syzkaller login: [ 31.556277] BUG: Bad rss-counter state mm:00000000d90d4ee7 type:MM_FILEPAGES val:33 [ 31.557424] BUG: Bad rss-counter state mm:00000000d90d4ee7 type:MM_ANONPAGES val:22 [ 31.696875] ================================================================== [ 31.697973] BUG: KASAN: slab-use-after-free in vma_interval_tree_remove+0xc75/0xec0 [ 31.699104] Read of size 8 at addr ffff88800d641310 by task sshd/219 [ 31.700138] [ 31.700418] CPU: 1 PID: 219 Comm: sshd Not tainted 6.4.0-rc7-next-20230620 #1 [ 31.701475] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS 1.12.0-1 04/01/2014 [ 31.702393] Call Trace: [ 31.702636] [ 31.702852] dump_stack_lvl+0x91/0xf0 [ 31.703305] print_report+0xcc/0x620 [ 31.703746] ? __virt_addr_valid+0x102/0x340 [ 31.704255] ? vma_interval_tree_remove+0xc75/0xec0 [ 31.704815] ? vma_interval_tree_remove+0xc75/0xec0 [ 31.705374] kasan_report+0xbe/0xf0 [ 31.705796] ? vma_interval_tree_remove+0xc75/0xec0 [ 31.706356] vma_interval_tree_remove+0xc75/0xec0 [ 31.706905] vma_prepare+0xc54/0x11a0 [ 31.707341] __split_vma+0x5af/0x950 [ 31.707780] ? __pfx___split_vma+0x10/0x10 [ 31.708270] ? find_held_lock+0x2c/0x110 [ 31.708741] do_vmi_align_munmap+0x2ba/0x11f0 [ 31.709278] ? lock_is_held_type+0x9f/0x120 [ 31.709775] ? __pfx_do_vmi_align_munmap+0x10/0x10 [ 31.710333] ? mtree_range_walk+0x632/0x900 [ 31.710845] ? mas_walk+0x5c7/0x7c0 [ 31.711282] do_vmi_munmap+0x1f1/0x2b0 [ 31.711731] mmap_region+0x1f9/0x2660 [ 31.712176] ? vm_mmap_pgoff+0x15c/0x3a0 [ 31.712636] ? __pfx_arch_get_unmapped_area_topdown+0x10/0x10 [ 31.713312] ? __pfx_lock_acquire+0x10/0x10 [ 31.713793] ? __pfx_mmap_region+0x10/0x10 [ 31.714271] ? security_mmap_addr+0x7d/0xa0 [ 31.714765] ? get_unmapped_area+0x1f5/0x3f0 [ 31.715274] do_mmap+0x854/0xf00 [ 31.715674] vm_mmap_pgoff+0x1a6/0x3a0 [ 31.716121] ? __pfx_vm_mmap_pgoff+0x10/0x10 [ 31.716625] ksys_mmap_pgoff+0x3af/0x500 [ 31.717093] do_syscall_64+0x3f/0x90 [ 31.717541] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 31.718143] RIP: 0033:0x7f5a3d908d82 [ 31.718563] 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 [ 31.720523] RSP: 002b:00007fffab68a058 EFLAGS: 00000206 ORIG_RAX: 0000000000000009 [ 31.721472] RAX: ffffffffffffffda RBX: 0000000000000812 RCX: 00007f5a3d908d82 [ 31.722463] RDX: 0000000000000005 RSI: 0000000000001000 RDI: 00007f5a3cd42000 [ 31.723458] RBP: 00007f5a3cd42000 R08: 0000000000000009 R09: 0000000000001000 [ 31.724451] R10: 0000000000000812 R11: 0000000000000206 R12: 0000558bf3cc6d90 [ 31.725485] R13: 00007fffab68a070 R14: 00007fffab68a0a0 R15: 00007fffab68a400 [ 31.726504] [ 31.726844] [ 31.727094] Allocated by task 212: [ 31.727597] kasan_save_stack+0x22/0x50 [ 31.728195] kasan_set_track+0x25/0x30 [ 31.728771] __kasan_slab_alloc+0x59/0x70 [ 31.729413] kmem_cache_alloc+0x16b/0x370 [ 31.730017] vm_area_dup+0x20/0x160 [ 31.730545] __split_vma+0x170/0x950 [ 31.731092] split_vma+0xc6/0x110 [ 31.731598] mprotect_fixup+0x8d2/0xb30 [ 31.732184] do_mprotect_pkey+0x87e/0xd40 [ 31.732801] __x64_sys_mprotect+0x78/0xc0 [ 31.733422] do_syscall_64+0x3f/0x90 [ 31.733977] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 31.734747] [ 31.734995] Freed by task 19: [ 31.735461] kasan_save_stack+0x22/0x50 [ 31.736067] kasan_set_track+0x25/0x30 [ 31.736645] kasan_save_free_info+0x2b/0x50 [ 31.737283] __kasan_slab_free+0x10a/0x190 [ 31.737913] kmem_cache_free+0x10d/0x4d0 [ 31.738515] rcu_core+0x8c8/0x2860 [ 31.739037] __do_softirq+0x1b7/0x7d4 [ 31.739600] [ 31.739854] Last potentially related work creation: [ 31.740542] kasan_save_stack+0x22/0x50 [ 31.741266] __kasan_record_aux_stack+0x8e/0xa0 [ 31.741946] __call_rcu_common.constprop.0+0x6a/0xb90 [ 31.742708] remove_vma+0x139/0x170 [ 31.743268] do_vmi_align_munmap+0xd4a/0x11f0 [ 31.743923] do_vmi_munmap+0x1f1/0x2b0 [ 31.744490] __vm_munmap+0x138/0x3a0 [ 31.745034] __x64_sys_munmap+0x59/0x80 [ 31.745637] do_syscall_64+0x3f/0x90 [ 31.746193] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 31.746946] [ 31.747197] The buggy address belongs to the object at ffff88800d6412b8 [ 31.747197] which belongs to the cache vm_area_struct of size 168 [ 31.748933] The buggy address is located 88 bytes inside of [ 31.748933] freed 168-byte region [ffff88800d6412b8, ffff88800d641360) [ 31.750637] [ 31.750902] The buggy address belongs to the physical page: [ 31.751677] page:00000000bb32865e refcount:1 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0xd641 [ 31.752944] memcg:ffff88800d599301 [ 31.753462] flags: 0x100000000000200(slab|node=0|zone=1) [ 31.754216] page_type: 0xffffffff() [ 31.754896] raw: 0100000000000200 ffff8880087a0c80 dead000000000122 0000000000000000 [ 31.756014] raw: 0000000000000000 0000000000110011 00000001ffffffff ffff88800d599301 [ 31.757076] page dumped because: kasan: bad access detected [ 31.757867] [ 31.758117] Memory state around the buggy address: [ 31.758809] ffff88800d641200: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 fc [ 31.759817] ffff88800d641280: fc fc fc fc fc fc fc fa fb fb fb fb fb fb fb fb [ 31.760802] >ffff88800d641300: fb fb fb fb fb fb fb fb fb fb fb fb fc fc fc fc [ 31.761808] ^ [ 31.762345] ffff88800d641380: fc fc fc fc fa fb fb fb fb fb fb fb fb fb fb fb [ 31.763343] ffff88800d641400: fb fb fb fb fb fb fb fb fb fc fc fc fc fc fc fc [ 31.764344] ================================================================== [ 31.765464] Disabling lock debugging due to kernel taint [ 34.108153] BUG: Bad rss-counter state mm:000000002e4bebf2 type:MM_FILEPAGES val:33 [ 34.109255] BUG: Bad rss-counter state mm:000000002e4bebf2 type:MM_ANONPAGES val:22 [ 34.635298] BUG: Bad rss-counter state mm:00000000da835e79 type:MM_FILEPAGES val:33 [ 34.636345] BUG: Bad rss-counter state mm:00000000da835e79 type:MM_ANONPAGES val:22 Warning: Permanently added '[localhost]:24652' (ECDSA) to the list of known hosts. 2023/06/21 10:46:17 fuzzer started 2023/06/21 10:46:17 dialing manager at localhost:36067 2023/06/21 10:46:17 checking machine... 2023/06/21 10:46:17 checking revisions... [ 35.458920] kmemleak: Automatic memory scanning thread ended 2023/06/21 10:46:17 testing simple program... [ 35.503093] cgroup: Unknown subsys name 'net' [ 35.570918] cgroup: Unknown subsys name 'rlimit' executing program executing program executing program VM DIAGNOSIS: 10:46:17 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=0000000000000001 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=00007ffe934f53d8 CR3=0000000005482000 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=00007faf8140f51000005559f8e5a790 XMM02=6f6974707972636e6561737268746977 XMM03=00000000000000000000000000777074 XMM04=40404040404040404040404040404040 XMM05=5a5a5a5a5a5a5a5a5a5a5a5a5a5a5a5a XMM06=20202020202020202020202020202020 XMM07=ffffffffffff00ffffff00ffffff00ff XMM08=00002000000000202020002020200000 XMM09=ffffffffffff00ffffff00ffffff00ff XMM10=00002000000000202020002020200000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000 info registers vcpu 1 RAX=0000000000000001 RBX=0005fea17a32400f RCX=00000000000001ab RDX=0000000000000000 RSI=0000559c5500d240 RDI=0000559c55007360 RBP=0000559c55007360 RSP=00007ffc82208ff8 R8 =0000000000000022 R9 =00007ffc823f0080 R10=00007ffc823f00f0 R11=000000000000f468 R12=0000000000000001 R13=ffffffffffffffff R14=0000000000000000 R15=0000000000000000 RIP=00007fe7995826c0 RFL=00000202 [-------] CPL=3 II=0 A20=1 SMM=0 HLT=0 ES =0000 0000000000000000 00000000 00000000 CS =0033 0000000000000000 ffffffff 00a0fb00 DPL=3 CS64 [-RA] SS =002b 0000000000000000 ffffffff 00c0f300 DPL=3 DS [-WA] DS =0000 0000000000000000 00000000 00000000 FS =0000 00007fe798a0a900 00000000 00000000 GS =0000 0000000000000000 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=00007fa51cf7c650 CR3=000000000f53a000 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=4c59116e7bbcb384c44858b41fb15d13 XMM02=eff9b2d0a8fce9cb000000000011a3e8 XMM03=2c67c8bc2e329bc3000000000011a510 XMM04=372a1e171ab2770c00000000000ae988 XMM05=0c5ad66aaaccc2a10000000000132288 XMM06=806171799158d9670000000000130d08 XMM07=fb795ef6d65770560000000000121280 XMM08=2c67c8bc2e329bc3000000000011a510 XMM09=00000000000000000000000000000000 XMM10=00000000000000000000000000000000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000