syzkaller login: [ 33.569387] BUG: Bad rss-counter state mm:0000000041b5a995 type:MM_FILEPAGES val:33 [ 33.570819] BUG: Bad rss-counter state mm:0000000041b5a995 type:MM_ANONPAGES val:22 [ 33.609293] ================================================================== [ 33.610342] BUG: KASAN: slab-use-after-free in vma_interval_tree_remove+0xc75/0xec0 [ 33.611471] Read of size 8 at addr ffff8880174bc3f8 by task sshd/221 [ 33.612384] [ 33.612602] CPU: 1 PID: 221 Comm: sshd Not tainted 6.4.0-rc7-next-20230619 #1 [ 33.613555] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS 1.12.0-1 04/01/2014 [ 33.614721] Call Trace: [ 33.615085] [ 33.615399] dump_stack_lvl+0x91/0xf0 [ 33.616000] print_report+0xcc/0x620 [ 33.616489] ? __virt_addr_valid+0x102/0x340 [ 33.617234] ? vma_interval_tree_remove+0xc75/0xec0 [ 33.617854] ? vma_interval_tree_remove+0xc75/0xec0 [ 33.618471] kasan_report+0xbe/0xf0 [ 33.618952] ? vma_interval_tree_remove+0xc75/0xec0 [ 33.619571] vma_interval_tree_remove+0xc75/0xec0 [ 33.620189] vma_prepare+0xc54/0x11a0 [ 33.620667] __split_vma+0x5af/0x950 [ 33.621148] ? __pfx___split_vma+0x10/0x10 [ 33.621680] ? find_held_lock+0x2c/0x110 [ 33.622198] do_vmi_align_munmap+0x2ba/0x11f0 [ 33.622757] ? lock_is_held_type+0x9f/0x120 [ 33.623292] ? __pfx_do_vmi_align_munmap+0x10/0x10 [ 33.623901] ? mtree_range_walk+0x632/0x900 [ 33.624460] ? mas_walk+0x5c7/0x7c0 [ 33.624938] do_vmi_munmap+0x1f1/0x2b0 [ 33.625430] mmap_region+0x1f9/0x2660 [ 33.625918] ? vm_mmap_pgoff+0x15c/0x3a0 [ 33.626428] ? __pfx_arch_get_unmapped_area_topdown+0x10/0x10 [ 33.627144] ? __pfx_lock_acquire+0x10/0x10 [ 33.627681] ? __pfx_mmap_region+0x10/0x10 [ 33.628214] ? security_mmap_addr+0x7d/0xa0 [ 33.628751] ? get_unmapped_area+0x1f5/0x3f0 [ 33.629302] do_mmap+0x854/0xf00 [ 33.629745] vm_mmap_pgoff+0x1a6/0x3a0 [ 33.630240] ? __pfx_vm_mmap_pgoff+0x10/0x10 [ 33.630802] ksys_mmap_pgoff+0x3af/0x500 [ 33.631309] do_syscall_64+0x3f/0x90 [ 33.631811] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 33.632459] RIP: 0033:0x7f546827fd82 [ 33.632917] 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 [ 33.635045] RSP: 002b:00007ffe0d4deb58 EFLAGS: 00000206 ORIG_RAX: 0000000000000009 [ 33.635954] RAX: ffffffffffffffda RBX: 0000000000000812 RCX: 00007f546827fd82 [ 33.636795] RDX: 0000000000000005 RSI: 0000000000001000 RDI: 00007f54676b9000 [ 33.637642] RBP: 00007f54676b9000 R08: 0000000000000009 R09: 0000000000001000 [ 33.638489] R10: 0000000000000812 R11: 0000000000000206 R12: 000055b60f0ccb20 [ 33.639330] R13: 00007ffe0d4deb70 R14: 00007ffe0d4deba0 R15: 00007ffe0d4def00 [ 33.640199] [ 33.640493] [ 33.640713] Allocated by task 214: [ 33.641153] kasan_save_stack+0x22/0x50 [ 33.641666] kasan_set_track+0x25/0x30 [ 33.642162] __kasan_slab_alloc+0x59/0x70 [ 33.642684] kmem_cache_alloc+0x16b/0x370 [ 33.643205] vm_area_dup+0x20/0x160 [ 33.643680] __split_vma+0x170/0x950 [ 33.644149] split_vma+0xc6/0x110 [ 33.644602] mprotect_fixup+0x8d2/0xb30 [ 33.645106] do_mprotect_pkey+0x87e/0xd40 [ 33.645627] __x64_sys_mprotect+0x78/0xc0 [ 33.646153] do_syscall_64+0x3f/0x90 [ 33.646630] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 33.647283] [ 33.647501] Freed by task 214: [ 33.647902] kasan_save_stack+0x22/0x50 [ 33.648406] kasan_set_track+0x25/0x30 [ 33.648903] kasan_save_free_info+0x2b/0x50 [ 33.649429] __kasan_slab_free+0x10a/0x190 [ 33.649965] kmem_cache_free+0x10d/0x4d0 [ 33.650474] rcu_core+0x8c8/0x2860 [ 33.650920] __do_softirq+0x1b7/0x7d4 [ 33.651393] [ 33.651610] Last potentially related work creation: [ 33.652203] kasan_save_stack+0x22/0x50 [ 33.652712] __kasan_record_aux_stack+0x8e/0xa0 [ 33.653288] __call_rcu_common.constprop.0+0x6a/0xb90 [ 33.653931] remove_vma+0x139/0x170 [ 33.654465] do_vmi_align_munmap+0xd4a/0x11f0 [ 33.655029] do_vmi_munmap+0x1f1/0x2b0 [ 33.655520] __vm_munmap+0x138/0x3a0 [ 33.656008] __x64_sys_munmap+0x59/0x80 [ 33.656508] do_syscall_64+0x3f/0x90 [ 33.656989] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 33.657637] [ 33.657855] The buggy address belongs to the object at ffff8880174bc3a0 [ 33.657855] which belongs to the cache vm_area_struct of size 168 [ 33.659321] The buggy address is located 88 bytes inside of [ 33.659321] freed 168-byte region [ffff8880174bc3a0, ffff8880174bc448) [ 33.660737] [ 33.660953] The buggy address belongs to the physical page: [ 33.661613] page:00000000a58c9ff7 refcount:1 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0x174bc [ 33.662709] memcg:ffff88800e930201 [ 33.663152] flags: 0x100000000000200(slab|node=0|zone=1) [ 33.663817] page_type: 0xffffffff() [ 33.664277] raw: 0100000000000200 ffff88800879fc80 dead000000000122 0000000000000000 [ 33.665203] raw: 0000000000000000 0000000000110011 00000001ffffffff ffff88800e930201 [ 33.666115] page dumped because: kasan: bad access detected [ 33.666768] [ 33.666985] Memory state around the buggy address: [ 33.667570] ffff8880174bc280: fc fc fc fc fc fc fc 00 00 00 00 00 00 00 00 00 [ 33.668437] ffff8880174bc300: 00 00 00 00 00 00 00 00 00 00 00 00 fc fc fc fc [ 33.669296] >ffff8880174bc380: fc fc fc fc fa fb fb fb fb fb fb fb fb fb fb fb [ 33.670138] ^ [ 33.670978] ffff8880174bc400: fb fb fb fb fb fb fb fb fb fc fc fc fc fc fc fc [ 33.671836] ffff8880174bc480: fc fa fb fb fb fb fb fb fb fb fb fb fb fb fb fb [ 33.672682] ================================================================== [ 33.673696] Disabling lock debugging due to kernel taint [ 36.650093] BUG: Bad rss-counter state mm:000000004bee938d type:MM_FILEPAGES val:33 [ 36.651290] BUG: Bad rss-counter state mm:000000004bee938d type:MM_ANONPAGES val:22 [ 37.032677] BUG: Bad rss-counter state mm:000000002cb8ed49 type:MM_FILEPAGES val:33 [ 37.033670] BUG: Bad rss-counter state mm:000000002cb8ed49 type:MM_ANONPAGES val:22 Warning: Permanently added '[localhost]:13825' (ECDSA) to the list of known hosts. 2023/06/20 05:44:32 fuzzer started 2023/06/20 05:44:32 dialing manager at localhost:44161 2023/06/20 05:44:32 checking machine... 2023/06/20 05:44:32 checking revisions... [ 37.733332] kmemleak: Automatic memory scanning thread ended 2023/06/20 05:44:32 testing simple program... [ 37.776659] cgroup: Unknown subsys name 'net' [ 37.814199] cgroup: Unknown subsys name 'rlimit' executing program executing program executing program VM DIAGNOSIS: 05:44:29 Registers: info registers vcpu 0 RAX=0000000000000000 RBX=ffff88806ce09a98 RCX=ffff88800fe68000 RDX=0000000000000001 RSI=0000000000000001 RDI=ffff88806ce09aa8 RBP=ffff88800fe673b0 RSP=ffff88806ce099f0 R8 =0000000000000000 R9 =ffff88806ce09ad8 R10=0000000000038001 R11=00000000000b523e R12=0000000000000008 R13=ffff88800fe60000 R14=ffff88800fe68000 R15=ffff88806ce09a98 RIP=ffffffff8113053f 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 00007fd058d04900 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=00007fd0592bb618 CR3=000000001bf04000 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=00007f7590dfd3b0 CR3=000000000d7de000 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=963e5cc1178761aae0430d0c10485bdc XMM02=2c67c8bc2e329bc3000000000011e878 XMM03=fb795ef6d65770560000000000125388 XMM04=5fbdd2a9a9dc84a100000000000ae988 XMM05=59d5b690e0af863b0000000000135208 XMM06=98bd7177f35e62b30000000000134070 XMM07=e042d86d42eb936e0000000000125608 XMM08=06e0555b78b15a45000000000011e8d8 XMM09=00000000000000000000000000000000 XMM10=00000000000000000000000000000000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000