[ 24.216263] BUG: Bad rss-counter state mm:00000000725a0577 type:MM_FILEPAGES val:33 [ 24.216283] BUG: Bad rss-counter state mm:00000000725a0577 type:MM_ANONPAGES val:22 [ 24.409481] ================================================================== [ 24.410511] BUG: KASAN: slab-use-after-free in vma_interval_tree_remove+0xc75/0xec0 [ 24.411548] Read of size 8 at addr ffff888018f644e0 by task sshd/219 [ 24.412572] [ 24.412813] CPU: 1 PID: 219 Comm: sshd Not tainted 6.4.0-rc7-next-20230619 #1 [ 24.413784] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS 1.12.0-1 04/01/2014 [ 24.414871] Call Trace: [ 24.415222] [ 24.415533] dump_stack_lvl+0x91/0xf0 [ 24.416073] print_report+0xcc/0x620 [ 24.416600] ? __virt_addr_valid+0x102/0x340 [ 24.417217] ? vma_interval_tree_remove+0xc75/0xec0 [ 24.417896] ? vma_interval_tree_remove+0xc75/0xec0 [ 24.418571] kasan_report+0xbe/0xf0 [ 24.419091] ? vma_interval_tree_remove+0xc75/0xec0 [ 24.419773] vma_interval_tree_remove+0xc75/0xec0 [ 24.420431] vma_prepare+0xc54/0x11a0 [ 24.420971] __split_vma+0x5af/0x950 [ 24.421493] ? __pfx___split_vma+0x10/0x10 [ 24.422080] ? find_held_lock+0x2c/0x110 [ 24.422652] do_vmi_align_munmap+0x2ba/0x11f0 [ 24.423272] ? lock_is_held_type+0x9f/0x120 [ 24.423864] ? __pfx_do_vmi_align_munmap+0x10/0x10 [ 24.424532] ? mtree_range_walk+0x632/0x900 [ 24.425157] ? mas_walk+0x5c7/0x7c0 [ 24.425684] do_vmi_munmap+0x1f1/0x2b0 [ 24.426226] mmap_region+0x1f9/0x2660 [ 24.426756] ? vm_mmap_pgoff+0x15c/0x3a0 [ 24.427318] ? __pfx_arch_get_unmapped_area_topdown+0x10/0x10 [ 24.428103] ? __pfx_lock_acquire+0x10/0x10 [ 24.428688] ? __pfx_mmap_region+0x10/0x10 [ 24.429276] ? security_mmap_addr+0x7d/0xa0 [ 24.429862] ? get_unmapped_area+0x1f5/0x3f0 [ 24.430468] do_mmap+0x854/0xf00 [ 24.430948] vm_mmap_pgoff+0x1a6/0x3a0 [ 24.431483] ? __pfx_vm_mmap_pgoff+0x10/0x10 [ 24.432086] ksys_mmap_pgoff+0x3af/0x500 [ 24.432633] do_syscall_64+0x3f/0x90 [ 24.433154] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 24.433840] RIP: 0033:0x7f5e3d6bdd82 [ 24.434336] 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 [ 24.436604] RSP: 002b:00007ffe775aff08 EFLAGS: 00000206 ORIG_RAX: 0000000000000009 [ 24.437588] RAX: ffffffffffffffda RBX: 0000000000000812 RCX: 00007f5e3d6bdd82 [ 24.438483] RDX: 0000000000000005 RSI: 0000000000001000 RDI: 00007f5e3caf7000 [ 24.439385] RBP: 00007f5e3caf7000 R08: 0000000000000009 R09: 0000000000001000 [ 24.440285] R10: 0000000000000812 R11: 0000000000000206 R12: 00005606f9e95f70 [ 24.441200] R13: 00007ffe775aff20 R14: 00007ffe775aff50 R15: 00007ffe775b02b0 [ 24.442106] [ 24.442419] [ 24.442647] Allocated by task 211: [ 24.443107] kasan_save_stack+0x22/0x50 [ 24.443645] kasan_set_track+0x25/0x30 [ 24.444172] __kasan_slab_alloc+0x59/0x70 [ 24.444729] kmem_cache_alloc+0x16b/0x370 [ 24.445293] vm_area_dup+0x20/0x160 [ 24.445783] __split_vma+0x170/0x950 [ 24.446286] split_vma+0xc6/0x110 [ 24.446760] mprotect_fixup+0x8d2/0xb30 [ 24.447303] do_mprotect_pkey+0x87e/0xd40 [ 24.447864] __x64_sys_mprotect+0x78/0xc0 [ 24.448423] do_syscall_64+0x3f/0x90 [ 24.448940] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 24.449629] [ 24.449857] Freed by task 13: [ 24.450268] kasan_save_stack+0x22/0x50 [ 24.450808] kasan_set_track+0x25/0x30 [ 24.451334] kasan_save_free_info+0x2b/0x50 [ 24.451906] __kasan_slab_free+0x10a/0x190 [ 24.452474] kmem_cache_free+0x10d/0x4d0 [ 24.453037] rcu_core+0x8c8/0x2860 [ 24.453510] __do_softirq+0x1b7/0x7d4 [ 24.454080] [ 24.454311] Last potentially related work creation: [ 24.454933] kasan_save_stack+0x22/0x50 [ 24.455476] __kasan_record_aux_stack+0x8e/0xa0 [ 24.456099] __call_rcu_common.constprop.0+0x6a/0xb90 [ 24.456787] remove_vma+0x139/0x170 [ 24.457284] do_vmi_align_munmap+0xd4a/0x11f0 [ 24.457889] do_vmi_munmap+0x1f1/0x2b0 [ 24.458412] __vm_munmap+0x138/0x3a0 [ 24.458912] __x64_sys_munmap+0x59/0x80 [ 24.459443] do_syscall_64+0x3f/0x90 [ 24.459950] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 24.460630] [ 24.460857] The buggy address belongs to the object at ffff888018f64488 [ 24.460857] which belongs to the cache vm_area_struct of size 168 [ 24.462460] The buggy address is located 88 bytes inside of [ 24.462460] freed 168-byte region [ffff888018f64488, ffff888018f64530) [ 24.463969] [ 24.464201] The buggy address belongs to the physical page: [ 24.464918] page:00000000dfcc5416 refcount:1 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0x18f64 [ 24.466122] memcg:ffff88801a957901 [ 24.466580] flags: 0x100000000000200(slab|node=0|zone=1) [ 24.467279] page_type: 0xffffffff() [ 24.467760] raw: 0100000000000200 ffff88800879fc80 dead000000000122 0000000000000000 [ 24.468734] raw: 0000000000000000 0000000000110011 00000001ffffffff ffff88801a957901 [ 24.469707] page dumped because: kasan: bad access detected [ 24.470411] [ 24.470645] Memory state around the buggy address: [ 24.471276] ffff888018f64380: fc fc fc fc 00 00 00 00 00 00 00 00 00 00 00 00 [ 24.472192] ffff888018f64400: 00 00 00 00 00 00 00 00 00 fc fc fc fc fc fc fc [ 24.473115] >ffff888018f64480: fc fa fb fb fb fb fb fb fb fb fb fb fb fb fb fb [ 24.474033] ^ [ 24.474842] ffff888018f64500: fb fb fb fb fb fb fc fc fc fc fc fc fc fc fa fb [ 24.475757] ffff888018f64580: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb [ 24.476667] ================================================================== [ 24.477828] Disabling lock debugging due to kernel taint Debian GNU/Linux 11 syzkaller ttyS0 syzkaller login: [ 27.011684] BUG: Bad rss-counter state mm:00000000f45f762f type:MM_FILEPAGES val:33 [ 27.012713] BUG: Bad rss-counter state mm:00000000f45f762f type:MM_ANONPAGES val:22 [ 27.485651] BUG: Bad rss-counter state mm:000000008ec20ab6 type:MM_FILEPAGES val:33 [ 27.486704] BUG: Bad rss-counter state mm:000000008ec20ab6 type:MM_ANONPAGES val:22 Warning: Permanently added '[localhost]:41499' (ECDSA) to the list of known hosts. 2023/06/19 21:03:03 fuzzer started 2023/06/19 21:03:04 dialing manager at localhost:44161 2023/06/19 21:03:04 checking machine... 2023/06/19 21:03:04 checking revisions... [ 28.207435] kmemleak: Automatic memory scanning thread ended 2023/06/19 21:03:04 testing simple program... [ 28.255772] cgroup: Unknown subsys name 'net' [ 28.297602] cgroup: Unknown subsys name 'rlimit' executing program executing program executing program VM DIAGNOSIS: 21:03:03 Registers: info registers vcpu 0 RAX=ffffffff860d68fb RBX=0000000000000001 RCX=ffffffff860d68f6 RDX=0000000000000000 RSI=0000000000000000 RDI=0000000000000001 RBP=ffff8880094f7a08 RSP=ffff8880094f7940 R8 =ffffffff860d68fa R9 =ffff8880094f79f0 R10=0000000000038001 R11=0000000000010b7e R12=ffff8880094f7a10 R13=ffff8880094f79f8 R14=ffff8880094f7ae8 R15=ffff8880094f79b0 RIP=ffffffff8113113c 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 =0000 0000000000000000 00000000 00000000 DS =0000 0000000000000000 00000000 00000000 FS =0000 00007f4a6bfff700 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=00007f86bc1722c0 CR3=000000000c4f4000 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=2033303a33303a3132203931206e754a XMM01=657463656e6e6f63736944203a5d3832 XMM02=302e303120746f6f722072657375206d XMM03=203a5d3832325b646873732072656c6c XMM04=69662068637573206f4e203a656c6163 XMM05=3a656c696620766e65206e65706f206f XMM06=65733a6468737328766e655f6d617020 XMM07=6b7a79732033303a33303a3132203931 XMM08=3d656e696c646d632022656369767265 XMM09=00000000000000000000000000000000 XMM10=00000000000000000000000000000000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000 info registers vcpu 1 RAX=ffff88806cf35000 RBX=0000000000000001 RCX=ffffffff8450c50e RDX=ffffed100d9e6a01 RSI=0000000000000004 RDI=ffffffff812889a5 RBP=dffffc0000000000 RSP=ffff888008e27e70 R8 =0000000000000000 R9 =ffffed100d9e6a00 R10=ffff88806cf35003 R11=0000000000000001 R12=ffffffff85d3bed0 R13=1ffff110011c4fd3 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 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=00007fff1b6a1a98 CR3=0000000005482000 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=00007f74e7458510000056119b2d6790 XMM02=6f6974707972636e6561737268746977 XMM03=00000000000000000000000000777074 XMM04=40404040404040404040404040404040 XMM05=5a5a5a5a5a5a5a5a5a5a5a5a5a5a5a5a XMM06=20202020202020202020202020202020 XMM07=ffffffffffff00ffffff00ffffff00ff XMM08=00002000000000202020002020200000 XMM09=ffffffffffff00ffffff00ffffff00ff XMM10=00002000000000202020002020200000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000