[ 31.348189] BUG: Bad rss-counter state mm:000000008d2a12be type:MM_FILEPAGES val:33 [ 31.349696] BUG: Bad rss-counter state mm:000000008d2a12be type:MM_ANONPAGES val:22 [ 31.507208] ================================================================== [ 31.508288] BUG: KASAN: slab-use-after-free in vma_interval_tree_remove+0xc75/0xec0 [ 31.509429] Read of size 8 at addr ffff88800eea0a50 by task sshd/220 [ 31.510351] [ 31.510569] CPU: 1 PID: 220 Comm: sshd Not tainted 6.4.0-rc7-next-20230620 #1 [ 31.511461] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS 1.12.0-1 04/01/2014 [ 31.512508] Call Trace: [ 31.512835] [ 31.513117] dump_stack_lvl+0x91/0xf0 [ 31.513626] print_report+0xcc/0x620 [ 31.514111] ? __virt_addr_valid+0x102/0x340 [ 31.514670] ? vma_interval_tree_remove+0xc75/0xec0 [ 31.515296] ? vma_interval_tree_remove+0xc75/0xec0 [ 31.515923] kasan_report+0xbe/0xf0 [ 31.516421] ? vma_interval_tree_remove+0xc75/0xec0 [ 31.517042] vma_interval_tree_remove+0xc75/0xec0 [ 31.517652] vma_prepare+0xc54/0x11a0 [ 31.518132] __split_vma+0x5af/0x950 [ 31.518606] ? __pfx___split_vma+0x10/0x10 [ 31.519132] ? find_held_lock+0x2c/0x110 [ 31.519652] do_vmi_align_munmap+0x2ba/0x11f0 [ 31.520217] ? lock_is_held_type+0x9f/0x120 [ 31.520775] ? __pfx_do_vmi_align_munmap+0x10/0x10 [ 31.521379] ? mtree_range_walk+0x632/0x900 [ 31.521936] ? mas_walk+0x5c7/0x7c0 [ 31.522420] do_vmi_munmap+0x1f1/0x2b0 [ 31.522916] mmap_region+0x1f9/0x2660 [ 31.523402] ? vm_mmap_pgoff+0x15c/0x3a0 [ 31.523910] ? __pfx_arch_get_unmapped_area_topdown+0x10/0x10 [ 31.524643] ? __pfx_lock_acquire+0x10/0x10 [ 31.525185] ? __pfx_mmap_region+0x10/0x10 [ 31.525725] ? security_mmap_addr+0x7d/0xa0 [ 31.526263] ? get_unmapped_area+0x1f5/0x3f0 [ 31.526813] do_mmap+0x854/0xf00 [ 31.527260] vm_mmap_pgoff+0x1a6/0x3a0 [ 31.527756] ? __pfx_vm_mmap_pgoff+0x10/0x10 [ 31.528336] ksys_mmap_pgoff+0x3af/0x500 [ 31.528847] do_syscall_64+0x3f/0x90 [ 31.529328] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 31.529983] RIP: 0033:0x7fbba201ed82 [ 31.530442] 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 [ 31.532590] RSP: 002b:00007ffcb9740aa8 EFLAGS: 00000206 ORIG_RAX: 0000000000000009 [ 31.533498] RAX: ffffffffffffffda RBX: 0000000000000812 RCX: 00007fbba201ed82 [ 31.534357] RDX: 0000000000000005 RSI: 0000000000001000 RDI: 00007fbba1458000 [ 31.535215] RBP: 00007fbba1458000 R08: 0000000000000009 R09: 0000000000001000 [ 31.536068] R10: 0000000000000812 R11: 0000000000000206 R12: 0000564fc4ba3ec0 [ 31.536932] R13: 00007ffcb9740ac0 R14: 00007ffcb9740af0 R15: 00007ffcb9740e50 [ 31.537797] [ 31.538087] [ 31.538304] Allocated by task 213: [ 31.538729] kasan_save_stack+0x22/0x50 [ 31.539235] kasan_set_track+0x25/0x30 [ 31.539733] __kasan_slab_alloc+0x59/0x70 [ 31.540262] kmem_cache_alloc+0x16b/0x370 [ 31.540797] vm_area_dup+0x20/0x160 [ 31.541252] __split_vma+0x170/0x950 [ 31.541730] split_vma+0xc6/0x110 [ 31.542176] mprotect_fixup+0x8d2/0xb30 [ 31.542677] do_mprotect_pkey+0x87e/0xd40 [ 31.543204] __x64_sys_mprotect+0x78/0xc0 [ 31.543737] do_syscall_64+0x3f/0x90 [ 31.544227] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 31.544887] [ 31.545102] Freed by task 213: [ 31.545500] kasan_save_stack+0x22/0x50 [ 31.545999] kasan_set_track+0x25/0x30 [ 31.546502] kasan_save_free_info+0x2b/0x50 [ 31.547033] __kasan_slab_free+0x10a/0x190 [ 31.547565] kmem_cache_free+0x10d/0x4d0 [ 31.548074] rcu_core+0x8c8/0x2860 [ 31.548531] __do_softirq+0x1b7/0x7d4 [ 31.549013] [ 31.549227] Last potentially related work creation: [ 31.549813] kasan_save_stack+0x22/0x50 [ 31.550319] __kasan_record_aux_stack+0x8e/0xa0 [ 31.550987] __call_rcu_common.constprop.0+0x6a/0xb90 [ 31.551630] remove_vma+0x139/0x170 [ 31.552087] do_vmi_align_munmap+0xd4a/0x11f0 [ 31.552658] do_vmi_munmap+0x1f1/0x2b0 [ 31.553153] __vm_munmap+0x138/0x3a0 [ 31.553643] __x64_sys_munmap+0x59/0x80 [ 31.554157] do_syscall_64+0x3f/0x90 [ 31.554640] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 31.555278] [ 31.555492] The buggy address belongs to the object at ffff88800eea09f8 [ 31.555492] which belongs to the cache vm_area_struct of size 168 [ 31.556968] The buggy address is located 88 bytes inside of [ 31.556968] freed 168-byte region [ffff88800eea09f8, ffff88800eea0aa0) [ 31.558407] [ 31.558624] The buggy address belongs to the physical page: [ 31.559282] page:00000000e8ad16f6 refcount:1 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0xeea0 [ 31.560393] memcg:ffff888013f4c901 [ 31.560833] anon flags: 0x100000000000200(slab|node=0|zone=1) [ 31.561553] page_type: 0xffffffff() [ 31.562014] raw: 0100000000000200 ffff8880087a0c80 ffffea0000407240 dead000000000009 [ 31.562942] raw: 0000000000000000 0000000000110011 00000001ffffffff ffff888013f4c901 [ 31.563873] page dumped because: kasan: bad access detected [ 31.564549] [ 31.564763] Memory state around the buggy address: [ 31.565362] ffff88800eea0900: fc fc 00 00 00 00 00 00 00 00 00 00 00 00 00 00 [ 31.566230] ffff88800eea0980: 00 00 00 00 00 00 00 fc fc fc fc fc fc fc fc fa [ 31.567092] >ffff88800eea0a00: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb [ 31.567948] ^ [ 31.568655] ffff88800eea0a80: fb fb fb fb fc fc fc fc fc fc fc fc fa fb fb fb [ 31.569515] ffff88800eea0b00: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb [ 31.570378] ================================================================== [ 31.571306] Disabling lock debugging due to kernel taint Debian GNU/Linux 11 syzkaller ttyS0 syzkaller login: [ 33.847208] BUG: Bad rss-counter state mm:00000000603f928e type:MM_FILEPAGES val:33 [ 33.848791] BUG: Bad rss-counter state mm:00000000603f928e type:MM_ANONPAGES val:22 [ 34.316218] BUG: Bad rss-counter state mm:000000007bbd65a2 type:MM_FILEPAGES val:33 [ 34.317263] BUG: Bad rss-counter state mm:000000007bbd65a2 type:MM_ANONPAGES val:22 Warning: Permanently added '[localhost]:57978' (ECDSA) to the list of known hosts. 2023/06/20 22:15:15 fuzzer started 2023/06/20 22:15:15 dialing manager at localhost:36067 2023/06/20 22:15:15 checking machine... 2023/06/20 22:15:15 checking revisions... [ 35.032727] kmemleak: Automatic memory scanning thread ended 2023/06/20 22:15:15 testing simple program... [ 35.089810] cgroup: Unknown subsys name 'net' [ 35.127398] cgroup: Unknown subsys name 'rlimit' executing program executing program executing program VM DIAGNOSIS: 22:15:15 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=00007f636a5b10a0 CR3=000000000ca7e000 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=2035313a35313a3232203032206e754a XMM01=657463656e6e6f63736944203a5d3932 XMM02=302e303120746f6f722072657375206d XMM03=203a5d3932325b646873732072656c6c XMM04=69662068637573206f4e203a656c6163 XMM05=3a656c696620766e65206e65706f206f XMM06=65733a6468737328766e655f6d617020 XMM07=6b7a79732034313a35313a3232203032 XMM08=3d656e696c646d632022656369767265 XMM09=00000000000000000000000000000000 XMM10=00000000000000000000000000000000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000 info registers vcpu 1 RAX=dffffc0000000000 RBX=ffff88800f93fa08 RCX=1ffffffff0ba7a24 RDX=0000000000000000 RSI=ffff88800f93f9e8 RDI=ffffffff85d3d120 RBP=0000000000092cc0 RSP=ffff88800f93f958 R8 =ffff88800f93fa08 R9 =ffff88800f93f9f8 R10=0000000000000001 R11=00000000000b6a61 R12=ffff88800f93fa24 R13=0000000000000000 R14=0000000000000000 R15=0000000000000000 RIP=ffffffff81792326 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 00007fac46e06900 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=00007fac473bd618 CR3=0000000015d5c000 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=6e69676f6c5f6d61702c78756e696c65 XMM02=755f6d61702c74696d7265705f6d6170 XMM03=2c766e655f6d61702c7374696d696c5f XMM04=6d61702c766e655f6d61702c7374696d XMM05=78696e755f6d61702c74696d7265705f XMM06=6469756e69676f6c5f6d61702c78756e XMM07=672065736f6c635f6e6f69737365733a XMM08=61662029286e65706f5f746964756100 XMM09=00000000000000000000000000000000 XMM10=00000000000000000000000000000000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000