syzkaller login: [ 38.977417] BUG: Bad rss-counter state mm:00000000812e2ffe type:MM_FILEPAGES val:33 [ 38.978625] BUG: Bad rss-counter state mm:00000000812e2ffe type:MM_ANONPAGES val:22 [ 39.020904] ================================================================== [ 39.022154] BUG: KASAN: slab-use-after-free in vma_interval_tree_remove+0xc75/0xec0 [ 39.023496] Read of size 8 at addr ffff8880101a2058 by task sshd/221 [ 39.024357] [ 39.024579] CPU: 1 PID: 221 Comm: sshd Not tainted 6.4.0-rc7-next-20230620 #1 [ 39.025540] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS 1.12.0-1 04/01/2014 [ 39.026671] Call Trace: [ 39.027062] <TASK> [ 39.027349] dump_stack_lvl+0x91/0xf0 [ 39.027918] print_report+0xcc/0x620 [ 39.028469] ? __virt_addr_valid+0x102/0x340 [ 39.029082] ? vma_interval_tree_remove+0xc75/0xec0 [ 39.029752] ? vma_interval_tree_remove+0xc75/0xec0 [ 39.030417] kasan_report+0xbe/0xf0 [ 39.030889] ? vma_interval_tree_remove+0xc75/0xec0 [ 39.031644] vma_interval_tree_remove+0xc75/0xec0 [ 39.032259] vma_prepare+0xc54/0x11a0 [ 39.032737] __split_vma+0x5af/0x950 [ 39.033203] ? __pfx___split_vma+0x10/0x10 [ 39.033721] ? find_held_lock+0x2c/0x110 [ 39.034248] do_vmi_align_munmap+0x2ba/0x11f0 [ 39.034804] ? lock_is_held_type+0x9f/0x120 [ 39.035339] ? __pfx_do_vmi_align_munmap+0x10/0x10 [ 39.035950] ? mtree_range_walk+0x632/0x900 [ 39.036495] ? mas_walk+0x5c7/0x7c0 [ 39.036964] do_vmi_munmap+0x1f1/0x2b0 [ 39.037457] mmap_region+0x1f9/0x2660 [ 39.037933] ? vm_mmap_pgoff+0x15c/0x3a0 [ 39.038445] ? __pfx_arch_get_unmapped_area_topdown+0x10/0x10 [ 39.039146] ? __pfx_lock_acquire+0x10/0x10 [ 39.039675] ? __pfx_mmap_region+0x10/0x10 [ 39.040210] ? security_mmap_addr+0x7d/0xa0 [ 39.040736] ? get_unmapped_area+0x1f5/0x3f0 [ 39.041282] do_mmap+0x854/0xf00 [ 39.041716] vm_mmap_pgoff+0x1a6/0x3a0 [ 39.042223] ? __pfx_vm_mmap_pgoff+0x10/0x10 [ 39.042791] ksys_mmap_pgoff+0x3af/0x500 [ 39.043301] do_syscall_64+0x3f/0x90 [ 39.043779] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 39.044422] RIP: 0033:0x7f7873680d82 [ 39.044871] 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 [ 39.046981] RSP: 002b:00007ffc3e004298 EFLAGS: 00000206 ORIG_RAX: 0000000000000009 [ 39.047871] RAX: ffffffffffffffda RBX: 0000000000000812 RCX: 00007f7873680d82 [ 39.048710] RDX: 0000000000000005 RSI: 0000000000001000 RDI: 00007f7872aba000 [ 39.049554] RBP: 00007f7872aba000 R08: 0000000000000009 R09: 0000000000001000 [ 39.050402] R10: 0000000000000812 R11: 0000000000000206 R12: 000056152a131d90 [ 39.051242] R13: 00007ffc3e0042b0 R14: 00007ffc3e0042e0 R15: 00007ffc3e004640 [ 39.052089] </TASK> [ 39.052375] [ 39.052587] Allocated by task 213: [ 39.053010] kasan_save_stack+0x22/0x50 [ 39.053511] kasan_set_track+0x25/0x30 [ 39.054000] __kasan_slab_alloc+0x59/0x70 [ 39.054541] kmem_cache_alloc+0x16b/0x370 [ 39.055052] vm_area_dup+0x20/0x160 [ 39.055498] __split_vma+0x170/0x950 [ 39.055960] split_vma+0xc6/0x110 [ 39.056403] mprotect_fixup+0x8d2/0xb30 [ 39.056898] do_mprotect_pkey+0x87e/0xd40 [ 39.057414] __x64_sys_mprotect+0x78/0xc0 [ 39.057926] do_syscall_64+0x3f/0x90 [ 39.058405] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 39.059043] [ 39.059266] Freed by task 213: [ 39.059654] kasan_save_stack+0x22/0x50 [ 39.060146] kasan_set_track+0x25/0x30 [ 39.060637] kasan_save_free_info+0x2b/0x50 [ 39.061164] __kasan_slab_free+0x10a/0x190 [ 39.061775] kmem_cache_free+0x10d/0x4d0 [ 39.062298] rcu_core+0x8c8/0x2860 [ 39.062737] __do_softirq+0x1b7/0x7d4 [ 39.063211] [ 39.063422] Last potentially related work creation: [ 39.064002] kasan_save_stack+0x22/0x50 [ 39.064505] __kasan_record_aux_stack+0x8e/0xa0 [ 39.065069] __call_rcu_common.constprop.0+0x6a/0xb90 [ 39.065704] remove_vma+0x139/0x170 [ 39.066148] do_vmi_align_munmap+0xd4a/0x11f0 [ 39.066713] do_vmi_munmap+0x1f1/0x2b0 [ 39.067192] __vm_munmap+0x138/0x3a0 [ 39.067658] __x64_sys_munmap+0x59/0x80 [ 39.068155] do_syscall_64+0x3f/0x90 [ 39.068624] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 39.069257] [ 39.069471] Second to last potentially related work creation: [ 39.070142] kasan_save_stack+0x22/0x50 [ 39.070647] __kasan_record_aux_stack+0x8e/0xa0 [ 39.071215] __call_rcu_common.constprop.0+0x6a/0xb90 [ 39.071852] remove_vma+0x139/0x170 [ 39.072299] do_vmi_align_munmap+0xd4a/0x11f0 [ 39.072849] do_vmi_munmap+0x1f1/0x2b0 [ 39.073331] move_vma.constprop.0+0x88a/0x1ba0 [ 39.073900] __do_sys_mremap+0xb78/0x1780 [ 39.074436] do_syscall_64+0x3f/0x90 [ 39.074911] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 39.075546] [ 39.075758] The buggy address belongs to the object at ffff8880101a2000 [ 39.075758] which belongs to the cache vm_area_struct of size 168 [ 39.077212] The buggy address is located 88 bytes inside of [ 39.077212] freed 168-byte region [ffff8880101a2000, ffff8880101a20a8) [ 39.078613] [ 39.078829] The buggy address belongs to the physical page: [ 39.079482] page:000000002e7be4d9 refcount:1 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0x101a2 [ 39.080574] memcg:ffff88800d56bc01 [ 39.080992] anon flags: 0x100000000000200(slab|node=0|zone=1) [ 39.081691] page_type: 0xffffffff() [ 39.082145] raw: 0100000000000200 ffff8880087a0c80 ffffea0000387780 dead000000000005 [ 39.083082] raw: 0000000000000000 0000000000110011 00000001ffffffff ffff88800d56bc01 [ 39.083974] page dumped because: kasan: bad access detected [ 39.084627] [ 39.084838] Memory state around the buggy address: [ 39.085411] ffff8880101a1f00: fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc [ 39.086264] ffff8880101a1f80: fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc [ 39.087109] >ffff8880101a2000: fa fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb [ 39.087954] ^ [ 39.088674] ffff8880101a2080: fb fb fb fb fb fc fc fc fc fc fc fc fc fa fb fb [ 39.089516] ffff8880101a2100: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb [ 39.090365] ================================================================== [ 39.091314] Disabling lock debugging due to kernel taint [ 41.504010] BUG: Bad rss-counter state mm:0000000042652cfd type:MM_FILEPAGES val:33 [ 41.505007] BUG: Bad rss-counter state mm:0000000042652cfd type:MM_ANONPAGES val:22 [ 41.559920] BUG: Bad rss-counter state mm:0000000092230fb6 type:MM_FILEPAGES val:167 [ 41.561037] BUG: Bad rss-counter state mm:0000000092230fb6 type:MM_ANONPAGES val:50 [ 41.982544] BUG: Bad rss-counter state mm:00000000b0c0a844 type:MM_FILEPAGES val:33 [ 41.983602] BUG: Bad rss-counter state mm:00000000b0c0a844 type:MM_ANONPAGES val:22 Warning: Permanently added '[localhost]:38182' (ECDSA) to the list of known hosts. 2023/06/20 11:17:02 fuzzer started 2023/06/20 11:17:03 dialing manager at localhost:36067 2023/06/20 11:17:03 checking machine... 2023/06/20 11:17:03 checking revisions... [ 42.702409] kmemleak: Automatic memory scanning thread ended 2023/06/20 11:17:03 testing simple program... [ 42.749428] cgroup: Unknown subsys name 'net' [ 42.809384] cgroup: Unknown subsys name 'rlimit' executing program executing program executing program VM DIAGNOSIS: 11:17:02 Registers: info registers vcpu 0 RAX=ffff88801646b680 RBX=ffff88806ce09b30 RCX=ffffffff81132ffe RDX=ffff88806ce09a48 RSI=0000000000000000 RDI=ffff88806ce09b08 RBP=ffff88801646b680 RSP=ffff88806ce09a48 R8 =0000000000000130 R9 =0000000000000000 R10=ffff88806ce09a98 R11=00000000000b6a61 R12=0000000000000000 R13=ffff88806ce09ac0 R14=ffff88806ce09ae0 R15=ffff88806ce09a98 RIP=ffffffff81133010 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 00007fa61d199700 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=00007f0cdf0b60b0 CR3=0000000019c34000 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=2032303a37313a3131203032206e754a XMM01=73732878696e755f6d6170203a5d3233 XMM02=65736f6c63206e6f6973736573203a29 XMM03=755f6d6170203a5d3233325b64687373 XMM04=69662068637573206f4e203a656c6163 XMM05=3a656c696620766e65206e65706f206f XMM06=65733a6468737328766e655f6d617020 XMM07=6b7a79732032303a37313a3131203032 XMM08=3d656e696c646d632022656369767265 XMM09=00000000000000000000000000000000 XMM10=00000000000000000000000000000000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000 info registers vcpu 1 RAX=0000000000000000 RBX=ffff888016d9f9c0 RCX=ffff888016da0000 RDX=1ffff11002db3f25 RSI=0000000000000001 RDI=ffff888016d9f8d8 RBP=ffff888016de51c0 RSP=ffff888016d9f8d8 R8 =0000000000000000 R9 =0000000000000000 R10=ffff888016d9f928 R11=00000000000b6a61 R12=ffff888016d9f948 R13=ffff888016d9f950 R14=ffff888016d9f970 R15=ffff888016d9f928 RIP=ffffffff81132f33 RFL=00000212 [----A--] 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 00007f0cdeafe900 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=00007f0cdf0b5618 CR3=000000000e33e000 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=6e69676f6c5f6d61702c78756e696c65 XMM02=755f6d61702c74696d7265705f6d6170 XMM03=2c766e655f6d61702c7374696d696c5f XMM04=6d61702c766e655f6d61702c7374696d XMM05=78696e755f6d61702c74696d7265705f XMM06=6469756e69676f6c5f6d61702c78756e XMM07=672065736f6c635f6e6f69737365733a XMM08=61662029286e65706f5f746964756100 XMM09=00000000000000000000000000000000 XMM10=00000000000000000000000000000000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000