syzkaller login: [ 31.136807] BUG: Bad rss-counter state mm:00000000665c3a68 type:MM_FILEPAGES val:33 [ 31.137597] BUG: Bad rss-counter state mm:00000000665c3a68 type:MM_ANONPAGES val:22 [ 31.255441] ================================================================== [ 31.256082] BUG: KASAN: slab-use-after-free in vma_interval_tree_remove+0xc75/0xec0 [ 31.256685] Read of size 8 at addr ffff88801a1cf968 by task sshd/220 [ 31.257172] [ 31.257315] CPU: 1 PID: 220 Comm: sshd Not tainted 6.4.0-rc7-next-20230620 #1 [ 31.257958] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS 1.12.0-1 04/01/2014 [ 31.258686] Call Trace: [ 31.258897] [ 31.259127] dump_stack_lvl+0x91/0xf0 [ 31.259472] print_report+0xcc/0x620 [ 31.260075] ? __virt_addr_valid+0x102/0x340 [ 31.260518] ? vma_interval_tree_remove+0xc75/0xec0 [ 31.260954] ? vma_interval_tree_remove+0xc75/0xec0 [ 31.261388] kasan_report+0xbe/0xf0 [ 31.261733] ? vma_interval_tree_remove+0xc75/0xec0 [ 31.262224] vma_interval_tree_remove+0xc75/0xec0 [ 31.262644] vma_prepare+0xc54/0x11a0 [ 31.262977] __split_vma+0x5af/0x950 [ 31.263304] ? __pfx___split_vma+0x10/0x10 [ 31.263660] ? find_held_lock+0x2c/0x110 [ 31.264014] do_vmi_align_munmap+0x2ba/0x11f0 [ 31.264401] ? lock_is_held_type+0x9f/0x120 [ 31.264770] ? __pfx_do_vmi_align_munmap+0x10/0x10 [ 31.265187] ? mtree_range_walk+0x632/0x900 [ 31.265571] ? mas_walk+0x5c7/0x7c0 [ 31.265908] do_vmi_munmap+0x1f1/0x2b0 [ 31.266306] mmap_region+0x1f9/0x2660 [ 31.266638] ? vm_mmap_pgoff+0x15c/0x3a0 [ 31.266987] ? __pfx_arch_get_unmapped_area_topdown+0x10/0x10 [ 31.267479] ? __pfx_lock_acquire+0x10/0x10 [ 31.267841] ? __pfx_mmap_region+0x10/0x10 [ 31.268187] ? security_mmap_addr+0x7d/0xa0 [ 31.268539] ? get_unmapped_area+0x1f5/0x3f0 [ 31.268911] do_mmap+0x854/0xf00 [ 31.269241] vm_mmap_pgoff+0x1a6/0x3a0 [ 31.269581] ? __pfx_vm_mmap_pgoff+0x10/0x10 [ 31.269977] ksys_mmap_pgoff+0x3af/0x500 [ 31.270353] do_syscall_64+0x3f/0x90 [ 31.270689] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 31.271090] RIP: 0033:0x7fc4e1be1d82 [ 31.271389] 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 [ 31.272839] RSP: 002b:00007ffe5c136f18 EFLAGS: 00000206 ORIG_RAX: 0000000000000009 [ 31.273501] RAX: ffffffffffffffda RBX: 0000000000000812 RCX: 00007fc4e1be1d82 [ 31.274199] RDX: 0000000000000005 RSI: 0000000000001000 RDI: 00007fc4e101b000 [ 31.274791] RBP: 00007fc4e101b000 R08: 0000000000000009 R09: 0000000000001000 [ 31.275339] R10: 0000000000000812 R11: 0000000000000206 R12: 0000562b4c4c1ec0 [ 31.275907] R13: 00007ffe5c136f30 R14: 00007ffe5c136f60 R15: 00007ffe5c1372c0 [ 31.276525] [ 31.276730] [ 31.276896] Allocated by task 213: [ 31.277276] kasan_save_stack+0x22/0x50 [ 31.277732] kasan_set_track+0x25/0x30 [ 31.278071] __kasan_slab_alloc+0x59/0x70 [ 31.278451] kmem_cache_alloc+0x16b/0x370 [ 31.278804] vm_area_dup+0x20/0x160 [ 31.279118] __split_vma+0x170/0x950 [ 31.279441] split_vma+0xc6/0x110 [ 31.279745] mprotect_fixup+0x8d2/0xb30 [ 31.280087] do_mprotect_pkey+0x87e/0xd40 [ 31.280445] __x64_sys_mprotect+0x78/0xc0 [ 31.280799] do_syscall_64+0x3f/0x90 [ 31.281132] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 31.281580] [ 31.281730] Freed by task 213: [ 31.281997] kasan_save_stack+0x22/0x50 [ 31.282359] kasan_set_track+0x25/0x30 [ 31.282695] kasan_save_free_info+0x2b/0x50 [ 31.283057] __kasan_slab_free+0x10a/0x190 [ 31.283425] kmem_cache_free+0x10d/0x4d0 [ 31.283777] rcu_core+0x8c8/0x2860 [ 31.284080] __do_softirq+0x1b7/0x7d4 [ 31.284412] [ 31.284572] Last potentially related work creation: [ 31.284969] kasan_save_stack+0x22/0x50 [ 31.285319] __kasan_record_aux_stack+0x8e/0xa0 [ 31.285716] __call_rcu_common.constprop.0+0x6a/0xb90 [ 31.286238] remove_vma+0x139/0x170 [ 31.286563] do_vmi_align_munmap+0xd4a/0x11f0 [ 31.286963] do_vmi_munmap+0x1f1/0x2b0 [ 31.287357] __vm_munmap+0x138/0x3a0 [ 31.287688] __x64_sys_munmap+0x59/0x80 [ 31.288044] do_syscall_64+0x3f/0x90 [ 31.288385] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 31.288821] [ 31.288972] The buggy address belongs to the object at ffff88801a1cf910 [ 31.288972] which belongs to the cache vm_area_struct of size 168 [ 31.290040] The buggy address is located 88 bytes inside of [ 31.290040] freed 168-byte region [ffff88801a1cf910, ffff88801a1cf9b8) [ 31.291047] [ 31.291199] The buggy address belongs to the physical page: [ 31.291672] page:00000000c94b821f refcount:1 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0x1a1cf [ 31.292440] memcg:ffff88801a1dc901 [ 31.292718] flags: 0x100000000000200(slab|node=0|zone=1) [ 31.293144] page_type: 0xffffffff() [ 31.293468] raw: 0100000000000200 ffff8880087a0c80 dead000000000122 0000000000000000 [ 31.294116] raw: 0000000000000000 0000000000110011 00000001ffffffff ffff88801a1dc901 [ 31.294799] page dumped because: kasan: bad access detected [ 31.295257] [ 31.295406] Memory state around the buggy address: [ 31.295813] ffff88801a1cf800: fc fc fc fc fc 00 00 00 00 00 00 00 00 00 00 00 [ 31.296417] ffff88801a1cf880: 00 00 00 00 00 00 00 00 00 00 fc fc fc fc fc fc [ 31.297036] >ffff88801a1cf900: fc fc fa fb fb fb fb fb fb fb fb fb fb fb fb fb [ 31.297605] ^ [ 31.298174] ffff88801a1cf980: fb fb fb fb fb fb fb fc fc fc fc fc fc fc fc fa [ 31.298765] ffff88801a1cfa00: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb [ 31.299339] ================================================================== [ 31.300068] Disabling lock debugging due to kernel taint [ 33.161373] BUG: Bad rss-counter state mm:00000000724e14ae type:MM_FILEPAGES val:33 [ 33.162012] BUG: Bad rss-counter state mm:00000000724e14ae type:MM_ANONPAGES val:22 [ 33.568735] BUG: Bad rss-counter state mm:0000000092787c9b type:MM_FILEPAGES val:33 [ 33.569497] BUG: Bad rss-counter state mm:0000000092787c9b type:MM_ANONPAGES val:22 Warning: Permanently added '[localhost]:28337' (ECDSA) to the list of known hosts. 2023/06/21 09:02:26 fuzzer started 2023/06/21 09:02:26 dialing manager at localhost:36067 2023/06/21 09:02:26 checking machine... 2023/06/21 09:02:26 checking revisions... [ 34.117162] kmemleak: Automatic memory scanning thread ended 2023/06/21 09:02:26 testing simple program... [ 34.158243] cgroup: Unknown subsys name 'net' [ 34.214715] cgroup: Unknown subsys name 'rlimit' executing program executing program executing program VM DIAGNOSIS: 09:02:26 Registers: info registers vcpu 0 RAX=dffffc0000000000 RBX=0000000000000001 RCX=0000000000000100 RDX=0000000000000000 RSI=ffffffff814c8467 RDI=ffffffff8542aab4 RBP=ffffffff8542a6c0 RSP=ffff88806ce09a10 R8 =0000000000000000 R9 =fffffbfff0ba7a6a R10=ffffffff85d3d357 R11=00000000000b54e7 R12=ffffffff86621198 R13=0000000000000000 R14=ffffffff8542a6c0 R15=ffff88800c9d07a0 RIP=ffffffff8135bdae RFL=00000202 [-------] 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=00007ffe0a9de3c8 CR3=000000000eb1c000 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=2036323a32303a3930203132206e754a XMM01=73732878696e755f6d6170203a5d3932 XMM02=65736f6c63206e6f6973736573203a29 XMM03=755f6d6170203a5d3932325b64687373 XMM04=69662068637573206f4e203a656c6163 XMM05=3a656c696620766e65206e65706f206f XMM06=65733a6468737328766e655f6d617020 XMM07=6b7a79732035323a32303a3930203132 XMM08=3d656e696c646d632022656369767265 XMM09=00000000000000000000000000000000 XMM10=00000000000000000000000000000000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000 info registers vcpu 1 RAX=0000000000000000 RBX=ffff88800ca18a00 RCX=ffff88800ca18a00 RDX=00000000000c0005 RSI=ffff88800ca18a00 RDI=ffff8880087b8780 RBP=ffff88800d0177f8 RSP=ffff88800d017760 R8 =00000000000c0004 R9 =0000000000000000 R10=ffffea0000328600 R11=00000000000d000c R12=ffffea0000328600 R13=ffff88800ca19b80 R14=00000000000c0004 R15=ffff8880087b8780 RIP=ffffffff81809672 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 =0000 0000000000000000 00000000 00000000 DS =0000 0000000000000000 00000000 00000000 FS =0000 00007f919c6ce900 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=00007f919bafa170 CR3=000000000d76e000 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=454d49544c4145525f454352554f535f XMM01=3d504d415453454d49545f454d49544c XMM02=ffffffffffffffffffffffffffffffff XMM03=2f6c616e72756f6a2f676f6c2f6e7572 XMM04=e622782dbfa8f61100000000000ae988 XMM05=32f73cca423db25c0000000000132bb8 XMM06=19e9129bd510f2350000000000131a50 XMM07=00000000000000000000000000000000 XMM08=415453454d49545f454d49544c414552 XMM09=00000000000000000000000000000000 XMM10=00000000000000000000000000000000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000