syzkaller login: [ 36.347481] BUG: Bad rss-counter state mm:00000000f7c1387a type:MM_FILEPAGES val:33 [ 36.348751] BUG: Bad rss-counter state mm:00000000f7c1387a type:MM_ANONPAGES val:22 [ 36.494886] ================================================================== [ 36.496029] BUG: KASAN: slab-use-after-free in vma_interval_tree_remove+0xc75/0xec0 [ 36.497205] Read of size 8 at addr ffff88800e6de310 by task sshd/219 [ 36.497979] [ 36.498201] CPU: 1 PID: 219 Comm: sshd Not tainted 6.4.0-rc7-next-20230619 #1 [ 36.499098] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS 1.12.0-1 04/01/2014 [ 36.500101] Call Trace: [ 36.500427] [ 36.500711] dump_stack_lvl+0x91/0xf0 [ 36.501209] print_report+0xcc/0x620 [ 36.501695] ? __virt_addr_valid+0x102/0x340 [ 36.502252] ? vma_interval_tree_remove+0xc75/0xec0 [ 36.502877] ? vma_interval_tree_remove+0xc75/0xec0 [ 36.503510] kasan_report+0xbe/0xf0 [ 36.504006] ? vma_interval_tree_remove+0xc75/0xec0 [ 36.504647] vma_interval_tree_remove+0xc75/0xec0 [ 36.505294] vma_prepare+0xc54/0x11a0 [ 36.505792] __split_vma+0x5af/0x950 [ 36.506283] ? __pfx___split_vma+0x10/0x10 [ 36.506839] ? find_held_lock+0x2c/0x110 [ 36.507379] do_vmi_align_munmap+0x2ba/0x11f0 [ 36.507962] ? lock_is_held_type+0x9f/0x120 [ 36.508552] ? __pfx_do_vmi_align_munmap+0x10/0x10 [ 36.509178] ? mtree_range_walk+0x632/0x900 [ 36.509754] ? mas_walk+0x5c7/0x7c0 [ 36.510244] do_vmi_munmap+0x1f1/0x2b0 [ 36.510764] mmap_region+0x1f9/0x2660 [ 36.511263] ? vm_mmap_pgoff+0x15c/0x3a0 [ 36.511805] ? __pfx_arch_get_unmapped_area_topdown+0x10/0x10 [ 36.512557] ? __pfx_lock_acquire+0x10/0x10 [ 36.513119] ? __pfx_mmap_region+0x10/0x10 [ 36.513677] ? security_mmap_addr+0x7d/0xa0 [ 36.514234] ? get_unmapped_area+0x1f5/0x3f0 [ 36.514810] do_mmap+0x854/0xf00 [ 36.515273] vm_mmap_pgoff+0x1a6/0x3a0 [ 36.515793] ? __pfx_vm_mmap_pgoff+0x10/0x10 [ 36.516386] ksys_mmap_pgoff+0x3af/0x500 [ 36.516922] do_syscall_64+0x3f/0x90 [ 36.517419] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 36.518089] RIP: 0033:0x7fee75abdd82 [ 36.518567] 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 [ 36.520817] RSP: 002b:00007ffd94fbbdb8 EFLAGS: 00000206 ORIG_RAX: 0000000000000009 [ 36.521764] RAX: ffffffffffffffda RBX: 0000000000000812 RCX: 00007fee75abdd82 [ 36.522660] RDX: 0000000000000005 RSI: 0000000000001000 RDI: 00007fee74ef7000 [ 36.523547] RBP: 00007fee74ef7000 R08: 0000000000000009 R09: 0000000000001000 [ 36.524449] R10: 0000000000000812 R11: 0000000000000206 R12: 00005610d44aab20 [ 36.525328] R13: 00007ffd94fbbdd0 R14: 00007ffd94fbbe00 R15: 00007ffd94fbc160 [ 36.526221] [ 36.526526] [ 36.526747] Allocated by task 212: [ 36.527193] kasan_save_stack+0x22/0x50 [ 36.527714] kasan_set_track+0x25/0x30 [ 36.528249] __kasan_slab_alloc+0x59/0x70 [ 36.528800] kmem_cache_alloc+0x16b/0x370 [ 36.529341] vm_area_dup+0x20/0x160 [ 36.529814] __split_vma+0x170/0x950 [ 36.530296] split_vma+0xc6/0x110 [ 36.530753] mprotect_fixup+0x8d2/0xb30 [ 36.531281] do_mprotect_pkey+0x87e/0xd40 [ 36.531829] __x64_sys_mprotect+0x78/0xc0 [ 36.532384] do_syscall_64+0x3f/0x90 [ 36.532886] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 36.533557] [ 36.533782] Freed by task 209: [ 36.534191] kasan_save_stack+0x22/0x50 [ 36.534712] kasan_set_track+0x25/0x30 [ 36.535222] kasan_save_free_info+0x2b/0x50 [ 36.535784] __kasan_slab_free+0x10a/0x190 [ 36.536359] kmem_cache_free+0x10d/0x4d0 [ 36.536889] rcu_core+0x8c8/0x2860 [ 36.537492] __do_softirq+0x1b7/0x7d4 [ 36.537987] [ 36.538210] Last potentially related work creation: [ 36.538831] kasan_save_stack+0x22/0x50 [ 36.539354] __kasan_record_aux_stack+0x8e/0xa0 [ 36.539955] __call_rcu_common.constprop.0+0x6a/0xb90 [ 36.540649] remove_vma+0x139/0x170 [ 36.541118] do_vmi_align_munmap+0xd4a/0x11f0 [ 36.541700] do_vmi_munmap+0x1f1/0x2b0 [ 36.542206] __vm_munmap+0x138/0x3a0 [ 36.542691] __x64_sys_munmap+0x59/0x80 [ 36.543204] do_syscall_64+0x3f/0x90 [ 36.543696] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 36.544382] [ 36.544604] The buggy address belongs to the object at ffff88800e6de2b8 [ 36.544604] which belongs to the cache vm_area_struct of size 168 [ 36.546137] The buggy address is located 88 bytes inside of [ 36.546137] freed 168-byte region [ffff88800e6de2b8, ffff88800e6de360) [ 36.547600] [ 36.547833] The buggy address belongs to the physical page: [ 36.548533] page:000000008faad462 refcount:1 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0xe6de [ 36.549674] memcg:ffff88800e08f001 [ 36.550117] flags: 0x100000000000200(slab|node=0|zone=1) [ 36.550790] page_type: 0xffffffff() [ 36.551261] raw: 0100000000000200 ffff88800879fc80 dead000000000122 0000000000000000 [ 36.552245] raw: 0000000000000000 0000000000110011 00000001ffffffff ffff88800e08f001 [ 36.553197] page dumped because: kasan: bad access detected [ 36.553891] [ 36.554113] Memory state around the buggy address: [ 36.554724] ffff88800e6de200: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 fc [ 36.555627] ffff88800e6de280: fc fc fc fc fc fc fc fa fb fb fb fb fb fb fb fb [ 36.556539] >ffff88800e6de300: fb fb fb fb fb fb fb fb fb fb fb fb fc fc fc fc [ 36.557430] ^ [ 36.557921] ffff88800e6de380: fc fc fc fc fa fb fb fb fb fb fb fb fb fb fb fb [ 36.558811] ffff88800e6de400: fb fb fb fb fb fb fb fb fb fc fc fc fc fc fc fc [ 36.559696] ================================================================== [ 36.560807] Disabling lock debugging due to kernel taint [ 39.136543] BUG: Bad rss-counter state mm:0000000012bc80d0 type:MM_FILEPAGES val:33 [ 39.137726] BUG: Bad rss-counter state mm:0000000012bc80d0 type:MM_ANONPAGES val:22 [ 39.631671] BUG: Bad rss-counter state mm:00000000a01ff751 type:MM_FILEPAGES val:33 [ 39.632646] BUG: Bad rss-counter state mm:00000000a01ff751 type:MM_ANONPAGES val:22 Warning: Permanently added '[localhost]:54263' (ECDSA) to the list of known hosts. 2023/06/20 00:50:23 fuzzer started 2023/06/20 00:50:23 dialing manager at localhost:44161 2023/06/20 00:50:23 checking machine... 2023/06/20 00:50:23 checking revisions... [ 40.384912] kmemleak: Automatic memory scanning thread ended 2023/06/20 00:50:23 testing simple program... [ 40.435859] cgroup: Unknown subsys name 'net' [ 40.490576] cgroup: Unknown subsys name 'rlimit' executing program executing program executing program VM DIAGNOSIS: 00:50:17 Registers: info registers vcpu 0 RAX=ffffffff8137ab10 RBX=000000000000000a RCX=ffffffff84531e74 RDX=0000000000000000 RSI=dffffc0000000000 RDI=ffffffff8540a108 RBP=ffffffff8540a108 RSP=ffff888008d7fe58 R8 =0000000000000000 R9 =fffffbfff0ba77da R10=ffffffff85d3bed7 R11=0000000000000128 R12=0000000000000100 R13=0000000000000009 R14=0000000000000200 R15=0000000000000009 RIP=ffffffff8137ab10 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=00007fff91b955f8 CR3=000000000e412000 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=2032323a30353a3030203032206e754a XMM01=657463656e6e6f63736944203a5d3832 XMM02=302e303120746f6f722072657375206d XMM03=203a5d3832325b646873732072656c6c XMM04=69662068637573206f4e203a656c6163 XMM05=3a656c696620766e65206e65706f206f XMM06=65733a6468737328766e655f6d617020 XMM07=6b7a79732032323a30353a3030203032 XMM08=3d656e696c646d632022656369767265 XMM09=00000000000000000000000000000000 XMM10=00000000000000000000000000000000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000 info registers vcpu 1 RAX=0000000000000003 RBX=0000000000000001 RCX=ffffffff810bd032 RDX=0000000000000bd0 RSI=0000000000000bd0 RDI=ffffffff864eab00 RBP=ffff88800da179b0 RSP=ffff88800da17898 R8 =0000000000000000 R9 =ffff88800da17998 R10=0000000000038001 R11=0000000000006097 R12=ffff88800da179b8 R13=ffff88800da179a0 R14=ffff88800da17999 R15=ffff88800da17958 RIP=ffffffff8113078b 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 00007f0b39673900 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=00007f0b39c2a618 CR3=0000000016ac8000 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=563412feff00545000000000000080fe XMM01=6e69676f6c5f6d61702c78756e696c65 XMM02=755f6d61702c74696d7265705f6d6170 XMM03=2c766e655f6d61702c7374696d696c5f XMM04=6d61702c766e655f6d61702c7374696d XMM05=78696e755f6d61702c74696d7265705f XMM06=6469756e69676f6c5f6d61702c78756e XMM07=672065736f6c635f6e6f69737365733a XMM08=61662029286e65706f5f746964756100 XMM09=00000000000000000000000000000000 XMM10=00000000000000000000000000000000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000