syzkaller login: [ 30.788110] BUG: Bad rss-counter state mm:0000000091f145cf type:MM_FILEPAGES val:33 [ 30.789308] BUG: Bad rss-counter state mm:0000000091f145cf type:MM_ANONPAGES val:22 [ 30.831576] ================================================================== [ 30.832501] BUG: KASAN: slab-use-after-free in vma_interval_tree_remove+0xc75/0xec0 [ 30.833455] Read of size 8 at addr ffff88800c8d5968 by task sshd/221 [ 30.834238] [ 30.834461] CPU: 1 PID: 221 Comm: sshd Not tainted 6.4.0-rc7-next-20230620 #1 [ 30.835330] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS 1.12.0-1 04/01/2014 [ 30.836324] Call Trace: [ 30.836674] [ 30.837038] dump_stack_lvl+0x91/0xf0 [ 30.837628] print_report+0xcc/0x620 [ 30.838259] ? __virt_addr_valid+0x102/0x340 [ 30.838849] ? vma_interval_tree_remove+0xc75/0xec0 [ 30.839468] ? vma_interval_tree_remove+0xc75/0xec0 [ 30.840086] kasan_report+0xbe/0xf0 [ 30.840557] ? vma_interval_tree_remove+0xc75/0xec0 [ 30.841184] vma_interval_tree_remove+0xc75/0xec0 [ 30.841813] vma_prepare+0xc54/0x11a0 [ 30.842302] __split_vma+0x5af/0x950 [ 30.842777] ? __pfx___split_vma+0x10/0x10 [ 30.843305] ? find_held_lock+0x2c/0x110 [ 30.843822] do_vmi_align_munmap+0x2ba/0x11f0 [ 30.844391] ? lock_is_held_type+0x9f/0x120 [ 30.844934] ? __pfx_do_vmi_align_munmap+0x10/0x10 [ 30.845538] ? mtree_range_walk+0x632/0x900 [ 30.846102] ? mas_walk+0x5c7/0x7c0 [ 30.846580] do_vmi_munmap+0x1f1/0x2b0 [ 30.847071] mmap_region+0x1f9/0x2660 [ 30.847558] ? vm_mmap_pgoff+0x15c/0x3a0 [ 30.848069] ? __pfx_arch_get_unmapped_area_topdown+0x10/0x10 [ 30.848793] ? __pfx_lock_acquire+0x10/0x10 [ 30.849322] ? __pfx_mmap_region+0x10/0x10 [ 30.849869] ? security_mmap_addr+0x7d/0xa0 [ 30.850400] ? get_unmapped_area+0x1f5/0x3f0 [ 30.850956] do_mmap+0x854/0xf00 [ 30.851395] vm_mmap_pgoff+0x1a6/0x3a0 [ 30.851899] ? __pfx_vm_mmap_pgoff+0x10/0x10 [ 30.852470] ksys_mmap_pgoff+0x3af/0x500 [ 30.853197] do_syscall_64+0x3f/0x90 [ 30.853678] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 30.854352] RIP: 0033:0x7f5de70acd82 [ 30.854819] 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 [ 30.856953] RSP: 002b:00007fffe55489d8 EFLAGS: 00000206 ORIG_RAX: 0000000000000009 [ 30.857881] RAX: ffffffffffffffda RBX: 0000000000000812 RCX: 00007f5de70acd82 [ 30.858743] RDX: 0000000000000005 RSI: 0000000000001000 RDI: 00007f5de64e6000 [ 30.859607] RBP: 00007f5de64e6000 R08: 0000000000000009 R09: 0000000000001000 [ 30.860470] R10: 0000000000000812 R11: 0000000000000206 R12: 000055e495050ec0 [ 30.861324] R13: 00007fffe55489f0 R14: 00007fffe5548a20 R15: 00007fffe5548d80 [ 30.862202] [ 30.862500] [ 30.862718] Allocated by task 214: [ 30.863163] kasan_save_stack+0x22/0x50 [ 30.863675] kasan_set_track+0x25/0x30 [ 30.864177] __kasan_slab_alloc+0x59/0x70 [ 30.864709] kmem_cache_alloc+0x16b/0x370 [ 30.865224] vm_area_dup+0x20/0x160 [ 30.865689] __split_vma+0x170/0x950 [ 30.866182] split_vma+0xc6/0x110 [ 30.866630] mprotect_fixup+0x8d2/0xb30 [ 30.867144] do_mprotect_pkey+0x87e/0xd40 [ 30.867668] __x64_sys_mprotect+0x78/0xc0 [ 30.868199] do_syscall_64+0x3f/0x90 [ 30.868676] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 30.869326] [ 30.869542] Freed by task 211: [ 30.869950] kasan_save_stack+0x22/0x50 [ 30.870459] kasan_set_track+0x25/0x30 [ 30.870960] kasan_save_free_info+0x2b/0x50 [ 30.871495] __kasan_slab_free+0x10a/0x190 [ 30.872030] kmem_cache_free+0x10d/0x4d0 [ 30.872546] rcu_core+0x8c8/0x2860 [ 30.872991] __do_softirq+0x1b7/0x7d4 [ 30.873469] [ 30.873685] Last potentially related work creation: [ 30.874282] kasan_save_stack+0x22/0x50 [ 30.874787] __kasan_record_aux_stack+0x8e/0xa0 [ 30.875363] __call_rcu_common.constprop.0+0x6a/0xb90 [ 30.876014] remove_vma+0x139/0x170 [ 30.876467] do_vmi_align_munmap+0xd4a/0x11f0 [ 30.877031] do_vmi_munmap+0x1f1/0x2b0 [ 30.877521] __vm_munmap+0x138/0x3a0 [ 30.878005] __x64_sys_munmap+0x59/0x80 [ 30.878511] do_syscall_64+0x3f/0x90 [ 30.878992] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 30.879643] [ 30.879859] The buggy address belongs to the object at ffff88800c8d5910 [ 30.879859] which belongs to the cache vm_area_struct of size 168 [ 30.881329] The buggy address is located 88 bytes inside of [ 30.881329] freed 168-byte region [ffff88800c8d5910, ffff88800c8d59b8) [ 30.882744] [ 30.882962] The buggy address belongs to the physical page: [ 30.883631] page:00000000b4907dc2 refcount:1 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0xc8d5 [ 30.884724] memcg:ffff88800e11dc01 [ 30.885150] flags: 0x100000000000200(slab|node=0|zone=1) [ 30.885821] page_type: 0xffffffff() [ 30.886275] raw: 0100000000000200 ffff8880087a0c80 dead000000000122 0000000000000000 [ 30.887188] raw: 0000000000000000 0000000000110011 00000001ffffffff ffff88800e11dc01 [ 30.888097] page dumped because: kasan: bad access detected [ 30.888757] [ 30.888976] Memory state around the buggy address: [ 30.889560] ffff88800c8d5800: fc fc fc fc fc 00 00 00 00 00 00 00 00 00 00 00 [ 30.890428] ffff88800c8d5880: 00 00 00 00 00 00 00 00 00 00 fc fc fc fc fc fc [ 30.891280] >ffff88800c8d5900: fc fc fa fb fb fb fb fb fb fb fb fb fb fb fb fb [ 30.892130] ^ [ 30.892911] ffff88800c8d5980: fb fb fb fb fb fb fb fc fc fc fc fc fc fc fc fa [ 30.893775] ffff88800c8d5a00: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb [ 30.894627] ================================================================== [ 30.895786] Disabling lock debugging due to kernel taint [ 33.048608] BUG: Bad rss-counter state mm:00000000c3a0917e type:MM_FILEPAGES val:33 [ 33.049617] BUG: Bad rss-counter state mm:00000000c3a0917e type:MM_ANONPAGES val:22 [ 33.476644] BUG: Bad rss-counter state mm:00000000d65cc1e7 type:MM_FILEPAGES val:33 [ 33.477687] BUG: Bad rss-counter state mm:00000000d65cc1e7 type:MM_ANONPAGES val:22 Warning: Permanently added '[localhost]:46768' (ECDSA) to the list of known hosts. 2023/06/21 00:30:55 fuzzer started 2023/06/21 00:30:55 dialing manager at localhost:36067 2023/06/21 00:30:55 checking machine... 2023/06/21 00:30:55 checking revisions... [ 34.098363] kmemleak: Automatic memory scanning thread ended 2023/06/21 00:30:55 testing simple program... [ 34.146799] cgroup: Unknown subsys name 'net' [ 34.186922] cgroup: Unknown subsys name 'rlimit' executing program executing program executing program VM DIAGNOSIS: 00:30:55 Registers: info registers vcpu 0 RAX=0000000000000007 RBX=0000000000000000 RCX=0000000000000100 RDX=0000000000000000 RSI=ffffffff814c8467 RDI=ffffffff8542aab4 RBP=ffffffff8542a6c0 RSP=ffff88806ce099f0 R8 =0000000000000001 R9 =0000000000000000 R10=0000000000000000 R11=00000000000b54e7 R12=ffffffff86607dd4 R13=0000000000000000 R14=ffffffff8542a6c0 R15=ffff88800d841500 RIP=ffffffff8135bd96 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 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=00007f3f76265e60 CR3=000000000dba8000 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=2035353a30333a3030203132206e754a XMM01=73732878696e755f6d6170203a5d3133 XMM02=65736f6c63206e6f6973736573203a29 XMM03=755f6d6170203a5d3133325b64687373 XMM04=69662068637573206f4e203a656c6163 XMM05=3a656c696620766e65206e65706f206f XMM06=65733a6468737328766e655f6d617020 XMM07=6b7a79732035353a30333a3030203132 XMM08=3d656e696c646d632022656369767265 XMM09=00000000000000000000000000000000 XMM10=00000000000000000000000000000000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000 info registers vcpu 1 RAX=0000000000000000 RBX=0000000000000001 RCX=0000000000000000 RDX=0000000000000000 RSI=00000000000000fe RDI=ffffffff849be800 RBP=ffff88801bc302b0 RSP=ffff88801475f918 R8 =0000000000000001 R9 =0000000000000000 R10=0000000000000001 R11=0000000000000001 R12=00000000000000fe R13=0000000000000000 R14=1ffff110028ebf2f R15=0000000000000000 RIP=ffffffff8122e4cd 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 00007f6810112900 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=00007ffd1d7d4000 CR3=000000000f4f6000 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=635f6e6f69737365733a4d41503d706f XMM01=6f6c5f6d61702c78756e696c65735f6d XMM02=61702c74696d7265705f6d61702c7469 XMM03=655f6d61702c7374696d696c5f6d6170 XMM04=3d6c616e696d72657420322e322e302e XMM05=3d656d616e74736f682022646873732f XMM06=746f6f72223d746363612078756e696c XMM07=6e655f6d61702c7374696d696c5f6d61 XMM08=652075253d64692073253d706f000000 XMM09=00000000000000000000000000000000 XMM10=00000000000000000000000000000000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000