syzkaller login: [ 34.247769] BUG: Bad rss-counter state mm:000000006187f362 type:MM_FILEPAGES val:33 [ 34.248780] BUG: Bad rss-counter state mm:000000006187f362 type:MM_ANONPAGES val:22 [ 34.414869] ================================================================== [ 34.415788] BUG: KASAN: slab-use-after-free in vma_interval_tree_remove+0xc75/0xec0 [ 34.416752] Read of size 8 at addr ffff88800e6514e0 by task sshd/220 [ 34.417533] [ 34.417753] CPU: 0 PID: 220 Comm: sshd Not tainted 6.4.0-rc7-next-20230619 #1 [ 34.418731] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS 1.12.0-1 04/01/2014 [ 34.419734] Call Trace: [ 34.420058] [ 34.420351] dump_stack_lvl+0x91/0xf0 [ 34.420879] print_report+0xcc/0x620 [ 34.421373] ? __virt_addr_valid+0x102/0x340 [ 34.421935] ? vma_interval_tree_remove+0xc75/0xec0 [ 34.422564] ? vma_interval_tree_remove+0xc75/0xec0 [ 34.423204] kasan_report+0xbe/0xf0 [ 34.423684] ? vma_interval_tree_remove+0xc75/0xec0 [ 34.424314] vma_interval_tree_remove+0xc75/0xec0 [ 34.424928] vma_prepare+0xc54/0x11a0 [ 34.425427] __split_vma+0x5af/0x950 [ 34.425908] ? __pfx___split_vma+0x10/0x10 [ 34.426442] ? find_held_lock+0x2c/0x110 [ 34.426977] do_vmi_align_munmap+0x2ba/0x11f0 [ 34.427552] ? lock_is_held_type+0x9f/0x120 [ 34.428095] ? __pfx_do_vmi_align_munmap+0x10/0x10 [ 34.428713] ? mtree_range_walk+0x632/0x900 [ 34.429262] ? mas_walk+0x5c7/0x7c0 [ 34.429742] do_vmi_munmap+0x1f1/0x2b0 [ 34.430238] mmap_region+0x1f9/0x2660 [ 34.430724] ? vm_mmap_pgoff+0x15c/0x3a0 [ 34.431248] ? __pfx_arch_get_unmapped_area_topdown+0x10/0x10 [ 34.431976] ? __pfx_lock_acquire+0x10/0x10 [ 34.432558] ? __pfx_mmap_region+0x10/0x10 [ 34.433094] ? security_mmap_addr+0x7d/0xa0 [ 34.433626] ? get_unmapped_area+0x1f5/0x3f0 [ 34.434188] do_mmap+0x854/0xf00 [ 34.434653] vm_mmap_pgoff+0x1a6/0x3a0 [ 34.435151] ? __pfx_vm_mmap_pgoff+0x10/0x10 [ 34.435718] ksys_mmap_pgoff+0x3af/0x500 [ 34.436227] do_syscall_64+0x3f/0x90 [ 34.436733] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 34.437389] RIP: 0033:0x7f4ff021fd82 [ 34.437858] 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 [ 34.440033] RSP: 002b:00007ffebcf94138 EFLAGS: 00000206 ORIG_RAX: 0000000000000009 [ 34.440977] RAX: ffffffffffffffda RBX: 0000000000000812 RCX: 00007f4ff021fd82 [ 34.441839] RDX: 0000000000000005 RSI: 0000000000001000 RDI: 00007f4fef659000 [ 34.442709] RBP: 00007f4fef659000 R08: 0000000000000009 R09: 0000000000001000 [ 34.443570] R10: 0000000000000812 R11: 0000000000000206 R12: 0000557921616ec0 [ 34.444449] R13: 00007ffebcf94150 R14: 00007ffebcf94180 R15: 00007ffebcf944e0 [ 34.445325] [ 34.445627] [ 34.445845] Allocated by task 213: [ 34.446294] kasan_save_stack+0x22/0x50 [ 34.446828] kasan_set_track+0x25/0x30 [ 34.447334] __kasan_slab_alloc+0x59/0x70 [ 34.447877] kmem_cache_alloc+0x16b/0x370 [ 34.448422] vm_area_dup+0x20/0x160 [ 34.448886] __split_vma+0x170/0x950 [ 34.449366] split_vma+0xc6/0x110 [ 34.449812] mprotect_fixup+0x8d2/0xb30 [ 34.450325] do_mprotect_pkey+0x87e/0xd40 [ 34.450859] __x64_sys_mprotect+0x78/0xc0 [ 34.451379] do_syscall_64+0x3f/0x90 [ 34.451868] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 34.452539] [ 34.452758] Freed by task 203: [ 34.453152] kasan_save_stack+0x22/0x50 [ 34.453662] kasan_set_track+0x25/0x30 [ 34.454161] kasan_save_free_info+0x2b/0x50 [ 34.454699] __kasan_slab_free+0x10a/0x190 [ 34.455239] kmem_cache_free+0x10d/0x4d0 [ 34.455756] rcu_core+0x8c8/0x2860 [ 34.456208] __do_softirq+0x1b7/0x7d4 [ 34.456701] [ 34.456917] Last potentially related work creation: [ 34.457516] kasan_save_stack+0x22/0x50 [ 34.458040] __kasan_record_aux_stack+0x8e/0xa0 [ 34.458617] __call_rcu_common.constprop.0+0x6a/0xb90 [ 34.459274] remove_vma+0x139/0x170 [ 34.459733] do_vmi_align_munmap+0xd4a/0x11f0 [ 34.460294] do_vmi_munmap+0x1f1/0x2b0 [ 34.460807] __vm_munmap+0x138/0x3a0 [ 34.461281] __x64_sys_munmap+0x59/0x80 [ 34.461787] do_syscall_64+0x3f/0x90 [ 34.462267] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 34.462918] [ 34.463133] The buggy address belongs to the object at ffff88800e651488 [ 34.463133] which belongs to the cache vm_area_struct of size 168 [ 34.464643] The buggy address is located 88 bytes inside of [ 34.464643] freed 168-byte region [ffff88800e651488, ffff88800e651530) [ 34.466055] [ 34.466274] The buggy address belongs to the physical page: [ 34.466950] page:000000003556f140 refcount:1 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0xe651 [ 34.468042] memcg:ffff888013afcf01 [ 34.468494] anon flags: 0x100000000000200(slab|node=0|zone=1) [ 34.469202] page_type: 0xffffffff() [ 34.469666] raw: 0100000000000200 ffff88800879fc80 ffffea00002522c0 dead000000000005 [ 34.470596] raw: 0000000000000000 0000000000110011 00000001ffffffff ffff888013afcf01 [ 34.471536] page dumped because: kasan: bad access detected [ 34.472206] [ 34.472445] Memory state around the buggy address: [ 34.473043] ffff88800e651380: fc fc fc fc fa fb fb fb fb fb fb fb fb fb fb fb [ 34.473915] ffff88800e651400: fb fb fb fb fb fb fb fb fb fc fc fc fc fc fc fc [ 34.474781] >ffff88800e651480: fc fa fb fb fb fb fb fb fb fb fb fb fb fb fb fb [ 34.475650] ^ [ 34.476437] ffff88800e651500: fb fb fb fb fb fb fc fc fc fc fc fc fc fc 00 00 [ 34.477314] ffff88800e651580: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 [ 34.478176] ================================================================== [ 34.479172] Disabling lock debugging due to kernel taint [ 36.234667] BUG: Bad rss-counter state mm:00000000dcfe5138 type:MM_FILEPAGES val:33 [ 36.235324] BUG: Bad rss-counter state mm:00000000dcfe5138 type:MM_ANONPAGES val:22 [ 36.699294] BUG: Bad rss-counter state mm:0000000065a4f6e9 type:MM_FILEPAGES val:33 [ 36.700923] BUG: Bad rss-counter state mm:0000000065a4f6e9 type:MM_ANONPAGES val:22 Warning: Permanently added '[localhost]:25319' (ECDSA) to the list of known hosts. 2023/06/19 17:05:57 fuzzer started 2023/06/19 17:05:57 dialing manager at localhost:44161 2023/06/19 17:05:57 checking machine... 2023/06/19 17:05:57 checking revisions... [ 37.412572] kmemleak: Automatic memory scanning thread ended 2023/06/19 17:05:57 testing simple program... [ 37.465628] cgroup: Unknown subsys name 'net' [ 37.501874] cgroup: Unknown subsys name 'rlimit' executing program executing program executing program VM DIAGNOSIS: 17:05:55 Registers: info registers vcpu 0 RAX=0000000000000000 RBX=1ffff11002b01edb RCX=0000000000000000 RDX=ffff888015a7b680 RSI=ffffffff81c5f786 RDI=0000000000000006 RBP=ffff888010018000 RSP=ffff88801580f6a8 R8 =0000000000000006 R9 =0000000000001000 R10=0000000000003e9a R11=00000000000b6c88 R12=0000000000000003 R13=ffff8880165d3080 R14=0000000000000000 R15=0000000000001000 RIP=ffffffff81c5f786 RFL=00000293 [--S-A-C] 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 00007fb548703900 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=00007fb547b7de70 CR3=0000000009da6000 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=454d49544c4145525f454352554f535f XMM01=3d504d415453454d49545f454d49544c XMM02=ffffffffffffffffffffffffffffffff XMM03=2f6c616e72756f6a2f676f6c2f6e7572 XMM04=160a51a9706bddea00000000000ae988 XMM05=5d242099e904080900000000001352b8 XMM06=4fda316b135da52b00000000001340a8 XMM07=00000000000000000000000000000000 XMM08=415453454d49545f454d49544c414552 XMM09=00000000000000000000000000000000 XMM10=20200000000020202020202020200000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000 info registers vcpu 1 RAX=dffffc0000000000 RBX=ffff88800cac9b40 RCX=0000000000000000 RDX=1ffff11002b61f04 RSI=0000000000000008 RDI=ffff888015b0f820 RBP=ffff888015b0f800 RSP=ffff88800f18fa50 R8 =0000000000000000 R9 =fffffbfff0ba77da R10=ffffffff85d3bed7 R11=0000000000000000 R12=0000000000000000 R13=ffff88801a059500 R14=0000000000000000 R15=ffffffff8186cb26 RIP=ffffffff8182481d 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 00007ff449c97900 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=00007ffd33c5e000 CR3=000000000ea00000 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