[ 24.100204] BUG: Bad rss-counter state mm:0000000029c20546 type:MM_FILEPAGES val:33 [ 24.101361] BUG: Bad rss-counter state mm:0000000029c20546 type:MM_ANONPAGES val:22 [ 24.264485] ================================================================== [ 24.265389] BUG: KASAN: slab-use-after-free in vma_interval_tree_remove+0xc75/0xec0 [ 24.266327] Read of size 8 at addr ffff88801a1f8df0 by task sshd/218 [ 24.267137] [ 24.267362] CPU: 1 PID: 218 Comm: sshd Not tainted 6.4.0-rc7-next-20230620 #1 [ 24.268427] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS 1.12.0-1 04/01/2014 [ 24.269396] Call Trace: [ 24.269714] [ 24.269999] dump_stack_lvl+0x91/0xf0 [ 24.270599] print_report+0xcc/0x620 [ 24.271199] ? __virt_addr_valid+0x102/0x340 [ 24.271873] ? vma_interval_tree_remove+0xc75/0xec0 [ 24.272639] ? vma_interval_tree_remove+0xc75/0xec0 [ 24.273374] kasan_report+0xbe/0xf0 [ 24.273934] ? vma_interval_tree_remove+0xc75/0xec0 [ 24.274675] vma_interval_tree_remove+0xc75/0xec0 [ 24.275410] vma_prepare+0xc54/0x11a0 [ 24.275997] __split_vma+0x5af/0x950 [ 24.276588] ? __pfx___split_vma+0x10/0x10 [ 24.277245] ? find_held_lock+0x2c/0x110 [ 24.277898] do_vmi_align_munmap+0x2ba/0x11f0 [ 24.278599] ? lock_is_held_type+0x9f/0x120 [ 24.279264] ? __pfx_do_vmi_align_munmap+0x10/0x10 [ 24.280008] ? mtree_range_walk+0x632/0x900 [ 24.280726] ? mas_walk+0x5c7/0x7c0 [ 24.281247] do_vmi_munmap+0x1f1/0x2b0 [ 24.281736] mmap_region+0x1f9/0x2660 [ 24.282220] ? vm_mmap_pgoff+0x15c/0x3a0 [ 24.282731] ? __pfx_arch_get_unmapped_area_topdown+0x10/0x10 [ 24.283443] ? __pfx_lock_acquire+0x10/0x10 [ 24.283987] ? __pfx_mmap_region+0x10/0x10 [ 24.284586] ? security_mmap_addr+0x7d/0xa0 [ 24.285143] ? get_unmapped_area+0x1f5/0x3f0 [ 24.285712] do_mmap+0x854/0xf00 [ 24.286188] vm_mmap_pgoff+0x1a6/0x3a0 [ 24.286704] ? __pfx_vm_mmap_pgoff+0x10/0x10 [ 24.287290] ksys_mmap_pgoff+0x3af/0x500 [ 24.287800] do_syscall_64+0x3f/0x90 [ 24.288289] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 24.288936] RIP: 0033:0x7fe71a7d9d82 [ 24.289424] 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 [ 24.291570] RSP: 002b:00007ffe97675a48 EFLAGS: 00000206 ORIG_RAX: 0000000000000009 [ 24.292494] RAX: ffffffffffffffda RBX: 0000000000000812 RCX: 00007fe71a7d9d82 [ 24.293347] RDX: 0000000000000005 RSI: 0000000000001000 RDI: 00007fe719c13000 [ 24.294197] RBP: 00007fe719c13000 R08: 0000000000000009 R09: 0000000000001000 [ 24.295052] R10: 0000000000000812 R11: 0000000000000206 R12: 0000561021e47d90 [ 24.295901] R13: 00007ffe97675a60 R14: 00007ffe97675a90 R15: 00007ffe97675df0 [ 24.296807] [ 24.297119] [ 24.297340] Allocated by task 206: [ 24.297787] kasan_save_stack+0x22/0x50 [ 24.298317] kasan_set_track+0x25/0x30 [ 24.298832] __kasan_slab_alloc+0x59/0x70 [ 24.299377] kmem_cache_alloc+0x16b/0x370 [ 24.299918] vm_area_dup+0x20/0x160 [ 24.300407] __split_vma+0x170/0x950 [ 24.300886] split_vma+0xc6/0x110 [ 24.301359] mprotect_fixup+0x8d2/0xb30 [ 24.301893] do_mprotect_pkey+0x87e/0xd40 [ 24.302433] __x64_sys_mprotect+0x78/0xc0 [ 24.302971] do_syscall_64+0x3f/0x90 [ 24.303464] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 24.304152] [ 24.304371] Freed by task 206: [ 24.304783] kasan_save_stack+0x22/0x50 [ 24.305304] kasan_set_track+0x25/0x30 [ 24.305825] kasan_save_free_info+0x2b/0x50 [ 24.306386] __kasan_slab_free+0x10a/0x190 [ 24.306944] kmem_cache_free+0x10d/0x4d0 [ 24.307468] rcu_core+0x8c8/0x2860 [ 24.307933] __do_softirq+0x1b7/0x7d4 [ 24.308446] [ 24.308669] Last potentially related work creation: [ 24.309282] kasan_save_stack+0x22/0x50 [ 24.309882] __kasan_record_aux_stack+0x8e/0xa0 [ 24.310485] __call_rcu_common.constprop.0+0x6a/0xb90 [ 24.311150] remove_vma+0x139/0x170 [ 24.311615] do_vmi_align_munmap+0xd4a/0x11f0 [ 24.312218] do_vmi_munmap+0x1f1/0x2b0 [ 24.312723] __vm_munmap+0x138/0x3a0 [ 24.313215] __x64_sys_munmap+0x59/0x80 [ 24.313734] do_syscall_64+0x3f/0x90 [ 24.314233] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 24.314909] [ 24.315138] The buggy address belongs to the object at ffff88801a1f8d98 [ 24.315138] which belongs to the cache vm_area_struct of size 168 [ 24.316674] The buggy address is located 88 bytes inside of [ 24.316674] freed 168-byte region [ffff88801a1f8d98, ffff88801a1f8e40) [ 24.318141] [ 24.318360] The buggy address belongs to the physical page: [ 24.319058] page:000000001235df99 refcount:1 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0x1a1f8 [ 24.320226] memcg:ffff88801a1b6d01 [ 24.320672] flags: 0x100000000000200(slab|node=0|zone=1) [ 24.321338] page_type: 0xffffffff() [ 24.321856] raw: 0100000000000200 ffff8880087a0c80 dead000000000122 0000000000000000 [ 24.322825] raw: 0000000000000000 0000000000110011 00000001ffffffff ffff88801a1b6d01 [ 24.323795] page dumped because: kasan: bad access detected [ 24.324499] [ 24.324719] Memory state around the buggy address: [ 24.325322] ffff88801a1f8c80: fc fc fc fc fc fc 00 00 00 00 00 00 00 00 00 00 [ 24.326217] ffff88801a1f8d00: 00 00 00 00 00 00 00 00 00 00 00 fc fc fc fc fc [ 24.327118] >ffff88801a1f8d80: fc fc fc fa fb fb fb fb fb fb fb fb fb fb fb fb [ 24.328010] ^ [ 24.328865] ffff88801a1f8e00: fb fb fb fb fb fb fb fb fc fc fc fc fc fc fc fc [ 24.329767] ffff88801a1f8e80: fa fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb [ 24.330660] ================================================================== [ 24.331631] Disabling lock debugging due to kernel taint Debian GNU/Linux 11 syzkaller ttyS0 syzkaller login: [ 26.441363] BUG: Bad rss-counter state mm:00000000b71abb58 type:MM_FILEPAGES val:33 [ 26.442306] BUG: Bad rss-counter state mm:00000000b71abb58 type:MM_ANONPAGES val:22 [ 26.877357] BUG: Bad rss-counter state mm:00000000c8db6512 type:MM_FILEPAGES val:33 [ 26.878301] BUG: Bad rss-counter state mm:00000000c8db6512 type:MM_ANONPAGES val:22 Warning: Permanently added '[localhost]:4550' (ECDSA) to the list of known hosts. 2023/06/20 21:26:44 fuzzer started 2023/06/20 21:26:44 dialing manager at localhost:36067 2023/06/20 21:26:45 checking machine... 2023/06/20 21:26:45 checking revisions... [ 27.629657] kmemleak: Automatic memory scanning thread ended 2023/06/20 21:26:45 testing simple program... [ 27.674940] cgroup: Unknown subsys name 'net' [ 27.739871] cgroup: Unknown subsys name 'rlimit' executing program executing program executing program VM DIAGNOSIS: 21:26:44 Registers: info registers vcpu 0 RAX=ffff88806ce35000 RBX=0000000000000000 RCX=ffffffff8451250e RDX=ffffed100d9c6a01 RSI=0000000000000004 RDI=ffffffff81288ac5 RBP=dffffc0000000000 RSP=ffffffff85407e10 R8 =0000000000000000 R9 =ffffed100d9c6a00 R10=ffff88806ce35003 R11=ffff888008c04000 R12=ffffffff85d3d350 R13=1ffffffff0a80fc7 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 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=00007ffe4f24a518 CR3=000000000e304000 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=2034343a36323a3132203032206e754a XMM01=657463656e6e6f63736944203a5d3732 XMM02=302e303120746f6f722072657375206d XMM03=203a5d3732325b646873732072656c6c XMM04=69662068637573206f4e203a656c6163 XMM05=3a656c696620766e65206e65706f206f XMM06=65733a6468737328766e655f6d617020 XMM07=6b7a79732034343a36323a3132203032 XMM08=3d656e696c646d632022656369767265 XMM09=00000000000000000000000000000000 XMM10=00000000000000000000000000000000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000 info registers vcpu 1 RAX=0000000000000000 RBX=ffff88800cbc6000 RCX=ffff88800cbc6000 RDX=000000008010000d RSI=ffff88800cbc6000 RDI=ffff88800844f140 RBP=ffff88800fc17c68 RSP=ffff88800fc17bd0 R8 =000000008010000c R9 =0000000000000000 R10=ffffea000032f100 R11=0000000080200003 R12=ffffea000032f100 R13=ffff88800cbc7800 R14=000000008010000c R15=ffff88800844f140 RIP=ffffffff81809672 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 00007fb273a20900 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=00007ffe3bf0b000 CR3=000000000e7fc000 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=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