syzkaller login: [ 49.898463] BUG: Bad rss-counter state mm:000000002d8fc65a type:MM_FILEPAGES val:33 [ 49.900046] BUG: Bad rss-counter state mm:000000002d8fc65a type:MM_ANONPAGES val:22 [ 50.046130] ================================================================== [ 50.047374] BUG: KASAN: slab-use-after-free in vma_interval_tree_remove+0xc75/0xec0 [ 50.048846] Read of size 8 at addr ffff88800ec52a50 by task sshd/228 [ 50.049909] [ 50.050300] CPU: 1 PID: 228 Comm: sshd Not tainted 6.4.0-rc7-next-20230619 #1 [ 50.051523] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS 1.12.0-1 04/01/2014 [ 50.052881] Call Trace: [ 50.053325] [ 50.053722] dump_stack_lvl+0x91/0xf0 [ 50.054406] print_report+0xcc/0x620 [ 50.055083] ? __virt_addr_valid+0x102/0x340 [ 50.055864] ? vma_interval_tree_remove+0xc75/0xec0 [ 50.056724] ? vma_interval_tree_remove+0xc75/0xec0 [ 50.057584] kasan_report+0xbe/0xf0 [ 50.058251] ? vma_interval_tree_remove+0xc75/0xec0 [ 50.059116] vma_interval_tree_remove+0xc75/0xec0 [ 50.059989] vma_prepare+0xc54/0x11a0 [ 50.060623] __split_vma+0x5af/0x950 [ 50.061186] ? __pfx___split_vma+0x10/0x10 [ 50.061820] ? find_held_lock+0x2c/0x110 [ 50.062437] do_vmi_align_munmap+0x2ba/0x11f0 [ 50.063115] ? lock_is_held_type+0x9f/0x120 [ 50.063765] ? __pfx_do_vmi_align_munmap+0x10/0x10 [ 50.064491] ? mtree_range_walk+0x632/0x900 [ 50.065145] ? mas_walk+0x5c7/0x7c0 [ 50.065705] do_vmi_munmap+0x1f1/0x2b0 [ 50.066283] mmap_region+0x1f9/0x2660 [ 50.066853] ? vm_mmap_pgoff+0x15c/0x3a0 [ 50.067454] ? __pfx_arch_get_unmapped_area_topdown+0x10/0x10 [ 50.068325] ? __pfx_lock_acquire+0x10/0x10 [ 50.068960] ? __pfx_mmap_region+0x10/0x10 [ 50.069586] ? security_mmap_addr+0x7d/0xa0 [ 50.070227] ? get_unmapped_area+0x1f5/0x3f0 [ 50.070887] do_mmap+0x854/0xf00 [ 50.071415] vm_mmap_pgoff+0x1a6/0x3a0 [ 50.072016] ? __pfx_vm_mmap_pgoff+0x10/0x10 [ 50.072683] ksys_mmap_pgoff+0x3af/0x500 [ 50.073288] do_syscall_64+0x3f/0x90 [ 50.073852] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 50.074618] RIP: 0033:0x7f9b1f6e2d82 [ 50.075160] 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 [ 50.077696] RSP: 002b:00007fffd96e3f88 EFLAGS: 00000206 ORIG_RAX: 0000000000000009 [ 50.078775] RAX: ffffffffffffffda RBX: 0000000000000812 RCX: 00007f9b1f6e2d82 [ 50.079791] RDX: 0000000000000005 RSI: 0000000000001000 RDI: 00007f9b1eb1c000 [ 50.080785] RBP: 00007f9b1eb1c000 R08: 0000000000000009 R09: 0000000000001000 [ 50.081785] R10: 0000000000000812 R11: 0000000000000206 R12: 0000557b9700aec0 [ 50.082784] R13: 00007fffd96e3fa0 R14: 00007fffd96e3fd0 R15: 00007fffd96e4330 [ 50.083799] [ 50.084147] [ 50.084401] Allocated by task 221: [ 50.084907] kasan_save_stack+0x22/0x50 [ 50.085502] kasan_set_track+0x25/0x30 [ 50.086079] __kasan_slab_alloc+0x59/0x70 [ 50.086695] kmem_cache_alloc+0x16b/0x370 [ 50.087301] vm_area_dup+0x20/0x160 [ 50.087856] __split_vma+0x170/0x950 [ 50.088408] split_vma+0xc6/0x110 [ 50.088923] mprotect_fixup+0x8d2/0xb30 [ 50.089518] do_mprotect_pkey+0x87e/0xd40 [ 50.090133] __x64_sys_mprotect+0x78/0xc0 [ 50.090748] do_syscall_64+0x3f/0x90 [ 50.091308] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 50.092064] [ 50.092318] Freed by task 19: [ 50.092766] kasan_save_stack+0x22/0x50 [ 50.093353] kasan_set_track+0x25/0x30 [ 50.093933] kasan_save_free_info+0x2b/0x50 [ 50.094551] __kasan_slab_free+0x10a/0x190 [ 50.095198] kmem_cache_free+0x10d/0x4d0 [ 50.095786] rcu_core+0x8c8/0x2860 [ 50.096292] __do_softirq+0x1b7/0x7d4 [ 50.096856] [ 50.097110] Last potentially related work creation: [ 50.097766] kasan_save_stack+0x22/0x50 [ 50.098336] __kasan_record_aux_stack+0x8e/0xa0 [ 50.098982] __call_rcu_common.constprop.0+0x6a/0xb90 [ 50.099737] remove_vma+0x139/0x170 [ 50.100258] do_vmi_align_munmap+0xd4a/0x11f0 [ 50.100889] do_vmi_munmap+0x1f1/0x2b0 [ 50.101435] __vm_munmap+0x138/0x3a0 [ 50.101962] __x64_sys_munmap+0x59/0x80 [ 50.102525] do_syscall_64+0x3f/0x90 [ 50.103059] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 50.103808] [ 50.104059] The buggy address belongs to the object at ffff88800ec529f8 [ 50.104059] which belongs to the cache vm_area_struct of size 168 [ 50.105788] The buggy address is located 88 bytes inside of [ 50.105788] freed 168-byte region [ffff88800ec529f8, ffff88800ec52aa0) [ 50.107424] [ 50.107695] The buggy address belongs to the physical page: [ 50.108461] page:00000000a43d782a refcount:1 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0xec52 [ 50.109738] memcg:ffff888018dc7a01 [ 50.110235] flags: 0x100000000000200(slab|node=0|zone=1) [ 50.110982] page_type: 0xffffffff() [ 50.111526] raw: 0100000000000200 ffff88800879fc80 dead000000000122 0000000000000000 [ 50.112607] raw: 0000000000000000 0000000000110011 00000001ffffffff ffff888018dc7a01 [ 50.113665] page dumped because: kasan: bad access detected [ 50.114442] [ 50.114696] Memory state around the buggy address: [ 50.115374] ffff88800ec52900: fc fc 00 00 00 00 00 00 00 00 00 00 00 00 00 00 [ 50.116421] ffff88800ec52980: 00 00 00 00 00 00 00 fc fc fc fc fc fc fc fc fa [ 50.117421] >ffff88800ec52a00: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb [ 50.118415] ^ [ 50.119237] ffff88800ec52a80: fb fb fb fb fc fc fc fc fc fc fc fc fa fb fb fb [ 50.120256] ffff88800ec52b00: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb [ 50.121248] ================================================================== [ 50.122542] Disabling lock debugging due to kernel taint [ 52.059658] BUG: Bad rss-counter state mm:00000000f55cb37f type:MM_FILEPAGES val:33 [ 52.060813] BUG: Bad rss-counter state mm:00000000f55cb37f type:MM_ANONPAGES val:22 [ 52.589309] BUG: Bad rss-counter state mm:000000006185521e type:MM_FILEPAGES val:33 [ 52.590765] BUG: Bad rss-counter state mm:000000006185521e type:MM_ANONPAGES val:22 Warning: Permanently added '[localhost]:55792' (ECDSA) to the list of known hosts. 2023/06/19 19:22:53 fuzzer started 2023/06/19 19:22:53 dialing manager at localhost:44161 2023/06/19 19:22:53 checking machine... 2023/06/19 19:22:53 checking revisions... [ 53.250174] kmemleak: Automatic memory scanning thread ended 2023/06/19 19:22:53 testing simple program... [ 53.286231] cgroup: Unknown subsys name 'net' [ 53.325721] cgroup: Unknown subsys name 'rlimit' executing program executing program executing program VM DIAGNOSIS: 19:22:42 Registers: info registers vcpu 0 RAX=0000000000000000 RBX=0000000000000000 RCX=ffffffff819788b0 RDX=ffff8880158db680 RSI=0000000000000000 RDI=0000000000000005 RBP=0000000000000001 RSP=ffff88800ed778c0 R8 =0000000000000005 R9 =0000000000001000 R10=0000000000000b1b R11=00000000000b6996 R12=ffffea00005e8ac0 R13=0000000000000000 R14=0000000000000b1b R15=0000000000000000 RIP=ffffffff814c07e4 RFL=00000287 [--S--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 =0018 0000000000000000 ffffffff 00c09300 DPL=0 DS [-WA] DS =0000 0000000000000000 00000000 00000000 FS =0000 00007f4d58e54700 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=00007fd290045ec0 CR3=0000000015988000 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=2033353a32323a3931203931206e754a XMM01=73732878696e755f6d6170203a5d3733 XMM02=65736f6c63206e6f6973736573203a29 XMM03=755f6d6170203a5d3733325b64687373 XMM04=69662068637573206f4e203a656c6163 XMM05=3a656c696620766e65206e65706f206f XMM06=65733a6468737328766e655f6d617020 XMM07=6b7a79732032353a32323a3931203931 XMM08=3d656e696c646d632022656369767265 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=00007ffc9cd2c000 CR3=000000000e4f8000 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=635f6e6f69737365733a4d41503d706f XMM01=6f6c5f6d61702c78756e696c65735f6d XMM02=61702c74696d7265705f6d61702c7469 XMM03=655f6d61702c7374696d696c5f6d6170 XMM04=3d6c616e696d72657420322e322e302e XMM05=3d656d616e74736f682022646873732f XMM06=746f6f72223d746363612078756e696c XMM07=6e655f6d61702c7374696d696c5f6d61 XMM08=652075253d64692073253d706f000000 XMM09=00000000000000000000000000000000 XMM10=00000000000000000000000000000000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000