[ 31.348334] BUG: Bad rss-counter state mm:000000005020df61 type:MM_FILEPAGES val:33 [ 31.349689] BUG: Bad rss-counter state mm:000000005020df61 type:MM_ANONPAGES val:22 [ 31.499728] ================================================================== [ 31.500817] BUG: KASAN: slab-use-after-free in vma_interval_tree_remove+0xc75/0xec0 [ 31.502024] Read of size 8 at addr ffff88800e32d798 by task sshd/218 [ 31.502979] [ 31.503239] CPU: 1 PID: 218 Comm: sshd Not tainted 6.4.0-rc7-next-20230620 #1 [ 31.504090] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS 1.12.0-1 04/01/2014 [ 31.505065] Call Trace: [ 31.505381] [ 31.505662] dump_stack_lvl+0x91/0xf0 [ 31.506154] print_report+0xcc/0x620 [ 31.506634] ? __virt_addr_valid+0x102/0x340 [ 31.507218] ? vma_interval_tree_remove+0xc75/0xec0 [ 31.507834] ? vma_interval_tree_remove+0xc75/0xec0 [ 31.508449] kasan_report+0xbe/0xf0 [ 31.508920] ? vma_interval_tree_remove+0xc75/0xec0 [ 31.509535] vma_interval_tree_remove+0xc75/0xec0 [ 31.510129] vma_prepare+0xc54/0x11a0 [ 31.510605] __split_vma+0x5af/0x950 [ 31.511077] ? __pfx___split_vma+0x10/0x10 [ 31.511603] ? find_held_lock+0x2c/0x110 [ 31.512118] do_vmi_align_munmap+0x2ba/0x11f0 [ 31.512676] ? lock_is_held_type+0x9f/0x120 [ 31.513213] ? __pfx_do_vmi_align_munmap+0x10/0x10 [ 31.513811] ? mtree_range_walk+0x632/0x900 [ 31.514365] ? mas_walk+0x5c7/0x7c0 [ 31.514860] do_vmi_munmap+0x1f1/0x2b0 [ 31.515354] mmap_region+0x1f9/0x2660 [ 31.515832] ? vm_mmap_pgoff+0x15c/0x3a0 [ 31.516343] ? __pfx_arch_get_unmapped_area_topdown+0x10/0x10 [ 31.517047] ? __pfx_lock_acquire+0x10/0x10 [ 31.517581] ? __pfx_mmap_region+0x10/0x10 [ 31.518108] ? security_mmap_addr+0x7d/0xa0 [ 31.518641] ? get_unmapped_area+0x1f5/0x3f0 [ 31.519212] do_mmap+0x854/0xf00 [ 31.519660] vm_mmap_pgoff+0x1a6/0x3a0 [ 31.520153] ? __pfx_vm_mmap_pgoff+0x10/0x10 [ 31.520717] ksys_mmap_pgoff+0x3af/0x500 [ 31.521230] do_syscall_64+0x3f/0x90 [ 31.521705] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 31.522350] RIP: 0033:0x7f2ed8876d82 [ 31.522820] 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 [ 31.524924] RSP: 002b:00007ffe6fc994f8 EFLAGS: 00000206 ORIG_RAX: 0000000000000009 [ 31.525825] RAX: ffffffffffffffda RBX: 0000000000000812 RCX: 00007f2ed8876d82 [ 31.526655] RDX: 0000000000000005 RSI: 0000000000001000 RDI: 00007f2ed7cb0000 [ 31.527513] RBP: 00007f2ed7cb0000 R08: 0000000000000009 R09: 0000000000001000 [ 31.528350] R10: 0000000000000812 R11: 0000000000000206 R12: 000055cae075fec0 [ 31.529188] R13: 00007ffe6fc99510 R14: 00007ffe6fc99540 R15: 00007ffe6fc998a0 [ 31.530041] [ 31.530334] [ 31.530557] Allocated by task 210: [ 31.530993] kasan_save_stack+0x22/0x50 [ 31.531498] kasan_set_track+0x25/0x30 [ 31.531985] __kasan_slab_alloc+0x59/0x70 [ 31.532510] kmem_cache_alloc+0x16b/0x370 [ 31.533021] vm_area_dup+0x20/0x160 [ 31.533476] __split_vma+0x170/0x950 [ 31.533937] split_vma+0xc6/0x110 [ 31.534376] mprotect_fixup+0x8d2/0xb30 [ 31.534894] do_mprotect_pkey+0x87e/0xd40 [ 31.535422] __x64_sys_mprotect+0x78/0xc0 [ 31.535940] do_syscall_64+0x3f/0x90 [ 31.536416] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 31.537054] [ 31.537272] Freed by task 210: [ 31.537670] kasan_save_stack+0x22/0x50 [ 31.538165] kasan_set_track+0x25/0x30 [ 31.538652] kasan_save_free_info+0x2b/0x50 [ 31.539192] __kasan_slab_free+0x10a/0x190 [ 31.539719] kmem_cache_free+0x10d/0x4d0 [ 31.540225] rcu_core+0x8c8/0x2860 [ 31.540668] __do_softirq+0x1b7/0x7d4 [ 31.541153] [ 31.541365] Last potentially related work creation: [ 31.541946] kasan_save_stack+0x22/0x50 [ 31.542442] __kasan_record_aux_stack+0x8e/0xa0 [ 31.543028] __call_rcu_common.constprop.0+0x6a/0xb90 [ 31.543723] remove_vma+0x139/0x170 [ 31.544176] do_vmi_align_munmap+0xd4a/0x11f0 [ 31.544744] do_vmi_munmap+0x1f1/0x2b0 [ 31.545229] __vm_munmap+0x138/0x3a0 [ 31.545691] __x64_sys_munmap+0x59/0x80 [ 31.546181] do_syscall_64+0x3f/0x90 [ 31.546653] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 31.547297] [ 31.547516] The buggy address belongs to the object at ffff88800e32d740 [ 31.547516] which belongs to the cache vm_area_struct of size 168 [ 31.548969] The buggy address is located 88 bytes inside of [ 31.548969] freed 168-byte region [ffff88800e32d740, ffff88800e32d7e8) [ 31.550372] [ 31.550590] The buggy address belongs to the physical page: [ 31.551264] page:000000008ec0eb15 refcount:1 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0xe32d [ 31.552332] memcg:ffff88800d9d9e01 [ 31.552752] flags: 0x100000000000200(slab|node=0|zone=1) [ 31.553434] page_type: 0xffffffff() [ 31.553897] raw: 0100000000000200 ffff8880087a0c80 ffffea00003b2f80 dead000000000002 [ 31.554843] raw: 0000000000000000 0000000000110011 00000001ffffffff ffff88800d9d9e01 [ 31.555833] page dumped because: kasan: bad access detected [ 31.556495] [ 31.556714] Memory state around the buggy address: [ 31.557327] ffff88800e32d680: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 [ 31.558228] ffff88800e32d700: fc fc fc fc fc fc fc fc fa fb fb fb fb fb fb fb [ 31.559129] >ffff88800e32d780: fb fb fb fb fb fb fb fb fb fb fb fb fb fc fc fc [ 31.560002] ^ [ 31.560524] ffff88800e32d800: fc fc fc fc fc fa fb fb fb fb fb fb fb fb fb fb [ 31.561398] ffff88800e32d880: fb fb fb fb fb fb fb fb fb fb fc fc fc fc fc fc [ 31.562262] ================================================================== [ 31.563431] Disabling lock debugging due to kernel taint Debian GNU/Linux 11 syzkaller ttyS0 syzkaller login: [ 33.675402] BUG: Bad rss-counter state mm:00000000842401b2 type:MM_FILEPAGES val:33 [ 33.676605] BUG: Bad rss-counter state mm:00000000842401b2 type:MM_ANONPAGES val:22 [ 34.085197] BUG: Bad rss-counter state mm:0000000099fdf012 type:MM_FILEPAGES val:33 [ 34.086235] BUG: Bad rss-counter state mm:0000000099fdf012 type:MM_ANONPAGES val:22 Warning: Permanently added '[localhost]:15646' (ECDSA) to the list of known hosts. 2023/06/20 12:47:01 fuzzer started 2023/06/20 12:47:02 dialing manager at localhost:36067 2023/06/20 12:47:02 checking machine... 2023/06/20 12:47:02 checking revisions... [ 34.780194] kmemleak: Automatic memory scanning thread ended 2023/06/20 12:47:02 testing simple program... [ 34.824563] cgroup: Unknown subsys name 'net' [ 34.888286] cgroup: Unknown subsys name 'rlimit' executing program executing program executing program VM DIAGNOSIS: 12:47:01 Registers: info registers vcpu 0 RAX=ffff88806ce361f4 RBX=00000000000361a0 RCX=00000000fffff938 RDX=0000000000000007 RSI=ffff88807ffdc000 RDI=ffffffff81839900 RBP=ffff888019247e00 RSP=ffff88806ce09db8 R8 =ffff88806ce361a0 R9 =ffffffff87b6a200 R10=ffff88806ce361e8 R11=00000000000b6a61 R12=ffff88807ffdc000 R13=0000000000000005 R14=00000000fffffab8 R15=0000000000000000 RIP=ffffffff81839c20 RFL=00000083 [--S---C] 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 00007ff7d23eb900 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=00007fc0db9965d0 CR3=000000001bf14000 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=ff0000000000ffff0000000000ff0000 XMM02=ff000000000000ff0000000000ff0000 XMM03=66207463656e6e6f6373696420646576 XMM04=00000000000000000000000000000000 XMM05=00000000000000000000000000000000 XMM06=0d0c0f0e09080b0a0504070601000302 XMM07=00000000000000000000000000000000 XMM08=000a0d732a2e25006c61746166003367 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=00007ffee0027d18 CR3=0000000013a98000 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=2031303a37343a3231203032206e754a XMM01=657463656e6e6f63736944203a5d3732 XMM02=302e303120746f6f722072657375206d XMM03=203a5d3732325b646873732072656c6c XMM04=69662068637573206f4e203a656c6163 XMM05=3a656c696620766e65206e65706f206f XMM06=65733a6468737328766e655f6d617020 XMM07=6b7a79732031303a37343a3231203032 XMM08=3d656e696c646d632022656369767265 XMM09=00000000000000000000000000000000 XMM10=00000000000000000000000000000000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000