syzkaller login: [ 30.286478] BUG: Bad rss-counter state mm:0000000051f6ed8f type:MM_FILEPAGES val:33 [ 30.287725] BUG: Bad rss-counter state mm:0000000051f6ed8f type:MM_ANONPAGES val:22 [ 30.327873] ================================================================== [ 30.329027] BUG: KASAN: slab-use-after-free in vma_interval_tree_remove+0xc75/0xec0 [ 30.330220] Read of size 8 at addr ffff88801a3b5140 by task sshd/220 [ 30.331195] [ 30.331444] CPU: 1 PID: 220 Comm: sshd Not tainted 6.4.0-rc7-next-20230620 #1 [ 30.332460] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS 1.12.0-1 04/01/2014 [ 30.333744] Call Trace: [ 30.334176] [ 30.334497] dump_stack_lvl+0x91/0xf0 [ 30.335042] print_report+0xcc/0x620 [ 30.335583] ? __virt_addr_valid+0x102/0x340 [ 30.336204] ? vma_interval_tree_remove+0xc75/0xec0 [ 30.336891] ? vma_interval_tree_remove+0xc75/0xec0 [ 30.337730] kasan_report+0xbe/0xf0 [ 30.338373] ? vma_interval_tree_remove+0xc75/0xec0 [ 30.339064] vma_interval_tree_remove+0xc75/0xec0 [ 30.339740] vma_prepare+0xc54/0x11a0 [ 30.340348] __split_vma+0x5af/0x950 [ 30.340879] ? __pfx___split_vma+0x10/0x10 [ 30.341466] ? find_held_lock+0x2c/0x110 [ 30.342057] do_vmi_align_munmap+0x2ba/0x11f0 [ 30.342688] ? lock_is_held_type+0x9f/0x120 [ 30.343288] ? __pfx_do_vmi_align_munmap+0x10/0x10 [ 30.343962] ? mtree_range_walk+0x632/0x900 [ 30.344577] ? mas_walk+0x5c7/0x7c0 [ 30.345102] do_vmi_munmap+0x1f1/0x2b0 [ 30.345654] mmap_region+0x1f9/0x2660 [ 30.346191] ? vm_mmap_pgoff+0x15c/0x3a0 [ 30.346754] ? __pfx_arch_get_unmapped_area_topdown+0x10/0x10 [ 30.347542] ? __pfx_lock_acquire+0x10/0x10 [ 30.348132] ? __pfx_mmap_region+0x10/0x10 [ 30.348717] ? security_mmap_addr+0x7d/0xa0 [ 30.349306] ? get_unmapped_area+0x1f5/0x3f0 [ 30.349935] do_mmap+0x854/0xf00 [ 30.350424] vm_mmap_pgoff+0x1a6/0x3a0 [ 30.350972] ? __pfx_vm_mmap_pgoff+0x10/0x10 [ 30.351591] ksys_mmap_pgoff+0x3af/0x500 [ 30.352149] do_syscall_64+0x3f/0x90 [ 30.352680] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 30.353387] RIP: 0033:0x7f785b02bd82 [ 30.353893] 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 [ 30.356174] RSP: 002b:00007ffe313e0958 EFLAGS: 00000206 ORIG_RAX: 0000000000000009 [ 30.357134] RAX: ffffffffffffffda RBX: 0000000000000812 RCX: 00007f785b02bd82 [ 30.358056] RDX: 0000000000000005 RSI: 0000000000001000 RDI: 00007f785a465000 [ 30.358985] RBP: 00007f785a465000 R08: 0000000000000009 R09: 0000000000001000 [ 30.359886] R10: 0000000000000812 R11: 0000000000000206 R12: 0000562ddda28f70 [ 30.360780] R13: 00007ffe313e0970 R14: 00007ffe313e09a0 R15: 00007ffe313e0d00 [ 30.361709] [ 30.362012] [ 30.362245] Allocated by task 213: [ 30.362696] kasan_save_stack+0x22/0x50 [ 30.363230] kasan_set_track+0x25/0x30 [ 30.363764] __kasan_slab_alloc+0x59/0x70 [ 30.364317] kmem_cache_alloc+0x16b/0x370 [ 30.364862] vm_area_dup+0x20/0x160 [ 30.365353] __split_vma+0x170/0x950 [ 30.365860] split_vma+0xc6/0x110 [ 30.366330] mprotect_fixup+0x8d2/0xb30 [ 30.366856] do_mprotect_pkey+0x87e/0xd40 [ 30.367404] __x64_sys_mprotect+0x78/0xc0 [ 30.367952] do_syscall_64+0x3f/0x90 [ 30.368453] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 30.369136] [ 30.369367] Freed by task 213: [ 30.369809] kasan_save_stack+0x22/0x50 [ 30.370345] kasan_set_track+0x25/0x30 [ 30.370868] kasan_save_free_info+0x2b/0x50 [ 30.371426] __kasan_slab_free+0x10a/0x190 [ 30.371996] kmem_cache_free+0x10d/0x4d0 [ 30.372523] rcu_core+0x8c8/0x2860 [ 30.372984] __do_softirq+0x1b7/0x7d4 [ 30.373485] [ 30.373725] Last potentially related work creation: [ 30.374336] kasan_save_stack+0x22/0x50 [ 30.374857] __kasan_record_aux_stack+0x8e/0xa0 [ 30.375458] __call_rcu_common.constprop.0+0x6a/0xb90 [ 30.376135] remove_vma+0x139/0x170 [ 30.376614] do_vmi_align_munmap+0xd4a/0x11f0 [ 30.377197] do_vmi_munmap+0x1f1/0x2b0 [ 30.377722] __vm_munmap+0x138/0x3a0 [ 30.378208] __x64_sys_munmap+0x59/0x80 [ 30.378726] do_syscall_64+0x3f/0x90 [ 30.379220] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 30.379895] [ 30.380119] The buggy address belongs to the object at ffff88801a3b50e8 [ 30.380119] which belongs to the cache vm_area_struct of size 168 [ 30.381668] The buggy address is located 88 bytes inside of [ 30.381668] freed 168-byte region [ffff88801a3b50e8, ffff88801a3b5190) [ 30.383142] [ 30.383367] The buggy address belongs to the physical page: [ 30.384068] page:0000000038e2ccd3 refcount:1 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0x1a3b5 [ 30.385205] memcg:ffff888010365e01 [ 30.385653] flags: 0x100000000000200(slab|node=0|zone=1) [ 30.386321] page_type: 0xffffffff() [ 30.386788] raw: 0100000000000200 ffff8880087a0c80 dead000000000122 0000000000000000 [ 30.387738] raw: 0000000000000000 0000000000110011 00000001ffffffff ffff888010365e01 [ 30.388681] page dumped because: kasan: bad access detected [ 30.389362] [ 30.389583] Memory state around the buggy address: [ 30.390208] ffff88801a3b5000: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 [ 30.391085] ffff88801a3b5080: 00 00 00 00 00 fc fc fc fc fc fc fc fc fa fb fb [ 30.391965] >ffff88801a3b5100: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb [ 30.392846] ^ [ 30.393506] ffff88801a3b5180: fb fb fc fc fc fc fc fc fc fc fa fb fb fb fb fb [ 30.394406] ffff88801a3b5200: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fc [ 30.395289] ================================================================== [ 30.396613] Disabling lock debugging due to kernel taint [ 32.729068] BUG: Bad rss-counter state mm:0000000020b8100b type:MM_FILEPAGES val:33 [ 32.730364] BUG: Bad rss-counter state mm:0000000020b8100b type:MM_ANONPAGES val:22 [ 33.092406] BUG: Bad rss-counter state mm:000000009f51186d type:MM_FILEPAGES val:33 [ 33.093473] BUG: Bad rss-counter state mm:000000009f51186d type:MM_ANONPAGES val:22 Warning: Permanently added '[localhost]:11360' (ECDSA) to the list of known hosts. 2023/06/21 08:29:33 fuzzer started 2023/06/21 08:29:33 dialing manager at localhost:36067 2023/06/21 08:29:33 checking machine... 2023/06/21 08:29:33 checking revisions... [ 33.849814] kmemleak: Automatic memory scanning thread ended 2023/06/21 08:29:34 testing simple program... [ 33.892175] cgroup: Unknown subsys name 'net' [ 33.942958] cgroup: Unknown subsys name 'rlimit' executing program executing program executing program VM DIAGNOSIS: 08:29:33 Registers: info registers vcpu 0 RAX=ffffffff81406a70 RBX=0000000000000000 RCX=1ffffffff0ba7c92 RDX=ffffffffffffffff RSI=0000000000000000 RDI=ffff888017d47f58 RBP=ffff888017d47f48 RSP=ffff888017d47f40 R8 =0000000000000000 R9 =0000000000000000 R10=ffffffff85d3d357 R11=0000000000000000 R12=ffff888017d47f58 R13=0000000000000000 R14=0000000000000000 R15=0000000000000000 RIP=ffffffff8450cc7a 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 00007f913ffff700 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=00007f5e1d349618 CR3=000000001609c000 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=2033333a39323a3830203132206e754a XMM01=73732878696e755f6d6170203a5d3932 XMM02=65736f6c63206e6f6973736573203a29 XMM03=755f6d6170203a5d3932325b64687373 XMM04=69662068637573206f4e203a656c6163 XMM05=3a656c696620766e65206e65706f206f XMM06=65733a6468737328766e655f6d617020 XMM07=6b7a79732033333a39323a3830203132 XMM08=69767265733d7373616c63742030733a 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=00007f3449cb4d60 CR3=000000000ca82000 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=1c45f4b3c0fd3587124c6cec98996f71 XMM02=000000000011abe0ec2efd57dc4c00df XMM03=00000000001216f08f74d3dca6b7f51f XMM04=d7d694f1537e9ade00000000000ae988 XMM05=c1cbb1bca9f7cb1f00000000001319f8 XMM06=4fda316b135da52b0000000000131680 XMM07=e042d86d42eb936e0000000000121970 XMM08=8f74d3dca6b7f51f000000000011ac40 XMM09=00000000000000000000000000000000 XMM10=00000000000000000000000000000000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000