syzkaller login: [ 39.263399] BUG: Bad rss-counter state mm:00000000d894f043 type:MM_FILEPAGES val:33 [ 39.264060] BUG: Bad rss-counter state mm:00000000d894f043 type:MM_ANONPAGES val:22 [ 39.449795] ================================================================== [ 39.450387] BUG: KASAN: slab-use-after-free in vma_interval_tree_remove+0xc75/0xec0 [ 39.458993] Read of size 8 at addr ffff88800df8b140 by task sshd/222 [ 39.459494] [ 39.459640] CPU: 0 PID: 222 Comm: sshd Not tainted 6.4.0-rc7-next-20230619 #1 [ 39.460196] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS 1.12.0-1 04/01/2014 [ 39.460821] Call Trace: [ 39.461030] [ 39.461219] dump_stack_lvl+0x91/0xf0 [ 39.461545] print_report+0xcc/0x620 [ 39.461868] ? __virt_addr_valid+0x102/0x340 [ 39.462231] ? vma_interval_tree_remove+0xc75/0xec0 [ 39.462631] ? vma_interval_tree_remove+0xc75/0xec0 [ 39.463100] kasan_report+0xbe/0xf0 [ 39.463410] ? vma_interval_tree_remove+0xc75/0xec0 [ 39.463819] vma_interval_tree_remove+0xc75/0xec0 [ 39.464253] vma_prepare+0xc54/0x11a0 [ 39.464571] __split_vma+0x5af/0x950 [ 39.464883] ? __pfx___split_vma+0x10/0x10 [ 39.465230] ? find_held_lock+0x2c/0x110 [ 39.465573] do_vmi_align_munmap+0x2ba/0x11f0 [ 39.465942] ? lock_is_held_type+0x9f/0x120 [ 39.466285] ? __pfx_do_vmi_align_munmap+0x10/0x10 [ 39.466680] ? mtree_range_walk+0x632/0x900 [ 39.467073] ? mas_walk+0x5c7/0x7c0 [ 39.467375] do_vmi_munmap+0x1f1/0x2b0 [ 39.467690] mmap_region+0x1f9/0x2660 [ 39.468000] ? vm_mmap_pgoff+0x15c/0x3a0 [ 39.468329] ? __pfx_arch_get_unmapped_area_topdown+0x10/0x10 [ 39.468784] ? __pfx_lock_acquire+0x10/0x10 [ 39.469125] ? __pfx_mmap_region+0x10/0x10 [ 39.469463] ? security_mmap_addr+0x7d/0xa0 [ 39.469800] ? get_unmapped_area+0x1f5/0x3f0 [ 39.470152] do_mmap+0x854/0xf00 [ 39.470437] vm_mmap_pgoff+0x1a6/0x3a0 [ 39.470757] ? __pfx_vm_mmap_pgoff+0x10/0x10 [ 39.471138] ksys_mmap_pgoff+0x3af/0x500 [ 39.471465] do_syscall_64+0x3f/0x90 [ 39.471771] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 39.472223] RIP: 0033:0x7f2169331d82 [ 39.472513] 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 [ 39.473860] RSP: 002b:00007ffd946a8528 EFLAGS: 00000206 ORIG_RAX: 0000000000000009 [ 39.474438] RAX: ffffffffffffffda RBX: 0000000000000812 RCX: 00007f2169331d82 [ 39.475043] RDX: 0000000000000005 RSI: 0000000000001000 RDI: 00007f216876b000 [ 39.475658] RBP: 00007f216876b000 R08: 0000000000000009 R09: 0000000000001000 [ 39.476319] R10: 0000000000000812 R11: 0000000000000206 R12: 000055c25726cb20 [ 39.476949] R13: 00007ffd946a8540 R14: 00007ffd946a8570 R15: 00007ffd946a88d0 [ 39.477579] [ 39.477796] [ 39.477951] Allocated by task 215: [ 39.478262] kasan_save_stack+0x22/0x50 [ 39.478633] kasan_set_track+0x25/0x30 [ 39.479008] __kasan_slab_alloc+0x59/0x70 [ 39.487029] kmem_cache_alloc+0x16b/0x370 [ 39.487413] vm_area_dup+0x20/0x160 [ 39.487750] __split_vma+0x170/0x950 [ 39.488127] split_vma+0xc6/0x110 [ 39.488447] mprotect_fixup+0x8d2/0xb30 [ 39.488814] do_mprotect_pkey+0x87e/0xd40 [ 39.489199] __x64_sys_mprotect+0x78/0xc0 [ 39.489585] do_syscall_64+0x3f/0x90 [ 39.489937] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 39.490406] [ 39.490564] Freed by task 13: [ 39.490851] kasan_save_stack+0x22/0x50 [ 39.491232] kasan_set_track+0x25/0x30 [ 39.491588] kasan_save_free_info+0x2b/0x50 [ 39.491986] __kasan_slab_free+0x10a/0x190 [ 39.492383] kmem_cache_free+0x10d/0x4d0 [ 39.492753] rcu_core+0x8c8/0x2860 [ 39.493086] __do_softirq+0x1b7/0x7d4 [ 39.493404] [ 39.493548] Last potentially related work creation: [ 39.493971] kasan_save_stack+0x22/0x50 [ 39.494306] __kasan_record_aux_stack+0x8e/0xa0 [ 39.494701] __call_rcu_common.constprop.0+0x6a/0xb90 [ 39.495197] remove_vma+0x139/0x170 [ 39.495528] do_vmi_align_munmap+0xd4a/0x11f0 [ 39.495940] do_vmi_munmap+0x1f1/0x2b0 [ 39.496300] __vm_munmap+0x138/0x3a0 [ 39.496647] __x64_sys_munmap+0x59/0x80 [ 39.497026] do_syscall_64+0x3f/0x90 [ 39.497377] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 39.497849] [ 39.498009] Second to last potentially related work creation: [ 39.498442] kasan_save_stack+0x22/0x50 [ 39.498769] __kasan_record_aux_stack+0x8e/0xa0 [ 39.499160] __call_rcu_common.constprop.0+0x6a/0xb90 [ 39.499580] remove_vma+0x139/0x170 [ 39.499869] do_vmi_align_munmap+0xd4a/0x11f0 [ 39.500235] do_vmi_munmap+0x1f1/0x2b0 [ 39.500555] mmap_region+0x1f9/0x2660 [ 39.500871] do_mmap+0x854/0xf00 [ 39.501154] vm_mmap_pgoff+0x1a6/0x3a0 [ 39.501478] ksys_mmap_pgoff+0x3af/0x500 [ 39.501807] do_syscall_64+0x3f/0x90 [ 39.502119] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 39.502542] [ 39.502686] The buggy address belongs to the object at ffff88800df8b0e8 [ 39.502686] which belongs to the cache vm_area_struct of size 168 [ 39.503633] The buggy address is located 88 bytes inside of [ 39.503633] freed 168-byte region [ffff88800df8b0e8, ffff88800df8b190) [ 39.504528] [ 39.504671] The buggy address belongs to the physical page: [ 39.505094] page:00000000f1e07a94 refcount:1 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0xdf8b [ 39.505785] memcg:ffff888010291f01 [ 39.506065] anon flags: 0x100000000000200(slab|node=0|zone=1) [ 39.506517] page_type: 0xffffffff() [ 39.506813] raw: 0100000000000200 ffff88800879fc80 ffffea0000396940 dead000000000005 [ 39.507430] raw: 0000000000000000 0000000000110011 00000001ffffffff ffff888010291f01 [ 39.508012] page dumped because: kasan: bad access detected [ 39.508438] [ 39.508580] Memory state around the buggy address: [ 39.508956] ffff88800df8b000: fa fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb [ 39.509508] ffff88800df8b080: fb fb fb fb fb fc fc fc fc fc fc fc fc fa fb fb [ 39.510085] >ffff88800df8b100: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb [ 39.510627] ^ [ 39.511094] ffff88800df8b180: fb fb fc fc fc fc fc fc fc fc 00 00 00 00 00 00 [ 39.511731] ffff88800df8b200: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 fc [ 39.512359] ================================================================== [ 39.513287] Disabling lock debugging due to kernel taint [ 43.410831] hrtimer: interrupt took 2540565 ns [ 43.421834] BUG: Bad rss-counter state mm:000000007a6b1339 type:MM_FILEPAGES val:33 [ 43.422598] BUG: Bad rss-counter state mm:000000007a6b1339 type:MM_ANONPAGES val:22 [ 44.500964] BUG: Bad rss-counter state mm:00000000f3b4cca4 type:MM_FILEPAGES val:33 [ 44.501698] BUG: Bad rss-counter state mm:00000000f3b4cca4 type:MM_ANONPAGES val:22 Warning: Permanently added '[localhost]:43115' (ECDSA) to the list of known hosts. 2023/06/20 08:07:01 fuzzer started 2023/06/20 08:07:01 dialing manager at localhost:44161 2023/06/20 08:07:01 checking machine... 2023/06/20 08:07:01 checking revisions... [ 45.521024] kmemleak: Automatic memory scanning thread ended 2023/06/20 08:07:01 testing simple program... [ 45.565857] cgroup: Unknown subsys name 'net' [ 45.658186] cgroup: Unknown subsys name 'rlimit' executing program executing program executing program VM DIAGNOSIS: 08:07:00 Registers: info registers vcpu 0 RAX=ffff8880166a8001 RBX=0000000000000001 RCX=0000000000000001 RDX=ffff8880166a7701 RSI=ffff8880166a77b0 RDI=ffff8880166a77c8 RBP=ffff8880166a77b0 RSP=ffff8880166a76d0 R8 =ffffffff8609675a R9 =0000000000000000 R10=0000000000038001 R11=0000000000006097 R12=0000000000000008 R13=ffff8880166a0000 R14=ffff8880166a77b8 R15=ffff8880166a77b8 RIP=ffffffff811304ce RFL=00000282 [--S----] 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=00007f2c4348c328 CR3=000000000ed1c000 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=0000000080000000 RBX=0000000000000004 RCX=ffffffff84496c1f RDX=000000000000000c RSI=0000000000000005 RDI=0000000000000000 RBP=dffffc0000000000 RSP=ffff888016787730 R8 =0000000000000000 R9 =0000000000000005 R10=000000000000000c R11=00000000000b6996 R12=ffff88801831e880 R13=000000000000000c R14=0000000000000005 R15=0000000000000020 RIP=ffffffff814c01d0 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 00007f5c71957900 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=00007f5c719576f8 CR3=000000000dab2000 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=ffffffffffff00000000000000000000 XMM02=ffffffffffff00000000000000000000 XMM03=00000000000000000000000000000000 XMM04=00000000000000000000000000000000 XMM05=00000000000000000000000000000000 XMM06=00000000000000000000000000000000 XMM07=00000000000000000000000000000000 XMM08=00000000000073707574726174732064 XMM09=00000000000000000000000000000000 XMM10=00000000000000000000000000000000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000