syzkaller login: [ 29.243921] BUG: Bad rss-counter state mm:000000001e243877 type:MM_FILEPAGES val:33 [ 29.245423] BUG: Bad rss-counter state mm:000000001e243877 type:MM_ANONPAGES val:22 [ 29.411147] ================================================================== [ 29.412063] BUG: KASAN: slab-use-after-free in vma_interval_tree_remove+0xc75/0xec0 [ 29.413022] Read of size 8 at addr ffff888009d0c5c8 by task sshd/220 [ 29.413794] [ 29.414117] CPU: 0 PID: 220 Comm: sshd Not tainted 6.4.0-rc7-next-20230619 #1 [ 29.414994] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS 1.12.0-1 04/01/2014 [ 29.415976] Call Trace: [ 29.416312] [ 29.416606] dump_stack_lvl+0x91/0xf0 [ 29.417099] print_report+0xcc/0x620 [ 29.417591] ? __virt_addr_valid+0x102/0x340 [ 29.418149] ? vma_interval_tree_remove+0xc75/0xec0 [ 29.418802] ? vma_interval_tree_remove+0xc75/0xec0 [ 29.419421] kasan_report+0xbe/0xf0 [ 29.419901] ? vma_interval_tree_remove+0xc75/0xec0 [ 29.420524] vma_interval_tree_remove+0xc75/0xec0 [ 29.421130] vma_prepare+0xc54/0x11a0 [ 29.421617] __split_vma+0x5af/0x950 [ 29.422100] ? __pfx___split_vma+0x10/0x10 [ 29.422635] ? find_held_lock+0x2c/0x110 [ 29.423172] do_vmi_align_munmap+0x2ba/0x11f0 [ 29.423735] ? lock_is_held_type+0x9f/0x120 [ 29.424275] ? __pfx_do_vmi_align_munmap+0x10/0x10 [ 29.424885] ? mtree_range_walk+0x632/0x900 [ 29.425435] ? mas_walk+0x5c7/0x7c0 [ 29.425910] do_vmi_munmap+0x1f1/0x2b0 [ 29.426415] mmap_region+0x1f9/0x2660 [ 29.426911] ? vm_mmap_pgoff+0x15c/0x3a0 [ 29.427434] ? __pfx_arch_get_unmapped_area_topdown+0x10/0x10 [ 29.428153] ? __pfx_lock_acquire+0x10/0x10 [ 29.428684] ? __pfx_mmap_region+0x10/0x10 [ 29.429214] ? security_mmap_addr+0x7d/0xa0 [ 29.429739] ? get_unmapped_area+0x1f5/0x3f0 [ 29.430314] do_mmap+0x854/0xf00 [ 29.430762] vm_mmap_pgoff+0x1a6/0x3a0 [ 29.431267] ? __pfx_vm_mmap_pgoff+0x10/0x10 [ 29.431835] ksys_mmap_pgoff+0x3af/0x500 [ 29.432362] do_syscall_64+0x3f/0x90 [ 29.432866] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 29.433533] RIP: 0033:0x7fe264dced82 [ 29.434004] 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 [ 29.436250] RSP: 002b:00007ffe333ad058 EFLAGS: 00000206 ORIG_RAX: 0000000000000009 [ 29.437208] RAX: ffffffffffffffda RBX: 0000000000000812 RCX: 00007fe264dced82 [ 29.438092] RDX: 0000000000000005 RSI: 0000000000001000 RDI: 00007fe264208000 [ 29.438991] RBP: 00007fe264208000 R08: 0000000000000009 R09: 0000000000001000 [ 29.439889] R10: 0000000000000812 R11: 0000000000000206 R12: 00005648e3bfbf70 [ 29.440750] R13: 00007ffe333ad070 R14: 00007ffe333ad0a0 R15: 00007ffe333ad400 [ 29.441601] [ 29.441899] [ 29.442112] Allocated by task 212: [ 29.442557] kasan_save_stack+0x22/0x50 [ 29.443060] kasan_set_track+0x25/0x30 [ 29.443553] __kasan_slab_alloc+0x59/0x70 [ 29.444070] kmem_cache_alloc+0x16b/0x370 [ 29.444594] vm_area_dup+0x20/0x160 [ 29.445052] __split_vma+0x170/0x950 [ 29.445522] split_vma+0xc6/0x110 [ 29.445961] mprotect_fixup+0x8d2/0xb30 [ 29.446473] do_mprotect_pkey+0x87e/0xd40 [ 29.446997] __x64_sys_mprotect+0x78/0xc0 [ 29.447515] do_syscall_64+0x3f/0x90 [ 29.447984] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 29.448619] [ 29.448834] Freed by task 203: [ 29.449227] kasan_save_stack+0x22/0x50 [ 29.449722] kasan_set_track+0x25/0x30 [ 29.450226] kasan_save_free_info+0x2b/0x50 [ 29.450755] __kasan_slab_free+0x10a/0x190 [ 29.451288] kmem_cache_free+0x10d/0x4d0 [ 29.451793] rcu_core+0x8c8/0x2860 [ 29.452240] __do_softirq+0x1b7/0x7d4 [ 29.452712] [ 29.452925] Last potentially related work creation: [ 29.453502] kasan_save_stack+0x22/0x50 [ 29.454004] __kasan_record_aux_stack+0x8e/0xa0 [ 29.454595] __call_rcu_common.constprop.0+0x6a/0xb90 [ 29.455233] remove_vma+0x139/0x170 [ 29.455680] do_vmi_align_munmap+0xd4a/0x11f0 [ 29.456241] do_vmi_munmap+0x1f1/0x2b0 [ 29.456727] __vm_munmap+0x138/0x3a0 [ 29.457192] __x64_sys_munmap+0x59/0x80 [ 29.457700] do_syscall_64+0x3f/0x90 [ 29.458197] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 29.458843] [ 29.459058] The buggy address belongs to the object at ffff888009d0c570 [ 29.459058] which belongs to the cache vm_area_struct of size 168 [ 29.460545] The buggy address is located 88 bytes inside of [ 29.460545] freed 168-byte region [ffff888009d0c570, ffff888009d0c618) [ 29.461957] [ 29.462195] The buggy address belongs to the physical page: [ 29.462888] page:00000000b5e181cb refcount:1 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0x9d0c [ 29.464037] memcg:ffff88800e10c001 [ 29.464481] flags: 0x100000000000200(slab|node=0|zone=1) [ 29.465158] page_type: 0xffffffff() [ 29.465639] raw: 0100000000000200 ffff88800879fc80 dead000000000122 0000000000000000 [ 29.466635] raw: 0000000000000000 0000000000110011 00000001ffffffff ffff88800e10c001 [ 29.467590] page dumped because: kasan: bad access detected [ 29.468283] [ 29.468507] Memory state around the buggy address: [ 29.469118] ffff888009d0c480: fc 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 [ 29.470012] ffff888009d0c500: 00 00 00 00 00 00 fc fc fc fc fc fc fc fc fa fb [ 29.470922] >ffff888009d0c580: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb [ 29.471805] ^ [ 29.472501] ffff888009d0c600: fb fb fb fc fc fc fc fc fc fc fc fa fb fb fb fb [ 29.473378] ffff888009d0c680: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb [ 29.474282] ================================================================== [ 29.475435] Disabling lock debugging due to kernel taint [ 31.661084] BUG: Bad rss-counter state mm:0000000015e4e59c type:MM_FILEPAGES val:33 [ 31.662110] BUG: Bad rss-counter state mm:0000000015e4e59c type:MM_ANONPAGES val:22 [ 32.130052] BUG: Bad rss-counter state mm:00000000a22573b7 type:MM_FILEPAGES val:33 [ 32.131094] BUG: Bad rss-counter state mm:00000000a22573b7 type:MM_ANONPAGES val:22 Warning: Permanently added '[localhost]:30613' (ECDSA) to the list of known hosts. 2023/06/19 21:00:11 fuzzer started 2023/06/19 21:00:12 dialing manager at localhost:44161 2023/06/19 21:00:12 checking machine... 2023/06/19 21:00:12 checking revisions... [ 32.893451] kmemleak: Automatic memory scanning thread ended 2023/06/19 21:00:12 testing simple program... [ 32.932866] cgroup: Unknown subsys name 'net' [ 32.987927] cgroup: Unknown subsys name 'rlimit' executing program executing program executing program VM DIAGNOSIS: 21:00:11 Registers: info registers vcpu 0 RAX=ffffffff86137009 RBX=0000000000000002 RCX=ffffffff86137004 RDX=0000000000000002 RSI=0000000000000001 RDI=ffffffff85dfc6a4 RBP=ffff88806ce09af0 RSP=ffff88806ce09a28 R8 =ffffffff86137004 R9 =ffff88806ce09ad8 R10=0000000000038001 R11=0000000000020cb4 R12=ffff88806ce09af8 R13=ffff88806ce09ae0 R14=ffff88806ce09ad9 R15=ffff88806ce09a98 RIP=ffffffff81130a72 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 00007fa03e22e900 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=00007fa03e7e3650 CR3=000000000d96c000 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=ffffffff00ffffffffffffffffffffff XMM01=707465675f6c697475646f6d6d61705f XMM02=ff000000000000ff0000000000ff0000 XMM03=66207463656e6e6f6373696420646576 XMM04=00000000000000000000000000000000 XMM05=00000000000000000000000000000000 XMM06=0d0c0f0e09080b0a0504070601000302 XMM07=00000000000000000000000000000000 XMM08=000a0d732a2e25006c61746166003367 XMM09=00000000000000000000000000000000 XMM10=00000000000000000000000000000000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000 info registers vcpu 1 RAX=ffff88806cf35000 RBX=0000000000000001 RCX=ffffffff8450c50e RDX=ffffed100d9e6a01 RSI=0000000000000004 RDI=ffffffff812889a5 RBP=dffffc0000000000 RSP=ffff888008e27e70 R8 =0000000000000000 R9 =ffffed100d9e6a00 R10=ffff88806cf35003 R11=ffff888008c58400 R12=ffffffff85d3bed0 R13=1ffff110011c4fd3 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 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=00007ffdbee67b18 CR3=0000000005482000 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=00000000000000000000000000000000 XMM01=00007efdb76a5510000055d2da73d790 XMM02=6f6974707972636e6561737268746977 XMM03=00000000000000000000000000777074 XMM04=40404040404040404040404040404040 XMM05=5a5a5a5a5a5a5a5a5a5a5a5a5a5a5a5a XMM06=20202020202020202020202020202020 XMM07=ffffffffffff00ffffff00ffffff00ff XMM08=00002000000000202020002020200000 XMM09=ffffffffffff00ffffff00ffffff00ff XMM10=00002000000000202020002020200000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000