[ 29.881796] BUG: Bad rss-counter state mm:000000007617fdd8 type:MM_FILEPAGES val:33 [ 29.882432] BUG: Bad rss-counter state mm:000000007617fdd8 type:MM_ANONPAGES val:22 [ 30.010614] ================================================================== [ 30.011273] BUG: KASAN: slab-use-after-free in vma_interval_tree_remove+0xc75/0xec0 [ 30.011946] Read of size 8 at addr ffff88800e5ebb38 by task sshd/220 [ 30.012438] [ 30.012573] CPU: 0 PID: 220 Comm: sshd Not tainted 6.4.0-rc7-next-20230620 #1 [ 30.013185] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS 1.12.0-1 04/01/2014 [ 30.013821] Call Trace: [ 30.014395] [ 30.014661] dump_stack_lvl+0x91/0xf0 [ 30.015116] print_report+0xcc/0x620 [ 30.015422] ? __virt_addr_valid+0x102/0x340 [ 30.015977] ? vma_interval_tree_remove+0xc75/0xec0 [ 30.016380] ? vma_interval_tree_remove+0xc75/0xec0 [ 30.016872] kasan_report+0xbe/0xf0 [ 30.017172] ? vma_interval_tree_remove+0xc75/0xec0 [ 30.017545] vma_interval_tree_remove+0xc75/0xec0 [ 30.018043] vma_prepare+0xc54/0x11a0 [ 30.018341] __split_vma+0x5af/0x950 [ 30.018721] ? __pfx___split_vma+0x10/0x10 [ 30.019136] ? find_held_lock+0x2c/0x110 [ 30.019459] do_vmi_align_munmap+0x2ba/0x11f0 [ 30.019928] ? lock_is_held_type+0x9f/0x120 [ 30.020287] ? __pfx_do_vmi_align_munmap+0x10/0x10 [ 30.020657] ? mtree_range_walk+0x632/0x900 [ 30.021067] ? mas_walk+0x5c7/0x7c0 [ 30.021358] do_vmi_munmap+0x1f1/0x2b0 [ 30.021656] mmap_region+0x1f9/0x2660 [ 30.022041] ? vm_mmap_pgoff+0x15c/0x3a0 [ 30.022358] ? __pfx_arch_get_unmapped_area_topdown+0x10/0x10 [ 30.022988] ? __pfx_lock_acquire+0x10/0x10 [ 30.023315] ? __pfx_mmap_region+0x10/0x10 [ 30.023640] ? security_mmap_addr+0x7d/0xa0 [ 30.024034] ? get_unmapped_area+0x1f5/0x3f0 [ 30.024373] do_mmap+0x854/0xf00 [ 30.024640] vm_mmap_pgoff+0x1a6/0x3a0 [ 30.025019] ? __pfx_vm_mmap_pgoff+0x10/0x10 [ 30.025364] ksys_mmap_pgoff+0x3af/0x500 [ 30.025675] do_syscall_64+0x3f/0x90 [ 30.026015] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 30.026415] RIP: 0033:0x7fddadefed82 [ 30.026694] 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 [ 30.028158] RSP: 002b:00007ffda27f4968 EFLAGS: 00000206 ORIG_RAX: 0000000000000009 [ 30.028709] RAX: ffffffffffffffda RBX: 0000000000000812 RCX: 00007fddadefed82 [ 30.029274] RDX: 0000000000000005 RSI: 0000000000001000 RDI: 00007fddad338000 [ 30.029865] RBP: 00007fddad338000 R08: 0000000000000009 R09: 0000000000001000 [ 30.030384] R10: 0000000000000812 R11: 0000000000000206 R12: 000055d9fb41dec0 [ 30.030948] R13: 00007ffda27f4980 R14: 00007ffda27f49b0 R15: 00007ffda27f4d10 [ 30.031469] [ 30.031648] [ 30.031825] Allocated by task 213: [ 30.032209] kasan_save_stack+0x22/0x50 [ 30.032526] kasan_set_track+0x25/0x30 [ 30.032885] __kasan_slab_alloc+0x59/0x70 [ 30.033214] kmem_cache_alloc+0x16b/0x370 [ 30.033536] vm_area_dup+0x20/0x160 [ 30.033866] __split_vma+0x170/0x950 [ 30.034157] split_vma+0xc6/0x110 [ 30.034429] mprotect_fixup+0x8d2/0xb30 [ 30.034805] do_mprotect_pkey+0x87e/0xd40 [ 30.035146] __x64_sys_mprotect+0x78/0xc0 [ 30.035470] do_syscall_64+0x3f/0x90 [ 30.035814] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 30.036620] [ 30.036801] Freed by task 19: [ 30.037041] kasan_save_stack+0x22/0x50 [ 30.037354] kasan_set_track+0x25/0x30 [ 30.037661] kasan_save_free_info+0x2b/0x50 [ 30.038042] __kasan_slab_free+0x10a/0x190 [ 30.038376] kmem_cache_free+0x10d/0x4d0 [ 30.038692] rcu_core+0x8c8/0x2860 [ 30.039014] __do_softirq+0x1b7/0x7d4 [ 30.039317] [ 30.039452] Last potentially related work creation: [ 30.039918] kasan_save_stack+0x22/0x50 [ 30.040389] __kasan_record_aux_stack+0x8e/0xa0 [ 30.040796] __call_rcu_common.constprop.0+0x6a/0xb90 [ 30.041241] remove_vma+0x139/0x170 [ 30.041522] do_vmi_align_munmap+0xd4a/0x11f0 [ 30.041913] do_vmi_munmap+0x1f1/0x2b0 [ 30.042218] __vm_munmap+0x138/0x3a0 [ 30.042510] __x64_sys_munmap+0x59/0x80 [ 30.042865] do_syscall_64+0x3f/0x90 [ 30.043165] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 30.043572] [ 30.043708] Second to last potentially related work creation: [ 30.044298] kasan_save_stack+0x22/0x50 [ 30.044648] __kasan_record_aux_stack+0x8e/0xa0 [ 30.045128] __call_rcu_common.constprop.0+0x6a/0xb90 [ 30.045568] remove_vma+0x139/0x170 [ 30.045922] do_vmi_align_munmap+0xd4a/0x11f0 [ 30.046324] do_vmi_munmap+0x1f1/0x2b0 [ 30.046663] mmap_region+0x1f9/0x2660 [ 30.047039] do_mmap+0x854/0xf00 [ 30.047337] vm_mmap_pgoff+0x1a6/0x3a0 [ 30.047668] ksys_mmap_pgoff+0x7d/0x500 [ 30.048235] do_syscall_64+0x3f/0x90 [ 30.048547] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 30.049034] [ 30.049184] The buggy address belongs to the object at ffff88800e5ebae0 [ 30.049184] which belongs to the cache vm_area_struct of size 168 [ 30.050270] The buggy address is located 88 bytes inside of [ 30.050270] freed 168-byte region [ffff88800e5ebae0, ffff88800e5ebb88) [ 30.051283] [ 30.051429] The buggy address belongs to the physical page: [ 30.052455] page:000000002912e5b6 refcount:1 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0xe5eb [ 30.053258] memcg:ffff88800e74e601 [ 30.053553] flags: 0x100000000000200(slab|node=0|zone=1) [ 30.054029] page_type: 0xffffffff() [ 30.054325] raw: 0100000000000200 ffff8880087a0c80 dead000000000100 dead000000000122 [ 30.058787] raw: 0000000000000000 0000000000110011 00000001ffffffff ffff88800e74e601 [ 30.059371] page dumped because: kasan: bad access detected [ 30.059867] [ 30.060036] Memory state around the buggy address: [ 30.060405] ffff88800e5eba00: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 [ 30.060998] ffff88800e5eba80: 00 00 00 00 fc fc fc fc fc fc fc fc fa fb fb fb [ 30.061549] >ffff88800e5ebb00: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb [ 30.062125] ^ [ 30.062508] ffff88800e5ebb80: fb fc fc fc fc fc fc fc fc 00 00 00 00 00 00 00 [ 30.063174] ffff88800e5ebc00: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 fc fc [ 30.063718] ================================================================== [ 30.080310] Disabling lock debugging due to kernel taint Debian GNU/Linux 11 syzkaller ttyS0 syzkaller login: [ 33.512539] BUG: Bad rss-counter state mm:0000000094eb1ff2 type:MM_FILEPAGES val:33 [ 33.513199] BUG: Bad rss-counter state mm:0000000094eb1ff2 type:MM_ANONPAGES val:22 [ 34.546640] BUG: Bad rss-counter state mm:00000000c0170a46 type:MM_FILEPAGES val:33 [ 34.547324] BUG: Bad rss-counter state mm:00000000c0170a46 type:MM_ANONPAGES val:22 Warning: Permanently added '[localhost]:34005' (ECDSA) to the list of known hosts. 2023/06/21 10:24:27 fuzzer started 2023/06/21 10:24:28 dialing manager at localhost:36067 2023/06/21 10:24:28 checking machine... 2023/06/21 10:24:28 checking revisions... [ 35.461130] kmemleak: Automatic memory scanning thread ended 2023/06/21 10:24:28 testing simple program... [ 35.503216] cgroup: Unknown subsys name 'net' [ 35.572253] cgroup: Unknown subsys name 'rlimit' executing program executing program executing program VM DIAGNOSIS: 10:24:27 Registers: info registers vcpu 0 RAX=ffffffff8180c705 RBX=ffffffff813ad470 RCX=ffffffff86138e01 RDX=1ffff11002c4be82 RSI=ffffffff8180c705 RDI=ffff88801625f480 RBP=ffff88801625f450 RSP=ffff88801625f3b0 R8 =ffffffff86138e90 R9 =ffff88801625f3f8 R10=0000000000038001 R11=0000000000020d8f R12=ffff88801625f480 R13=0000000000000000 R14=ffff888017613680 R15=0000000000092cc0 RIP=ffffffff813ad474 RFL=00000286 [--S--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 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=00007f80ed434790 CR3=000000001610a000 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=0000000000000018fffffffe7ffbfeff XMM01=00000000000000020000561200000030 XMM02=00000000000000008000000000000006 XMM03=00000000000000000000000000000000 XMM04=00000000000000000000000000000000 XMM05=b4a1ad01d10574be0000000000000000 XMM06=a88a8271d45e8c427b2b85c6eba4990d XMM07=01f6009e46921bdfce595362d4dfdd09 XMM08=2520737365726464616e657473696c00 XMM09=00000000000000000000000000000000 XMM10=00000000000000000000000000000000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000 info registers vcpu 1 RAX=0000000080010001 RBX=0000000000010000 RCX=0000000000000000 RDX=ffff888008d951c0 RSI=ffffffff813bcfec RDI=0000000000000005 RBP=0000000000000000 RSP=ffff88806cf09dd0 R8 =0000000000000005 R9 =0000000000000000 R10=0000000000010000 R11=ffff88806cf09ff8 R12=ffffffffffffffea R13=ffff88806cf2c240 R14=ffff888008e07dc8 R15=dffffc0000000000 RIP=ffffffff814c0885 RFL=00000006 [-----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 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=00007f245b2afd80 CR3=000000000c80e000 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=ff000000000000000000000000000000 XMM02=00000000000000000000000000000000 XMM03=00000000000000000000000000000000 XMM04=adee3f3d3bb4f6c200000000001339a0 XMM05=d3fdd5f48436fbd700000000000aead0 XMM06=c491a370d1b2cae700000000000ae988 XMM07=a1fcdcf819d7e1e500000000000ae728 XMM08=44495f474f4c5359530069253d595449 XMM09=00000000000000000000000000000000 XMM10=00000000000000000000000000000000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000