syzkaller login: [ 75.925104] BUG: Bad rss-counter state mm:00000000b5749966 type:MM_FILEPAGES val:33 [ 75.925680] BUG: Bad rss-counter state mm:00000000b5749966 type:MM_ANONPAGES val:22 [ 76.043038] ================================================================== [ 76.043964] BUG: KASAN: slab-use-after-free in vma_interval_tree_remove+0xc75/0xec0 [ 76.044944] Read of size 8 at addr ffff88801a1eeb38 by task sshd/220 [ 76.045706] [ 76.045978] CPU: 0 PID: 220 Comm: sshd Tainted: G L 6.4.0-rc7-next-20230619 #1 [ 76.046996] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS 1.12.0-1 04/01/2014 [ 76.047968] Call Trace: [ 76.048283] [ 76.048567] dump_stack_lvl+0x91/0xf0 [ 76.049075] print_report+0xcc/0x620 [ 76.049559] ? __virt_addr_valid+0x102/0x340 [ 76.050103] ? vma_interval_tree_remove+0xc75/0xec0 [ 76.050716] ? vma_interval_tree_remove+0xc75/0xec0 [ 76.051323] kasan_report+0xbe/0xf0 [ 76.051793] ? vma_interval_tree_remove+0xc75/0xec0 [ 76.052413] vma_interval_tree_remove+0xc75/0xec0 [ 76.053015] vma_prepare+0xc54/0x11a0 [ 76.053489] __split_vma+0x5af/0x950 [ 76.053954] ? __pfx___split_vma+0x10/0x10 [ 76.054473] ? find_held_lock+0x2c/0x110 [ 76.054991] do_vmi_align_munmap+0x2ba/0x11f0 [ 76.055558] ? lock_is_held_type+0x9f/0x120 [ 76.056093] ? __pfx_do_vmi_align_munmap+0x10/0x10 [ 76.056696] ? mtree_range_walk+0x632/0x900 [ 76.057240] ? mas_walk+0x5c7/0x7c0 [ 76.057714] do_vmi_munmap+0x1f1/0x2b0 [ 76.058203] mmap_region+0x1f9/0x2660 [ 76.058680] ? vm_mmap_pgoff+0x15c/0x3a0 [ 76.059183] ? __pfx_arch_get_unmapped_area_topdown+0x10/0x10 [ 76.059890] ? __pfx_lock_acquire+0x10/0x10 [ 76.060425] ? __pfx_mmap_region+0x10/0x10 [ 76.060965] ? security_mmap_addr+0x7d/0xa0 [ 76.061498] ? get_unmapped_area+0x1f5/0x3f0 [ 76.062045] do_mmap+0x854/0xf00 [ 76.062486] vm_mmap_pgoff+0x1a6/0x3a0 [ 76.062974] ? __pfx_vm_mmap_pgoff+0x10/0x10 [ 76.063538] ksys_mmap_pgoff+0x3af/0x500 [ 76.064037] do_syscall_64+0x3f/0x90 [ 76.064517] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 76.065160] RIP: 0033:0x7f1ad7ea3d82 [ 76.065612] 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 [ 76.067710] RSP: 002b:00007fff91affcc8 EFLAGS: 00000206 ORIG_RAX: 0000000000000009 [ 76.068623] RAX: ffffffffffffffda RBX: 0000000000000812 RCX: 00007f1ad7ea3d82 [ 76.069485] RDX: 0000000000000005 RSI: 0000000000001000 RDI: 00007f1ad72dd000 [ 76.070323] RBP: 00007f1ad72dd000 R08: 0000000000000009 R09: 0000000000001000 [ 76.071156] R10: 0000000000000812 R11: 0000000000000206 R12: 0000558558dcab20 [ 76.071991] R13: 00007fff91affce0 R14: 00007fff91affd10 R15: 00007fff91b00070 [ 76.072851] [ 76.073141] [ 76.073360] Allocated by task 213: [ 76.073801] kasan_save_stack+0x22/0x50 [ 76.074300] kasan_set_track+0x25/0x30 [ 76.074789] __kasan_slab_alloc+0x59/0x70 [ 76.075313] kmem_cache_alloc+0x16b/0x370 [ 76.075829] vm_area_dup+0x20/0x160 [ 76.076278] __split_vma+0x170/0x950 [ 76.076755] split_vma+0xc6/0x110 [ 76.077197] mprotect_fixup+0x8d2/0xb30 [ 76.077698] do_mprotect_pkey+0x87e/0xd40 [ 76.078212] __x64_sys_mprotect+0x78/0xc0 [ 76.078729] do_syscall_64+0x3f/0x90 [ 76.079206] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 76.079851] [ 76.080064] Freed by task 19: [ 76.080444] kasan_save_stack+0x22/0x50 [ 76.080960] kasan_set_track+0x25/0x30 [ 76.081448] kasan_save_free_info+0x2b/0x50 [ 76.081972] __kasan_slab_free+0x10a/0x190 [ 76.082503] kmem_cache_free+0x10d/0x4d0 [ 76.083005] rcu_core+0x8c8/0x2860 [ 76.083449] __do_softirq+0x1b7/0x7d4 [ 76.083922] [ 76.084135] Last potentially related work creation: [ 76.084739] kasan_save_stack+0x22/0x50 [ 76.085244] __kasan_record_aux_stack+0x8e/0xa0 [ 76.085815] __call_rcu_common.constprop.0+0x6a/0xb90 [ 76.086455] remove_vma+0x139/0x170 [ 76.086928] do_vmi_align_munmap+0xd4a/0x11f0 [ 76.087494] do_vmi_munmap+0x1f1/0x2b0 [ 76.087974] __vm_munmap+0x138/0x3a0 [ 76.088435] __x64_sys_munmap+0x59/0x80 [ 76.088930] do_syscall_64+0x3f/0x90 [ 76.089403] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 76.090040] [ 76.090253] The buggy address belongs to the object at ffff88801a1eeae0 [ 76.090253] which belongs to the cache vm_area_struct of size 168 [ 76.091713] The buggy address is located 88 bytes inside of [ 76.091713] freed 168-byte region [ffff88801a1eeae0, ffff88801a1eeb88) [ 76.093123] [ 76.093344] The buggy address belongs to the physical page: [ 76.094013] page:000000009f59c33a refcount:1 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0x1a1ee [ 76.095099] memcg:ffff888019ec5b01 [ 76.095524] flags: 0x100000000000200(slab|node=0|zone=1) [ 76.096158] page_type: 0xffffffff() [ 76.096612] raw: 0100000000000200 ffff88800879fc80 dead000000000122 0000000000000000 [ 76.097532] raw: 0000000000000000 0000000000110011 00000001ffffffff ffff888019ec5b01 [ 76.098435] page dumped because: kasan: bad access detected [ 76.099088] [ 76.099302] Memory state around the buggy address: [ 76.099884] ffff88801a1eea00: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 [ 76.100753] ffff88801a1eea80: 00 00 00 00 fc fc fc fc fc fc fc fc fa fb fb fb [ 76.101617] >ffff88801a1eeb00: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb [ 76.102462] ^ [ 76.103065] ffff88801a1eeb80: fb fc fc fc fc fc fc fc fc fa fb fb fb fb fb fb [ 76.103921] ffff88801a1eec00: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fc fc [ 76.104777] ================================================================== [ 76.105899] Disabling lock debugging due to kernel taint [ 78.151540] BUG: Bad rss-counter state mm:0000000000e456f3 type:MM_FILEPAGES val:33 [ 78.152771] BUG: Bad rss-counter state mm:0000000000e456f3 type:MM_ANONPAGES val:22 [ 78.580409] BUG: Bad rss-counter state mm:0000000092cf7265 type:MM_FILEPAGES val:33 [ 78.581646] BUG: Bad rss-counter state mm:0000000092cf7265 type:MM_ANONPAGES val:22 Warning: Permanently added '[localhost]:21622' (ECDSA) to the list of known hosts. 2023/06/19 17:57:19 fuzzer started 2023/06/19 17:57:19 dialing manager at localhost:44161 2023/06/19 17:57:19 checking machine... 2023/06/19 17:57:19 checking revisions... [ 79.349846] kmemleak: Automatic memory scanning thread ended 2023/06/19 17:57:20 testing simple program... [ 79.398978] cgroup: Unknown subsys name 'net' [ 79.456301] cgroup: Unknown subsys name 'rlimit' executing program executing program executing program VM DIAGNOSIS: 17:56:34 Registers: info registers vcpu 0 RAX=1ffffffff0c764f9 RBX=0000000000000001 RCX=ffffffff863b27c4 RDX=0000000000000000 RSI=dffffc0000000000 RDI=ffff88800d8f74f8 RBP=ffff88800d8f74e8 RSP=ffff88800d8f7420 R8 =ffffffff863b27c8 R9 =ffff88800d8f74d0 R10=0000000000038001 R11=000000000008ab54 R12=ffff88800d8f74f0 R13=ffff88800d8f74d8 R14=ffff88800d8f7e10 R15=ffff88800d8f7490 RIP=ffffffff81131118 RFL=00000216 [----AP-] 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 00007f2b78dc5900 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=00007f2b7937c618 CR3=0000000009ccc000 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=00007fd8a932d130 CR3=000000000cbb2000 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=c1c57a19d6ce328d2b455accb37ee4d9 XMM02=2c67c8bc2e329bc300000000001265b0 XMM03=fb795ef6d6577056000000000012dba8 XMM04=996a90fd89cdf97b00000000000ae988 XMM05=19e9129bd510f235000000000013d610 XMM06=4fda316b135da52b000000000013d498 XMM07=e042d86d42eb936e000000000012de28 XMM08=f027b6e31f7826e00000000000126610 XMM09=00000000000000000000000000000000 XMM10=00000000000000000000000000000000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000