syzkaller login: [ 34.331090] BUG: Bad rss-counter state mm:00000000591a5c23 type:MM_FILEPAGES val:33 [ 34.332069] BUG: Bad rss-counter state mm:00000000591a5c23 type:MM_ANONPAGES val:22 [ 34.491175] ================================================================== [ 34.492106] BUG: KASAN: slab-use-after-free in vma_interval_tree_remove+0xc75/0xec0 [ 34.493061] Read of size 8 at addr ffff88800fe0b3f8 by task sshd/219 [ 34.493826] [ 34.494042] CPU: 1 PID: 219 Comm: sshd Not tainted 6.4.0-rc7-next-20230619 #1 [ 34.495028] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS 1.12.0-1 04/01/2014 [ 34.496019] Call Trace: [ 34.496365] [ 34.496673] dump_stack_lvl+0x91/0xf0 [ 34.497172] print_report+0xcc/0x620 [ 34.497654] ? __virt_addr_valid+0x102/0x340 [ 34.498207] ? vma_interval_tree_remove+0xc75/0xec0 [ 34.498834] ? vma_interval_tree_remove+0xc75/0xec0 [ 34.499455] kasan_report+0xbe/0xf0 [ 34.499935] ? vma_interval_tree_remove+0xc75/0xec0 [ 34.500563] vma_interval_tree_remove+0xc75/0xec0 [ 34.501176] vma_prepare+0xc54/0x11a0 [ 34.501654] __split_vma+0x5af/0x950 [ 34.502137] ? __pfx___split_vma+0x10/0x10 [ 34.502660] ? find_held_lock+0x2c/0x110 [ 34.503177] do_vmi_align_munmap+0x2ba/0x11f0 [ 34.503741] ? lock_is_held_type+0x9f/0x120 [ 34.504300] ? __pfx_do_vmi_align_munmap+0x10/0x10 [ 34.504910] ? mtree_range_walk+0x632/0x900 [ 34.505458] ? mas_walk+0x5c7/0x7c0 [ 34.505926] do_vmi_munmap+0x1f1/0x2b0 [ 34.506425] mmap_region+0x1f9/0x2660 [ 34.506908] ? vm_mmap_pgoff+0x15c/0x3a0 [ 34.507415] ? __pfx_arch_get_unmapped_area_topdown+0x10/0x10 [ 34.508119] ? __pfx_lock_acquire+0x10/0x10 [ 34.508663] ? __pfx_mmap_region+0x10/0x10 [ 34.509192] ? security_mmap_addr+0x7d/0xa0 [ 34.509719] ? get_unmapped_area+0x1f5/0x3f0 [ 34.510266] do_mmap+0x854/0xf00 [ 34.510712] vm_mmap_pgoff+0x1a6/0x3a0 [ 34.511201] ? __pfx_vm_mmap_pgoff+0x10/0x10 [ 34.511758] ksys_mmap_pgoff+0x3af/0x500 [ 34.512265] do_syscall_64+0x3f/0x90 [ 34.512752] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 34.513398] RIP: 0033:0x7f1f80b21d82 [ 34.513853] 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 [ 34.515992] RSP: 002b:00007ffd28268e28 EFLAGS: 00000206 ORIG_RAX: 0000000000000009 [ 34.516909] RAX: ffffffffffffffda RBX: 0000000000000812 RCX: 00007f1f80b21d82 [ 34.517752] RDX: 0000000000000005 RSI: 0000000000001000 RDI: 00007f1f7ff5b000 [ 34.518591] RBP: 00007f1f7ff5b000 R08: 0000000000000009 R09: 0000000000001000 [ 34.519436] R10: 0000000000000812 R11: 0000000000000206 R12: 000055b79f3aaec0 [ 34.520291] R13: 00007ffd28268e40 R14: 00007ffd28268e70 R15: 00007ffd282691d0 [ 34.521153] [ 34.521442] [ 34.521656] Allocated by task 212: [ 34.522084] kasan_save_stack+0x22/0x50 [ 34.522583] kasan_set_track+0x25/0x30 [ 34.523071] __kasan_slab_alloc+0x59/0x70 [ 34.523587] kmem_cache_alloc+0x16b/0x370 [ 34.524105] vm_area_dup+0x20/0x160 [ 34.524573] __split_vma+0x170/0x950 [ 34.525034] split_vma+0xc6/0x110 [ 34.525480] mprotect_fixup+0x8d2/0xb30 [ 34.525981] do_mprotect_pkey+0x87e/0xd40 [ 34.526503] __x64_sys_mprotect+0x78/0xc0 [ 34.527035] do_syscall_64+0x3f/0x90 [ 34.527518] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 34.528160] [ 34.528391] Freed by task 19: [ 34.528785] kasan_save_stack+0x22/0x50 [ 34.529286] kasan_set_track+0x25/0x30 [ 34.529786] kasan_save_free_info+0x2b/0x50 [ 34.530316] __kasan_slab_free+0x10a/0x190 [ 34.530847] kmem_cache_free+0x10d/0x4d0 [ 34.531351] rcu_core+0x8c8/0x2860 [ 34.531801] __do_softirq+0x1b7/0x7d4 [ 34.532270] [ 34.532507] Last potentially related work creation: [ 34.533084] kasan_save_stack+0x22/0x50 [ 34.533589] __kasan_record_aux_stack+0x8e/0xa0 [ 34.534164] __call_rcu_common.constprop.0+0x6a/0xb90 [ 34.534806] remove_vma+0x139/0x170 [ 34.535257] do_vmi_align_munmap+0xd4a/0x11f0 [ 34.535873] do_vmi_munmap+0x1f1/0x2b0 [ 34.536369] __vm_munmap+0x138/0x3a0 [ 34.536830] __x64_sys_munmap+0x59/0x80 [ 34.537324] do_syscall_64+0x3f/0x90 [ 34.537791] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 34.538429] [ 34.538645] The buggy address belongs to the object at ffff88800fe0b3a0 [ 34.538645] which belongs to the cache vm_area_struct of size 168 [ 34.540096] The buggy address is located 88 bytes inside of [ 34.540096] freed 168-byte region [ffff88800fe0b3a0, ffff88800fe0b448) [ 34.541507] [ 34.541721] The buggy address belongs to the physical page: [ 34.542380] page:0000000010a1d4ad refcount:1 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0xfe0b [ 34.543460] memcg:ffff8880181e9201 [ 34.543883] flags: 0x100000000000200(slab|node=0|zone=1) [ 34.544538] page_type: 0xffffffff() [ 34.544984] raw: 0100000000000200 ffff88800879fc80 dead000000000122 0000000000000000 [ 34.545891] raw: 0000000000000000 0000000000110011 00000001ffffffff ffff8880181e9201 [ 34.546790] page dumped because: kasan: bad access detected [ 34.547445] [ 34.547659] Memory state around the buggy address: [ 34.548236] ffff88800fe0b280: fc fc fc fc fc fc fc 00 00 00 00 00 00 00 00 00 [ 34.549106] ffff88800fe0b300: 00 00 00 00 00 00 00 00 00 00 00 00 fc fc fc fc [ 34.549958] >ffff88800fe0b380: fc fc fc fc fa fb fb fb fb fb fb fb fb fb fb fb [ 34.550805] ^ [ 34.551642] ffff88800fe0b400: fb fb fb fb fb fb fb fb fb fc fc fc fc fc fc fc [ 34.552506] ffff88800fe0b480: fc fa fb fb fb fb fb fb fb fb fb fb fb fb fb fb [ 34.553353] ================================================================== [ 34.554272] Disabling lock debugging due to kernel taint [ 36.842631] BUG: Bad rss-counter state mm:00000000d3f8ce85 type:MM_FILEPAGES val:33 [ 36.843584] BUG: Bad rss-counter state mm:00000000d3f8ce85 type:MM_ANONPAGES val:22 [ 37.367376] BUG: Bad rss-counter state mm:0000000096e059bd type:MM_FILEPAGES val:33 [ 37.368629] BUG: Bad rss-counter state mm:0000000096e059bd type:MM_ANONPAGES val:22 Warning: Permanently added '[localhost]:34482' (ECDSA) to the list of known hosts. 2023/06/20 05:08:03 fuzzer started 2023/06/20 05:08:03 dialing manager at localhost:44161 2023/06/20 05:08:03 checking machine... 2023/06/20 05:08:03 checking revisions... [ 38.054894] kmemleak: Automatic memory scanning thread ended 2023/06/20 05:08:04 testing simple program... [ 38.117099] cgroup: Unknown subsys name 'net' [ 38.171511] cgroup: Unknown subsys name 'rlimit' executing program executing program executing program VM DIAGNOSIS: 05:08:00 Registers: info registers vcpu 0 RAX=ffff88806c400000 RBX=000000004b2d0cfa RCX=ffff88806ca867d0 RDX=000000000000000e RSI=0000000000000001 RDI=0000000066983fdf RBP=ffff88800f50e7e0 RSP=ffff888016a4f618 R8 =000000005052a211 R9 =fffffbfff0ba77da R10=ffffffff85d3bed7 R11=00000000000b6996 R12=0000000000000001 R13=0000000000000000 R14=ffff888016a4f680 R15=000000000000000e RIP=ffffffff82270f13 RFL=00000206 [-----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 00007fb9f3f58900 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=00007fb9f450f618 CR3=000000000eb6c000 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=0000560e38146a50 RBX=0000000000000001 RCX=0000000000000000 RDX=0000560e3814eee0 RSI=0000000000000000 RDI=0000560e3730f238 RBP=0000560e3730e908 RSP=00007f38b24fda80 R8 =0000000000000000 R9 =0000000000000000 R10=0000000000000000 R11=0000000000000000 R12=0000560e38141e00 R13=0000560e3732d004 R14=0000560e381465c0 R15=0000560e38141e30 RIP=0000560e372e636b RFL=00000246 [---Z-P-] CPL=3 II=0 A20=1 SMM=0 HLT=0 ES =0000 0000000000000000 00000000 00000000 CS =0033 0000000000000000 ffffffff 00a0fb00 DPL=3 CS64 [-RA] SS =002b 0000000000000000 ffffffff 00c0f300 DPL=3 DS [-WA] DS =0000 0000000000000000 00000000 00000000 FS =0000 00007f38b24fe700 00000000 00000000 GS =0000 0000000000000000 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=00007fa52c2a7f00 CR3=000000000975a000 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=2033303a38303a3530203032206e754a XMM01=73732878696e755f6d6170203a5d3832 XMM02=65736f6c63206e6f6973736573203a29 XMM03=755f6d6170203a5d3832325b64687373 XMM04=69662068637573206f4e203a656c6163 XMM05=3a656c696620766e65206e65706f206f XMM06=65733a6468737328766e655f6d617020 XMM07=6b7a79732033303a38303a3530203032 XMM08=3d656e696c646d632022656369767265 XMM09=00000000000000000000000000000000 XMM10=00000000000000000000000000000000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000