syzkaller login: [ 30.569797] BUG: Bad rss-counter state mm:00000000dbbfe92c type:MM_FILEPAGES val:33 [ 30.570825] BUG: Bad rss-counter state mm:00000000dbbfe92c type:MM_ANONPAGES val:22 [ 30.738095] ================================================================== [ 30.739156] BUG: KASAN: slab-use-after-free in vma_interval_tree_remove+0xc75/0xec0 [ 30.740082] Read of size 8 at addr ffff88800fc596b0 by task sshd/220 [ 30.740947] [ 30.741167] CPU: 0 PID: 220 Comm: sshd Not tainted 6.4.0-rc7-next-20230620 #1 [ 30.742017] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS 1.12.0-1 04/01/2014 [ 30.743011] Call Trace: [ 30.743327] [ 30.743610] dump_stack_lvl+0x91/0xf0 [ 30.744114] print_report+0xcc/0x620 [ 30.744597] ? __virt_addr_valid+0x102/0x340 [ 30.745144] ? vma_interval_tree_remove+0xc75/0xec0 [ 30.745757] ? vma_interval_tree_remove+0xc75/0xec0 [ 30.746365] kasan_report+0xbe/0xf0 [ 30.746858] ? vma_interval_tree_remove+0xc75/0xec0 [ 30.747468] vma_interval_tree_remove+0xc75/0xec0 [ 30.748058] vma_prepare+0xc54/0x11a0 [ 30.748527] __split_vma+0x5af/0x950 [ 30.749002] ? __pfx___split_vma+0x10/0x10 [ 30.749532] ? find_held_lock+0x2c/0x110 [ 30.750060] do_vmi_align_munmap+0x2ba/0x11f0 [ 30.750635] ? lock_is_held_type+0x9f/0x120 [ 30.751176] ? __pfx_do_vmi_align_munmap+0x10/0x10 [ 30.751787] ? mtree_range_walk+0x632/0x900 [ 30.752344] ? mas_walk+0x5c7/0x7c0 [ 30.752820] do_vmi_munmap+0x1f1/0x2b0 [ 30.753313] mmap_region+0x1f9/0x2660 [ 30.753799] ? vm_mmap_pgoff+0x15c/0x3a0 [ 30.754316] ? __pfx_arch_get_unmapped_area_topdown+0x10/0x10 [ 30.755055] ? __pfx_lock_acquire+0x10/0x10 [ 30.755590] ? __pfx_mmap_region+0x10/0x10 [ 30.756124] ? security_mmap_addr+0x7d/0xa0 [ 30.756654] ? get_unmapped_area+0x1f5/0x3f0 [ 30.757211] do_mmap+0x854/0xf00 [ 30.757650] vm_mmap_pgoff+0x1a6/0x3a0 [ 30.758150] ? __pfx_vm_mmap_pgoff+0x10/0x10 [ 30.758733] ksys_mmap_pgoff+0x3af/0x500 [ 30.759244] do_syscall_64+0x3f/0x90 [ 30.759721] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 30.760364] RIP: 0033:0x7f5c39453d82 [ 30.760817] 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 [ 30.762936] RSP: 002b:00007ffea4e20cf8 EFLAGS: 00000206 ORIG_RAX: 0000000000000009 [ 30.763838] RAX: ffffffffffffffda RBX: 0000000000000812 RCX: 00007f5c39453d82 [ 30.764681] RDX: 0000000000000005 RSI: 0000000000001000 RDI: 00007f5c3888d000 [ 30.765528] RBP: 00007f5c3888d000 R08: 0000000000000009 R09: 0000000000001000 [ 30.766379] R10: 0000000000000812 R11: 0000000000000206 R12: 000055d25748aec0 [ 30.767236] R13: 00007ffea4e20d10 R14: 00007ffea4e20d40 R15: 00007ffea4e210a0 [ 30.768099] [ 30.768393] [ 30.768611] Allocated by task 213: [ 30.769042] kasan_save_stack+0x22/0x50 [ 30.769549] kasan_set_track+0x25/0x30 [ 30.770047] __kasan_slab_alloc+0x59/0x70 [ 30.770589] kmem_cache_alloc+0x16b/0x370 [ 30.771107] vm_area_dup+0x20/0x160 [ 30.771568] __split_vma+0x170/0x950 [ 30.772038] split_vma+0xc6/0x110 [ 30.772488] mprotect_fixup+0x8d2/0xb30 [ 30.772999] do_mprotect_pkey+0x87e/0xd40 [ 30.773527] __x64_sys_mprotect+0x78/0xc0 [ 30.774056] do_syscall_64+0x3f/0x90 [ 30.774535] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 30.775202] [ 30.775421] Freed by task 210: [ 30.775812] kasan_save_stack+0x22/0x50 [ 30.776318] kasan_set_track+0x25/0x30 [ 30.776812] kasan_save_free_info+0x2b/0x50 [ 30.777347] __kasan_slab_free+0x10a/0x190 [ 30.777878] kmem_cache_free+0x10d/0x4d0 [ 30.778383] rcu_core+0x8c8/0x2860 [ 30.778830] __do_softirq+0x1b7/0x7d4 [ 30.779315] [ 30.779532] Last potentially related work creation: [ 30.780116] kasan_save_stack+0x22/0x50 [ 30.780618] __kasan_record_aux_stack+0x8e/0xa0 [ 30.781187] __call_rcu_common.constprop.0+0x6a/0xb90 [ 30.781823] remove_vma+0x139/0x170 [ 30.782274] do_vmi_align_munmap+0xd4a/0x11f0 [ 30.782848] do_vmi_munmap+0x1f1/0x2b0 [ 30.783335] __vm_munmap+0x138/0x3a0 [ 30.783799] __x64_sys_munmap+0x59/0x80 [ 30.784300] do_syscall_64+0x3f/0x90 [ 30.784772] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 30.785413] [ 30.785628] The buggy address belongs to the object at ffff88800fc59658 [ 30.785628] which belongs to the cache vm_area_struct of size 168 [ 30.787106] The buggy address is located 88 bytes inside of [ 30.787106] freed 168-byte region [ffff88800fc59658, ffff88800fc59700) [ 30.788511] [ 30.788730] The buggy address belongs to the physical page: [ 30.789396] page:0000000070df38c6 refcount:1 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0xfc59 [ 30.790472] memcg:ffff888006849b01 [ 30.790912] flags: 0x100000000000200(slab|node=0|zone=1) [ 30.791559] page_type: 0xffffffff() [ 30.792013] raw: 0100000000000200 ffff8880087a0c80 dead000000000122 0000000000000000 [ 30.792937] raw: 0000000000000000 0000000000110011 00000001ffffffff ffff888006849b01 [ 30.793843] page dumped because: kasan: bad access detected [ 30.794502] [ 30.794732] Memory state around the buggy address: [ 30.795317] ffff88800fc59580: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 [ 30.796173] ffff88800fc59600: 00 00 00 fc fc fc fc fc fc fc fc fa fb fb fb fb [ 30.797025] >ffff88800fc59680: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb [ 30.797871] ^ [ 30.798453] ffff88800fc59700: fc fc fc fc fc fc fc fc fa fb fb fb fb fb fb fb [ 30.799327] ffff88800fc59780: fb fb fb fb fb fb fb fb fb fb fb fb fb fc fc fc [ 30.800179] ================================================================== [ 30.801236] Disabling lock debugging due to kernel taint [ 32.906476] BUG: Bad rss-counter state mm:000000005fe14870 type:MM_FILEPAGES val:33 [ 32.907569] BUG: Bad rss-counter state mm:000000005fe14870 type:MM_ANONPAGES val:22 [ 33.376662] BUG: Bad rss-counter state mm:00000000bafc51ce type:MM_FILEPAGES val:33 [ 33.377666] BUG: Bad rss-counter state mm:00000000bafc51ce type:MM_ANONPAGES val:22 Warning: Permanently added '[localhost]:26679' (ECDSA) to the list of known hosts. 2023/06/21 07:23:38 fuzzer started 2023/06/21 07:23:38 dialing manager at localhost:36067 2023/06/21 07:23:38 checking machine... 2023/06/21 07:23:38 checking revisions... [ 34.084206] kmemleak: Automatic memory scanning thread ended 2023/06/21 07:23:38 testing simple program... [ 34.132509] cgroup: Unknown subsys name 'net' [ 34.189387] cgroup: Unknown subsys name 'rlimit' executing program executing program executing program VM DIAGNOSIS: 07:23:38 Registers: info registers vcpu 0 RAX=000000000000648d RBX=0000000000000200 RCX=ffffffff815343f6 RDX=1ffffffff0ac2cf0 RSI=0000000000000008 RDI=ffffffff85616780 RBP=ffff88806ce3a2c0 RSP=ffff88806ce09e38 R8 =0000000000000000 R9 =fffffbfff0ba7a6a R10=ffffffff85d3d357 R11=ffff888008c04000 R12=ffffffff85616740 R13=0000000000000246 R14=0000000000006489 R15=ffff88806ce3a2d2 RIP=ffffffff8136ab05 RFL=00000046 [---Z-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 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=00007ffe20ab0c38 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=00007f89362c0510000055cac8f8e790 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=ffff7fffffffffff RBX=ffff888009ad47a8 RCX=ffffffff83ab193d RDX=0000000000000000 RSI=0000000000000004 RDI=ffffffff87f97e40 RBP=ffffffff87f97e40 RSP=ffff88800fb274e8 R8 =0000000000000000 R9 =0000000000000000 R10=ffffffff87f97e43 R11=0000090300000903 R12=0000000000000000 R13=00000000000000f5 R14=dffffc0000000000 R15=ffffffff87f97640 RIP=ffffffff8180f079 RFL=00000216 [----AP-] 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 00007f668a516900 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=00007ffcedf3d000 CR3=000000000dc10000 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=74696d7265705f6d61703d73726f746e XMM02=000000000000000000000000000000ff XMM03=5320444f4854454d5f54505952434e45 XMM04=40404040404040404040404040404040 XMM05=5a5a5a5a5a5a5a5a5a5a5a5a5a5a5a5a XMM06=20202020202020202020202020202020 XMM07=00000000000000000000000000000000 XMM08=61662029286e65706f5f746964756100 XMM09=00000000000000000000000000000000 XMM10=00000000000000000000000000000000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000