syzkaller login: [ 31.945204] BUG: Bad rss-counter state mm:00000000d68016f0 type:MM_FILEPAGES val:33 [ 31.946382] BUG: Bad rss-counter state mm:00000000d68016f0 type:MM_ANONPAGES val:22 [ 31.984045] ================================================================== [ 31.984806] BUG: KASAN: slab-use-after-free in vma_interval_tree_remove+0xc75/0xec0 [ 31.985523] Read of size 8 at addr ffff88800b8a5140 by task sshd/219 [ 31.986114] [ 31.986279] CPU: 0 PID: 219 Comm: sshd Not tainted 6.4.0-rc7-next-20230619 #1 [ 31.986960] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS 1.12.0-1 04/01/2014 [ 31.987665] Call Trace: [ 31.987876] [ 31.988064] dump_stack_lvl+0x91/0xf0 [ 31.988392] print_report+0xcc/0x620 [ 31.988712] ? __virt_addr_valid+0x102/0x340 [ 31.989080] ? vma_interval_tree_remove+0xc75/0xec0 [ 31.989486] ? vma_interval_tree_remove+0xc75/0xec0 [ 31.989895] kasan_report+0xbe/0xf0 [ 31.990207] ? vma_interval_tree_remove+0xc75/0xec0 [ 31.990616] vma_interval_tree_remove+0xc75/0xec0 [ 31.991020] vma_prepare+0xc54/0x11a0 [ 31.991337] __split_vma+0x5af/0x950 [ 31.991650] ? __pfx___split_vma+0x10/0x10 [ 31.991998] ? find_held_lock+0x2c/0x110 [ 31.992343] do_vmi_align_munmap+0x2ba/0x11f0 [ 31.992711] ? lock_is_held_type+0x9f/0x120 [ 31.993066] ? __pfx_do_vmi_align_munmap+0x10/0x10 [ 31.993471] ? mtree_range_walk+0x632/0x900 [ 31.993839] ? mas_walk+0x5c7/0x7c0 [ 31.994152] do_vmi_munmap+0x1f1/0x2b0 [ 31.994479] mmap_region+0x1f9/0x2660 [ 31.994798] ? vm_mmap_pgoff+0x15c/0x3a0 [ 31.995143] ? __pfx_arch_get_unmapped_area_topdown+0x10/0x10 [ 31.995620] ? __pfx_lock_acquire+0x10/0x10 [ 31.995973] ? __pfx_mmap_region+0x10/0x10 [ 31.996323] ? security_mmap_addr+0x7d/0xa0 [ 31.996674] ? get_unmapped_area+0x1f5/0x3f0 [ 31.997031] do_mmap+0x854/0xf00 [ 31.997328] vm_mmap_pgoff+0x1a6/0x3a0 [ 31.997655] ? __pfx_vm_mmap_pgoff+0x10/0x10 [ 31.998024] ksys_mmap_pgoff+0x3af/0x500 [ 31.998357] do_syscall_64+0x3f/0x90 [ 31.998680] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 31.999181] RIP: 0033:0x7ff15f0c7d82 [ 31.999483] 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 [ 32.000888] RSP: 002b:00007ffe2c8b1a08 EFLAGS: 00000206 ORIG_RAX: 0000000000000009 [ 32.001486] RAX: ffffffffffffffda RBX: 0000000000000812 RCX: 00007ff15f0c7d82 [ 32.002047] RDX: 0000000000000005 RSI: 0000000000001000 RDI: 00007ff15e501000 [ 32.002608] RBP: 00007ff15e501000 R08: 0000000000000009 R09: 0000000000001000 [ 32.003176] R10: 0000000000000812 R11: 0000000000000206 R12: 00005604db502f70 [ 32.003744] R13: 00007ffe2c8b1a20 R14: 00007ffe2c8b1a50 R15: 00007ffe2c8b1db0 [ 32.004310] [ 32.004500] [ 32.004640] Allocated by task 212: [ 32.004924] kasan_save_stack+0x22/0x50 [ 32.005256] kasan_set_track+0x25/0x30 [ 32.005579] __kasan_slab_alloc+0x59/0x70 [ 32.005923] kmem_cache_alloc+0x16b/0x370 [ 32.006263] vm_area_dup+0x20/0x160 [ 32.006559] __split_vma+0x170/0x950 [ 32.006879] split_vma+0xc6/0x110 [ 32.007170] mprotect_fixup+0x8d2/0xb30 [ 32.007514] do_mprotect_pkey+0x87e/0xd40 [ 32.007869] __x64_sys_mprotect+0x78/0xc0 [ 32.008209] do_syscall_64+0x3f/0x90 [ 32.008520] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 32.008942] [ 32.009082] Freed by task 203: [ 32.009346] kasan_save_stack+0x22/0x50 [ 32.009679] kasan_set_track+0x25/0x30 [ 32.010003] kasan_save_free_info+0x2b/0x50 [ 32.010357] __kasan_slab_free+0x10a/0x190 [ 32.010711] kmem_cache_free+0x10d/0x4d0 [ 32.011054] rcu_core+0x8c8/0x2860 [ 32.011350] __do_softirq+0x1b7/0x7d4 [ 32.011666] [ 32.011812] Last potentially related work creation: [ 32.012201] kasan_save_stack+0x22/0x50 [ 32.012531] __kasan_record_aux_stack+0x8e/0xa0 [ 32.012907] __call_rcu_common.constprop.0+0x6a/0xb90 [ 32.013407] remove_vma+0x139/0x170 [ 32.013728] do_vmi_align_munmap+0xd4a/0x11f0 [ 32.014102] do_vmi_munmap+0x1f1/0x2b0 [ 32.014424] __vm_munmap+0x138/0x3a0 [ 32.014731] __x64_sys_munmap+0x59/0x80 [ 32.015077] do_syscall_64+0x3f/0x90 [ 32.015388] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 32.015831] [ 32.015970] The buggy address belongs to the object at ffff88800b8a50e8 [ 32.015970] which belongs to the cache vm_area_struct of size 168 [ 32.016945] The buggy address is located 88 bytes inside of [ 32.016945] freed 168-byte region [ffff88800b8a50e8, ffff88800b8a5190) [ 32.017879] [ 32.018020] The buggy address belongs to the physical page: [ 32.018458] page:00000000d199a432 refcount:1 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0xb8a5 [ 32.019181] memcg:ffff888009410801 [ 32.019464] flags: 0x100000000000200(slab|node=0|zone=1) [ 32.019890] page_type: 0xffffffff() [ 32.020192] raw: 0100000000000200 ffff88800879fc80 ffffea00003c25c0 dead000000000008 [ 32.020798] raw: 0000000000000000 0000000000110011 00000001ffffffff ffff888009410801 [ 32.021395] page dumped because: kasan: bad access detected [ 32.021835] [ 32.021973] Memory state around the buggy address: [ 32.022361] ffff88800b8a5000: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 [ 32.022936] ffff88800b8a5080: 00 00 00 00 00 fc fc fc fc fc fc fc fc fa fb fb [ 32.023502] >ffff88800b8a5100: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb [ 32.024067] ^ [ 32.024495] ffff88800b8a5180: fb fb fc fc fc fc fc fc fc fc 00 00 00 00 00 00 [ 32.025060] ffff88800b8a5200: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 fc [ 32.025624] ================================================================== [ 32.026371] Disabling lock debugging due to kernel taint [ 34.245738] BUG: Bad rss-counter state mm:00000000c47c3042 type:MM_FILEPAGES val:33 [ 34.246782] BUG: Bad rss-counter state mm:00000000c47c3042 type:MM_ANONPAGES val:22 [ 34.732469] BUG: Bad rss-counter state mm:000000004b1e297e type:MM_FILEPAGES val:33 [ 34.733469] BUG: Bad rss-counter state mm:000000004b1e297e type:MM_ANONPAGES val:22 Warning: Permanently added '[localhost]:3917' (ECDSA) to the list of known hosts. 2023/06/20 03:51:05 fuzzer started 2023/06/20 03:51:06 dialing manager at localhost:44161 2023/06/20 03:51:06 checking machine... 2023/06/20 03:51:06 checking revisions... [ 35.514107] kmemleak: Automatic memory scanning thread ended 2023/06/20 03:51:06 testing simple program... [ 35.560808] cgroup: Unknown subsys name 'net' [ 35.611233] cgroup: Unknown subsys name 'rlimit' executing program executing program executing program VM DIAGNOSIS: 03:51:05 Registers: info registers vcpu 0 RAX=1ffff11002d202d1 RBX=ffff888016901658 RCX=1ffff11001f86d6a RDX=dffffc0000000000 RSI=ffff888019f1cf58 RDI=ffff888016901688 RBP=ffff88800fc36b20 RSP=ffff888016cb7958 R8 =0000000000000001 R9 =0000000000000246 R10=0000000000000003 R11=00000000000b6996 R12=ffff888019f1cf20 R13=0000000000000000 R14=ffff888019908c28 R15=ffff888019908be0 RIP=ffffffff818474fe RFL=00000046 [---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 00007f170a8d8700 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=00007f17b45e4700 CR3=000000000d990000 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=2035303a31353a3330203032206e754a XMM01=73732878696e755f6d6170203a5d3832 XMM02=65736f6c63206e6f6973736573203a29 XMM03=755f6d6170203a5d3832325b64687373 XMM04=69662068637573206f4e203a656c6163 XMM05=3a656c696620766e65206e65706f206f XMM06=65733a6468737328766e655f6d617020 XMM07=6b7a79732035303a31353a3330203032 XMM08=3d656e696c646d632022656369767265 XMM09=00000000000000000000000000000000 XMM10=00000000000000000000000000000000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000 info registers vcpu 1 RAX=1ffffffff0bbf952 RBX=ffffffff85dfca94 RCX=ffffffff8180c8d9 RDX=0000000000000000 RSI=ffffffff861375e0 RDI=ffffffff85dfca8c RBP=ffffffff85dfca8c RSP=ffff88806cf099e0 R8 =ffffffff861375e0 R9 =ffff88806cf09ad8 R10=0000000000038001 R11=0000000000020dae R12=ffffffff85dfcaa0 R13=ffffffff85dfca8c R14=ffffffff85dfca8c R15=dffffc0000000000 RIP=ffffffff8112fc7f RFL=00000213 [----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 00007f0955d73900 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=00007f0955d38008 CR3=000000000f37e000 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=652022746f6f72223d74636361207469 XMM02=3d6c616e696d72657420322e322e302e XMM03=3d656d616e74736f682022646873732f XMM04=40404040404040404040404040404040 XMM05=5a5a5a5a5a5a5a5a5a5a5a5a5a5a5a5a XMM06=20202020202020202020202020202020 XMM07=00000000000000000000000000000000 XMM08=652075253d64692073253d706f000000 XMM09=00000000000000000000000000000000 XMM10=00000000000000000000000000000000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000