syzkaller login: [ 32.469345] BUG: Bad rss-counter state mm:00000000eca7bdd3 type:MM_FILEPAGES val:33 [ 32.470343] BUG: Bad rss-counter state mm:00000000eca7bdd3 type:MM_ANONPAGES val:22 [ 32.641090] ================================================================== [ 32.642015] BUG: KASAN: slab-use-after-free in vma_interval_tree_remove+0xc75/0xec0 [ 32.642956] Read of size 8 at addr ffff888015eddc20 by task sshd/220 [ 32.643849] [ 32.644071] CPU: 0 PID: 220 Comm: sshd Not tainted 6.4.0-rc7-next-20230619 #1 [ 32.644952] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS 1.12.0-1 04/01/2014 [ 32.645947] Call Trace: [ 32.646270] [ 32.646559] dump_stack_lvl+0x91/0xf0 [ 32.647054] print_report+0xcc/0x620 [ 32.647542] ? __virt_addr_valid+0x102/0x340 [ 32.648120] ? vma_interval_tree_remove+0xc75/0xec0 [ 32.648742] ? vma_interval_tree_remove+0xc75/0xec0 [ 32.649361] kasan_report+0xbe/0xf0 [ 32.649834] ? vma_interval_tree_remove+0xc75/0xec0 [ 32.650465] vma_interval_tree_remove+0xc75/0xec0 [ 32.651068] vma_prepare+0xc54/0x11a0 [ 32.651546] __split_vma+0x5af/0x950 [ 32.652026] ? __pfx___split_vma+0x10/0x10 [ 32.652554] ? find_held_lock+0x2c/0x110 [ 32.653073] do_vmi_align_munmap+0x2ba/0x11f0 [ 32.653652] ? lock_is_held_type+0x9f/0x120 [ 32.654186] ? __pfx_do_vmi_align_munmap+0x10/0x10 [ 32.654794] ? mtree_range_walk+0x632/0x900 [ 32.655342] ? mas_walk+0x5c7/0x7c0 [ 32.655827] do_vmi_munmap+0x1f1/0x2b0 [ 32.656317] mmap_region+0x1f9/0x2660 [ 32.656803] ? vm_mmap_pgoff+0x15c/0x3a0 [ 32.657315] ? __pfx_arch_get_unmapped_area_topdown+0x10/0x10 [ 32.658037] ? __pfx_lock_acquire+0x10/0x10 [ 32.658571] ? __pfx_mmap_region+0x10/0x10 [ 32.659099] ? security_mmap_addr+0x7d/0xa0 [ 32.659632] ? get_unmapped_area+0x1f5/0x3f0 [ 32.660209] do_mmap+0x854/0xf00 [ 32.660654] vm_mmap_pgoff+0x1a6/0x3a0 [ 32.661151] ? __pfx_vm_mmap_pgoff+0x10/0x10 [ 32.661710] ksys_mmap_pgoff+0x3af/0x500 [ 32.662219] do_syscall_64+0x3f/0x90 [ 32.662704] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 32.663345] RIP: 0033:0x7f02650a7d82 [ 32.663813] 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 [ 32.665933] RSP: 002b:00007ffe99047708 EFLAGS: 00000206 ORIG_RAX: 0000000000000009 [ 32.666841] RAX: ffffffffffffffda RBX: 0000000000000812 RCX: 00007f02650a7d82 [ 32.667692] RDX: 0000000000000005 RSI: 0000000000001000 RDI: 00007f02644e1000 [ 32.668544] RBP: 00007f02644e1000 R08: 0000000000000009 R09: 0000000000001000 [ 32.669391] R10: 0000000000000812 R11: 0000000000000206 R12: 000055bb25ec9ec0 [ 32.670240] R13: 00007ffe99047720 R14: 00007ffe99047750 R15: 00007ffe99047ab0 [ 32.671097] [ 32.671393] [ 32.671614] Allocated by task 213: [ 32.672055] kasan_save_stack+0x22/0x50 [ 32.672563] kasan_set_track+0x25/0x30 [ 32.673058] __kasan_slab_alloc+0x59/0x70 [ 32.673587] kmem_cache_alloc+0x16b/0x370 [ 32.674100] vm_area_dup+0x20/0x160 [ 32.674561] __split_vma+0x170/0x950 [ 32.675027] split_vma+0xc6/0x110 [ 32.675473] mprotect_fixup+0x8d2/0xb30 [ 32.675979] do_mprotect_pkey+0x87e/0xd40 [ 32.676500] __x64_sys_mprotect+0x78/0xc0 [ 32.677026] do_syscall_64+0x3f/0x90 [ 32.677500] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 32.678144] [ 32.678361] Freed by task 203: [ 32.678753] kasan_save_stack+0x22/0x50 [ 32.679257] kasan_set_track+0x25/0x30 [ 32.679749] kasan_save_free_info+0x2b/0x50 [ 32.680295] __kasan_slab_free+0x10a/0x190 [ 32.680826] kmem_cache_free+0x10d/0x4d0 [ 32.681333] rcu_core+0x8c8/0x2860 [ 32.681780] __do_softirq+0x1b7/0x7d4 [ 32.682259] [ 32.682477] Last potentially related work creation: [ 32.683061] kasan_save_stack+0x22/0x50 [ 32.683565] __kasan_record_aux_stack+0x8e/0xa0 [ 32.684154] __call_rcu_common.constprop.0+0x6a/0xb90 [ 32.684801] remove_vma+0x139/0x170 [ 32.685258] do_vmi_align_munmap+0xd4a/0x11f0 [ 32.685825] do_vmi_munmap+0x1f1/0x2b0 [ 32.686314] __vm_munmap+0x138/0x3a0 [ 32.686791] __x64_sys_munmap+0x59/0x80 [ 32.687287] do_syscall_64+0x3f/0x90 [ 32.687764] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 32.688420] [ 32.688638] The buggy address belongs to the object at ffff888015eddbc8 [ 32.688638] which belongs to the cache vm_area_struct of size 168 [ 32.690158] The buggy address is located 88 bytes inside of [ 32.690158] freed 168-byte region [ffff888015eddbc8, ffff888015eddc70) [ 32.691582] [ 32.691804] The buggy address belongs to the physical page: [ 32.692471] page:000000005ee0ce68 refcount:1 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0x15edd [ 32.693572] memcg:ffff88800c685401 [ 32.694000] flags: 0x100000000000200(slab|node=0|zone=1) [ 32.694644] page_type: 0xffffffff() [ 32.695095] raw: 0100000000000200 ffff88800879fc80 dead000000000122 0000000000000000 [ 32.696019] raw: 0000000000000000 0000000000110011 00000001ffffffff ffff88800c685401 [ 32.696948] page dumped because: kasan: bad access detected [ 32.697606] [ 32.697824] Memory state around the buggy address: [ 32.698406] ffff888015eddb00: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 [ 32.699260] ffff888015eddb80: 00 fc fc fc fc fc fc fc fc fa fb fb fb fb fb fb [ 32.700143] >ffff888015eddc00: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fc fc [ 32.700992] ^ [ 32.701523] ffff888015eddc80: fc fc fc fc fc fc fa fb fb fb fb fb fb fb fb fb [ 32.702379] ffff888015eddd00: fb fb fb fb fb fb fb fb fb fb fb fc fc fc fc fc [ 32.703233] ================================================================== [ 32.704316] Disabling lock debugging due to kernel taint [ 35.664453] BUG: Bad rss-counter state mm:000000006f96f0c0 type:MM_FILEPAGES val:33 [ 35.665616] BUG: Bad rss-counter state mm:000000006f96f0c0 type:MM_ANONPAGES val:22 [ 36.095460] BUG: Bad rss-counter state mm:00000000575f013b type:MM_FILEPAGES val:31 [ 36.096455] BUG: Bad rss-counter state mm:00000000575f013b type:MM_ANONPAGES val:22 Warning: Permanently added '[localhost]:32887' (ECDSA) to the list of known hosts. 2023/06/20 00:20:53 fuzzer started 2023/06/20 00:20:53 dialing manager at localhost:44161 2023/06/20 00:20:53 checking machine... 2023/06/20 00:20:53 checking revisions... [ 36.814746] kmemleak: Automatic memory scanning thread ended 2023/06/20 00:20:53 testing simple program... [ 36.856776] cgroup: Unknown subsys name 'net' [ 36.912032] cgroup: Unknown subsys name 'rlimit' executing program executing program executing program VM DIAGNOSIS: 00:20:52 Registers: info registers vcpu 0 RAX=0000000080010000 RBX=dffffc0000000000 RCX=0000000000000000 RDX=0000000000000000 RSI=ffffffff81410541 RDI=0000000000000001 RBP=ffff88800ff4d200 RSP=ffff88806ce09f98 R8 =0000000000000001 R9 =0000000000000000 R10=0000000000000001 R11=ffff88806ce09ff8 R12=0000000000000000 R13=0000000000000000 R14=0000000000000030 R15=ffff88800ff4d1f8 RIP=ffffffff81410575 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 00007fc90ec24900 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=00007fc90f1db618 CR3=000000000c58a000 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=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=00007f2dab800000 CR3=000000000c4b8000 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=5bf4e7bce0a994933647225efda15743 XMM02=2c67c8bc2e329bc3000000000011dab8 XMM03=fb795ef6d65770560000000000124f58 XMM04=6712807bb541c6d700000000000ae988 XMM05=e4cb8bb95a7664b60000000000134aa8 XMM06=4800208cab26a0650000000000133910 XMM07=e042d86d42eb936e00000000001251d8 XMM08=ebf92e83ddc6106c000000000011db18 XMM09=00000000000000000000000000000000 XMM10=00000000000000000000000000000000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000