syzkaller login: [ 43.532465] BUG: Bad rss-counter state mm:0000000031620b2c type:MM_FILEPAGES val:33 [ 43.533871] BUG: Bad rss-counter state mm:0000000031620b2c type:MM_ANONPAGES val:22 [ 43.711700] ================================================================== [ 43.712283] BUG: KASAN: slab-use-after-free in vma_interval_tree_remove+0xc75/0xec0 [ 43.713070] Read of size 8 at addr ffff88800db2e6b0 by task sshd/223 [ 43.713557] [ 43.713698] CPU: 0 PID: 223 Comm: sshd Not tainted 6.4.0-rc7-next-20230619 #1 [ 43.714785] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS 1.12.0-1 04/01/2014 [ 43.715396] Call Trace: [ 43.715610] [ 43.715789] dump_stack_lvl+0x91/0xf0 [ 43.716097] print_report+0xcc/0x620 [ 43.716403] ? __virt_addr_valid+0x102/0x340 [ 43.716749] ? vma_interval_tree_remove+0xc75/0xec0 [ 43.719197] ? vma_interval_tree_remove+0xc75/0xec0 [ 43.719680] kasan_report+0xbe/0xf0 [ 43.720016] ? vma_interval_tree_remove+0xc75/0xec0 [ 43.720489] vma_interval_tree_remove+0xc75/0xec0 [ 43.722779] vma_prepare+0xc54/0x11a0 [ 43.723126] __split_vma+0x5af/0x950 [ 43.723470] ? __pfx___split_vma+0x10/0x10 [ 43.723878] ? find_held_lock+0x2c/0x110 [ 43.724246] do_vmi_align_munmap+0x2ba/0x11f0 [ 43.724650] ? lock_is_held_type+0x9f/0x120 [ 43.725289] ? __pfx_do_vmi_align_munmap+0x10/0x10 [ 43.725733] ? mtree_range_walk+0x632/0x900 [ 43.726127] ? mas_walk+0x5c7/0x7c0 [ 43.726466] do_vmi_munmap+0x1f1/0x2b0 [ 43.726813] mmap_region+0x1f9/0x2660 [ 43.727154] ? vm_mmap_pgoff+0x15c/0x3a0 [ 43.727524] ? __pfx_arch_get_unmapped_area_topdown+0x10/0x10 [ 43.728041] ? __pfx_lock_acquire+0x10/0x10 [ 43.728450] ? __pfx_mmap_region+0x10/0x10 [ 43.728947] ? security_mmap_addr+0x7d/0xa0 [ 43.729329] ? get_unmapped_area+0x1f5/0x3f0 [ 43.729723] do_mmap+0x854/0xf00 [ 43.730030] vm_mmap_pgoff+0x1a6/0x3a0 [ 43.730379] ? __pfx_vm_mmap_pgoff+0x10/0x10 [ 43.730820] ksys_mmap_pgoff+0x3af/0x500 [ 43.731183] do_syscall_64+0x3f/0x90 [ 43.731551] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 43.732019] RIP: 0033:0x7ff49dd8fd82 [ 43.732343] 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 [ 43.734051] RSP: 002b:00007ffdef5678c8 EFLAGS: 00000206 ORIG_RAX: 0000000000000009 [ 43.734720] RAX: ffffffffffffffda RBX: 0000000000000812 RCX: 00007ff49dd8fd82 [ 43.735328] RDX: 0000000000000005 RSI: 0000000000001000 RDI: 00007ff49d1c9000 [ 43.735956] RBP: 00007ff49d1c9000 R08: 0000000000000009 R09: 0000000000001000 [ 43.736595] R10: 0000000000000812 R11: 0000000000000206 R12: 0000563c8bcddec0 [ 43.737279] R13: 00007ffdef5678e0 R14: 00007ffdef567910 R15: 00007ffdef567c70 [ 43.737849] [ 43.738031] [ 43.738164] Allocated by task 214: [ 43.738430] kasan_save_stack+0x22/0x50 [ 43.738793] kasan_set_track+0x25/0x30 [ 43.739104] __kasan_slab_alloc+0x59/0x70 [ 43.739447] kmem_cache_alloc+0x16b/0x370 [ 43.739783] vm_area_dup+0x20/0x160 [ 43.740066] __split_vma+0x170/0x950 [ 43.740357] split_vma+0xc6/0x110 [ 43.740679] mprotect_fixup+0x8d2/0xb30 [ 43.741113] do_mprotect_pkey+0x87e/0xd40 [ 43.741442] __x64_sys_mprotect+0x78/0xc0 [ 43.741791] do_syscall_64+0x3f/0x90 [ 43.742086] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 43.742488] [ 43.742655] Freed by task 214: [ 43.742905] kasan_save_stack+0x22/0x50 [ 43.743263] kasan_set_track+0x25/0x30 [ 43.743653] kasan_save_free_info+0x2b/0x50 [ 43.744023] __kasan_slab_free+0x10a/0x190 [ 43.744403] kmem_cache_free+0x10d/0x4d0 [ 43.744777] rcu_core+0x8c8/0x2860 [ 43.745079] __do_softirq+0x1b7/0x7d4 [ 43.745423] [ 43.745593] Last potentially related work creation: [ 43.745987] kasan_save_stack+0x22/0x50 [ 43.746338] __kasan_record_aux_stack+0x8e/0xa0 [ 43.746798] __call_rcu_common.constprop.0+0x6a/0xb90 [ 43.747243] remove_vma+0x139/0x170 [ 43.747591] do_vmi_align_munmap+0xd4a/0x11f0 [ 43.747980] do_vmi_munmap+0x1f1/0x2b0 [ 43.748343] __vm_munmap+0x138/0x3a0 [ 43.748668] __x64_sys_munmap+0x59/0x80 [ 43.749011] do_syscall_64+0x3f/0x90 [ 43.749322] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 43.749774] [ 43.749909] The buggy address belongs to the object at ffff88800db2e658 [ 43.749909] which belongs to the cache vm_area_struct of size 168 [ 43.750858] The buggy address is located 88 bytes inside of [ 43.750858] freed 168-byte region [ffff88800db2e658, ffff88800db2e700) [ 43.751757] [ 43.751901] The buggy address belongs to the physical page: [ 43.752308] page:0000000015338685 refcount:1 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0xdb2e [ 43.753152] memcg:ffff88800ddfef01 [ 43.753426] flags: 0x100000000000200(slab|node=0|zone=1) [ 43.753857] page_type: 0xffffffff() [ 43.754139] raw: 0100000000000200 ffff88800879fc80 dead000000000100 dead000000000122 [ 43.754753] raw: 0000000000000000 0000000000110011 00000001ffffffff ffff88800ddfef01 [ 43.755310] page dumped because: kasan: bad access detected [ 43.755753] [ 43.755887] Memory state around the buggy address: [ 43.756246] ffff88800db2e580: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 [ 43.756828] ffff88800db2e600: 00 00 00 fc fc fc fc fc fc fc fc fa fb fb fb fb [ 43.757360] >ffff88800db2e680: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb [ 43.757918] ^ [ 43.758277] ffff88800db2e700: fc fc fc fc fc fc fc fc fa fb fb fb fb fb fb fb [ 43.758852] ffff88800db2e780: fb fb fb fb fb fb fb fb fb fb fb fb fb fc fc fc [ 43.759380] ================================================================== [ 43.760046] Disabling lock debugging due to kernel taint [ 50.549094] BUG: Bad rss-counter state mm:0000000059eb9ddc type:MM_FILEPAGES val:33 [ 50.550211] BUG: Bad rss-counter state mm:0000000059eb9ddc type:MM_ANONPAGES val:22 [ 51.940165] BUG: Bad rss-counter state mm:000000005cb1ac6b type:MM_FILEPAGES val:33 [ 51.940806] BUG: Bad rss-counter state mm:000000005cb1ac6b type:MM_ANONPAGES val:22 Warning: Permanently added '[localhost]:33614' (ECDSA) to the list of known hosts. 2023/06/20 10:20:06 fuzzer started 2023/06/20 10:20:06 dialing manager at localhost:44161 2023/06/20 10:20:06 checking machine... 2023/06/20 10:20:06 checking revisions... [ 52.910235] kmemleak: Automatic memory scanning thread ended 2023/06/20 10:20:06 testing simple program... [ 52.954961] cgroup: Unknown subsys name 'net' [ 53.000750] cgroup: Unknown subsys name 'rlimit' executing program executing program executing program VM DIAGNOSIS: 10:20:01 Registers: info registers vcpu 0 RAX=ffff88806ce35000 RBX=0000000000000000 RCX=ffffffff8450c50e RDX=ffffed100d9c6a01 RSI=0000000000000004 RDI=ffffffff812889a5 RBP=dffffc0000000000 RSP=ffffffff85407e10 R8 =0000000000000000 R9 =ffffed100d9c6a00 R10=ffff88806ce35003 R11=ffff888008c58000 R12=ffffffff85d3bed0 R13=1ffffffff0a80fc7 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 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=00007ffdf7848a48 CR3=000000000fa8e000 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=2035303a30323a3031203032206e754a XMM01=73732878696e755f6d6170203a5d3233 XMM02=65736f6c63206e6f6973736573203a29 XMM03=755f6d6170203a5d3233325b64687373 XMM04=69662068637573206f4e203a656c6163 XMM05=3a656c696620766e65206e65706f206f XMM06=65733a6468737328766e655f6d617020 XMM07=6b7a79732035303a30323a3031203032 XMM08=3d656e696c646d632022656369767265 XMM09=00000000000000000000000000000000 XMM10=00000000000000000000000000000000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000 info registers vcpu 1 RAX=0000000000000000 RBX=0000000000000000 RCX=0000000000000000 RDX=ffff88800d003680 RSI=ffffffff814c8504 RDI=ffff88800d003a74 RBP=0000000000000000 RSP=ffff88800fcbf520 R8 =0000000000000005 R9 =0000000000000000 R10=0000000000000000 R11=00000000000b6996 R12=0000000000000000 R13=0000000000000000 R14=ffffffff85652988 R15=0000000000000cc0 RIP=ffffffff814c081b 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 00007fe801d98900 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=00007faf05944328 CR3=000000000c948000 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=ffffffffffff00000000000000000000 XMM02=ffffffffffff00000000000000000000 XMM03=00000000000000000000000000000000 XMM04=00000000000000000000000000000000 XMM05=00000000000000000000000000000000 XMM06=00000000000000000000000000000000 XMM07=00000000000000000000000000000000 XMM08=00000000000073707574726174732064 XMM09=00000000000000000000000000000000 XMM10=00000000000000000000000000000000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000