syzkaller login: [ 63.768605] BUG: Bad rss-counter state mm:000000006160d603 type:MM_FILEPAGES val:33 [ 63.769812] BUG: Bad rss-counter state mm:000000006160d603 type:MM_ANONPAGES val:22 [ 63.873962] ================================================================== [ 63.874887] BUG: KASAN: slab-use-after-free in vma_interval_tree_remove+0xc75/0xec0 [ 63.875834] Read of size 8 at addr ffff88800cac4310 by task sshd/222 [ 63.876606] [ 63.876921] CPU: 1 PID: 222 Comm: sshd Not tainted 6.4.0-rc7-next-20230619 #1 [ 63.877812] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS 1.12.0-1 04/01/2014 [ 63.878792] Call Trace: [ 63.879115] [ 63.879426] dump_stack_lvl+0x91/0xf0 [ 63.879937] print_report+0xcc/0x620 [ 63.880429] ? __virt_addr_valid+0x102/0x340 [ 63.880989] ? vma_interval_tree_remove+0xc75/0xec0 [ 63.881614] ? vma_interval_tree_remove+0xc75/0xec0 [ 63.882241] kasan_report+0xbe/0xf0 [ 63.882722] ? vma_interval_tree_remove+0xc75/0xec0 [ 63.883349] vma_interval_tree_remove+0xc75/0xec0 [ 63.883969] vma_prepare+0xc54/0x11a0 [ 63.884474] __split_vma+0x5af/0x950 [ 63.884972] ? __pfx___split_vma+0x10/0x10 [ 63.885535] ? find_held_lock+0x2c/0x110 [ 63.886097] do_vmi_align_munmap+0x2ba/0x11f0 [ 63.886710] ? lock_is_held_type+0x9f/0x120 [ 63.887298] ? __pfx_do_vmi_align_munmap+0x10/0x10 [ 63.887982] ? mtree_range_walk+0x632/0x900 [ 63.888577] ? mas_walk+0x5c7/0x7c0 [ 63.889085] do_vmi_munmap+0x1f1/0x2b0 [ 63.889627] mmap_region+0x1f9/0x2660 [ 63.890149] ? vm_mmap_pgoff+0x15c/0x3a0 [ 63.890695] ? __pfx_arch_get_unmapped_area_topdown+0x10/0x10 [ 63.891472] ? __pfx_lock_acquire+0x10/0x10 [ 63.892065] ? __pfx_mmap_region+0x10/0x10 [ 63.892643] ? security_mmap_addr+0x7d/0xa0 [ 63.893222] ? get_unmapped_area+0x1f5/0x3f0 [ 63.893825] do_mmap+0x854/0xf00 [ 63.894292] vm_mmap_pgoff+0x1a6/0x3a0 [ 63.894824] ? __pfx_vm_mmap_pgoff+0x10/0x10 [ 63.895428] ksys_mmap_pgoff+0x3af/0x500 [ 63.895988] do_syscall_64+0x3f/0x90 [ 63.896493] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 63.897194] RIP: 0033:0x7f5643be3d82 [ 63.897690] 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 [ 63.900021] RSP: 002b:00007ffeb987e9b8 EFLAGS: 00000206 ORIG_RAX: 0000000000000009 [ 63.900981] RAX: ffffffffffffffda RBX: 0000000000000812 RCX: 00007f5643be3d82 [ 63.901909] RDX: 0000000000000005 RSI: 0000000000001000 RDI: 00007f564301d000 [ 63.902834] RBP: 00007f564301d000 R08: 0000000000000009 R09: 0000000000001000 [ 63.903770] R10: 0000000000000812 R11: 0000000000000206 R12: 000055baf57fbf60 [ 63.904697] R13: 00007ffeb987e9d0 R14: 00007ffeb987ea00 R15: 00007ffeb987ed60 [ 63.905642] [ 63.905961] [ 63.906193] Allocated by task 215: [ 63.906666] kasan_save_stack+0x22/0x50 [ 63.907200] kasan_set_track+0x25/0x30 [ 63.907725] __kasan_slab_alloc+0x59/0x70 [ 63.908324] kmem_cache_alloc+0x16b/0x370 [ 63.908892] vm_area_dup+0x20/0x160 [ 63.909383] __split_vma+0x170/0x950 [ 63.909893] split_vma+0xc6/0x110 [ 63.910370] mprotect_fixup+0x8d2/0xb30 [ 63.910922] do_mprotect_pkey+0x87e/0xd40 [ 63.911496] __x64_sys_mprotect+0x78/0xc0 [ 63.912066] do_syscall_64+0x3f/0x90 [ 63.912568] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 63.913256] [ 63.913492] Freed by task 215: [ 63.913915] kasan_save_stack+0x22/0x50 [ 63.914460] kasan_set_track+0x25/0x30 [ 63.914985] kasan_save_free_info+0x2b/0x50 [ 63.915559] __kasan_slab_free+0x10a/0x190 [ 63.916143] kmem_cache_free+0x10d/0x4d0 [ 63.916698] rcu_core+0x8c8/0x2860 [ 63.917181] __do_softirq+0x1b7/0x7d4 [ 63.917687] [ 63.917922] Last potentially related work creation: [ 63.918621] kasan_save_stack+0x22/0x50 [ 63.919157] __kasan_record_aux_stack+0x8e/0xa0 [ 63.919791] __call_rcu_common.constprop.0+0x6a/0xb90 [ 63.920498] remove_vma+0x139/0x170 [ 63.920976] do_vmi_align_munmap+0xd4a/0x11f0 [ 63.921567] do_vmi_munmap+0x1f1/0x2b0 [ 63.922096] __vm_munmap+0x138/0x3a0 [ 63.922602] __x64_sys_munmap+0x59/0x80 [ 63.923126] do_syscall_64+0x3f/0x90 [ 63.923645] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 63.924334] [ 63.924563] The buggy address belongs to the object at ffff88800cac42b8 [ 63.924563] which belongs to the cache vm_area_struct of size 168 [ 63.926160] The buggy address is located 88 bytes inside of [ 63.926160] freed 168-byte region [ffff88800cac42b8, ffff88800cac4360) [ 63.927701] [ 63.927946] The buggy address belongs to the physical page: [ 63.928652] page:0000000006ce5774 refcount:1 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0xcac4 [ 63.929846] memcg:ffff88800ed0ec01 [ 63.930313] flags: 0x100000000000200(slab|node=0|zone=1) [ 63.931028] page_type: 0xffffffff() [ 63.931558] raw: 0100000000000200 ffff88800879fc80 dead000000000122 0000000000000000 [ 63.932554] raw: 0000000000000000 0000000000110011 00000001ffffffff ffff88800ed0ec01 [ 63.933515] page dumped because: kasan: bad access detected [ 63.934209] [ 63.934437] Memory state around the buggy address: [ 63.935133] ffff88800cac4200: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 fc [ 63.936091] ffff88800cac4280: fc fc fc fc fc fc fc fa fb fb fb fb fb fb fb fb [ 63.937070] >ffff88800cac4300: fb fb fb fb fb fb fb fb fb fb fb fb fc fc fc fc [ 63.938014] ^ [ 63.938527] ffff88800cac4380: fc fc fc fc fa fb fb fb fb fb fb fb fb fb fb fb [ 63.939486] ffff88800cac4400: fb fb fb fb fb fb fb fb fb fc fc fc fc fc fc fc [ 63.940443] ================================================================== [ 63.941735] Disabling lock debugging due to kernel taint [ 65.876957] BUG: Bad rss-counter state mm:00000000c0fadee9 type:MM_FILEPAGES val:33 [ 65.878138] BUG: Bad rss-counter state mm:00000000c0fadee9 type:MM_ANONPAGES val:22 [ 66.352083] BUG: Bad rss-counter state mm:00000000d0e2e853 type:MM_FILEPAGES val:33 [ 66.353096] BUG: Bad rss-counter state mm:00000000d0e2e853 type:MM_ANONPAGES val:22 Warning: Permanently added '[localhost]:22523' (ECDSA) to the list of known hosts. 2023/06/20 05:18:05 fuzzer started 2023/06/20 05:18:05 dialing manager at localhost:44161 2023/06/20 05:18:06 checking machine... 2023/06/20 05:18:06 checking revisions... [ 67.082467] kmemleak: Automatic memory scanning thread ended 2023/06/20 05:18:06 testing simple program... [ 67.135176] cgroup: Unknown subsys name 'net' [ 67.192568] cgroup: Unknown subsys name 'rlimit' executing program executing program executing program VM DIAGNOSIS: 05:18:03 Registers: info registers vcpu 0 RAX=0000000000000000 RBX=ffff88800ef44ec0 RCX=0000000000000000 RDX=ffff8880162ed1c0 RSI=ffffffff838696fc RDI=0000000000000005 RBP=ffff88800efc0000 RSP=ffff8880182b7828 R8 =0000000000000005 R9 =0000000000000000 R10=000000000000000c R11=00000000000b6996 R12=ffff88800e2fea00 R13=ffff88800efc057c R14=ffff88800efc0579 R15=ffff88800efc0600 RIP=ffffffff814c081b 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 00007fd61de90900 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=00007fd61e447618 CR3=0000000009a58000 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=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=00007fa67d731b70 CR3=0000000009030000 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=2c5420494d94888a5048228a08bc5d5b XMM02=000000000011ce28ec2efd57dc4c00df XMM03=00000000001242c8c346e9b7523ae385 XMM04=cf7cc6c4b29d7ed900000000000ae988 XMM05=59d5b690e0af863b0000000000133eb8 XMM06=00c3ffa147b8d8570000000000133d40 XMM07=e042d86d42eb936e0000000000124548 XMM08=c346e9b7523ae385000000000011ce88 XMM09=00000000000000000000000000000000 XMM10=20200000000020202020202020200000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000