[ 54.007341] BUG: Bad rss-counter state mm:00000000840221c1 type:MM_FILEPAGES val:33 [ 54.008836] BUG: Bad rss-counter state mm:00000000840221c1 type:MM_ANONPAGES val:22 [ 54.183803] ================================================================== [ 54.184934] BUG: KASAN: slab-use-after-free in vma_interval_tree_remove+0xc75/0xec0 [ 54.185977] Read of size 8 at addr ffff888016581798 by task sshd/228 [ 54.186752] [ 54.186966] CPU: 0 PID: 228 Comm: sshd Not tainted 6.4.0-rc7-next-20230620 #1 [ 54.187855] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS 1.12.0-1 04/01/2014 [ 54.188911] Call Trace: [ 54.189235] [ 54.189518] dump_stack_lvl+0x91/0xf0 [ 54.190007] print_report+0xcc/0x620 [ 54.190487] ? __virt_addr_valid+0x102/0x340 [ 54.191040] ? vma_interval_tree_remove+0xc75/0xec0 [ 54.191658] ? vma_interval_tree_remove+0xc75/0xec0 [ 54.192272] kasan_report+0xbe/0xf0 [ 54.192761] ? vma_interval_tree_remove+0xc75/0xec0 [ 54.193377] vma_interval_tree_remove+0xc75/0xec0 [ 54.193973] vma_prepare+0xc54/0x11a0 [ 54.194451] __split_vma+0x5af/0x950 [ 54.194921] ? __pfx___split_vma+0x10/0x10 [ 54.195446] ? find_held_lock+0x2c/0x110 [ 54.195974] do_vmi_align_munmap+0x2ba/0x11f0 [ 54.196553] ? lock_is_held_type+0x9f/0x120 [ 54.197088] ? __pfx_do_vmi_align_munmap+0x10/0x10 [ 54.197696] ? mtree_range_walk+0x632/0x900 [ 54.198244] ? mas_walk+0x5c7/0x7c0 [ 54.198722] do_vmi_munmap+0x1f1/0x2b0 [ 54.199216] mmap_region+0x1f9/0x2660 [ 54.199698] ? vm_mmap_pgoff+0x15c/0x3a0 [ 54.200206] ? __pfx_arch_get_unmapped_area_topdown+0x10/0x10 [ 54.200931] ? __pfx_lock_acquire+0x10/0x10 [ 54.201464] ? __pfx_mmap_region+0x10/0x10 [ 54.201994] ? security_mmap_addr+0x7d/0xa0 [ 54.202523] ? get_unmapped_area+0x1f5/0x3f0 [ 54.203071] do_mmap+0x854/0xf00 [ 54.203514] vm_mmap_pgoff+0x1a6/0x3a0 [ 54.204008] ? __pfx_vm_mmap_pgoff+0x10/0x10 [ 54.204592] ksys_mmap_pgoff+0x3af/0x500 [ 54.205097] do_syscall_64+0x3f/0x90 [ 54.205579] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 54.206225] RIP: 0033:0x7f4fe9146d82 [ 54.206678] 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 [ 54.208807] RSP: 002b:00007ffe1347f4b8 EFLAGS: 00000206 ORIG_RAX: 0000000000000009 [ 54.209714] RAX: ffffffffffffffda RBX: 0000000000000812 RCX: 00007f4fe9146d82 [ 54.210560] RDX: 0000000000000005 RSI: 0000000000001000 RDI: 00007f4fe8580000 [ 54.211406] RBP: 00007f4fe8580000 R08: 0000000000000009 R09: 0000000000001000 [ 54.212255] R10: 0000000000000812 R11: 0000000000000206 R12: 000055642633dd90 [ 54.213119] R13: 00007ffe1347f4d0 R14: 00007ffe1347f500 R15: 00007ffe1347f860 [ 54.213971] [ 54.214264] [ 54.214478] Allocated by task 216: [ 54.214906] kasan_save_stack+0x22/0x50 [ 54.215411] kasan_set_track+0x25/0x30 [ 54.215901] __kasan_slab_alloc+0x59/0x70 [ 54.216427] kmem_cache_alloc+0x16b/0x370 [ 54.216945] vm_area_dup+0x20/0x160 [ 54.217396] __split_vma+0x170/0x950 [ 54.217860] split_vma+0xc6/0x110 [ 54.218301] mprotect_fixup+0x8d2/0xb30 [ 54.218805] do_mprotect_pkey+0x87e/0xd40 [ 54.219327] __x64_sys_mprotect+0x78/0xc0 [ 54.219845] do_syscall_64+0x3f/0x90 [ 54.220323] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 54.220967] [ 54.221186] Freed by task 203: [ 54.221578] kasan_save_stack+0x22/0x50 [ 54.222088] kasan_set_track+0x25/0x30 [ 54.222580] kasan_save_free_info+0x2b/0x50 [ 54.223122] __kasan_slab_free+0x10a/0x190 [ 54.223665] kmem_cache_free+0x10d/0x4d0 [ 54.224169] rcu_core+0x8c8/0x2860 [ 54.224630] __do_softirq+0x1b7/0x7d4 [ 54.225118] [ 54.225334] Last potentially related work creation: [ 54.225917] kasan_save_stack+0x22/0x50 [ 54.226417] __kasan_record_aux_stack+0x8e/0xa0 [ 54.226990] __call_rcu_common.constprop.0+0x6a/0xb90 [ 54.227628] remove_vma+0x139/0x170 [ 54.228079] do_vmi_align_munmap+0xd4a/0x11f0 [ 54.228644] do_vmi_munmap+0x1f1/0x2b0 [ 54.229129] __vm_munmap+0x138/0x3a0 [ 54.229592] __x64_sys_munmap+0x59/0x80 [ 54.230083] do_syscall_64+0x3f/0x90 [ 54.230554] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 54.231188] [ 54.231403] The buggy address belongs to the object at ffff888016581740 [ 54.231403] which belongs to the cache vm_area_struct of size 168 [ 54.232879] The buggy address is located 88 bytes inside of [ 54.232879] freed 168-byte region [ffff888016581740, ffff8880165817e8) [ 54.234363] [ 54.234582] The buggy address belongs to the physical page: [ 54.235251] page:0000000047ce051b refcount:1 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0x16581 [ 54.236379] memcg:ffff88801015f701 [ 54.236811] flags: 0x100000000000200(slab|node=0|zone=1) [ 54.237472] page_type: 0xffffffff() [ 54.237934] raw: 0100000000000200 ffff8880087a0c80 dead000000000122 0000000000000000 [ 54.238869] raw: 0000000000000000 0000000000110011 00000001ffffffff ffff88801015f701 [ 54.239795] page dumped because: kasan: bad access detected [ 54.240470] [ 54.240685] Memory state around the buggy address: [ 54.241271] ffff888016581680: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 [ 54.242125] ffff888016581700: fc fc fc fc fc fc fc fc fa fb fb fb fb fb fb fb [ 54.242972] >ffff888016581780: fb fb fb fb fb fb fb fb fb fb fb fb fb fc fc fc [ 54.243821] ^ [ 54.244325] ffff888016581800: fc fc fc fc fc fa fb fb fb fb fb fb fb fb fb fb [ 54.245190] ffff888016581880: fb fb fb fb fb fb fb fb fb fb fc fc fc fc fc fc [ 54.246045] ================================================================== [ 54.247239] Disabling lock debugging due to kernel taint Debian GNU/Linux 11 syzkaller ttyS0 syzkaller login: [ 56.893249] BUG: Bad rss-counter state mm:00000000bb5402a9 type:MM_FILEPAGES val:33 [ 56.894234] BUG: Bad rss-counter state mm:00000000bb5402a9 type:MM_ANONPAGES val:22 [ 57.353864] BUG: Bad rss-counter state mm:00000000bee899c3 type:MM_FILEPAGES val:33 [ 57.354865] BUG: Bad rss-counter state mm:00000000bee899c3 type:MM_ANONPAGES val:22 Warning: Permanently added '[localhost]:2811' (ECDSA) to the list of known hosts. 2023/06/20 13:26:08 fuzzer started 2023/06/20 13:26:09 dialing manager at localhost:36067 2023/06/20 13:26:09 checking machine... 2023/06/20 13:26:09 checking revisions... [ 58.093396] kmemleak: Automatic memory scanning thread ended 2023/06/20 13:26:09 testing simple program... [ 58.150290] cgroup: Unknown subsys name 'net' [ 58.211424] cgroup: Unknown subsys name 'rlimit' executing program executing program executing program VM DIAGNOSIS: 13:26:08 Registers: info registers vcpu 0 RAX=ffffffff81390b6d RBX=ffffffff813ad470 RCX=0000000000000001 RDX=1ffff1100d9c135e RSI=ffffffff81390b6d RDI=ffff88806ce09b60 RBP=ffff88806ce09b30 RSP=ffff88806ce09a90 R8 =0000000000000001 R9 =ffff88806ce09ad8 R10=0000000000038001 R11=0000000000009789 R12=ffff88806ce09b60 R13=0000000000000000 R14=ffff888014718000 R15=ffff888017722678 RIP=ffffffff813ad470 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 00007f61fde5e900 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=000055f221624768 CR3=000000000ee76000 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=ffffffffffffffffffffffffffffffff XMM01=30306234386136303638616663356134 XMM02=38303062343861363036386166633561 XMM03=2f6c616e72756f6a2f676f6c2f6e7572 XMM04=99caccc8e025bb0800000000000ae988 XMM05=fc9874ce6a3c9e950000000000131f90 XMM06=94aac670ef06ff650000000000130cc0 XMM07=00000000000000000000000000000000 XMM08=415453454d49545f454d49544c414552 XMM09=00000000000000000000000000000000 XMM10=20200000000020202020202020200000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000 info registers vcpu 1 RAX=ffff88806c400000 RBX=00000000bd5021fc RCX=ffff88806c410fe0 RDX=0000000000000014 RSI=0000000000000001 RDI=00000000c765843c RBP=ffff88800e001970 RSP=ffff8880102771a8 R8 =000000001ac83b83 R9 =fffffbfff0ba7a6a R10=ffffffff85d3d357 R11=00000000000b6a61 R12=0000000000000001 R13=0000000000092cc0 R14=ffff888010277210 R15=0000000000000014 RIP=ffffffff822704d3 RFL=00000206 [-----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 00007f0a77c2d900 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=00007f0a781e4618 CR3=000000000dc16000 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=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