syzkaller login: [ 31.598886] BUG: Bad rss-counter state mm:0000000060967b4c type:MM_FILEPAGES val:33 [ 31.599921] BUG: Bad rss-counter state mm:0000000060967b4c type:MM_ANONPAGES val:22 [ 31.764392] ================================================================== [ 31.765480] BUG: KASAN: slab-use-after-free in vma_interval_tree_remove+0xc75/0xec0 [ 31.766620] Read of size 8 at addr ffff88800dcd6310 by task sshd/218 [ 31.767644] [ 31.767862] CPU: 1 PID: 218 Comm: sshd Not tainted 6.4.0-rc7-next-20230619 #1 [ 31.768728] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS 1.12.0-1 04/01/2014 [ 31.769726] Call Trace: [ 31.770044] [ 31.770341] dump_stack_lvl+0x91/0xf0 [ 31.770840] print_report+0xcc/0x620 [ 31.771325] ? __virt_addr_valid+0x102/0x340 [ 31.771881] ? vma_interval_tree_remove+0xc75/0xec0 [ 31.772503] ? vma_interval_tree_remove+0xc75/0xec0 [ 31.773115] kasan_report+0xbe/0xf0 [ 31.773591] ? vma_interval_tree_remove+0xc75/0xec0 [ 31.774207] vma_interval_tree_remove+0xc75/0xec0 [ 31.774880] vma_prepare+0xc54/0x11a0 [ 31.775379] __split_vma+0x5af/0x950 [ 31.775851] ? __pfx___split_vma+0x10/0x10 [ 31.776391] ? find_held_lock+0x2c/0x110 [ 31.776924] do_vmi_align_munmap+0x2ba/0x11f0 [ 31.777522] ? lock_is_held_type+0x9f/0x120 [ 31.778100] ? __pfx_do_vmi_align_munmap+0x10/0x10 [ 31.778765] ? mtree_range_walk+0x632/0x900 [ 31.779351] ? mas_walk+0x5c7/0x7c0 [ 31.779851] do_vmi_munmap+0x1f1/0x2b0 [ 31.780366] mmap_region+0x1f9/0x2660 [ 31.780873] ? vm_mmap_pgoff+0x15c/0x3a0 [ 31.781424] ? __pfx_arch_get_unmapped_area_topdown+0x10/0x10 [ 31.782184] ? __pfx_lock_acquire+0x10/0x10 [ 31.782763] ? __pfx_mmap_region+0x10/0x10 [ 31.783327] ? security_mmap_addr+0x7d/0xa0 [ 31.783892] ? get_unmapped_area+0x1f5/0x3f0 [ 31.784476] do_mmap+0x854/0xf00 [ 31.784940] vm_mmap_pgoff+0x1a6/0x3a0 [ 31.785461] ? __pfx_vm_mmap_pgoff+0x10/0x10 [ 31.786047] ksys_mmap_pgoff+0x3af/0x500 [ 31.786590] do_syscall_64+0x3f/0x90 [ 31.787101] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 31.787776] RIP: 0033:0x7fbd46428d82 [ 31.788259] 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 [ 31.790530] RSP: 002b:00007ffec347e1b8 EFLAGS: 00000206 ORIG_RAX: 0000000000000009 [ 31.791498] RAX: ffffffffffffffda RBX: 0000000000000812 RCX: 00007fbd46428d82 [ 31.792394] RDX: 0000000000000005 RSI: 0000000000001000 RDI: 00007fbd45862000 [ 31.793299] RBP: 00007fbd45862000 R08: 0000000000000009 R09: 0000000000001000 [ 31.794223] R10: 0000000000000812 R11: 0000000000000206 R12: 00005596d333aec0 [ 31.795126] R13: 00007ffec347e1d0 R14: 00007ffec347e200 R15: 00007ffec347e560 [ 31.796040] [ 31.796346] [ 31.796569] Allocated by task 211: [ 31.797017] kasan_save_stack+0x22/0x50 [ 31.797556] kasan_set_track+0x25/0x30 [ 31.798079] __kasan_slab_alloc+0x59/0x70 [ 31.798635] kmem_cache_alloc+0x16b/0x370 [ 31.799205] vm_area_dup+0x20/0x160 [ 31.799692] __split_vma+0x170/0x950 [ 31.800195] split_vma+0xc6/0x110 [ 31.800660] mprotect_fixup+0x8d2/0xb30 [ 31.801195] do_mprotect_pkey+0x87e/0xd40 [ 31.801754] __x64_sys_mprotect+0x78/0xc0 [ 31.802308] do_syscall_64+0x3f/0x90 [ 31.802815] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 31.803490] [ 31.803713] Freed by task 211: [ 31.804128] kasan_save_stack+0x22/0x50 [ 31.804647] kasan_set_track+0x25/0x30 [ 31.805161] kasan_save_free_info+0x2b/0x50 [ 31.805698] __kasan_slab_free+0x10a/0x190 [ 31.806230] kmem_cache_free+0x10d/0x4d0 [ 31.806754] rcu_core+0x8c8/0x2860 [ 31.807205] __do_softirq+0x1b7/0x7d4 [ 31.807682] [ 31.807898] Last potentially related work creation: [ 31.808546] kasan_save_stack+0x22/0x50 [ 31.809047] __kasan_record_aux_stack+0x8e/0xa0 [ 31.809621] __call_rcu_common.constprop.0+0x6a/0xb90 [ 31.810272] remove_vma+0x139/0x170 [ 31.810737] do_vmi_align_munmap+0xd4a/0x11f0 [ 31.811297] do_vmi_munmap+0x1f1/0x2b0 [ 31.811781] __vm_munmap+0x138/0x3a0 [ 31.812252] __x64_sys_munmap+0x59/0x80 [ 31.812747] do_syscall_64+0x3f/0x90 [ 31.813216] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 31.813906] [ 31.814117] Second to last potentially related work creation: [ 31.814819] kasan_save_stack+0x22/0x50 [ 31.815323] __kasan_record_aux_stack+0x8e/0xa0 [ 31.815905] __call_rcu_common.constprop.0+0x6a/0xb90 [ 31.816565] remove_vma+0x139/0x170 [ 31.817023] do_vmi_align_munmap+0xd4a/0x11f0 [ 31.817584] do_vmi_munmap+0x1f1/0x2b0 [ 31.818083] mmap_region+0x1f9/0x2660 [ 31.818576] do_mmap+0x854/0xf00 [ 31.819024] vm_mmap_pgoff+0x1a6/0x3a0 [ 31.819507] ksys_mmap_pgoff+0x3af/0x500 [ 31.820010] do_syscall_64+0x3f/0x90 [ 31.820480] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 31.821113] [ 31.821332] The buggy address belongs to the object at ffff88800dcd62b8 [ 31.821332] which belongs to the cache vm_area_struct of size 168 [ 31.822792] The buggy address is located 88 bytes inside of [ 31.822792] freed 168-byte region [ffff88800dcd62b8, ffff88800dcd6360) [ 31.824234] [ 31.824445] The buggy address belongs to the physical page: [ 31.825136] page:0000000071270922 refcount:1 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0xdcd6 [ 31.826265] memcg:ffff8880095df201 [ 31.826719] flags: 0x100000000000200(slab|node=0|zone=1) [ 31.827410] page_type: 0xffffffff() [ 31.827863] raw: 0100000000000200 ffff88800879fc80 ffffea00005b8dc0 dead000000000004 [ 31.828770] raw: 0000000000000000 0000000000110011 00000001ffffffff ffff8880095df201 [ 31.829670] page dumped because: kasan: bad access detected [ 31.830324] [ 31.830539] Memory state around the buggy address: [ 31.831128] ffff88800dcd6200: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 fc [ 31.831973] ffff88800dcd6280: fc fc fc fc fc fc fc fa fb fb fb fb fb fb fb fb [ 31.832833] >ffff88800dcd6300: fb fb fb fb fb fb fb fb fb fb fb fb fc fc fc fc [ 31.833701] ^ [ 31.834177] ffff88800dcd6380: fc fc fc fc 00 00 00 00 00 00 00 00 00 00 00 00 [ 31.835048] ffff88800dcd6400: 00 00 00 00 00 00 00 00 00 fc fc fc fc fc fc fc [ 31.835899] ================================================================== [ 31.836805] Disabling lock debugging due to kernel taint [ 33.495684] BUG: Bad rss-counter state mm:00000000c328fd58 type:MM_FILEPAGES val:33 [ 33.496823] BUG: Bad rss-counter state mm:00000000c328fd58 type:MM_ANONPAGES val:22 [ 33.925126] BUG: Bad rss-counter state mm:00000000275adf1f type:MM_FILEPAGES val:33 [ 33.926294] BUG: Bad rss-counter state mm:00000000275adf1f type:MM_ANONPAGES val:22 Warning: Permanently added '[localhost]:60356' (ECDSA) to the list of known hosts. 2023/06/20 02:51:18 fuzzer started 2023/06/20 02:51:18 dialing manager at localhost:44161 2023/06/20 02:51:19 checking machine... 2023/06/20 02:51:19 checking revisions... [ 34.636236] kmemleak: Automatic memory scanning thread ended 2023/06/20 02:51:19 testing simple program... [ 34.679705] cgroup: Unknown subsys name 'net' [ 34.730891] cgroup: Unknown subsys name 'rlimit' executing program executing program executing program VM DIAGNOSIS: 02:51:17 Registers: info registers vcpu 0 RAX=0000000080000100 RBX=ffff88800f14e140 RCX=0000000080000100 RDX=ffff888016691b40 RSI=ffffffff8181f2cc RDI=0000000000000006 RBP=0000000000000000 RSP=ffff88806ce09c88 R8 =0000000000000006 R9 =0000000000000000 R10=0000000000000000 R11=00000000000b6996 R12=1ffff1100d9c1393 R13=ffff88800f14e1a0 R14=ffff88800f14e1e0 R15=0000000000000000 RIP=ffffffff814c07f1 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 00007f8f36bb6900 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=00007ffe2efc7000 CR3=000000000d130000 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=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 info registers vcpu 1 RAX=dffffc0000000000 RBX=ffff88806cf39500 RCX=1ffff1100d9e50c9 RDX=00000000000f4240 RSI=0000000000000004 RDI=ffff88806cf28648 RBP=ffff88806cf28620 RSP=ffff88806cf09d98 R8 =0000000000000000 R9 =ffffed100d9e73ed R10=ffff88806cf39f6b R11=000000167dc8748c R12=ffff88806cf39f68 R13=0000000000000000 R14=0000000000000000 R15=dffffc0000000000 RIP=ffffffff8129a1c9 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 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=00007f61b1effa30 CR3=000000000cb0a000 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=35394e85b2ee8ca9e040b8b103077723 XMM02=2c67c8bc2e329bc3000000000011fbf0 XMM03=fb795ef6d65770560000000000123898 XMM04=df23b1f505a2b04b00000000000ae988 XMM05=751b9502027dc0b900000000001347e0 XMM06=bdf2e299e47b49d50000000000134668 XMM07=e042d86d42eb936e0000000000123b70 XMM08=e8c091c0d8f2c70e000000000011fc50 XMM09=00000000000000000000000000000000 XMM10=00000000000000000000000000000000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000