[ 31.011715] BUG: Bad rss-counter state mm:0000000042f64b3a type:MM_FILEPAGES val:33 [ 31.012856] BUG: Bad rss-counter state mm:0000000042f64b3a type:MM_ANONPAGES val:22 [ 31.054140] ================================================================== [ 31.055050] BUG: KASAN: slab-use-after-free in vma_interval_tree_remove+0xc75/0xec0 [ 31.055996] Read of size 8 at addr ffff88800ddf05c8 by task sshd/219 [ 31.056771] [ 31.056994] CPU: 0 PID: 219 Comm: sshd Not tainted 6.4.0-rc7-next-20230620 #1 [ 31.057909] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS 1.12.0-1 04/01/2014 [ 31.058900] Call Trace: [ 31.059226] [ 31.059512] dump_stack_lvl+0x91/0xf0 [ 31.060006] print_report+0xcc/0x620 [ 31.060495] ? __virt_addr_valid+0x102/0x340 [ 31.061049] ? vma_interval_tree_remove+0xc75/0xec0 [ 31.061711] ? vma_interval_tree_remove+0xc75/0xec0 [ 31.062367] kasan_report+0xbe/0xf0 [ 31.062847] ? vma_interval_tree_remove+0xc75/0xec0 [ 31.063474] vma_interval_tree_remove+0xc75/0xec0 [ 31.064080] vma_prepare+0xc54/0x11a0 [ 31.064556] __split_vma+0x5af/0x950 [ 31.065037] ? __pfx___split_vma+0x10/0x10 [ 31.065605] ? find_held_lock+0x2c/0x110 [ 31.066138] do_vmi_align_munmap+0x2ba/0x11f0 [ 31.066704] ? lock_is_held_type+0x9f/0x120 [ 31.067243] ? __pfx_do_vmi_align_munmap+0x10/0x10 [ 31.067853] ? mtree_range_walk+0x632/0x900 [ 31.068409] ? mas_walk+0x5c7/0x7c0 [ 31.068890] do_vmi_munmap+0x1f1/0x2b0 [ 31.069417] mmap_region+0x1f9/0x2660 [ 31.069931] ? vm_mmap_pgoff+0x15c/0x3a0 [ 31.070451] ? __pfx_arch_get_unmapped_area_topdown+0x10/0x10 [ 31.071169] ? __pfx_lock_acquire+0x10/0x10 [ 31.071697] ? __pfx_mmap_region+0x10/0x10 [ 31.072224] ? security_mmap_addr+0x7d/0xa0 [ 31.072749] ? get_unmapped_area+0x1f5/0x3f0 [ 31.073295] do_mmap+0x854/0xf00 [ 31.073772] vm_mmap_pgoff+0x1a6/0x3a0 [ 31.074288] ? __pfx_vm_mmap_pgoff+0x10/0x10 [ 31.074850] ksys_mmap_pgoff+0x3af/0x500 [ 31.075357] do_syscall_64+0x3f/0x90 [ 31.075836] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 31.076481] RIP: 0033:0x7f2a5bcf3d82 [ 31.076936] 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 [ 31.079097] RSP: 002b:00007ffd1af08298 EFLAGS: 00000206 ORIG_RAX: 0000000000000009 [ 31.079985] RAX: ffffffffffffffda RBX: 0000000000000812 RCX: 00007f2a5bcf3d82 [ 31.080826] RDX: 0000000000000005 RSI: 0000000000001000 RDI: 00007f2a5b12d000 [ 31.081810] RBP: 00007f2a5b12d000 R08: 0000000000000009 R09: 0000000000001000 [ 31.082664] R10: 0000000000000812 R11: 0000000000000206 R12: 00005565c4e78ec0 [ 31.083508] R13: 00007ffd1af082b0 R14: 00007ffd1af082e0 R15: 00007ffd1af08640 [ 31.084356] [ 31.084650] [ 31.084865] Allocated by task 212: [ 31.085288] kasan_save_stack+0x22/0x50 [ 31.085824] kasan_set_track+0x25/0x30 [ 31.086327] __kasan_slab_alloc+0x59/0x70 [ 31.086844] kmem_cache_alloc+0x16b/0x370 [ 31.087355] vm_area_dup+0x20/0x160 [ 31.087807] __split_vma+0x170/0x950 [ 31.088266] split_vma+0xc6/0x110 [ 31.088697] mprotect_fixup+0x8d2/0xb30 [ 31.089189] do_mprotect_pkey+0x87e/0xd40 [ 31.089746] __x64_sys_mprotect+0x78/0xc0 [ 31.090279] do_syscall_64+0x3f/0x90 [ 31.090746] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 31.091379] [ 31.091594] Freed by task 212: [ 31.091983] kasan_save_stack+0x22/0x50 [ 31.092478] kasan_set_track+0x25/0x30 [ 31.092965] kasan_save_free_info+0x2b/0x50 [ 31.093529] __kasan_slab_free+0x10a/0x190 [ 31.094080] kmem_cache_free+0x10d/0x4d0 [ 31.094581] rcu_core+0x8c8/0x2860 [ 31.095032] __do_softirq+0x1b7/0x7d4 [ 31.095514] [ 31.095732] Last potentially related work creation: [ 31.096305] kasan_save_stack+0x22/0x50 [ 31.096801] __kasan_record_aux_stack+0x8e/0xa0 [ 31.097390] __call_rcu_common.constprop.0+0x6a/0xb90 [ 31.098058] remove_vma+0x139/0x170 [ 31.098504] do_vmi_align_munmap+0xd4a/0x11f0 [ 31.099066] do_vmi_munmap+0x1f1/0x2b0 [ 31.099544] __vm_munmap+0x138/0x3a0 [ 31.100001] __x64_sys_munmap+0x59/0x80 [ 31.100493] do_syscall_64+0x3f/0x90 [ 31.100962] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 31.101635] [ 31.101851] Second to last potentially related work creation: [ 31.102530] kasan_save_stack+0x22/0x50 [ 31.103028] __kasan_record_aux_stack+0x8e/0xa0 [ 31.103589] __call_rcu_common.constprop.0+0x6a/0xb90 [ 31.104216] remove_vma+0x139/0x170 [ 31.104665] do_vmi_align_munmap+0xd4a/0x11f0 [ 31.105214] do_vmi_munmap+0x1f1/0x2b0 [ 31.105737] mmap_region+0x1f9/0x2660 [ 31.106229] do_mmap+0x854/0xf00 [ 31.106656] vm_mmap_pgoff+0x1a6/0x3a0 [ 31.107140] ksys_mmap_pgoff+0x3af/0x500 [ 31.107631] do_syscall_64+0x3f/0x90 [ 31.108095] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 31.108725] [ 31.108942] The buggy address belongs to the object at ffff88800ddf0570 [ 31.108942] which belongs to the cache vm_area_struct of size 168 [ 31.110447] The buggy address is located 88 bytes inside of [ 31.110447] freed 168-byte region [ffff88800ddf0570, ffff88800ddf0618) [ 31.111818] [ 31.112036] The buggy address belongs to the physical page: [ 31.112672] page:0000000042b6efaf refcount:1 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0xddf0 [ 31.113762] memcg:ffff88800db02601 [ 31.114199] anon flags: 0x100000000000200(slab|node=0|zone=1) [ 31.114882] page_type: 0xffffffff() [ 31.115322] raw: 0100000000000200 ffff8880087a0c80 ffffea000063bc00 dead00000000000d [ 31.116208] raw: 0000000000000000 0000000000110011 00000001ffffffff ffff88800db02601 [ 31.117083] page dumped because: kasan: bad access detected [ 31.117755] [ 31.117979] Memory state around the buggy address: [ 31.118543] ffff88800ddf0480: fc 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 [ 31.119371] ffff88800ddf0500: 00 00 00 00 00 00 fc fc fc fc fc fc fc fc fa fb [ 31.120197] >ffff88800ddf0580: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb [ 31.121020] ^ [ 31.121696] ffff88800ddf0600: fb fb fb fc fc fc fc fc fc fc fc 00 00 00 00 00 [ 31.122543] ffff88800ddf0680: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 [ 31.123367] ================================================================== [ 31.124406] Disabling lock debugging due to kernel taint Debian GNU/Linux 11 syzkaller ttyS0 syzkaller login: [ 32.520823] BUG: Bad rss-counter state mm:000000009e6369e2 type:MM_FILEPAGES val:33 [ 32.522344] BUG: Bad rss-counter state mm:000000009e6369e2 type:MM_ANONPAGES val:22 [ 32.993423] BUG: Bad rss-counter state mm:000000006df726c9 type:MM_FILEPAGES val:33 [ 32.994601] BUG: Bad rss-counter state mm:000000006df726c9 type:MM_ANONPAGES val:22 Warning: Permanently added '[localhost]:52814' (ECDSA) to the list of known hosts. 2023/06/20 18:01:48 fuzzer started 2023/06/20 18:01:48 dialing manager at localhost:36067 2023/06/20 18:01:48 checking machine... 2023/06/20 18:01:48 checking revisions... [ 33.700649] kmemleak: Automatic memory scanning thread ended 2023/06/20 18:01:48 testing simple program... [ 33.742815] cgroup: Unknown subsys name 'net' [ 33.783065] cgroup: Unknown subsys name 'rlimit' executing program executing program executing program VM DIAGNOSIS: 18:01:48 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=00007f618f75bdd0 CR3=000000000ebfe000 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=2038343a31303a3831203032206e754a XMM01=73732878696e755f6d6170203a5d3832 XMM02=65736f6c63206e6f6973736573203a29 XMM03=755f6d6170203a5d3832325b64687373 XMM04=69662068637573206f4e203a656c6163 XMM05=3a656c696620766e65206e65706f206f XMM06=65733a6468737328766e655f6d617020 XMM07=6b7a79732037343a31303a3831203032 XMM08=3d656e696c646d632022656369767265 XMM09=00000000000000000000000000000000 XMM10=00000000000000000000000000000000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000 info registers vcpu 1 RAX=dffffc0000000000 RBX=0000000000000001 RCX=ffffffff86138eb0 RDX=1ffff1100192de54 RSI=0000000000000001 RDI=0000000000000001 RBP=ffff88800c96f2b0 RSP=ffff88800c96f1e8 R8 =ffffffff86138eb4 R9 =ffff88800c96f298 R10=0000000000038001 R11=0000000000020d9c R12=ffff88800c96f2b8 R13=ffff88800c96f2a0 R14=0000000000000005 R15=ffff88800c96f258 RIP=ffffffff81130b54 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 =0018 0000000000000000 ffffffff 00c09300 DPL=0 DS [-WA] DS =0000 0000000000000000 00000000 00000000 FS =0000 00007fcd421e2900 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=00007fff5f7f4000 CR3=000000000ecda000 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=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