syzkaller login: [ 31.202385] BUG: Bad rss-counter state mm:000000009975737c type:MM_FILEPAGES val:33 [ 31.203656] BUG: Bad rss-counter state mm:000000009975737c type:MM_ANONPAGES val:22 [ 31.360583] ================================================================== [ 31.361504] BUG: KASAN: slab-use-after-free in vma_interval_tree_remove+0xc75/0xec0 [ 31.362421] Read of size 8 at addr ffff88801a095058 by task sshd/220 [ 31.363168] [ 31.363382] CPU: 0 PID: 220 Comm: sshd Not tainted 6.4.0-rc7-next-20230620 #1 [ 31.364328] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS 1.12.0-1 04/01/2014 [ 31.365278] Call Trace: [ 31.365596] [ 31.365887] dump_stack_lvl+0x91/0xf0 [ 31.366367] print_report+0xcc/0x620 [ 31.366848] ? __virt_addr_valid+0x102/0x340 [ 31.367392] ? vma_interval_tree_remove+0xc75/0xec0 [ 31.367997] ? vma_interval_tree_remove+0xc75/0xec0 [ 31.368604] kasan_report+0xbe/0xf0 [ 31.369102] ? vma_interval_tree_remove+0xc75/0xec0 [ 31.369712] vma_interval_tree_remove+0xc75/0xec0 [ 31.370298] vma_prepare+0xc54/0x11a0 [ 31.370768] __split_vma+0x5af/0x950 [ 31.371228] ? __pfx___split_vma+0x10/0x10 [ 31.371742] ? find_held_lock+0x2c/0x110 [ 31.372246] do_vmi_align_munmap+0x2ba/0x11f0 [ 31.372794] ? lock_is_held_type+0x9f/0x120 [ 31.373325] ? __pfx_do_vmi_align_munmap+0x10/0x10 [ 31.373914] ? mtree_range_walk+0x632/0x900 [ 31.374454] ? mas_walk+0x5c7/0x7c0 [ 31.374916] do_vmi_munmap+0x1f1/0x2b0 [ 31.375393] mmap_region+0x1f9/0x2660 [ 31.375860] ? vm_mmap_pgoff+0x15c/0x3a0 [ 31.376359] ? __pfx_arch_get_unmapped_area_topdown+0x10/0x10 [ 31.377122] ? __pfx_lock_acquire+0x10/0x10 [ 31.377658] ? __pfx_mmap_region+0x10/0x10 [ 31.378193] ? security_mmap_addr+0x7d/0xa0 [ 31.378730] ? get_unmapped_area+0x1f5/0x3f0 [ 31.379281] do_mmap+0x854/0xf00 [ 31.379730] vm_mmap_pgoff+0x1a6/0x3a0 [ 31.380230] ? __pfx_vm_mmap_pgoff+0x10/0x10 [ 31.380793] ksys_mmap_pgoff+0x3af/0x500 [ 31.381314] do_syscall_64+0x3f/0x90 [ 31.381799] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 31.382446] RIP: 0033:0x7f220e37dd82 [ 31.382912] 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 [ 31.385061] RSP: 002b:00007ffe37a19068 EFLAGS: 00000206 ORIG_RAX: 0000000000000009 [ 31.385968] RAX: ffffffffffffffda RBX: 0000000000000812 RCX: 00007f220e37dd82 [ 31.386815] RDX: 0000000000000005 RSI: 0000000000001000 RDI: 00007f220d7b7000 [ 31.387665] RBP: 00007f220d7b7000 R08: 0000000000000009 R09: 0000000000001000 [ 31.388509] R10: 0000000000000812 R11: 0000000000000206 R12: 000056473223cf70 [ 31.389370] R13: 00007ffe37a19080 R14: 00007ffe37a190b0 R15: 00007ffe37a19410 [ 31.390226] [ 31.390518] [ 31.390732] Allocated by task 213: [ 31.391158] kasan_save_stack+0x22/0x50 [ 31.391654] kasan_set_track+0x25/0x30 [ 31.392132] __kasan_slab_alloc+0x59/0x70 [ 31.392659] kmem_cache_alloc+0x16b/0x370 [ 31.393182] vm_area_dup+0x20/0x160 [ 31.393637] __split_vma+0x170/0x950 [ 31.394101] split_vma+0xc6/0x110 [ 31.394538] mprotect_fixup+0x8d2/0xb30 [ 31.395041] do_mprotect_pkey+0x87e/0xd40 [ 31.395562] __x64_sys_mprotect+0x78/0xc0 [ 31.396084] do_syscall_64+0x3f/0x90 [ 31.396560] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 31.397209] [ 31.397423] Freed by task 213: [ 31.397812] kasan_save_stack+0x22/0x50 [ 31.398319] kasan_set_track+0x25/0x30 [ 31.398816] kasan_save_free_info+0x2b/0x50 [ 31.399353] __kasan_slab_free+0x10a/0x190 [ 31.399884] kmem_cache_free+0x10d/0x4d0 [ 31.400391] rcu_core+0x8c8/0x2860 [ 31.400837] __do_softirq+0x1b7/0x7d4 [ 31.401329] [ 31.401543] Last potentially related work creation: [ 31.402122] kasan_save_stack+0x22/0x50 [ 31.402627] __kasan_record_aux_stack+0x8e/0xa0 [ 31.403195] __call_rcu_common.constprop.0+0x6a/0xb90 [ 31.403833] remove_vma+0x139/0x170 [ 31.404281] do_vmi_align_munmap+0xd4a/0x11f0 [ 31.404834] do_vmi_munmap+0x1f1/0x2b0 [ 31.405326] __vm_munmap+0x138/0x3a0 [ 31.405793] __x64_sys_munmap+0x59/0x80 [ 31.406287] do_syscall_64+0x3f/0x90 [ 31.406756] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 31.407387] [ 31.407599] The buggy address belongs to the object at ffff88801a095000 [ 31.407599] which belongs to the cache vm_area_struct of size 168 [ 31.409067] The buggy address is located 88 bytes inside of [ 31.409067] freed 168-byte region [ffff88801a095000, ffff88801a0950a8) [ 31.410453] [ 31.410668] The buggy address belongs to the physical page: [ 31.411334] page:0000000009786f41 refcount:1 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0x1a095 [ 31.412417] memcg:ffff88800fc8df01 [ 31.412831] flags: 0x100000000000200(slab|node=0|zone=1) [ 31.413481] page_type: 0xffffffff() [ 31.413931] raw: 0100000000000200 ffff8880087a0c80 dead000000000100 dead000000000122 [ 31.414836] raw: 0000000000000000 0000000000110011 00000001ffffffff ffff88800fc8df01 [ 31.415745] page dumped because: kasan: bad access detected [ 31.416407] [ 31.416627] Memory state around the buggy address: [ 31.417214] ffff88801a094f00: fb fb fb fb fb fb fc fc fc fc fc fc fc fc fc fc [ 31.418070] ffff88801a094f80: fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc [ 31.418930] >ffff88801a095000: fa fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb [ 31.419777] ^ [ 31.420500] ffff88801a095080: fb fb fb fb fb fc fc fc fc fc fc fc fc 00 00 00 [ 31.421370] ffff88801a095100: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 [ 31.422238] ================================================================== [ 31.423224] Disabling lock debugging due to kernel taint [ 33.570481] BUG: Bad rss-counter state mm:00000000abdffd98 type:MM_FILEPAGES val:33 [ 33.571633] BUG: Bad rss-counter state mm:00000000abdffd98 type:MM_ANONPAGES val:22 [ 33.925954] BUG: Bad rss-counter state mm:00000000edd918ed type:MM_FILEPAGES val:33 [ 33.927406] BUG: Bad rss-counter state mm:00000000edd918ed type:MM_ANONPAGES val:22 Warning: Permanently added '[localhost]:30311' (ECDSA) to the list of known hosts. 2023/06/21 10:40:28 fuzzer started 2023/06/21 10:40:28 dialing manager at localhost:36067 2023/06/21 10:40:28 checking machine... 2023/06/21 10:40:28 checking revisions... [ 34.635489] kmemleak: Automatic memory scanning thread ended 2023/06/21 10:40:28 testing simple program... [ 34.687634] cgroup: Unknown subsys name 'net' [ 34.725650] cgroup: Unknown subsys name 'rlimit' executing program executing program executing program VM DIAGNOSIS: 10:40:27 Registers: info registers vcpu 0 RAX=0000000000000008 RBX=0000000000000000 RCX=0000000000000000 RDX=0000000000000006 RSI=ffffffff84d39b00 RDI=0000000000000000 RBP=ffffffff84d39b00 RSP=ffff888015eefaa8 R8 =0000000000000000 R9 =0000000000000000 R10=ffffffff85d3d357 R11=00000000000b6a61 R12=0000000000000000 R13=ffff88800c5f4dc0 R14=00000000000000f4 R15=0000000000000001 RIP=ffffffff814c0476 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 00007f0cff8e6900 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=00007ffcf85f7000 CR3=00000000097f6000 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=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 info registers vcpu 1 RAX=ffff88806cf35000 RBX=0000000000000001 RCX=ffffffff8451250e RDX=ffffed100d9e6a01 RSI=0000000000000004 RDI=ffffffff81288ac5 RBP=dffffc0000000000 RSP=ffff888008e07e70 R8 =0000000000000000 R9 =ffffed100d9e6a00 R10=ffff88806cf35003 R11=0000000000000001 R12=ffffffff85d3d350 R13=1ffff110011c0fd3 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 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=00007f3f7e6c8000 CR3=0000000016a94000 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=2037323a30343a3031203132206e754a XMM01=73732878696e755f6d6170203a5d3033 XMM02=65736f6c63206e6f6973736573203a29 XMM03=755f6d6170203a5d3033325b64687373 XMM04=69662068637573206f4e203a656c6163 XMM05=3a656c696620766e65206e65706f206f XMM06=65733a6468737328766e655f6d617020 XMM07=6b7a79732037323a30343a3031203132 XMM08=3d656e696c646d632022656369767265 XMM09=00000000000000000000000000000000 XMM10=00000000000000000000000000000000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000