syzkaller login: [ 29.832024] BUG: Bad rss-counter state mm:0000000013c89fb6 type:MM_FILEPAGES val:33 [ 29.833657] BUG: Bad rss-counter state mm:0000000013c89fb6 type:MM_ANONPAGES val:22 [ 29.997510] ================================================================== [ 29.998429] BUG: KASAN: slab-use-after-free in vma_interval_tree_remove+0xc75/0xec0 [ 29.999570] Read of size 8 at addr ffff88800984c968 by task sshd/221 [ 30.000396] [ 30.000614] CPU: 1 PID: 221 Comm: sshd Not tainted 6.4.0-rc7-next-20230620 #1 [ 30.001471] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS 1.12.0-1 04/01/2014 [ 30.002471] Call Trace: [ 30.002788] [ 30.003070] dump_stack_lvl+0x91/0xf0 [ 30.003556] print_report+0xcc/0x620 [ 30.004047] ? __virt_addr_valid+0x102/0x340 [ 30.004594] ? vma_interval_tree_remove+0xc75/0xec0 [ 30.005213] ? vma_interval_tree_remove+0xc75/0xec0 [ 30.005822] kasan_report+0xbe/0xf0 [ 30.006296] ? vma_interval_tree_remove+0xc75/0xec0 [ 30.006923] vma_interval_tree_remove+0xc75/0xec0 [ 30.007529] vma_prepare+0xc54/0x11a0 [ 30.008010] __split_vma+0x5af/0x950 [ 30.008489] ? __pfx___split_vma+0x10/0x10 [ 30.009013] ? find_held_lock+0x2c/0x110 [ 30.009527] do_vmi_align_munmap+0x2ba/0x11f0 [ 30.010092] ? lock_is_held_type+0x9f/0x120 [ 30.010636] ? __pfx_do_vmi_align_munmap+0x10/0x10 [ 30.011235] ? mtree_range_walk+0x632/0x900 [ 30.011815] ? mas_walk+0x5c7/0x7c0 [ 30.012294] do_vmi_munmap+0x1f1/0x2b0 [ 30.012786] mmap_region+0x1f9/0x2660 [ 30.013263] ? vm_mmap_pgoff+0x15c/0x3a0 [ 30.013776] ? __pfx_arch_get_unmapped_area_topdown+0x10/0x10 [ 30.014487] ? __pfx_lock_acquire+0x10/0x10 [ 30.015019] ? __pfx_mmap_region+0x10/0x10 [ 30.015555] ? security_mmap_addr+0x7d/0xa0 [ 30.016103] ? get_unmapped_area+0x1f5/0x3f0 [ 30.016653] do_mmap+0x854/0xf00 [ 30.017093] vm_mmap_pgoff+0x1a6/0x3a0 [ 30.017592] ? __pfx_vm_mmap_pgoff+0x10/0x10 [ 30.018156] ksys_mmap_pgoff+0x3af/0x500 [ 30.018665] do_syscall_64+0x3f/0x90 [ 30.019148] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 30.019806] RIP: 0033:0x7f3065908d82 [ 30.020267] 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 [ 30.022403] RSP: 002b:00007ffc8f2a2838 EFLAGS: 00000206 ORIG_RAX: 0000000000000009 [ 30.023316] RAX: ffffffffffffffda RBX: 0000000000000812 RCX: 00007f3065908d82 [ 30.024189] RDX: 0000000000000005 RSI: 0000000000001000 RDI: 00007f3064d42000 [ 30.025031] RBP: 00007f3064d42000 R08: 0000000000000009 R09: 0000000000001000 [ 30.025884] R10: 0000000000000812 R11: 0000000000000206 R12: 0000560203b8bd90 [ 30.026733] R13: 00007ffc8f2a2850 R14: 00007ffc8f2a2880 R15: 00007ffc8f2a2be0 [ 30.027591] [ 30.027892] [ 30.028107] Allocated by task 214: [ 30.028538] kasan_save_stack+0x22/0x50 [ 30.029046] kasan_set_track+0x25/0x30 [ 30.029539] __kasan_slab_alloc+0x59/0x70 [ 30.030070] kmem_cache_alloc+0x16b/0x370 [ 30.030596] vm_area_dup+0x20/0x160 [ 30.031055] __split_vma+0x170/0x950 [ 30.031527] split_vma+0xc6/0x110 [ 30.031986] mprotect_fixup+0x8d2/0xb30 [ 30.032491] do_mprotect_pkey+0x87e/0xd40 [ 30.033017] __x64_sys_mprotect+0x78/0xc0 [ 30.033554] do_syscall_64+0x3f/0x90 [ 30.034036] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 30.034673] [ 30.034889] Freed by task 214: [ 30.035277] kasan_save_stack+0x22/0x50 [ 30.035777] kasan_set_track+0x25/0x30 [ 30.036279] kasan_save_free_info+0x2b/0x50 [ 30.036814] __kasan_slab_free+0x10a/0x190 [ 30.037354] kmem_cache_free+0x10d/0x4d0 [ 30.037863] rcu_core+0x8c8/0x2860 [ 30.038308] __do_softirq+0x1b7/0x7d4 [ 30.038790] [ 30.039009] Last potentially related work creation: [ 30.039609] kasan_save_stack+0x22/0x50 [ 30.040116] __kasan_record_aux_stack+0x8e/0xa0 [ 30.040691] __call_rcu_common.constprop.0+0x6a/0xb90 [ 30.041338] remove_vma+0x139/0x170 [ 30.041786] do_vmi_align_munmap+0xd4a/0x11f0 [ 30.042343] do_vmi_munmap+0x1f1/0x2b0 [ 30.042838] __vm_munmap+0x138/0x3a0 [ 30.043306] __x64_sys_munmap+0x59/0x80 [ 30.043821] do_syscall_64+0x3f/0x90 [ 30.044301] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 30.044947] [ 30.045162] Second to last potentially related work creation: [ 30.045851] kasan_save_stack+0x22/0x50 [ 30.046351] __kasan_record_aux_stack+0x8e/0xa0 [ 30.046925] __call_rcu_common.constprop.0+0x6a/0xb90 [ 30.047563] remove_vma+0x139/0x170 [ 30.048022] do_vmi_align_munmap+0xd4a/0x11f0 [ 30.048581] do_vmi_munmap+0x1f1/0x2b0 [ 30.049067] mmap_region+0x1f9/0x2660 [ 30.049544] do_mmap+0x854/0xf00 [ 30.049977] vm_mmap_pgoff+0x1a6/0x3a0 [ 30.050465] ksys_mmap_pgoff+0x3af/0x500 [ 30.050967] do_syscall_64+0x3f/0x90 [ 30.051439] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 30.052109] [ 30.052328] The buggy address belongs to the object at ffff88800984c910 [ 30.052328] which belongs to the cache vm_area_struct of size 168 [ 30.053807] The buggy address is located 88 bytes inside of [ 30.053807] freed 168-byte region [ffff88800984c910, ffff88800984c9b8) [ 30.055216] [ 30.055433] The buggy address belongs to the physical page: [ 30.056101] page:00000000c9beb368 refcount:1 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0x984c [ 30.057205] memcg:ffff88800ddf6f01 [ 30.057632] flags: 0x100000000000200(slab|node=0|zone=1) [ 30.058278] page_type: 0xffffffff() [ 30.058726] raw: 0100000000000200 ffff8880087a0c80 ffffea00005a5980 dead000000000006 [ 30.059649] raw: 0000000000000000 0000000000110011 00000001ffffffff ffff88800ddf6f01 [ 30.060568] page dumped because: kasan: bad access detected [ 30.061227] [ 30.061441] Memory state around the buggy address: [ 30.062054] ffff88800984c800: fc fc fc fc fc fa fb fb fb fb fb fb fb fb fb fb [ 30.063032] ffff88800984c880: fb fb fb fb fb fb fb fb fb fb fc fc fc fc fc fc [ 30.064025] >ffff88800984c900: fc fc fa fb fb fb fb fb fb fb fb fb fb fb fb fb [ 30.065002] ^ [ 30.065898] ffff88800984c980: fb fb fb fb fb fb fb fc fc fc fc fc fc fc fc fa [ 30.066885] ffff88800984ca00: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb [ 30.067888] ================================================================== [ 30.069249] Disabling lock debugging due to kernel taint [ 32.078314] BUG: Bad rss-counter state mm:00000000f30e931b type:MM_FILEPAGES val:33 [ 32.079301] BUG: Bad rss-counter state mm:00000000f30e931b type:MM_ANONPAGES val:22 [ 32.642761] BUG: Bad rss-counter state mm:000000000e8720f0 type:MM_FILEPAGES val:33 [ 32.643935] BUG: Bad rss-counter state mm:000000000e8720f0 type:MM_ANONPAGES val:22 Warning: Permanently added '[localhost]:34454' (ECDSA) to the list of known hosts. 2023/06/20 14:06:12 fuzzer started 2023/06/20 14:06:12 dialing manager at localhost:36067 2023/06/20 14:06:12 checking machine... 2023/06/20 14:06:12 checking revisions... [ 33.290003] kmemleak: Automatic memory scanning thread ended 2023/06/20 14:06:12 testing simple program... [ 33.333841] cgroup: Unknown subsys name 'net' [ 33.387879] cgroup: Unknown subsys name 'rlimit' executing program executing program executing program VM DIAGNOSIS: 14:06:12 Registers: info registers vcpu 0 RAX=0000000000000000 RBX=0000002200080000 RCX=ffffffff81b3a97a RDX=ffff888017ad3680 RSI=0000000000000000 RDI=0000000000000005 RBP=ffff888015ee02b0 RSP=ffff88801797fd10 R8 =0000000000000005 R9 =0000000000000000 R10=0000000000000000 R11=0000000000000001 R12=ffff88801797fe18 R13=ffffffff856f0da0 R14=0000000000000000 R15=00000000000007ff RIP=ffffffff814c0864 RFL=00000246 [---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 00007f48a2604900 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=00007f48a2bbc0b0 CR3=000000001ca4e000 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=2c2c2c2c2c2c2c2c2c2c2c2c2c2c2c2c XMM01=00000000000000000000000000ff0000 XMM02=00000000000000000000000000ff0000 XMM03=5320444f4854454d5f54505952434e45 XMM04=40404040404040404040404040404040 XMM05=5a5a5a5a5a5a5a5a5a5a5a5a5a5a5a5a XMM06=20202020202020202020202020202020 XMM07=00000000000000000000000000000000 XMM08=6c6f636f746f72702f6374652f006563 XMM09=00000000000000000000000000000000 XMM10=00000000000000000000000000000000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000 info registers vcpu 1 RAX=dffffc0000000000 RBX=ffff88806cf09ba8 RCX=ffffffff860d8256 RDX=1ffff1100d9e134f RSI=0000000000000000 RDI=ffff88806cf09a78 RBP=ffff88806cf09ac8 RSP=ffff88806cf09a00 R8 =ffffffff860d825a R9 =ffff88806cf09ab0 R10=0000000000038001 R11=0000000000010b8d R12=ffff88806cf09ad0 R13=ffff88806cf09ab8 R14=ffff88806cf09ba8 R15=ffff88806cf09a70 RIP=ffffffff81131c83 RFL=00000246 [---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=00007f3654c3bd30 CR3=000000000c7c2000 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=a849ca375838d2b60049d3275ddcbe8e XMM02=2c67c8bc2e329bc30000000000119df8 XMM03=fb795ef6d65770560000000000120fc8 XMM04=0cec8d4017f3bb8b00000000000ae988 XMM05=e4cb8bb95a7664b60000000000132468 XMM06=8702ed54c438141500000000001312d0 XMM07=e042d86d42eb936e0000000000121248 XMM08=f354eba69f5a25400000000000119e58 XMM09=00000000000000000000000000000000 XMM10=20200000000020202020202020200000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000