syzkaller login: [ 30.470375] BUG: Bad rss-counter state mm:00000000ec596a1c type:MM_FILEPAGES val:33 [ 30.471045] BUG: Bad rss-counter state mm:00000000ec596a1c type:MM_ANONPAGES val:22 [ 30.599596] ================================================================== [ 30.600223] BUG: KASAN: slab-use-after-free in vma_interval_tree_remove+0xc75/0xec0 [ 30.600868] Read of size 8 at addr ffff88800d592798 by task sshd/221 [ 30.601370] [ 30.601512] CPU: 1 PID: 221 Comm: sshd Not tainted 6.4.0-rc7-next-20230620 #1 [ 30.602088] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS 1.12.0-1 04/01/2014 [ 30.602720] Call Trace: [ 30.602932] [ 30.603154] dump_stack_lvl+0x91/0xf0 [ 30.603479] print_report+0xcc/0x620 [ 30.603786] ? __virt_addr_valid+0x102/0x340 [ 30.604130] ? vma_interval_tree_remove+0xc75/0xec0 [ 30.604793] ? vma_interval_tree_remove+0xc75/0xec0 [ 30.605267] kasan_report+0xbe/0xf0 [ 30.605557] ? vma_interval_tree_remove+0xc75/0xec0 [ 30.605944] vma_interval_tree_remove+0xc75/0xec0 [ 30.606396] vma_prepare+0xc54/0x11a0 [ 30.606729] __split_vma+0x5af/0x950 [ 30.607087] ? __pfx___split_vma+0x10/0x10 [ 30.607450] ? find_held_lock+0x2c/0x110 [ 30.607790] do_vmi_align_munmap+0x2ba/0x11f0 [ 30.608258] ? lock_is_held_type+0x9f/0x120 [ 30.608761] ? __pfx_do_vmi_align_munmap+0x10/0x10 [ 30.609202] ? mtree_range_walk+0x632/0x900 [ 30.609615] ? mas_walk+0x5c7/0x7c0 [ 30.609925] do_vmi_munmap+0x1f1/0x2b0 [ 30.610272] mmap_region+0x1f9/0x2660 [ 30.610611] ? vm_mmap_pgoff+0x15c/0x3a0 [ 30.610995] ? __pfx_arch_get_unmapped_area_topdown+0x10/0x10 [ 30.611518] ? __pfx_lock_acquire+0x10/0x10 [ 30.611890] ? __pfx_mmap_region+0x10/0x10 [ 30.612226] ? security_mmap_addr+0x7d/0xa0 [ 30.612602] ? get_unmapped_area+0x1f5/0x3f0 [ 30.612940] do_mmap+0x854/0xf00 [ 30.613215] vm_mmap_pgoff+0x1a6/0x3a0 [ 30.613528] ? __pfx_vm_mmap_pgoff+0x10/0x10 [ 30.613876] ksys_mmap_pgoff+0x3af/0x500 [ 30.614217] do_syscall_64+0x3f/0x90 [ 30.614587] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 30.615078] RIP: 0033:0x7f53adae6d82 [ 30.615388] 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 [ 30.616743] RSP: 002b:00007ffcb9695a18 EFLAGS: 00000206 ORIG_RAX: 0000000000000009 [ 30.617346] RAX: ffffffffffffffda RBX: 0000000000000812 RCX: 00007f53adae6d82 [ 30.617924] RDX: 0000000000000005 RSI: 0000000000001000 RDI: 00007f53acf20000 [ 30.618490] RBP: 00007f53acf20000 R08: 0000000000000009 R09: 0000000000001000 [ 30.619067] R10: 0000000000000812 R11: 0000000000000206 R12: 0000561a9881fd90 [ 30.619619] R13: 00007ffcb9695a30 R14: 00007ffcb9695a60 R15: 00007ffcb9695dc0 [ 30.620149] [ 30.620332] [ 30.620526] Allocated by task 214: [ 30.620800] kasan_save_stack+0x22/0x50 [ 30.621137] kasan_set_track+0x25/0x30 [ 30.621482] __kasan_slab_alloc+0x59/0x70 [ 30.621804] kmem_cache_alloc+0x16b/0x370 [ 30.622124] vm_area_dup+0x20/0x160 [ 30.622454] __split_vma+0x170/0x950 [ 30.622751] split_vma+0xc6/0x110 [ 30.623025] mprotect_fixup+0x8d2/0xb30 [ 30.623387] do_mprotect_pkey+0x87e/0xd40 [ 30.623761] __x64_sys_mprotect+0x78/0xc0 [ 30.624128] do_syscall_64+0x3f/0x90 [ 30.624495] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 30.624989] [ 30.625126] Freed by task 13: [ 30.625367] kasan_save_stack+0x22/0x50 [ 30.625724] kasan_set_track+0x25/0x30 [ 30.626095] kasan_save_free_info+0x2b/0x50 [ 30.626497] __kasan_slab_free+0x10a/0x190 [ 30.626889] kmem_cache_free+0x10d/0x4d0 [ 30.627259] rcu_core+0x8c8/0x2860 [ 30.627572] __do_softirq+0x1b7/0x7d4 [ 30.627887] [ 30.628039] Last potentially related work creation: [ 30.628439] kasan_save_stack+0x22/0x50 [ 30.628819] __kasan_record_aux_stack+0x8e/0xa0 [ 30.629242] __call_rcu_common.constprop.0+0x6a/0xb90 [ 30.629698] remove_vma+0x139/0x170 [ 30.630017] do_vmi_align_munmap+0xd4a/0x11f0 [ 30.630375] do_vmi_munmap+0x1f1/0x2b0 [ 30.630691] __vm_munmap+0x138/0x3a0 [ 30.630994] __x64_sys_munmap+0x59/0x80 [ 30.631339] do_syscall_64+0x3f/0x90 [ 30.631666] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 30.632132] [ 30.632287] Second to last potentially related work creation: [ 30.632825] kasan_save_stack+0x22/0x50 [ 30.633220] __kasan_record_aux_stack+0x8e/0xa0 [ 30.633623] __call_rcu_common.constprop.0+0x6a/0xb90 [ 30.634072] remove_vma+0x139/0x170 [ 30.634399] do_vmi_align_munmap+0xd4a/0x11f0 [ 30.634803] do_vmi_munmap+0x1f1/0x2b0 [ 30.635131] mmap_region+0x1f9/0x2660 [ 30.635449] do_mmap+0x854/0xf00 [ 30.635739] vm_mmap_pgoff+0x1a6/0x3a0 [ 30.636065] ksys_mmap_pgoff+0x3af/0x500 [ 30.636416] do_syscall_64+0x3f/0x90 [ 30.636772] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 30.637173] [ 30.637309] The buggy address belongs to the object at ffff88800d592740 [ 30.637309] which belongs to the cache vm_area_struct of size 168 [ 30.638237] The buggy address is located 88 bytes inside of [ 30.638237] freed 168-byte region [ffff88800d592740, ffff88800d5927e8) [ 30.639160] [ 30.639310] The buggy address belongs to the physical page: [ 30.639744] page:0000000003fd920a refcount:1 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0xd592 [ 30.640542] memcg:ffff888015b80801 [ 30.640830] flags: 0x100000000000200(slab|node=0|zone=1) [ 30.641267] page_type: 0xffffffff() [ 30.641575] raw: 0100000000000200 ffff8880087a0c80 ffffea0000507e80 dead000000000006 [ 30.642205] raw: 0000000000000000 0000000000110011 00000001ffffffff ffff888015b80801 [ 30.642833] page dumped because: kasan: bad access detected [ 30.643279] [ 30.643433] Memory state around the buggy address: [ 30.643825] ffff88800d592680: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 [ 30.644445] ffff88800d592700: fc fc fc fc fc fc fc fc fa fb fb fb fb fb fb fb [ 30.645039] >ffff88800d592780: fb fb fb fb fb fb fb fb fb fb fb fb fb fc fc fc [ 30.645572] ^ [ 30.645872] ffff88800d592800: fc fc fc fc fc 00 00 00 00 00 00 00 00 00 00 00 [ 30.646445] ffff88800d592880: 00 00 00 00 00 00 00 00 00 00 fc fc fc fc fc fc [ 30.647004] ================================================================== [ 30.647986] Disabling lock debugging due to kernel taint [ 32.258313] BUG: Bad rss-counter state mm:00000000dbaab876 type:MM_FILEPAGES val:33 [ 32.258960] BUG: Bad rss-counter state mm:00000000dbaab876 type:MM_ANONPAGES val:22 [ 32.604902] BUG: Bad rss-counter state mm:00000000d320b0fb type:MM_FILEPAGES val:33 [ 32.605730] BUG: Bad rss-counter state mm:00000000d320b0fb type:MM_ANONPAGES val:22 Warning: Permanently added '[localhost]:47877' (ECDSA) to the list of known hosts. 2023/06/21 08:56:52 fuzzer started 2023/06/21 08:56:52 dialing manager at localhost:36067 2023/06/21 08:56:52 checking machine... 2023/06/21 08:56:52 checking revisions... [ 33.211468] kmemleak: Automatic memory scanning thread ended 2023/06/21 08:56:53 testing simple program... [ 33.249048] cgroup: Unknown subsys name 'net' [ 33.283983] cgroup: Unknown subsys name 'rlimit' executing program executing program executing program VM DIAGNOSIS: 08:56:52 Registers: info registers vcpu 0 RAX=ffff88806ce35000 RBX=0000000000000000 RCX=ffffffff8451250e RDX=ffffed100d9c6a01 RSI=0000000000000004 RDI=ffffffff81288ac5 RBP=dffffc0000000000 RSP=ffffffff85407e10 R8 =0000000000000000 R9 =ffffed100d9c6a00 R10=ffff88806ce35003 R11=ffff888008c04000 R12=ffffffff85d3d350 R13=1ffffffff0a80fc7 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 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=00007f89a77139a0 CR3=000000000e8c8000 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=00000000000000000000000000000000 XMM01=4593e1a12b44358d7249559c0e15d73a XMM02=2c67c8bc2e329bc3000000000011a310 XMM03=fb795ef6d65770560000000000121778 XMM04=d9cb4379488236ec00000000000ae988 XMM05=e4cb8bb95a7664b60000000000132888 XMM06=4c623e6a1e072fec00000000001316f0 XMM07=e042d86d42eb936e00000000001219f8 XMM08=c72739bdaff1ab27000000000011a370 XMM09=00000000000000000000000000000000 XMM10=00000000000000000000000000000000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000 info registers vcpu 1 RAX=0000000000000000 RBX=0000000000000000 RCX=0000000000000000 RDX=ffff8880168dd1c0 RSI=ffffffff814c8575 RDI=ffff8880168dd5b4 RBP=0000000000000000 RSP=ffff88801602f5e8 R8 =0000000000000005 R9 =0000000000000000 R10=0000000000000000 R11=00000000000b6a61 R12=0000000000000000 R13=0000000000000000 R14=ffffffff85652c08 R15=0000000000092cc0 RIP=ffffffff814c858b RFL=00000293 [--S-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 00007f8fe61df900 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=00007ffee52ea000 CR3=000000000d9c6000 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=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