syzkaller login: [ 35.280682] BUG: Bad rss-counter state mm:00000000dbeb7fb8 type:MM_FILEPAGES val:33 [ 35.282365] BUG: Bad rss-counter state mm:00000000dbeb7fb8 type:MM_ANONPAGES val:22 [ 35.449964] ================================================================== [ 35.451088] BUG: KASAN: slab-use-after-free in vma_interval_tree_remove+0xc75/0xec0 [ 35.452028] Read of size 8 at addr ffff88801a625228 by task sshd/219 [ 35.452987] [ 35.453203] CPU: 1 PID: 219 Comm: sshd Not tainted 6.4.0-rc7-next-20230619 #1 [ 35.454042] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS 1.12.0-1 04/01/2014 [ 35.455064] Call Trace: [ 35.455373] [ 35.455643] dump_stack_lvl+0x91/0xf0 [ 35.456112] print_report+0xcc/0x620 [ 35.456722] ? __virt_addr_valid+0x102/0x340 [ 35.457263] ? vma_interval_tree_remove+0xc75/0xec0 [ 35.457876] ? vma_interval_tree_remove+0xc75/0xec0 [ 35.458545] kasan_report+0xbe/0xf0 [ 35.459015] ? vma_interval_tree_remove+0xc75/0xec0 [ 35.459653] vma_interval_tree_remove+0xc75/0xec0 [ 35.460332] vma_prepare+0xc54/0x11a0 [ 35.460789] __split_vma+0x5af/0x950 [ 35.461236] ? __pfx___split_vma+0x10/0x10 [ 35.461733] ? find_held_lock+0x2c/0x110 [ 35.462248] do_vmi_align_munmap+0x2ba/0x11f0 [ 35.462779] ? lock_is_held_type+0x9f/0x120 [ 35.463290] ? __pfx_do_vmi_align_munmap+0x10/0x10 [ 35.463865] ? mtree_range_walk+0x632/0x900 [ 35.464483] ? mas_walk+0x5c7/0x7c0 [ 35.465064] do_vmi_munmap+0x1f1/0x2b0 [ 35.465656] mmap_region+0x1f9/0x2660 [ 35.466263] ? vm_mmap_pgoff+0x15c/0x3a0 [ 35.466869] ? __pfx_arch_get_unmapped_area_topdown+0x10/0x10 [ 35.467735] ? __pfx_lock_acquire+0x10/0x10 [ 35.468374] ? __pfx_mmap_region+0x10/0x10 [ 35.469002] ? security_mmap_addr+0x7d/0xa0 [ 35.469644] ? get_unmapped_area+0x1f5/0x3f0 [ 35.470319] do_mmap+0x854/0xf00 [ 35.470850] vm_mmap_pgoff+0x1a6/0x3a0 [ 35.471455] ? __pfx_vm_mmap_pgoff+0x10/0x10 [ 35.472126] ksys_mmap_pgoff+0x3af/0x500 [ 35.472730] do_syscall_64+0x3f/0x90 [ 35.473309] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 35.474096] RIP: 0033:0x7f6864833d82 [ 35.474650] 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 [ 35.477243] RSP: 002b:00007ffed0de0168 EFLAGS: 00000206 ORIG_RAX: 0000000000000009 [ 35.478355] RAX: ffffffffffffffda RBX: 0000000000000812 RCX: 00007f6864833d82 [ 35.479385] RDX: 0000000000000005 RSI: 0000000000001000 RDI: 00007f6863c6d000 [ 35.480398] RBP: 00007f6863c6d000 R08: 0000000000000009 R09: 0000000000001000 [ 35.481410] R10: 0000000000000812 R11: 0000000000000206 R12: 0000556239ac3b20 [ 35.482439] R13: 00007ffed0de0180 R14: 00007ffed0de01b0 R15: 00007ffed0de0510 [ 35.483466] [ 35.483811] [ 35.484063] Allocated by task 212: [ 35.484472] kasan_save_stack+0x22/0x50 [ 35.484951] kasan_set_track+0x25/0x30 [ 35.485417] __kasan_slab_alloc+0x59/0x70 [ 35.485909] kmem_cache_alloc+0x16b/0x370 [ 35.486406] vm_area_dup+0x20/0x160 [ 35.486834] __split_vma+0x170/0x950 [ 35.487279] split_vma+0xc6/0x110 [ 35.487691] mprotect_fixup+0x8d2/0xb30 [ 35.488163] do_mprotect_pkey+0x87e/0xd40 [ 35.488653] __x64_sys_mprotect+0x78/0xc0 [ 35.489141] do_syscall_64+0x3f/0x90 [ 35.489594] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 35.490217] [ 35.490424] Freed by task 212: [ 35.490793] kasan_save_stack+0x22/0x50 [ 35.491270] kasan_set_track+0x25/0x30 [ 35.491745] kasan_save_free_info+0x2b/0x50 [ 35.492252] __kasan_slab_free+0x10a/0x190 [ 35.492767] kmem_cache_free+0x10d/0x4d0 [ 35.493326] rcu_core+0x8c8/0x2860 [ 35.493886] __do_softirq+0x1b7/0x7d4 [ 35.494414] [ 35.494648] Last potentially related work creation: [ 35.495266] kasan_save_stack+0x22/0x50 [ 35.495799] __kasan_record_aux_stack+0x8e/0xa0 [ 35.496416] __call_rcu_common.constprop.0+0x6a/0xb90 [ 35.497090] remove_vma+0x139/0x170 [ 35.497569] do_vmi_align_munmap+0xd4a/0x11f0 [ 35.498179] do_vmi_munmap+0x1f1/0x2b0 [ 35.498700] __vm_munmap+0x138/0x3a0 [ 35.499206] __x64_sys_munmap+0x59/0x80 [ 35.499713] do_syscall_64+0x3f/0x90 [ 35.500208] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 35.500894] [ 35.501126] The buggy address belongs to the object at ffff88801a6251d0 [ 35.501126] which belongs to the cache vm_area_struct of size 168 [ 35.502703] The buggy address is located 88 bytes inside of [ 35.502703] freed 168-byte region [ffff88801a6251d0, ffff88801a625278) [ 35.504207] [ 35.504434] The buggy address belongs to the physical page: [ 35.505144] page:00000000cc01f7a8 refcount:1 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0x1a625 [ 35.506352] memcg:ffff88800e739101 [ 35.506774] flags: 0x100000000000200(slab|node=0|zone=1) [ 35.507411] page_type: 0xffffffff() [ 35.507858] raw: 0100000000000200 ffff88800879fc80 dead000000000122 0000000000000000 [ 35.508770] raw: 0000000000000000 0000000000110011 00000001ffffffff ffff88800e739101 [ 35.509665] page dumped because: kasan: bad access detected [ 35.510342] [ 35.510558] Memory state around the buggy address: [ 35.511125] ffff88801a625100: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 [ 35.511989] ffff88801a625180: 00 00 fc fc fc fc fc fc fc fc fa fb fb fb fb fb [ 35.512855] >ffff88801a625200: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fc [ 35.513697] ^ [ 35.514262] ffff88801a625280: fc fc fc fc fc fc fc fa fb fb fb fb fb fb fb fb [ 35.515152] ffff88801a625300: fb fb fb fb fb fb fb fb fb fb fb fb fc fc fc fc [ 35.516037] ================================================================== [ 35.517004] Disabling lock debugging due to kernel taint [ 37.725675] BUG: Bad rss-counter state mm:00000000b699e0c9 type:MM_FILEPAGES val:33 [ 37.726699] BUG: Bad rss-counter state mm:00000000b699e0c9 type:MM_ANONPAGES val:22 [ 38.204267] BUG: Bad rss-counter state mm:00000000bdfa4108 type:MM_FILEPAGES val:33 [ 38.205290] BUG: Bad rss-counter state mm:00000000bdfa4108 type:MM_ANONPAGES val:22 Warning: Permanently added '[localhost]:52202' (ECDSA) to the list of known hosts. 2023/06/19 16:32:26 fuzzer started 2023/06/19 16:32:26 dialing manager at localhost:44161 2023/06/19 16:32:26 checking machine... 2023/06/19 16:32:26 checking revisions... [ 38.867346] kmemleak: Automatic memory scanning thread ended 2023/06/19 16:32:27 testing simple program... [ 38.903761] cgroup: Unknown subsys name 'net' [ 38.953948] cgroup: Unknown subsys name 'rlimit' executing program executing program executing program VM DIAGNOSIS: 16:32:22 Registers: info registers vcpu 0 RAX=dffffc0000000000 RBX=0000000000000001 RCX=ffffffff860b8308 RDX=1ffff1100d9c1356 RSI=1ffff1100d9c1355 RDI=1ffff1100d9c1355 RBP=ffff88806ce09aa8 RSP=ffff88806ce099e0 R8 =ffffffff860b830c R9 =ffff88806ce09a90 R10=0000000000038001 R11=000000000000ba82 R12=ffff88806ce09ab0 R13=ffff88806ce09a98 R14=ffffffff85407ed0 R15=ffff88806ce09a50 RIP=ffffffff811310ce 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=00007f7e4623f8a0 CR3=0000000016b84000 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=2036323a32333a3631203931206e754a XMM01=73732878696e755f6d6170203a5d3832 XMM02=65736f6c63206e6f6973736573203a29 XMM03=755f6d6170203a5d3832325b64687373 XMM04=69662068637573206f4e203a656c6163 XMM05=3a656c696620766e65206e65706f206f XMM06=65733a6468737328766e655f6d617020 XMM07=6b7a79732036323a32333a3631203931 XMM08=3d656e696c646d632022656369767265 XMM09=00000000000000000000000000000000 XMM10=00000000000000000000000000000000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000 info registers vcpu 1 RAX=0000000080000101 RBX=00007fe4d6527366 RCX=0000000080000101 RDX=0000000000000000 RSI=ffffffff813a0a74 RDI=00007fe4d6527366 RBP=00007fe4d6527366 RSP=ffff88806cf09a20 R8 =0000000000000007 R9 =ffffffffff600000 R10=00007fe4d6527000 R11=00000000000b6996 R12=ffff88806cf09b60 R13=0000000000000000 R14=ffff888015fd1b40 R15=ffff88801bc6f678 RIP=ffffffff814c07f1 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 00007fe4d6034900 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=00007ffe231c0000 CR3=000000001cd50000 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=6720646572637465733a4d41503d706f XMM01=652022746f6f72223d74636361207469 XMM02=3d6c616e696d72657420322e322e302e XMM03=3d656d616e74736f682022646873732f XMM04=40404040404040404040404040404040 XMM05=5a5a5a5a5a5a5a5a5a5a5a5a5a5a5a5a XMM06=20202020202020202020202020202020 XMM07=00000000000000000000000000000000 XMM08=652075253d64692073253d706f000000 XMM09=00000000000000000000000000000000 XMM10=00000000000000000000000000000000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000