syzkaller login: [ 30.953417] BUG: Bad rss-counter state mm:000000002f4f8e14 type:MM_FILEPAGES val:33 [ 30.954430] BUG: Bad rss-counter state mm:000000002f4f8e14 type:MM_ANONPAGES val:22 [ 31.075580] ================================================================== [ 31.076240] BUG: KASAN: slab-use-after-free in vma_interval_tree_remove+0xc75/0xec0 [ 31.076849] Read of size 8 at addr ffff888016aed228 by task sshd/222 [ 31.077351] [ 31.077504] CPU: 0 PID: 222 Comm: sshd Not tainted 6.4.0-rc7-next-20230619 #1 [ 31.078118] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS 1.12.0-1 04/01/2014 [ 31.078743] Call Trace: [ 31.079043] [ 31.079235] dump_stack_lvl+0x91/0xf0 [ 31.079551] print_report+0xcc/0x620 [ 31.079872] ? __virt_addr_valid+0x102/0x340 [ 31.080392] ? vma_interval_tree_remove+0xc75/0xec0 [ 31.080810] ? vma_interval_tree_remove+0xc75/0xec0 [ 31.081234] kasan_report+0xbe/0xf0 [ 31.081554] ? vma_interval_tree_remove+0xc75/0xec0 [ 31.082007] vma_interval_tree_remove+0xc75/0xec0 [ 31.082412] vma_prepare+0xc54/0x11a0 [ 31.082738] __split_vma+0x5af/0x950 [ 31.083141] ? __pfx___split_vma+0x10/0x10 [ 31.083519] ? find_held_lock+0x2c/0x110 [ 31.083889] do_vmi_align_munmap+0x2ba/0x11f0 [ 31.084278] ? lock_is_held_type+0x9f/0x120 [ 31.084663] ? __pfx_do_vmi_align_munmap+0x10/0x10 [ 31.085088] ? mtree_range_walk+0x632/0x900 [ 31.085474] ? mas_walk+0x5c7/0x7c0 [ 31.085800] do_vmi_munmap+0x1f1/0x2b0 [ 31.086153] mmap_region+0x1f9/0x2660 [ 31.086508] ? vm_mmap_pgoff+0x15c/0x3a0 [ 31.086863] ? __pfx_arch_get_unmapped_area_topdown+0x10/0x10 [ 31.087424] ? __pfx_lock_acquire+0x10/0x10 [ 31.087823] ? __pfx_mmap_region+0x10/0x10 [ 31.088216] ? security_mmap_addr+0x7d/0xa0 [ 31.088581] ? get_unmapped_area+0x1f5/0x3f0 [ 31.089005] do_mmap+0x854/0xf00 [ 31.089319] vm_mmap_pgoff+0x1a6/0x3a0 [ 31.089691] ? __pfx_vm_mmap_pgoff+0x10/0x10 [ 31.090106] ksys_mmap_pgoff+0x3af/0x500 [ 31.090462] do_syscall_64+0x3f/0x90 [ 31.090792] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 31.091299] RIP: 0033:0x7f04395d4d82 [ 31.091625] 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 [ 31.093176] RSP: 002b:00007ffc60623cc8 EFLAGS: 00000206 ORIG_RAX: 0000000000000009 [ 31.093803] RAX: ffffffffffffffda RBX: 0000000000000812 RCX: 00007f04395d4d82 [ 31.094392] RDX: 0000000000000005 RSI: 0000000000001000 RDI: 00007f0438a0e000 [ 31.095015] RBP: 00007f0438a0e000 R08: 0000000000000009 R09: 0000000000001000 [ 31.095603] R10: 0000000000000812 R11: 0000000000000206 R12: 0000562a314a9ec0 [ 31.096191] R13: 00007ffc60623ce0 R14: 00007ffc60623d10 R15: 00007ffc60624070 [ 31.096783] [ 31.097002] [ 31.097150] Allocated by task 215: [ 31.097444] kasan_save_stack+0x22/0x50 [ 31.097795] kasan_set_track+0x25/0x30 [ 31.098135] __kasan_slab_alloc+0x59/0x70 [ 31.098506] kmem_cache_alloc+0x16b/0x370 [ 31.098863] vm_area_dup+0x20/0x160 [ 31.099215] __split_vma+0x170/0x950 [ 31.099537] split_vma+0xc6/0x110 [ 31.099839] mprotect_fixup+0x8d2/0xb30 [ 31.100201] do_mprotect_pkey+0x87e/0xd40 [ 31.100555] __x64_sys_mprotect+0x78/0xc0 [ 31.100919] do_syscall_64+0x3f/0x90 [ 31.101248] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 31.101686] [ 31.101835] Freed by task 215: [ 31.102100] kasan_save_stack+0x22/0x50 [ 31.102450] kasan_set_track+0x25/0x30 [ 31.102790] kasan_save_free_info+0x2b/0x50 [ 31.103198] __kasan_slab_free+0x10a/0x190 [ 31.103566] kmem_cache_free+0x10d/0x4d0 [ 31.103923] rcu_core+0x8c8/0x2860 [ 31.104239] __do_softirq+0x1b7/0x7d4 [ 31.104571] [ 31.104716] Last potentially related work creation: [ 31.105114] kasan_save_stack+0x22/0x50 [ 31.105459] __kasan_record_aux_stack+0x8e/0xa0 [ 31.105856] __call_rcu_common.constprop.0+0x6a/0xb90 [ 31.106298] remove_vma+0x139/0x170 [ 31.106606] do_vmi_align_munmap+0xd4a/0x11f0 [ 31.107023] do_vmi_munmap+0x1f1/0x2b0 [ 31.107355] __vm_munmap+0x138/0x3a0 [ 31.107675] __x64_sys_munmap+0x59/0x80 [ 31.108019] do_syscall_64+0x3f/0x90 [ 31.108351] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 31.108818] [ 31.108976] The buggy address belongs to the object at ffff888016aed1d0 [ 31.108976] which belongs to the cache vm_area_struct of size 168 [ 31.110021] The buggy address is located 88 bytes inside of [ 31.110021] freed 168-byte region [ffff888016aed1d0, ffff888016aed278) [ 31.111021] [ 31.111172] The buggy address belongs to the physical page: [ 31.111630] page:0000000062f2324a refcount:1 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0x16aed [ 31.112387] memcg:ffff888015b48601 [ 31.112679] flags: 0x100000000000200(slab|node=0|zone=1) [ 31.113126] page_type: 0xffffffff() [ 31.113433] raw: 0100000000000200 ffff88800879fc80 dead000000000122 0000000000000000 [ 31.114077] raw: 0000000000000000 0000000000110011 00000001ffffffff ffff888015b48601 [ 31.114701] page dumped because: kasan: bad access detected [ 31.115186] [ 31.115333] Memory state around the buggy address: [ 31.115747] ffff888016aed100: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 [ 31.116350] ffff888016aed180: 00 00 fc fc fc fc fc fc fc fc fa fb fb fb fb fb [ 31.116961] >ffff888016aed200: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fc [ 31.117561] ^ [ 31.117944] ffff888016aed280: fc fc fc fc fc fc fc fa fb fb fb fb fb fb fb fb [ 31.118559] ffff888016aed300: fb fb fb fb fb fb fb fb fb fb fb fb fc fc fc fc [ 31.119197] ================================================================== [ 31.119969] Disabling lock debugging due to kernel taint [ 32.741069] BUG: Bad rss-counter state mm:00000000d7597a9e type:MM_FILEPAGES val:33 [ 32.741764] BUG: Bad rss-counter state mm:00000000d7597a9e type:MM_ANONPAGES val:22 [ 33.122878] BUG: Bad rss-counter state mm:0000000081d41f0c type:MM_FILEPAGES val:33 [ 33.123598] BUG: Bad rss-counter state mm:0000000081d41f0c type:MM_ANONPAGES val:22 Warning: Permanently added '[localhost]:36778' (ECDSA) to the list of known hosts. 2023/06/20 08:58:21 fuzzer started 2023/06/20 08:58:22 dialing manager at localhost:44161 2023/06/20 08:58:22 checking machine... 2023/06/20 08:58:22 checking revisions... [ 33.709567] kmemleak: Automatic memory scanning thread ended 2023/06/20 08:58:22 testing simple program... [ 33.750001] cgroup: Unknown subsys name 'net' [ 33.785173] cgroup: Unknown subsys name 'rlimit' executing program executing program executing program VM DIAGNOSIS: 08:58:21 Registers: info registers vcpu 0 RAX=0000000000000000 RBX=ffff88800cfd7000 RCX=0000000000000000 RDX=0000000000000001 RSI=0000000000000001 RDI=ffff88800cfd7528 RBP=0000000000000000 RSP=ffff888019b1f9b8 R8 =0000000000000001 R9 =0000000000000000 R10=0000000000000000 R11=0000093000000930 R12=ffff88800cfd71b8 R13=ffff8880143bb980 R14=ffff888019b1fa88 R15=00000000000000a4 RIP=ffffffff812a0ff4 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 00007f91ccbf0900 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=00007f91cd1a7618 CR3=000000000f5b6000 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=0000000000000001 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=00007f91e172a830 CR3=000000000cb80000 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=2031323a38353a3830203032206e754a XMM01=73732878696e755f6d6170203a5d3133 XMM02=65736f6c63206e6f6973736573203a29 XMM03=755f6d6170203a5d3133325b64687373 XMM04=69662068637573206f4e203a656c6163 XMM05=3a656c696620766e65206e65706f206f XMM06=65733a6468737328766e655f6d617020 XMM07=6b7a79732031323a38353a3830203032 XMM08=3d656e696c646d632022656369767265 XMM09=00000000000000000000000000000000 XMM10=00000000000000000000000000000000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000