syzkaller login: [ 31.359206] BUG: Bad rss-counter state mm:000000001cbe0c91 type:MM_FILEPAGES val:33 [ 31.360148] BUG: Bad rss-counter state mm:000000001cbe0c91 type:MM_ANONPAGES val:22 [ 31.555729] ================================================================== [ 31.556727] BUG: KASAN: slab-use-after-free in vma_interval_tree_remove+0xc75/0xec0 [ 31.557736] Read of size 8 at addr ffff88801655d798 by task sshd/222 [ 31.558726] [ 31.558966] CPU: 1 PID: 222 Comm: sshd Not tainted 6.4.0-rc7-next-20230619 #1 [ 31.559880] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS 1.12.0-1 04/01/2014 [ 31.561077] Call Trace: [ 31.561466] [ 31.561800] dump_stack_lvl+0x91/0xf0 [ 31.562379] print_report+0xcc/0x620 [ 31.562962] ? __virt_addr_valid+0x102/0x340 [ 31.563614] ? vma_interval_tree_remove+0xc75/0xec0 [ 31.564349] ? vma_interval_tree_remove+0xc75/0xec0 [ 31.565107] kasan_report+0xbe/0xf0 [ 31.565624] ? vma_interval_tree_remove+0xc75/0xec0 [ 31.566304] vma_interval_tree_remove+0xc75/0xec0 [ 31.566969] vma_prepare+0xc54/0x11a0 [ 31.567490] __split_vma+0x5af/0x950 [ 31.568006] ? __pfx___split_vma+0x10/0x10 [ 31.568579] ? find_held_lock+0x2c/0x110 [ 31.569156] do_vmi_align_munmap+0x2ba/0x11f0 [ 31.569764] ? lock_is_held_type+0x9f/0x120 [ 31.570346] ? __pfx_do_vmi_align_munmap+0x10/0x10 [ 31.571011] ? mtree_range_walk+0x632/0x900 [ 31.571611] ? mas_walk+0x5c7/0x7c0 [ 31.572131] do_vmi_munmap+0x1f1/0x2b0 [ 31.572668] mmap_region+0x1f9/0x2660 [ 31.573206] ? vm_mmap_pgoff+0x15c/0x3a0 [ 31.573764] ? __pfx_arch_get_unmapped_area_topdown+0x10/0x10 [ 31.574537] ? __pfx_lock_acquire+0x10/0x10 [ 31.575126] ? __pfx_mmap_region+0x10/0x10 [ 31.575704] ? security_mmap_addr+0x7d/0xa0 [ 31.576289] ? get_unmapped_area+0x1f5/0x3f0 [ 31.576895] do_mmap+0x854/0xf00 [ 31.577356] vm_mmap_pgoff+0x1a6/0x3a0 [ 31.577879] ? __pfx_vm_mmap_pgoff+0x10/0x10 [ 31.578472] ksys_mmap_pgoff+0x3af/0x500 [ 31.579007] do_syscall_64+0x3f/0x90 [ 31.579513] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 31.580193] RIP: 0033:0x7f5940780d82 [ 31.580676] 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 [ 31.582993] RSP: 002b:00007ffffea3b6e8 EFLAGS: 00000206 ORIG_RAX: 0000000000000009 [ 31.583975] RAX: ffffffffffffffda RBX: 0000000000000812 RCX: 00007f5940780d82 [ 31.584907] RDX: 0000000000000005 RSI: 0000000000001000 RDI: 00007f593fbba000 [ 31.585835] RBP: 00007f593fbba000 R08: 0000000000000009 R09: 0000000000001000 [ 31.586759] R10: 0000000000000812 R11: 0000000000000206 R12: 0000564d1e49df60 [ 31.587684] R13: 00007ffffea3b700 R14: 00007ffffea3b730 R15: 00007ffffea3ba90 [ 31.588628] [ 31.588965] [ 31.589200] Allocated by task 213: [ 31.589670] kasan_save_stack+0x22/0x50 [ 31.590222] kasan_set_track+0x25/0x30 [ 31.590767] __kasan_slab_alloc+0x59/0x70 [ 31.591341] kmem_cache_alloc+0x16b/0x370 [ 31.591907] vm_area_dup+0x20/0x160 [ 31.592405] __split_vma+0x170/0x950 [ 31.592926] split_vma+0xc6/0x110 [ 31.593409] mprotect_fixup+0x8d2/0xb30 [ 31.593960] do_mprotect_pkey+0x87e/0xd40 [ 31.594523] __x64_sys_mprotect+0x78/0xc0 [ 31.595100] do_syscall_64+0x3f/0x90 [ 31.595620] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 31.596330] [ 31.596567] Freed by task 13: [ 31.596997] kasan_save_stack+0x22/0x50 [ 31.597543] kasan_set_track+0x25/0x30 [ 31.598084] kasan_save_free_info+0x2b/0x50 [ 31.598658] __kasan_slab_free+0x10a/0x190 [ 31.599226] kmem_cache_free+0x10d/0x4d0 [ 31.599830] rcu_core+0x8c8/0x2860 [ 31.600309] __do_softirq+0x1b7/0x7d4 [ 31.600809] [ 31.601051] Last potentially related work creation: [ 31.601679] kasan_save_stack+0x22/0x50 [ 31.602218] __kasan_record_aux_stack+0x8e/0xa0 [ 31.602834] __call_rcu_common.constprop.0+0x6a/0xb90 [ 31.603521] remove_vma+0x139/0x170 [ 31.604001] do_vmi_align_munmap+0xd4a/0x11f0 [ 31.604587] do_vmi_munmap+0x1f1/0x2b0 [ 31.605108] __vm_munmap+0x138/0x3a0 [ 31.605601] __x64_sys_munmap+0x59/0x80 [ 31.606125] do_syscall_64+0x3f/0x90 [ 31.606630] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 31.607312] [ 31.607546] The buggy address belongs to the object at ffff88801655d740 [ 31.607546] which belongs to the cache vm_area_struct of size 168 [ 31.609186] The buggy address is located 88 bytes inside of [ 31.609186] freed 168-byte region [ffff88801655d740, ffff88801655d7e8) [ 31.610720] [ 31.610957] The buggy address belongs to the physical page: [ 31.611677] page:00000000190fe22c refcount:1 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0x1655d [ 31.612879] memcg:ffff88801a6a0d01 [ 31.613347] flags: 0x100000000000200(slab|node=0|zone=1) [ 31.614048] page_type: 0xffffffff() [ 31.614543] raw: 0100000000000200 ffff88800879fc80 dead000000000122 0000000000000000 [ 31.615550] raw: 0000000000000000 0000000000110011 00000001ffffffff ffff88801a6a0d01 [ 31.616546] page dumped because: kasan: bad access detected [ 31.617278] [ 31.617513] Memory state around the buggy address: [ 31.618144] ffff88801655d680: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 [ 31.619073] ffff88801655d700: fc fc fc fc fc fc fc fc fa fb fb fb fb fb fb fb [ 31.620015] >ffff88801655d780: fb fb fb fb fb fb fb fb fb fb fb fb fb fc fc fc [ 31.620952] ^ [ 31.621491] ffff88801655d800: fc fc fc fc fc fa fb fb fb fb fb fb fb fb fb fb [ 31.622429] ffff88801655d880: fb fb fb fb fb fb fb fb fb fb fc fc fc fc fc fc [ 31.623359] ================================================================== [ 31.624396] Disabling lock debugging due to kernel taint [ 34.289815] BUG: Bad rss-counter state mm:000000006e463b0f type:MM_FILEPAGES val:33 [ 34.290628] BUG: Bad rss-counter state mm:000000006e463b0f type:MM_ANONPAGES val:22 [ 34.740822] BUG: Bad rss-counter state mm:0000000035c9f0cb type:MM_FILEPAGES val:33 [ 34.742812] BUG: Bad rss-counter state mm:0000000035c9f0cb type:MM_ANONPAGES val:22 Warning: Permanently added '[localhost]:12157' (ECDSA) to the list of known hosts. 2023/06/19 20:22:59 fuzzer started 2023/06/19 20:22:59 dialing manager at localhost:44161 2023/06/19 20:22:59 checking machine... 2023/06/19 20:22:59 checking revisions... [ 35.462444] kmemleak: Automatic memory scanning thread ended 2023/06/19 20:22:59 testing simple program... [ 35.514482] cgroup: Unknown subsys name 'net' [ 35.558495] cgroup: Unknown subsys name 'rlimit' executing program executing program executing program VM DIAGNOSIS: 20:22:58 Registers: info registers vcpu 0 RAX=0000000000000000 RBX=1ffff11002cf0f5b RCX=ffffffff812d869a RDX=0000000000000000 RSI=0000000000000008 RDI=ffffffff85d3bed0 RBP=0000000000000000 RSP=ffff888016787ad8 R8 =0000000000000000 R9 =fffffbfff0ba77da R10=ffffffff85d3bed7 R11=00000000000b6996 R12=ffff88801918b180 R13=0000000000000cc0 R14=0000000000000cc0 R15=0000000000000cc0 RIP=ffffffff844f8a4a RFL=00000286 [--S--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 00007fa42de69900 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=00007fa42e41e650 CR3=000000000fea0000 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=000000000000000000000000000000ff XMM02=000000000000000000000000000000ff XMM03=5320444f4854454d5f54505952434e45 XMM04=40404040404040404040404040404040 XMM05=5a5a5a5a5a5a5a5a5a5a5a5a5a5a5a5a XMM06=20202020202020202020202020202020 XMM07=00000000000000000000000000000000 XMM08=ffbc64ffffbc44ffffbc34ffffbc9f00 XMM09=00000000000000000000000000000000 XMM10=00000000000000000000000000000000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000 info registers vcpu 1 RAX=ffff88806cf35000 RBX=0000000000000001 RCX=ffffffff8450c50e RDX=ffffed100d9e6a01 RSI=0000000000000004 RDI=ffffffff812889a5 RBP=dffffc0000000000 RSP=ffff888008e27e70 R8 =0000000000000000 R9 =ffffed100d9e6a00 R10=ffff88806cf35003 R11=ffff888008c58400 R12=ffffffff85d3bed0 R13=1ffff110011c4fd3 R14=0000000000000000 R15=0000000000000000 RIP=ffffffff8450d49f 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 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=00007f2940d122b0 CR3=000000000cbde000 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=cac736c013679f9f5a4762648398f914 XMM02=000000000011cd98d59e07bde36eea69 XMM03=000000000011cec0ec2efd57dc4c00df XMM04=63cb7967da00a94300000000000ae988 XMM05=277b94cdab950ab10000000000134fb0 XMM06=4fda316b135da52b0000000000133da0 XMM07=fb795ef6d65770560000000000124058 XMM08=2c67c8bc2e329bc3000000000011cec0 XMM09=00000000000000000000000000000000 XMM10=00000000000000000000000000000000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000