syzkaller login: [ 30.857517] BUG: Bad rss-counter state mm:000000006a701727 type:MM_FILEPAGES val:33 [ 30.858511] BUG: Bad rss-counter state mm:000000006a701727 type:MM_ANONPAGES val:22 [ 31.024600] ================================================================== [ 31.025474] BUG: KASAN: slab-use-after-free in vma_interval_tree_remove+0xc75/0xec0 [ 31.026366] Read of size 8 at addr ffff88800e653058 by task sshd/219 [ 31.027107] [ 31.027322] CPU: 0 PID: 219 Comm: sshd Not tainted 6.4.0-rc7-next-20230620 #1 [ 31.028233] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS 1.12.0-1 04/01/2014 [ 31.029145] Call Trace: [ 31.029449] [ 31.029802] dump_stack_lvl+0x91/0xf0 [ 31.030456] print_report+0xcc/0x620 [ 31.031059] ? __virt_addr_valid+0x102/0x340 [ 31.031742] ? vma_interval_tree_remove+0xc75/0xec0 [ 31.032511] ? vma_interval_tree_remove+0xc75/0xec0 [ 31.033281] kasan_report+0xbe/0xf0 [ 31.033880] ? vma_interval_tree_remove+0xc75/0xec0 [ 31.034699] vma_interval_tree_remove+0xc75/0xec0 [ 31.035408] vma_prepare+0xc54/0x11a0 [ 31.035883] __split_vma+0x5af/0x950 [ 31.036346] ? __pfx___split_vma+0x10/0x10 [ 31.036861] ? find_held_lock+0x2c/0x110 [ 31.037379] do_vmi_align_munmap+0x2ba/0x11f0 [ 31.037939] ? lock_is_held_type+0x9f/0x120 [ 31.038542] ? __pfx_do_vmi_align_munmap+0x10/0x10 [ 31.039272] ? mtree_range_walk+0x632/0x900 [ 31.039934] ? mas_walk+0x5c7/0x7c0 [ 31.040514] do_vmi_munmap+0x1f1/0x2b0 [ 31.041115] mmap_region+0x1f9/0x2660 [ 31.041691] ? vm_mmap_pgoff+0x15c/0x3a0 [ 31.042304] ? __pfx_arch_get_unmapped_area_topdown+0x10/0x10 [ 31.043186] ? __pfx_lock_acquire+0x10/0x10 [ 31.043831] ? __pfx_mmap_region+0x10/0x10 [ 31.044475] ? security_mmap_addr+0x7d/0xa0 [ 31.045132] ? get_unmapped_area+0x1f5/0x3f0 [ 31.045800] do_mmap+0x854/0xf00 [ 31.046331] vm_mmap_pgoff+0x1a6/0x3a0 [ 31.046955] ? __pfx_vm_mmap_pgoff+0x10/0x10 [ 31.047641] ksys_mmap_pgoff+0x3af/0x500 [ 31.048266] do_syscall_64+0x3f/0x90 [ 31.048843] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 31.049639] RIP: 0033:0x7f53bf546d82 [ 31.050209] 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 [ 31.052800] RSP: 002b:00007ffd2e0b1188 EFLAGS: 00000206 ORIG_RAX: 0000000000000009 [ 31.053909] RAX: ffffffffffffffda RBX: 0000000000000812 RCX: 00007f53bf546d82 [ 31.054960] RDX: 0000000000000005 RSI: 0000000000001000 RDI: 00007f53be980000 [ 31.056011] RBP: 00007f53be980000 R08: 0000000000000009 R09: 0000000000001000 [ 31.057047] R10: 0000000000000812 R11: 0000000000000206 R12: 00005637b6458ec0 [ 31.058083] R13: 00007ffd2e0b11a0 R14: 00007ffd2e0b11d0 R15: 00007ffd2e0b1530 [ 31.059149] [ 31.059505] [ 31.059762] Allocated by task 212: [ 31.060284] kasan_save_stack+0x22/0x50 [ 31.060878] kasan_set_track+0x25/0x30 [ 31.061474] __kasan_slab_alloc+0x59/0x70 [ 31.062103] kmem_cache_alloc+0x16b/0x370 [ 31.062738] vm_area_dup+0x20/0x160 [ 31.063286] __split_vma+0x170/0x950 [ 31.063845] split_vma+0xc6/0x110 [ 31.064367] mprotect_fixup+0x8d2/0xb30 [ 31.064967] do_mprotect_pkey+0x87e/0xd40 [ 31.065606] __x64_sys_mprotect+0x78/0xc0 [ 31.066235] do_syscall_64+0x3f/0x90 [ 31.066736] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 31.067379] [ 31.067592] Freed by task 212: [ 31.067984] kasan_save_stack+0x22/0x50 [ 31.068484] kasan_set_track+0x25/0x30 [ 31.068970] kasan_save_free_info+0x2b/0x50 [ 31.069499] __kasan_slab_free+0x10a/0x190 [ 31.070030] kmem_cache_free+0x10d/0x4d0 [ 31.070561] rcu_core+0x8c8/0x2860 [ 31.070999] __do_softirq+0x1b7/0x7d4 [ 31.071471] [ 31.071678] Last potentially related work creation: [ 31.072262] kasan_save_stack+0x22/0x50 [ 31.072753] __kasan_record_aux_stack+0x8e/0xa0 [ 31.073325] __call_rcu_common.constprop.0+0x6a/0xb90 [ 31.073956] remove_vma+0x139/0x170 [ 31.074427] do_vmi_align_munmap+0xd4a/0x11f0 [ 31.074983] do_vmi_munmap+0x1f1/0x2b0 [ 31.075474] __vm_munmap+0x138/0x3a0 [ 31.075928] __x64_sys_munmap+0x59/0x80 [ 31.076424] do_syscall_64+0x3f/0x90 [ 31.076895] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 31.077540] [ 31.077755] Second to last potentially related work creation: [ 31.078438] kasan_save_stack+0x22/0x50 [ 31.078937] __kasan_record_aux_stack+0x8e/0xa0 [ 31.079510] __call_rcu_common.constprop.0+0x6a/0xb90 [ 31.080140] remove_vma+0x139/0x170 [ 31.080583] do_vmi_align_munmap+0xd4a/0x11f0 [ 31.081132] do_vmi_munmap+0x1f1/0x2b0 [ 31.081604] __vm_munmap+0x138/0x3a0 [ 31.082070] __x64_sys_munmap+0x59/0x80 [ 31.082584] do_syscall_64+0x3f/0x90 [ 31.083047] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 31.083681] [ 31.083889] The buggy address belongs to the object at ffff88800e653000 [ 31.083889] which belongs to the cache vm_area_struct of size 168 [ 31.085344] The buggy address is located 88 bytes inside of [ 31.085344] freed 168-byte region [ffff88800e653000, ffff88800e6530a8) [ 31.086736] [ 31.086955] The buggy address belongs to the physical page: [ 31.087610] page:000000003d37663f refcount:1 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0xe653 [ 31.088693] memcg:ffff88800e7efe01 [ 31.089118] anon flags: 0x100000000000200(slab|node=0|zone=1) [ 31.089809] page_type: 0xffffffff() [ 31.090255] raw: 0100000000000200 ffff8880087a0c80 ffffea0000354980 dead000000000007 [ 31.091203] raw: 0000000000000000 0000000000110011 00000001ffffffff ffff88800e7efe01 [ 31.092099] page dumped because: kasan: bad access detected [ 31.092753] [ 31.092968] Memory state around the buggy address: [ 31.093548] ffff88800e652f00: fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc [ 31.094387] ffff88800e652f80: fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc [ 31.095246] >ffff88800e653000: fa fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb [ 31.096077] ^ [ 31.096779] ffff88800e653080: fb fb fb fb fb fc fc fc fc fc fc fc fc 00 00 00 [ 31.097620] ffff88800e653100: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 [ 31.098457] ================================================================== [ 31.099426] Disabling lock debugging due to kernel taint [ 32.903032] BUG: Bad rss-counter state mm:00000000b3bb74f2 type:MM_FILEPAGES val:33 [ 32.903796] BUG: Bad rss-counter state mm:00000000b3bb74f2 type:MM_ANONPAGES val:22 [ 33.388372] BUG: Bad rss-counter state mm:00000000ccf37f15 type:MM_FILEPAGES val:33 [ 33.389395] BUG: Bad rss-counter state mm:00000000ccf37f15 type:MM_ANONPAGES val:22 Warning: Permanently added '[localhost]:59540' (ECDSA) to the list of known hosts. 2023/06/21 07:00:26 fuzzer started 2023/06/21 07:00:26 dialing manager at localhost:36067 2023/06/21 07:00:27 checking machine... 2023/06/21 07:00:27 checking revisions... [ 34.093967] kmemleak: Automatic memory scanning thread ended 2023/06/21 07:00:27 testing simple program... [ 34.148858] cgroup: Unknown subsys name 'net' [ 34.213691] cgroup: Unknown subsys name 'rlimit' executing program executing program executing program VM DIAGNOSIS: 07:00:26 Registers: info registers vcpu 0 RAX=dffffc0000000000 RBX=0000000000000001 RCX=ffffffff864b202c RDX=ffff888017cef778 RSI=1ffff11002f9def1 RDI=1ffff11002f9def1 RBP=ffff888017cef788 RSP=ffff888017cef6c0 R8 =ffffffff864b2030 R9 =ffff888017cef770 R10=0000000000038001 R11=00000000000b5080 R12=ffff888017cef790 R13=ffff888017cef778 R14=ffff888017ceff58 R15=ffff888017cef730 RIP=ffffffff811310a7 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 00007f54ab5d2700 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=00007fe37240f0b0 CR3=000000000c6ce000 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=2036323a30303a3730203132206e754a XMM01=73732878696e755f6d6170203a5d3832 XMM02=65736f6c63206e6f6973736573203a29 XMM03=755f6d6170203a5d3832325b64687373 XMM04=69662068637573206f4e203a656c6163 XMM05=3a656c696620766e65206e65706f206f XMM06=65733a6468737328766e655f6d617020 XMM07=6b7a79732036323a30303a3730203132 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=0000000000000001 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=00007f28a8a36d10 CR3=000000000d60e000 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=71c42544ecb6bebbe94d6b2e372e0a6d XMM02=ec2efd57dc4c00df000000000011a380 XMM03=4fa2da3e20f0fc44000000000011a450 XMM04=3e7ef226cc64694500000000000ae988 XMM05=dfcdbad4f1609c370000000000132820 XMM06=806171799158d96700000000001326a8 XMM07=e042d86d42eb936e0000000000121878 XMM08=4fa2da3e20f0fc44000000000011a450 XMM09=00000000000000000000000000000000 XMM10=20200000000020202020202020200000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000