[ 25.786388] BUG: Bad rss-counter state mm:00000000ba81f2c6 type:MM_FILEPAGES val:33 [ 25.787594] BUG: Bad rss-counter state mm:00000000ba81f2c6 type:MM_ANONPAGES val:22 [ 25.823983] ================================================================== [ 25.824896] BUG: KASAN: slab-use-after-free in vma_interval_tree_remove+0xc75/0xec0 [ 25.825774] Read of size 8 at addr ffff88801bc62df0 by task sshd/219 [ 25.826503] [ 25.826706] CPU: 0 PID: 219 Comm: sshd Not tainted 6.4.0-rc7-next-20230619 #1 [ 25.827519] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS 1.12.0-1 04/01/2014 [ 25.828426] Call Trace: [ 25.828726] [ 25.829020] dump_stack_lvl+0x91/0xf0 [ 25.829484] print_report+0xcc/0x620 [ 25.829937] ? __virt_addr_valid+0x102/0x340 [ 25.830453] ? vma_interval_tree_remove+0xc75/0xec0 [ 25.831033] ? vma_interval_tree_remove+0xc75/0xec0 [ 25.831611] kasan_report+0xbe/0xf0 [ 25.832052] ? vma_interval_tree_remove+0xc75/0xec0 [ 25.832643] vma_interval_tree_remove+0xc75/0xec0 [ 25.833226] vma_prepare+0xc54/0x11a0 [ 25.833682] __split_vma+0x5af/0x950 [ 25.834140] ? __pfx___split_vma+0x10/0x10 [ 25.834643] ? find_held_lock+0x2c/0x110 [ 25.835133] do_vmi_align_munmap+0x2ba/0x11f0 [ 25.835771] ? lock_is_held_type+0x9f/0x120 [ 25.836290] ? __pfx_do_vmi_align_munmap+0x10/0x10 [ 25.836889] ? mtree_range_walk+0x632/0x900 [ 25.837402] ? mas_walk+0x5c7/0x7c0 [ 25.837861] do_vmi_munmap+0x1f1/0x2b0 [ 25.838322] mmap_region+0x1f9/0x2660 [ 25.838783] ? vm_mmap_pgoff+0x15c/0x3a0 [ 25.839265] ? __pfx_arch_get_unmapped_area_topdown+0x10/0x10 [ 25.839931] ? __pfx_lock_acquire+0x10/0x10 [ 25.840435] ? __pfx_mmap_region+0x10/0x10 [ 25.840951] ? security_mmap_addr+0x7d/0xa0 [ 25.841451] ? get_unmapped_area+0x1f5/0x3f0 [ 25.841969] do_mmap+0x854/0xf00 [ 25.842389] vm_mmap_pgoff+0x1a6/0x3a0 [ 25.842860] ? __pfx_vm_mmap_pgoff+0x10/0x10 [ 25.843394] ksys_mmap_pgoff+0x3af/0x500 [ 25.843883] do_syscall_64+0x3f/0x90 [ 25.844335] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 25.844956] RIP: 0033:0x7f1640515d82 [ 25.845377] 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 [ 25.847385] RSP: 002b:00007fffd5f8d9b8 EFLAGS: 00000206 ORIG_RAX: 0000000000000009 [ 25.848243] RAX: ffffffffffffffda RBX: 0000000000000812 RCX: 00007f1640515d82 [ 25.849067] RDX: 0000000000000005 RSI: 0000000000001000 RDI: 00007f163f94f000 [ 25.849873] RBP: 00007f163f94f000 R08: 0000000000000009 R09: 0000000000001000 [ 25.850684] R10: 0000000000000812 R11: 0000000000000206 R12: 0000559a36913b20 [ 25.851498] R13: 00007fffd5f8d9d0 R14: 00007fffd5f8da00 R15: 00007fffd5f8dd60 [ 25.852309] [ 25.852585] [ 25.852788] Allocated by task 210: [ 25.853203] kasan_save_stack+0x22/0x50 [ 25.853679] kasan_set_track+0x25/0x30 [ 25.854145] __kasan_slab_alloc+0x59/0x70 [ 25.854636] kmem_cache_alloc+0x16b/0x370 [ 25.855118] vm_area_dup+0x20/0x160 [ 25.855536] __split_vma+0x170/0x950 [ 25.855967] split_vma+0xc6/0x110 [ 25.856378] mprotect_fixup+0x8d2/0xb30 [ 25.856862] do_mprotect_pkey+0x87e/0xd40 [ 25.857357] __x64_sys_mprotect+0x78/0xc0 [ 25.857843] do_syscall_64+0x3f/0x90 [ 25.858278] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 25.858879] [ 25.859076] Freed by task 210: [ 25.859440] kasan_save_stack+0x22/0x50 [ 25.859920] kasan_set_track+0x25/0x30 [ 25.860375] kasan_save_free_info+0x2b/0x50 [ 25.860886] __kasan_slab_free+0x10a/0x190 [ 25.861383] kmem_cache_free+0x10d/0x4d0 [ 25.861860] rcu_core+0x8c8/0x2860 [ 25.862280] __do_softirq+0x1b7/0x7d4 [ 25.862721] [ 25.862922] Last potentially related work creation: [ 25.863470] kasan_save_stack+0x22/0x50 [ 25.863949] __kasan_record_aux_stack+0x8e/0xa0 [ 25.864479] __call_rcu_common.constprop.0+0x6a/0xb90 [ 25.865086] remove_vma+0x139/0x170 [ 25.865516] do_vmi_align_munmap+0xd4a/0x11f0 [ 25.866042] do_vmi_munmap+0x1f1/0x2b0 [ 25.866500] __vm_munmap+0x138/0x3a0 [ 25.866941] __x64_sys_munmap+0x59/0x80 [ 25.867398] do_syscall_64+0x3f/0x90 [ 25.867835] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 25.868436] [ 25.868635] The buggy address belongs to the object at ffff88801bc62d98 [ 25.868635] which belongs to the cache vm_area_struct of size 168 [ 25.870035] The buggy address is located 88 bytes inside of [ 25.870035] freed 168-byte region [ffff88801bc62d98, ffff88801bc62e40) [ 25.871358] [ 25.871557] The buggy address belongs to the physical page: [ 25.872173] page:000000008078e592 refcount:1 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0x1bc62 [ 25.873204] memcg:ffff88801bc48501 [ 25.873601] flags: 0x100000000000200(slab|node=0|zone=1) [ 25.874200] page_type: 0xffffffff() [ 25.874612] raw: 0100000000000200 ffff88800879fc80 dead000000000122 0000000000000000 [ 25.875471] raw: 0000000000000000 0000000000110011 00000001ffffffff ffff88801bc48501 [ 25.876295] page dumped because: kasan: bad access detected [ 25.876918] [ 25.877125] Memory state around the buggy address: [ 25.877656] ffff88801bc62c80: fc fc fc fc fc fc 00 00 00 00 00 00 00 00 00 00 [ 25.878452] ffff88801bc62d00: 00 00 00 00 00 00 00 00 00 00 00 fc fc fc fc fc [ 25.879254] >ffff88801bc62d80: fc fc fc fa fb fb fb fb fb fb fb fb fb fb fb fb [ 25.880041] ^ [ 25.880792] ffff88801bc62e00: fb fb fb fb fb fb fb fb fc fc fc fc fc fc fc fc [ 25.881586] ffff88801bc62e80: fa fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb [ 25.882385] ================================================================== [ 25.883419] Disabling lock debugging due to kernel taint Debian GNU/Linux 11 syzkaller ttyS0 syzkaller login: [ 27.885817] BUG: Bad rss-counter state mm:000000007acb56a2 type:MM_FILEPAGES val:33 [ 27.886766] BUG: Bad rss-counter state mm:000000007acb56a2 type:MM_ANONPAGES val:22 [ 28.352961] BUG: Bad rss-counter state mm:000000000039c1de type:MM_FILEPAGES val:33 [ 28.354706] BUG: Bad rss-counter state mm:000000000039c1de type:MM_ANONPAGES val:22 Warning: Permanently added '[localhost]:41240' (ECDSA) to the list of known hosts. 2023/06/19 22:11:50 fuzzer started 2023/06/19 22:11:50 dialing manager at localhost:44161 2023/06/19 22:11:50 checking machine... 2023/06/19 22:11:50 checking revisions... [ 29.078421] kmemleak: Automatic memory scanning thread ended 2023/06/19 22:11:50 testing simple program... [ 29.134331] cgroup: Unknown subsys name 'net' [ 29.182421] cgroup: Unknown subsys name 'rlimit' executing program executing program executing program VM DIAGNOSIS: 22:11:48 Registers: info registers vcpu 0 RAX=0000000000000007 RBX=0000000000000000 RCX=0000000000000100 RDX=0000000000000000 RSI=ffffffff814c84fa RDI=ffffffff8542aab4 RBP=ffffffff8542a6c0 RSP=ffff88806ce099f8 R8 =0000000000000005 R9 =0000000000000000 R10=0000000000000000 R11=00000000000b5420 R12=ffffffff8542a6c0 R13=0000000000000000 R14=ffffffff85652a88 R15=ffff888019d1c540 RIP=ffffffff813744ea 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 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=00007f6f97638db0 CR3=000000000ebf0000 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=2039343a31313a3232203931206e754a XMM01=657463656e6e6f63736944203a5d3832 XMM02=302e303120746f6f722072657375206d XMM03=203a5d3832325b646873732072656c6c XMM04=69662068637573206f4e203a656c6163 XMM05=3a656c696620766e65206e65706f206f XMM06=65733a6468737328766e655f6d617020 XMM07=6b7a79732039343a31313a3232203931 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=ffffffff8450c50e RDX=ffffed100d9e6a01 RSI=0000000000000004 RDI=ffffffff812889a5 RBP=dffffc0000000000 RSP=ffff888008e27e70 R8 =0000000000000000 R9 =ffffed100d9e6a00 R10=ffff88806cf35003 R11=0000000000000001 R12=ffffffff85d3bed0 R13=1ffff110011c4fd3 R14=0000000000000000 R15=0000000000000000 RIP=ffffffff8450d49f 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=0000556af20d4768 CR3=000000000ebf0000 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=31313a3232203931206e754a3e38333c XMM01=6d6f72662064657463656e6e6f637369 XMM02=2e303120746f6f722072657375206d6f XMM03=3a5d3832325b646873732039343a3131 XMM04=6456774875434142334f726f59427469 XMM05=485320415352203a3268737320343136 XMM06=206d6f726620746f6f7220726f662079 XMM07=00000000000000000000000000000000 XMM08=3a677562656420676f6c737973720000 XMM09=00000000000000000000000000000000 XMM10=00000000000000000000000000000000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000