syzkaller login: [ 32.798544] BUG: Bad rss-counter state mm:000000009b7adf01 type:MM_FILEPAGES val:33 [ 32.799915] BUG: Bad rss-counter state mm:000000009b7adf01 type:MM_ANONPAGES val:22 [ 32.965162] ================================================================== [ 32.966347] BUG: KASAN: slab-use-after-free in vma_interval_tree_remove+0xc75/0xec0 [ 32.967574] Read of size 8 at addr ffff88800e2a53f8 by task sshd/220 [ 32.968756] [ 32.969033] CPU: 1 PID: 220 Comm: sshd Not tainted 6.4.0-rc7-next-20230619 #1 [ 32.970149] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS 1.12.0-1 04/01/2014 [ 32.971454] Call Trace: [ 32.971870] [ 32.972245] dump_stack_lvl+0x91/0xf0 [ 32.972871] print_report+0xcc/0x620 [ 32.973494] ? __virt_addr_valid+0x102/0x340 [ 32.974204] ? vma_interval_tree_remove+0xc75/0xec0 [ 32.975014] ? vma_interval_tree_remove+0xc75/0xec0 [ 32.975812] kasan_report+0xbe/0xf0 [ 32.976426] ? vma_interval_tree_remove+0xc75/0xec0 [ 32.977244] vma_interval_tree_remove+0xc75/0xec0 [ 32.978020] vma_prepare+0xc54/0x11a0 [ 32.978654] __split_vma+0x5af/0x950 [ 32.979254] ? __pfx___split_vma+0x10/0x10 [ 32.979937] ? find_held_lock+0x2c/0x110 [ 32.980608] do_vmi_align_munmap+0x2ba/0x11f0 [ 32.981340] ? lock_is_held_type+0x9f/0x120 [ 32.982035] ? __pfx_do_vmi_align_munmap+0x10/0x10 [ 32.982860] ? mtree_range_walk+0x632/0x900 [ 32.983581] ? mas_walk+0x5c7/0x7c0 [ 32.984183] do_vmi_munmap+0x1f1/0x2b0 [ 32.984818] mmap_region+0x1f9/0x2660 [ 32.985436] ? vm_mmap_pgoff+0x15c/0x3a0 [ 32.986092] ? __pfx_arch_get_unmapped_area_topdown+0x10/0x10 [ 32.987016] ? __pfx_lock_acquire+0x10/0x10 [ 32.987699] ? __pfx_mmap_region+0x10/0x10 [ 32.988376] ? security_mmap_addr+0x7d/0xa0 [ 32.989067] ? get_unmapped_area+0x1f5/0x3f0 [ 32.989785] do_mmap+0x854/0xf00 [ 32.990348] vm_mmap_pgoff+0x1a6/0x3a0 [ 32.991008] ? __pfx_vm_mmap_pgoff+0x10/0x10 [ 32.991729] ksys_mmap_pgoff+0x3af/0x500 [ 32.992385] do_syscall_64+0x3f/0x90 [ 32.993008] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 32.993845] RIP: 0033:0x7f0c31b9ad82 [ 32.994440] 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 [ 32.997199] RSP: 002b:00007fff5d46f008 EFLAGS: 00000206 ORIG_RAX: 0000000000000009 [ 32.998395] RAX: ffffffffffffffda RBX: 0000000000000812 RCX: 00007f0c31b9ad82 [ 32.999516] RDX: 0000000000000005 RSI: 0000000000001000 RDI: 00007f0c30fd4000 [ 33.000628] RBP: 00007f0c30fd4000 R08: 0000000000000009 R09: 0000000000001000 [ 33.001742] R10: 0000000000000812 R11: 0000000000000206 R12: 000055b68b5d4b20 [ 33.002853] R13: 00007fff5d46f020 R14: 00007fff5d46f050 R15: 00007fff5d46f3b0 [ 33.003957] [ 33.004343] [ 33.004625] Allocated by task 213: [ 33.005180] kasan_save_stack+0x22/0x50 [ 33.005822] kasan_set_track+0x25/0x30 [ 33.006466] __kasan_slab_alloc+0x59/0x70 [ 33.007137] kmem_cache_alloc+0x16b/0x370 [ 33.007817] vm_area_dup+0x20/0x160 [ 33.008403] __split_vma+0x170/0x950 [ 33.009096] split_vma+0xc6/0x110 [ 33.009664] mprotect_fixup+0x8d2/0xb30 [ 33.010314] do_mprotect_pkey+0x87e/0xd40 [ 33.011021] __x64_sys_mprotect+0x78/0xc0 [ 33.011699] do_syscall_64+0x3f/0x90 [ 33.012307] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 33.013131] [ 33.013403] Freed by task 203: [ 33.013916] kasan_save_stack+0x22/0x50 [ 33.014575] kasan_set_track+0x25/0x30 [ 33.015204] kasan_save_free_info+0x2b/0x50 [ 33.015888] __kasan_slab_free+0x10a/0x190 [ 33.016588] kmem_cache_free+0x10d/0x4d0 [ 33.017249] rcu_core+0x8c8/0x2860 [ 33.017821] __do_softirq+0x1b7/0x7d4 [ 33.018453] [ 33.018739] Last potentially related work creation: [ 33.019507] kasan_save_stack+0x22/0x50 [ 33.020160] __kasan_record_aux_stack+0x8e/0xa0 [ 33.020908] __call_rcu_common.constprop.0+0x6a/0xb90 [ 33.021740] remove_vma+0x139/0x170 [ 33.022328] do_vmi_align_munmap+0xd4a/0x11f0 [ 33.023053] do_vmi_munmap+0x1f1/0x2b0 [ 33.023676] __vm_munmap+0x138/0x3a0 [ 33.024269] __x64_sys_munmap+0x59/0x80 [ 33.024909] do_syscall_64+0x3f/0x90 [ 33.025498] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 33.026150] [ 33.026371] The buggy address belongs to the object at ffff88800e2a53a0 [ 33.026371] which belongs to the cache vm_area_struct of size 168 [ 33.027920] The buggy address is located 88 bytes inside of [ 33.027920] freed 168-byte region [ffff88800e2a53a0, ffff88800e2a5448) [ 33.029370] [ 33.029592] The buggy address belongs to the physical page: [ 33.030253] page:000000008d6672a9 refcount:1 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0xe2a5 [ 33.031356] memcg:ffff88801a14f001 [ 33.031786] flags: 0x100000000000200(slab|node=0|zone=1) [ 33.032434] page_type: 0xffffffff() [ 33.032891] raw: 0100000000000200 ffff88800879fc80 dead000000000122 0000000000000000 [ 33.033817] raw: 0000000000000000 0000000000110011 00000001ffffffff ffff88801a14f001 [ 33.034731] page dumped because: kasan: bad access detected [ 33.035393] [ 33.035612] Memory state around the buggy address: [ 33.036198] ffff88800e2a5280: fc fc fc fc fc fc fc 00 00 00 00 00 00 00 00 00 [ 33.037060] ffff88800e2a5300: 00 00 00 00 00 00 00 00 00 00 00 00 fc fc fc fc [ 33.037966] >ffff88800e2a5380: fc fc fc fc fa fb fb fb fb fb fb fb fb fb fb fb [ 33.038892] ^ [ 33.039790] ffff88800e2a5400: fb fb fb fb fb fb fb fb fb fc fc fc fc fc fc fc [ 33.040703] ffff88800e2a5480: fc fa fb fb fb fb fb fb fb fb fb fb fb fb fb fb [ 33.041607] ================================================================== [ 33.042650] Disabling lock debugging due to kernel taint [ 35.020573] BUG: Bad rss-counter state mm:00000000b5bc036b type:MM_FILEPAGES val:33 [ 35.021684] BUG: Bad rss-counter state mm:00000000b5bc036b type:MM_ANONPAGES val:22 [ 35.489405] BUG: Bad rss-counter state mm:0000000049b29d28 type:MM_FILEPAGES val:33 [ 35.490734] BUG: Bad rss-counter state mm:0000000049b29d28 type:MM_ANONPAGES val:22 Warning: Permanently added '[localhost]:31584' (ECDSA) to the list of known hosts. 2023/06/19 20:28:54 fuzzer started 2023/06/19 20:28:54 dialing manager at localhost:44161 2023/06/19 20:28:54 checking machine... 2023/06/19 20:28:54 checking revisions... [ 36.181752] kmemleak: Automatic memory scanning thread ended 2023/06/19 20:28:54 testing simple program... [ 36.236385] cgroup: Unknown subsys name 'net' [ 36.274762] cgroup: Unknown subsys name 'rlimit' executing program executing program executing program VM DIAGNOSIS: 20:28:52 Registers: info registers vcpu 0 RAX=0000000000000000 RBX=ffff888009749180 RCX=0000000000000000 RDX=ffff8880165bd1c0 RSI=ffffffff81865069 RDI=0000000000000007 RBP=ffff888009749180 RSP=ffff88800ec0fea0 R8 =0000000000000007 R9 =0000000000000000 R10=0000000000000508 R11=2f6e6962732f7273 R12=1ffff11001d81fd5 R13=0000000000000508 R14=ffff888009749270 R15=0000000000001000 RIP=ffffffff814c081b RFL=00000246 [---Z-P-] 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 00007f4029d26900 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=00007f402a2de0b0 CR3=0000000016a1c000 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=2c2c2c2c2c2c2c2c2c2c2c2c2c2c2c2c XMM01=00000000000000000000000000ff0000 XMM02=00000000000000000000000000ff0000 XMM03=5320444f4854454d5f54505952434e45 XMM04=40404040404040404040404040404040 XMM05=5a5a5a5a5a5a5a5a5a5a5a5a5a5a5a5a XMM06=20202020202020202020202020202020 XMM07=00000000000000000000000000000000 XMM08=6c6f636f746f72702f6374652f006563 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=00007f2535289e70 CR3=0000000015c36000 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=2034353a38323a3032203931206e754a XMM01=73732878696e755f6d6170203a5d3932 XMM02=65736f6c63206e6f6973736573203a29 XMM03=755f6d6170203a5d3932325b64687373 XMM04=69662068637573206f4e203a656c6163 XMM05=3a656c696620766e65206e65706f206f XMM06=65733a6468737328766e655f6d617020 XMM07=6b7a79732033353a38323a3032203931 XMM08=3d656e696c646d632022656369767265 XMM09=00000000000000000000000000000000 XMM10=00000000000000000000000000000000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000