syzkaller login: [ 30.959518] BUG: Bad rss-counter state mm:0000000007ddf782 type:MM_FILEPAGES val:33 [ 30.960316] BUG: Bad rss-counter state mm:0000000007ddf782 type:MM_ANONPAGES val:22 [ 31.017163] ================================================================== [ 31.017895] BUG: KASAN: slab-use-after-free in vma_interval_tree_remove+0xc75/0xec0 [ 31.018617] Read of size 8 at addr ffff8880102fb140 by task sshd/219 [ 31.019200] [ 31.019365] CPU: 1 PID: 219 Comm: sshd Not tainted 6.4.0-rc7-next-20230620 #1 [ 31.020027] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS 1.12.0-1 04/01/2014 [ 31.020775] Call Trace: [ 31.021031] [ 31.021246] dump_stack_lvl+0x91/0xf0 [ 31.021642] print_report+0xcc/0x620 [ 31.022130] ? __virt_addr_valid+0x102/0x340 [ 31.022521] ? vma_interval_tree_remove+0xc75/0xec0 [ 31.022856] ? vma_interval_tree_remove+0xc75/0xec0 [ 31.023187] kasan_report+0xbe/0xf0 [ 31.023451] ? vma_interval_tree_remove+0xc75/0xec0 [ 31.023796] vma_interval_tree_remove+0xc75/0xec0 [ 31.024125] vma_prepare+0xc54/0x11a0 [ 31.024385] __split_vma+0x5af/0x950 [ 31.024653] ? __pfx___split_vma+0x10/0x10 [ 31.024949] ? find_held_lock+0x2c/0x110 [ 31.025235] do_vmi_align_munmap+0x2ba/0x11f0 [ 31.025560] ? lock_is_held_type+0x9f/0x120 [ 31.025859] ? __pfx_do_vmi_align_munmap+0x10/0x10 [ 31.026187] ? mtree_range_walk+0x632/0x900 [ 31.026506] ? mas_walk+0x5c7/0x7c0 [ 31.026786] do_vmi_munmap+0x1f1/0x2b0 [ 31.027072] mmap_region+0x1f9/0x2660 [ 31.027352] ? vm_mmap_pgoff+0x15c/0x3a0 [ 31.027661] ? __pfx_arch_get_unmapped_area_topdown+0x10/0x10 [ 31.028088] ? __pfx_lock_acquire+0x10/0x10 [ 31.028401] ? __pfx_mmap_region+0x10/0x10 [ 31.028718] ? security_mmap_addr+0x7d/0xa0 [ 31.029032] ? get_unmapped_area+0x1f5/0x3f0 [ 31.029349] do_mmap+0x854/0xf00 [ 31.029613] vm_mmap_pgoff+0x1a6/0x3a0 [ 31.029900] ? __pfx_vm_mmap_pgoff+0x10/0x10 [ 31.030229] ksys_mmap_pgoff+0x3af/0x500 [ 31.030524] do_syscall_64+0x3f/0x90 [ 31.030806] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 31.031175] RIP: 0033:0x7f622240dd82 [ 31.031449] 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 [ 31.032734] RSP: 002b:00007ffd8c808be8 EFLAGS: 00000206 ORIG_RAX: 0000000000000009 [ 31.033277] RAX: ffffffffffffffda RBX: 0000000000000812 RCX: 00007f622240dd82 [ 31.033789] RDX: 0000000000000005 RSI: 0000000000001000 RDI: 00007f6221847000 [ 31.034289] RBP: 00007f6221847000 R08: 0000000000000009 R09: 0000000000001000 [ 31.034781] R10: 0000000000000812 R11: 0000000000000206 R12: 000055ba35bd3ec0 [ 31.035282] R13: 00007ffd8c808c00 R14: 00007ffd8c808c30 R15: 00007ffd8c808f90 [ 31.035798] [ 31.035964] [ 31.036090] Allocated by task 212: [ 31.036339] kasan_save_stack+0x22/0x50 [ 31.036638] kasan_set_track+0x25/0x30 [ 31.036938] __kasan_slab_alloc+0x59/0x70 [ 31.037244] kmem_cache_alloc+0x16b/0x370 [ 31.037557] vm_area_dup+0x20/0x160 [ 31.037824] __split_vma+0x170/0x950 [ 31.038087] split_vma+0xc6/0x110 [ 31.038345] mprotect_fixup+0x8d2/0xb30 [ 31.038643] do_mprotect_pkey+0x87e/0xd40 [ 31.038950] __x64_sys_mprotect+0x78/0xc0 [ 31.039253] do_syscall_64+0x3f/0x90 [ 31.039539] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 31.039923] [ 31.040047] Freed by task 212: [ 31.040268] kasan_save_stack+0x22/0x50 [ 31.040561] kasan_set_track+0x25/0x30 [ 31.040847] kasan_save_free_info+0x2b/0x50 [ 31.041156] __kasan_slab_free+0x10a/0x190 [ 31.041467] kmem_cache_free+0x10d/0x4d0 [ 31.041767] rcu_core+0x8c8/0x2860 [ 31.042025] __do_softirq+0x1b7/0x7d4 [ 31.042300] [ 31.042420] Last potentially related work creation: [ 31.042768] kasan_save_stack+0x22/0x50 [ 31.043058] __kasan_record_aux_stack+0x8e/0xa0 [ 31.043382] __call_rcu_common.constprop.0+0x6a/0xb90 [ 31.043764] remove_vma+0x139/0x170 [ 31.044028] do_vmi_align_munmap+0xd4a/0x11f0 [ 31.044346] do_vmi_munmap+0x1f1/0x2b0 [ 31.044634] __vm_munmap+0x138/0x3a0 [ 31.044907] __x64_sys_munmap+0x59/0x80 [ 31.045204] do_syscall_64+0x3f/0x90 [ 31.045493] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 31.045857] [ 31.045978] The buggy address belongs to the object at ffff8880102fb0e8 [ 31.045978] which belongs to the cache vm_area_struct of size 168 [ 31.046845] The buggy address is located 88 bytes inside of [ 31.046845] freed 168-byte region [ffff8880102fb0e8, ffff8880102fb190) [ 31.047667] [ 31.047786] The buggy address belongs to the physical page: [ 31.048171] page:000000005a4df06e refcount:1 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0x102fb [ 31.048807] memcg:ffff888014710601 [ 31.049057] flags: 0x100000000000200(slab|node=0|zone=1) [ 31.049427] page_type: 0xffffffff() [ 31.049704] raw: 0100000000000200 ffff8880087a0c80 dead000000000122 0000000000000000 [ 31.050229] raw: 0000000000000000 0000000000110011 00000001ffffffff ffff888014710601 [ 31.050760] page dumped because: kasan: bad access detected [ 31.051147] [ 31.051269] Memory state around the buggy address: [ 31.051612] ffff8880102fb000: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 [ 31.052113] ffff8880102fb080: 00 00 00 00 00 fc fc fc fc fc fc fc fc fa fb fb [ 31.052627] >ffff8880102fb100: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb [ 31.053131] ^ [ 31.053516] ffff8880102fb180: fb fb fc fc fc fc fc fc fc fc fa fb fb fb fb fb [ 31.054010] ffff8880102fb200: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fc [ 31.054509] ================================================================== [ 31.055050] Disabling lock debugging due to kernel taint [ 33.075628] BUG: Bad rss-counter state mm:000000004b896aba type:MM_FILEPAGES val:33 [ 33.076778] BUG: Bad rss-counter state mm:000000004b896aba type:MM_ANONPAGES val:22 [ 33.453534] BUG: Bad rss-counter state mm:000000006630402a type:MM_FILEPAGES val:33 [ 33.454630] BUG: Bad rss-counter state mm:000000006630402a type:MM_ANONPAGES val:22 Warning: Permanently added '[localhost]:34427' (ECDSA) to the list of known hosts. 2023/06/21 05:48:48 fuzzer started 2023/06/21 05:48:48 dialing manager at localhost:36067 2023/06/21 05:48:48 checking machine... 2023/06/21 05:48:48 checking revisions... [ 34.202418] kmemleak: Automatic memory scanning thread ended 2023/06/21 05:48:48 testing simple program... [ 34.252167] cgroup: Unknown subsys name 'net' [ 34.309283] cgroup: Unknown subsys name 'rlimit' executing program executing program executing program VM DIAGNOSIS: 05:48:48 Registers: info registers vcpu 0 RAX=0000000000000001 RBX=0000000000000000 RCX=ffffffff812d86ea RDX=fffffbfff0ba7a6b RSI=0000000000000008 RDI=ffffffff85d3d350 RBP=1ffff11002c3ff38 RSP=ffff8880161ff9a0 R8 =0000000000000000 R9 =fffffbfff0ba7a6a R10=ffffffff85d3d357 R11=00000000000b6a61 R12=ffffffff8560b640 R13=ffffffff8164d133 R14=ffff8880159db000 R15=000000000000002b RIP=ffffffff8135b935 RFL=00000247 [---Z-PC] 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 00007f7b413f5700 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=00007f2a133bf0b0 CR3=000000000dc92000 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=2038343a38343a3530203132206e754a XMM01=73732878696e755f6d6170203a5d3832 XMM02=65736f6c63206e6f6973736573203a29 XMM03=755f6d6170203a5d3832325b64687373 XMM04=69662068637573206f4e203a656c6163 XMM05=3a656c696620766e65206e65706f206f XMM06=65733a6468737328766e655f6d617020 XMM07=6b7a79732037343a38343a3530203132 XMM08=3d656e696c646d632022656369767265 XMM09=00000000000000000000000000000000 XMM10=00000000000000000000000000000000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000 info registers vcpu 1 RAX=ffff88806cf35000 RBX=0000000000000001 RCX=ffffffff8451250e RDX=ffffed100d9e6a01 RSI=0000000000000004 RDI=ffffffff81288ac5 RBP=dffffc0000000000 RSP=ffff888008e07e70 R8 =0000000000000000 R9 =ffffed100d9e6a00 R10=ffff88806cf35003 R11=ffff888008c04400 R12=ffffffff85d3d350 R13=1ffff110011c0fd3 R14=0000000000000000 R15=0000000000000000 RIP=ffffffff8451349f 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=00007fae202ae000 CR3=000000000d990000 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=bc1c85f31eb791a8c34a74bcaf1a2508 XMM02=2c67c8bc2e329bc3000000000011ab30 XMM03=fb795ef6d65770560000000000121f98 XMM04=f9259219e976545200000000000ae988 XMM05=63f45ef9383289f40000000000132bb8 XMM06=806171799158d9670000000000131c58 XMM07=e042d86d42eb936e0000000000122218 XMM08=cdd2baccbb7d11f2000000000011ab90 XMM09=00000000000000000000000000000000 XMM10=00000000000000000000000000000000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000