[ 31.459599] BUG: Bad rss-counter state mm:00000000a2b950ca type:MM_FILEPAGES val:33 [ 31.460629] BUG: Bad rss-counter state mm:00000000a2b950ca type:MM_ANONPAGES val:22 [ 31.625885] ================================================================== [ 31.626782] BUG: KASAN: slab-use-after-free in vma_interval_tree_remove+0xc75/0xec0 [ 31.627718] Read of size 8 at addr ffff88801678f4e0 by task sshd/220 [ 31.628492] [ 31.628842] CPU: 0 PID: 220 Comm: sshd Not tainted 6.4.0-rc7-next-20230620 #1 [ 31.629690] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS 1.12.0-1 04/01/2014 [ 31.630651] Call Trace: [ 31.630996] [ 31.631282] dump_stack_lvl+0x91/0xf0 [ 31.631774] print_report+0xcc/0x620 [ 31.632252] ? __virt_addr_valid+0x102/0x340 [ 31.632798] ? vma_interval_tree_remove+0xc75/0xec0 [ 31.633419] ? vma_interval_tree_remove+0xc75/0xec0 [ 31.634028] kasan_report+0xbe/0xf0 [ 31.634496] ? vma_interval_tree_remove+0xc75/0xec0 [ 31.635107] vma_interval_tree_remove+0xc75/0xec0 [ 31.635708] vma_prepare+0xc54/0x11a0 [ 31.636182] __split_vma+0x5af/0x950 [ 31.636646] ? __pfx___split_vma+0x10/0x10 [ 31.637185] ? find_held_lock+0x2c/0x110 [ 31.637699] do_vmi_align_munmap+0x2ba/0x11f0 [ 31.638253] ? lock_is_held_type+0x9f/0x120 [ 31.638787] ? __pfx_do_vmi_align_munmap+0x10/0x10 [ 31.639386] ? mtree_range_walk+0x632/0x900 [ 31.639931] ? mas_walk+0x5c7/0x7c0 [ 31.640397] do_vmi_munmap+0x1f1/0x2b0 [ 31.640911] mmap_region+0x1f9/0x2660 [ 31.641391] ? vm_mmap_pgoff+0x15c/0x3a0 [ 31.641896] ? __pfx_arch_get_unmapped_area_topdown+0x10/0x10 [ 31.642595] ? __pfx_lock_acquire+0x10/0x10 [ 31.643120] ? __pfx_mmap_region+0x10/0x10 [ 31.643642] ? security_mmap_addr+0x7d/0xa0 [ 31.644169] ? get_unmapped_area+0x1f5/0x3f0 [ 31.644712] do_mmap+0x854/0xf00 [ 31.645154] vm_mmap_pgoff+0x1a6/0x3a0 [ 31.645648] ? __pfx_vm_mmap_pgoff+0x10/0x10 [ 31.646202] ksys_mmap_pgoff+0x3af/0x500 [ 31.646704] do_syscall_64+0x3f/0x90 [ 31.647180] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 31.647818] RIP: 0033:0x7f598be2dd82 [ 31.648268] 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 [ 31.650377] RSP: 002b:00007ffd20cbfd98 EFLAGS: 00000206 ORIG_RAX: 0000000000000009 [ 31.651269] RAX: ffffffffffffffda RBX: 0000000000000812 RCX: 00007f598be2dd82 [ 31.652109] RDX: 0000000000000005 RSI: 0000000000001000 RDI: 00007f598b267000 [ 31.652963] RBP: 00007f598b267000 R08: 0000000000000009 R09: 0000000000001000 [ 31.653795] R10: 0000000000000812 R11: 0000000000000206 R12: 0000556d5159eb20 [ 31.654625] R13: 00007ffd20cbfdb0 R14: 00007ffd20cbfde0 R15: 00007ffd20cc0140 [ 31.655464] [ 31.655754] [ 31.655966] Allocated by task 213: [ 31.656393] kasan_save_stack+0x22/0x50 [ 31.656898] kasan_set_track+0x25/0x30 [ 31.657392] __kasan_slab_alloc+0x59/0x70 [ 31.657909] kmem_cache_alloc+0x16b/0x370 [ 31.658413] vm_area_dup+0x20/0x160 [ 31.658862] __split_vma+0x170/0x950 [ 31.659323] split_vma+0xc6/0x110 [ 31.659755] mprotect_fixup+0x8d2/0xb30 [ 31.660250] do_mprotect_pkey+0x87e/0xd40 [ 31.660768] __x64_sys_mprotect+0x78/0xc0 [ 31.661304] do_syscall_64+0x3f/0x90 [ 31.661769] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 31.662401] [ 31.662615] Freed by task 213: [ 31.662999] kasan_save_stack+0x22/0x50 [ 31.663493] kasan_set_track+0x25/0x30 [ 31.663978] kasan_save_free_info+0x2b/0x50 [ 31.664501] __kasan_slab_free+0x10a/0x190 [ 31.665033] kmem_cache_free+0x10d/0x4d0 [ 31.665535] rcu_core+0x8c8/0x2860 [ 31.665978] __do_softirq+0x1b7/0x7d4 [ 31.666453] [ 31.666670] Last potentially related work creation: [ 31.667249] kasan_save_stack+0x22/0x50 [ 31.667742] __kasan_record_aux_stack+0x8e/0xa0 [ 31.668306] __call_rcu_common.constprop.0+0x6a/0xb90 [ 31.668951] remove_vma+0x139/0x170 [ 31.669397] do_vmi_align_munmap+0xd4a/0x11f0 [ 31.669946] do_vmi_munmap+0x1f1/0x2b0 [ 31.670422] __vm_munmap+0x138/0x3a0 [ 31.670882] __x64_sys_munmap+0x59/0x80 [ 31.671374] do_syscall_64+0x3f/0x90 [ 31.671842] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 31.672476] [ 31.672690] The buggy address belongs to the object at ffff88801678f488 [ 31.672690] which belongs to the cache vm_area_struct of size 168 [ 31.674156] The buggy address is located 88 bytes inside of [ 31.674156] freed 168-byte region [ffff88801678f488, ffff88801678f530) [ 31.675535] [ 31.675750] The buggy address belongs to the physical page: [ 31.676405] page:0000000036187db9 refcount:1 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0x1678f [ 31.677488] memcg:ffff88800c577f01 [ 31.677905] flags: 0x100000000000200(slab|node=0|zone=1) [ 31.678541] page_type: 0xffffffff() [ 31.678989] raw: 0100000000000200 ffff8880087a0c80 dead000000000122 0000000000000000 [ 31.679897] raw: 0000000000000000 0000000000110011 00000001ffffffff ffff88800c577f01 [ 31.680787] page dumped because: kasan: bad access detected [ 31.681457] [ 31.681671] Memory state around the buggy address: [ 31.682244] ffff88801678f380: fc fc fc fc 00 00 00 00 00 00 00 00 00 00 00 00 [ 31.683087] ffff88801678f400: 00 00 00 00 00 00 00 00 00 fc fc fc fc fc fc fc [ 31.683931] >ffff88801678f480: fc fa fb fb fb fb fb fb fb fb fb fb fb fb fb fb [ 31.684767] ^ [ 31.685522] ffff88801678f500: fb fb fb fb fb fb fc fc fc fc fc fc fc fc fa fb [ 31.686365] ffff88801678f580: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb [ 31.687209] ================================================================== [ 31.688164] Disabling lock debugging due to kernel taint Debian GNU/Linux 11 syzkaller ttyS0 syzkaller login: [ 33.481302] BUG: Bad rss-counter state mm:000000002539fd71 type:MM_FILEPAGES val:33 [ 33.482049] BUG: Bad rss-counter state mm:000000002539fd71 type:MM_ANONPAGES val:22 [ 33.860813] BUG: Bad rss-counter state mm:0000000077da649a type:MM_FILEPAGES val:33 [ 33.861851] BUG: Bad rss-counter state mm:0000000077da649a type:MM_ANONPAGES val:22 Warning: Permanently added '[localhost]:28185' (ECDSA) to the list of known hosts. 2023/06/20 16:28:57 fuzzer started 2023/06/20 16:28:58 dialing manager at localhost:36067 2023/06/20 16:28:58 checking machine... 2023/06/20 16:28:58 checking revisions... [ 34.566433] kmemleak: Automatic memory scanning thread ended 2023/06/20 16:28:58 testing simple program... [ 34.615477] cgroup: Unknown subsys name 'net' [ 34.660545] cgroup: Unknown subsys name 'rlimit' executing program executing program executing program VM DIAGNOSIS: 16:28:57 Registers: info registers vcpu 0 RAX=ffff88800dd63bc8 RBX=ffff888019a4ef40 RCX=000000000000000a RDX=00000000000018c0 RSI=ffff88800dd63b80 RDI=ffff8880087c9280 RBP=ffff88806ce09e40 RSP=ffff88806ce09e10 R8 =0000000000000000 R9 =fffffbfff0ba7a6a R10=ffffffff85d3d357 R11=00000000000b6a61 R12=ffff8880087c9280 R13=ffffea0000669300 R14=ffffffff818d9c06 R15=ffff888009733680 RIP=ffffffff81809df3 RFL=00000216 [----AP-] 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 00007f6c83c8a900 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=00007fff0f7d7000 CR3=0000000015836000 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=635f6e6f69737365733a4d41503d706f XMM01=6f6c5f6d61702c78756e696c65735f6d XMM02=61702c74696d7265705f6d61702c7469 XMM03=655f6d61702c7374696d696c5f6d6170 XMM04=3d6c616e696d72657420322e322e302e XMM05=3d656d616e74736f682022646873732f XMM06=746f6f72223d746363612078756e696c XMM07=6e655f6d61702c7374696d696c5f6d61 XMM08=652075253d64692073253d706f000000 XMM09=00000000000000000000000000000000 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=ffff888008c04400 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=00007ffd5340f408 CR3=0000000019e92000 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=2037353a38323a3631203032206e754a XMM01=73732878696e755f6d6170203a5d3932 XMM02=65736f6c63206e6f6973736573203a29 XMM03=755f6d6170203a5d3932325b64687373 XMM04=69662068637573206f4e203a656c6163 XMM05=3a656c696620766e65206e65706f206f XMM06=65733a6468737328766e655f6d617020 XMM07=6b7a79732037353a38323a3631203032 XMM08=69767265733d7373616c63742030733a XMM09=00000000000000000000000000000000 XMM10=00000000000000000000000000000000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000