[ 24.295252] BUG: Bad rss-counter state mm:00000000a0fc076b type:MM_FILEPAGES val:33 [ 24.296638] BUG: Bad rss-counter state mm:00000000a0fc076b type:MM_ANONPAGES val:22 [ 24.444953] ================================================================== [ 24.445869] BUG: KASAN: slab-use-after-free in vma_interval_tree_remove+0xc75/0xec0 [ 24.446827] Read of size 8 at addr ffff88800949b228 by task sshd/220 [ 24.447597] [ 24.447815] CPU: 1 PID: 220 Comm: sshd Not tainted 6.4.0-rc7-next-20230620 #1 [ 24.448892] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS 1.12.0-1 04/01/2014 [ 24.449881] Call Trace: [ 24.450201] [ 24.450548] dump_stack_lvl+0x91/0xf0 [ 24.451077] print_report+0xcc/0x620 [ 24.451598] ? __virt_addr_valid+0x102/0x340 [ 24.452254] ? vma_interval_tree_remove+0xc75/0xec0 [ 24.452994] ? vma_interval_tree_remove+0xc75/0xec0 [ 24.453740] kasan_report+0xbe/0xf0 [ 24.454304] ? vma_interval_tree_remove+0xc75/0xec0 [ 24.455075] vma_interval_tree_remove+0xc75/0xec0 [ 24.455804] vma_prepare+0xc54/0x11a0 [ 24.456387] __split_vma+0x5af/0x950 [ 24.456972] ? __pfx___split_vma+0x10/0x10 [ 24.457610] ? find_held_lock+0x2c/0x110 [ 24.458240] do_vmi_align_munmap+0x2ba/0x11f0 [ 24.458936] ? lock_is_held_type+0x9f/0x120 [ 24.459601] ? __pfx_do_vmi_align_munmap+0x10/0x10 [ 24.460339] ? mtree_range_walk+0x632/0x900 [ 24.461015] ? mas_walk+0x5c7/0x7c0 [ 24.461594] do_vmi_munmap+0x1f1/0x2b0 [ 24.462201] mmap_region+0x1f9/0x2660 [ 24.462807] ? vm_mmap_pgoff+0x15c/0x3a0 [ 24.463423] ? __pfx_arch_get_unmapped_area_topdown+0x10/0x10 [ 24.464167] ? __pfx_lock_acquire+0x10/0x10 [ 24.464710] ? __pfx_mmap_region+0x10/0x10 [ 24.465253] ? security_mmap_addr+0x7d/0xa0 [ 24.465802] ? get_unmapped_area+0x1f5/0x3f0 [ 24.466366] do_mmap+0x854/0xf00 [ 24.466826] vm_mmap_pgoff+0x1a6/0x3a0 [ 24.467327] ? __pfx_vm_mmap_pgoff+0x10/0x10 [ 24.467897] ksys_mmap_pgoff+0x3af/0x500 [ 24.468417] do_syscall_64+0x3f/0x90 [ 24.468910] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 24.469573] RIP: 0033:0x7fe9b3942d82 [ 24.470032] 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 [ 24.472240] RSP: 002b:00007ffcc43ab8d8 EFLAGS: 00000206 ORIG_RAX: 0000000000000009 [ 24.473162] RAX: ffffffffffffffda RBX: 0000000000000812 RCX: 00007fe9b3942d82 [ 24.474020] RDX: 0000000000000005 RSI: 0000000000001000 RDI: 00007fe9b2d7c000 [ 24.474900] RBP: 00007fe9b2d7c000 R08: 0000000000000009 R09: 0000000000001000 [ 24.475773] R10: 0000000000000812 R11: 0000000000000206 R12: 000055f8e8626f60 [ 24.476638] R13: 00007ffcc43ab8f0 R14: 00007ffcc43ab920 R15: 00007ffcc43abc80 [ 24.477501] [ 24.477811] [ 24.478040] Allocated by task 211: [ 24.478482] kasan_save_stack+0x22/0x50 [ 24.479018] kasan_set_track+0x25/0x30 [ 24.479517] __kasan_slab_alloc+0x59/0x70 [ 24.480052] kmem_cache_alloc+0x16b/0x370 [ 24.480588] vm_area_dup+0x20/0x160 [ 24.481044] __split_vma+0x170/0x950 [ 24.481524] split_vma+0xc6/0x110 [ 24.481963] mprotect_fixup+0x8d2/0xb30 [ 24.482466] do_mprotect_pkey+0x87e/0xd40 [ 24.483003] __x64_sys_mprotect+0x78/0xc0 [ 24.483546] do_syscall_64+0x3f/0x90 [ 24.484028] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 24.484689] [ 24.484911] Freed by task 211: [ 24.485312] kasan_save_stack+0x22/0x50 [ 24.485822] kasan_set_track+0x25/0x30 [ 24.486330] kasan_save_free_info+0x2b/0x50 [ 24.486940] __kasan_slab_free+0x10a/0x190 [ 24.487486] kmem_cache_free+0x10d/0x4d0 [ 24.488004] rcu_core+0x8c8/0x2860 [ 24.488457] __do_softirq+0x1b7/0x7d4 [ 24.488964] [ 24.489191] Last potentially related work creation: [ 24.489872] kasan_save_stack+0x22/0x50 [ 24.490403] __kasan_record_aux_stack+0x8e/0xa0 [ 24.491006] __call_rcu_common.constprop.0+0x6a/0xb90 [ 24.491661] remove_vma+0x139/0x170 [ 24.492113] do_vmi_align_munmap+0xd4a/0x11f0 [ 24.492678] do_vmi_munmap+0x1f1/0x2b0 [ 24.493174] __vm_munmap+0x138/0x3a0 [ 24.493651] __x64_sys_munmap+0x59/0x80 [ 24.494162] do_syscall_64+0x3f/0x90 [ 24.494658] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 24.495335] [ 24.495552] Second to last potentially related work creation: [ 24.496265] kasan_save_stack+0x22/0x50 [ 24.496799] __kasan_record_aux_stack+0x8e/0xa0 [ 24.497384] __call_rcu_common.constprop.0+0x6a/0xb90 [ 24.498036] remove_vma+0x139/0x170 [ 24.498505] do_vmi_align_munmap+0xd4a/0x11f0 [ 24.499097] do_vmi_munmap+0x1f1/0x2b0 [ 24.499593] mmap_region+0x1f9/0x2660 [ 24.500086] do_mmap+0x854/0xf00 [ 24.500528] vm_mmap_pgoff+0x1a6/0x3a0 [ 24.501028] ksys_mmap_pgoff+0x3af/0x500 [ 24.501548] do_syscall_64+0x3f/0x90 [ 24.502034] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 24.502704] [ 24.502926] The buggy address belongs to the object at ffff88800949b1d0 [ 24.502926] which belongs to the cache vm_area_struct of size 168 [ 24.504430] The buggy address is located 88 bytes inside of [ 24.504430] freed 168-byte region [ffff88800949b1d0, ffff88800949b278) [ 24.505879] [ 24.506100] The buggy address belongs to the physical page: [ 24.506790] page:000000004f643f43 refcount:1 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0x949b [ 24.507889] memcg:ffff88800ef11801 [ 24.508330] anon flags: 0x100000000000200(slab|node=0|zone=1) [ 24.509051] page_type: 0xffffffff() [ 24.509504] raw: 0100000000000200 ffff8880087a0c80 ffffea0000406880 dead000000000005 [ 24.510455] raw: 0000000000000000 0000000000110011 00000001ffffffff ffff88800ef11801 [ 24.511419] page dumped because: kasan: bad access detected [ 24.512108] [ 24.512329] Memory state around the buggy address: [ 24.512918] ffff88800949b100: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb [ 24.513796] ffff88800949b180: fb fb fc fc fc fc fc fc fc fc fa fb fb fb fb fb [ 24.514697] >ffff88800949b200: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fc [ 24.515575] ^ [ 24.516134] ffff88800949b280: fc fc fc fc fc fc fc fa fb fb fb fb fb fb fb fb [ 24.516996] ffff88800949b300: fb fb fb fb fb fb fb fb fb fb fb fb fc fc fc fc [ 24.517866] ================================================================== [ 24.518914] Disabling lock debugging due to kernel taint Debian GNU/Linux 11 syzkaller ttyS0 syzkaller login: [ 26.629232] BUG: Bad rss-counter state mm:00000000a596ce21 type:MM_FILEPAGES val:33 [ 26.630897] BUG: Bad rss-counter state mm:00000000a596ce21 type:MM_ANONPAGES val:22 [ 27.177316] BUG: Bad rss-counter state mm:0000000079f2ca62 type:MM_FILEPAGES val:33 [ 27.178559] BUG: Bad rss-counter state mm:0000000079f2ca62 type:MM_ANONPAGES val:22 Warning: Permanently added '[localhost]:29852' (ECDSA) to the list of known hosts. 2023/06/21 10:32:22 fuzzer started 2023/06/21 10:32:23 dialing manager at localhost:36067 2023/06/21 10:32:23 checking machine... 2023/06/21 10:32:23 checking revisions... [ 27.924204] kmemleak: Automatic memory scanning thread ended 2023/06/21 10:32:23 testing simple program... [ 27.980608] cgroup: Unknown subsys name 'net' [ 28.057991] cgroup: Unknown subsys name 'rlimit' executing program executing program executing program VM DIAGNOSIS: 10:32:22 Registers: info registers vcpu 0 RAX=0000000000000000 RBX=ffff8880160fefa8 RCX=0000000000000000 RDX=ffff888014280000 RSI=ffffffff81b4cb51 RDI=ffff8880160fefa8 RBP=ffffea00006180c0 RSP=ffff88801427fac8 R8 =0000000000000005 R9 =0000000000000000 R10=0000000000000000 R11=00000000000b6d53 R12=0000000000000000 R13=ffff88801000c000 R14=0000000000000000 R15=ffff88801000c410 RIP=ffffffff81acb3a4 RFL=00000293 [--S-A-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 =0000 0000000000000000 00000000 00000000 DS =0000 0000000000000000 00000000 00000000 FS =0000 00007f3fe6d93900 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=00007f3fe61b0880 CR3=000000000c64e000 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=656e6e6f637369443d4547415353454d XMM01=2e303120746f6f722072657375206d6f XMM02=ffffffffffffffffffffffffffffffff XMM03=2f6c616e72756f6a2f676f6c2f6e7572 XMM04=68dd47b2e1cd96be00000000000ae988 XMM05=e8ea3f15869476250000000000133310 XMM06=40000e1bcd0899a50000000000132048 XMM07=00000000000000000000000000000000 XMM08=415453454d49545f454d49544c414552 XMM09=00000000000000000000000000000000 XMM10=20200000000020202020202020200000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000 info registers vcpu 1 RAX=0000000000000000 RBX=ffff88800f6d0f60 RCX=0000000000000000 RDX=ffff8880164a3680 RSI=0000000000000009 RDI=ffff88800f6d0f00 RBP=0000000000000009 RSP=ffff88800fd77df8 R8 =0000000000000004 R9 =0000000000000009 R10=0000000000000400 R11=00000000000b6a61 R12=ffff88800f6d0f00 R13=0000000000000040 R14=0000000000000000 R15=0000000000000400 RIP=ffffffff818e8d92 RFL=00000293 [--S-A-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 00007fa253338900 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=00007ffc87896000 CR3=000000000ebbc000 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=74696d7265705f6d61703d73726f746e XMM02=000000000000000000000000000000ff XMM03=5320444f4854454d5f54505952434e45 XMM04=40404040404040404040404040404040 XMM05=5a5a5a5a5a5a5a5a5a5a5a5a5a5a5a5a XMM06=20202020202020202020202020202020 XMM07=00000000000000000000000000000000 XMM08=61662029286e65706f5f746964756100 XMM09=00000000000000000000000000000000 XMM10=00000000000000000000000000000000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000