[ 37.842595] BUG: Bad rss-counter state mm:0000000064bb9a60 type:MM_FILEPAGES val:33 [ 37.844047] BUG: Bad rss-counter state mm:0000000064bb9a60 type:MM_ANONPAGES val:22 [ 37.994407] ================================================================== [ 37.995311] BUG: KASAN: slab-use-after-free in vma_interval_tree_remove+0xc75/0xec0 [ 37.996244] Read of size 8 at addr ffff88800ea65968 by task sshd/220 [ 37.997123] [ 37.997347] CPU: 0 PID: 220 Comm: sshd Not tainted 6.4.0-rc7-next-20230619 #1 [ 37.998253] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS 1.12.0-1 04/01/2014 [ 37.999255] Call Trace: [ 37.999574] <TASK> [ 37.999863] dump_stack_lvl+0x91/0xf0 [ 38.000363] print_report+0xcc/0x620 [ 38.000849] ? __virt_addr_valid+0x102/0x340 [ 38.001406] ? vma_interval_tree_remove+0xc75/0xec0 [ 38.002033] ? vma_interval_tree_remove+0xc75/0xec0 [ 38.002644] kasan_report+0xbe/0xf0 [ 38.003124] ? vma_interval_tree_remove+0xc75/0xec0 [ 38.003744] vma_interval_tree_remove+0xc75/0xec0 [ 38.004350] vma_prepare+0xc54/0x11a0 [ 38.004831] __split_vma+0x5af/0x950 [ 38.005338] ? __pfx___split_vma+0x10/0x10 [ 38.005917] ? find_held_lock+0x2c/0x110 [ 38.006453] do_vmi_align_munmap+0x2ba/0x11f0 [ 38.007043] ? lock_is_held_type+0x9f/0x120 [ 38.007593] ? __pfx_do_vmi_align_munmap+0x10/0x10 [ 38.008200] ? mtree_range_walk+0x632/0x900 [ 38.008755] ? mas_walk+0x5c7/0x7c0 [ 38.009230] do_vmi_munmap+0x1f1/0x2b0 [ 38.009731] mmap_region+0x1f9/0x2660 [ 38.010216] ? vm_mmap_pgoff+0x15c/0x3a0 [ 38.010751] ? __pfx_arch_get_unmapped_area_topdown+0x10/0x10 [ 38.011472] ? __pfx_lock_acquire+0x10/0x10 [ 38.012007] ? __pfx_mmap_region+0x10/0x10 [ 38.012540] ? security_mmap_addr+0x7d/0xa0 [ 38.013079] ? get_unmapped_area+0x1f5/0x3f0 [ 38.013631] do_mmap+0x854/0xf00 [ 38.014094] vm_mmap_pgoff+0x1a6/0x3a0 [ 38.014598] ? __pfx_vm_mmap_pgoff+0x10/0x10 [ 38.015164] ksys_mmap_pgoff+0x3af/0x500 [ 38.015674] do_syscall_64+0x3f/0x90 [ 38.016148] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 38.016793] RIP: 0033:0x7f0c30945d82 [ 38.017254] 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 [ 38.019376] RSP: 002b:00007ffd6d86c2c8 EFLAGS: 00000206 ORIG_RAX: 0000000000000009 [ 38.020277] RAX: ffffffffffffffda RBX: 0000000000000812 RCX: 00007f0c30945d82 [ 38.021124] RDX: 0000000000000005 RSI: 0000000000001000 RDI: 00007f0c2fd7f000 [ 38.021975] RBP: 00007f0c2fd7f000 R08: 0000000000000009 R09: 0000000000001000 [ 38.022816] R10: 0000000000000812 R11: 0000000000000206 R12: 0000561c52896d90 [ 38.023656] R13: 00007ffd6d86c2e0 R14: 00007ffd6d86c310 R15: 00007ffd6d86c670 [ 38.024517] </TASK> [ 38.024809] [ 38.025025] Allocated by task 212: [ 38.025452] kasan_save_stack+0x22/0x50 [ 38.025974] kasan_set_track+0x25/0x30 [ 38.026470] __kasan_slab_alloc+0x59/0x70 [ 38.026994] kmem_cache_alloc+0x16b/0x370 [ 38.027511] vm_area_dup+0x20/0x160 [ 38.027964] __split_vma+0x170/0x950 [ 38.028435] split_vma+0xc6/0x110 [ 38.028873] mprotect_fixup+0x8d2/0xb30 [ 38.029377] do_mprotect_pkey+0x87e/0xd40 [ 38.029917] __x64_sys_mprotect+0x78/0xc0 [ 38.030437] do_syscall_64+0x3f/0x90 [ 38.030910] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 38.031550] [ 38.031763] Freed by task 212: [ 38.032154] kasan_save_stack+0x22/0x50 [ 38.032658] kasan_set_track+0x25/0x30 [ 38.033153] kasan_save_free_info+0x2b/0x50 [ 38.033694] __kasan_slab_free+0x10a/0x190 [ 38.034223] kmem_cache_free+0x10d/0x4d0 [ 38.034732] rcu_core+0x8c8/0x2860 [ 38.035176] __do_softirq+0x1b7/0x7d4 [ 38.035649] [ 38.035862] Last potentially related work creation: [ 38.036445] kasan_save_stack+0x22/0x50 [ 38.036945] __kasan_record_aux_stack+0x8e/0xa0 [ 38.037519] __call_rcu_common.constprop.0+0x6a/0xb90 [ 38.038178] remove_vma+0x139/0x170 [ 38.038627] do_vmi_align_munmap+0xd4a/0x11f0 [ 38.039180] do_vmi_munmap+0x1f1/0x2b0 [ 38.039668] __vm_munmap+0x138/0x3a0 [ 38.040135] __x64_sys_munmap+0x59/0x80 [ 38.040635] do_syscall_64+0x3f/0x90 [ 38.041122] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 38.041776] [ 38.041995] Second to last potentially related work creation: [ 38.042673] kasan_save_stack+0x22/0x50 [ 38.043179] __kasan_record_aux_stack+0x8e/0xa0 [ 38.043747] __call_rcu_common.constprop.0+0x6a/0xb90 [ 38.044385] remove_vma+0x139/0x170 [ 38.044835] do_vmi_align_munmap+0xd4a/0x11f0 [ 38.045393] do_vmi_munmap+0x1f1/0x2b0 [ 38.045884] mmap_region+0x1f9/0x2660 [ 38.046363] do_mmap+0x854/0xf00 [ 38.046794] vm_mmap_pgoff+0x1a6/0x3a0 [ 38.047289] ksys_mmap_pgoff+0x3af/0x500 [ 38.047793] do_syscall_64+0x3f/0x90 [ 38.048269] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 38.048908] [ 38.049125] The buggy address belongs to the object at ffff88800ea65910 [ 38.049125] which belongs to the cache vm_area_struct of size 168 [ 38.050597] The buggy address is located 88 bytes inside of [ 38.050597] freed 168-byte region [ffff88800ea65910, ffff88800ea659b8) [ 38.051995] [ 38.052213] The buggy address belongs to the physical page: [ 38.052876] page:00000000224e1b91 refcount:1 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0xea65 [ 38.053970] memcg:ffff88800eab1901 [ 38.054400] flags: 0x100000000000200(slab|node=0|zone=1) [ 38.055045] page_type: 0xffffffff() [ 38.055496] raw: 0100000000000200 ffff88800879fc80 dead000000000100 dead000000000122 [ 38.056416] raw: 0000000000000000 0000000000110011 00000001ffffffff ffff88800eab1901 [ 38.057323] page dumped because: kasan: bad access detected [ 38.057994] [ 38.058212] Memory state around the buggy address: [ 38.058788] ffff88800ea65800: fc fc fc fc fc fa fb fb fb fb fb fb fb fb fb fb [ 38.059652] ffff88800ea65880: fb fb fb fb fb fb fb fb fb fb fc fc fc fc fc fc [ 38.060511] >ffff88800ea65900: fc fc fa fb fb fb fb fb fb fb fb fb fb fb fb fb [ 38.061355] ^ [ 38.062146] ffff88800ea65980: fb fb fb fb fb fb fb fc fc fc fc fc fc fc fc 00 [ 38.063000] ffff88800ea65a00: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 [ 38.063843] ================================================================== [ 38.064819] Disabling lock debugging due to kernel taint Debian GNU/Linux 11 syzkaller ttyS0 syzkaller login: [ 39.646469] BUG: Bad rss-counter state mm:000000002c03098a type:MM_FILEPAGES val:33 [ 39.647470] BUG: Bad rss-counter state mm:000000002c03098a type:MM_ANONPAGES val:22 [ 40.012268] BUG: Bad rss-counter state mm:00000000c6d993bb type:MM_FILEPAGES val:33 [ 40.013370] BUG: Bad rss-counter state mm:00000000c6d993bb type:MM_ANONPAGES val:22 Warning: Permanently added '[localhost]:30279' (ECDSA) to the list of known hosts. 2023/06/19 15:30:08 fuzzer started 2023/06/19 15:30:08 dialing manager at localhost:44161 2023/06/19 15:30:08 checking machine... 2023/06/19 15:30:08 checking revisions... [ 40.666883] kmemleak: Automatic memory scanning thread ended 2023/06/19 15:30:08 testing simple program... [ 40.711347] cgroup: Unknown subsys name 'net' [ 40.742546] cgroup: Unknown subsys name 'rlimit' executing program executing program executing program VM DIAGNOSIS: 15:29:54 Registers: info registers vcpu 0 RAX=0000000000000001 RBX=000000000000009f RCX=ffffffff8186b960 RDX=ffffed10019dede1 RSI=0000000000000004 RDI=ffff88800cef6f00 RBP=ffff88800e3afb80 RSP=ffff88806ce09e48 R8 =0000000000000001 R9 =ffffed10019dede0 R10=ffff88800cef6f03 R11=0000000000000000 R12=ffff88800cef6f00 R13=ffff88806ce09ee8 R14=ffff88806ce35000 R15=ffff88800e3afb80 RIP=ffffffff8186b965 RFL=00000202 [-------] 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 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=00007fcd7a5d2aa0 CR3=000000000c3ec000 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=f8fab35fff4b6a9597470b67021fa86a XMM02=000000000011fb28ec2efd57dc4c00df XMM03=00000000001237d0fd7655145a799d6c XMM04=b861c7cc25c6709800000000000ae988 XMM05=19e9129bd510f2350000000000134360 XMM06=96b68fd64d5168da0000000000132dd0 XMM07=e042d86d42eb936e0000000000123aa8 XMM08=fd7655145a799d6c000000000011fb88 XMM09=00000000000000000000000000000000 XMM10=00000000000000000000000000000000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000 info registers vcpu 1 RAX=0000000080000000 RBX=0000000000000003 RCX=ffffffff8186d210 RDX=ffff88800efcd1c0 RSI=0000000000000000 RDI=0000000000000005 RBP=ffff888016b6fd88 RSP=ffff888016b6fd40 R8 =0000000000000005 R9 =0000000000000001 R10=0000000000000003 R11=00000000000b6996 R12=ffff88800e11f400 R13=ffff888016b6fde0 R14=ffffffff84d2fa00 R15=00000000000e0003 RIP=ffffffff814c07eb RFL=00000202 [-------] 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 00007f935c188900 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=00007fffb7ce7000 CR3=000000000f176000 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