[ 23.890420] BUG: Bad rss-counter state mm:00000000963f9701 type:MM_FILEPAGES val:33 [ 23.891646] BUG: Bad rss-counter state mm:00000000963f9701 type:MM_ANONPAGES val:22 [ 24.035776] ================================================================== [ 24.036882] BUG: KASAN: slab-use-after-free in vma_interval_tree_remove+0xc75/0xec0 [ 24.037942] Read of size 8 at addr ffff88800dd21c20 by task sshd/219 [ 24.038914] [ 24.039134] CPU: 1 PID: 219 Comm: sshd Not tainted 6.4.0-rc7-next-20230620 #1 [ 24.040016] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS 1.12.0-1 04/01/2014 [ 24.041053] Call Trace: [ 24.041393] [ 24.041683] dump_stack_lvl+0x91/0xf0 [ 24.042184] print_report+0xcc/0x620 [ 24.042680] ? __virt_addr_valid+0x102/0x340 [ 24.043249] ? vma_interval_tree_remove+0xc75/0xec0 [ 24.043871] ? vma_interval_tree_remove+0xc75/0xec0 [ 24.044493] kasan_report+0xbe/0xf0 [ 24.044972] ? vma_interval_tree_remove+0xc75/0xec0 [ 24.045600] vma_interval_tree_remove+0xc75/0xec0 [ 24.046202] vma_prepare+0xc54/0x11a0 [ 24.046689] __split_vma+0x5af/0x950 [ 24.047161] ? __pfx___split_vma+0x10/0x10 [ 24.047686] ? find_held_lock+0x2c/0x110 [ 24.048211] do_vmi_align_munmap+0x2ba/0x11f0 [ 24.048783] ? lock_is_held_type+0x9f/0x120 [ 24.049344] ? __pfx_do_vmi_align_munmap+0x10/0x10 [ 24.049951] ? mtree_range_walk+0x632/0x900 [ 24.050504] ? mas_walk+0x5c7/0x7c0 [ 24.050982] do_vmi_munmap+0x1f1/0x2b0 [ 24.051474] mmap_region+0x1f9/0x2660 [ 24.051954] ? vm_mmap_pgoff+0x15c/0x3a0 [ 24.052464] ? __pfx_arch_get_unmapped_area_topdown+0x10/0x10 [ 24.053191] ? __pfx_lock_acquire+0x10/0x10 [ 24.053736] ? __pfx_mmap_region+0x10/0x10 [ 24.054264] ? security_mmap_addr+0x7d/0xa0 [ 24.054803] ? get_unmapped_area+0x1f5/0x3f0 [ 24.055352] do_mmap+0x854/0xf00 [ 24.055797] vm_mmap_pgoff+0x1a6/0x3a0 [ 24.056306] ? __pfx_vm_mmap_pgoff+0x10/0x10 [ 24.056887] ksys_mmap_pgoff+0x3af/0x500 [ 24.057411] do_syscall_64+0x3f/0x90 [ 24.057890] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 24.058532] RIP: 0033:0x7f25d7394d82 [ 24.058997] 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 [ 24.061135] RSP: 002b:00007ffcec317ce8 EFLAGS: 00000206 ORIG_RAX: 0000000000000009 [ 24.062066] RAX: ffffffffffffffda RBX: 0000000000000812 RCX: 00007f25d7394d82 [ 24.062909] RDX: 0000000000000005 RSI: 0000000000001000 RDI: 00007f25d67ce000 [ 24.063755] RBP: 00007f25d67ce000 R08: 0000000000000009 R09: 0000000000001000 [ 24.064603] R10: 0000000000000812 R11: 0000000000000206 R12: 0000564d8d755ec0 [ 24.065455] R13: 00007ffcec317d00 R14: 00007ffcec317d30 R15: 00007ffcec318090 [ 24.066309] [ 24.066600] [ 24.066819] Allocated by task 212: [ 24.067245] kasan_save_stack+0x22/0x50 [ 24.067752] kasan_set_track+0x25/0x30 [ 24.068246] __kasan_slab_alloc+0x59/0x70 [ 24.068765] kmem_cache_alloc+0x16b/0x370 [ 24.069309] vm_area_dup+0x20/0x160 [ 24.069773] __split_vma+0x170/0x950 [ 24.070237] split_vma+0xc6/0x110 [ 24.070688] mprotect_fixup+0x8d2/0xb30 [ 24.071192] do_mprotect_pkey+0x87e/0xd40 [ 24.071718] __x64_sys_mprotect+0x78/0xc0 [ 24.072245] do_syscall_64+0x3f/0x90 [ 24.072731] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 24.073381] [ 24.073596] Freed by task 212: [ 24.073986] kasan_save_stack+0x22/0x50 [ 24.074492] kasan_set_track+0x25/0x30 [ 24.074990] kasan_save_free_info+0x2b/0x50 [ 24.075523] __kasan_slab_free+0x10a/0x190 [ 24.076062] kmem_cache_free+0x10d/0x4d0 [ 24.076568] rcu_core+0x8c8/0x2860 [ 24.077010] __do_softirq+0x1b7/0x7d4 [ 24.077504] [ 24.077719] Last potentially related work creation: [ 24.078311] kasan_save_stack+0x22/0x50 [ 24.078813] __kasan_record_aux_stack+0x8e/0xa0 [ 24.079446] __call_rcu_common.constprop.0+0x6a/0xb90 [ 24.080093] remove_vma+0x139/0x170 [ 24.080545] do_vmi_align_munmap+0xd4a/0x11f0 [ 24.081113] do_vmi_munmap+0x1f1/0x2b0 [ 24.081606] __vm_munmap+0x138/0x3a0 [ 24.082082] __x64_sys_munmap+0x59/0x80 [ 24.082580] do_syscall_64+0x3f/0x90 [ 24.083066] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 24.083710] [ 24.083927] The buggy address belongs to the object at ffff88800dd21bc8 [ 24.083927] which belongs to the cache vm_area_struct of size 168 [ 24.085418] The buggy address is located 88 bytes inside of [ 24.085418] freed 168-byte region [ffff88800dd21bc8, ffff88800dd21c70) [ 24.086855] [ 24.087075] The buggy address belongs to the physical page: [ 24.087746] page:00000000ca162c50 refcount:1 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0xdd21 [ 24.088834] memcg:ffff88800cecd301 [ 24.089276] flags: 0x100000000000200(slab|node=0|zone=1) [ 24.089926] page_type: 0xffffffff() [ 24.090384] raw: 0100000000000200 ffff8880087a0c80 ffffea0000359d40 dead000000000008 [ 24.091309] raw: 0000000000000000 0000000000110011 00000001ffffffff ffff88800cecd301 [ 24.092221] page dumped because: kasan: bad access detected [ 24.092880] [ 24.093105] Memory state around the buggy address: [ 24.093685] ffff88800dd21b00: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 [ 24.094549] ffff88800dd21b80: 00 fc fc fc fc fc fc fc fc fa fb fb fb fb fb fb [ 24.095406] >ffff88800dd21c00: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fc fc [ 24.096257] ^ [ 24.096790] ffff88800dd21c80: fc fc fc fc fc fc fa fb fb fb fb fb fb fb fb fb [ 24.097657] ffff88800dd21d00: fb fb fb fb fb fb fb fb fb fb fb fc fc fc fc fc [ 24.098516] ================================================================== [ 24.099442] Disabling lock debugging due to kernel taint Debian GNU/Linux 11 syzkaller ttyS0 syzkaller login: [ 26.579674] BUG: Bad rss-counter state mm:00000000ca034405 type:MM_FILEPAGES val:33 [ 26.580783] BUG: Bad rss-counter state mm:00000000ca034405 type:MM_ANONPAGES val:22 [ 27.076993] BUG: Bad rss-counter state mm:00000000a9625a24 type:MM_FILEPAGES val:33 [ 27.078078] BUG: Bad rss-counter state mm:00000000a9625a24 type:MM_ANONPAGES val:22 Warning: Permanently added '[localhost]:55072' (ECDSA) to the list of known hosts. 2023/06/21 06:22:33 fuzzer started 2023/06/21 06:22:33 dialing manager at localhost:36067 2023/06/21 06:22:33 checking machine... 2023/06/21 06:22:33 checking revisions... [ 27.787477] kmemleak: Automatic memory scanning thread ended 2023/06/21 06:22:33 testing simple program... [ 27.845427] cgroup: Unknown subsys name 'net' [ 27.925729] cgroup: Unknown subsys name 'rlimit' executing program executing program executing program VM DIAGNOSIS: 06:22:33 Registers: info registers vcpu 0 RAX=ffff88806ce36180 RBX=ffff88801a25eac8 RCX=ffff888019ee4000 RDX=00000000000000b8 RSI=0000000000000008 RDI=ffffffff85d3d350 RBP=ffff8880087b2500 RSP=ffff88806ce09e00 R8 =0000000000000000 R9 =fffffbfff0ba7a6a R10=ffffffff85d3d357 R11=00000000000b6a61 R12=0000000000000200 R13=ffffea0000689780 R14=ffffffff813782f8 R15=ffff88801a25eac8 RIP=ffffffff818106e2 RFL=00000086 [--S--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 00007f9619e56900 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=00007ffd52b0d000 CR3=000000000c64c000 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=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 info registers vcpu 1 RAX=ffff88806cf35000 RBX=0000000000000001 RCX=ffffffff8451250e RDX=ffffed100d9e6a01 RSI=0000000000000004 RDI=ffffffff81288ac5 RBP=dffffc0000000000 RSP=ffff888008e07e70 R8 =0000000000000000 R9 =ffffed100d9e6a00 R10=ffff88806cf35003 R11=0000000000000001 R12=ffffffff85d3d350 R13=1ffff110011c0fd3 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 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=00007f1d8cf55670 CR3=00000000147cc000 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=2033333a32323a3630203132206e754a XMM01=73732878696e755f6d6170203a5d3832 XMM02=65736f6c63206e6f6973736573203a29 XMM03=755f6d6170203a5d3832325b64687373 XMM04=69662068637573206f4e203a656c6163 XMM05=3a656c696620766e65206e65706f206f XMM06=65733a6468737328766e655f6d617020 XMM07=6b7a79732032333a32323a3630203132 XMM08=69767265733d7373616c63742030733a XMM09=00000000000000000000000000000000 XMM10=00000000000000000000000000000000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000