syzkaller login: [ 42.368924] BUG: Bad rss-counter state mm:000000002cea8d4b type:MM_FILEPAGES val:33 [ 42.369833] BUG: Bad rss-counter state mm:000000002cea8d4b type:MM_ANONPAGES val:22 [ 42.527736] ================================================================== [ 42.528663] BUG: KASAN: slab-use-after-free in vma_interval_tree_remove+0xc75/0xec0 [ 42.529600] Read of size 8 at addr ffff88800db30968 by task sshd/218 [ 42.530373] [ 42.530597] CPU: 0 PID: 218 Comm: sshd Not tainted 6.4.0-rc7-next-20230619 #1 [ 42.531578] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS 1.12.0-1 04/01/2014 [ 42.532558] Call Trace: [ 42.532874] [ 42.533158] dump_stack_lvl+0x91/0xf0 [ 42.533659] print_report+0xcc/0x620 [ 42.534152] ? __virt_addr_valid+0x102/0x340 [ 42.534705] ? vma_interval_tree_remove+0xc75/0xec0 [ 42.535328] ? vma_interval_tree_remove+0xc75/0xec0 [ 42.535945] kasan_report+0xbe/0xf0 [ 42.536446] ? vma_interval_tree_remove+0xc75/0xec0 [ 42.537067] vma_interval_tree_remove+0xc75/0xec0 [ 42.537669] vma_prepare+0xc54/0x11a0 [ 42.538153] __split_vma+0x5af/0x950 [ 42.538624] ? __pfx___split_vma+0x10/0x10 [ 42.539160] ? find_held_lock+0x2c/0x110 [ 42.539685] do_vmi_align_munmap+0x2ba/0x11f0 [ 42.540248] ? lock_is_held_type+0x9f/0x120 [ 42.540791] ? __pfx_do_vmi_align_munmap+0x10/0x10 [ 42.541406] ? mtree_range_walk+0x632/0x900 [ 42.541957] ? mas_walk+0x5c7/0x7c0 [ 42.542435] do_vmi_munmap+0x1f1/0x2b0 [ 42.542926] mmap_region+0x1f9/0x2660 [ 42.543408] ? vm_mmap_pgoff+0x15c/0x3a0 [ 42.543930] ? __pfx_arch_get_unmapped_area_topdown+0x10/0x10 [ 42.544664] ? __pfx_lock_acquire+0x10/0x10 [ 42.545201] ? __pfx_mmap_region+0x10/0x10 [ 42.545730] ? security_mmap_addr+0x7d/0xa0 [ 42.546267] ? get_unmapped_area+0x1f5/0x3f0 [ 42.546820] do_mmap+0x854/0xf00 [ 42.547262] vm_mmap_pgoff+0x1a6/0x3a0 [ 42.547754] ? __pfx_vm_mmap_pgoff+0x10/0x10 [ 42.548315] ksys_mmap_pgoff+0x3af/0x500 [ 42.548840] do_syscall_64+0x3f/0x90 [ 42.549314] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 42.549959] RIP: 0033:0x7fad037fed82 [ 42.550412] 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 [ 42.552533] RSP: 002b:00007ffc0a2daa28 EFLAGS: 00000206 ORIG_RAX: 0000000000000009 [ 42.553437] RAX: ffffffffffffffda RBX: 0000000000000812 RCX: 00007fad037fed82 [ 42.554286] RDX: 0000000000000005 RSI: 0000000000001000 RDI: 00007fad02c38000 [ 42.555128] RBP: 00007fad02c38000 R08: 0000000000000009 R09: 0000000000001000 [ 42.555967] R10: 0000000000000812 R11: 0000000000000206 R12: 000055b218ce7b20 [ 42.556820] R13: 00007ffc0a2daa40 R14: 00007ffc0a2daa70 R15: 00007ffc0a2dadd0 [ 42.557670] [ 42.557959] [ 42.558180] Allocated by task 211: [ 42.558615] kasan_save_stack+0x22/0x50 [ 42.559123] kasan_set_track+0x25/0x30 [ 42.559614] __kasan_slab_alloc+0x59/0x70 [ 42.560132] kmem_cache_alloc+0x16b/0x370 [ 42.560659] vm_area_dup+0x20/0x160 [ 42.561110] __split_vma+0x170/0x950 [ 42.561579] split_vma+0xc6/0x110 [ 42.562015] mprotect_fixup+0x8d2/0xb30 [ 42.562519] do_mprotect_pkey+0x87e/0xd40 [ 42.563034] __x64_sys_mprotect+0x78/0xc0 [ 42.563553] do_syscall_64+0x3f/0x90 [ 42.564023] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 42.564678] [ 42.564894] Freed by task 211: [ 42.565284] kasan_save_stack+0x22/0x50 [ 42.565784] kasan_set_track+0x25/0x30 [ 42.566280] kasan_save_free_info+0x2b/0x50 [ 42.566815] __kasan_slab_free+0x10a/0x190 [ 42.567346] kmem_cache_free+0x10d/0x4d0 [ 42.567855] rcu_core+0x8c8/0x2860 [ 42.568297] __do_softirq+0x1b7/0x7d4 [ 42.568793] [ 42.569017] Last potentially related work creation: [ 42.569600] kasan_save_stack+0x22/0x50 [ 42.570104] __kasan_record_aux_stack+0x8e/0xa0 [ 42.570679] __call_rcu_common.constprop.0+0x6a/0xb90 [ 42.571326] remove_vma+0x139/0x170 [ 42.571778] do_vmi_align_munmap+0xd4a/0x11f0 [ 42.572338] do_vmi_munmap+0x1f1/0x2b0 [ 42.572835] __vm_munmap+0x138/0x3a0 [ 42.573298] __x64_sys_munmap+0x59/0x80 [ 42.573796] do_syscall_64+0x3f/0x90 [ 42.574270] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 42.574909] [ 42.575121] The buggy address belongs to the object at ffff88800db30910 [ 42.575121] which belongs to the cache vm_area_struct of size 168 [ 42.576604] The buggy address is located 88 bytes inside of [ 42.576604] freed 168-byte region [ffff88800db30910, ffff88800db309b8) [ 42.578003] [ 42.578216] The buggy address belongs to the physical page: [ 42.578879] page:00000000e2929d77 refcount:1 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0xdb30 [ 42.579959] memcg:ffff88800d609901 [ 42.580384] flags: 0x100000000000200(slab|node=0|zone=1) [ 42.581039] page_type: 0xffffffff() [ 42.581486] raw: 0100000000000200 ffff88800879fc80 ffffea00003c3340 dead000000000006 [ 42.582394] raw: 0000000000000000 0000000000110011 00000001ffffffff ffff88800d609901 [ 42.583299] page dumped because: kasan: bad access detected [ 42.583961] [ 42.584178] Memory state around the buggy address: [ 42.584768] ffff88800db30800: fc fc fc fc fc fa fb fb fb fb fb fb fb fb fb fb [ 42.585620] ffff88800db30880: fb fb fb fb fb fb fb fb fb fb fc fc fc fc fc fc [ 42.586466] >ffff88800db30900: fc fc fa fb fb fb fb fb fb fb fb fb fb fb fb fb [ 42.587306] ^ [ 42.588085] ffff88800db30980: fb fb fb fb fb fb fb fc fc fc fc fc fc fc fc 00 [ 42.588957] ffff88800db30a00: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 [ 42.589796] ================================================================== [ 42.590740] Disabling lock debugging due to kernel taint [ 44.922977] BUG: Bad rss-counter state mm:00000000a5c99900 type:MM_FILEPAGES val:33 [ 44.924482] BUG: Bad rss-counter state mm:00000000a5c99900 type:MM_ANONPAGES val:22 [ 45.439142] BUG: Bad rss-counter state mm:00000000c99e5b5c type:MM_FILEPAGES val:33 [ 45.440246] BUG: Bad rss-counter state mm:00000000c99e5b5c type:MM_ANONPAGES val:22 Warning: Permanently added '[localhost]:6637' (ECDSA) to the list of known hosts. 2023/06/19 11:47:00 fuzzer started 2023/06/19 11:47:00 dialing manager at localhost:44161 2023/06/19 11:47:00 checking machine... 2023/06/19 11:47:00 checking revisions... [ 46.163534] kmemleak: Automatic memory scanning thread ended 2023/06/19 11:47:01 testing simple program... [ 46.208452] cgroup: Unknown subsys name 'net' [ 46.257362] cgroup: Unknown subsys name 'rlimit' executing program executing program executing program VM DIAGNOSIS: 11:46:56 Registers: info registers vcpu 0 RAX=ffffffff83634883 RBX=0000000000000007 RCX=0000000000000001 RDX=0000000000000cc0 RSI=000000000000000c RDI=ffff8880183dfa98 RBP=dffffc0000000000 RSP=ffff8880183df9d0 R8 =0000000000000000 R9 =fffffbfff0ba77da R10=ffffffff85d3bed7 R11=00000000000b6996 R12=000000000000000c R13=0000000000000cc0 R14=ffff8880183dfa60 R15=0000000000000cc0 RIP=ffffffff813ad5f9 RFL=00000287 [--S--PC] 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 00007f9eb3dae900 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=00007f9eb4365618 CR3=000000000e4ee000 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=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 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=ffff888008c58400 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=00007fe0c453e020 CR3=000000000c6e6000 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=51d8ea683565d499bb4736ca144f7f1b XMM02=0000000000120520eff9b2d0a8fce9cb XMM03=00000000001205f02c67c8bc2e329bc3 XMM04=497ac3063a44cf9600000000000ae988 XMM05=768857279ebbf1d00000000000135730 XMM06=bdf2e299e47b49d50000000000134ff8 XMM07=e042d86d42eb936e0000000000126308 XMM08=873c95342b37d0bd00000000001205f0 XMM09=00000000000000000000000000000000 XMM10=20200000000020202020202020200000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000