syzkaller login: [ 30.857590] BUG: Bad rss-counter state mm:00000000ac75d76a type:MM_FILEPAGES val:33 [ 30.859180] BUG: Bad rss-counter state mm:00000000ac75d76a type:MM_ANONPAGES val:22 [ 31.021787] ================================================================== [ 31.022776] BUG: KASAN: slab-use-after-free in vma_interval_tree_remove+0xc75/0xec0 [ 31.023815] Read of size 8 at addr ffff88800e380228 by task sshd/220 [ 31.024875] [ 31.025188] CPU: 1 PID: 220 Comm: sshd Not tainted 6.4.0-rc7-next-20230620 #1 [ 31.026130] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS 1.12.0-1 04/01/2014 [ 31.027199] Call Trace: [ 31.027561] [ 31.027869] dump_stack_lvl+0x91/0xf0 [ 31.028385] print_report+0xcc/0x620 [ 31.028913] ? __virt_addr_valid+0x102/0x340 [ 31.029499] ? vma_interval_tree_remove+0xc75/0xec0 [ 31.030179] ? vma_interval_tree_remove+0xc75/0xec0 [ 31.030841] kasan_report+0xbe/0xf0 [ 31.031353] ? vma_interval_tree_remove+0xc75/0xec0 [ 31.032057] vma_interval_tree_remove+0xc75/0xec0 [ 31.032718] vma_prepare+0xc54/0x11a0 [ 31.033225] __split_vma+0x5af/0x950 [ 31.033755] ? __pfx___split_vma+0x10/0x10 [ 31.034316] ? find_held_lock+0x2c/0x110 [ 31.034891] do_vmi_align_munmap+0x2ba/0x11f0 [ 31.035506] ? lock_is_held_type+0x9f/0x120 [ 31.036124] ? __pfx_do_vmi_align_munmap+0x10/0x10 [ 31.036794] ? mtree_range_walk+0x632/0x900 [ 31.037391] ? mas_walk+0x5c7/0x7c0 [ 31.037922] do_vmi_munmap+0x1f1/0x2b0 [ 31.038446] mmap_region+0x1f9/0x2660 [ 31.038980] ? vm_mmap_pgoff+0x15c/0x3a0 [ 31.039536] ? __pfx_arch_get_unmapped_area_topdown+0x10/0x10 [ 31.040331] ? __pfx_lock_acquire+0x10/0x10 [ 31.040921] ? __pfx_mmap_region+0x10/0x10 [ 31.041493] ? security_mmap_addr+0x7d/0xa0 [ 31.042079] ? get_unmapped_area+0x1f5/0x3f0 [ 31.042682] do_mmap+0x854/0xf00 [ 31.043152] vm_mmap_pgoff+0x1a6/0x3a0 [ 31.043708] ? __pfx_vm_mmap_pgoff+0x10/0x10 [ 31.044308] ksys_mmap_pgoff+0x3af/0x500 [ 31.044870] do_syscall_64+0x3f/0x90 [ 31.045378] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 31.046088] RIP: 0033:0x7fe6baaf5d82 [ 31.046595] 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 [ 31.048922] RSP: 002b:00007ffc8ba95a88 EFLAGS: 00000206 ORIG_RAX: 0000000000000009 [ 31.049913] RAX: ffffffffffffffda RBX: 0000000000000812 RCX: 00007fe6baaf5d82 [ 31.050833] RDX: 0000000000000005 RSI: 0000000000001000 RDI: 00007fe6b9f2f000 [ 31.051765] RBP: 00007fe6b9f2f000 R08: 0000000000000009 R09: 0000000000001000 [ 31.052681] R10: 0000000000000812 R11: 0000000000000206 R12: 0000557edf25dec0 [ 31.053593] R13: 00007ffc8ba95aa0 R14: 00007ffc8ba95ad0 R15: 00007ffc8ba95e30 [ 31.054507] [ 31.054836] [ 31.055066] Allocated by task 213: [ 31.055537] kasan_save_stack+0x22/0x50 [ 31.056113] kasan_set_track+0x25/0x30 [ 31.056660] __kasan_slab_alloc+0x59/0x70 [ 31.057219] kmem_cache_alloc+0x16b/0x370 [ 31.057793] vm_area_dup+0x20/0x160 [ 31.058278] __split_vma+0x170/0x950 [ 31.058790] split_vma+0xc6/0x110 [ 31.059260] mprotect_fixup+0x8d2/0xb30 [ 31.059823] do_mprotect_pkey+0x87e/0xd40 [ 31.060378] __x64_sys_mprotect+0x78/0xc0 [ 31.060955] do_syscall_64+0x3f/0x90 [ 31.061460] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 31.062161] [ 31.062391] Freed by task 213: [ 31.062836] kasan_save_stack+0x22/0x50 [ 31.063379] kasan_set_track+0x25/0x30 [ 31.063941] kasan_save_free_info+0x2b/0x50 [ 31.064530] __kasan_slab_free+0x10a/0x190 [ 31.065106] kmem_cache_free+0x10d/0x4d0 [ 31.065698] rcu_core+0x8c8/0x2860 [ 31.066362] __do_softirq+0x1b7/0x7d4 [ 31.066895] [ 31.067127] Last potentially related work creation: [ 31.067787] kasan_save_stack+0x22/0x50 [ 31.068322] __kasan_record_aux_stack+0x8e/0xa0 [ 31.068951] __call_rcu_common.constprop.0+0x6a/0xb90 [ 31.069656] remove_vma+0x139/0x170 [ 31.070135] do_vmi_align_munmap+0xd4a/0x11f0 [ 31.070742] do_vmi_munmap+0x1f1/0x2b0 [ 31.071257] __vm_munmap+0x138/0x3a0 [ 31.071793] __x64_sys_munmap+0x59/0x80 [ 31.072324] do_syscall_64+0x3f/0x90 [ 31.072846] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 31.073548] [ 31.073784] Second to last potentially related work creation: [ 31.074517] kasan_save_stack+0x22/0x50 [ 31.075063] __kasan_record_aux_stack+0x8e/0xa0 [ 31.075714] __call_rcu_common.constprop.0+0x6a/0xb90 [ 31.076395] remove_vma+0x139/0x170 [ 31.076890] do_vmi_align_munmap+0xd4a/0x11f0 [ 31.077494] do_vmi_munmap+0x1f1/0x2b0 [ 31.078031] mmap_region+0x1f9/0x2660 [ 31.078558] do_mmap+0x854/0xf00 [ 31.079019] vm_mmap_pgoff+0x1a6/0x3a0 [ 31.079572] ksys_mmap_pgoff+0x7d/0x500 [ 31.080111] do_syscall_64+0x3f/0x90 [ 31.080643] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 31.081329] [ 31.081577] The buggy address belongs to the object at ffff88800e3801d0 [ 31.081577] which belongs to the cache vm_area_struct of size 168 [ 31.083162] The buggy address is located 88 bytes inside of [ 31.083162] freed 168-byte region [ffff88800e3801d0, ffff88800e380278) [ 31.084695] [ 31.084927] The buggy address belongs to the physical page: [ 31.085646] page:0000000071e33945 refcount:1 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0xe380 [ 31.086814] memcg:ffff88800e36e701 [ 31.087269] flags: 0x100000000000200(slab|node=0|zone=1) [ 31.087995] page_type: 0xffffffff() [ 31.088473] raw: 0100000000000200 ffff8880087a0c80 ffffea000039ff40 dead00000000000a [ 31.089499] raw: 0000000000000000 0000000000110011 00000001ffffffff ffff88800e36e701 [ 31.090481] page dumped because: kasan: bad access detected [ 31.091188] [ 31.091417] Memory state around the buggy address: [ 31.092061] ffff88800e380100: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 [ 31.093002] ffff88800e380180: 00 00 fc fc fc fc fc fc fc fc fa fb fb fb fb fb [ 31.093928] >ffff88800e380200: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fc [ 31.094843] ^ [ 31.095433] ffff88800e380280: fc fc fc fc fc fc fc fa fb fb fb fb fb fb fb fb [ 31.096381] ffff88800e380300: fb fb fb fb fb fb fb fb fb fb fb fb fc fc fc fc [ 31.097311] ================================================================== [ 31.098347] Disabling lock debugging due to kernel taint [ 33.147430] BUG: Bad rss-counter state mm:000000003d04fa56 type:MM_FILEPAGES val:33 [ 33.148212] BUG: Bad rss-counter state mm:000000003d04fa56 type:MM_ANONPAGES val:22 [ 33.617683] BUG: Bad rss-counter state mm:0000000007df274e type:MM_FILEPAGES val:33 [ 33.618665] BUG: Bad rss-counter state mm:0000000007df274e type:MM_ANONPAGES val:22 Warning: Permanently added '[localhost]:46121' (ECDSA) to the list of known hosts. 2023/06/21 08:50:03 fuzzer started 2023/06/21 08:50:03 dialing manager at localhost:36067 2023/06/21 08:50:03 checking machine... 2023/06/21 08:50:03 checking revisions... [ 34.393392] kmemleak: Automatic memory scanning thread ended 2023/06/21 08:50:04 testing simple program... [ 34.450124] cgroup: Unknown subsys name 'net' [ 34.493572] cgroup: Unknown subsys name 'rlimit' executing program executing program executing program VM DIAGNOSIS: 08:50:03 Registers: info registers vcpu 0 RAX=dffffc0000000000 RBX=000ffffffffff000 RCX=0000000000000000 RDX=1ffffd400006b4bd RSI=ffffffff8175d054 RDI=ffffea000035a5e8 RBP=0000000000000043 RSP=ffff888014217d00 R8 =0000000000000007 R9 =0000000000000000 R10=0000000000000000 R11=0000000000000000 R12=ffffea000035a5c0 R13=ffff88800d697088 R14=ffff888014217df0 R15=0000000000000000 RIP=ffffffff8175d09b 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 =0000 0000000000000000 00000000 00000000 DS =0000 0000000000000000 00000000 00000000 FS =0000 00007fed5ebdf900 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=000055834ea11f40 CR3=0000000015b2e000 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=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 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=00007f432794c8c8 CR3=000000000dca4000 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=2033303a30353a3830203132206e754a XMM01=73732878696e755f6d6170203a5d3033 XMM02=65736f6c63206e6f6973736573203a29 XMM03=755f6d6170203a5d3033325b64687373 XMM04=69662068637573206f4e203a656c6163 XMM05=3a656c696620766e65206e65706f206f XMM06=65733a6468737328766e655f6d617020 XMM07=6b7a79732033303a30353a3830203132 XMM08=5f6d65747379733d6a62757320353932 XMM09=00000000000000000000000000000000 XMM10=00000000000000000000000000000000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000