syzkaller login: [ 30.333320] BUG: Bad rss-counter state mm:00000000e36d36a6 type:MM_FILEPAGES val:33 [ 30.334600] BUG: Bad rss-counter state mm:00000000e36d36a6 type:MM_ANONPAGES val:22 [ 30.375861] ================================================================== [ 30.376964] BUG: KASAN: slab-use-after-free in vma_interval_tree_remove+0xc75/0xec0 [ 30.377974] Read of size 8 at addr ffff8880102393f8 by task sshd/220 [ 30.378829] [ 30.379065] CPU: 0 PID: 220 Comm: sshd Not tainted 6.4.0-rc7-next-20230620 #1 [ 30.380024] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS 1.12.0-1 04/01/2014 [ 30.381081] Call Trace: [ 30.381425] [ 30.381730] dump_stack_lvl+0x91/0xf0 [ 30.382267] print_report+0xcc/0x620 [ 30.382792] ? __virt_addr_valid+0x102/0x340 [ 30.383387] ? vma_interval_tree_remove+0xc75/0xec0 [ 30.384076] ? vma_interval_tree_remove+0xc75/0xec0 [ 30.384745] kasan_report+0xbe/0xf0 [ 30.385272] ? vma_interval_tree_remove+0xc75/0xec0 [ 30.385965] vma_interval_tree_remove+0xc75/0xec0 [ 30.386643] vma_prepare+0xc54/0x11a0 [ 30.387172] __split_vma+0x5af/0x950 [ 30.387703] ? __pfx___split_vma+0x10/0x10 [ 30.388318] ? find_held_lock+0x2c/0x110 [ 30.388897] do_vmi_align_munmap+0x2ba/0x11f0 [ 30.389532] ? lock_is_held_type+0x9f/0x120 [ 30.390144] ? __pfx_do_vmi_align_munmap+0x10/0x10 [ 30.390841] ? mtree_range_walk+0x632/0x900 [ 30.391477] ? mas_walk+0x5c7/0x7c0 [ 30.392036] do_vmi_munmap+0x1f1/0x2b0 [ 30.392601] mmap_region+0x1f9/0x2660 [ 30.393161] ? vm_mmap_pgoff+0x15c/0x3a0 [ 30.393747] ? __pfx_arch_get_unmapped_area_topdown+0x10/0x10 [ 30.394571] ? __pfx_lock_acquire+0x10/0x10 [ 30.395187] ? __pfx_mmap_region+0x10/0x10 [ 30.395803] ? security_mmap_addr+0x7d/0xa0 [ 30.396406] ? get_unmapped_area+0x1f5/0x3f0 [ 30.397036] do_mmap+0x854/0xf00 [ 30.397539] vm_mmap_pgoff+0x1a6/0x3a0 [ 30.398106] ? __pfx_vm_mmap_pgoff+0x10/0x10 [ 30.398749] ksys_mmap_pgoff+0x3af/0x500 [ 30.399323] do_syscall_64+0x3f/0x90 [ 30.399861] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 30.400572] RIP: 0033:0x7f91de10ad82 [ 30.401077] 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 [ 30.403433] RSP: 002b:00007ffc9771b5a8 EFLAGS: 00000206 ORIG_RAX: 0000000000000009 [ 30.404438] RAX: ffffffffffffffda RBX: 0000000000000812 RCX: 00007f91de10ad82 [ 30.405373] RDX: 0000000000000005 RSI: 0000000000001000 RDI: 00007f91dd544000 [ 30.406310] RBP: 00007f91dd544000 R08: 0000000000000009 R09: 0000000000001000 [ 30.407266] R10: 0000000000000812 R11: 0000000000000206 R12: 000056465917ef70 [ 30.408208] R13: 00007ffc9771b5c0 R14: 00007ffc9771b5f0 R15: 00007ffc9771b950 [ 30.409154] [ 30.409475] [ 30.409717] Allocated by task 213: [ 30.410195] kasan_save_stack+0x22/0x50 [ 30.410749] kasan_set_track+0x25/0x30 [ 30.411281] __kasan_slab_alloc+0x59/0x70 [ 30.411871] kmem_cache_alloc+0x16b/0x370 [ 30.412435] vm_area_dup+0x20/0x160 [ 30.412932] __split_vma+0x170/0x950 [ 30.413438] split_vma+0xc6/0x110 [ 30.413915] mprotect_fixup+0x8d2/0xb30 [ 30.414461] do_mprotect_pkey+0x87e/0xd40 [ 30.415031] __x64_sys_mprotect+0x78/0xc0 [ 30.415599] do_syscall_64+0x3f/0x90 [ 30.416116] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 30.416820] [ 30.417058] Freed by task 213: [ 30.417487] kasan_save_stack+0x22/0x50 [ 30.418045] kasan_set_track+0x25/0x30 [ 30.418581] kasan_save_free_info+0x2b/0x50 [ 30.419168] __kasan_slab_free+0x10a/0x190 [ 30.419777] kmem_cache_free+0x10d/0x4d0 [ 30.420343] rcu_core+0x8c8/0x2860 [ 30.420829] __do_softirq+0x1b7/0x7d4 [ 30.421356] [ 30.421594] Last potentially related work creation: [ 30.422236] kasan_save_stack+0x22/0x50 [ 30.422786] __kasan_record_aux_stack+0x8e/0xa0 [ 30.423417] __call_rcu_common.constprop.0+0x6a/0xb90 [ 30.424131] remove_vma+0x139/0x170 [ 30.424640] do_vmi_align_munmap+0xd4a/0x11f0 [ 30.425250] do_vmi_munmap+0x1f1/0x2b0 [ 30.425783] __vm_munmap+0x138/0x3a0 [ 30.426294] __x64_sys_munmap+0x59/0x80 [ 30.426827] do_syscall_64+0x3f/0x90 [ 30.427348] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 30.428046] [ 30.428279] The buggy address belongs to the object at ffff8880102393a0 [ 30.428279] which belongs to the cache vm_area_struct of size 168 [ 30.429875] The buggy address is located 88 bytes inside of [ 30.429875] freed 168-byte region [ffff8880102393a0, ffff888010239448) [ 30.431404] [ 30.431640] The buggy address belongs to the physical page: [ 30.432372] page:00000000e8e7a1c1 refcount:1 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0x10239 [ 30.433554] memcg:ffff88800f42fa01 [ 30.434016] flags: 0x100000000000200(slab|node=0|zone=1) [ 30.434722] page_type: 0xffffffff() [ 30.435209] raw: 0100000000000200 ffff8880087a0c80 dead000000000122 0000000000000000 [ 30.436206] raw: 0000000000000000 0000000000110011 00000001ffffffff ffff88800f42fa01 [ 30.437190] page dumped because: kasan: bad access detected [ 30.437907] [ 30.438142] Memory state around the buggy address: [ 30.438769] ffff888010239280: fc fc fc fc fc fc fc 00 00 00 00 00 00 00 00 00 [ 30.439693] ffff888010239300: 00 00 00 00 00 00 00 00 00 00 00 00 fc fc fc fc [ 30.440640] >ffff888010239380: fc fc fc fc fa fb fb fb fb fb fb fb fb fb fb fb [ 30.441556] ^ [ 30.442479] ffff888010239400: fb fb fb fb fb fb fb fb fb fc fc fc fc fc fc fc [ 30.443412] ffff888010239480: fc fa fb fb fb fb fb fb fb fb fb fb fb fb fb fb [ 30.444343] ================================================================== [ 30.445506] Disabling lock debugging due to kernel taint [ 32.391008] BUG: Bad rss-counter state mm:000000009ea6462c type:MM_FILEPAGES val:33 [ 32.392237] BUG: Bad rss-counter state mm:000000009ea6462c type:MM_ANONPAGES val:22 [ 32.801057] BUG: Bad rss-counter state mm:000000005d2d836b type:MM_FILEPAGES val:33 [ 32.802198] BUG: Bad rss-counter state mm:000000005d2d836b type:MM_ANONPAGES val:22 Warning: Permanently added '[localhost]:33509' (ECDSA) to the list of known hosts. 2023/06/20 12:25:14 fuzzer started 2023/06/20 12:25:14 dialing manager at localhost:36067 2023/06/20 12:25:14 checking machine... 2023/06/20 12:25:14 checking revisions... [ 33.489253] kmemleak: Automatic memory scanning thread ended 2023/06/20 12:25:14 testing simple program... [ 33.541712] cgroup: Unknown subsys name 'net' [ 33.579764] cgroup: Unknown subsys name 'rlimit' executing program executing program executing program VM DIAGNOSIS: 12:25:14 Registers: info registers vcpu 0 RAX=ffff88806ce35000 RBX=0000000000000000 RCX=ffffffff8451250e RDX=ffffed100d9c6a01 RSI=0000000000000004 RDI=ffffffff81288ac5 RBP=dffffc0000000000 RSP=ffffffff85407e10 R8 =0000000000000000 R9 =ffffed100d9c6a00 R10=ffff88806ce35003 R11=ffff888008c04000 R12=ffffffff85d3d350 R13=1ffffffff0a80fc7 R14=0000000000000000 R15=0000000000000000 RIP=ffffffff8451349f 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 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=00007ffe2556dc68 CR3=00000000144dc000 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=2034313a35323a3231203032206e754a XMM01=73732878696e755f6d6170203a5d3932 XMM02=65736f6c63206e6f6973736573203a29 XMM03=755f6d6170203a5d3932325b64687373 XMM04=69662068637573206f4e203a656c6163 XMM05=3a656c696620766e65206e65706f206f XMM06=65733a6468737328766e655f6d617020 XMM07=6b7a79732033313a35323a3231203032 XMM08=3d656e696c646d632022656369767265 XMM09=00000000000000000000000000000000 XMM10=00000000000000000000000000000000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000 info registers vcpu 1 RAX=0000000000020d8f RBX=0000000000000002 RCX=ffffffff8180c6a1 RDX=0000000000020d9d RSI=00000000000080c6 RDI=ffffffff86138eb6 RBP=ffff88806cf09aa8 RSP=ffff88806cf099e0 R8 =ffffffff86138e62 R9 =ffff88806cf09a90 R10=0000000000038001 R11=0000000000020d8f R12=ffff88806cf09ab0 R13=ffff88806cf09a98 R14=ffff88806cf09a91 R15=ffff88806cf09a50 RIP=ffffffff81130861 RFL=00000297 [--S-APC] 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 =0000 0000000000000000 00000000 00000000 DS =0000 0000000000000000 00000000 00000000 FS =0000 00007fe9749d3900 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=00007ffd50d6f000 CR3=000000000e6a6000 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=00000000000000000000000000000000 XMM02=00000000000000000000000000000000 XMM03=00000000000000000000000000000000 XMM04=00000000000000000000000000000000 XMM05=00000000000000000000000000000000 XMM06=313d6563636120322e322e202e30313d XMM07=672065736f6c635f6e6f69737365733a XMM08=652075253d64692073253d706f000000 XMM09=00000000000000000000000000000000 XMM10=00000000000000000000000000000000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000