a5a XMM06=20202020202020202020202020202020 XMM07=00000000000000000000000000000000 XMM08=652075253d64692073253d706f000000 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=00007efdb5f8d2e8 CR3=000000000c68c000 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=2032313a34313a3330203032206e754a XMM01=73732878696e755f6d6170203a5d3033 XMM02=65736f6c63206e6f6973736573203a29 XMM03=755f6d6170203a5d3033325b64687373 XMM04=69662068637573206f4e203a656c6163 XMM05=3a656c696620766e65206e65706f206f XMM06=65733a6468737328766e655f6d617020 XMM07=6b7a79732032313a34313a3330203032 XMM08=3d656e696c646d632022656369767265 XMM09=00000000000000000000000000000000 XMM10=00000000000000000000000000000000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000