syzkaller login: [ 33.377765] BUG: Bad rss-counter state mm:00000000253ae5f5 type:MM_FILEPAGES val:33 [ 33.378973] BUG: Bad rss-counter state mm:00000000253ae5f5 type:MM_ANONPAGES val:22 [ 33.420257] ================================================================== [ 33.421347] BUG: KASAN: slab-use-after-free in vma_interval_tree_remove+0xc75/0xec0 [ 33.422495] Read of size 8 at addr ffff888015fce140 by task sshd/220 [ 33.423454] [ 33.423731] CPU: 1 PID: 220 Comm: sshd Not tainted 6.4.0-rc7-next-20230619 #1 [ 33.424726] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS 1.12.0-1 04/01/2014 [ 33.425933] Call Trace: [ 33.426290] [ 33.426632] dump_stack_lvl+0x91/0xf0 [ 33.427239] print_report+0xcc/0x620 [ 33.427813] ? __virt_addr_valid+0x102/0x340 [ 33.428477] ? vma_interval_tree_remove+0xc75/0xec0 [ 33.429209] ? vma_interval_tree_remove+0xc75/0xec0 [ 33.429839] kasan_report+0xbe/0xf0 [ 33.430512] ? vma_interval_tree_remove+0xc75/0xec0 [ 33.431191] vma_interval_tree_remove+0xc75/0xec0 [ 33.431817] vma_prepare+0xc54/0x11a0 [ 33.432356] __split_vma+0x5af/0x950 [ 33.433000] ? __pfx___split_vma+0x10/0x10 [ 33.433574] ? find_held_lock+0x2c/0x110 [ 33.434322] do_vmi_align_munmap+0x2ba/0x11f0 [ 33.435052] ? lock_is_held_type+0x9f/0x120 [ 33.435630] ? __pfx_do_vmi_align_munmap+0x10/0x10 [ 33.436299] ? mtree_range_walk+0x632/0x900 [ 33.436901] ? mas_walk+0x5c7/0x7c0 [ 33.437454] do_vmi_munmap+0x1f1/0x2b0 [ 33.438109] mmap_region+0x1f9/0x2660 [ 33.438644] ? vm_mmap_pgoff+0x15c/0x3a0 [ 33.439167] ? __pfx_arch_get_unmapped_area_topdown+0x10/0x10 [ 33.439897] ? __pfx_lock_acquire+0x10/0x10 [ 33.440429] ? __pfx_mmap_region+0x10/0x10 [ 33.440976] ? security_mmap_addr+0x7d/0xa0 [ 33.441516] ? get_unmapped_area+0x1f5/0x3f0 [ 33.442062] do_mmap+0x854/0xf00 [ 33.442504] vm_mmap_pgoff+0x1a6/0x3a0 [ 33.442999] ? __pfx_vm_mmap_pgoff+0x10/0x10 [ 33.443563] ksys_mmap_pgoff+0x3af/0x500 [ 33.444067] do_syscall_64+0x3f/0x90 [ 33.444563] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 33.445256] RIP: 0033:0x7f4944386d82 [ 33.445716] 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 [ 33.447828] RSP: 002b:00007ffeea147b78 EFLAGS: 00000206 ORIG_RAX: 0000000000000009 [ 33.448735] RAX: ffffffffffffffda RBX: 0000000000000812 RCX: 00007f4944386d82 [ 33.449601] RDX: 0000000000000005 RSI: 0000000000001000 RDI: 00007f49437c0000 [ 33.450460] RBP: 00007f49437c0000 R08: 0000000000000009 R09: 0000000000001000 [ 33.451307] R10: 0000000000000812 R11: 0000000000000206 R12: 000056162b5f0ec0 [ 33.452150] R13: 00007ffeea147b90 R14: 00007ffeea147bc0 R15: 00007ffeea147f20 [ 33.453011] [ 33.453307] [ 33.453525] Allocated by task 213: [ 33.453949] kasan_save_stack+0x22/0x50 [ 33.454451] kasan_set_track+0x25/0x30 [ 33.454946] __kasan_slab_alloc+0x59/0x70 [ 33.455468] kmem_cache_alloc+0x16b/0x370 [ 33.455988] vm_area_dup+0x20/0x160 [ 33.456442] __split_vma+0x170/0x950 [ 33.456959] split_vma+0xc6/0x110 [ 33.457425] mprotect_fixup+0x8d2/0xb30 [ 33.457946] do_mprotect_pkey+0x87e/0xd40 [ 33.458476] __x64_sys_mprotect+0x78/0xc0 [ 33.459013] do_syscall_64+0x3f/0x90 [ 33.459489] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 33.460131] [ 33.460345] Freed by task 213: [ 33.460748] kasan_save_stack+0x22/0x50 [ 33.461256] kasan_set_track+0x25/0x30 [ 33.461750] kasan_save_free_info+0x2b/0x50 [ 33.462283] __kasan_slab_free+0x10a/0x190 [ 33.462823] kmem_cache_free+0x10d/0x4d0 [ 33.463333] rcu_core+0x8c8/0x2860 [ 33.463782] __do_softirq+0x1b7/0x7d4 [ 33.464325] [ 33.464561] Last potentially related work creation: [ 33.465145] kasan_save_stack+0x22/0x50 [ 33.465675] __kasan_record_aux_stack+0x8e/0xa0 [ 33.466255] __call_rcu_common.constprop.0+0x6a/0xb90 [ 33.466900] remove_vma+0x139/0x170 [ 33.467365] do_vmi_align_munmap+0xd4a/0x11f0 [ 33.467931] do_vmi_munmap+0x1f1/0x2b0 [ 33.468425] __vm_munmap+0x138/0x3a0 [ 33.468907] __x64_sys_munmap+0x59/0x80 [ 33.469407] do_syscall_64+0x3f/0x90 [ 33.469894] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 33.470549] [ 33.470773] The buggy address belongs to the object at ffff888015fce0e8 [ 33.470773] which belongs to the cache vm_area_struct of size 168 [ 33.472250] The buggy address is located 88 bytes inside of [ 33.472250] freed 168-byte region [ffff888015fce0e8, ffff888015fce190) [ 33.473709] [ 33.473928] The buggy address belongs to the physical page: [ 33.474591] page:00000000929c3f02 refcount:1 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0x15fce [ 33.475688] memcg:ffff888014737101 [ 33.476131] flags: 0x100000000000200(slab|node=0|zone=1) [ 33.476797] page_type: 0xffffffff() [ 33.477282] raw: 0100000000000200 ffff88800879fc80 dead000000000122 0000000000000000 [ 33.478239] raw: 0000000000000000 0000000000110011 00000001ffffffff ffff888014737101 [ 33.479152] page dumped because: kasan: bad access detected [ 33.479814] [ 33.480031] Memory state around the buggy address: [ 33.480624] ffff888015fce000: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 [ 33.481495] ffff888015fce080: 00 00 00 00 00 fc fc fc fc fc fc fc fc fa fb fb [ 33.482364] >ffff888015fce100: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb [ 33.483224] ^ [ 33.483899] ffff888015fce180: fb fb fc fc fc fc fc fc fc fc fa fb fb fb fb fb [ 33.484786] ffff888015fce200: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fc [ 33.485675] ================================================================== [ 33.486630] Disabling lock debugging due to kernel taint [ 35.425563] BUG: Bad rss-counter state mm:000000002b5a57d9 type:MM_FILEPAGES val:33 [ 35.426506] BUG: Bad rss-counter state mm:000000002b5a57d9 type:MM_ANONPAGES val:22 [ 35.899263] BUG: Bad rss-counter state mm:0000000082157300 type:MM_FILEPAGES val:33 [ 35.900436] BUG: Bad rss-counter state mm:0000000082157300 type:MM_ANONPAGES val:22 Warning: Permanently added '[localhost]:61740' (ECDSA) to the list of known hosts. 2023/06/20 03:30:46 fuzzer started 2023/06/20 03:30:46 dialing manager at localhost:44161 2023/06/20 03:30:46 checking machine... 2023/06/20 03:30:46 checking revisions... [ 36.476725] kmemleak: Automatic memory scanning thread ended 2023/06/20 03:30:46 testing simple program... [ 36.515323] cgroup: Unknown subsys name 'net' [ 36.549479] cgroup: Unknown subsys name 'rlimit' executing program executing program executing program VM DIAGNOSIS: 03:30:43 Registers: info registers vcpu 0 RAX=0000000000000029 RBX=0000000000000000 RCX=0000000000000000 RDX=0000000000000000 RSI=0000000000000029 RDI=ffff88800eb2ff58 RBP=0000000000000000 RSP=ffff88800eb2ff50 R8 =0000000000000000 R9 =0000000000000000 R10=0000000000000000 R11=0000000000000000 R12=0000000000000000 R13=0000000000000000 R14=0000000000000000 R15=0000000000000000 RIP=ffffffff84532a40 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 00007f92dbdd2900 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=00007f92dc389618 CR3=000000000c75a000 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=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=00007f9271ddfc60 CR3=000000000c640000 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=d1cb92d8bd80c98fd34994e38bab30bf XMM02=000000000011e200eff9b2d0a8fce9cb XMM03=000000000011e2d02c67c8bc2e329bc3 XMM04=ee1de1bb44b13b6e00000000000ae988 XMM05=81e5ff216485ad570000000000135150 XMM06=4fda316b135da52b00000000001341f0 XMM07=e042d86d42eb936e0000000000124a88 XMM08=74ad81a8f6874807000000000011e2d0 XMM09=00000000000000000000000000000000 XMM10=20200000000020202020202020200000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000