[ 24.346747] BUG: Bad rss-counter state mm:0000000040f55087 type:MM_FILEPAGES val:33 [ 24.347884] BUG: Bad rss-counter state mm:0000000040f55087 type:MM_ANONPAGES val:22 [ 24.504511] ================================================================== [ 24.505407] BUG: KASAN: slab-use-after-free in vma_interval_tree_remove+0xc75/0xec0 [ 24.506343] Read of size 8 at addr ffff88800e0f9968 by task sshd/218 [ 24.507204] [ 24.507420] CPU: 0 PID: 218 Comm: sshd Not tainted 6.4.0-rc7-next-20230619 #1 [ 24.508284] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS 1.12.0-1 04/01/2014 [ 24.509327] Call Trace: [ 24.509655] [ 24.509950] dump_stack_lvl+0x91/0xf0 [ 24.510464] print_report+0xcc/0x620 [ 24.510949] ? __virt_addr_valid+0x102/0x340 [ 24.511508] ? vma_interval_tree_remove+0xc75/0xec0 [ 24.512131] ? vma_interval_tree_remove+0xc75/0xec0 [ 24.512751] kasan_report+0xbe/0xf0 [ 24.513229] ? vma_interval_tree_remove+0xc75/0xec0 [ 24.513857] vma_interval_tree_remove+0xc75/0xec0 [ 24.514498] vma_prepare+0xc54/0x11a0 [ 24.514977] __split_vma+0x5af/0x950 [ 24.515452] ? __pfx___split_vma+0x10/0x10 [ 24.516002] ? find_held_lock+0x2c/0x110 [ 24.516534] do_vmi_align_munmap+0x2ba/0x11f0 [ 24.517109] ? lock_is_held_type+0x9f/0x120 [ 24.517649] ? __pfx_do_vmi_align_munmap+0x10/0x10 [ 24.518278] ? mtree_range_walk+0x632/0x900 [ 24.518882] ? mas_walk+0x5c7/0x7c0 [ 24.519383] do_vmi_munmap+0x1f1/0x2b0 [ 24.519880] mmap_region+0x1f9/0x2660 [ 24.520382] ? vm_mmap_pgoff+0x15c/0x3a0 [ 24.520902] ? __pfx_arch_get_unmapped_area_topdown+0x10/0x10 [ 24.521651] ? __pfx_lock_acquire+0x10/0x10 [ 24.522213] ? __pfx_mmap_region+0x10/0x10 [ 24.522752] ? security_mmap_addr+0x7d/0xa0 [ 24.523280] ? get_unmapped_area+0x1f5/0x3f0 [ 24.523833] do_mmap+0x854/0xf00 [ 24.524274] vm_mmap_pgoff+0x1a6/0x3a0 [ 24.524773] ? __pfx_vm_mmap_pgoff+0x10/0x10 [ 24.525333] ksys_mmap_pgoff+0x3af/0x500 [ 24.525849] do_syscall_64+0x3f/0x90 [ 24.526357] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 24.527024] RIP: 0033:0x7f530b347d82 [ 24.527484] 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 [ 24.529649] RSP: 002b:00007ffdc848cbb8 EFLAGS: 00000206 ORIG_RAX: 0000000000000009 [ 24.530578] RAX: ffffffffffffffda RBX: 0000000000000812 RCX: 00007f530b347d82 [ 24.531433] RDX: 0000000000000005 RSI: 0000000000001000 RDI: 00007f530a781000 [ 24.532284] RBP: 00007f530a781000 R08: 0000000000000009 R09: 0000000000001000 [ 24.533141] R10: 0000000000000812 R11: 0000000000000206 R12: 000055903080bec0 [ 24.534010] R13: 00007ffdc848cbd0 R14: 00007ffdc848cc00 R15: 00007ffdc848cf60 [ 24.534903] [ 24.535207] [ 24.535428] Allocated by task 211: [ 24.535879] kasan_save_stack+0x22/0x50 [ 24.536396] kasan_set_track+0x25/0x30 [ 24.536887] __kasan_slab_alloc+0x59/0x70 [ 24.537405] kmem_cache_alloc+0x16b/0x370 [ 24.537919] vm_area_dup+0x20/0x160 [ 24.538379] __split_vma+0x170/0x950 [ 24.538843] split_vma+0xc6/0x110 [ 24.539281] mprotect_fixup+0x8d2/0xb30 [ 24.539783] do_mprotect_pkey+0x87e/0xd40 [ 24.540304] __x64_sys_mprotect+0x78/0xc0 [ 24.540824] do_syscall_64+0x3f/0x90 [ 24.541299] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 24.541930] [ 24.542147] Freed by task 211: [ 24.542552] kasan_save_stack+0x22/0x50 [ 24.543054] kasan_set_track+0x25/0x30 [ 24.543546] kasan_save_free_info+0x2b/0x50 [ 24.544083] __kasan_slab_free+0x10a/0x190 [ 24.544621] kmem_cache_free+0x10d/0x4d0 [ 24.545166] rcu_core+0x8c8/0x2860 [ 24.545619] __do_softirq+0x1b7/0x7d4 [ 24.546088] [ 24.546308] Last potentially related work creation: [ 24.546909] kasan_save_stack+0x22/0x50 [ 24.547431] __kasan_record_aux_stack+0x8e/0xa0 [ 24.548007] __call_rcu_common.constprop.0+0x6a/0xb90 [ 24.548658] remove_vma+0x139/0x170 [ 24.549113] do_vmi_align_munmap+0xd4a/0x11f0 [ 24.549677] do_vmi_munmap+0x1f1/0x2b0 [ 24.550162] __vm_munmap+0x138/0x3a0 [ 24.550654] __x64_sys_munmap+0x59/0x80 [ 24.551159] do_syscall_64+0x3f/0x90 [ 24.551638] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 24.552284] [ 24.552500] The buggy address belongs to the object at ffff88800e0f9910 [ 24.552500] which belongs to the cache vm_area_struct of size 168 [ 24.554013] The buggy address is located 88 bytes inside of [ 24.554013] freed 168-byte region [ffff88800e0f9910, ffff88800e0f99b8) [ 24.555490] [ 24.555705] The buggy address belongs to the physical page: [ 24.556396] page:00000000f678f2cb refcount:1 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0xe0f9 [ 24.557511] memcg:ffff88800e1c9501 [ 24.557943] anon flags: 0x100000000000200(slab|node=0|zone=1) [ 24.558668] page_type: 0xffffffff() [ 24.559131] raw: 0100000000000200 ffff88800879fc80 ffffea0000391a80 dead000000000003 [ 24.560070] raw: 0000000000000000 0000000000110011 00000001ffffffff ffff88800e1c9501 [ 24.560999] page dumped because: kasan: bad access detected [ 24.561681] [ 24.561896] Memory state around the buggy address: [ 24.562483] ffff88800e0f9800: fc fc fc fc fc 00 00 00 00 00 00 00 00 00 00 00 [ 24.563372] ffff88800e0f9880: 00 00 00 00 00 00 00 00 00 00 fc fc fc fc fc fc [ 24.564268] >ffff88800e0f9900: fc fc fa fb fb fb fb fb fb fb fb fb fb fb fb fb [ 24.565143] ^ [ 24.565959] ffff88800e0f9980: fb fb fb fb fb fb fb fc fc fc fc fc fc fc fc fa [ 24.566842] ffff88800e0f9a00: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb [ 24.567699] ================================================================== [ 24.568892] Disabling lock debugging due to kernel taint Debian GNU/Linux 11 syzkaller ttyS0 syzkaller login: [ 26.443409] BUG: Bad rss-counter state mm:00000000fe83a9ab type:MM_FILEPAGES val:33 [ 26.444573] BUG: Bad rss-counter state mm:00000000fe83a9ab type:MM_ANONPAGES val:22 [ 26.937702] BUG: Bad rss-counter state mm:00000000c9f0477e type:MM_FILEPAGES val:33 [ 26.938884] BUG: Bad rss-counter state mm:00000000c9f0477e type:MM_ANONPAGES val:22 Warning: Permanently added '[localhost]:51260' (ECDSA) to the list of known hosts. 2023/06/19 20:39:29 fuzzer started 2023/06/19 20:39:30 dialing manager at localhost:44161 2023/06/19 20:39:30 checking machine... 2023/06/19 20:39:30 checking revisions... [ 27.575384] kmemleak: Automatic memory scanning thread ended 2023/06/19 20:39:30 testing simple program... [ 27.631910] cgroup: Unknown subsys name 'net' [ 27.704026] cgroup: Unknown subsys name 'rlimit' executing program executing program executing program VM DIAGNOSIS: 20:39:29 Registers: info registers vcpu 0 RAX=0000000000000000 RBX=0000000000000000 RCX=ffffffff83ab4255 RDX=0000000000000000 RSI=00000000000000be RDI=00000000000000ff RBP=0000000000000000 RSP=ffff888010007500 R8 =0000000000000000 R9 =fffffbfff0ba77da R10=ffffffff85d3bed7 R11=000008af000008af R12=0000000000000000 R13=00000000000000be R14=dffffc0000000000 R15=ffffffff87f94640 RIP=ffffffff814c0388 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 00007f21419c3900 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=00007fff596af000 CR3=000000000d65a000 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=74696d7265705f6d61703d73726f746e XMM02=000000000000000000000000000000ff XMM03=5320444f4854454d5f54505952434e45 XMM04=40404040404040404040404040404040 XMM05=5a5a5a5a5a5a5a5a5a5a5a5a5a5a5a5a XMM06=20202020202020202020202020202020 XMM07=00000000000000000000000000000000 XMM08=61662029286e65706f5f746964756100 XMM09=00000000000000000000000000000000 XMM10=00000000000000000000000000000000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000 info registers vcpu 1 RAX=ffffffff8110261f RBX=ffffffff813ad420 RCX=0000000000000001 RDX=1ffff1100d9e1359 RSI=ffffffff8110261f RDI=ffff88806cf09b38 RBP=ffff88806cf09b08 RSP=ffff88806cf09a68 R8 =0000000000000001 R9 =ffff88806cf09ab0 R10=0000000000038001 R11=000000000000ba99 R12=ffff88806cf09b38 R13=0000000000000000 R14=ffff888008d751c0 R15=ffff888009909500 RIP=ffffffff813ad424 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 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=00007f3ae4bf9850 CR3=000000000fca8000 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=2039323a39333a3032203931206e754a XMM01=73732878696e755f6d6170203a5d3732 XMM02=65736f6c63206e6f6973736573203a29 XMM03=755f6d6170203a5d3732325b64687373 XMM04=69662068637573206f4e203a656c6163 XMM05=3a656c696620766e65206e65706f206f XMM06=65733a6468737328766e655f6d617020 XMM07=6b7a79732039323a39333a3032203931 XMM08=3d656e696c646d632022656369767265 XMM09=00000000000000000000000000000000 XMM10=00000000000000000000000000000000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000