[ 24.023760] BUG: Bad rss-counter state mm:0000000007646a7f type:MM_FILEPAGES val:33 [ 24.025259] BUG: Bad rss-counter state mm:0000000007646a7f type:MM_ANONPAGES val:22 Debian GNU/Linux 11 syzkaller ttyS0 syzkaller login: [ 24.082887] ================================================================== [ 24.083782] BUG: KASAN: slab-use-after-free in vma_interval_tree_remove+0xc75/0xec0 [ 24.084712] Read of size 8 at addr ffff88800ee353f8 by task sshd/220 [ 24.085487] [ 24.085711] CPU: 1 PID: 220 Comm: sshd Not tainted 6.4.0-rc7-next-20230620 #1 [ 24.086808] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS 1.12.0-1 04/01/2014 [ 24.087819] Call Trace: [ 24.088153] [ 24.088460] dump_stack_lvl+0x91/0xf0 [ 24.088999] print_report+0xcc/0x620 [ 24.089514] ? __virt_addr_valid+0x102/0x340 [ 24.090111] ? vma_interval_tree_remove+0xc75/0xec0 [ 24.090809] ? vma_interval_tree_remove+0xc75/0xec0 [ 24.091494] kasan_report+0xbe/0xf0 [ 24.092045] ? vma_interval_tree_remove+0xc75/0xec0 [ 24.092797] vma_interval_tree_remove+0xc75/0xec0 [ 24.093449] vma_prepare+0xc54/0x11a0 [ 24.093961] __split_vma+0x5af/0x950 [ 24.094514] ? __pfx___split_vma+0x10/0x10 [ 24.095083] ? find_held_lock+0x2c/0x110 [ 24.095634] do_vmi_align_munmap+0x2ba/0x11f0 [ 24.096239] ? lock_is_held_type+0x9f/0x120 [ 24.096827] ? __pfx_do_vmi_align_munmap+0x10/0x10 [ 24.097488] ? mtree_range_walk+0x632/0x900 [ 24.098069] ? mas_walk+0x5c7/0x7c0 [ 24.098592] do_vmi_munmap+0x1f1/0x2b0 [ 24.099120] mmap_region+0x1f9/0x2660 [ 24.099649] ? vm_mmap_pgoff+0x15c/0x3a0 [ 24.100253] ? __pfx_arch_get_unmapped_area_topdown+0x10/0x10 [ 24.101069] ? __pfx_lock_acquire+0x10/0x10 [ 24.101698] ? __pfx_mmap_region+0x10/0x10 [ 24.102321] ? security_mmap_addr+0x7d/0xa0 [ 24.102948] ? get_unmapped_area+0x1f5/0x3f0 [ 24.103597] do_mmap+0x854/0xf00 [ 24.104117] vm_mmap_pgoff+0x1a6/0x3a0 [ 24.104702] ? __pfx_vm_mmap_pgoff+0x10/0x10 [ 24.105366] ksys_mmap_pgoff+0x3af/0x500 [ 24.105954] do_syscall_64+0x3f/0x90 [ 24.106531] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 24.107297] RIP: 0033:0x7fc15795cd82 [ 24.107837] 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 [ 24.110370] RSP: 002b:00007ffe935faae8 EFLAGS: 00000206 ORIG_RAX: 0000000000000009 [ 24.111471] RAX: ffffffffffffffda RBX: 0000000000000812 RCX: 00007fc15795cd82 [ 24.112479] RDX: 0000000000000005 RSI: 0000000000001000 RDI: 00007fc156d96000 [ 24.113490] RBP: 00007fc156d96000 R08: 0000000000000009 R09: 0000000000001000 [ 24.114516] R10: 0000000000000812 R11: 0000000000000206 R12: 0000564506eeed90 [ 24.115539] R13: 00007ffe935fab00 R14: 00007ffe935fab30 R15: 00007ffe935fae90 [ 24.116563] [ 24.116907] [ 24.117156] Allocated by task 213: [ 24.117680] kasan_save_stack+0x22/0x50 [ 24.118276] kasan_set_track+0x25/0x30 [ 24.118873] __kasan_slab_alloc+0x59/0x70 [ 24.119484] kmem_cache_alloc+0x16b/0x370 [ 24.120073] vm_area_dup+0x20/0x160 [ 24.120661] __split_vma+0x170/0x950 [ 24.121236] split_vma+0xc6/0x110 [ 24.121777] mprotect_fixup+0x8d2/0xb30 [ 24.122393] do_mprotect_pkey+0x87e/0xd40 [ 24.123046] __x64_sys_mprotect+0x78/0xc0 [ 24.123688] do_syscall_64+0x3f/0x90 [ 24.124274] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 24.125055] [ 24.125327] Freed by task 19: [ 24.125800] kasan_save_stack+0x22/0x50 [ 24.126421] kasan_set_track+0x25/0x30 [ 24.127059] kasan_save_free_info+0x2b/0x50 [ 24.127794] __kasan_slab_free+0x10a/0x190 [ 24.128442] kmem_cache_free+0x10d/0x4d0 [ 24.129073] rcu_core+0x8c8/0x2860 [ 24.129628] __do_softirq+0x1b7/0x7d4 [ 24.130204] [ 24.130483] Last potentially related work creation: [ 24.131208] kasan_save_stack+0x22/0x50 [ 24.131835] __kasan_record_aux_stack+0x8e/0xa0 [ 24.132537] __call_rcu_common.constprop.0+0x6a/0xb90 [ 24.133328] remove_vma+0x139/0x170 [ 24.133892] do_vmi_align_munmap+0xd4a/0x11f0 [ 24.134597] do_vmi_munmap+0x1f1/0x2b0 [ 24.135189] __vm_munmap+0x138/0x3a0 [ 24.135767] __x64_sys_munmap+0x59/0x80 [ 24.136381] do_syscall_64+0x3f/0x90 [ 24.136963] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 24.137771] [ 24.138026] The buggy address belongs to the object at ffff88800ee353a0 [ 24.138026] which belongs to the cache vm_area_struct of size 168 [ 24.139711] The buggy address is located 88 bytes inside of [ 24.139711] freed 168-byte region [ffff88800ee353a0, ffff88800ee35448) [ 24.141142] [ 24.141369] The buggy address belongs to the physical page: [ 24.142043] page:00000000343e2a24 refcount:1 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0xee35 [ 24.143241] memcg:ffff88800db01301 [ 24.143706] anon flags: 0x100000000000200(slab|node=0|zone=1) [ 24.144476] page_type: 0xffffffff() [ 24.144986] raw: 0100000000000200 ffff8880087a0c80 0000000000000000 dead000000000001 [ 24.146008] raw: 0000000000000000 0000000000110011 00000001ffffffff ffff88800db01301 [ 24.147015] page dumped because: kasan: bad access detected [ 24.147745] [ 24.147984] Memory state around the buggy address: [ 24.148640] ffff88800ee35280: fc fc fc fc fc fc fc 00 00 00 00 00 00 00 00 00 [ 24.149580] ffff88800ee35300: 00 00 00 00 00 00 00 00 00 00 00 00 fc fc fc fc [ 24.150543] >ffff88800ee35380: fc fc fc fc fa fb fb fb fb fb fb fb fb fb fb fb [ 24.151478] ^ [ 24.152396] ffff88800ee35400: fb fb fb fb fb fb fb fb fb fc fc fc fc fc fc fc [ 24.153349] ffff88800ee35480: fc 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 [ 24.154270] ================================================================== [ 24.155323] Disabling lock debugging due to kernel taint [ 26.234158] BUG: Bad rss-counter state mm:00000000a52208dc type:MM_FILEPAGES val:33 [ 26.235167] BUG: Bad rss-counter state mm:00000000a52208dc type:MM_ANONPAGES val:22 [ 26.722949] BUG: Bad rss-counter state mm:00000000f5ec6216 type:MM_FILEPAGES val:33 [ 26.723976] BUG: Bad rss-counter state mm:00000000f5ec6216 type:MM_ANONPAGES val:22 Warning: Permanently added '[localhost]:1804' (ECDSA) to the list of known hosts. 2023/06/20 14:50:40 fuzzer started 2023/06/20 14:50:40 dialing manager at localhost:36067 2023/06/20 14:50:40 checking machine... 2023/06/20 14:50:40 checking revisions... [ 27.352771] kmemleak: Automatic memory scanning thread ended 2023/06/20 14:50:40 testing simple program... [ 27.398955] cgroup: Unknown subsys name 'net' [ 27.439145] cgroup: Unknown subsys name 'rlimit' executing program executing program executing program VM DIAGNOSIS: 14:50:40 Registers: info registers vcpu 0 RAX=1ffffffff0bc1180 RBX=ffffffff85e08c00 RCX=ffffffff818abfa1 RDX=0000000000000000 RSI=ffffffff8614904a RDI=ffffffff85e08bf0 RBP=ffffffff85e08bf0 RSP=ffff8880165978d0 R8 =ffffffff8614904a R9 =ffff8880165979c8 R10=0000000000038001 R11=000000000002388b R12=ffffffff85e08c14 R13=ffffffff85e08bf0 R14=ffffffff85e08bf0 R15=dffffc0000000000 RIP=ffffffff8112fc7f RFL=00000212 [----A--] 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 00007f49a7bee900 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=00007f49a81a3650 CR3=000000000e0d8000 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=0000000000000000 RBX=0000000000000001 RCX=0000000000000000 RDX=0000000000000000 RSI=ffffffff813bdec2 RDI=ffff88800847e02c RBP=ffff88806cf39500 RSP=ffff88806cf09d30 R8 =ffff88806cf39f70 R9 =000000000000c1ea R10=000000000000c1ea R11=0000000000000001 R12=0000000000039500 R13=ffff88800847e000 R14=ffff8880102c1b40 R15=ffff88806cf395c0 RIP=ffffffff8125e7f8 RFL=00000046 [---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 00007f0371276900 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=00007f03706ead40 CR3=000000001006e000 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=b116c96c5f966ca0c34d80e03df7616c XMM02=eff9b2d0a8fce9cb000000000011bd00 XMM03=2c67c8bc2e329bc3000000000011be28 XMM04=ee4e24ea646060ee00000000000ae988 XMM05=793697b2ac94b65e00000000001337e8 XMM06=19e9129bd510f23500000000001322d8 XMM07=fb795ef6d657705600000000001224e0 XMM08=2c67c8bc2e329bc3000000000011be28 XMM09=00000000000000000000000000000000 XMM10=00000000000000000000000000000000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000