syzkaller login: [ 31.638809] BUG: Bad rss-counter state mm:0000000047753ad5 type:MM_FILEPAGES val:33 [ 31.640020] BUG: Bad rss-counter state mm:0000000047753ad5 type:MM_ANONPAGES val:22 [ 31.681920] ================================================================== [ 31.682814] BUG: KASAN: slab-use-after-free in vma_interval_tree_remove+0xc75/0xec0 [ 31.683894] Read of size 8 at addr ffff888018273798 by task sshd/220 [ 31.684674] [ 31.684891] CPU: 1 PID: 220 Comm: sshd Not tainted 6.4.0-rc7-next-20230620 #1 [ 31.685751] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS 1.12.0-1 04/01/2014 [ 31.686726] Call Trace: [ 31.687042] [ 31.687325] dump_stack_lvl+0x91/0xf0 [ 31.687827] print_report+0xcc/0x620 [ 31.688308] ? __virt_addr_valid+0x102/0x340 [ 31.688861] ? vma_interval_tree_remove+0xc75/0xec0 [ 31.689478] ? vma_interval_tree_remove+0xc75/0xec0 [ 31.690089] kasan_report+0xbe/0xf0 [ 31.690562] ? vma_interval_tree_remove+0xc75/0xec0 [ 31.691181] vma_interval_tree_remove+0xc75/0xec0 [ 31.691811] vma_prepare+0xc54/0x11a0 [ 31.692304] __split_vma+0x5af/0x950 [ 31.692792] ? __pfx___split_vma+0x10/0x10 [ 31.693340] ? find_held_lock+0x2c/0x110 [ 31.693874] do_vmi_align_munmap+0x2ba/0x11f0 [ 31.694453] ? lock_is_held_type+0x9f/0x120 [ 31.695023] ? __pfx_do_vmi_align_munmap+0x10/0x10 [ 31.695676] ? mtree_range_walk+0x632/0x900 [ 31.696250] ? mas_walk+0x5c7/0x7c0 [ 31.696750] do_vmi_munmap+0x1f1/0x2b0 [ 31.697252] mmap_region+0x1f9/0x2660 [ 31.697747] ? vm_mmap_pgoff+0x15c/0x3a0 [ 31.698270] ? __pfx_arch_get_unmapped_area_topdown+0x10/0x10 [ 31.699014] ? __pfx_lock_acquire+0x10/0x10 [ 31.699580] ? __pfx_mmap_region+0x10/0x10 [ 31.700131] ? security_mmap_addr+0x7d/0xa0 [ 31.700680] ? get_unmapped_area+0x1f5/0x3f0 [ 31.701246] do_mmap+0x854/0xf00 [ 31.701700] vm_mmap_pgoff+0x1a6/0x3a0 [ 31.702212] ? __pfx_vm_mmap_pgoff+0x10/0x10 [ 31.702795] ksys_mmap_pgoff+0x3af/0x500 [ 31.703320] do_syscall_64+0x3f/0x90 [ 31.703824] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 31.704489] RIP: 0033:0x7f70b6b38d82 [ 31.704956] 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 [ 31.707156] RSP: 002b:00007ffc88516568 EFLAGS: 00000206 ORIG_RAX: 0000000000000009 [ 31.708130] RAX: ffffffffffffffda RBX: 0000000000000812 RCX: 00007f70b6b38d82 [ 31.709012] RDX: 0000000000000005 RSI: 0000000000001000 RDI: 00007f70b5f72000 [ 31.709886] RBP: 00007f70b5f72000 R08: 0000000000000009 R09: 0000000000001000 [ 31.710755] R10: 0000000000000812 R11: 0000000000000206 R12: 00005632b5e58b20 [ 31.711639] R13: 00007ffc88516580 R14: 00007ffc885165b0 R15: 00007ffc88516910 [ 31.712522] [ 31.712827] [ 31.713047] Allocated by task 213: [ 31.713490] kasan_save_stack+0x22/0x50 [ 31.714010] kasan_set_track+0x25/0x30 [ 31.714517] __kasan_slab_alloc+0x59/0x70 [ 31.715067] kmem_cache_alloc+0x16b/0x370 [ 31.715610] vm_area_dup+0x20/0x160 [ 31.716077] __split_vma+0x170/0x950 [ 31.716563] split_vma+0xc6/0x110 [ 31.717016] mprotect_fixup+0x8d2/0xb30 [ 31.717531] do_mprotect_pkey+0x87e/0xd40 [ 31.718069] __x64_sys_mprotect+0x78/0xc0 [ 31.718616] do_syscall_64+0x3f/0x90 [ 31.719104] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 31.719787] [ 31.720011] Freed by task 213: [ 31.720413] kasan_save_stack+0x22/0x50 [ 31.720934] kasan_set_track+0x25/0x30 [ 31.721449] kasan_save_free_info+0x2b/0x50 [ 31.721993] __kasan_slab_free+0x10a/0x190 [ 31.722540] kmem_cache_free+0x10d/0x4d0 [ 31.723059] rcu_core+0x8c8/0x2860 [ 31.723528] __do_softirq+0x1b7/0x7d4 [ 31.724022] [ 31.724245] Last potentially related work creation: [ 31.724846] kasan_save_stack+0x22/0x50 [ 31.725367] __kasan_record_aux_stack+0x8e/0xa0 [ 31.725959] __call_rcu_common.constprop.0+0x6a/0xb90 [ 31.726629] remove_vma+0x139/0x170 [ 31.727172] do_vmi_align_munmap+0xd4a/0x11f0 [ 31.727774] do_vmi_munmap+0x1f1/0x2b0 [ 31.728277] __vm_munmap+0x138/0x3a0 [ 31.728757] __x64_sys_munmap+0x59/0x80 [ 31.729275] do_syscall_64+0x3f/0x90 [ 31.729770] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 31.730432] [ 31.730654] The buggy address belongs to the object at ffff888018273740 [ 31.730654] which belongs to the cache vm_area_struct of size 168 [ 31.732179] The buggy address is located 88 bytes inside of [ 31.732179] freed 168-byte region [ffff888018273740, ffff8880182737e8) [ 31.733629] [ 31.733849] The buggy address belongs to the physical page: [ 31.734533] page:000000005a6446da refcount:1 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0x18273 [ 31.735705] memcg:ffff88800e29e701 [ 31.736141] flags: 0x100000000000200(slab|node=0|zone=1) [ 31.736805] page_type: 0xffffffff() [ 31.737269] raw: 0100000000000200 ffff8880087a0c80 dead000000000122 0000000000000000 [ 31.738221] raw: 0000000000000000 0000000000110011 00000001ffffffff ffff88800e29e701 [ 31.739158] page dumped because: kasan: bad access detected [ 31.739853] [ 31.740072] Memory state around the buggy address: [ 31.740678] ffff888018273680: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 [ 31.741558] ffff888018273700: fc fc fc fc fc fc fc fc fa fb fb fb fb fb fb fb [ 31.742435] >ffff888018273780: fb fb fb fb fb fb fb fb fb fb fb fb fb fc fc fc [ 31.743304] ^ [ 31.743829] ffff888018273800: fc fc fc fc fc fa fb fb fb fb fb fb fb fb fb fb [ 31.744710] ffff888018273880: fb fb fb fb fb fb fb fb fb fb fc fc fc fc fc fc [ 31.745583] ================================================================== [ 31.746563] Disabling lock debugging due to kernel taint [ 33.394730] BUG: Bad rss-counter state mm:00000000ee3f6bdc type:MM_FILEPAGES val:33 [ 33.395260] BUG: Bad rss-counter state mm:00000000ee3f6bdc type:MM_ANONPAGES val:22 [ 33.838270] BUG: Bad rss-counter state mm:0000000083b77843 type:MM_FILEPAGES val:33 [ 33.839554] BUG: Bad rss-counter state mm:0000000083b77843 type:MM_ANONPAGES val:22 Warning: Permanently added '[localhost]:10573' (ECDSA) to the list of known hosts. 2023/06/21 02:03:24 fuzzer started 2023/06/21 02:03:24 dialing manager at localhost:36067 2023/06/21 02:03:24 checking machine... 2023/06/21 02:03:24 checking revisions... [ 34.454474] kmemleak: Automatic memory scanning thread ended 2023/06/21 02:03:24 testing simple program... [ 34.493794] cgroup: Unknown subsys name 'net' [ 34.525253] cgroup: Unknown subsys name 'rlimit' executing program executing program executing program VM DIAGNOSIS: 02:03:24 Registers: info registers vcpu 0 RAX=dffffc0000000000 RBX=ffffffff84938620 RCX=0000000000000000 RDX=1ffffffff09270c4 RSI=ffffffff8186c0c0 RDI=0000000000000000 RBP=ffff88800eba9b80 RSP=ffff88801821fde0 R8 =0000000000000003 R9 =0000000000002000 R10=0000000000008000 R11=0000000000000000 R12=ffff88800eba9d18 R13=ffff88800eba9bd0 R14=0000000000008000 R15=ffff888016363e20 RIP=ffffffff8186c0de 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 00007ff441a01900 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=00007ff441fb90b0 CR3=000000000f940000 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=2034323a33303a3230203132206e754a XMM01=73732878696e755f6d6170203a5d3932 XMM02=65736f6c63206e6f6973736573203a29 XMM03=755f6d6170203a5d3932325b64687373 XMM04=69662068637573206f4e203a656c6163 XMM05=3a656c696620766e65206e65706f206f XMM06=65733a6468737328766e655f6d617020 XMM07=6b7a79732033323a33303a3230203132 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=ffffffff8451250e RDX=ffffed100d9e6a01 RSI=0000000000000004 RDI=ffffffff81288ac5 RBP=dffffc0000000000 RSP=ffff888008e07e70 R8 =0000000000000000 R9 =ffffed100d9e6a00 R10=ffff88806cf35003 R11=0000000000000001 R12=ffffffff85d3d350 R13=1ffff110011c0fd3 R14=0000000000000000 R15=0000000000000000 RIP=ffffffff8451349f 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=00007f9801c68000 CR3=000000000d96e000 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=a66a96283ab9be9fe9433b41bb681a43 XMM02=2c67c8bc2e329bc3000000000011aeb8 XMM03=fb795ef6d65770560000000000121b88 XMM04=e212b1a4e9914c0600000000000ae988 XMM05=f29c5b1e9e88983d0000000000132838 XMM06=4fda316b135da52b00000000001318d8 XMM07=e042d86d42eb936e0000000000121e08 XMM08=00b0f2b2b95b8db9000000000011af18 XMM09=00000000000000000000000000000000 XMM10=20200000000020202020202020200000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000