syzkaller login: [ 23.806228] BUG: Bad rss-counter state mm:000000005c6dba98 type:MM_FILEPAGES val:33 [ 23.807501] BUG: Bad rss-counter state mm:000000005c6dba98 type:MM_ANONPAGES val:22 [ 23.848331] ================================================================== [ 23.849339] BUG: KASAN: slab-use-after-free in vma_interval_tree_remove+0xc75/0xec0 [ 23.850232] Read of size 8 at addr ffff888019ad8310 by task sshd/219 [ 23.850979] [ 23.851193] CPU: 1 PID: 219 Comm: sshd Not tainted 6.4.0-rc7-next-20230620 #1 [ 23.852018] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS 1.12.0-1 04/01/2014 [ 23.852961] Call Trace: [ 23.853266] [ 23.853543] dump_stack_lvl+0x91/0xf0 [ 23.854015] print_report+0xcc/0x620 [ 23.854473] ? __virt_addr_valid+0x102/0x340 [ 23.854996] ? vma_interval_tree_remove+0xc75/0xec0 [ 23.855592] ? vma_interval_tree_remove+0xc75/0xec0 [ 23.856203] kasan_report+0xbe/0xf0 [ 23.856666] ? vma_interval_tree_remove+0xc75/0xec0 [ 23.857264] vma_interval_tree_remove+0xc75/0xec0 [ 23.857839] vma_prepare+0xc54/0x11a0 [ 23.858294] __split_vma+0x5af/0x950 [ 23.858745] ? __pfx___split_vma+0x10/0x10 [ 23.859258] ? find_held_lock+0x2c/0x110 [ 23.859768] do_vmi_align_munmap+0x2ba/0x11f0 [ 23.860327] ? lock_is_held_type+0x9f/0x120 [ 23.860858] ? __pfx_do_vmi_align_munmap+0x10/0x10 [ 23.861423] ? mtree_range_walk+0x632/0x900 [ 23.861943] ? mas_walk+0x5c7/0x7c0 [ 23.862396] do_vmi_munmap+0x1f1/0x2b0 [ 23.862869] mmap_region+0x1f9/0x2660 [ 23.863324] ? vm_mmap_pgoff+0x15c/0x3a0 [ 23.863807] ? __pfx_arch_get_unmapped_area_topdown+0x10/0x10 [ 23.864487] ? __pfx_lock_acquire+0x10/0x10 [ 23.864988] ? __pfx_mmap_region+0x10/0x10 [ 23.865499] ? security_mmap_addr+0x7d/0xa0 [ 23.866023] ? get_unmapped_area+0x1f5/0x3f0 [ 23.866565] do_mmap+0x854/0xf00 [ 23.867001] vm_mmap_pgoff+0x1a6/0x3a0 [ 23.867484] ? __pfx_vm_mmap_pgoff+0x10/0x10 [ 23.868029] ksys_mmap_pgoff+0x3af/0x500 [ 23.868552] do_syscall_64+0x3f/0x90 [ 23.869026] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 23.869660] RIP: 0033:0x7fab077fad82 [ 23.870101] 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 [ 23.872190] RSP: 002b:00007ffd6747adf8 EFLAGS: 00000206 ORIG_RAX: 0000000000000009 [ 23.873265] RAX: ffffffffffffffda RBX: 0000000000000812 RCX: 00007fab077fad82 [ 23.874094] RDX: 0000000000000005 RSI: 0000000000001000 RDI: 00007fab06c34000 [ 23.874929] RBP: 00007fab06c34000 R08: 0000000000000009 R09: 0000000000001000 [ 23.875762] R10: 0000000000000812 R11: 0000000000000206 R12: 0000558581a8ff70 [ 23.876610] R13: 00007ffd6747ae10 R14: 00007ffd6747ae40 R15: 00007ffd6747b1a0 [ 23.877449] [ 23.877737] [ 23.877953] Allocated by task 212: [ 23.878372] kasan_save_stack+0x22/0x50 [ 23.878866] kasan_set_track+0x25/0x30 [ 23.879347] __kasan_slab_alloc+0x59/0x70 [ 23.879864] kmem_cache_alloc+0x16b/0x370 [ 23.880371] vm_area_dup+0x20/0x160 [ 23.880811] __split_vma+0x170/0x950 [ 23.881264] split_vma+0xc6/0x110 [ 23.881697] mprotect_fixup+0x8d2/0xb30 [ 23.882186] do_mprotect_pkey+0x87e/0xd40 [ 23.882694] __x64_sys_mprotect+0x78/0xc0 [ 23.883202] do_syscall_64+0x3f/0x90 [ 23.883668] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 23.884297] [ 23.884513] Freed by task 203: [ 23.884907] kasan_save_stack+0x22/0x50 [ 23.885402] kasan_set_track+0x25/0x30 [ 23.885886] kasan_save_free_info+0x2b/0x50 [ 23.886404] __kasan_slab_free+0x10a/0x190 [ 23.886922] kmem_cache_free+0x10d/0x4d0 [ 23.887416] rcu_core+0x8c8/0x2860 [ 23.887859] __do_softirq+0x1b7/0x7d4 [ 23.888333] [ 23.888545] Last potentially related work creation: [ 23.889122] kasan_save_stack+0x22/0x50 [ 23.889618] __kasan_record_aux_stack+0x8e/0xa0 [ 23.890177] __call_rcu_common.constprop.0+0x6a/0xb90 [ 23.890812] remove_vma+0x139/0x170 [ 23.891256] do_vmi_align_munmap+0xd4a/0x11f0 [ 23.891801] do_vmi_munmap+0x1f1/0x2b0 [ 23.892287] __vm_munmap+0x138/0x3a0 [ 23.892749] __x64_sys_munmap+0x59/0x80 [ 23.893225] do_syscall_64+0x3f/0x90 [ 23.893737] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 23.894362] [ 23.894573] The buggy address belongs to the object at ffff888019ad82b8 [ 23.894573] which belongs to the cache vm_area_struct of size 168 [ 23.896017] The buggy address is located 88 bytes inside of [ 23.896017] freed 168-byte region [ffff888019ad82b8, ffff888019ad8360) [ 23.897429] [ 23.897641] The buggy address belongs to the physical page: [ 23.898278] page:00000000e1b85649 refcount:1 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0x19ad8 [ 23.899360] memcg:ffff88800fd63601 [ 23.899783] flags: 0x100000000000200(slab|node=0|zone=1) [ 23.900444] page_type: 0xffffffff() [ 23.900889] raw: 0100000000000200 ffff8880087a0c80 dead000000000122 0000000000000000 [ 23.901798] raw: 0000000000000000 0000000000110011 00000001ffffffff ffff88800fd63601 [ 23.902691] page dumped because: kasan: bad access detected [ 23.903333] [ 23.903542] Memory state around the buggy address: [ 23.904113] ffff888019ad8200: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 fc [ 23.904961] ffff888019ad8280: fc fc fc fc fc fc fc fa fb fb fb fb fb fb fb fb [ 23.905804] >ffff888019ad8300: fb fb fb fb fb fb fb fb fb fb fb fb fc fc fc fc [ 23.906643] ^ [ 23.907102] ffff888019ad8380: fc fc fc fc fa fb fb fb fb fb fb fb fb fb fb fb [ 23.907936] ffff888019ad8400: fb fb fb fb fb fb fb fb fb fc fc fc fc fc fc fc [ 23.908792] ================================================================== [ 23.909792] Disabling lock debugging due to kernel taint [ 25.911160] BUG: Bad rss-counter state mm:00000000148b4aec type:MM_FILEPAGES val:33 [ 25.912344] BUG: Bad rss-counter state mm:00000000148b4aec type:MM_ANONPAGES val:22 [ 26.319037] BUG: Bad rss-counter state mm:0000000070d86faf type:MM_FILEPAGES val:33 [ 26.320358] BUG: Bad rss-counter state mm:0000000070d86faf type:MM_ANONPAGES val:22 Warning: Permanently added '[localhost]:41744' (ECDSA) to the list of known hosts. 2023/06/20 20:33:56 fuzzer started 2023/06/20 20:33:57 dialing manager at localhost:36067 2023/06/20 20:33:57 checking machine... 2023/06/20 20:33:57 checking revisions... [ 27.012966] kmemleak: Automatic memory scanning thread ended 2023/06/20 20:33:57 testing simple program... [ 27.061418] cgroup: Unknown subsys name 'net' [ 27.099816] cgroup: Unknown subsys name 'rlimit' executing program executing program executing program VM DIAGNOSIS: 20:33:56 Registers: info registers vcpu 0 RAX=ffffffff81132ffe RBX=0000000000000001 RCX=ffff88800b82f4b0 RDX=ffff88800b82f458 RSI=1ffff11001705e84 RDI=ffff88800b82f410 RBP=ffff88800b82f468 RSP=ffff88800b82f350 R8 =0000000000000000 R9 =0000000000000000 R10=ffff88800b82f410 R11=00000000000b6a61 R12=ffffed1001705e84 R13=ffff88800b82f458 R14=ffff88800b82f458 R15=ffff88800b82f410 RIP=ffffffff81130641 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 00007f47da591900 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=00007f47dab48618 CR3=000000000f16a000 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=0000000000000000 RBX=0000000000000002 RCX=ffffffff86139744 RDX=1ffff1100d9e1353 RSI=0000000000000000 RDI=0000000000000001 RBP=ffff88806cf09af0 RSP=ffff88806cf09a28 R8 =ffffffff86139748 R9 =ffff88806cf09ad8 R10=0000000000038001 R11=0000000000020f03 R12=ffff88806cf09af8 R13=ffff88806cf09ae0 R14=ffff88806cf09e08 R15=ffff88806cf09a98 RIP=ffffffff81131271 RFL=00000216 [----AP-] 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 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=00007f3916e4a200 CR3=000000000d874000 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=e50f4032411a858ae241f6f475918b3b XMM02=2c67c8bc2e329bc3000000000011b0d8 XMM03=fb795ef6d657705600000000001213c0 XMM04=e194e166fdfd09af00000000000ae988 XMM05=dfcdbad4f1609c370000000000131228 XMM06=e2aedeb99603398f0000000000130400 XMM07=e042d86d42eb936e0000000000121640 XMM08=32b35dbacef2448c000000000011b138 XMM09=00000000000000000000000000000000 XMM10=00000000000000000000000000000000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000