syzkaller login: [ 47.238491] BUG: Bad rss-counter state mm:000000007c2666b8 type:MM_FILEPAGES val:33 [ 47.240430] BUG: Bad rss-counter state mm:000000007c2666b8 type:MM_ANONPAGES val:22 [ 47.413513] ================================================================== [ 47.414492] BUG: KASAN: slab-use-after-free in vma_interval_tree_remove+0xc75/0xec0 [ 47.415461] Read of size 8 at addr ffff888016da5228 by task sshd/218 [ 47.416287] [ 47.416515] CPU: 0 PID: 218 Comm: sshd Not tainted 6.4.0-rc7-next-20230619 #1 [ 47.417518] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS 1.12.0-1 04/01/2014 [ 47.418546] Call Trace: [ 47.418890] [ 47.419190] dump_stack_lvl+0x91/0xf0 [ 47.419709] print_report+0xcc/0x620 [ 47.420218] ? __virt_addr_valid+0x102/0x340 [ 47.420811] ? vma_interval_tree_remove+0xc75/0xec0 [ 47.421492] ? vma_interval_tree_remove+0xc75/0xec0 [ 47.422135] kasan_report+0xbe/0xf0 [ 47.422641] ? vma_interval_tree_remove+0xc75/0xec0 [ 47.423295] vma_interval_tree_remove+0xc75/0xec0 [ 47.423925] vma_prepare+0xc54/0x11a0 [ 47.424423] __split_vma+0x5af/0x950 [ 47.424921] ? __pfx___split_vma+0x10/0x10 [ 47.425488] ? find_held_lock+0x2c/0x110 [ 47.426052] do_vmi_align_munmap+0x2ba/0x11f0 [ 47.426646] ? lock_is_held_type+0x9f/0x120 [ 47.427216] ? __pfx_do_vmi_align_munmap+0x10/0x10 [ 47.427848] ? mtree_range_walk+0x632/0x900 [ 47.428420] ? mas_walk+0x5c7/0x7c0 [ 47.428925] do_vmi_munmap+0x1f1/0x2b0 [ 47.429463] mmap_region+0x1f9/0x2660 [ 47.429981] ? vm_mmap_pgoff+0x15c/0x3a0 [ 47.430526] ? __pfx_arch_get_unmapped_area_topdown+0x10/0x10 [ 47.431294] ? __pfx_lock_acquire+0x10/0x10 [ 47.431865] ? __pfx_mmap_region+0x10/0x10 [ 47.432422] ? security_mmap_addr+0x7d/0xa0 [ 47.433006] ? get_unmapped_area+0x1f5/0x3f0 [ 47.433593] do_mmap+0x854/0xf00 [ 47.434053] vm_mmap_pgoff+0x1a6/0x3a0 [ 47.434595] ? __pfx_vm_mmap_pgoff+0x10/0x10 [ 47.435207] ksys_mmap_pgoff+0x3af/0x500 [ 47.435755] do_syscall_64+0x3f/0x90 [ 47.436275] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 47.436976] RIP: 0033:0x7f8ac85add82 [ 47.437482] 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 [ 47.439795] RSP: 002b:00007ffcfef9e338 EFLAGS: 00000206 ORIG_RAX: 0000000000000009 [ 47.440780] RAX: ffffffffffffffda RBX: 0000000000000812 RCX: 00007f8ac85add82 [ 47.441717] RDX: 0000000000000005 RSI: 0000000000001000 RDI: 00007f8ac79e7000 [ 47.442642] RBP: 00007f8ac79e7000 R08: 0000000000000009 R09: 0000000000001000 [ 47.443557] R10: 0000000000000812 R11: 0000000000000206 R12: 00005610cf323ec0 [ 47.444473] R13: 00007ffcfef9e350 R14: 00007ffcfef9e380 R15: 00007ffcfef9e6e0 [ 47.445415] [ 47.445733] [ 47.445969] Allocated by task 211: [ 47.446434] kasan_save_stack+0x22/0x50 [ 47.446977] kasan_set_track+0x25/0x30 [ 47.447513] __kasan_slab_alloc+0x59/0x70 [ 47.448081] kmem_cache_alloc+0x16b/0x370 [ 47.448643] vm_area_dup+0x20/0x160 [ 47.449145] __split_vma+0x170/0x950 [ 47.449646] split_vma+0xc6/0x110 [ 47.450124] mprotect_fixup+0x8d2/0xb30 [ 47.450672] do_mprotect_pkey+0x87e/0xd40 [ 47.451238] __x64_sys_mprotect+0x78/0xc0 [ 47.451804] do_syscall_64+0x3f/0x90 [ 47.452313] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 47.453017] [ 47.453248] Freed by task 211: [ 47.453667] kasan_save_stack+0x22/0x50 [ 47.454215] kasan_set_track+0x25/0x30 [ 47.454748] kasan_save_free_info+0x2b/0x50 [ 47.455330] __kasan_slab_free+0x10a/0x190 [ 47.455907] kmem_cache_free+0x10d/0x4d0 [ 47.456457] rcu_core+0x8c8/0x2860 [ 47.456937] __do_softirq+0x1b7/0x7d4 [ 47.457460] [ 47.457692] Last potentially related work creation: [ 47.458321] kasan_save_stack+0x22/0x50 [ 47.458867] __kasan_record_aux_stack+0x8e/0xa0 [ 47.459489] __call_rcu_common.constprop.0+0x6a/0xb90 [ 47.460188] remove_vma+0x139/0x170 [ 47.460677] do_vmi_align_munmap+0xd4a/0x11f0 [ 47.461299] do_vmi_munmap+0x1f1/0x2b0 [ 47.461828] __vm_munmap+0x138/0x3a0 [ 47.462327] __x64_sys_munmap+0x59/0x80 [ 47.462860] do_syscall_64+0x3f/0x90 [ 47.463367] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 47.464054] [ 47.464280] The buggy address belongs to the object at ffff888016da51d0 [ 47.464280] which belongs to the cache vm_area_struct of size 168 [ 47.465871] The buggy address is located 88 bytes inside of [ 47.465871] freed 168-byte region [ffff888016da51d0, ffff888016da5278) [ 47.467382] [ 47.467612] The buggy address belongs to the physical page: [ 47.468325] page:0000000090079aad refcount:1 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0x16da5 [ 47.469516] memcg:ffff88800ed87e01 [ 47.469970] anon flags: 0x100000000000200(slab|node=0|zone=1) [ 47.470718] page_type: 0xffffffff() [ 47.471201] raw: 0100000000000200 ffff88800879fc80 0000000000000000 dead000000000001 [ 47.472191] raw: 0000000000000000 0000000000110011 00000001ffffffff ffff88800ed87e01 [ 47.473178] page dumped because: kasan: bad access detected [ 47.473881] [ 47.474113] Memory state around the buggy address: [ 47.474732] ffff888016da5100: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 [ 47.475651] ffff888016da5180: 00 00 fc fc fc fc fc fc fc fc fa fb fb fb fb fb [ 47.476573] >ffff888016da5200: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fc [ 47.477500] ^ [ 47.478092] ffff888016da5280: fc fc fc fc fc fc fc fa fb fb fb fb fb fb fb fb [ 47.479013] ffff888016da5300: fb fb fb fb fb fb fb fb fb fb fb fb fc fc fc fc [ 47.479913] ================================================================== [ 47.481045] Disabling lock debugging due to kernel taint [ 49.323106] BUG: Bad rss-counter state mm:0000000006307d7b type:MM_FILEPAGES val:33 [ 49.324296] BUG: Bad rss-counter state mm:0000000006307d7b type:MM_ANONPAGES val:22 [ 49.777653] BUG: Bad rss-counter state mm:000000007260d6b0 type:MM_FILEPAGES val:33 [ 49.778654] BUG: Bad rss-counter state mm:000000007260d6b0 type:MM_ANONPAGES val:22 Warning: Permanently added '[localhost]:28194' (ECDSA) to the list of known hosts. 2023/06/19 22:01:20 fuzzer started 2023/06/19 22:01:20 dialing manager at localhost:44161 2023/06/19 22:01:20 checking machine... 2023/06/19 22:01:20 checking revisions... [ 50.468709] kmemleak: Automatic memory scanning thread ended 2023/06/19 22:01:21 testing simple program... [ 50.515344] cgroup: Unknown subsys name 'net' [ 50.554491] cgroup: Unknown subsys name 'rlimit' executing program executing program executing program VM DIAGNOSIS: 22:01:12 Registers: info registers vcpu 0 RAX=ffffffff8613751f RBX=0000000000000001 RCX=ffffffff8613751a RDX=0000000000000000 RSI=1ffffffff0c26ea3 RDI=ffffffff85dfc9fc RBP=ffff888008d7f9a8 RSP=ffff888008d7f8e0 R8 =ffffffff86137508 R9 =ffff888008d7f990 R10=0000000000038001 R11=0000000000020d8a R12=ffff888008d7f9b0 R13=ffff888008d7f998 R14=ffff888008d7f991 R15=ffff888008d7f950 RIP=ffffffff81130a5b RFL=00000217 [----APC] 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 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=00007f7789d40618 CR3=000000000e262000 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=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 info registers vcpu 1 RAX=0000000000000001 RBX=ffff88800d7be5f0 RCX=ffff88800d7be5f0 RDX=00000000000d000d RSI=ffff88800d7be5f0 RDI=ffff88800844f780 RBP=ffff888015f97a28 RSP=ffff888015f97990 R8 =00000000800d000c R9 =0000000000000000 R10=ffffea000035ef80 R11=00000000000d000c R12=ffffea000035ef80 R13=0000000000000000 R14=00000000000d000c R15=ffff88800844f780 RIP=ffffffff818094f2 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 00007f7789789900 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=00007fffb606f000 CR3=000000000e262000 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=635f6e6f69737365733a4d41503d706f XMM01=6f6c5f6d61702c78756e696c65735f6d XMM02=61702c74696d7265705f6d61702c7469 XMM03=655f6d61702c7374696d696c5f6d6170 XMM04=3d6c616e696d72657420322e322e302e XMM05=3d656d616e74736f682022646873732f XMM06=746f6f72223d746363612078756e696c XMM07=6e655f6d61702c7374696d696c5f6d61 XMM08=652075253d64692073253d706f000000 XMM09=00000000000000000000000000000000 XMM10=00000000000000000000000000000000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000