[ 24.009482] BUG: Bad rss-counter state mm:00000000f60e2117 type:MM_FILEPAGES val:33 [ 24.010356] BUG: Bad rss-counter state mm:00000000f60e2117 type:MM_ANONPAGES val:22 [ 24.179709] ================================================================== [ 24.180780] BUG: KASAN: slab-use-after-free in vma_interval_tree_remove+0xc75/0xec0 [ 24.181911] Read of size 8 at addr ffff888009c9d140 by task sshd/219 [ 24.182860] [ 24.183081] CPU: 0 PID: 219 Comm: sshd Not tainted 6.4.0-rc7-next-20230620 #1 [ 24.183969] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS 1.12.0-1 04/01/2014 [ 24.184983] Call Trace: [ 24.185310] [ 24.185618] dump_stack_lvl+0x91/0xf0 [ 24.186163] print_report+0xcc/0x620 [ 24.186723] ? __virt_addr_valid+0x102/0x340 [ 24.187339] ? vma_interval_tree_remove+0xc75/0xec0 [ 24.188024] ? vma_interval_tree_remove+0xc75/0xec0 [ 24.188723] kasan_report+0xbe/0xf0 [ 24.189279] ? vma_interval_tree_remove+0xc75/0xec0 [ 24.189999] vma_interval_tree_remove+0xc75/0xec0 [ 24.190724] vma_prepare+0xc54/0x11a0 [ 24.191282] __split_vma+0x5af/0x950 [ 24.191833] ? __pfx___split_vma+0x10/0x10 [ 24.192446] ? find_held_lock+0x2c/0x110 [ 24.193053] do_vmi_align_munmap+0x2ba/0x11f0 [ 24.193712] ? lock_is_held_type+0x9f/0x120 [ 24.194346] ? __pfx_do_vmi_align_munmap+0x10/0x10 [ 24.195049] ? mtree_range_walk+0x632/0x900 [ 24.195704] ? mas_walk+0x5c7/0x7c0 [ 24.196256] do_vmi_munmap+0x1f1/0x2b0 [ 24.196844] mmap_region+0x1f9/0x2660 [ 24.197403] ? vm_mmap_pgoff+0x15c/0x3a0 [ 24.197975] ? __pfx_arch_get_unmapped_area_topdown+0x10/0x10 [ 24.198787] ? __pfx_lock_acquire+0x10/0x10 [ 24.199379] ? __pfx_mmap_region+0x10/0x10 [ 24.199973] ? security_mmap_addr+0x7d/0xa0 [ 24.200567] ? get_unmapped_area+0x1f5/0x3f0 [ 24.201202] do_mmap+0x854/0xf00 [ 24.201699] vm_mmap_pgoff+0x1a6/0x3a0 [ 24.202248] ? __pfx_vm_mmap_pgoff+0x10/0x10 [ 24.202908] ksys_mmap_pgoff+0x3af/0x500 [ 24.203474] do_syscall_64+0x3f/0x90 [ 24.204016] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 24.204746] RIP: 0033:0x7fe56b4ecd82 [ 24.205260] 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 [ 24.207729] RSP: 002b:00007ffcdcd6b188 EFLAGS: 00000206 ORIG_RAX: 0000000000000009 [ 24.208779] RAX: ffffffffffffffda RBX: 0000000000000812 RCX: 00007fe56b4ecd82 [ 24.209764] RDX: 0000000000000005 RSI: 0000000000001000 RDI: 00007fe56a926000 [ 24.210755] RBP: 00007fe56a926000 R08: 0000000000000009 R09: 0000000000001000 [ 24.211745] R10: 0000000000000812 R11: 0000000000000206 R12: 00005645744fdec0 [ 24.212733] R13: 00007ffcdcd6b1a0 R14: 00007ffcdcd6b1d0 R15: 00007ffcdcd6b530 [ 24.213743] [ 24.214081] [ 24.214351] Allocated by task 209: [ 24.214857] kasan_save_stack+0x22/0x50 [ 24.215442] kasan_set_track+0x25/0x30 [ 24.216022] __kasan_slab_alloc+0x59/0x70 [ 24.216633] kmem_cache_alloc+0x16b/0x370 [ 24.217233] vm_area_dup+0x20/0x160 [ 24.217762] __split_vma+0x170/0x950 [ 24.218308] split_vma+0xc6/0x110 [ 24.218825] mprotect_fixup+0x8d2/0xb30 [ 24.219410] do_mprotect_pkey+0x87e/0xd40 [ 24.220022] __x64_sys_mprotect+0x78/0xc0 [ 24.220638] do_syscall_64+0x3f/0x90 [ 24.221187] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 24.221941] [ 24.222194] Freed by task 209: [ 24.222658] kasan_save_stack+0x22/0x50 [ 24.223246] kasan_set_track+0x25/0x30 [ 24.223822] kasan_save_free_info+0x2b/0x50 [ 24.224442] __kasan_slab_free+0x10a/0x190 [ 24.225067] kmem_cache_free+0x10d/0x4d0 [ 24.225660] rcu_core+0x8c8/0x2860 [ 24.226178] __do_softirq+0x1b7/0x7d4 [ 24.226756] [ 24.227003] Last potentially related work creation: [ 24.227689] kasan_save_stack+0x22/0x50 [ 24.228277] __kasan_record_aux_stack+0x8e/0xa0 [ 24.228942] __call_rcu_common.constprop.0+0x6a/0xb90 [ 24.229693] remove_vma+0x139/0x170 [ 24.230225] do_vmi_align_munmap+0xd4a/0x11f0 [ 24.230886] do_vmi_munmap+0x1f1/0x2b0 [ 24.231457] __vm_munmap+0x138/0x3a0 [ 24.232003] __x64_sys_munmap+0x59/0x80 [ 24.232581] do_syscall_64+0x3f/0x90 [ 24.233131] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 24.233886] [ 24.234133] The buggy address belongs to the object at ffff888009c9d0e8 [ 24.234133] which belongs to the cache vm_area_struct of size 168 [ 24.235870] The buggy address is located 88 bytes inside of [ 24.235870] freed 168-byte region [ffff888009c9d0e8, ffff888009c9d190) [ 24.237515] [ 24.237769] The buggy address belongs to the physical page: [ 24.238554] page:000000004fa79b00 refcount:1 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0x9c9d [ 24.239826] memcg:ffff88800eb21c01 [ 24.240333] flags: 0x100000000000200(slab|node=0|zone=1) [ 24.241088] page_type: 0xffffffff() [ 24.241620] raw: 0100000000000200 ffff8880087a0c80 ffffea0000396ac0 dead000000000006 [ 24.242708] raw: 0000000000000000 0000000000110011 00000001ffffffff ffff88800eb21c01 [ 24.243775] page dumped because: kasan: bad access detected [ 24.244554] [ 24.244808] Memory state around the buggy address: [ 24.245478] ffff888009c9d000: fa fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb [ 24.246511] ffff888009c9d080: fb fb fb fb fb fc fc fc fc fc fc fc fc fa fb fb [ 24.247520] >ffff888009c9d100: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb [ 24.248513] ^ [ 24.249263] ffff888009c9d180: fb fb fc fc fc fc fc fc fc fc 00 00 00 00 00 00 [ 24.250263] ffff888009c9d200: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 fc [ 24.251270] ================================================================== [ 24.252503] Disabling lock debugging due to kernel taint Debian GNU/Linux 11 syzkaller ttyS0 syzkaller login: [ 26.446079] BUG: Bad rss-counter state mm:00000000b63436f4 type:MM_FILEPAGES val:33 [ 26.447371] BUG: Bad rss-counter state mm:00000000b63436f4 type:MM_ANONPAGES val:22 [ 26.928791] BUG: Bad rss-counter state mm:00000000fd1c3f77 type:MM_FILEPAGES val:33 [ 26.929788] BUG: Bad rss-counter state mm:00000000fd1c3f77 type:MM_ANONPAGES val:22 Warning: Permanently added '[localhost]:59924' (ECDSA) to the list of known hosts. 2023/06/20 11:25:54 fuzzer started 2023/06/20 11:25:54 dialing manager at localhost:36067 2023/06/20 11:25:54 checking machine... 2023/06/20 11:25:54 checking revisions... [ 27.688865] kmemleak: Automatic memory scanning thread ended 2023/06/20 11:25:54 testing simple program... [ 27.744975] cgroup: Unknown subsys name 'net' [ 27.798797] cgroup: Unknown subsys name 'rlimit' executing program executing program executing program VM DIAGNOSIS: 11:25:54 Registers: info registers vcpu 0 RAX=ffff888016b3ff08 RBX=0000000000000001 RCX=0000000000000001 RDX=1ffff11002d67edc RSI=ffffffff8363e261 RDI=ffff888016b3f698 RBP=ffff888016b3f6f0 RSP=ffff888016b3f628 R8 =0000000000000001 R9 =ffff888016b3f6d8 R10=0000000000038001 R11=000000000008aa79 R12=ffff888016b3f760 R13=ffff888016b3f6e0 R14=ffff8880169e0000 R15=ffff888016b3f698 RIP=ffffffff81130664 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 00007f7799862900 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=00007ffcb71e6000 CR3=0000000013a74000 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=6720646572637465733a4d41503d706f XMM01=652022746f6f72223d74636361207469 XMM02=3d6c616e696d72657420322e322e302e XMM03=3d656d616e74736f682022646873732f XMM04=40404040404040404040404040404040 XMM05=5a5a5a5a5a5a5a5a5a5a5a5a5a5a5a5a XMM06=20202020202020202020202020202020 XMM07=00000000000000000000000000000000 XMM08=652075253d64692073253d706f000000 XMM09=00000000000000000000000000000000 XMM10=00000000000000000000000000000000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000 info registers vcpu 1 RAX=0000000000000000 RBX=ffff88806cf09b60 RCX=ffffffff864b3801 RDX=1ffff1100d9e136e RSI=ffffffff81288ac5 RDI=ffff88806cf09b70 RBP=ffff88806cf09b30 RSP=ffff88806cf09a78 R8 =ffffffff864b381e R9 =ffff88806cf09ad8 R10=0000000000038001 R11=00000000000b547f R12=ffff88806cf09b60 R13=0000000000000000 R14=ffff888008d951c0 R15=ffff88801b8e88d0 RIP=ffffffff813ad496 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 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=00007fcff7396b30 CR3=00000000097ba000 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=2034353a35323a3131203032206e754a XMM01=73732878696e755f6d6170203a5d3832 XMM02=65736f6c63206e6f6973736573203a29 XMM03=755f6d6170203a5d3832325b64687373 XMM04=69662068637573206f4e203a656c6163 XMM05=3a656c696620766e65206e65706f206f XMM06=65733a6468737328766e655f6d617020 XMM07=6b7a79732033353a35323a3131203032 XMM08=69767265733d7373616c63742030733a XMM09=00000000000000000000000000000000 XMM10=00000000000000000000000000000000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000