syzkaller login: [ 38.770117] BUG: Bad rss-counter state mm:000000008a2dccce type:MM_FILEPAGES val:33 [ 38.771586] BUG: Bad rss-counter state mm:000000008a2dccce type:MM_ANONPAGES val:22 [ 38.953268] ================================================================== [ 38.954250] BUG: KASAN: slab-use-after-free in vma_interval_tree_remove+0xc75/0xec0 [ 38.955213] Read of size 8 at addr ffff88800df17228 by task sshd/219 [ 38.956003] [ 38.956231] CPU: 0 PID: 219 Comm: sshd Not tainted 6.4.0-rc7-next-20230620 #1 [ 38.957231] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS 1.12.0-1 04/01/2014 [ 38.958246] Call Trace: [ 38.958586] <TASK> [ 38.958880] dump_stack_lvl+0x91/0xf0 [ 38.959390] print_report+0xcc/0x620 [ 38.959893] ? __virt_addr_valid+0x102/0x340 [ 38.960456] ? vma_interval_tree_remove+0xc75/0xec0 [ 38.961105] ? vma_interval_tree_remove+0xc75/0xec0 [ 38.961751] kasan_report+0xbe/0xf0 [ 38.962242] ? vma_interval_tree_remove+0xc75/0xec0 [ 38.962885] vma_interval_tree_remove+0xc75/0xec0 [ 38.963518] vma_prepare+0xc54/0x11a0 [ 38.964022] __split_vma+0x5af/0x950 [ 38.964507] ? __pfx___split_vma+0x10/0x10 [ 38.965050] ? find_held_lock+0x2c/0x110 [ 38.965613] do_vmi_align_munmap+0x2ba/0x11f0 [ 38.966194] ? lock_is_held_type+0x9f/0x120 [ 38.966756] ? __pfx_do_vmi_align_munmap+0x10/0x10 [ 38.967389] ? mtree_range_walk+0x632/0x900 [ 38.967972] ? mas_walk+0x5c7/0x7c0 [ 38.968469] do_vmi_munmap+0x1f1/0x2b0 [ 38.968990] mmap_region+0x1f9/0x2660 [ 38.969508] ? vm_mmap_pgoff+0x15c/0x3a0 [ 38.970038] ? __pfx_arch_get_unmapped_area_topdown+0x10/0x10 [ 38.970775] ? __pfx_lock_acquire+0x10/0x10 [ 38.971323] ? __pfx_mmap_region+0x10/0x10 [ 38.971867] ? security_mmap_addr+0x7d/0xa0 [ 38.972414] ? get_unmapped_area+0x1f5/0x3f0 [ 38.972978] do_mmap+0x854/0xf00 [ 38.973452] vm_mmap_pgoff+0x1a6/0x3a0 [ 38.973969] ? __pfx_vm_mmap_pgoff+0x10/0x10 [ 38.974549] ksys_mmap_pgoff+0x3af/0x500 [ 38.975068] do_syscall_64+0x3f/0x90 [ 38.975565] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 38.976235] RIP: 0033:0x7fda69bf9d82 [ 38.976711] 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 [ 38.978892] RSP: 002b:00007ffda4cc5388 EFLAGS: 00000206 ORIG_RAX: 0000000000000009 [ 38.979830] RAX: ffffffffffffffda RBX: 0000000000000812 RCX: 00007fda69bf9d82 [ 38.980703] RDX: 0000000000000005 RSI: 0000000000001000 RDI: 00007fda69033000 [ 38.981593] RBP: 00007fda69033000 R08: 0000000000000009 R09: 0000000000001000 [ 38.982463] R10: 0000000000000812 R11: 0000000000000206 R12: 000055f236cf9f70 [ 38.983333] R13: 00007ffda4cc53a0 R14: 00007ffda4cc53d0 R15: 00007ffda4cc5730 [ 38.984209] </TASK> [ 38.984508] [ 38.984729] Allocated by task 212: [ 38.985170] kasan_save_stack+0x22/0x50 [ 38.985711] kasan_set_track+0x25/0x30 [ 38.986213] __kasan_slab_alloc+0x59/0x70 [ 38.986763] kmem_cache_alloc+0x16b/0x370 [ 38.987289] vm_area_dup+0x20/0x160 [ 38.987754] __split_vma+0x170/0x950 [ 38.988227] split_vma+0xc6/0x110 [ 38.988678] mprotect_fixup+0x8d2/0xb30 [ 38.989193] do_mprotect_pkey+0x87e/0xd40 [ 38.989734] __x64_sys_mprotect+0x78/0xc0 [ 38.990266] do_syscall_64+0x3f/0x90 [ 38.990759] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 38.991412] [ 38.991633] Freed by task 212: [ 38.992028] kasan_save_stack+0x22/0x50 [ 38.992536] kasan_set_track+0x25/0x30 [ 38.993036] kasan_save_free_info+0x2b/0x50 [ 38.993596] __kasan_slab_free+0x10a/0x190 [ 38.994135] kmem_cache_free+0x10d/0x4d0 [ 38.994646] rcu_core+0x8c8/0x2860 [ 38.995100] __do_softirq+0x1b7/0x7d4 [ 38.995588] [ 38.995806] Last potentially related work creation: [ 38.996400] kasan_save_stack+0x22/0x50 [ 38.996907] __kasan_record_aux_stack+0x8e/0xa0 [ 38.997493] __call_rcu_common.constprop.0+0x6a/0xb90 [ 38.998144] remove_vma+0x139/0x170 [ 38.998604] do_vmi_align_munmap+0xd4a/0x11f0 [ 38.999173] do_vmi_munmap+0x1f1/0x2b0 [ 38.999666] __vm_munmap+0x138/0x3a0 [ 39.000144] __x64_sys_munmap+0x59/0x80 [ 39.000666] do_syscall_64+0x3f/0x90 [ 39.001153] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 39.001818] [ 39.002033] Second to last potentially related work creation: [ 39.002731] kasan_save_stack+0x22/0x50 [ 39.003238] __kasan_record_aux_stack+0x8e/0xa0 [ 39.003822] __call_rcu_common.constprop.0+0x6a/0xb90 [ 39.004471] remove_vma+0x139/0x170 [ 39.004926] do_vmi_align_munmap+0xd4a/0x11f0 [ 39.005492] do_vmi_munmap+0x1f1/0x2b0 [ 39.005986] mmap_region+0x1f9/0x2660 [ 39.006465] do_mmap+0x854/0xf00 [ 39.006902] vm_mmap_pgoff+0x1a6/0x3a0 [ 39.007398] ksys_mmap_pgoff+0x3af/0x500 [ 39.007900] do_syscall_64+0x3f/0x90 [ 39.008377] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 39.009021] [ 39.009237] The buggy address belongs to the object at ffff88800df171d0 [ 39.009237] which belongs to the cache vm_area_struct of size 168 [ 39.010736] The buggy address is located 88 bytes inside of [ 39.010736] freed 168-byte region [ffff88800df171d0, ffff88800df17278) [ 39.012136] [ 39.012351] The buggy address belongs to the physical page: [ 39.013015] page:000000002356057b refcount:1 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0xdf17 [ 39.014128] memcg:ffff88800ea7e401 [ 39.014553] flags: 0x100000000000200(slab|node=0|zone=1) [ 39.015205] page_type: 0xffffffff() [ 39.015662] raw: 0100000000000200 ffff8880087a0c80 dead000000000100 dead000000000122 [ 39.016582] raw: 0000000000000000 0000000000110011 00000001ffffffff ffff88800ea7e401 [ 39.017519] page dumped because: kasan: bad access detected [ 39.018185] [ 39.018401] Memory state around the buggy address: [ 39.018990] ffff88800df17100: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 [ 39.019849] ffff88800df17180: 00 00 fc fc fc fc fc fc fc fc fa fb fb fb fb fb [ 39.020734] >ffff88800df17200: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fc [ 39.021629] ^ [ 39.022192] ffff88800df17280: fc fc fc fc fc fc fc 00 00 00 00 00 00 00 00 00 [ 39.023048] ffff88800df17300: 00 00 00 00 00 00 00 00 00 00 00 00 fc fc fc fc [ 39.023902] ================================================================== [ 39.024963] Disabling lock debugging due to kernel taint [ 40.932098] BUG: Bad rss-counter state mm:0000000017d0bfd6 type:MM_FILEPAGES val:33 [ 40.933003] BUG: Bad rss-counter state mm:0000000017d0bfd6 type:MM_ANONPAGES val:22 [ 41.362472] BUG: Bad rss-counter state mm:00000000e7ec49c7 type:MM_FILEPAGES val:33 [ 41.363566] BUG: Bad rss-counter state mm:00000000e7ec49c7 type:MM_ANONPAGES val:22 Warning: Permanently added '[localhost]:12855' (ECDSA) to the list of known hosts. 2023/06/20 23:01:47 fuzzer started 2023/06/20 23:01:47 dialing manager at localhost:36067 2023/06/20 23:01:47 checking machine... 2023/06/20 23:01:47 checking revisions... [ 42.131885] kmemleak: Automatic memory scanning thread ended 2023/06/20 23:01:47 testing simple program... [ 42.175749] cgroup: Unknown subsys name 'net' [ 42.214872] cgroup: Unknown subsys name 'rlimit' executing program executing program executing program VM DIAGNOSIS: 23:01:46 Registers: info registers vcpu 0 RAX=00007fffc104e624 RBX=1ffff11002de0fbd RCX=0000000000000000 RDX=ffff88800e1cb680 RSI=ffffffff836339fb RDI=ffffffff85d3d350 RBP=00007fffc104e624 RSP=ffff888016f07da8 R8 =0000000000000000 R9 =fffffbfff0ba7a6a R10=ffffffff85d3d357 R11=0000000000000000 R12=000000000000000c R13=000000000000000c R14=ffff888016f07e28 R15=00007fffc104e628 RIP=ffffffff84501f34 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 00007f965f97f900 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=00007f965ff36618 CR3=000000000d182000 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=ffffffff8451250e RDX=ffffed100d9e6a01 RSI=0000000000000004 RDI=ffffffff81288ac5 RBP=dffffc0000000000 RSP=ffff888008e07e70 R8 =0000000000000000 R9 =ffffed100d9e6a00 R10=ffff88806cf35003 R11=0000000000000001 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=00007f36b427fe00 CR3=000000000d87a000 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=f384eceafd116199594b6d2587d66a48 XMM02=000000000011ad10eff9b2d0a8fce9cb XMM03=000000000011ade02c67c8bc2e329bc3 XMM04=ea604f55e447e90700000000000ae988 XMM05=dfcdbad4f1609c370000000000132610 XMM06=747fee6bfa1b58e900000000001317e8 XMM07=e042d86d42eb936e00000000001219a0 XMM08=7a61cf8021ed5a2a000000000011ade0 XMM09=00000000000000000000000000000000 XMM10=00000000000000000000000000000000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000