syzkaller login: [ 38.483968] BUG: Bad rss-counter state mm:00000000d2af76cc type:MM_FILEPAGES val:33 [ 38.484683] BUG: Bad rss-counter state mm:00000000d2af76cc type:MM_ANONPAGES val:22 [ 38.657086] ================================================================== [ 38.657837] BUG: KASAN: slab-use-after-free in vma_interval_tree_remove+0xc75/0xec0 [ 38.658478] Read of size 8 at addr ffff88800d97f968 by task sshd/219 [ 38.658995] [ 38.659148] CPU: 0 PID: 219 Comm: sshd Not tainted 6.4.0-rc7-next-20230620 #1 [ 38.659726] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS 1.12.0-1 04/01/2014 [ 38.660382] Call Trace: [ 38.660605] [ 38.660804] dump_stack_lvl+0x91/0xf0 [ 38.661144] print_report+0xcc/0x620 [ 38.661508] ? __virt_addr_valid+0x102/0x340 [ 38.661863] ? vma_interval_tree_remove+0xc75/0xec0 [ 38.662277] ? vma_interval_tree_remove+0xc75/0xec0 [ 38.662702] kasan_report+0xbe/0xf0 [ 38.663035] ? vma_interval_tree_remove+0xc75/0xec0 [ 38.663463] vma_interval_tree_remove+0xc75/0xec0 [ 38.663879] vma_prepare+0xc54/0x11a0 [ 38.664211] __split_vma+0x5af/0x950 [ 38.664542] ? __pfx___split_vma+0x10/0x10 [ 38.664907] ? find_held_lock+0x2c/0x110 [ 38.665908] do_vmi_align_munmap+0x2ba/0x11f0 [ 38.666372] ? lock_is_held_type+0x9f/0x120 [ 38.666757] ? __pfx_do_vmi_align_munmap+0x10/0x10 [ 38.667223] ? mtree_range_walk+0x632/0x900 [ 38.667607] ? mas_walk+0x5c7/0x7c0 [ 38.667937] do_vmi_munmap+0x1f1/0x2b0 [ 38.668342] mmap_region+0x1f9/0x2660 [ 38.668715] ? vm_mmap_pgoff+0x15c/0x3a0 [ 38.669159] ? __pfx_arch_get_unmapped_area_topdown+0x10/0x10 [ 38.669740] ? __pfx_lock_acquire+0x10/0x10 [ 38.670162] ? __pfx_mmap_region+0x10/0x10 [ 38.670524] ? security_mmap_addr+0x7d/0xa0 [ 38.670890] ? get_unmapped_area+0x1f5/0x3f0 [ 38.671315] do_mmap+0x854/0xf00 [ 38.671620] vm_mmap_pgoff+0x1a6/0x3a0 [ 38.671963] ? __pfx_vm_mmap_pgoff+0x10/0x10 [ 38.672408] ksys_mmap_pgoff+0x3af/0x500 [ 38.672756] do_syscall_64+0x3f/0x90 [ 38.673178] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 38.673674] RIP: 0033:0x7f07c1322d82 [ 38.673990] 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 [ 38.675511] RSP: 002b:00007ffcedc2f8c8 EFLAGS: 00000206 ORIG_RAX: 0000000000000009 [ 38.676174] RAX: ffffffffffffffda RBX: 0000000000000812 RCX: 00007f07c1322d82 [ 38.676767] RDX: 0000000000000005 RSI: 0000000000001000 RDI: 00007f07c075c000 [ 38.677491] RBP: 00007f07c075c000 R08: 0000000000000009 R09: 0000000000001000 [ 38.678116] R10: 0000000000000812 R11: 0000000000000206 R12: 000055f7867f5d90 [ 38.678687] R13: 00007ffcedc2f8e0 R14: 00007ffcedc2f910 R15: 00007ffcedc2fc70 [ 38.679321] [ 38.679522] [ 38.679670] Allocated by task 212: [ 38.679960] kasan_save_stack+0x22/0x50 [ 38.680361] kasan_set_track+0x25/0x30 [ 38.680701] __kasan_slab_alloc+0x59/0x70 [ 38.681151] kmem_cache_alloc+0x16b/0x370 [ 38.681541] vm_area_dup+0x20/0x160 [ 38.681853] __split_vma+0x170/0x950 [ 38.682230] split_vma+0xc6/0x110 [ 38.682537] mprotect_fixup+0x8d2/0xb30 [ 38.682883] do_mprotect_pkey+0x87e/0xd40 [ 38.683302] __x64_sys_mprotect+0x78/0xc0 [ 38.683671] do_syscall_64+0x3f/0x90 [ 38.684003] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 38.684500] [ 38.684651] Freed by task 212: [ 38.684919] kasan_save_stack+0x22/0x50 [ 38.685384] kasan_set_track+0x25/0x30 [ 38.685720] kasan_save_free_info+0x2b/0x50 [ 38.686137] __kasan_slab_free+0x10a/0x190 [ 38.686502] kmem_cache_free+0x10d/0x4d0 [ 38.686850] rcu_core+0x8c8/0x2860 [ 38.687208] __do_softirq+0x1b7/0x7d4 [ 38.687544] [ 38.687694] Last potentially related work creation: [ 38.688140] kasan_save_stack+0x22/0x50 [ 38.688487] __kasan_record_aux_stack+0x8e/0xa0 [ 38.688875] __call_rcu_common.constprop.0+0x6a/0xb90 [ 38.689430] remove_vma+0x139/0x170 [ 38.689739] do_vmi_align_munmap+0xd4a/0x11f0 [ 38.690173] do_vmi_munmap+0x1f1/0x2b0 [ 38.690507] __vm_munmap+0x138/0x3a0 [ 38.690829] __x64_sys_munmap+0x59/0x80 [ 38.691211] do_syscall_64+0x3f/0x90 [ 38.691522] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 38.692129] [ 38.692279] The buggy address belongs to the object at ffff88800d97f910 [ 38.692279] which belongs to the cache vm_area_struct of size 168 [ 38.693377] The buggy address is located 88 bytes inside of [ 38.693377] freed 168-byte region [ffff88800d97f910, ffff88800d97f9b8) [ 38.694367] [ 38.694520] The buggy address belongs to the physical page: [ 38.694966] page:0000000065269733 refcount:1 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0xd97f [ 38.695747] memcg:ffff888014591801 [ 38.696083] flags: 0x100000000000200(slab|node=0|zone=1) [ 38.696526] page_type: 0xffffffff() [ 38.696834] raw: 0100000000000200 ffff8880087a0c80 dead000000000100 dead000000000122 [ 38.697569] raw: 0000000000000000 0000000000110011 00000001ffffffff ffff888014591801 [ 38.698228] page dumped because: kasan: bad access detected [ 38.698673] [ 38.698823] Memory state around the buggy address: [ 38.699265] ffff88800d97f800: fc fc fc fc fc fa fb fb fb fb fb fb fb fb fb fb [ 38.699841] ffff88800d97f880: fb fb fb fb fb fb fb fb fb fb fc fc fc fc fc fc [ 38.700472] >ffff88800d97f900: fc fc fa fb fb fb fb fb fb fb fb fb fb fb fb fb [ 38.701142] ^ [ 38.701753] ffff88800d97f980: fb fb fb fb fb fb fb fc fc fc fc fc fc fc fc 00 [ 38.702395] ffff88800d97fa00: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 [ 38.702989] ================================================================== [ 38.714852] Disabling lock debugging due to kernel taint [ 42.346455] BUG: Bad rss-counter state mm:00000000b34e994a type:MM_FILEPAGES val:33 [ 42.349367] BUG: Bad rss-counter state mm:00000000b34e994a type:MM_ANONPAGES val:22 [ 43.480705] BUG: Bad rss-counter state mm:00000000b8a40dbd type:MM_FILEPAGES val:33 [ 43.481424] BUG: Bad rss-counter state mm:00000000b8a40dbd type:MM_ANONPAGES val:22 Warning: Permanently added '[localhost]:15654' (ECDSA) to the list of known hosts. 2023/06/21 08:04:32 fuzzer started 2023/06/21 08:04:32 dialing manager at localhost:36067 2023/06/21 08:04:32 checking machine... 2023/06/21 08:04:32 checking revisions... [ 44.497392] kmemleak: Automatic memory scanning thread ended 2023/06/21 08:04:33 testing simple program... [ 44.561823] cgroup: Unknown subsys name 'net' [ 44.641880] cgroup: Unknown subsys name 'rlimit' executing program executing program executing program VM DIAGNOSIS: 08:04:32 Registers: info registers vcpu 0 RAX=0000000000000000 RBX=0000000000000001 RCX=ffffffff8453684b RDX=fffffbfff0adb095 RSI=0000000000000004 RDI=ffffffff856d84a0 RBP=ffffffff856d84a0 RSP=ffff88806ce08e90 R8 =0000000000000000 R9 =fffffbfff0adb094 R10=ffffffff856d84a3 R11=000000000008ce22 R12=0000000000000003 R13=fffffbfff0adb094 R14=0000000000000001 R15=1ffff1100d9c11d3 RIP=ffffffff845368c8 RFL=00000002 [-------] 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 00007f357e6c4900 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=00007f357db0abb0 CR3=000000000ca28000 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=d055a1c687c5dea6f149b3164a3fdf49 XMM02=000000000011b990d59e07bde36eea69 XMM03=000000000011bab8ec2efd57dc4c00df XMM04=719fa7c594e5d96000000000000ae988 XMM05=12191d436a2bf4680000000000133b10 XMM06=a1fead30efb46d570000000000132470 XMM07=fb795ef6d65770560000000000121c88 XMM08=2c67c8bc2e329bc3000000000011bab8 XMM09=00000000000000000000000000000000 XMM10=20200000000020202020202020200000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000 info registers vcpu 1 RAX=0000000000000000 RBX=0000000000000001 RCX=ffffffff8453684b RDX=ffffed1003141b89 RSI=0000000000000004 RDI=ffff888018a0dc40 RBP=ffff888018a0dc40 RSP=ffff888016a67580 R8 =0000000000000000 R9 =ffffed1003141b88 R10=ffff888018a0dc43 R11=0000000000000000 R12=0000000000000003 R13=ffffed1003141b88 R14=0000000000000001 R15=1ffff11002d4ceb1 RIP=ffffffff845368c8 RFL=00000002 [-------] 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 00007fcb3f795900 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=00007f1bde8a4328 CR3=00000000165c8000 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=2031333a34303a3830203132206e754a XMM01=5d3432343138342e33342020205b203a XMM02=415f4d4d3a6570797420646264303461 XMM03=617473207265746e756f632d73737220 XMM04=69662068637573206f4e203a656c6163 XMM05=3a656c696620766e65206e65706f206f XMM06=65733a6468737328766e655f6d617020 XMM07=6b7a79732031333a34303a3830203132 XMM08=3d656e696c646d632022656369767265 XMM09=00000000000000000000000000000000 XMM10=00000000000000000000000000000000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000