[ 42.381840] BUG: Bad rss-counter state mm:0000000056ba50c0 type:MM_FILEPAGES val:33 [ 42.383285] BUG: Bad rss-counter state mm:0000000056ba50c0 type:MM_ANONPAGES val:22 [ 42.557549] ================================================================== [ 42.558475] BUG: KASAN: slab-use-after-free in vma_interval_tree_remove+0xc75/0xec0 [ 42.559417] Read of size 8 at addr ffff888016680798 by task sshd/219 [ 42.560175] [ 42.560488] CPU: 0 PID: 219 Comm: sshd Not tainted 6.4.0-rc7-next-20230619 #1 [ 42.561360] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS 1.12.0-1 04/01/2014 [ 42.562324] Call Trace: [ 42.562672] [ 42.562967] dump_stack_lvl+0x91/0xf0 [ 42.563457] print_report+0xcc/0x620 [ 42.563938] ? __virt_addr_valid+0x102/0x340 [ 42.564487] ? vma_interval_tree_remove+0xc75/0xec0 [ 42.565097] ? vma_interval_tree_remove+0xc75/0xec0 [ 42.565717] kasan_report+0xbe/0xf0 [ 42.566195] ? vma_interval_tree_remove+0xc75/0xec0 [ 42.566821] vma_interval_tree_remove+0xc75/0xec0 [ 42.567435] vma_prepare+0xc54/0x11a0 [ 42.567917] __split_vma+0x5af/0x950 [ 42.568389] ? __pfx___split_vma+0x10/0x10 [ 42.568922] ? find_held_lock+0x2c/0x110 [ 42.569441] do_vmi_align_munmap+0x2ba/0x11f0 [ 42.570007] ? lock_is_held_type+0x9f/0x120 [ 42.570544] ? __pfx_do_vmi_align_munmap+0x10/0x10 [ 42.571172] ? mtree_range_walk+0x632/0x900 [ 42.571720] ? mas_walk+0x5c7/0x7c0 [ 42.572187] do_vmi_munmap+0x1f1/0x2b0 [ 42.572682] mmap_region+0x1f9/0x2660 [ 42.573165] ? vm_mmap_pgoff+0x15c/0x3a0 [ 42.573671] ? __pfx_arch_get_unmapped_area_topdown+0x10/0x10 [ 42.574373] ? __pfx_lock_acquire+0x10/0x10 [ 42.574899] ? __pfx_mmap_region+0x10/0x10 [ 42.575435] ? security_mmap_addr+0x7d/0xa0 [ 42.575970] ? get_unmapped_area+0x1f5/0x3f0 [ 42.576511] do_mmap+0x854/0xf00 [ 42.576952] vm_mmap_pgoff+0x1a6/0x3a0 [ 42.577448] ? __pfx_vm_mmap_pgoff+0x10/0x10 [ 42.578010] ksys_mmap_pgoff+0x3af/0x500 [ 42.578517] do_syscall_64+0x3f/0x90 [ 42.578996] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 42.579645] RIP: 0033:0x7f74e4adfd82 [ 42.580111] 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 [ 42.582203] RSP: 002b:00007ffe8cb800c8 EFLAGS: 00000206 ORIG_RAX: 0000000000000009 [ 42.583116] RAX: ffffffffffffffda RBX: 0000000000000812 RCX: 00007f74e4adfd82 [ 42.583962] RDX: 0000000000000005 RSI: 0000000000001000 RDI: 00007f74e3f19000 [ 42.584806] RBP: 00007f74e3f19000 R08: 0000000000000009 R09: 0000000000001000 [ 42.585648] R10: 0000000000000812 R11: 0000000000000206 R12: 000055ca11c0cf70 [ 42.586489] R13: 00007ffe8cb800e0 R14: 00007ffe8cb80110 R15: 00007ffe8cb80470 [ 42.587358] [ 42.587648] [ 42.587863] Allocated by task 212: [ 42.588295] kasan_save_stack+0x22/0x50 [ 42.588796] kasan_set_track+0x25/0x30 [ 42.589297] __kasan_slab_alloc+0x59/0x70 [ 42.589816] kmem_cache_alloc+0x16b/0x370 [ 42.590327] vm_area_dup+0x20/0x160 [ 42.590782] __split_vma+0x170/0x950 [ 42.591262] split_vma+0xc6/0x110 [ 42.591700] mprotect_fixup+0x8d2/0xb30 [ 42.592201] do_mprotect_pkey+0x87e/0xd40 [ 42.592716] __x64_sys_mprotect+0x78/0xc0 [ 42.593237] do_syscall_64+0x3f/0x90 [ 42.593708] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 42.594345] [ 42.594561] Freed by task 13: [ 42.594961] kasan_save_stack+0x22/0x50 [ 42.595467] kasan_set_track+0x25/0x30 [ 42.595964] kasan_save_free_info+0x2b/0x50 [ 42.596495] __kasan_slab_free+0x10a/0x190 [ 42.597024] kmem_cache_free+0x10d/0x4d0 [ 42.597525] rcu_core+0x8c8/0x2860 [ 42.597964] __do_softirq+0x1b7/0x7d4 [ 42.598432] [ 42.598650] Last potentially related work creation: [ 42.599234] kasan_save_stack+0x22/0x50 [ 42.599737] __kasan_record_aux_stack+0x8e/0xa0 [ 42.600311] __call_rcu_common.constprop.0+0x6a/0xb90 [ 42.600948] remove_vma+0x139/0x170 [ 42.601395] do_vmi_align_munmap+0xd4a/0x11f0 [ 42.601951] do_vmi_munmap+0x1f1/0x2b0 [ 42.602435] __vm_munmap+0x138/0x3a0 [ 42.602897] __x64_sys_munmap+0x59/0x80 [ 42.603417] do_syscall_64+0x3f/0x90 [ 42.603891] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 42.604528] [ 42.604743] The buggy address belongs to the object at ffff888016680740 [ 42.604743] which belongs to the cache vm_area_struct of size 168 [ 42.606189] The buggy address is located 88 bytes inside of [ 42.606189] freed 168-byte region [ffff888016680740, ffff8880166807e8) [ 42.607587] [ 42.607803] The buggy address belongs to the physical page: [ 42.608457] page:00000000ff436780 refcount:1 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0x16680 [ 42.609544] memcg:ffff88800ba3f001 [ 42.609971] flags: 0x100000000000200(slab|node=0|zone=1) [ 42.610623] page_type: 0xffffffff() [ 42.611082] raw: 0100000000000200 ffff88800879fc80 dead000000000122 0000000000000000 [ 42.611989] raw: 0000000000000000 0000000000110011 00000001ffffffff ffff88800ba3f001 [ 42.612886] page dumped because: kasan: bad access detected [ 42.613545] [ 42.613760] Memory state around the buggy address: [ 42.614332] ffff888016680680: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 [ 42.615203] ffff888016680700: fc fc fc fc fc fc fc fc fa fb fb fb fb fb fb fb [ 42.616050] >ffff888016680780: fb fb fb fb fb fb fb fb fb fb fb fb fb fc fc fc [ 42.616891] ^ [ 42.617378] ffff888016680800: fc fc fc fc fc fa fb fb fb fb fb fb fb fb fb fb [ 42.618236] ffff888016680880: fb fb fb fb fb fb fb fb fb fb fc fc fc fc fc fc [ 42.619095] ================================================================== [ 42.620125] Disabling lock debugging due to kernel taint Debian GNU/Linux 11 syzkaller ttyS0 syzkaller login: [ 44.951376] BUG: Bad rss-counter state mm:000000005000492f type:MM_FILEPAGES val:33 [ 44.953012] BUG: Bad rss-counter state mm:000000005000492f type:MM_ANONPAGES val:22 [ 45.457940] BUG: Bad rss-counter state mm:0000000008449add type:MM_FILEPAGES val:33 [ 45.459127] BUG: Bad rss-counter state mm:0000000008449add type:MM_ANONPAGES val:22 Warning: Permanently added '[localhost]:30855' (ECDSA) to the list of known hosts. 2023/06/19 18:03:27 fuzzer started 2023/06/19 18:03:27 dialing manager at localhost:44161 2023/06/19 18:03:27 checking machine... 2023/06/19 18:03:27 checking revisions... [ 46.189819] kmemleak: Automatic memory scanning thread ended 2023/06/19 18:03:27 testing simple program... [ 46.236357] cgroup: Unknown subsys name 'net' [ 46.277457] cgroup: Unknown subsys name 'rlimit' executing program executing program executing program VM DIAGNOSIS: 18:03:08 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=0000000000000001 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=00007ffd636e9f88 CR3=00000000193c2000 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=2037323a33303a3831203931206e754a XMM01=73732878696e755f6d6170203a5d3832 XMM02=65736f6c63206e6f6973736573203a29 XMM03=755f6d6170203a5d3832325b64687373 XMM04=69662068637573206f4e203a656c6163 XMM05=3a656c696620766e65206e65706f206f XMM06=65733a6468737328766e655f6d617020 XMM07=6b7a79732036323a33303a3831203931 XMM08=3d656e696c646d632022656369767265 XMM09=00000000000000000000000000000000 XMM10=00000000000000000000000000000000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000 info registers vcpu 1 RAX=ffffffff8180c8da RBX=ffffffff813ad420 RCX=ffffffff86137d01 RDX=1ffff1100d9e135e RSI=ffffffff8180c8da RDI=ffff88806cf09b60 RBP=ffff88806cf09b30 RSP=ffff88806cf09a90 R8 =ffffffff86137dd6 R9 =ffff88806cf09ad8 R10=0000000000038001 R11=0000000000020f00 R12=ffff88806cf09b60 R13=0000000000000000 R14=ffff88801653d1c0 R15=ffff8880096a9000 RIP=ffffffff813ad420 RFL=00000282 [--S----] 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 00007fd73aefb900 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=00007ffcb73b1000 CR3=000000001ce14000 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