[ 38.141082] BUG: Bad rss-counter state mm:00000000b5e44741 type:MM_FILEPAGES val:33 [ 38.141885] BUG: Bad rss-counter state mm:00000000b5e44741 type:MM_ANONPAGES val:22 [ 38.273545] ================================================================== [ 38.274237] BUG: KASAN: slab-use-after-free in vma_interval_tree_remove+0xc75/0xec0 [ 38.275870] Read of size 8 at addr ffff88800e0b7df0 by task sshd/220 [ 38.276324] [ 38.276461] CPU: 1 PID: 220 Comm: sshd Not tainted 6.4.0-rc7-next-20230619 #1 [ 38.276999] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS 1.12.0-1 04/01/2014 [ 38.277677] Call Trace: [ 38.277882] [ 38.278058] dump_stack_lvl+0x91/0xf0 [ 38.278352] print_report+0xcc/0x620 [ 38.278667] ? __virt_addr_valid+0x102/0x340 [ 38.279069] ? vma_interval_tree_remove+0xc75/0xec0 [ 38.279528] ? vma_interval_tree_remove+0xc75/0xec0 [ 38.279957] kasan_report+0xbe/0xf0 [ 38.280286] ? vma_interval_tree_remove+0xc75/0xec0 [ 38.280718] vma_interval_tree_remove+0xc75/0xec0 [ 38.281103] vma_prepare+0xc54/0x11a0 [ 38.281404] __split_vma+0x5af/0x950 [ 38.281728] ? __pfx___split_vma+0x10/0x10 [ 38.282092] ? find_held_lock+0x2c/0x110 [ 38.282454] do_vmi_align_munmap+0x2ba/0x11f0 [ 38.282847] ? lock_is_held_type+0x9f/0x120 [ 38.283220] ? __pfx_do_vmi_align_munmap+0x10/0x10 [ 38.283639] ? mtree_range_walk+0x632/0x900 [ 38.284034] ? mas_walk+0x5c7/0x7c0 [ 38.284363] do_vmi_munmap+0x1f1/0x2b0 [ 38.284694] mmap_region+0x1f9/0x2660 [ 38.285057] ? vm_mmap_pgoff+0x15c/0x3a0 [ 38.285431] ? __pfx_arch_get_unmapped_area_topdown+0x10/0x10 [ 38.285938] ? __pfx_lock_acquire+0x10/0x10 [ 38.286308] ? __pfx_mmap_region+0x10/0x10 [ 38.286738] ? security_mmap_addr+0x7d/0xa0 [ 38.287129] ? get_unmapped_area+0x1f5/0x3f0 [ 38.287430] do_mmap+0x854/0xf00 [ 38.287693] vm_mmap_pgoff+0x1a6/0x3a0 [ 38.287980] ? __pfx_vm_mmap_pgoff+0x10/0x10 [ 38.288291] ksys_mmap_pgoff+0x3af/0x500 [ 38.288574] do_syscall_64+0x3f/0x90 [ 38.288992] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 38.289430] RIP: 0033:0x7f2f9f633d82 [ 38.289737] 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 [ 38.291174] RSP: 002b:00007ffe0db75ff8 EFLAGS: 00000206 ORIG_RAX: 0000000000000009 [ 38.291793] RAX: ffffffffffffffda RBX: 0000000000000812 RCX: 00007f2f9f633d82 [ 38.292373] RDX: 0000000000000005 RSI: 0000000000001000 RDI: 00007f2f9ea6d000 [ 38.292971] RBP: 00007f2f9ea6d000 R08: 0000000000000009 R09: 0000000000001000 [ 38.293552] R10: 0000000000000812 R11: 0000000000000206 R12: 0000556a7b3e4d90 [ 38.294145] R13: 00007ffe0db76010 R14: 00007ffe0db76040 R15: 00007ffe0db763a0 [ 38.294732] [ 38.294935] [ 38.295087] Allocated by task 211: [ 38.295384] kasan_save_stack+0x22/0x50 [ 38.295726] kasan_set_track+0x25/0x30 [ 38.296055] __kasan_slab_alloc+0x59/0x70 [ 38.296395] kmem_cache_alloc+0x16b/0x370 [ 38.296759] vm_area_dup+0x20/0x160 [ 38.297069] __split_vma+0x170/0x950 [ 38.297383] split_vma+0xc6/0x110 [ 38.297681] mprotect_fixup+0x8d2/0xb30 [ 38.298018] do_mprotect_pkey+0x87e/0xd40 [ 38.298360] __x64_sys_mprotect+0x78/0xc0 [ 38.298707] do_syscall_64+0x3f/0x90 [ 38.299027] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 38.299394] [ 38.299516] Freed by task 211: [ 38.299729] kasan_save_stack+0x22/0x50 [ 38.300019] kasan_set_track+0x25/0x30 [ 38.300301] kasan_save_free_info+0x2b/0x50 [ 38.300593] __kasan_slab_free+0x10a/0x190 [ 38.300876] kmem_cache_free+0x10d/0x4d0 [ 38.301143] rcu_core+0x8c8/0x2860 [ 38.301408] __do_softirq+0x1b7/0x7d4 [ 38.301700] [ 38.301815] Last potentially related work creation: [ 38.302122] kasan_save_stack+0x22/0x50 [ 38.302387] __kasan_record_aux_stack+0x8e/0xa0 [ 38.302689] __call_rcu_common.constprop.0+0x6a/0xb90 [ 38.303028] remove_vma+0x139/0x170 [ 38.303269] do_vmi_align_munmap+0xd4a/0x11f0 [ 38.303560] do_vmi_munmap+0x1f1/0x2b0 [ 38.303814] __vm_munmap+0x138/0x3a0 [ 38.304058] __x64_sys_munmap+0x59/0x80 [ 38.304318] do_syscall_64+0x3f/0x90 [ 38.304569] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 38.304982] [ 38.305121] Second to last potentially related work creation: [ 38.305575] kasan_save_stack+0x22/0x50 [ 38.305898] __kasan_record_aux_stack+0x8e/0xa0 [ 38.306278] __call_rcu_common.constprop.0+0x6a/0xb90 [ 38.306707] remove_vma+0x139/0x170 [ 38.307004] do_vmi_align_munmap+0xd4a/0x11f0 [ 38.307311] do_vmi_munmap+0x1f1/0x2b0 [ 38.307567] mmap_region+0x1f9/0x2660 [ 38.307817] do_mmap+0x854/0xf00 [ 38.308046] vm_mmap_pgoff+0x1a6/0x3a0 [ 38.308300] ksys_mmap_pgoff+0x3af/0x500 [ 38.308563] do_syscall_64+0x3f/0x90 [ 38.308835] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 38.309175] [ 38.309301] The buggy address belongs to the object at ffff88800e0b7d98 [ 38.309301] which belongs to the cache vm_area_struct of size 168 [ 38.310146] The buggy address is located 88 bytes inside of [ 38.310146] freed 168-byte region [ffff88800e0b7d98, ffff88800e0b7e40) [ 38.310931] [ 38.311050] The buggy address belongs to the physical page: [ 38.311424] page:000000003f54f607 refcount:1 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0xe0b7 [ 38.312032] memcg:ffff88800e025501 [ 38.312267] flags: 0x100000000000200(slab|node=0|zone=1) [ 38.312746] page_type: 0xffffffff() [ 38.313052] raw: 0100000000000200 ffff88800879fc80 ffffea00003778c0 dead000000000004 [ 38.313657] raw: 0000000000000000 0000000000110011 00000001ffffffff ffff88800e025501 [ 38.314322] page dumped because: kasan: bad access detected [ 38.314756] [ 38.314902] Memory state around the buggy address: [ 38.315298] ffff88800e0b7c80: fc fc fc fc fc fc fa fb fb fb fb fb fb fb fb fb [ 38.315871] ffff88800e0b7d00: fb fb fb fb fb fb fb fb fb fb fb fc fc fc fc fc [ 38.316439] >ffff88800e0b7d80: fc fc fc fa fb fb fb fb fb fb fb fb fb fb fb fb [ 38.316996] ^ [ 38.317485] ffff88800e0b7e00: fb fb fb fb fb fb fb fb fc fc fc fc fc fc fc fc [ 38.317989] ffff88800e0b7e80: fa fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb [ 38.318489] ================================================================== [ 38.319081] Disabling lock debugging due to kernel taint Debian GNU/Linux 11 syzkaller ttyS0 syzkaller login: [ 40.315505] BUG: Bad rss-counter state mm:000000006b85315f type:MM_FILEPAGES val:33 [ 40.316276] BUG: Bad rss-counter state mm:000000006b85315f type:MM_ANONPAGES val:22 [ 40.702520] BUG: Bad rss-counter state mm:000000004456adeb type:MM_FILEPAGES val:33 [ 40.703249] BUG: Bad rss-counter state mm:000000004456adeb type:MM_ANONPAGES val:22 Warning: Permanently added '[localhost]:46485' (ECDSA) to the list of known hosts. 2023/06/20 00:06:52 fuzzer started 2023/06/20 00:06:52 dialing manager at localhost:44161 2023/06/20 00:06:52 checking machine... 2023/06/20 00:06:52 checking revisions... [ 41.261864] kmemleak: Automatic memory scanning thread ended 2023/06/20 00:06:52 testing simple program... [ 41.319350] cgroup: Unknown subsys name 'net' [ 41.378347] cgroup: Unknown subsys name 'rlimit' executing program executing program executing program VM DIAGNOSIS: 00:06:44 Registers: info registers vcpu 0 RAX=dffffc0000000000 RBX=ffff88801bcfdd10 RCX=0000000000000000 RDX=ffffffff87b86c40 RSI=ffffffff848ff060 RDI=ffff88801bcfdd30 RBP=ffff88801bcfdd28 RSP=ffff888016847c00 R8 =0000000000000002 R9 =0000000000000000 R10=ffffffff85d3bed7 R11=00000000000b6996 R12=ffffffff87b86c40 R13=0000000000000000 R14=ffff88801bcfdd58 R15=ffff88801bcfdd10 RIP=ffffffff812db252 RFL=00000296 [--S-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 00007f7739eb0900 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=00007f773a467618 CR3=0000000019dc6000 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=6e69676f6c5f6d61702c78756e696c65 XMM02=755f6d61702c74696d7265705f6d6170 XMM03=2c766e655f6d61702c7374696d696c5f XMM04=6d61702c766e655f6d61702c7374696d XMM05=78696e755f6d61702c74696d7265705f XMM06=6469756e69676f6c5f6d61702c78756e XMM07=672065736f6c635f6e6f69737365733a XMM08=61662029286e65706f5f746964756100 XMM09=00000000000000000000000000000000 XMM10=00000000000000000000000000000000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000 info registers vcpu 1 RAX=ffffffff8186b910 RBX=000000000000000a RCX=ffffffff81378270 RDX=0000000000000000 RSI=0000000000000008 RDI=ffff88800d66cf00 RBP=000000000000000b RSP=ffff88806cf09e60 R8 =0000000000000000 R9 =fffffbfff0ba77da R10=ffffffff85d3bed7 R11=0000000000000000 R12=dffffc0000000000 R13=ffff88806cf09ee8 R14=ffff88806cf35000 R15=ffff88800d66cf00 RIP=ffffffff8186b914 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 =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=00007f62acd0ac30 CR3=000000000e148000 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=2031353a36303a3030203032206e754a XMM01=73732878696e755f6d6170203a5d3932 XMM02=65736f6c63206e6f6973736573203a29 XMM03=755f6d6170203a5d3932325b64687373 XMM04=69662068637573206f4e203a656c6163 XMM05=3a656c696620766e65206e65706f206f XMM06=65733a6468737328766e655f6d617020 XMM07=6b7a79732031353a36303a3030203032 XMM08=3d656e696c646d632022656369767265 XMM09=00000000000000000000000000000000 XMM10=00000000000000000000000000000000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000