[ 56.444916] BUG: Bad rss-counter state mm:00000000d8613916 type:MM_FILEPAGES val:33 [ 56.446326] BUG: Bad rss-counter state mm:00000000d8613916 type:MM_ANONPAGES val:22 [ 56.592156] ================================================================== [ 56.593079] BUG: KASAN: slab-use-after-free in vma_interval_tree_remove+0xc75/0xec0 [ 56.594012] Read of size 8 at addr ffff888015c2d058 by task sshd/227 [ 56.594784] [ 56.595004] CPU: 0 PID: 227 Comm: sshd Not tainted 6.4.0-rc7-next-20230620 #1 [ 56.595938] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS 1.12.0-1 04/01/2014 [ 56.596940] Call Trace: [ 56.597290] [ 56.597573] dump_stack_lvl+0x91/0xf0 [ 56.598065] print_report+0xcc/0x620 [ 56.598544] ? __virt_addr_valid+0x102/0x340 [ 56.599102] ? vma_interval_tree_remove+0xc75/0xec0 [ 56.599728] ? vma_interval_tree_remove+0xc75/0xec0 [ 56.600376] kasan_report+0xbe/0xf0 [ 56.600849] ? vma_interval_tree_remove+0xc75/0xec0 [ 56.601475] vma_interval_tree_remove+0xc75/0xec0 [ 56.602090] vma_prepare+0xc54/0x11a0 [ 56.602565] __split_vma+0x5af/0x950 [ 56.603044] ? __pfx___split_vma+0x10/0x10 [ 56.603582] ? find_held_lock+0x2c/0x110 [ 56.604107] do_vmi_align_munmap+0x2ba/0x11f0 [ 56.604689] ? lock_is_held_type+0x9f/0x120 [ 56.605248] ? __pfx_do_vmi_align_munmap+0x10/0x10 [ 56.605863] ? mtree_range_walk+0x632/0x900 [ 56.606419] ? mas_walk+0x5c7/0x7c0 [ 56.606900] do_vmi_munmap+0x1f1/0x2b0 [ 56.607394] mmap_region+0x1f9/0x2660 [ 56.607878] ? vm_mmap_pgoff+0x15c/0x3a0 [ 56.608402] ? __pfx_arch_get_unmapped_area_topdown+0x10/0x10 [ 56.609120] ? __pfx_lock_acquire+0x10/0x10 [ 56.609666] ? __pfx_mmap_region+0x10/0x10 [ 56.610199] ? security_mmap_addr+0x7d/0xa0 [ 56.610738] ? get_unmapped_area+0x1f5/0x3f0 [ 56.611293] do_mmap+0x854/0xf00 [ 56.611737] vm_mmap_pgoff+0x1a6/0x3a0 [ 56.612251] ? __pfx_vm_mmap_pgoff+0x10/0x10 [ 56.612828] ksys_mmap_pgoff+0x3af/0x500 [ 56.613346] do_syscall_64+0x3f/0x90 [ 56.613828] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 56.614481] RIP: 0033:0x7f0a93910d82 [ 56.614939] 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 [ 56.617101] RSP: 002b:00007ffecb7e96b8 EFLAGS: 00000206 ORIG_RAX: 0000000000000009 [ 56.618019] RAX: ffffffffffffffda RBX: 0000000000000812 RCX: 00007f0a93910d82 [ 56.618883] RDX: 0000000000000005 RSI: 0000000000001000 RDI: 00007f0a92d4a000 [ 56.619746] RBP: 00007f0a92d4a000 R08: 0000000000000009 R09: 0000000000001000 [ 56.620618] R10: 0000000000000812 R11: 0000000000000206 R12: 000055a32a9bc980 [ 56.621474] R13: 00007ffecb7e96d0 R14: 00007ffecb7e9700 R15: 00007ffecb7e9a60 [ 56.622340] [ 56.622634] [ 56.622854] Allocated by task 214: [ 56.623290] kasan_save_stack+0x22/0x50 [ 56.623799] kasan_set_track+0x25/0x30 [ 56.624312] __kasan_slab_alloc+0x59/0x70 [ 56.624838] kmem_cache_alloc+0x16b/0x370 [ 56.625361] vm_area_dup+0x20/0x160 [ 56.625817] __split_vma+0x170/0x950 [ 56.626296] split_vma+0xc6/0x110 [ 56.626745] mprotect_fixup+0x8d2/0xb30 [ 56.627251] do_mprotect_pkey+0x87e/0xd40 [ 56.627775] __x64_sys_mprotect+0x78/0xc0 [ 56.628314] do_syscall_64+0x3f/0x90 [ 56.628797] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 56.629441] [ 56.629656] Freed by task 214: [ 56.630059] kasan_save_stack+0x22/0x50 [ 56.630570] kasan_set_track+0x25/0x30 [ 56.631067] kasan_save_free_info+0x2b/0x50 [ 56.631609] __kasan_slab_free+0x10a/0x190 [ 56.632137] kmem_cache_free+0x10d/0x4d0 [ 56.632658] rcu_core+0x8c8/0x2860 [ 56.633102] __do_softirq+0x1b7/0x7d4 [ 56.633587] [ 56.633804] Last potentially related work creation: [ 56.634404] kasan_save_stack+0x22/0x50 [ 56.634904] __kasan_record_aux_stack+0x8e/0xa0 [ 56.635487] __call_rcu_common.constprop.0+0x6a/0xb90 [ 56.636136] remove_vma+0x139/0x170 [ 56.636605] do_vmi_align_munmap+0xd4a/0x11f0 [ 56.637173] do_vmi_munmap+0x1f1/0x2b0 [ 56.637658] __vm_munmap+0x138/0x3a0 [ 56.638128] __x64_sys_munmap+0x59/0x80 [ 56.638623] do_syscall_64+0x3f/0x90 [ 56.639102] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 56.639762] [ 56.639983] The buggy address belongs to the object at ffff888015c2d000 [ 56.639983] which belongs to the cache vm_area_struct of size 168 [ 56.641470] The buggy address is located 88 bytes inside of [ 56.641470] freed 168-byte region [ffff888015c2d000, ffff888015c2d0a8) [ 56.642907] [ 56.643124] The buggy address belongs to the physical page: [ 56.643798] page:00000000ee26f8be refcount:1 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0x15c2d [ 56.644938] memcg:ffff88800ec0c601 [ 56.645374] flags: 0x100000000000200(slab|node=0|zone=1) [ 56.646028] page_type: 0xffffffff() [ 56.646486] raw: 0100000000000200 ffff8880087a0c80 dead000000000122 0000000000000000 [ 56.647417] raw: 0000000000000000 0000000000110011 00000001ffffffff ffff88800ec0c601 [ 56.648356] page dumped because: kasan: bad access detected [ 56.649022] [ 56.649240] Memory state around the buggy address: [ 56.649826] ffff888015c2cf00: fb fb fb fb fb fb fc fc fc fc fc fc fc fc fc fc [ 56.650688] ffff888015c2cf80: fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc [ 56.651544] >ffff888015c2d000: fa fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb [ 56.652406] ^ [ 56.653139] ffff888015c2d080: fb fb fb fb fb fc fc fc fc fc fc fc fc fa fb fb [ 56.653996] ffff888015c2d100: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb [ 56.654865] ================================================================== [ 56.655842] Disabling lock debugging due to kernel taint Debian GNU/Linux 11 syzkaller ttyS0 syzkaller login: [ 58.655233] BUG: Bad rss-counter state mm:00000000c3f90aad type:MM_FILEPAGES val:33 [ 58.656439] BUG: Bad rss-counter state mm:00000000c3f90aad type:MM_ANONPAGES val:22 [ 59.063893] BUG: Bad rss-counter state mm:0000000044edd0f4 type:MM_FILEPAGES val:33 [ 59.065501] BUG: Bad rss-counter state mm:0000000044edd0f4 type:MM_ANONPAGES val:22 Warning: Permanently added '[localhost]:39509' (ECDSA) to the list of known hosts. 2023/06/20 21:52:29 fuzzer started 2023/06/20 21:52:29 dialing manager at localhost:36067 2023/06/20 21:52:29 checking machine... 2023/06/20 21:52:29 checking revisions... [ 59.823519] kmemleak: Automatic memory scanning thread ended 2023/06/20 21:52:29 testing simple program... [ 59.872397] cgroup: Unknown subsys name 'net' [ 59.942955] cgroup: Unknown subsys name 'rlimit' executing program executing program executing program VM DIAGNOSIS: 21:52:29 Registers: info registers vcpu 0 RAX=ffff88806ce35000 RBX=0000000000000000 RCX=ffffffff8451250e RDX=ffffed100d9c6a01 RSI=0000000000000004 RDI=ffffffff81288ac5 RBP=dffffc0000000000 RSP=ffffffff85407e10 R8 =0000000000000000 R9 =ffffed100d9c6a00 R10=ffff88806ce35003 R11=ffff888008c04000 R12=ffffffff85d3d350 R13=1ffffffff0a80fc7 R14=0000000000000000 R15=0000000000000000 RIP=ffffffff8451349f 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=00007fdb7c119a70 CR3=000000001a48c000 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=2038323a32353a3132203032206e754a XMM01=73732878696e755f6d6170203a5d3633 XMM02=65736f6c63206e6f6973736573203a29 XMM03=755f6d6170203a5d3633325b64687373 XMM04=69662068637573206f4e203a656c6163 XMM05=3a656c696620766e65206e65706f206f XMM06=65733a6468737328766e655f6d617020 XMM07=6b7a79732038323a32353a3132203032 XMM08=3d656e696c646d632022656369767265 XMM09=00000000000000000000000000000000 XMM10=00000000000000000000000000000000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000 info registers vcpu 1 RAX=ffffffff864bbb54 RBX=0000000000000001 RCX=ffffffff846000a9 RDX=0000000000000000 RSI=ffffffff864bbb4e RDI=ffffffff86055348 RBP=ffff8880102df6d8 RSP=ffff8880102df610 R8 =ffffffff864bbb4e R9 =ffff8880102df6c0 R10=0000000000038001 R11=00000000000b6a61 R12=ffff8880102df6e0 R13=ffff8880102df6c8 R14=ffff8880102df6c1 R15=ffff8880102df680 RIP=ffffffff81130881 RFL=00000286 [--S--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 00007f8720f89900 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=00007ffef5a58000 CR3=00000000179a8000 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