[ 23.836485] BUG: Bad rss-counter state mm:000000005a7b8233 type:MM_FILEPAGES val:33 [ 23.837534] BUG: Bad rss-counter state mm:000000005a7b8233 type:MM_ANONPAGES val:22 Debian GNU/Linux 11 syzkaller ttyS0 syzkaller login: [ 24.006395] ================================================================== [ 24.007497] BUG: KASAN: slab-use-after-free in vma_interval_tree_remove+0xc75/0xec0 [ 24.008683] Read of size 8 at addr ffff88800e027228 by task sshd/219 [ 24.009698] [ 24.009914] CPU: 1 PID: 219 Comm: sshd Not tainted 6.4.0-rc7-next-20230620 #1 [ 24.010773] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS 1.12.0-1 04/01/2014 [ 24.011764] Call Trace: [ 24.012097] [ 24.012377] dump_stack_lvl+0x91/0xf0 [ 24.012891] print_report+0xcc/0x620 [ 24.013372] ? __virt_addr_valid+0x102/0x340 [ 24.013923] ? vma_interval_tree_remove+0xc75/0xec0 [ 24.014541] ? vma_interval_tree_remove+0xc75/0xec0 [ 24.015156] kasan_report+0xbe/0xf0 [ 24.015637] ? vma_interval_tree_remove+0xc75/0xec0 [ 24.016252] vma_interval_tree_remove+0xc75/0xec0 [ 24.016875] vma_prepare+0xc54/0x11a0 [ 24.017351] __split_vma+0x5af/0x950 [ 24.017819] ? __pfx___split_vma+0x10/0x10 [ 24.018355] ? find_held_lock+0x2c/0x110 [ 24.018867] do_vmi_align_munmap+0x2ba/0x11f0 [ 24.019430] ? lock_is_held_type+0x9f/0x120 [ 24.020010] ? __pfx_do_vmi_align_munmap+0x10/0x10 [ 24.020669] ? mtree_range_walk+0x632/0x900 [ 24.021230] ? mas_walk+0x5c7/0x7c0 [ 24.021735] do_vmi_munmap+0x1f1/0x2b0 [ 24.022238] mmap_region+0x1f9/0x2660 [ 24.022730] ? vm_mmap_pgoff+0x15c/0x3a0 [ 24.023249] ? __pfx_arch_get_unmapped_area_topdown+0x10/0x10 [ 24.023967] ? __pfx_lock_acquire+0x10/0x10 [ 24.024508] ? __pfx_mmap_region+0x10/0x10 [ 24.025061] ? security_mmap_addr+0x7d/0xa0 [ 24.025598] ? get_unmapped_area+0x1f5/0x3f0 [ 24.026157] do_mmap+0x854/0xf00 [ 24.026596] vm_mmap_pgoff+0x1a6/0x3a0 [ 24.027089] ? __pfx_vm_mmap_pgoff+0x10/0x10 [ 24.027668] ksys_mmap_pgoff+0x3af/0x500 [ 24.028186] do_syscall_64+0x3f/0x90 [ 24.028681] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 24.029334] RIP: 0033:0x7f3d85df0d82 [ 24.029798] 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 [ 24.031931] RSP: 002b:00007ffe72ed6848 EFLAGS: 00000206 ORIG_RAX: 0000000000000009 [ 24.032867] RAX: ffffffffffffffda RBX: 0000000000000812 RCX: 00007f3d85df0d82 [ 24.033717] RDX: 0000000000000005 RSI: 0000000000001000 RDI: 00007f3d8522a000 [ 24.034568] RBP: 00007f3d8522a000 R08: 0000000000000009 R09: 0000000000001000 [ 24.035417] R10: 0000000000000812 R11: 0000000000000206 R12: 0000565449a84d90 [ 24.036263] R13: 00007ffe72ed6860 R14: 00007ffe72ed6890 R15: 00007ffe72ed6bf0 [ 24.037178] [ 24.037470] [ 24.037697] Allocated by task 212: [ 24.038125] kasan_save_stack+0x22/0x50 [ 24.038626] kasan_set_track+0x25/0x30 [ 24.039121] __kasan_slab_alloc+0x59/0x70 [ 24.039646] kmem_cache_alloc+0x16b/0x370 [ 24.040168] vm_area_dup+0x20/0x160 [ 24.040678] __split_vma+0x170/0x950 [ 24.041153] split_vma+0xc6/0x110 [ 24.041598] mprotect_fixup+0x8d2/0xb30 [ 24.042102] do_mprotect_pkey+0x87e/0xd40 [ 24.042630] __x64_sys_mprotect+0x78/0xc0 [ 24.043159] do_syscall_64+0x3f/0x90 [ 24.043647] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 24.044294] [ 24.044511] Freed by task 212: [ 24.044918] kasan_save_stack+0x22/0x50 [ 24.045422] kasan_set_track+0x25/0x30 [ 24.045912] kasan_save_free_info+0x2b/0x50 [ 24.046439] __kasan_slab_free+0x10a/0x190 [ 24.046972] kmem_cache_free+0x10d/0x4d0 [ 24.047480] rcu_core+0x8c8/0x2860 [ 24.047928] __do_softirq+0x1b7/0x7d4 [ 24.048407] [ 24.048635] Last potentially related work creation: [ 24.049220] kasan_save_stack+0x22/0x50 [ 24.049723] __kasan_record_aux_stack+0x8e/0xa0 [ 24.050358] __call_rcu_common.constprop.0+0x6a/0xb90 [ 24.051012] remove_vma+0x139/0x170 [ 24.051460] do_vmi_align_munmap+0xd4a/0x11f0 [ 24.052011] do_vmi_munmap+0x1f1/0x2b0 [ 24.052498] __vm_munmap+0x138/0x3a0 [ 24.052984] __x64_sys_munmap+0x59/0x80 [ 24.053487] do_syscall_64+0x3f/0x90 [ 24.053963] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 24.054603] [ 24.054816] Second to last potentially related work creation: [ 24.055508] kasan_save_stack+0x22/0x50 [ 24.056018] __kasan_record_aux_stack+0x8e/0xa0 [ 24.056593] __call_rcu_common.constprop.0+0x6a/0xb90 [ 24.057250] remove_vma+0x139/0x170 [ 24.057717] do_vmi_align_munmap+0xd4a/0x11f0 [ 24.058284] do_vmi_munmap+0x1f1/0x2b0 [ 24.058774] mmap_region+0x1f9/0x2660 [ 24.059249] do_mmap+0x854/0xf00 [ 24.059712] vm_mmap_pgoff+0x1a6/0x3a0 [ 24.060217] ksys_mmap_pgoff+0x3af/0x500 [ 24.060769] do_syscall_64+0x3f/0x90 [ 24.061289] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 24.061941] [ 24.062159] The buggy address belongs to the object at ffff88800e0271d0 [ 24.062159] which belongs to the cache vm_area_struct of size 168 [ 24.063632] The buggy address is located 88 bytes inside of [ 24.063632] freed 168-byte region [ffff88800e0271d0, ffff88800e027278) [ 24.065164] [ 24.065382] The buggy address belongs to the physical page: [ 24.066031] page:000000005d290fc5 refcount:1 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0xe027 [ 24.067121] memcg:ffff88800f657b01 [ 24.067550] flags: 0x100000000000200(slab|node=0|zone=1) [ 24.068193] page_type: 0xffffffff() [ 24.068654] raw: 0100000000000200 ffff8880087a0c80 ffffea00003731c0 dead000000000006 [ 24.069593] raw: 0000000000000000 0000000000110011 00000001ffffffff ffff88800f657b01 [ 24.070533] page dumped because: kasan: bad access detected [ 24.071199] [ 24.071416] Memory state around the buggy address: [ 24.072037] ffff88800e027100: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb [ 24.072964] ffff88800e027180: fb fb fc fc fc fc fc fc fc fc fa fb fb fb fb fb [ 24.073890] >ffff88800e027200: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fc [ 24.074780] ^ [ 24.075394] ffff88800e027280: fc fc fc fc fc fc fc fa fb fb fb fb fb fb fb fb [ 24.076239] ffff88800e027300: fb fb fb fb fb fb fb fb fb fb fb fb fc fc fc fc [ 24.077094] ================================================================== [ 24.078107] Disabling lock debugging due to kernel taint [ 26.194611] BUG: Bad rss-counter state mm:00000000d6fa4285 type:MM_FILEPAGES val:33 [ 26.195589] BUG: Bad rss-counter state mm:00000000d6fa4285 type:MM_ANONPAGES val:22 [ 26.607050] BUG: Bad rss-counter state mm:0000000048c267ce type:MM_FILEPAGES val:33 [ 26.608233] BUG: Bad rss-counter state mm:0000000048c267ce type:MM_ANONPAGES val:22 Warning: Permanently added '[localhost]:5532' (ECDSA) to the list of known hosts. 2023/06/20 18:37:10 fuzzer started 2023/06/20 18:37:10 dialing manager at localhost:36067 2023/06/20 18:37:10 checking machine... 2023/06/20 18:37:10 checking revisions... [ 27.317236] kmemleak: Automatic memory scanning thread ended 2023/06/20 18:37:10 testing simple program... [ 27.369759] cgroup: Unknown subsys name 'net' [ 27.426124] cgroup: Unknown subsys name 'rlimit' executing program executing program executing program VM DIAGNOSIS: 18:37:09 Registers: info registers vcpu 0 RAX=dffffc0000000000 RBX=ffffffff813782f8 RCX=0000000000000001 RDX=1ffff1100d9c135e RSI=ffff88806ce09e58 RDI=ffffffff813782f8 RBP=ffff88806ce09af0 RSP=ffff88806ce09a68 R8 =0000000000000001 R9 =ffff88806ce09ad8 R10=0000000000038001 R11=0000000000020cbd R12=ffff88806ce09b60 R13=0000000000000000 R14=ffff888016a19b40 R15=ffff8880195bc0b8 RIP=ffffffff811fc7a0 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 00007f9aae409700 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=00007f7f8911e0b0 CR3=000000000c614000 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=2039303a37333a3831203032206e754a XMM01=73732878696e755f6d6170203a5d3832 XMM02=65736f6c63206e6f6973736573203a29 XMM03=755f6d6170203a5d3832325b64687373 XMM04=69662068637573206f4e203a656c6163 XMM05=3a656c696620766e65206e65706f206f XMM06=65733a6468737328766e655f6d617020 XMM07=6b7a79732039303a37333a3831203032 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=00007f43d1b3aa80 CR3=000000000cc1a000 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=fc5c81745db387b0db4f90a3c8b1cf9d XMM02=000000000011a3b8eff9b2d0a8fce9cb XMM03=000000000011a4882c67c8bc2e329bc3 XMM04=f306b2f4394bac0d00000000000ae988 XMM05=dfcdbad4f1609c370000000000132870 XMM06=84429a65f45db4d10000000000131a48 XMM07=e042d86d42eb936e0000000000121988 XMM08=4df4026df5ecad66000000000011a488 XMM09=00000000000000000000000000000000 XMM10=20200000000020202020202020200000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000