syzkaller login: [ 36.842022] BUG: Bad rss-counter state mm:00000000d9e92e96 type:MM_FILEPAGES val:33 [ 36.843035] BUG: Bad rss-counter state mm:00000000d9e92e96 type:MM_ANONPAGES val:22 [ 37.005864] ================================================================== [ 37.006952] BUG: KASAN: slab-use-after-free in vma_interval_tree_remove+0xc75/0xec0 [ 37.008079] Read of size 8 at addr ffff88800e02dd08 by task sshd/220 [ 37.009140] [ 37.009360] CPU: 1 PID: 220 Comm: sshd Not tainted 6.4.0-rc7-next-20230619 #1 [ 37.010241] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS 1.12.0-1 04/01/2014 [ 37.011256] Call Trace: [ 37.011575] [ 37.011866] dump_stack_lvl+0x91/0xf0 [ 37.012402] print_report+0xcc/0x620 [ 37.012917] ? __virt_addr_valid+0x102/0x340 [ 37.013508] ? vma_interval_tree_remove+0xc75/0xec0 [ 37.014147] ? vma_interval_tree_remove+0xc75/0xec0 [ 37.014764] kasan_report+0xbe/0xf0 [ 37.015255] ? vma_interval_tree_remove+0xc75/0xec0 [ 37.015873] vma_interval_tree_remove+0xc75/0xec0 [ 37.016511] vma_prepare+0xc54/0x11a0 [ 37.017030] __split_vma+0x5af/0x950 [ 37.017505] ? __pfx___split_vma+0x10/0x10 [ 37.018056] ? find_held_lock+0x2c/0x110 [ 37.018575] do_vmi_align_munmap+0x2ba/0x11f0 [ 37.019147] ? lock_is_held_type+0x9f/0x120 [ 37.019682] ? __pfx_do_vmi_align_munmap+0x10/0x10 [ 37.020343] ? mtree_range_walk+0x632/0x900 [ 37.020902] ? mas_walk+0x5c7/0x7c0 [ 37.021402] do_vmi_munmap+0x1f1/0x2b0 [ 37.021892] mmap_region+0x1f9/0x2660 [ 37.022383] ? vm_mmap_pgoff+0x15c/0x3a0 [ 37.022907] ? __pfx_arch_get_unmapped_area_topdown+0x10/0x10 [ 37.023640] ? __pfx_lock_acquire+0x10/0x10 [ 37.024197] ? __pfx_mmap_region+0x10/0x10 [ 37.024742] ? security_mmap_addr+0x7d/0xa0 [ 37.025300] ? get_unmapped_area+0x1f5/0x3f0 [ 37.025850] do_mmap+0x854/0xf00 [ 37.026305] vm_mmap_pgoff+0x1a6/0x3a0 [ 37.026802] ? __pfx_vm_mmap_pgoff+0x10/0x10 [ 37.027377] ksys_mmap_pgoff+0x3af/0x500 [ 37.027899] do_syscall_64+0x3f/0x90 [ 37.028415] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 37.029089] RIP: 0033:0x7fc34aa74d82 [ 37.029546] 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 [ 37.031712] RSP: 002b:00007fff7920af78 EFLAGS: 00000206 ORIG_RAX: 0000000000000009 [ 37.032661] RAX: ffffffffffffffda RBX: 0000000000000812 RCX: 00007fc34aa74d82 [ 37.033539] RDX: 0000000000000005 RSI: 0000000000001000 RDI: 00007fc349eae000 [ 37.034397] RBP: 00007fc349eae000 R08: 0000000000000009 R09: 0000000000001000 [ 37.035253] R10: 0000000000000812 R11: 0000000000000206 R12: 000055c979bf1f70 [ 37.036120] R13: 00007fff7920af90 R14: 00007fff7920afc0 R15: 00007fff7920b320 [ 37.037037] [ 37.037330] [ 37.037545] Allocated by task 213: [ 37.037987] kasan_save_stack+0x22/0x50 [ 37.038490] kasan_set_track+0x25/0x30 [ 37.038998] __kasan_slab_alloc+0x59/0x70 [ 37.039523] kmem_cache_alloc+0x16b/0x370 [ 37.040061] vm_area_dup+0x20/0x160 [ 37.040541] __split_vma+0x170/0x950 [ 37.041033] split_vma+0xc6/0x110 [ 37.041475] mprotect_fixup+0x8d2/0xb30 [ 37.041997] do_mprotect_pkey+0x87e/0xd40 [ 37.042516] __x64_sys_mprotect+0x78/0xc0 [ 37.043050] do_syscall_64+0x3f/0x90 [ 37.043520] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 37.044192] [ 37.044417] Freed by task 213: [ 37.044812] kasan_save_stack+0x22/0x50 [ 37.045344] kasan_set_track+0x25/0x30 [ 37.045839] kasan_save_free_info+0x2b/0x50 [ 37.046385] __kasan_slab_free+0x10a/0x190 [ 37.046925] kmem_cache_free+0x10d/0x4d0 [ 37.047437] rcu_core+0x8c8/0x2860 [ 37.047884] __do_softirq+0x1b7/0x7d4 [ 37.048401] [ 37.048616] Last potentially related work creation: [ 37.049227] kasan_save_stack+0x22/0x50 [ 37.049810] __kasan_record_aux_stack+0x8e/0xa0 [ 37.050406] __call_rcu_common.constprop.0+0x6a/0xb90 [ 37.051075] remove_vma+0x139/0x170 [ 37.051527] do_vmi_align_munmap+0xd4a/0x11f0 [ 37.052097] do_vmi_munmap+0x1f1/0x2b0 [ 37.052623] __vm_munmap+0x138/0x3a0 [ 37.053123] __x64_sys_munmap+0x59/0x80 [ 37.053616] do_syscall_64+0x3f/0x90 [ 37.054110] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 37.054750] [ 37.054983] The buggy address belongs to the object at ffff88800e02dcb0 [ 37.054983] which belongs to the cache vm_area_struct of size 168 [ 37.056498] The buggy address is located 88 bytes inside of [ 37.056498] freed 168-byte region [ffff88800e02dcb0, ffff88800e02dd58) [ 37.057935] [ 37.058155] The buggy address belongs to the physical page: [ 37.058815] page:0000000022d07f48 refcount:1 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0xe02d [ 37.059913] memcg:ffff88800fe6dd01 [ 37.060376] flags: 0x100000000000200(slab|node=0|zone=1) [ 37.061057] page_type: 0xffffffff() [ 37.061510] raw: 0100000000000200 ffff88800879fc80 dead000000000122 0000000000000000 [ 37.062438] raw: 0000000000000000 0000000000110011 00000001ffffffff ffff88800fe6dd01 [ 37.063490] page dumped because: kasan: bad access detected [ 37.064406] [ 37.064693] Memory state around the buggy address: [ 37.065474] ffff88800e02dc00: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 fc fc [ 37.066500] ffff88800e02dc80: fc fc fc fc fc fc fa fb fb fb fb fb fb fb fb fb [ 37.067426] >ffff88800e02dd00: fb fb fb fb fb fb fb fb fb fb fb fc fc fc fc fc [ 37.068325] ^ [ 37.068762] ffff88800e02dd80: fc fc fc fa fb fb fb fb fb fb fb fb fb fb fb fb [ 37.069684] ffff88800e02de00: fb fb fb fb fb fb fb fb fc fc fc fc fc fc fc fc [ 37.070543] ================================================================== [ 37.071473] Disabling lock debugging due to kernel taint [ 39.541256] BUG: Bad rss-counter state mm:000000007c7f1a0f type:MM_FILEPAGES val:33 [ 39.542255] BUG: Bad rss-counter state mm:000000007c7f1a0f type:MM_ANONPAGES val:22 [ 40.129940] BUG: Bad rss-counter state mm:00000000df6f35b5 type:MM_FILEPAGES val:33 [ 40.130963] BUG: Bad rss-counter state mm:00000000df6f35b5 type:MM_ANONPAGES val:22 Warning: Permanently added '[localhost]:56975' (ECDSA) to the list of known hosts. 2023/06/20 05:33:45 fuzzer started 2023/06/20 05:33:45 dialing manager at localhost:44161 2023/06/20 05:33:45 checking machine... 2023/06/20 05:33:45 checking revisions... [ 40.786737] kmemleak: Automatic memory scanning thread ended 2023/06/20 05:33:45 testing simple program... [ 40.830455] cgroup: Unknown subsys name 'net' [ 40.875639] cgroup: Unknown subsys name 'rlimit' executing program executing program executing program VM DIAGNOSIS: 05:33:39 Registers: info registers vcpu 0 RAX=ffff88806ce35000 RBX=0000000000000000 RCX=ffffffff8450c50e RDX=ffffed100d9c6a01 RSI=0000000000000004 RDI=ffffffff812889a5 RBP=dffffc0000000000 RSP=ffffffff85407e10 R8 =0000000000000000 R9 =ffffed100d9c6a00 R10=ffff88806ce35003 R11=0000000000000001 R12=ffffffff85d3bed0 R13=1ffffffff0a80fc7 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 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=00007ffc3b1d3648 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=00007f10b01e251000005590ae342790 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=ffff888016618001 RBX=0000000000000001 RCX=0000000000000001 RDX=ffff888016617601 RSI=ffff888016617640 RDI=ffff888016617658 RBP=ffff888016617640 RSP=ffff888016617560 R8 =ffffffff8609675a R9 =0000000000000000 R10=0000000000038001 R11=0000000000006097 R12=0000000000000008 R13=ffff888016610000 R14=ffff888016617648 R15=ffff888016617648 RIP=ffffffff811304ce RFL=00000282 [--S----] 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 00007fe2f5ed1900 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=00007fe2f64890b0 CR3=000000000ec98000 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=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