syzkaller login: [ 30.855238] BUG: Bad rss-counter state mm:0000000091600214 type:MM_FILEPAGES val:33 [ 30.856447] BUG: Bad rss-counter state mm:0000000091600214 type:MM_ANONPAGES val:22 [ 30.989516] ================================================================== [ 30.990249] BUG: KASAN: slab-use-after-free in vma_interval_tree_remove+0xc75/0xec0 [ 30.990959] Read of size 8 at addr ffff888009d3eb38 by task sshd/219 [ 30.991550] [ 30.991718] CPU: 1 PID: 219 Comm: sshd Not tainted 6.4.0-rc7-next-20230620 #1 [ 30.992392] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS 1.12.0-1 04/01/2014 [ 30.993385] Call Trace: [ 30.993632] <TASK> [ 30.993849] dump_stack_lvl+0x91/0xf0 [ 30.994228] print_report+0xcc/0x620 [ 30.994603] ? __virt_addr_valid+0x102/0x340 [ 30.995049] ? vma_interval_tree_remove+0xc75/0xec0 [ 30.995528] ? vma_interval_tree_remove+0xc75/0xec0 [ 30.996009] kasan_report+0xbe/0xf0 [ 30.996375] ? vma_interval_tree_remove+0xc75/0xec0 [ 30.996844] vma_interval_tree_remove+0xc75/0xec0 [ 30.997310] vma_prepare+0xc54/0x11a0 [ 30.997673] __split_vma+0x5af/0x950 [ 30.998030] ? __pfx___split_vma+0x10/0x10 [ 30.998439] ? find_held_lock+0x2c/0x110 [ 30.998836] do_vmi_align_munmap+0x2ba/0x11f0 [ 30.999277] ? lock_is_held_type+0x9f/0x120 [ 30.999694] ? __pfx_do_vmi_align_munmap+0x10/0x10 [ 31.000172] ? mtree_range_walk+0x632/0x900 [ 31.000597] ? mas_walk+0x5c7/0x7c0 [ 31.000964] do_vmi_munmap+0x1f1/0x2b0 [ 31.001356] mmap_region+0x1f9/0x2660 [ 31.001729] ? vm_mmap_pgoff+0x15c/0x3a0 [ 31.002122] ? __pfx_arch_get_unmapped_area_topdown+0x10/0x10 [ 31.002674] ? __pfx_lock_acquire+0x10/0x10 [ 31.003087] ? __pfx_mmap_region+0x10/0x10 [ 31.003499] ? security_mmap_addr+0x7d/0xa0 [ 31.003941] ? get_unmapped_area+0x1f5/0x3f0 [ 31.004373] do_mmap+0x854/0xf00 [ 31.004717] vm_mmap_pgoff+0x1a6/0x3a0 [ 31.005097] ? __pfx_vm_mmap_pgoff+0x10/0x10 [ 31.005531] ksys_mmap_pgoff+0x3af/0x500 [ 31.005918] do_syscall_64+0x3f/0x90 [ 31.006297] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 31.006798] RIP: 0033:0x7fc9d7db6d82 [ 31.007147] 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 [ 31.008817] RSP: 002b:00007ffc33a7d4f8 EFLAGS: 00000206 ORIG_RAX: 0000000000000009 [ 31.009523] RAX: ffffffffffffffda RBX: 0000000000000812 RCX: 00007fc9d7db6d82 [ 31.010185] RDX: 0000000000000005 RSI: 0000000000001000 RDI: 00007fc9d71f0000 [ 31.010839] RBP: 00007fc9d71f0000 R08: 0000000000000009 R09: 0000000000001000 [ 31.011511] R10: 0000000000000812 R11: 0000000000000206 R12: 000055abe3175b20 [ 31.012197] R13: 00007ffc33a7d510 R14: 00007ffc33a7d540 R15: 00007ffc33a7d8a0 [ 31.012864] </TASK> [ 31.013087] [ 31.013259] Allocated by task 212: [ 31.013590] kasan_save_stack+0x22/0x50 [ 31.013981] kasan_set_track+0x25/0x30 [ 31.014360] __kasan_slab_alloc+0x59/0x70 [ 31.014772] kmem_cache_alloc+0x16b/0x370 [ 31.015168] vm_area_dup+0x20/0x160 [ 31.015516] __split_vma+0x170/0x950 [ 31.015886] split_vma+0xc6/0x110 [ 31.016227] mprotect_fixup+0x8d2/0xb30 [ 31.016612] do_mprotect_pkey+0x87e/0xd40 [ 31.017009] __x64_sys_mprotect+0x78/0xc0 [ 31.017412] do_syscall_64+0x3f/0x90 [ 31.017786] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 31.018282] [ 31.018451] Freed by task 212: [ 31.018753] kasan_save_stack+0x22/0x50 [ 31.019144] kasan_set_track+0x25/0x30 [ 31.019519] kasan_save_free_info+0x2b/0x50 [ 31.019937] __kasan_slab_free+0x10a/0x190 [ 31.020349] kmem_cache_free+0x10d/0x4d0 [ 31.020740] rcu_core+0x8c8/0x2860 [ 31.021106] __do_softirq+0x1b7/0x7d4 [ 31.021490] [ 31.021664] Last potentially related work creation: [ 31.022137] kasan_save_stack+0x22/0x50 [ 31.022554] __kasan_record_aux_stack+0x8e/0xa0 [ 31.023004] __call_rcu_common.constprop.0+0x6a/0xb90 [ 31.023505] remove_vma+0x139/0x170 [ 31.023868] do_vmi_align_munmap+0xd4a/0x11f0 [ 31.024300] do_vmi_munmap+0x1f1/0x2b0 [ 31.024673] __vm_munmap+0x138/0x3a0 [ 31.025031] __x64_sys_munmap+0x59/0x80 [ 31.025416] do_syscall_64+0x3f/0x90 [ 31.025780] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 31.026274] [ 31.026442] The buggy address belongs to the object at ffff888009d3eae0 [ 31.026442] which belongs to the cache vm_area_struct of size 168 [ 31.027573] The buggy address is located 88 bytes inside of [ 31.027573] freed 168-byte region [ffff888009d3eae0, ffff888009d3eb88) [ 31.028669] [ 31.028835] The buggy address belongs to the physical page: [ 31.029343] page:000000005ba212d8 refcount:1 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0x9d3e [ 31.030192] memcg:ffff888017e34f01 [ 31.030520] flags: 0x100000000000200(slab|node=0|zone=1) [ 31.031017] page_type: 0xffffffff() [ 31.031365] raw: 0100000000000200 ffff8880087a0c80 dead000000000122 0000000000000000 [ 31.032097] raw: 0000000000000000 0000000000110011 00000001ffffffff ffff888017e34f01 [ 31.032801] page dumped because: kasan: bad access detected [ 31.033323] [ 31.033586] Memory state around the buggy address: [ 31.034039] ffff888009d3ea00: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 [ 31.034705] ffff888009d3ea80: 00 00 00 00 fc fc fc fc fc fc fc fc fa fb fb fb [ 31.035372] >ffff888009d3eb00: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb [ 31.036044] ^ [ 31.036523] ffff888009d3eb80: fb fc fc fc fc fc fc fc fc fa fb fb fb fb fb fb [ 31.037187] ffff888009d3ec00: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fc fc [ 31.037845] ================================================================== [ 31.038588] Disabling lock debugging due to kernel taint [ 32.898625] BUG: Bad rss-counter state mm:000000007f1bfab1 type:MM_FILEPAGES val:31 [ 32.899774] BUG: Bad rss-counter state mm:000000007f1bfab1 type:MM_ANONPAGES val:22 [ 33.269804] BUG: Bad rss-counter state mm:0000000042a91468 type:MM_FILEPAGES val:33 [ 33.270575] BUG: Bad rss-counter state mm:0000000042a91468 type:MM_ANONPAGES val:22 Warning: Permanently added '[localhost]:34857' (ECDSA) to the list of known hosts. 2023/06/20 13:22:26 fuzzer started 2023/06/20 13:22:26 dialing manager at localhost:36067 2023/06/20 13:22:26 checking machine... 2023/06/20 13:22:26 checking revisions... [ 33.891522] kmemleak: Automatic memory scanning thread ended 2023/06/20 13:22:26 testing simple program... [ 33.949138] cgroup: Unknown subsys name 'net' [ 34.001888] cgroup: Unknown subsys name 'rlimit' executing program executing program executing program VM DIAGNOSIS: 13:22:26 Registers: info registers vcpu 0 RAX=ffff88806ce35000 RBX=0000000000000000 RCX=ffffffff8451250e RDX=ffffed100d9c6a01 RSI=0000000000000004 RDI=ffffffff81288ac5 RBP=dffffc0000000000 RSP=ffffffff85407e10 R8 =0000000000000000 R9 =ffffed100d9c6a00 R10=ffff88806ce35003 R11=ffff888008c04000 R12=ffffffff85d3d350 R13=1ffffffff0a80fc7 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 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=00007fa03f057550 CR3=000000000d856000 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=f78eabdaf041e7b61344daf57664e0d3 XMM02=2c67c8bc2e329bc3000000000011ae40 XMM03=fb795ef6d65770560000000000121ed8 XMM04=5d3ed2ba909180f200000000000ae988 XMM05=3a235e8011efe2ff0000000000132af8 XMM06=806171799158d9670000000000131b98 XMM07=e042d86d42eb936e0000000000122158 XMM08=f88343c5011ef170000000000011aea0 XMM09=00000000000000000000000000000000 XMM10=20200000000020202020202020200000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000 info registers vcpu 1 RAX=0000000000000000 RBX=0000000000000001 RCX=ffffffff84498e0e RDX=ffff888016808000 RSI=0000000000000000 RDI=0000000000000005 RBP=ffffffff84e3a080 RSP=ffff888010227410 R8 =0000000000000005 R9 =0000000000000000 R10=0000000000000001 R11=ffff88800ec49d98 R12=0000000000000001 R13=0000000000000005 R14=0000000000000003 R15=0000000000000013 RIP=ffffffff814c027c 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 00007f21001ed900 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=00007f2100192008 CR3=000000000d874000 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=652022746f6f72223d74636361207469 XMM02=3d6c616e696d72657420322e322e302e XMM03=3d656d616e74736f682022646873732f XMM04=40404040404040404040404040404040 XMM05=5a5a5a5a5a5a5a5a5a5a5a5a5a5a5a5a XMM06=20202020202020202020202020202020 XMM07=00000000000000000000000000000000 XMM08=652075253d64692073253d706f000000 XMM09=00000000000000000000000000000000 XMM10=00000000000000000000000000000000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000