syzkaller login: [ 86.866625] BUG: Bad rss-counter state mm:000000006dbd2dd1 type:MM_FILEPAGES val:33 [ 86.868273] BUG: Bad rss-counter state mm:000000006dbd2dd1 type:MM_ANONPAGES val:22 [ 87.050246] ================================================================== [ 87.051199] BUG: KASAN: slab-use-after-free in vma_interval_tree_remove+0xc75/0xec0 [ 87.052158] Read of size 8 at addr ffff88800ca436b0 by task sshd/220 [ 87.053082] [ 87.053305] CPU: 1 PID: 220 Comm: sshd Tainted: G L 6.4.0-rc7-next-20230619 #1 [ 87.054377] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS 1.12.0-1 04/01/2014 [ 87.055371] Call Trace: [ 87.055696] [ 87.055992] dump_stack_lvl+0x91/0xf0 [ 87.056493] print_report+0xcc/0x620 [ 87.056980] ? __virt_addr_valid+0x102/0x340 [ 87.057555] ? vma_interval_tree_remove+0xc75/0xec0 [ 87.058208] ? vma_interval_tree_remove+0xc75/0xec0 [ 87.058838] kasan_report+0xbe/0xf0 [ 87.059327] ? vma_interval_tree_remove+0xc75/0xec0 [ 87.059959] vma_interval_tree_remove+0xc75/0xec0 [ 87.060576] vma_prepare+0xc54/0x11a0 [ 87.061071] __split_vma+0x5af/0x950 [ 87.061560] ? __pfx___split_vma+0x10/0x10 [ 87.062113] ? find_held_lock+0x2c/0x110 [ 87.062659] do_vmi_align_munmap+0x2ba/0x11f0 [ 87.063243] ? lock_is_held_type+0x9f/0x120 [ 87.063802] ? __pfx_do_vmi_align_munmap+0x10/0x10 [ 87.064431] ? mtree_range_walk+0x632/0x900 [ 87.065000] ? mas_walk+0x5c7/0x7c0 [ 87.065490] do_vmi_munmap+0x1f1/0x2b0 [ 87.066023] mmap_region+0x1f9/0x2660 [ 87.066510] ? vm_mmap_pgoff+0x15c/0x3a0 [ 87.067046] ? __pfx_arch_get_unmapped_area_topdown+0x10/0x10 [ 87.067785] ? __pfx_lock_acquire+0x10/0x10 [ 87.068329] ? __pfx_mmap_region+0x10/0x10 [ 87.068865] ? security_mmap_addr+0x7d/0xa0 [ 87.069412] ? get_unmapped_area+0x1f5/0x3f0 [ 87.069991] do_mmap+0x854/0xf00 [ 87.070436] vm_mmap_pgoff+0x1a6/0x3a0 [ 87.070938] ? __pfx_vm_mmap_pgoff+0x10/0x10 [ 87.071521] ksys_mmap_pgoff+0x3af/0x500 [ 87.072041] do_syscall_64+0x3f/0x90 [ 87.072528] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 87.073201] RIP: 0033:0x7f17d63a8d82 [ 87.073665] 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 [ 87.076126] RSP: 002b:00007fff96effca8 EFLAGS: 00000206 ORIG_RAX: 0000000000000009 [ 87.077198] RAX: ffffffffffffffda RBX: 0000000000000812 RCX: 00007f17d63a8d82 [ 87.078193] RDX: 0000000000000005 RSI: 0000000000001000 RDI: 00007f17d57e2000 [ 87.079141] RBP: 00007f17d57e2000 R08: 0000000000000009 R09: 0000000000001000 [ 87.080098] R10: 0000000000000812 R11: 0000000000000206 R12: 0000558f34c4bf70 [ 87.081050] R13: 00007fff96effcc0 R14: 00007fff96effcf0 R15: 00007fff96f00050 [ 87.082042] [ 87.082369] [ 87.082612] Allocated by task 213: [ 87.083084] kasan_save_stack+0x22/0x50 [ 87.083626] kasan_set_track+0x25/0x30 [ 87.084156] __kasan_slab_alloc+0x59/0x70 [ 87.084716] kmem_cache_alloc+0x16b/0x370 [ 87.085272] vm_area_dup+0x20/0x160 [ 87.085761] __split_vma+0x170/0x950 [ 87.086273] split_vma+0xc6/0x110 [ 87.086749] mprotect_fixup+0x8d2/0xb30 [ 87.087300] do_mprotect_pkey+0x87e/0xd40 [ 87.087876] __x64_sys_mprotect+0x78/0xc0 [ 87.088438] do_syscall_64+0x3f/0x90 [ 87.088947] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 87.089641] [ 87.089887] Freed by task 213: [ 87.090325] kasan_save_stack+0x22/0x50 [ 87.090874] kasan_set_track+0x25/0x30 [ 87.091410] kasan_save_free_info+0x2b/0x50 [ 87.091986] __kasan_slab_free+0x10a/0x190 [ 87.092565] kmem_cache_free+0x10d/0x4d0 [ 87.093114] rcu_core+0x8c8/0x2860 [ 87.093654] __do_softirq+0x1b7/0x7d4 [ 87.094188] [ 87.094426] Last potentially related work creation: [ 87.095076] kasan_save_stack+0x22/0x50 [ 87.095633] __kasan_record_aux_stack+0x8e/0xa0 [ 87.096274] __call_rcu_common.constprop.0+0x6a/0xb90 [ 87.096989] remove_vma+0x139/0x170 [ 87.097491] do_vmi_align_munmap+0xd4a/0x11f0 [ 87.098138] do_vmi_munmap+0x1f1/0x2b0 [ 87.098679] __vm_munmap+0x138/0x3a0 [ 87.099201] __x64_sys_munmap+0x59/0x80 [ 87.099752] do_syscall_64+0x3f/0x90 [ 87.100288] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 87.101004] [ 87.101242] The buggy address belongs to the object at ffff88800ca43658 [ 87.101242] which belongs to the cache vm_area_struct of size 168 [ 87.102907] The buggy address is located 88 bytes inside of [ 87.102907] freed 168-byte region [ffff88800ca43658, ffff88800ca43700) [ 87.104489] [ 87.104730] The buggy address belongs to the physical page: [ 87.105466] page:000000001c43ac16 refcount:1 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0xca43 [ 87.106698] memcg:ffff888015e02401 [ 87.107174] flags: 0x100000000000200(slab|node=0|zone=1) [ 87.107899] page_type: 0xffffffff() [ 87.108402] raw: 0100000000000200 ffff88800879fc80 dead000000000122 0000000000000000 [ 87.109432] raw: 0000000000000000 0000000000110011 00000001ffffffff ffff888015e02401 [ 87.110458] page dumped because: kasan: bad access detected [ 87.111197] [ 87.111438] Memory state around the buggy address: [ 87.112092] ffff88800ca43580: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 [ 87.113056] ffff88800ca43600: 00 00 00 fc fc fc fc fc fc fc fc fa fb fb fb fb [ 87.114016] >ffff88800ca43680: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb [ 87.114966] ^ [ 87.115618] ffff88800ca43700: fc fc fc fc fc fc fc fc fa fb fb fb fb fb fb fb [ 87.116577] ffff88800ca43780: fb fb fb fb fb fb fb fb fb fb fb fb fb fc fc fc [ 87.117527] ================================================================== [ 87.118583] Disabling lock debugging due to kernel taint [ 89.122339] BUG: Bad rss-counter state mm:000000001be1c3e0 type:MM_FILEPAGES val:33 [ 89.123456] BUG: Bad rss-counter state mm:000000001be1c3e0 type:MM_ANONPAGES val:22 [ 89.609561] BUG: Bad rss-counter state mm:0000000063ecb3cf type:MM_FILEPAGES val:33 [ 89.610680] BUG: Bad rss-counter state mm:0000000063ecb3cf type:MM_ANONPAGES val:22 Warning: Permanently added '[localhost]:48535' (ECDSA) to the list of known hosts. 2023/06/20 10:29:36 fuzzer started 2023/06/20 10:29:37 dialing manager at localhost:44161 2023/06/20 10:29:37 checking machine... 2023/06/20 10:29:37 checking revisions... [ 90.377333] kmemleak: Automatic memory scanning thread ended 2023/06/20 10:29:37 testing simple program... [ 90.427543] cgroup: Unknown subsys name 'net' [ 90.496379] cgroup: Unknown subsys name 'rlimit' executing program executing program executing program VM DIAGNOSIS: 10:28:40 Registers: info registers vcpu 0 RAX=dffffc0000000000 RBX=0000000000000001 RCX=ffffffff81809910 RDX=0000000000008099 RSI=0000000000008099 RDI=ffffffff86507e24 RBP=ffff888008d7f9a8 RSP=ffff888008d7f8e0 R8 =0000000000000000 R9 =ffff888008d7f990 R10=0000000000038001 R11=000000000000fc0f R12=ffff888008d7f9b0 R13=ffff888008d7f998 R14=ffff888008d7f991 R15=ffff888008d7f950 RIP=ffffffff8113077a RFL=00000213 [----A-C] 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 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=00007fba462df618 CR3=000000001ca82000 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=563412feff00545000000000000080fe 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=ffff88806cf35000 RBX=0000000000000001 RCX=ffffffff8450c50e RDX=ffffed100d9e6a01 RSI=0000000000000004 RDI=ffffffff812889a5 RBP=dffffc0000000000 RSP=ffff888008e27e70 R8 =0000000000000000 R9 =ffffed100d9e6a00 R10=ffff88806cf35003 R11=0000000000000001 R12=ffffffff85d3bed0 R13=1ffff110011c4fd3 R14=0000000000000000 R15=0000000000000000 RIP=ffffffff8450d49f 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=00007f7755c857e0 CR3=000000000cb72000 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=e3bab1e8cb0c3192014f0be93cd17c5e XMM02=ec2efd57dc4c00df0000000000122068 XMM03=a4ae1f810208f62c0000000000122138 XMM04=03bbf5f106f4312e00000000000ae988 XMM05=e4cb8bb95a7664b60000000000138fb8 XMM06=f8cb9404ec1db3ff0000000000137e20 XMM07=e042d86d42eb936e0000000000129068 XMM08=a4ae1f810208f62c0000000000122138 XMM09=00000000000000000000000000000000 XMM10=20200000000020202020202020200000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000