syzkaller login: [ 31.339627] BUG: Bad rss-counter state mm:00000000fdb010fd type:MM_FILEPAGES val:33 [ 31.340931] BUG: Bad rss-counter state mm:00000000fdb010fd type:MM_ANONPAGES val:22 [ 31.376832] ================================================================== [ 31.377956] BUG: KASAN: slab-use-after-free in vma_interval_tree_remove+0xc75/0xec0 [ 31.378996] Read of size 8 at addr ffff888010283a50 by task sshd/221 [ 31.379856] [ 31.380102] CPU: 1 PID: 221 Comm: sshd Not tainted 6.4.0-rc7-next-20230620 #1 [ 31.381068] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS 1.12.0-1 04/01/2014 [ 31.382195] Call Trace: [ 31.382554] [ 31.382872] dump_stack_lvl+0x91/0xf0 [ 31.383421] print_report+0xcc/0x620 [ 31.383960] ? __virt_addr_valid+0x102/0x340 [ 31.384576] ? vma_interval_tree_remove+0xc75/0xec0 [ 31.385272] ? vma_interval_tree_remove+0xc75/0xec0 [ 31.385955] kasan_report+0xbe/0xf0 [ 31.386521] ? vma_interval_tree_remove+0xc75/0xec0 [ 31.387267] vma_interval_tree_remove+0xc75/0xec0 [ 31.387985] vma_prepare+0xc54/0x11a0 [ 31.388558] __split_vma+0x5af/0x950 [ 31.389139] ? __pfx___split_vma+0x10/0x10 [ 31.389779] ? find_held_lock+0x2c/0x110 [ 31.390406] do_vmi_align_munmap+0x2ba/0x11f0 [ 31.391083] ? lock_is_held_type+0x9f/0x120 [ 31.391677] ? __pfx_do_vmi_align_munmap+0x10/0x10 [ 31.392337] ? mtree_range_walk+0x632/0x900 [ 31.392941] ? mas_walk+0x5c7/0x7c0 [ 31.393474] do_vmi_munmap+0x1f1/0x2b0 [ 31.394018] mmap_region+0x1f9/0x2660 [ 31.394545] ? vm_mmap_pgoff+0x15c/0x3a0 [ 31.395079] ? __pfx_arch_get_unmapped_area_topdown+0x10/0x10 [ 31.395819] ? __pfx_lock_acquire+0x10/0x10 [ 31.396372] ? __pfx_mmap_region+0x10/0x10 [ 31.396927] ? security_mmap_addr+0x7d/0xa0 [ 31.397490] ? get_unmapped_area+0x1f5/0x3f0 [ 31.398059] do_mmap+0x854/0xf00 [ 31.398519] vm_mmap_pgoff+0x1a6/0x3a0 [ 31.399034] ? __pfx_vm_mmap_pgoff+0x10/0x10 [ 31.399618] ksys_mmap_pgoff+0x3af/0x500 [ 31.400148] do_syscall_64+0x3f/0x90 [ 31.400647] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 31.401340] RIP: 0033:0x7fabdd97cd82 [ 31.401819] 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 [ 31.404054] RSP: 002b:00007ffcdb24f608 EFLAGS: 00000206 ORIG_RAX: 0000000000000009 [ 31.405179] RAX: ffffffffffffffda RBX: 0000000000000812 RCX: 00007fabdd97cd82 [ 31.406058] RDX: 0000000000000005 RSI: 0000000000001000 RDI: 00007fabdcdb6000 [ 31.406963] RBP: 00007fabdcdb6000 R08: 0000000000000009 R09: 0000000000001000 [ 31.407844] R10: 0000000000000812 R11: 0000000000000206 R12: 000055e130104ec0 [ 31.408720] R13: 00007ffcdb24f620 R14: 00007ffcdb24f650 R15: 00007ffcdb24f9b0 [ 31.409628] [ 31.409932] [ 31.410157] Allocated by task 214: [ 31.410608] kasan_save_stack+0x22/0x50 [ 31.411140] kasan_set_track+0x25/0x30 [ 31.411646] __kasan_slab_alloc+0x59/0x70 [ 31.412194] kmem_cache_alloc+0x16b/0x370 [ 31.412728] vm_area_dup+0x20/0x160 [ 31.413212] __split_vma+0x170/0x950 [ 31.413690] split_vma+0xc6/0x110 [ 31.414143] mprotect_fixup+0x8d2/0xb30 [ 31.414661] do_mprotect_pkey+0x87e/0xd40 [ 31.415195] __x64_sys_mprotect+0x78/0xc0 [ 31.415739] do_syscall_64+0x3f/0x90 [ 31.416235] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 31.416907] [ 31.417145] Freed by task 13: [ 31.417545] kasan_save_stack+0x22/0x50 [ 31.418063] kasan_set_track+0x25/0x30 [ 31.418588] kasan_save_free_info+0x2b/0x50 [ 31.419141] __kasan_slab_free+0x10a/0x190 [ 31.419692] kmem_cache_free+0x10d/0x4d0 [ 31.420218] rcu_core+0x8c8/0x2860 [ 31.420675] __do_softirq+0x1b7/0x7d4 [ 31.421188] [ 31.421414] Last potentially related work creation: [ 31.422028] kasan_save_stack+0x22/0x50 [ 31.422553] __kasan_record_aux_stack+0x8e/0xa0 [ 31.423145] __call_rcu_common.constprop.0+0x6a/0xb90 [ 31.423810] remove_vma+0x139/0x170 [ 31.424272] do_vmi_align_munmap+0xd4a/0x11f0 [ 31.424856] do_vmi_munmap+0x1f1/0x2b0 [ 31.425381] __vm_munmap+0x138/0x3a0 [ 31.425866] __x64_sys_munmap+0x59/0x80 [ 31.426378] do_syscall_64+0x3f/0x90 [ 31.426869] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 31.427532] [ 31.427752] Second to last potentially related work creation: [ 31.428463] kasan_save_stack+0x22/0x50 [ 31.428987] __kasan_record_aux_stack+0x8e/0xa0 [ 31.429594] __call_rcu_common.constprop.0+0x6a/0xb90 [ 31.430259] remove_vma+0x139/0x170 [ 31.430725] do_vmi_align_munmap+0xd4a/0x11f0 [ 31.431303] do_vmi_munmap+0x1f1/0x2b0 [ 31.431805] __vm_munmap+0x138/0x3a0 [ 31.432297] __x64_sys_munmap+0x59/0x80 [ 31.432810] do_syscall_64+0x3f/0x90 [ 31.433305] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 31.433978] [ 31.434200] The buggy address belongs to the object at ffff8880102839f8 [ 31.434200] which belongs to the cache vm_area_struct of size 168 [ 31.435751] The buggy address is located 88 bytes inside of [ 31.435751] freed 168-byte region [ffff8880102839f8, ffff888010283aa0) [ 31.437215] [ 31.437439] The buggy address belongs to the physical page: [ 31.438123] page:000000007eb557ff refcount:1 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0x10283 [ 31.439268] memcg:ffff888019e9cd01 [ 31.439708] flags: 0x100000000000200(slab|node=0|zone=1) [ 31.440379] page_type: 0xffffffff() [ 31.440846] raw: 0100000000000200 ffff8880087a0c80 ffffea0000404940 dead000000000004 [ 31.441807] raw: 0000000000000000 0000000000110011 00000001ffffffff ffff888019e9cd01 [ 31.442753] page dumped because: kasan: bad access detected [ 31.443443] [ 31.443668] Memory state around the buggy address: [ 31.444271] ffff888010283900: fc fc fa fb fb fb fb fb fb fb fb fb fb fb fb fb [ 31.445168] ffff888010283980: fb fb fb fb fb fb fb fc fc fc fc fc fc fc fc fa [ 31.446066] >ffff888010283a00: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb [ 31.446951] ^ [ 31.447673] ffff888010283a80: fb fb fb fb fc fc fc fc fc fc fc fc fa fb fb fb [ 31.448611] ffff888010283b00: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb [ 31.449514] ================================================================== [ 31.450596] Disabling lock debugging due to kernel taint [ 34.143453] BUG: Bad rss-counter state mm:0000000099070baf type:MM_FILEPAGES val:33 [ 34.144553] BUG: Bad rss-counter state mm:0000000099070baf type:MM_ANONPAGES val:22 [ 34.528091] BUG: Bad rss-counter state mm:00000000bbc5cd28 type:MM_FILEPAGES val:33 [ 34.529202] BUG: Bad rss-counter state mm:00000000bbc5cd28 type:MM_ANONPAGES val:22 Warning: Permanently added '[localhost]:29667' (ECDSA) to the list of known hosts. 2023/06/21 01:39:26 fuzzer started 2023/06/21 01:39:27 dialing manager at localhost:36067 2023/06/21 01:39:27 checking machine... 2023/06/21 01:39:27 checking revisions... [ 35.243159] kmemleak: Automatic memory scanning thread ended 2023/06/21 01:39:27 testing simple program... [ 35.280100] cgroup: Unknown subsys name 'net' [ 35.334124] cgroup: Unknown subsys name 'rlimit' executing program executing program executing program VM DIAGNOSIS: 01:39:26 Registers: info registers vcpu 0 RAX=0000000000000000 RBX=0000000000000000 RCX=0000000000000000 RDX=ffff888015b51b40 RSI=ffffffff81c5ee63 RDI=0000000000000005 RBP=ffff8880162d8780 RSP=ffff88801a0c7758 R8 =0000000000000005 R9 =0000000000000000 R10=0000000000000000 R11=00000000000b6a61 R12=0000000000000001 R13=ffff88801ba34948 R14=ffff88801623c960 R15=ffff8880162d8780 RIP=ffffffff814c089b 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 00007f610ffff700 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=00007fa19f85a618 CR3=000000000e01e000 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=2036323a39333a3130203132206e754a XMM01=73732878696e755f6d6170203a5d3033 XMM02=65736f6c63206e6f6973736573203a29 XMM03=755f6d6170203a5d3033325b64687373 XMM04=69662068637573206f4e203a656c6163 XMM05=3a656c696620766e65206e65706f206f XMM06=65733a6468737328766e655f6d617020 XMM07=6b7a79732036323a39333a3130203132 XMM08=3d656e696c646d632022656369767265 XMM09=00000000000000000000000000000000 XMM10=00000000000000000000000000000000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000 info registers vcpu 1 RAX=ffff88806cf35000 RBX=0000000000000001 RCX=ffffffff8451250e RDX=ffffed100d9e6a01 RSI=0000000000000004 RDI=ffffffff81288ac5 RBP=dffffc0000000000 RSP=ffff888008e07e70 R8 =0000000000000000 R9 =ffffed100d9e6a00 R10=ffff88806cf35003 R11=ffff888008c04400 R12=ffffffff85d3d350 R13=1ffff110011c0fd3 R14=0000000000000000 R15=0000000000000000 RIP=ffffffff8451349f 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=00007f2619864018 CR3=000000000d81c000 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=9da66c84e2c17d8dc2458264ee08c28f XMM02=000000000011a5e0ec2efd57dc4c00df XMM03=0000000000121a487e34cf4a9cae8d94 XMM04=40e1ef4a1ed3ec0b00000000000ae988 XMM05=e4cb8bb95a7664b60000000000132998 XMM06=c291bd5c70af25b90000000000132820 XMM07=e042d86d42eb936e0000000000121cc8 XMM08=7e34cf4a9cae8d94000000000011a640 XMM09=00000000000000000000000000000000 XMM10=20200000000020202020202020200000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000