[ 30.567217] BUG: Bad rss-counter state mm:00000000d8d68af6 type:MM_FILEPAGES val:33 [ 30.568421] BUG: Bad rss-counter state mm:00000000d8d68af6 type:MM_ANONPAGES val:22 [ 30.610616] ================================================================== [ 30.611672] BUG: KASAN: slab-use-after-free in vma_interval_tree_remove+0xc75/0xec0 [ 30.612680] Read of size 8 at addr ffff888014116228 by task sshd/220 [ 30.613642] [ 30.613851] CPU: 1 PID: 220 Comm: sshd Not tainted 6.4.0-rc7-next-20230620 #1 [ 30.614767] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS 1.12.0-1 04/01/2014 [ 30.615884] Call Trace: [ 30.616241] [ 30.616525] dump_stack_lvl+0x91/0xf0 [ 30.617112] print_report+0xcc/0x620 [ 30.617612] ? __virt_addr_valid+0x102/0x340 [ 30.618202] ? vma_interval_tree_remove+0xc75/0xec0 [ 30.618872] ? vma_interval_tree_remove+0xc75/0xec0 [ 30.619475] kasan_report+0xbe/0xf0 [ 30.620030] ? vma_interval_tree_remove+0xc75/0xec0 [ 30.620619] vma_interval_tree_remove+0xc75/0xec0 [ 30.621217] vma_prepare+0xc54/0x11a0 [ 30.621689] __split_vma+0x5af/0x950 [ 30.622153] ? __pfx___split_vma+0x10/0x10 [ 30.622676] ? find_held_lock+0x2c/0x110 [ 30.623193] do_vmi_align_munmap+0x2ba/0x11f0 [ 30.623750] ? lock_is_held_type+0x9f/0x120 [ 30.624284] ? __pfx_do_vmi_align_munmap+0x10/0x10 [ 30.624905] ? mtree_range_walk+0x632/0x900 [ 30.625456] ? mas_walk+0x5c7/0x7c0 [ 30.625924] do_vmi_munmap+0x1f1/0x2b0 [ 30.626420] mmap_region+0x1f9/0x2660 [ 30.626885] ? vm_mmap_pgoff+0x15c/0x3a0 [ 30.627380] ? __pfx_arch_get_unmapped_area_topdown+0x10/0x10 [ 30.628094] ? __pfx_lock_acquire+0x10/0x10 [ 30.628621] ? __pfx_mmap_region+0x10/0x10 [ 30.629159] ? security_mmap_addr+0x7d/0xa0 [ 30.629678] ? get_unmapped_area+0x1f5/0x3f0 [ 30.630205] do_mmap+0x854/0xf00 [ 30.630621] vm_mmap_pgoff+0x1a6/0x3a0 [ 30.631088] ? __pfx_vm_mmap_pgoff+0x10/0x10 [ 30.631620] ksys_mmap_pgoff+0x3af/0x500 [ 30.632099] do_syscall_64+0x3f/0x90 [ 30.632552] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 30.633179] RIP: 0033:0x7f3042ba5d82 [ 30.633611] 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 [ 30.635603] RSP: 002b:00007fff6b41ba28 EFLAGS: 00000206 ORIG_RAX: 0000000000000009 [ 30.636462] RAX: ffffffffffffffda RBX: 0000000000000812 RCX: 00007f3042ba5d82 [ 30.637280] RDX: 0000000000000005 RSI: 0000000000001000 RDI: 00007f3041fdf000 [ 30.638078] RBP: 00007f3041fdf000 R08: 0000000000000009 R09: 0000000000001000 [ 30.638878] R10: 0000000000000812 R11: 0000000000000206 R12: 000055a968bedd90 [ 30.639708] R13: 00007fff6b41ba40 R14: 00007fff6b41ba70 R15: 00007fff6b41bdd0 [ 30.640554] [ 30.640836] [ 30.641065] Allocated by task 213: [ 30.641482] kasan_save_stack+0x22/0x50 [ 30.641982] kasan_set_track+0x25/0x30 [ 30.642469] __kasan_slab_alloc+0x59/0x70 [ 30.642980] kmem_cache_alloc+0x16b/0x370 [ 30.643489] vm_area_dup+0x20/0x160 [ 30.643946] __split_vma+0x170/0x950 [ 30.644407] split_vma+0xc6/0x110 [ 30.644835] mprotect_fixup+0x8d2/0xb30 [ 30.645358] do_mprotect_pkey+0x87e/0xd40 [ 30.645874] __x64_sys_mprotect+0x78/0xc0 [ 30.646400] do_syscall_64+0x3f/0x90 [ 30.646867] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 30.647505] [ 30.647714] Freed by task 203: [ 30.648100] kasan_save_stack+0x22/0x50 [ 30.648595] kasan_set_track+0x25/0x30 [ 30.649094] kasan_save_free_info+0x2b/0x50 [ 30.649626] __kasan_slab_free+0x10a/0x190 [ 30.650155] kmem_cache_free+0x10d/0x4d0 [ 30.650660] rcu_core+0x8c8/0x2860 [ 30.651114] __do_softirq+0x1b7/0x7d4 [ 30.651595] [ 30.651880] Last potentially related work creation: [ 30.652467] kasan_save_stack+0x22/0x50 [ 30.652985] __kasan_record_aux_stack+0x8e/0xa0 [ 30.653556] __call_rcu_common.constprop.0+0x6a/0xb90 [ 30.654194] remove_vma+0x139/0x170 [ 30.654639] do_vmi_align_munmap+0xd4a/0x11f0 [ 30.655193] do_vmi_munmap+0x1f1/0x2b0 [ 30.655677] __vm_munmap+0x138/0x3a0 [ 30.656138] __x64_sys_munmap+0x59/0x80 [ 30.656627] do_syscall_64+0x3f/0x90 [ 30.657110] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 30.657755] [ 30.657968] The buggy address belongs to the object at ffff8880141161d0 [ 30.657968] which belongs to the cache vm_area_struct of size 168 [ 30.659441] The buggy address is located 88 bytes inside of [ 30.659441] freed 168-byte region [ffff8880141161d0, ffff888014116278) [ 30.660840] [ 30.661072] The buggy address belongs to the physical page: [ 30.661726] page:00000000f33761a5 refcount:1 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0x14116 [ 30.662811] memcg:ffff88800ffc1401 [ 30.663232] flags: 0x100000000000200(slab|node=0|zone=1) [ 30.663875] page_type: 0xffffffff() [ 30.664329] raw: 0100000000000200 ffff8880087a0c80 dead000000000122 0000000000000000 [ 30.665263] raw: 0000000000000000 0000000000110011 00000001ffffffff ffff88800ffc1401 [ 30.666153] page dumped because: kasan: bad access detected [ 30.666807] [ 30.667024] Memory state around the buggy address: [ 30.667606] ffff888014116100: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 [ 30.668456] ffff888014116180: 00 00 fc fc fc fc fc fc fc fc fa fb fb fb fb fb [ 30.669300] >ffff888014116200: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fc [ 30.670144] ^ [ 30.670697] ffff888014116280: fc fc fc fc fc fc fc fa fb fb fb fb fb fb fb fb [ 30.671540] ffff888014116300: fb fb fb fb fb fb fb fb fb fb fb fb fc fc fc fc [ 30.672372] ================================================================== [ 30.673324] Disabling lock debugging due to kernel taint Debian GNU/Linux 11 syzkaller ttyS0 syzkaller login: [ 33.777406] BUG: Bad rss-counter state mm:000000009f3f7b52 type:MM_FILEPAGES val:33 [ 33.778314] BUG: Bad rss-counter state mm:000000009f3f7b52 type:MM_ANONPAGES val:22 [ 34.324263] BUG: Bad rss-counter state mm:0000000082c56d71 type:MM_FILEPAGES val:33 [ 34.325470] BUG: Bad rss-counter state mm:0000000082c56d71 type:MM_ANONPAGES val:22 Warning: Permanently added '[localhost]:29158' (ECDSA) to the list of known hosts. 2023/06/20 13:14:43 fuzzer started 2023/06/20 13:14:43 dialing manager at localhost:36067 2023/06/20 13:14:43 checking machine... 2023/06/20 13:14:43 checking revisions... [ 34.936465] kmemleak: Automatic memory scanning thread ended 2023/06/20 13:14:43 testing simple program... [ 34.976755] cgroup: Unknown subsys name 'net' [ 35.026288] cgroup: Unknown subsys name 'rlimit' executing program executing program executing program VM DIAGNOSIS: 13:14:43 Registers: info registers vcpu 0 RAX=dffffc0000000000 RBX=ffff8880141df658 RCX=0000000000000001 RDX=1ffff1100283becc RSI=ffff8880141dff48 RDI=ffff8880141df660 RBP=ffff8880141dff48 RSP=ffff8880141df5b0 R8 =0000000000000001 R9 =ffff8880141df698 R10=0000000000038001 R11=00000000000b5080 R12=0000000000000008 R13=ffff8880141df6a0 R14=ffff8880141dff48 R15=ffff8880141df658 RIP=ffffffff81130445 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 00007f07e31da900 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=00007ffc47266000 CR3=0000000019c3c000 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=ffff88806cf35000 RBX=0000000000000001 RCX=ffffffff8451250e RDX=ffffed100d9e6a01 RSI=0000000000000004 RDI=ffffffff81288ac5 RBP=dffffc0000000000 RSP=ffff888008e07e70 R8 =0000000000000000 R9 =ffffed100d9e6a00 R10=ffff88806cf35003 R11=0000000000000001 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=00007f52e19b7020 CR3=000000000e8a6000 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=34313a3331203032206e754a3e36383c XMM01=7365733a646873732878696e755f6d61 XMM02=736f6c63206e6f6973736573203a296e XMM03=5f6d6170203a5d3932325b6468737320 XMM04=6456774875434142334f726f59427469 XMM05=485320415352203a3268737320383130 XMM06=206d6f726620746f6f7220726f662079 XMM07=00000000000000000000000000000000 XMM08=3a677562656420676f6c737973720000 XMM09=00000000000000000000000000000000 XMM10=00000000000000000000000000000000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000