[ 30.268172] BUG: Bad rss-counter state mm:00000000ec6f49d0 type:MM_FILEPAGES val:33 [ 30.269234] BUG: Bad rss-counter state mm:00000000ec6f49d0 type:MM_ANONPAGES val:22 Debian GNU/Linux 11 syzkaller ttyS0 syzkaller login: [ 30.440242] ================================================================== [ 30.441261] BUG: KASAN: slab-use-after-free in vma_interval_tree_remove+0xc75/0xec0 [ 30.442311] Read of size 8 at addr ffff88800ea44b38 by task sshd/219 [ 30.443303] [ 30.443543] CPU: 1 PID: 219 Comm: sshd Not tainted 6.4.0-rc7-next-20230620 #1 [ 30.444509] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS 1.12.0-1 04/01/2014 [ 30.445622] Call Trace: [ 30.445976] [ 30.446283] dump_stack_lvl+0x91/0xf0 [ 30.446825] print_report+0xcc/0x620 [ 30.447362] ? __virt_addr_valid+0x102/0x340 [ 30.447972] ? vma_interval_tree_remove+0xc75/0xec0 [ 30.448666] ? vma_interval_tree_remove+0xc75/0xec0 [ 30.449351] kasan_report+0xbe/0xf0 [ 30.449879] ? vma_interval_tree_remove+0xc75/0xec0 [ 30.450576] vma_interval_tree_remove+0xc75/0xec0 [ 30.451239] vma_prepare+0xc54/0x11a0 [ 30.451768] __split_vma+0x5af/0x950 [ 30.452289] ? __pfx___split_vma+0x10/0x10 [ 30.452880] ? find_held_lock+0x2c/0x110 [ 30.453425] do_vmi_align_munmap+0x2ba/0x11f0 [ 30.454022] ? lock_is_held_type+0x9f/0x120 [ 30.454585] ? __pfx_do_vmi_align_munmap+0x10/0x10 [ 30.455221] ? mtree_range_walk+0x632/0x900 [ 30.455805] ? mas_walk+0x5c7/0x7c0 [ 30.456305] do_vmi_munmap+0x1f1/0x2b0 [ 30.456844] mmap_region+0x1f9/0x2660 [ 30.457355] ? vm_mmap_pgoff+0x15c/0x3a0 [ 30.457895] ? __pfx_arch_get_unmapped_area_topdown+0x10/0x10 [ 30.458644] ? __pfx_lock_acquire+0x10/0x10 [ 30.459203] ? __pfx_mmap_region+0x10/0x10 [ 30.459758] ? security_mmap_addr+0x7d/0xa0 [ 30.460321] ? get_unmapped_area+0x1f5/0x3f0 [ 30.460918] do_mmap+0x854/0xf00 [ 30.461379] vm_mmap_pgoff+0x1a6/0x3a0 [ 30.461899] ? __pfx_vm_mmap_pgoff+0x10/0x10 [ 30.462494] ksys_mmap_pgoff+0x3af/0x500 [ 30.463031] do_syscall_64+0x3f/0x90 [ 30.463535] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 30.464214] RIP: 0033:0x7f32c0778d82 [ 30.464696] 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 [ 30.466892] RSP: 002b:00007fffe523ac98 EFLAGS: 00000206 ORIG_RAX: 0000000000000009 [ 30.467821] RAX: ffffffffffffffda RBX: 0000000000000812 RCX: 00007f32c0778d82 [ 30.468708] RDX: 0000000000000005 RSI: 0000000000001000 RDI: 00007f32bfbb2000 [ 30.469580] RBP: 00007f32bfbb2000 R08: 0000000000000009 R09: 0000000000001000 [ 30.470455] R10: 0000000000000812 R11: 0000000000000206 R12: 0000563045d2fb20 [ 30.471325] R13: 00007fffe523acb0 R14: 00007fffe523ace0 R15: 00007fffe523b040 [ 30.472205] [ 30.472515] [ 30.472737] Allocated by task 212: [ 30.473183] kasan_save_stack+0x22/0x50 [ 30.473704] kasan_set_track+0x25/0x30 [ 30.474232] __kasan_slab_alloc+0x59/0x70 [ 30.474802] kmem_cache_alloc+0x16b/0x370 [ 30.475357] vm_area_dup+0x20/0x160 [ 30.475844] __split_vma+0x170/0x950 [ 30.476349] split_vma+0xc6/0x110 [ 30.476843] mprotect_fixup+0x8d2/0xb30 [ 30.477387] do_mprotect_pkey+0x87e/0xd40 [ 30.477951] __x64_sys_mprotect+0x78/0xc0 [ 30.478520] do_syscall_64+0x3f/0x90 [ 30.479019] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 30.479710] [ 30.479945] Freed by task 212: [ 30.480360] kasan_save_stack+0x22/0x50 [ 30.480907] kasan_set_track+0x25/0x30 [ 30.481437] kasan_save_free_info+0x2b/0x50 [ 30.482017] __kasan_slab_free+0x10a/0x190 [ 30.482598] kmem_cache_free+0x10d/0x4d0 [ 30.483146] rcu_core+0x8c8/0x2860 [ 30.483604] __do_softirq+0x1b7/0x7d4 [ 30.484094] [ 30.484390] Last potentially related work creation: [ 30.484998] kasan_save_stack+0x22/0x50 [ 30.485514] __kasan_record_aux_stack+0x8e/0xa0 [ 30.486104] __call_rcu_common.constprop.0+0x6a/0xb90 [ 30.486784] remove_vma+0x139/0x170 [ 30.487258] do_vmi_align_munmap+0xd4a/0x11f0 [ 30.487859] do_vmi_munmap+0x1f1/0x2b0 [ 30.488389] __vm_munmap+0x138/0x3a0 [ 30.488904] __x64_sys_munmap+0x59/0x80 [ 30.489464] do_syscall_64+0x3f/0x90 [ 30.489957] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 30.490624] [ 30.490848] The buggy address belongs to the object at ffff88800ea44ae0 [ 30.490848] which belongs to the cache vm_area_struct of size 168 [ 30.492439] The buggy address is located 88 bytes inside of [ 30.492439] freed 168-byte region [ffff88800ea44ae0, ffff88800ea44b88) [ 30.493883] [ 30.494105] The buggy address belongs to the physical page: [ 30.494794] page:000000004860b75c refcount:1 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0xea44 [ 30.495911] memcg:ffff88800c8b2201 [ 30.496352] flags: 0x100000000000200(slab|node=0|zone=1) [ 30.497039] page_type: 0xffffffff() [ 30.497506] raw: 0100000000000200 ffff8880087a0c80 dead000000000100 dead000000000122 [ 30.498462] raw: 0000000000000000 0000000000110011 00000001ffffffff ffff88800c8b2201 [ 30.499397] page dumped because: kasan: bad access detected [ 30.500083] [ 30.500301] Memory state around the buggy address: [ 30.500917] ffff88800ea44a00: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 [ 30.501807] ffff88800ea44a80: 00 00 00 00 fc fc fc fc fc fc fc fc fa fb fb fb [ 30.502694] >ffff88800ea44b00: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb [ 30.503551] ^ [ 30.504166] ffff88800ea44b80: fb fc fc fc fc fc fc fc fc 00 00 00 00 00 00 00 [ 30.505073] ffff88800ea44c00: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 fc fc [ 30.505925] ================================================================== [ 30.506882] Disabling lock debugging due to kernel taint [ 32.437913] BUG: Bad rss-counter state mm:0000000060c8409b type:MM_FILEPAGES val:33 [ 32.439149] BUG: Bad rss-counter state mm:0000000060c8409b type:MM_ANONPAGES val:22 [ 33.012400] BUG: Bad rss-counter state mm:000000004fcd8f30 type:MM_FILEPAGES val:33 [ 33.013620] BUG: Bad rss-counter state mm:000000004fcd8f30 type:MM_ANONPAGES val:22 Warning: Permanently added '[localhost]:14746' (ECDSA) to the list of known hosts. 2023/06/21 01:23:58 fuzzer started 2023/06/21 01:23:58 dialing manager at localhost:36067 2023/06/21 01:23:58 checking machine... 2023/06/21 01:23:58 checking revisions... [ 33.652873] kmemleak: Automatic memory scanning thread ended 2023/06/21 01:23:59 testing simple program... [ 33.700982] cgroup: Unknown subsys name 'net' [ 33.774732] cgroup: Unknown subsys name 'rlimit' executing program executing program executing program VM DIAGNOSIS: 01:23:58 Registers: info registers vcpu 0 RAX=0000000080000001 RBX=00000000000000a0 RCX=ffffffff81b2ad8a RDX=00000000000000a0 RSI=0000000000000097 RDI=0000000000000005 RBP=ffff888019a02068 RSP=ffff88800e997840 R8 =0000000000000005 R9 =0000000000000097 R10=00000000000000a0 R11=00000000000b6a61 R12=ffff8880196fdd00 R13=ffff888019a02528 R14=ffff888019a01e08 R15=0000000000000000 RIP=ffffffff814c0250 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 00007f5c4688e700 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=00007ffd80a64d18 CR3=0000000018d9e000 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=2038353a33323a3130203132206e754a XMM01=73732878696e755f6d6170203a5d3832 XMM02=65736f6c63206e6f6973736573203a29 XMM03=755f6d6170203a5d3832325b64687373 XMM04=69662068637573206f4e203a656c6163 XMM05=3a656c696620766e65206e65706f206f XMM06=65733a6468737328766e655f6d617020 XMM07=6b7a79732038353a33323a3130203132 XMM08=3d656e696c646d632022656369767265 XMM09=00000000000000000000000000000000 XMM10=00000000000000000000000000000000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000 info registers vcpu 1 RAX=0000000000000000 RBX=ffffffff85dfdcb8 RCX=ffffffff81809a90 RDX=0000000000000000 RSI=ffffffff86138976 RDI=ffffffff85dfdcb8 RBP=ffffffff85dfdcb8 RSP=ffff88806cf099b8 R8 =ffffffff86138976 R9 =ffff88806cf09ab0 R10=0000000000038001 R11=0000000000020cbd R12=ffffffff85dfdcb8 R13=ffffffff85dfdcb8 R14=ffffffff85dfdcb8 R15=dffffc0000000000 RIP=ffffffff8112fc73 RFL=00000256 [---ZAP-] 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 00007f5d4e8b9900 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=00007f5d4ee70618 CR3=000000000cb1a000 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=6e69676f6c5f6d61702c78756e696c65 XMM02=755f6d61702c74696d7265705f6d6170 XMM03=2c766e655f6d61702c7374696d696c5f XMM04=6d61702c766e655f6d61702c7374696d XMM05=78696e755f6d61702c74696d7265705f XMM06=6469756e69676f6c5f6d61702c78756e XMM07=672065736f6c635f6e6f69737365733a XMM08=61662029286e65706f5f746964756100 XMM09=00000000000000000000000000000000 XMM10=00000000000000000000000000000000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000