syzkaller login: [ 38.159196] BUG: Bad rss-counter state mm:00000000d09a35e7 type:MM_FILEPAGES val:33 [ 38.161459] BUG: Bad rss-counter state mm:00000000d09a35e7 type:MM_ANONPAGES val:22 [ 38.331358] ================================================================== [ 38.332472] BUG: KASAN: slab-use-after-free in vma_interval_tree_remove+0xc75/0xec0 [ 38.333642] Read of size 8 at addr ffff88800d8fd228 by task sshd/220 [ 38.334447] [ 38.334648] CPU: 0 PID: 220 Comm: sshd Not tainted 6.4.0-rc7-next-20230619 #1 [ 38.335414] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS 1.12.0-1 04/01/2014 [ 38.336290] Call Trace: [ 38.336574] <TASK> [ 38.336844] dump_stack_lvl+0x91/0xf0 [ 38.337284] print_report+0xcc/0x620 [ 38.337721] ? __virt_addr_valid+0x102/0x340 [ 38.338222] ? vma_interval_tree_remove+0xc75/0xec0 [ 38.338774] ? vma_interval_tree_remove+0xc75/0xec0 [ 38.339324] kasan_report+0xbe/0xf0 [ 38.339746] ? vma_interval_tree_remove+0xc75/0xec0 [ 38.340303] vma_interval_tree_remove+0xc75/0xec0 [ 38.340857] vma_prepare+0xc54/0x11a0 [ 38.341293] __split_vma+0x5af/0x950 [ 38.341712] ? __pfx___split_vma+0x10/0x10 [ 38.342186] ? find_held_lock+0x2c/0x110 [ 38.342663] do_vmi_align_munmap+0x2ba/0x11f0 [ 38.343171] ? lock_is_held_type+0x9f/0x120 [ 38.343657] ? __pfx_do_vmi_align_munmap+0x10/0x10 [ 38.344211] ? mtree_range_walk+0x632/0x900 [ 38.344701] ? mas_walk+0x5c7/0x7c0 [ 38.345155] do_vmi_munmap+0x1f1/0x2b0 [ 38.345594] mmap_region+0x1f9/0x2660 [ 38.346027] ? vm_mmap_pgoff+0x15c/0x3a0 [ 38.346489] ? __pfx_arch_get_unmapped_area_topdown+0x10/0x10 [ 38.347130] ? __pfx_lock_acquire+0x10/0x10 [ 38.347607] ? __pfx_mmap_region+0x10/0x10 [ 38.348082] ? security_mmap_addr+0x7d/0xa0 [ 38.348562] ? get_unmapped_area+0x1f5/0x3f0 [ 38.349060] do_mmap+0x854/0xf00 [ 38.349453] vm_mmap_pgoff+0x1a6/0x3a0 [ 38.349898] ? __pfx_vm_mmap_pgoff+0x10/0x10 [ 38.350402] ksys_mmap_pgoff+0x3af/0x500 [ 38.350855] do_syscall_64+0x3f/0x90 [ 38.351286] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 38.351864] RIP: 0033:0x7f0368e58d82 [ 38.352273] 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 [ 38.354205] RSP: 002b:00007ffe980cdea8 EFLAGS: 00000206 ORIG_RAX: 0000000000000009 [ 38.355010] RAX: ffffffffffffffda RBX: 0000000000000812 RCX: 00007f0368e58d82 [ 38.355772] RDX: 0000000000000005 RSI: 0000000000001000 RDI: 00007f0368292000 [ 38.356529] RBP: 00007f0368292000 R08: 0000000000000009 R09: 0000000000001000 [ 38.357311] R10: 0000000000000812 R11: 0000000000000206 R12: 000055d81668dec0 [ 38.358072] R13: 00007ffe980cdec0 R14: 00007ffe980cdef0 R15: 00007ffe980ce250 [ 38.358837] </TASK> [ 38.359099] [ 38.359293] Allocated by task 213: [ 38.359673] kasan_save_stack+0x22/0x50 [ 38.360132] kasan_set_track+0x25/0x30 [ 38.360579] __kasan_slab_alloc+0x59/0x70 [ 38.361061] kmem_cache_alloc+0x16b/0x370 [ 38.361530] vm_area_dup+0x20/0x160 [ 38.361941] __split_vma+0x170/0x950 [ 38.362358] split_vma+0xc6/0x110 [ 38.362753] mprotect_fixup+0x8d2/0xb30 [ 38.363214] do_mprotect_pkey+0x87e/0xd40 [ 38.363681] __x64_sys_mprotect+0x78/0xc0 [ 38.364155] do_syscall_64+0x3f/0x90 [ 38.364578] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 38.365161] [ 38.365355] Freed by task 213: [ 38.365709] kasan_save_stack+0x22/0x50 [ 38.366161] kasan_set_track+0x25/0x30 [ 38.366599] kasan_save_free_info+0x2b/0x50 [ 38.367088] __kasan_slab_free+0x10a/0x190 [ 38.367568] kmem_cache_free+0x10d/0x4d0 [ 38.368026] rcu_core+0x8c8/0x2860 [ 38.368426] __do_softirq+0x1b7/0x7d4 [ 38.368867] [ 38.369062] Last potentially related work creation: [ 38.369590] kasan_save_stack+0x22/0x50 [ 38.370044] __kasan_record_aux_stack+0x8e/0xa0 [ 38.370562] __call_rcu_common.constprop.0+0x6a/0xb90 [ 38.371146] remove_vma+0x139/0x170 [ 38.371556] do_vmi_align_munmap+0xd4a/0x11f0 [ 38.372058] do_vmi_munmap+0x1f1/0x2b0 [ 38.372491] __vm_munmap+0x138/0x3a0 [ 38.372918] __x64_sys_munmap+0x59/0x80 [ 38.373375] do_syscall_64+0x3f/0x90 [ 38.373802] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 38.374375] [ 38.374569] The buggy address belongs to the object at ffff88800d8fd1d0 [ 38.374569] which belongs to the cache vm_area_struct of size 168 [ 38.375893] The buggy address is located 88 bytes inside of [ 38.375893] freed 168-byte region [ffff88800d8fd1d0, ffff88800d8fd278) [ 38.377180] [ 38.377375] The buggy address belongs to the physical page: [ 38.377974] page:000000006603d28b refcount:1 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0xd8fd [ 38.378952] memcg:ffff88800d79e701 [ 38.379338] flags: 0x100000000000200(slab|node=0|zone=1) [ 38.379915] page_type: 0xffffffff() [ 38.380323] raw: 0100000000000200 ffff88800879fc80 dead000000000122 0000000000000000 [ 38.381144] raw: 0000000000000000 0000000000110011 00000001ffffffff ffff88800d79e701 [ 38.381931] page dumped because: kasan: bad access detected [ 38.382506] [ 38.382692] Memory state around the buggy address: [ 38.383200] ffff88800d8fd100: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 [ 38.383936] ffff88800d8fd180: 00 00 fc fc fc fc fc fc fc fc fa fb fb fb fb fb [ 38.384678] >ffff88800d8fd200: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fc [ 38.385417] ^ [ 38.385899] ffff88800d8fd280: fc fc fc fc fc fc fc fa fb fb fb fb fb fb fb fb [ 38.386637] ffff88800d8fd300: fb fb fb fb fb fb fb fb fb fb fb fb fc fc fc fc [ 38.387374] ================================================================== [ 38.388222] Disabling lock debugging due to kernel taint [ 40.230838] BUG: Bad rss-counter state mm:000000007aff305b type:MM_FILEPAGES val:33 [ 40.231649] BUG: Bad rss-counter state mm:000000007aff305b type:MM_ANONPAGES val:22 [ 40.793837] BUG: Bad rss-counter state mm:00000000b1db0515 type:MM_FILEPAGES val:33 [ 40.795185] BUG: Bad rss-counter state mm:00000000b1db0515 type:MM_ANONPAGES val:22 Warning: Permanently added '[localhost]:7730' (ECDSA) to the list of known hosts. 2023/06/19 11:00:38 fuzzer started 2023/06/19 11:00:39 dialing manager at localhost:44161 2023/06/19 11:00:39 checking machine... 2023/06/19 11:00:39 checking revisions... [ 41.414804] kmemleak: Automatic memory scanning thread ended 2023/06/19 11:00:39 testing simple program... [ 41.455581] cgroup: Unknown subsys name 'net' [ 41.498959] cgroup: Unknown subsys name 'rlimit' executing program executing program executing program VM DIAGNOSIS: 11:00:29 Registers: info registers vcpu 0 RAX=ffff88806ce35000 RBX=0000000000000000 RCX=ffffffff8450c50e RDX=ffffed100d9c6a01 RSI=0000000000000004 RDI=ffffffff812889a5 RBP=dffffc0000000000 RSP=ffffffff85407e10 R8 =0000000000000000 R9 =ffffed100d9c6a00 R10=ffff88806ce35003 R11=ffff888008c58000 R12=ffffffff85d3bed0 R13=1ffffffff0a80fc7 R14=0000000000000000 R15=0000000000000000 RIP=ffffffff8450d49f 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=00007f8689acba30 CR3=000000000d704000 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=00000000000000000000000000000000 XMM01=efd238cdef164e89354a8de86e59bd54 XMM02=0000000000120058eff9b2d0a8fce9cb XMM03=00000000001201282c67c8bc2e329bc3 XMM04=3781d9a9987e718300000000000ae988 XMM05=19e9129bd510f2350000000000134320 XMM06=58599ec8012e388a0000000000133188 XMM07=e042d86d42eb936e0000000000124a48 XMM08=d54883e7edba1f180000000000120128 XMM09=00000000000000000000000000000000 XMM10=20200000000020202020202020200000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000 info registers vcpu 1 RAX=0000000000000000 RBX=0000000000000002 RCX=ffffffff86088c1a RDX=0000000000000000 RSI=0000000000000001 RDI=0000000000000001 RBP=ffff88806cf09af0 RSP=ffff88806cf099d8 R8 =ffffffff86088c1e R9 =ffff88806cf09ad8 R10=0000000000038001 R11=0000000000003c0d R12=ffff88806cf09af8 R13=ffff88806cf09ae0 R14=ffff88806cf09ad9 R15=ffff88806cf09a98 RIP=ffffffff81130ad6 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 00007f5870e8d900 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=00007ffee354a000 CR3=000000000e0aa000 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=ffffffffffffffffffff000000000000 XMM01=000000000000003635006b6f6c6c756e XMM02=62003d73646e756f7200323135616873 XMM03=5320444f4854454d5f54505952434e45 XMM04=40404040404040404040404040404040 XMM05=5a5a5a5a5a5a5a5a5a5a5a5a5a5a5a5a XMM06=20202020202020202020202020202020 XMM07=00000000000000000000000000000000 XMM08=00000000000000000000000000202020 XMM09=ff0000ffffffffffff00000000ffffff XMM10=00000000000000000000000000000000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000