syzkaller login: [ 33.151612] BUG: Bad rss-counter state mm:000000007b9aa141 type:MM_FILEPAGES val:33 [ 33.152851] BUG: Bad rss-counter state mm:000000007b9aa141 type:MM_ANONPAGES val:22 [ 33.328025] ================================================================== [ 33.329152] BUG: KASAN: slab-use-after-free in vma_interval_tree_remove+0xc75/0xec0 [ 33.330286] Read of size 8 at addr ffff88800d57d3f8 by task sshd/221 [ 33.331380] [ 33.331644] CPU: 1 PID: 221 Comm: sshd Not tainted 6.4.0-rc7-next-20230619 #1 [ 33.332570] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS 1.12.0-1 04/01/2014 [ 33.333590] Call Trace: [ 33.333917] [ 33.334206] dump_stack_lvl+0x91/0xf0 [ 33.334719] print_report+0xcc/0x620 [ 33.335228] ? __virt_addr_valid+0x102/0x340 [ 33.335798] ? vma_interval_tree_remove+0xc75/0xec0 [ 33.336434] ? vma_interval_tree_remove+0xc75/0xec0 [ 33.337070] kasan_report+0xbe/0xf0 [ 33.337558] ? vma_interval_tree_remove+0xc75/0xec0 [ 33.338191] vma_interval_tree_remove+0xc75/0xec0 [ 33.338809] vma_prepare+0xc54/0x11a0 [ 33.339322] __split_vma+0x5af/0x950 [ 33.339813] ? __pfx___split_vma+0x10/0x10 [ 33.340359] ? find_held_lock+0x2c/0x110 [ 33.340897] do_vmi_align_munmap+0x2ba/0x11f0 [ 33.341474] ? lock_is_held_type+0x9f/0x120 [ 33.342023] ? __pfx_do_vmi_align_munmap+0x10/0x10 [ 33.342656] ? mtree_range_walk+0x632/0x900 [ 33.343249] ? mas_walk+0x5c7/0x7c0 [ 33.343738] do_vmi_munmap+0x1f1/0x2b0 [ 33.344248] mmap_region+0x1f9/0x2660 [ 33.344747] ? vm_mmap_pgoff+0x15c/0x3a0 [ 33.345271] ? __pfx_arch_get_unmapped_area_topdown+0x10/0x10 [ 33.346003] ? __pfx_lock_acquire+0x10/0x10 [ 33.346560] ? __pfx_mmap_region+0x10/0x10 [ 33.347114] ? security_mmap_addr+0x7d/0xa0 [ 33.347668] ? get_unmapped_area+0x1f5/0x3f0 [ 33.348235] do_mmap+0x854/0xf00 [ 33.348697] vm_mmap_pgoff+0x1a6/0x3a0 [ 33.349205] ? __pfx_vm_mmap_pgoff+0x10/0x10 [ 33.349784] ksys_mmap_pgoff+0x3af/0x500 [ 33.350314] do_syscall_64+0x3f/0x90 [ 33.350805] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 33.351488] RIP: 0033:0x7faaa4f68d82 [ 33.351963] 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 [ 33.354199] RSP: 002b:00007ffe7cc8a158 EFLAGS: 00000206 ORIG_RAX: 0000000000000009 [ 33.355155] RAX: ffffffffffffffda RBX: 0000000000000812 RCX: 00007faaa4f68d82 [ 33.356031] RDX: 0000000000000005 RSI: 0000000000001000 RDI: 00007faaa43a2000 [ 33.356907] RBP: 00007faaa43a2000 R08: 0000000000000009 R09: 0000000000001000 [ 33.357791] R10: 0000000000000812 R11: 0000000000000206 R12: 0000559af73ccec0 [ 33.358663] R13: 00007ffe7cc8a170 R14: 00007ffe7cc8a1a0 R15: 00007ffe7cc8a500 [ 33.359568] [ 33.359874] [ 33.360098] Allocated by task 214: [ 33.360541] kasan_save_stack+0x22/0x50 [ 33.361062] kasan_set_track+0x25/0x30 [ 33.361576] __kasan_slab_alloc+0x59/0x70 [ 33.362115] kmem_cache_alloc+0x16b/0x370 [ 33.362662] vm_area_dup+0x20/0x160 [ 33.363148] __split_vma+0x170/0x950 [ 33.363627] split_vma+0xc6/0x110 [ 33.364085] mprotect_fixup+0x8d2/0xb30 [ 33.364599] do_mprotect_pkey+0x87e/0xd40 [ 33.365136] __x64_sys_mprotect+0x78/0xc0 [ 33.365674] do_syscall_64+0x3f/0x90 [ 33.366167] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 33.366834] [ 33.367058] Freed by task 214: [ 33.367485] kasan_save_stack+0x22/0x50 [ 33.368011] kasan_set_track+0x25/0x30 [ 33.368524] kasan_save_free_info+0x2b/0x50 [ 33.369071] __kasan_slab_free+0x10a/0x190 [ 33.369625] kmem_cache_free+0x10d/0x4d0 [ 33.370150] rcu_core+0x8c8/0x2860 [ 33.370609] __do_softirq+0x1b7/0x7d4 [ 33.371107] [ 33.371330] Last potentially related work creation: [ 33.371994] kasan_save_stack+0x22/0x50 [ 33.372511] __kasan_record_aux_stack+0x8e/0xa0 [ 33.373101] __call_rcu_common.constprop.0+0x6a/0xb90 [ 33.373764] remove_vma+0x139/0x170 [ 33.374234] do_vmi_align_munmap+0xd4a/0x11f0 [ 33.374805] do_vmi_munmap+0x1f1/0x2b0 [ 33.375326] __vm_munmap+0x138/0x3a0 [ 33.375809] __x64_sys_munmap+0x59/0x80 [ 33.376328] do_syscall_64+0x3f/0x90 [ 33.376822] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 33.377487] [ 33.377709] The buggy address belongs to the object at ffff88800d57d3a0 [ 33.377709] which belongs to the cache vm_area_struct of size 168 [ 33.379272] The buggy address is located 88 bytes inside of [ 33.379272] freed 168-byte region [ffff88800d57d3a0, ffff88800d57d448) [ 33.380753] [ 33.380978] The buggy address belongs to the physical page: [ 33.381669] page:00000000b0e9c224 refcount:1 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0xd57d [ 33.382803] memcg:ffff88800c617201 [ 33.383248] flags: 0x100000000000200(slab|node=0|zone=1) [ 33.383893] page_type: 0xffffffff() [ 33.384349] raw: 0100000000000200 ffff88800879fc80 dead000000000122 0000000000000000 [ 33.385270] raw: 0000000000000000 0000000000110011 00000001ffffffff ffff88800c617201 [ 33.386193] page dumped because: kasan: bad access detected [ 33.386867] [ 33.387102] Memory state around the buggy address: [ 33.387691] ffff88800d57d280: fc fc fc fc fc fc fc 00 00 00 00 00 00 00 00 00 [ 33.388556] ffff88800d57d300: 00 00 00 00 00 00 00 00 00 00 00 00 fc fc fc fc [ 33.389414] >ffff88800d57d380: fc fc fc fc fa fb fb fb fb fb fb fb fb fb fb fb [ 33.390269] ^ [ 33.391118] ffff88800d57d400: fb fb fb fb fb fb fb fb fb fc fc fc fc fc fc fc [ 33.391981] ffff88800d57d480: fc fa fb fb fb fb fb fb fb fb fb fb fb fb fb fb [ 33.392838] ================================================================== [ 33.393763] Disabling lock debugging due to kernel taint [ 35.791556] BUG: Bad rss-counter state mm:000000007edec1c0 type:MM_FILEPAGES val:33 [ 35.792738] BUG: Bad rss-counter state mm:000000007edec1c0 type:MM_ANONPAGES val:22 [ 36.239663] BUG: Bad rss-counter state mm:00000000f843efe4 type:MM_FILEPAGES val:33 [ 36.240653] BUG: Bad rss-counter state mm:00000000f843efe4 type:MM_ANONPAGES val:22 Warning: Permanently added '[localhost]:12021' (ECDSA) to the list of known hosts. 2023/06/19 21:29:15 fuzzer started 2023/06/19 21:29:15 dialing manager at localhost:44161 2023/06/19 21:29:15 checking machine... 2023/06/19 21:29:15 checking revisions... [ 36.975631] kmemleak: Automatic memory scanning thread ended 2023/06/19 21:29:16 testing simple program... [ 37.022123] cgroup: Unknown subsys name 'net' [ 37.063448] cgroup: Unknown subsys name 'rlimit' executing program executing program executing program VM DIAGNOSIS: 21:29:12 Registers: info registers vcpu 0 RAX=0000000080000000 RBX=ffffffff87f94640 RCX=0000000000000000 RDX=ffff88800d88b680 RSI=ffffffff83c632e5 RDI=0000000000000005 RBP=0000000000000000 RSP=ffff888019ccf6a0 R8 =0000000000000005 R9 =00000000000000ff R10=00000000000000ff R11=00000a7100000a71 R12=0000000000000000 R13=00000000000000ff R14=dffffc0000000000 R15=0000000000000001 RIP=ffffffff814c07eb 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 00007f603d106900 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=00007fff5a14d000 CR3=000000000ef62000 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=74696d7265705f6d61703d73726f746e XMM02=000000000000000000000000000000ff XMM03=5320444f4854454d5f54505952434e45 XMM04=40404040404040404040404040404040 XMM05=5a5a5a5a5a5a5a5a5a5a5a5a5a5a5a5a XMM06=20202020202020202020202020202020 XMM07=00000000000000000000000000000000 XMM08=61662029286e65706f5f746964756100 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=00007f9776f3b670 CR3=000000000eafa000 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=2035313a39323a3132203931206e754a XMM01=73732878696e755f6d6170203a5d3033 XMM02=65736f6c63206e6f6973736573203a29 XMM03=755f6d6170203a5d3033325b64687373 XMM04=69662068637573206f4e203a656c6163 XMM05=3a656c696620766e65206e65706f206f XMM06=65733a6468737328766e655f6d617020 XMM07=6b7a79732035313a39323a3132203931 XMM08=3d656e696c646d632022656369767265 XMM09=00000000000000000000000000000000 XMM10=00000000000000000000000000000000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000