syzkaller login: [ 33.668730] BUG: Bad rss-counter state mm:000000003733c3f6 type:MM_FILEPAGES val:33 [ 33.669934] BUG: Bad rss-counter state mm:000000003733c3f6 type:MM_ANONPAGES val:22 [ 33.814934] ================================================================== [ 33.816015] BUG: KASAN: slab-use-after-free in vma_interval_tree_remove+0xc75/0xec0 [ 33.817155] Read of size 8 at addr ffff88800ea17058 by task sshd/219 [ 33.818074] [ 33.818287] CPU: 1 PID: 219 Comm: sshd Not tainted 6.4.0-rc7-next-20230619 #1 [ 33.819146] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS 1.12.0-1 04/01/2014 [ 33.820117] Call Trace: [ 33.820439] [ 33.820723] dump_stack_lvl+0x91/0xf0 [ 33.821227] print_report+0xcc/0x620 [ 33.821707] ? __virt_addr_valid+0x102/0x340 [ 33.822258] ? vma_interval_tree_remove+0xc75/0xec0 [ 33.822872] ? vma_interval_tree_remove+0xc75/0xec0 [ 33.823485] kasan_report+0xbe/0xf0 [ 33.823961] ? vma_interval_tree_remove+0xc75/0xec0 [ 33.824578] vma_interval_tree_remove+0xc75/0xec0 [ 33.825196] vma_prepare+0xc54/0x11a0 [ 33.825673] __split_vma+0x5af/0x950 [ 33.826134] ? __pfx___split_vma+0x10/0x10 [ 33.826648] ? find_held_lock+0x2c/0x110 [ 33.827159] do_vmi_align_munmap+0x2ba/0x11f0 [ 33.827713] ? lock_is_held_type+0x9f/0x120 [ 33.828244] ? __pfx_do_vmi_align_munmap+0x10/0x10 [ 33.828844] ? mtree_range_walk+0x632/0x900 [ 33.829389] ? mas_walk+0x5c7/0x7c0 [ 33.829854] do_vmi_munmap+0x1f1/0x2b0 [ 33.830343] mmap_region+0x1f9/0x2660 [ 33.830817] ? vm_mmap_pgoff+0x15c/0x3a0 [ 33.831317] ? __pfx_arch_get_unmapped_area_topdown+0x10/0x10 [ 33.832020] ? __pfx_lock_acquire+0x10/0x10 [ 33.832545] ? __pfx_mmap_region+0x10/0x10 [ 33.833074] ? security_mmap_addr+0x7d/0xa0 [ 33.833595] ? get_unmapped_area+0x1f5/0x3f0 [ 33.834144] do_mmap+0x854/0xf00 [ 33.834574] vm_mmap_pgoff+0x1a6/0x3a0 [ 33.835066] ? __pfx_vm_mmap_pgoff+0x10/0x10 [ 33.835618] ksys_mmap_pgoff+0x3af/0x500 [ 33.836117] do_syscall_64+0x3f/0x90 [ 33.836584] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 33.837237] RIP: 0033:0x7f734504dd82 [ 33.837690] 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 [ 33.839791] RSP: 002b:00007ffc36f4a058 EFLAGS: 00000206 ORIG_RAX: 0000000000000009 [ 33.840699] RAX: ffffffffffffffda RBX: 0000000000000812 RCX: 00007f734504dd82 [ 33.841541] RDX: 0000000000000005 RSI: 0000000000001000 RDI: 00007f7344487000 [ 33.842368] RBP: 00007f7344487000 R08: 0000000000000009 R09: 0000000000001000 [ 33.843204] R10: 0000000000000812 R11: 0000000000000206 R12: 000056399393c980 [ 33.844035] R13: 00007ffc36f4a070 R14: 00007ffc36f4a0a0 R15: 00007ffc36f4a400 [ 33.844891] [ 33.845196] [ 33.845406] Allocated by task 212: [ 33.845831] kasan_save_stack+0x22/0x50 [ 33.846329] kasan_set_track+0x25/0x30 [ 33.846815] __kasan_slab_alloc+0x59/0x70 [ 33.847331] kmem_cache_alloc+0x16b/0x370 [ 33.847841] vm_area_dup+0x20/0x160 [ 33.848294] __split_vma+0x170/0x950 [ 33.848749] split_vma+0xc6/0x110 [ 33.849199] mprotect_fixup+0x8d2/0xb30 [ 33.849693] do_mprotect_pkey+0x87e/0xd40 [ 33.850204] __x64_sys_mprotect+0x78/0xc0 [ 33.850729] do_syscall_64+0x3f/0x90 [ 33.851198] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 33.851833] [ 33.852045] Freed by task 212: [ 33.852428] kasan_save_stack+0x22/0x50 [ 33.852924] kasan_set_track+0x25/0x30 [ 33.853413] kasan_save_free_info+0x2b/0x50 [ 33.853937] __kasan_slab_free+0x10a/0x190 [ 33.854461] kmem_cache_free+0x10d/0x4d0 [ 33.854966] rcu_core+0x8c8/0x2860 [ 33.855401] __do_softirq+0x1b7/0x7d4 [ 33.855878] [ 33.856090] Last potentially related work creation: [ 33.856667] kasan_save_stack+0x22/0x50 [ 33.857167] __kasan_record_aux_stack+0x8e/0xa0 [ 33.857732] __call_rcu_common.constprop.0+0x6a/0xb90 [ 33.858367] remove_vma+0x139/0x170 [ 33.858812] do_vmi_align_munmap+0xd4a/0x11f0 [ 33.859406] do_vmi_munmap+0x1f1/0x2b0 [ 33.859889] __vm_munmap+0x138/0x3a0 [ 33.860353] __x64_sys_munmap+0x59/0x80 [ 33.860842] do_syscall_64+0x3f/0x90 [ 33.861314] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 33.861947] [ 33.862157] The buggy address belongs to the object at ffff88800ea17000 [ 33.862157] which belongs to the cache vm_area_struct of size 168 [ 33.863596] The buggy address is located 88 bytes inside of [ 33.863596] freed 168-byte region [ffff88800ea17000, ffff88800ea170a8) [ 33.864980] [ 33.865197] The buggy address belongs to the physical page: [ 33.865863] page:000000001b568e08 refcount:1 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0xea17 [ 33.866934] memcg:ffff88800e6e4d01 [ 33.867360] anon flags: 0x100000000000200(slab|node=0|zone=1) [ 33.868063] page_type: 0xffffffff() [ 33.868508] raw: 0100000000000200 ffff88800879fc80 ffffea000039a140 dead000000000003 [ 33.869442] raw: 0000000000000000 0000000000110011 00000001ffffffff ffff88800e6e4d01 [ 33.870345] page dumped because: kasan: bad access detected [ 33.871007] [ 33.871219] Memory state around the buggy address: [ 33.871807] ffff88800ea16f00: 00 00 00 00 00 00 fc fc fc fc fc fc fc fc fc fc [ 33.872665] ffff88800ea16f80: fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc [ 33.873516] >ffff88800ea17000: fa fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb [ 33.874360] ^ [ 33.875073] ffff88800ea17080: fb fb fb fb fb fc fc fc fc fc fc fc fc 00 00 00 [ 33.875916] ffff88800ea17100: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 [ 33.876749] ================================================================== [ 33.877664] Disabling lock debugging due to kernel taint [ 35.857552] BUG: Bad rss-counter state mm:0000000095a3b5ab type:MM_FILEPAGES val:33 [ 35.858765] BUG: Bad rss-counter state mm:0000000095a3b5ab type:MM_ANONPAGES val:22 [ 36.362341] BUG: Bad rss-counter state mm:000000008ee054fe type:MM_FILEPAGES val:33 [ 36.363506] BUG: Bad rss-counter state mm:000000008ee054fe type:MM_ANONPAGES val:22 Warning: Permanently added '[localhost]:18149' (ECDSA) to the list of known hosts. 2023/06/20 09:22:41 fuzzer started 2023/06/20 09:22:41 dialing manager at localhost:44161 2023/06/20 09:22:41 checking machine... 2023/06/20 09:22:41 checking revisions... [ 37.099195] kmemleak: Automatic memory scanning thread ended 2023/06/20 09:22:41 testing simple program... [ 37.152874] cgroup: Unknown subsys name 'net' [ 37.223532] cgroup: Unknown subsys name 'rlimit' executing program executing program executing program VM DIAGNOSIS: 09:22:39 Registers: info registers vcpu 0 RAX=1ffffffff0b4c741 RBX=00000000fffffffe RCX=0000000000000000 RDX=ffff8880165ad1c0 RSI=ffffffff81210e19 RDI=ffffffff85a63a08 RBP=ffffffff85a63a00 RSP=ffff88801ca97c00 R8 =0000000000000005 R9 =0000000000000000 R10=00000000fffffffe R11=00000000000b6996 R12=0000000000000000 R13=dffffc0000000000 R14=ffffffff85a63a00 R15=0000000000000000 RIP=ffffffff81210e29 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 00007f1e9bfce900 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=00007f1e9c585618 CR3=000000000df5a000 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=563412feff00545000000000000080fe 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=00007fa62e746c30 CR3=000000000ce64000 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=15f2261392ac26ba314131c1a1107151 XMM02=2c67c8bc2e329bc3000000000011d858 XMM03=fb795ef6d657705600000000001241f8 XMM04=12277e34d9300e0f00000000000ae988 XMM05=ed6c9f61e20f66790000000000134bf8 XMM06=806171799158d9670000000000133928 XMM07=e042d86d42eb936e00000000001244d0 XMM08=47c3c34a4c73d671000000000011d8b8 XMM09=00000000000000000000000000000000 XMM10=00000000000000000000000000000000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000