[ 30.843831] BUG: Bad rss-counter state mm:000000004fab576f type:MM_FILEPAGES val:33 [ 30.844971] BUG: Bad rss-counter state mm:000000004fab576f type:MM_ANONPAGES val:22 [ 31.000543] ================================================================== [ 31.001671] BUG: KASAN: slab-use-after-free in vma_interval_tree_remove+0xc75/0xec0 [ 31.002946] Read of size 8 at addr ffff88801463b5c8 by task sshd/221 [ 31.003905] [ 31.004129] CPU: 1 PID: 221 Comm: sshd Not tainted 6.4.0-rc7-next-20230620 #1 [ 31.005046] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS 1.12.0-1 04/01/2014 [ 31.006079] Call Trace: [ 31.006413] [ 31.006720] dump_stack_lvl+0x91/0xf0 [ 31.007231] print_report+0xcc/0x620 [ 31.007738] ? __virt_addr_valid+0x102/0x340 [ 31.008325] ? vma_interval_tree_remove+0xc75/0xec0 [ 31.008983] ? vma_interval_tree_remove+0xc75/0xec0 [ 31.009647] kasan_report+0xbe/0xf0 [ 31.010138] ? vma_interval_tree_remove+0xc75/0xec0 [ 31.010789] vma_interval_tree_remove+0xc75/0xec0 [ 31.011393] vma_prepare+0xc54/0x11a0 [ 31.011878] __split_vma+0x5af/0x950 [ 31.012349] ? __pfx___split_vma+0x10/0x10 [ 31.012892] ? find_held_lock+0x2c/0x110 [ 31.013423] do_vmi_align_munmap+0x2ba/0x11f0 [ 31.013971] ? lock_is_held_type+0x9f/0x120 [ 31.014489] ? __pfx_do_vmi_align_munmap+0x10/0x10 [ 31.015062] ? mtree_range_walk+0x632/0x900 [ 31.015593] ? mas_walk+0x5c7/0x7c0 [ 31.016057] do_vmi_munmap+0x1f1/0x2b0 [ 31.016529] mmap_region+0x1f9/0x2660 [ 31.017021] ? vm_mmap_pgoff+0x15c/0x3a0 [ 31.017558] ? __pfx_arch_get_unmapped_area_topdown+0x10/0x10 [ 31.018309] ? __pfx_lock_acquire+0x10/0x10 [ 31.018851] ? __pfx_mmap_region+0x10/0x10 [ 31.019374] ? security_mmap_addr+0x7d/0xa0 [ 31.019931] ? get_unmapped_area+0x1f5/0x3f0 [ 31.020485] do_mmap+0x854/0xf00 [ 31.020933] vm_mmap_pgoff+0x1a6/0x3a0 [ 31.021443] ? __pfx_vm_mmap_pgoff+0x10/0x10 [ 31.022017] ksys_mmap_pgoff+0x3af/0x500 [ 31.022548] do_syscall_64+0x3f/0x90 [ 31.023025] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 31.023667] RIP: 0033:0x7f5a444b0d82 [ 31.024125] 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 [ 31.026237] RSP: 002b:00007ffe59603358 EFLAGS: 00000206 ORIG_RAX: 0000000000000009 [ 31.027155] RAX: ffffffffffffffda RBX: 0000000000000812 RCX: 00007f5a444b0d82 [ 31.028028] RDX: 0000000000000005 RSI: 0000000000001000 RDI: 00007f5a438ea000 [ 31.028896] RBP: 00007f5a438ea000 R08: 0000000000000009 R09: 0000000000001000 [ 31.029778] R10: 0000000000000812 R11: 0000000000000206 R12: 0000561dfc6c2ec0 [ 31.030661] R13: 00007ffe59603370 R14: 00007ffe596033a0 R15: 00007ffe59603700 [ 31.031501] [ 31.031804] [ 31.032015] Allocated by task 214: [ 31.032432] kasan_save_stack+0x22/0x50 [ 31.032928] kasan_set_track+0x25/0x30 [ 31.033429] __kasan_slab_alloc+0x59/0x70 [ 31.033958] kmem_cache_alloc+0x16b/0x370 [ 31.034484] vm_area_dup+0x20/0x160 [ 31.034942] __split_vma+0x170/0x950 [ 31.035417] split_vma+0xc6/0x110 [ 31.035874] mprotect_fixup+0x8d2/0xb30 [ 31.036386] do_mprotect_pkey+0x87e/0xd40 [ 31.036918] __x64_sys_mprotect+0x78/0xc0 [ 31.037449] do_syscall_64+0x3f/0x90 [ 31.037937] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 31.038584] [ 31.038798] Freed by task 110: [ 31.039186] kasan_save_stack+0x22/0x50 [ 31.039692] kasan_set_track+0x25/0x30 [ 31.040218] kasan_save_free_info+0x2b/0x50 [ 31.040751] __kasan_slab_free+0x10a/0x190 [ 31.041267] kmem_cache_free+0x10d/0x4d0 [ 31.041784] rcu_core+0x8c8/0x2860 [ 31.042226] __do_softirq+0x1b7/0x7d4 [ 31.042719] [ 31.042940] Last potentially related work creation: [ 31.043540] kasan_save_stack+0x22/0x50 [ 31.044123] __kasan_record_aux_stack+0x8e/0xa0 [ 31.044715] __call_rcu_common.constprop.0+0x6a/0xb90 [ 31.045373] remove_vma+0x139/0x170 [ 31.045829] do_vmi_align_munmap+0xd4a/0x11f0 [ 31.046393] do_vmi_munmap+0x1f1/0x2b0 [ 31.046885] __vm_munmap+0x138/0x3a0 [ 31.047370] __x64_sys_munmap+0x59/0x80 [ 31.047885] do_syscall_64+0x3f/0x90 [ 31.048375] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 31.049033] [ 31.049251] The buggy address belongs to the object at ffff88801463b570 [ 31.049251] which belongs to the cache vm_area_struct of size 168 [ 31.050752] The buggy address is located 88 bytes inside of [ 31.050752] freed 168-byte region [ffff88801463b570, ffff88801463b618) [ 31.052202] [ 31.052424] The buggy address belongs to the physical page: [ 31.053098] page:000000000b8e6545 refcount:1 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0x1463b [ 31.054205] memcg:ffff888017c35501 [ 31.054646] anon flags: 0x100000000000200(slab|node=0|zone=1) [ 31.055361] page_type: 0xffffffff() [ 31.055822] raw: 0100000000000200 ffff8880087a0c80 ffffea00002cd380 dead000000000005 [ 31.056752] raw: 0000000000000000 0000000000110011 00000001ffffffff ffff888017c35501 [ 31.057676] page dumped because: kasan: bad access detected [ 31.058350] [ 31.058566] Memory state around the buggy address: [ 31.059163] ffff88801463b480: fc fa fb fb fb fb fb fb fb fb fb fb fb fb fb fb [ 31.060048] ffff88801463b500: fb fb fb fb fb fb fc fc fc fc fc fc fc fc fa fb [ 31.060915] >ffff88801463b580: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb [ 31.061781] ^ [ 31.062459] ffff88801463b600: fb fb fb fc fc fc fc fc fc fc fc fa fb fb fb fb [ 31.063331] ffff88801463b680: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb [ 31.064212] ================================================================== [ 31.065165] Disabling lock debugging due to kernel taint Debian GNU/Linux 11 syzkaller ttyS0 syzkaller login: [ 32.826471] BUG: Bad rss-counter state mm:0000000001df614f type:MM_FILEPAGES val:33 [ 32.827239] BUG: Bad rss-counter state mm:0000000001df614f type:MM_ANONPAGES val:22 [ 33.345106] BUG: Bad rss-counter state mm:00000000250faf81 type:MM_FILEPAGES val:33 [ 33.346125] BUG: Bad rss-counter state mm:00000000250faf81 type:MM_ANONPAGES val:22 Warning: Permanently added '[localhost]:41461' (ECDSA) to the list of known hosts. 2023/06/20 10:54:27 fuzzer started 2023/06/20 10:54:27 dialing manager at localhost:36067 2023/06/20 10:54:27 checking machine... 2023/06/20 10:54:27 checking revisions... [ 34.008018] kmemleak: Automatic memory scanning thread ended 2023/06/20 10:54:27 testing simple program... [ 34.056614] cgroup: Unknown subsys name 'net' [ 34.115559] cgroup: Unknown subsys name 'rlimit' executing program executing program executing program VM DIAGNOSIS: 10:54:26 Registers: info registers vcpu 0 RAX=dffffc0000000000 RBX=0000000000000000 RCX=ffffffff812e0473 RDX=0000000000000000 RSI=ffffffff83c1d071 RDI=ffff88800fe90e68 RBP=ffff88800fe90e50 RSP=ffff888019c6fd58 R8 =0000000000000000 R9 =ffffed1001fd29ca R10=ffff88800fe94e53 R11=0000000000000001 R12=ffff88800fe94800 R13=0000000000000000 R14=ffff88800fe94812 R15=ffff88800fe94e50 RIP=ffffffff812d865e RFL=00000282 [--S----] 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 00007f93e6cde900 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=00007f93e7293650 CR3=000000000eb36000 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=000000000000000000000000000000ff XMM02=000000000000000000000000000000ff XMM03=5320444f4854454d5f54505952434e45 XMM04=40404040404040404040404040404040 XMM05=5a5a5a5a5a5a5a5a5a5a5a5a5a5a5a5a XMM06=20202020202020202020202020202020 XMM07=00000000000000000000000000000000 XMM08=ffbc64ffffbc44ffffbc34ffffbc9f00 XMM09=00000000000000000000000000000000 XMM10=00000000000000000000000000000000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000 info registers vcpu 1 RAX=dffffc0000000000 RBX=ffff88806cf09b60 RCX=ffffffff86138e01 RDX=1ffff1100d9e137c RSI=ffffffff8180f5bb RDI=ffff88806cf09b6c RBP=ffff88806cf09be0 RSP=ffff88806cf09a78 R8 =ffffffff86138eb4 R9 =ffff88806cf09ad8 R10=0000000000038001 R11=0000000000020d9c R12=ffff88806cf09b60 R13=0000000000000000 R14=ffff888008d951c0 R15=ffff88800df49d90 RIP=ffffffff813ad543 RFL=00000212 [----A--] 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 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=00007fff6d15ee88 CR3=000000001476e000 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=2036323a34353a3031203032206e754a XMM01=73732878696e755f6d6170203a5d3233 XMM02=65736f6c63206e6f6973736573203a29 XMM03=755f6d6170203a5d3233325b64687373 XMM04=69662068637573206f4e203a656c6163 XMM05=3a656c696620766e65206e65706f206f XMM06=65733a6468737328766e655f6d617020 XMM07=6b7a79732036323a34353a3031203032 XMM08=3d656e696c646d632022656369767265 XMM09=00000000000000000000000000000000 XMM10=00000000000000000000000000000000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000