syzkaller login: [ 40.868974] BUG: Bad rss-counter state mm:00000000812e31ac type:MM_FILEPAGES val:33 [ 40.870186] BUG: Bad rss-counter state mm:00000000812e31ac type:MM_ANONPAGES val:22 [ 41.031178] ================================================================== [ 41.032121] BUG: KASAN: slab-use-after-free in vma_interval_tree_remove+0xc75/0xec0 [ 41.033074] Read of size 8 at addr ffff8880162f2a50 by task sshd/220 [ 41.033944] [ 41.034169] CPU: 0 PID: 220 Comm: sshd Not tainted 6.4.0-rc7-next-20230619 #1 [ 41.035060] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS 1.12.0-1 04/01/2014 [ 41.036041] Call Trace: [ 41.036361] [ 41.036660] dump_stack_lvl+0x91/0xf0 [ 41.037147] print_report+0xcc/0x620 [ 41.037639] ? __virt_addr_valid+0x102/0x340 [ 41.038190] ? vma_interval_tree_remove+0xc75/0xec0 [ 41.038853] ? vma_interval_tree_remove+0xc75/0xec0 [ 41.039471] kasan_report+0xbe/0xf0 [ 41.039949] ? vma_interval_tree_remove+0xc75/0xec0 [ 41.040604] vma_interval_tree_remove+0xc75/0xec0 [ 41.041206] vma_prepare+0xc54/0x11a0 [ 41.041689] __split_vma+0x5af/0x950 [ 41.042163] ? __pfx___split_vma+0x10/0x10 [ 41.042716] ? find_held_lock+0x2c/0x110 [ 41.043245] do_vmi_align_munmap+0x2ba/0x11f0 [ 41.043807] ? lock_is_held_type+0x9f/0x120 [ 41.044355] ? __pfx_do_vmi_align_munmap+0x10/0x10 [ 41.044972] ? mtree_range_walk+0x632/0x900 [ 41.045524] ? mas_walk+0x5c7/0x7c0 [ 41.046002] do_vmi_munmap+0x1f1/0x2b0 [ 41.046496] mmap_region+0x1f9/0x2660 [ 41.046981] ? vm_mmap_pgoff+0x15c/0x3a0 [ 41.047497] ? __pfx_arch_get_unmapped_area_topdown+0x10/0x10 [ 41.048226] ? __pfx_lock_acquire+0x10/0x10 [ 41.048793] ? __pfx_mmap_region+0x10/0x10 [ 41.049344] ? security_mmap_addr+0x7d/0xa0 [ 41.049900] ? get_unmapped_area+0x1f5/0x3f0 [ 41.050465] do_mmap+0x854/0xf00 [ 41.050917] vm_mmap_pgoff+0x1a6/0x3a0 [ 41.051436] ? __pfx_vm_mmap_pgoff+0x10/0x10 [ 41.052020] ksys_mmap_pgoff+0x3af/0x500 [ 41.052570] do_syscall_64+0x3f/0x90 [ 41.053066] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 41.053734] RIP: 0033:0x7f3e5a97bd82 [ 41.054208] 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 [ 41.056425] RSP: 002b:00007ffd6b4137f8 EFLAGS: 00000206 ORIG_RAX: 0000000000000009 [ 41.057340] RAX: ffffffffffffffda RBX: 0000000000000812 RCX: 00007f3e5a97bd82 [ 41.058188] RDX: 0000000000000005 RSI: 0000000000001000 RDI: 00007f3e59db5000 [ 41.059038] RBP: 00007f3e59db5000 R08: 0000000000000009 R09: 0000000000001000 [ 41.059886] R10: 0000000000000812 R11: 0000000000000206 R12: 00005629e88f1ec0 [ 41.060757] R13: 00007ffd6b413810 R14: 00007ffd6b413840 R15: 00007ffd6b413ba0 [ 41.061615] [ 41.061911] [ 41.062126] Allocated by task 213: [ 41.062556] kasan_save_stack+0x22/0x50 [ 41.063054] kasan_set_track+0x25/0x30 [ 41.063555] __kasan_slab_alloc+0x59/0x70 [ 41.064071] kmem_cache_alloc+0x16b/0x370 [ 41.064603] vm_area_dup+0x20/0x160 [ 41.065054] __split_vma+0x170/0x950 [ 41.065521] split_vma+0xc6/0x110 [ 41.065959] mprotect_fixup+0x8d2/0xb30 [ 41.066468] do_mprotect_pkey+0x87e/0xd40 [ 41.066988] __x64_sys_mprotect+0x78/0xc0 [ 41.067512] do_syscall_64+0x3f/0x90 [ 41.067979] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 41.068622] [ 41.068836] Freed by task 213: [ 41.069222] kasan_save_stack+0x22/0x50 [ 41.069720] kasan_set_track+0x25/0x30 [ 41.070208] kasan_save_free_info+0x2b/0x50 [ 41.070741] __kasan_slab_free+0x10a/0x190 [ 41.071267] kmem_cache_free+0x10d/0x4d0 [ 41.071770] rcu_core+0x8c8/0x2860 [ 41.072213] __do_softirq+0x1b7/0x7d4 [ 41.072698] [ 41.072913] Last potentially related work creation: [ 41.073498] kasan_save_stack+0x22/0x50 [ 41.073998] __kasan_record_aux_stack+0x8e/0xa0 [ 41.074565] __call_rcu_common.constprop.0+0x6a/0xb90 [ 41.075207] remove_vma+0x139/0x170 [ 41.075654] do_vmi_align_munmap+0xd4a/0x11f0 [ 41.076202] do_vmi_munmap+0x1f1/0x2b0 [ 41.076720] __vm_munmap+0x138/0x3a0 [ 41.077191] __x64_sys_munmap+0x59/0x80 [ 41.077685] do_syscall_64+0x3f/0x90 [ 41.078156] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 41.078801] [ 41.079018] The buggy address belongs to the object at ffff8880162f29f8 [ 41.079018] which belongs to the cache vm_area_struct of size 168 [ 41.080486] The buggy address is located 88 bytes inside of [ 41.080486] freed 168-byte region [ffff8880162f29f8, ffff8880162f2aa0) [ 41.081982] [ 41.082212] The buggy address belongs to the physical page: [ 41.082924] page:00000000ed0e38a8 refcount:1 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0x162f2 [ 41.084032] memcg:ffff88801830ca01 [ 41.084487] flags: 0x100000000000200(slab|node=0|zone=1) [ 41.085148] page_type: 0xffffffff() [ 41.085609] raw: 0100000000000200 ffff88800879fc80 dead000000000122 0000000000000000 [ 41.086544] raw: 0000000000000000 0000000000110011 00000001ffffffff ffff88801830ca01 [ 41.087475] page dumped because: kasan: bad access detected [ 41.088154] [ 41.088379] Memory state around the buggy address: [ 41.088970] ffff8880162f2900: fc fc 00 00 00 00 00 00 00 00 00 00 00 00 00 00 [ 41.089829] ffff8880162f2980: 00 00 00 00 00 00 00 fc fc fc fc fc fc fc fc fa [ 41.090673] >ffff8880162f2a00: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb [ 41.091514] ^ [ 41.092200] ffff8880162f2a80: fb fb fb fb fc fc fc fc fc fc fc fc fa fb fb fb [ 41.093052] ffff8880162f2b00: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb [ 41.093890] ================================================================== [ 41.094859] Disabling lock debugging due to kernel taint [ 43.341778] BUG: Bad rss-counter state mm:00000000b11f8593 type:MM_FILEPAGES val:33 [ 43.342764] BUG: Bad rss-counter state mm:00000000b11f8593 type:MM_ANONPAGES val:22 [ 43.701750] BUG: Bad rss-counter state mm:00000000267349d3 type:MM_FILEPAGES val:33 [ 43.702714] BUG: Bad rss-counter state mm:00000000267349d3 type:MM_ANONPAGES val:22 Warning: Permanently added '[localhost]:48794' (ECDSA) to the list of known hosts. 2023/06/20 04:50:57 fuzzer started 2023/06/20 04:50:57 dialing manager at localhost:44161 2023/06/20 04:50:57 checking machine... 2023/06/20 04:50:57 checking revisions... [ 44.400459] kmemleak: Automatic memory scanning thread ended 2023/06/20 04:50:58 testing simple program... [ 44.445110] cgroup: Unknown subsys name 'net' [ 44.533750] cgroup: Unknown subsys name 'rlimit' executing program executing program executing program VM DIAGNOSIS: 04:50:47 Registers: info registers vcpu 0 RAX=0000000000000000 RBX=000000000000007b RCX=ffffffff83726530 RDX=ffff88800f931b40 RSI=000000000000007b RDI=0000000000000011 RBP=000000000000007c RSP=ffff8880146cf7b8 R8 =0000000000000004 R9 =000000000000000a R10=000000000000007b R11=00000000000b6996 R12=000000000000000a R13=ffffffff87f96eb8 R14=0000000000000000 R15=0000000000000006 RIP=ffffffff814c0388 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 00007ff5a8169900 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=00007ff5a8720618 CR3=000000000f326000 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=00007ff02f71af30 CR3=00000000097de000 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=23553d0355f4b586b6491e669f1ea6de XMM02=000000000011da48eff9b2d0a8fce9cb XMM03=000000000011db182c67c8bc2e329bc3 XMM04=86f7c4c65dc05b9200000000000ae988 XMM05=19e9129bd510f2350000000000134348 XMM06=4fda316b135da52b00000000001341d0 XMM07=e042d86d42eb936e0000000000124a60 XMM08=c3b3c2b83bf92dbd000000000011db18 XMM09=00000000000000000000000000000000 XMM10=20200000000020202020202020200000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000