syzkaller login: [ 31.829332] BUG: Bad rss-counter state mm:0000000020d6b53e type:MM_FILEPAGES val:33 [ 31.830623] BUG: Bad rss-counter state mm:0000000020d6b53e type:MM_ANONPAGES val:22 [ 31.989614] ================================================================== [ 31.990746] BUG: KASAN: slab-use-after-free in vma_interval_tree_remove+0xc75/0xec0 [ 31.991960] Read of size 8 at addr ffff88800e77bed8 by task sshd/221 [ 31.992956] [ 31.993224] CPU: 1 PID: 221 Comm: sshd Not tainted 6.4.0-rc7-next-20230619 #1 [ 31.994351] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS 1.12.0-1 04/01/2014 [ 31.995336] Call Trace: [ 31.995658] [ 31.995945] dump_stack_lvl+0x91/0xf0 [ 31.996434] print_report+0xcc/0x620 [ 31.996922] ? __virt_addr_valid+0x102/0x340 [ 31.997475] ? vma_interval_tree_remove+0xc75/0xec0 [ 31.998105] ? vma_interval_tree_remove+0xc75/0xec0 [ 31.998722] kasan_report+0xbe/0xf0 [ 31.999200] ? vma_interval_tree_remove+0xc75/0xec0 [ 31.999814] vma_interval_tree_remove+0xc75/0xec0 [ 32.000410] vma_prepare+0xc54/0x11a0 [ 32.000885] __split_vma+0x5af/0x950 [ 32.001353] ? __pfx___split_vma+0x10/0x10 [ 32.001890] ? find_held_lock+0x2c/0x110 [ 32.002415] do_vmi_align_munmap+0x2ba/0x11f0 [ 32.002981] ? lock_is_held_type+0x9f/0x120 [ 32.003518] ? __pfx_do_vmi_align_munmap+0x10/0x10 [ 32.004120] ? mtree_range_walk+0x632/0x900 [ 32.004667] ? mas_walk+0x5c7/0x7c0 [ 32.005143] do_vmi_munmap+0x1f1/0x2b0 [ 32.005642] mmap_region+0x1f9/0x2660 [ 32.006150] ? vm_mmap_pgoff+0x15c/0x3a0 [ 32.006684] ? __pfx_arch_get_unmapped_area_topdown+0x10/0x10 [ 32.007398] ? __pfx_lock_acquire+0x10/0x10 [ 32.007933] ? __pfx_mmap_region+0x10/0x10 [ 32.008468] ? security_mmap_addr+0x7d/0xa0 [ 32.008997] ? get_unmapped_area+0x1f5/0x3f0 [ 32.009550] do_mmap+0x854/0xf00 [ 32.009998] vm_mmap_pgoff+0x1a6/0x3a0 [ 32.010492] ? __pfx_vm_mmap_pgoff+0x10/0x10 [ 32.011059] ksys_mmap_pgoff+0x3af/0x500 [ 32.011566] do_syscall_64+0x3f/0x90 [ 32.012041] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 32.012688] RIP: 0033:0x7fe74e999d82 [ 32.013150] 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 [ 32.015327] RSP: 002b:00007ffdf52e2958 EFLAGS: 00000206 ORIG_RAX: 0000000000000009 [ 32.016238] RAX: ffffffffffffffda RBX: 0000000000000812 RCX: 00007fe74e999d82 [ 32.017092] RDX: 0000000000000005 RSI: 0000000000001000 RDI: 00007fe74ddd3000 [ 32.017954] RBP: 00007fe74ddd3000 R08: 0000000000000009 R09: 0000000000001000 [ 32.018815] R10: 0000000000000812 R11: 0000000000000206 R12: 000055fe20e6db20 [ 32.019674] R13: 00007ffdf52e2970 R14: 00007ffdf52e29a0 R15: 00007ffdf52e2d00 [ 32.020531] [ 32.020830] [ 32.021045] Allocated by task 214: [ 32.021488] kasan_save_stack+0x22/0x50 [ 32.022013] kasan_set_track+0x25/0x30 [ 32.022515] __kasan_slab_alloc+0x59/0x70 [ 32.023047] kmem_cache_alloc+0x16b/0x370 [ 32.023563] vm_area_dup+0x20/0x160 [ 32.024018] __split_vma+0x170/0x950 [ 32.024486] split_vma+0xc6/0x110 [ 32.024923] mprotect_fixup+0x8d2/0xb30 [ 32.025422] do_mprotect_pkey+0x87e/0xd40 [ 32.025955] __x64_sys_mprotect+0x78/0xc0 [ 32.026474] do_syscall_64+0x3f/0x90 [ 32.026959] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 32.027608] [ 32.027826] Freed by task 214: [ 32.028215] kasan_save_stack+0x22/0x50 [ 32.028723] kasan_set_track+0x25/0x30 [ 32.029230] kasan_save_free_info+0x2b/0x50 [ 32.029770] __kasan_slab_free+0x10a/0x190 [ 32.030324] kmem_cache_free+0x10d/0x4d0 [ 32.030841] rcu_core+0x8c8/0x2860 [ 32.031290] __do_softirq+0x1b7/0x7d4 [ 32.031784] [ 32.032004] Last potentially related work creation: [ 32.032612] kasan_save_stack+0x22/0x50 [ 32.033125] __kasan_record_aux_stack+0x8e/0xa0 [ 32.033706] __call_rcu_common.constprop.0+0x6a/0xb90 [ 32.034377] remove_vma+0x139/0x170 [ 32.034840] do_vmi_align_munmap+0xd4a/0x11f0 [ 32.035401] do_vmi_munmap+0x1f1/0x2b0 [ 32.035890] __vm_munmap+0x138/0x3a0 [ 32.036404] __x64_sys_munmap+0x59/0x80 [ 32.036918] do_syscall_64+0x3f/0x90 [ 32.037395] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 32.038053] [ 32.038279] The buggy address belongs to the object at ffff88800e77be80 [ 32.038279] which belongs to the cache vm_area_struct of size 168 [ 32.039782] The buggy address is located 88 bytes inside of [ 32.039782] freed 168-byte region [ffff88800e77be80, ffff88800e77bf28) [ 32.041195] [ 32.041418] The buggy address belongs to the physical page: [ 32.042111] page:0000000070837601 refcount:1 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0xe77b [ 32.043206] memcg:ffff88801810d401 [ 32.043632] flags: 0x100000000000200(slab|node=0|zone=1) [ 32.044275] page_type: 0xffffffff() [ 32.044731] raw: 0100000000000200 ffff88800879fc80 dead000000000122 0000000000000000 [ 32.045655] raw: 0000000000000000 0000000000110011 00000001ffffffff ffff88801810d401 [ 32.046577] page dumped because: kasan: bad access detected [ 32.047240] [ 32.047459] Memory state around the buggy address: [ 32.048039] ffff88800e77bd80: fc fc fc 00 00 00 00 00 00 00 00 00 00 00 00 00 [ 32.048901] ffff88800e77be00: 00 00 00 00 00 00 00 00 fc fc fc fc fc fc fc fc [ 32.049766] >ffff88800e77be80: fa fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb [ 32.050656] ^ [ 32.051397] ffff88800e77bf00: fb fb fb fb fb fc fc fc fc fc fc fc fc fc fc fc [ 32.052253] ffff88800e77bf80: fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc [ 32.053112] ================================================================== [ 32.054259] Disabling lock debugging due to kernel taint [ 33.929559] BUG: Bad rss-counter state mm:000000001bf58379 type:MM_FILEPAGES val:33 [ 33.930432] BUG: Bad rss-counter state mm:000000001bf58379 type:MM_ANONPAGES val:22 [ 34.431998] BUG: Bad rss-counter state mm:000000003d5c74ed type:MM_FILEPAGES val:33 [ 34.433073] BUG: Bad rss-counter state mm:000000003d5c74ed type:MM_ANONPAGES val:22 Warning: Permanently added '[localhost]:57530' (ECDSA) to the list of known hosts. 2023/06/19 11:30:03 fuzzer started 2023/06/19 11:30:03 dialing manager at localhost:44161 2023/06/19 11:30:03 checking machine... 2023/06/19 11:30:03 checking revisions... [ 35.217651] kmemleak: Automatic memory scanning thread ended 2023/06/19 11:30:03 testing simple program... [ 35.273971] cgroup: Unknown subsys name 'net' [ 35.310626] cgroup: Unknown subsys name 'rlimit' executing program executing program executing program VM DIAGNOSIS: 11:30:02 Registers: info registers vcpu 0 RAX=0000000000000246 RBX=0000000000000000 RCX=0000000000000000 RDX=ffff888013e18000 RSI=00000000000000ca RDI=ffffffff8450c060 RBP=ffff88800f5fff58 RSP=ffff88800f5fff18 R8 =0000000000000001 R9 =ffffed10027c336d R10=ffff888013e19b6b R11=0000000000000001 R12=ffff88800f5fff58 R13=0000000000000000 R14=0000000000000000 R15=0000000000000000 RIP=ffffffff8153432b RFL=00000002 [-------] 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 00007f2a2f8cc700 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=00007ffc715b5bf8 CR3=000000000d98a000 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=30333a3131203931206e754a3e36383c XMM01=7365733a646873732878696e755f6d61 XMM02=736f6c63206e6f6973736573203a296e XMM03=5f6d6170203a5d3033325b6468737320 XMM04=6456774875434142334f726f59427469 XMM05=485320415352203a3268737320343430 XMM06=206d6f726620746f6f7220726f662079 XMM07=00000000000000000000000000000000 XMM08=3a677562656420676f6c737973720000 XMM09=00000000000000000000000000000000 XMM10=00000000000000000000000000000000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000 info registers vcpu 1 RAX=0000000000000001 RBX=0000000000000001 RCX=ffffffff8153425b RDX=fffffbfff0ba77db RSI=0000000000000008 RDI=ffffffff85d3bed0 RBP=ffffffff8452fffc RSP=ffff888015c3f9a8 R8 =0000000000000000 R9 =fffffbfff0ba77da R10=ffffffff85d3bed7 R11=00000000000b6c88 R12=ffff88800bfb7c80 R13=0000000000000000 R14=0000000000000001 R15=0000000000000d40 RIP=ffffffff8135b8e0 RFL=00000047 [---Z-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 =0000 0000000000000000 00000000 00000000 DS =0000 0000000000000000 00000000 00000000 FS =0000 00007fa6ee887900 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=00007fa6edda7010 CR3=000000000c69e000 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=454d49544c4145525f454352554f535f XMM01=3d504d415453454d49545f454d49544c XMM02=ffffffffffffffffffffffffffffffff XMM03=2f6c616e72756f6a2f676f6c2f6e7572 XMM04=5ffb3bdc2bcc6cc100000000000ae988 XMM05=a26f2e6f785f03ef0000000000134c50 XMM06=e4cb8bb95a7664b60000000000133ae8 XMM07=00000000000000000000000000000000 XMM08=415453454d49545f454d49544c414552 XMM09=00000000000000000000000000000000 XMM10=00000000000000000000000000000000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000