syz-executor.5: vmalloc error: size 9128, vm_struct allocation failed, mode:0xdc0(GFP_KERNEL|__GFP_ZERO), nodemask=(null),cpuset=syz5,mems_allowed=0-1 CPU: 1 PID: 8798 Comm: syz-executor.5 Not tainted 6.0.0-rc1-next-20220819-syzkaller #0 BUG: sleeping function called from invalid context at kernel/locking/rwsem.c:1521 in_atomic(): 0, irqs_disabled(): 1, non_block: 0, pid: 8798, name: syz-executor.5 preempt_count: 0, expected: 0 RCU nest depth: 0, expected: 0 2 locks held by syz-executor.5/8798: #0: ffff888021e011c0 (&tty->legacy_mutex){+.+.}-{3:3}, at: tty_lock+0xbd/0x120 drivers/tty/tty_mutex.c:20 #1: ffff888021e01098 (&tty->ldisc_sem){++++}-{0:0}, at: __tty_ldisc_lock drivers/tty/tty_ldisc.c:290 [inline] #1: ffff888021e01098 (&tty->ldisc_sem){++++}-{0:0}, at: tty_ldisc_lock+0x61/0xb0 drivers/tty/tty_ldisc.c:314 irq event stamp: 3510 hardirqs last enabled at (3509): [] raw_spin_rq_unlock_irq kernel/sched/sched.h:1352 [inline] hardirqs last enabled at (3509): [] finish_lock_switch kernel/sched/core.c:4956 [inline] hardirqs last enabled at (3509): [] finish_task_switch.isra.0+0x2b5/0xc70 kernel/sched/core.c:5074 hardirqs last disabled at (3510): [] dump_stack_lvl+0x2e/0x134 lib/dump_stack.c:139 softirqs last enabled at (3502): [] invoke_softirq kernel/softirq.c:445 [inline] softirqs last enabled at (3502): [] __irq_exit_rcu+0x123/0x180 kernel/softirq.c:650 softirqs last disabled at (3477): [] invoke_softirq kernel/softirq.c:445 [inline] softirqs last disabled at (3477): [] __irq_exit_rcu+0x123/0x180 kernel/softirq.c:650 CPU: 1 PID: 8798 Comm: syz-executor.5 Not tainted 6.0.0-rc1-next-20220819-syzkaller #0 syz-executor.5[8798] cmdline: /root/syz-executor.5 exec Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 07/22/2022 Call Trace: __dump_stack lib/dump_stack.c:122 [inline] dump_stack_lvl+0xcd/0x134 lib/dump_stack.c:140 __might_resched.cold+0x222/0x26b kernel/sched/core.c:9896 down_read_killable+0x75/0x490 kernel/locking/rwsem.c:1521 mmap_read_lock_killable include/linux/mmap_lock.h:126 [inline] __access_remote_vm+0xac/0x6f0 mm/memory.c:5461 get_mm_cmdline.part.0+0x217/0x620 fs/proc/base.c:299 get_mm_cmdline fs/proc/base.c:367 [inline] get_task_cmdline_kernel+0x1d9/0x220 fs/proc/base.c:367 dump_stack_print_cmdline.part.0+0x82/0x150 lib/dump_stack.c:61 dump_stack_print_cmdline lib/dump_stack.c:89 [inline] dump_stack_print_info+0x185/0x190 lib/dump_stack.c:97 __dump_stack lib/dump_stack.c:121 [inline] dump_stack_lvl+0xc1/0x134 lib/dump_stack.c:140 warn_alloc.cold+0x9b/0x189 mm/page_alloc.c:4356 __vmalloc_node_range+0xdf5/0x13a0 mm/vmalloc.c:3161 __vmalloc_node mm/vmalloc.c:3261 [inline] vzalloc+0x67/0x80 mm/vmalloc.c:3334 n_tty_open+0x16/0x170 drivers/tty/n_tty.c:1879 tty_ldisc_open+0x9b/0x110 drivers/tty/tty_ldisc.c:433 tty_set_ldisc+0x2f1/0x680 drivers/tty/tty_ldisc.c:558 tiocsetd drivers/tty/tty_io.c:2433 [inline] tty_ioctl+0xe20/0x15d0 drivers/tty/tty_io.c:2714 vfs_ioctl fs/ioctl.c:51 [inline] __do_sys_ioctl fs/ioctl.c:870 [inline] __se_sys_ioctl fs/ioctl.c:856 [inline] __x64_sys_ioctl+0x193/0x200 fs/ioctl.c:856 do_syscall_x64 arch/x86/entry/common.c:50 [inline] do_syscall_64+0x35/0xb0 arch/x86/entry/common.c:80 entry_SYSCALL_64_after_hwframe+0x63/0xcd RIP: 0033:0x7f3e3a089279 Code: ff ff c3 66 2e 0f 1f 84 00 00 00 00 00 0f 1f 40 00 48 89 f8 48 89 f7 48 89 d6 48 89 ca 4d 89 c2 4d 89 c8 4c 8b 4c 24 08 0f 05 <48> 3d 01 f0 ff ff 73 01 c3 48 c7 c1 b8 ff ff ff f7 d8 64 89 01 48 RSP: 002b:00007f3e3b1f0168 EFLAGS: 00000246 ORIG_RAX: 0000000000000010 RAX: ffffffffffffffda RBX: 00007f3e3a19bf80 RCX: 00007f3e3a089279 RDX: 0000000020000040 RSI: 0000000000005423 RDI: 0000000000000004 RBP: 00007f3e3b1f01d0 R08: 0000000000000000 R09: 0000000000000000 R10: 0000000000000000 R11: 0000000000000246 R12: 0000000000000001 R13: 00007ffded97e68f R14: 00007f3e3b1f0300 R15: 0000000000022000 syz-executor.5[8798] cmdline: /root/syz-executor.5 exec Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 07/22/2022 Call Trace: __dump_stack lib/dump_stack.c:122 [inline] dump_stack_lvl+0xcd/0x134 lib/dump_stack.c:140 warn_alloc.cold+0x9b/0x189 mm/page_alloc.c:4356 __vmalloc_node_range+0xdf5/0x13a0 mm/vmalloc.c:3161 __vmalloc_node mm/vmalloc.c:3261 [inline] vzalloc+0x67/0x80 mm/vmalloc.c:3334 n_tty_open+0x16/0x170 drivers/tty/n_tty.c:1879 tty_ldisc_open+0x9b/0x110 drivers/tty/tty_ldisc.c:433 tty_set_ldisc+0x2f1/0x680 drivers/tty/tty_ldisc.c:558 tiocsetd drivers/tty/tty_io.c:2433 [inline] tty_ioctl+0xe20/0x15d0 drivers/tty/tty_io.c:2714 vfs_ioctl fs/ioctl.c:51 [inline] __do_sys_ioctl fs/ioctl.c:870 [inline] __se_sys_ioctl fs/ioctl.c:856 [inline] __x64_sys_ioctl+0x193/0x200 fs/ioctl.c:856 do_syscall_x64 arch/x86/entry/common.c:50 [inline] do_syscall_64+0x35/0xb0 arch/x86/entry/common.c:80 entry_SYSCALL_64_after_hwframe+0x63/0xcd RIP: 0033:0x7f3e3a089279 Code: ff ff c3 66 2e 0f 1f 84 00 00 00 00 00 0f 1f 40 00 48 89 f8 48 89 f7 48 89 d6 48 89 ca 4d 89 c2 4d 89 c8 4c 8b 4c 24 08 0f 05 <48> 3d 01 f0 ff ff 73 01 c3 48 c7 c1 b8 ff ff ff f7 d8 64 89 01 48 RSP: 002b:00007f3e3b1f0168 EFLAGS: 00000246 ORIG_RAX: 0000000000000010 RAX: ffffffffffffffda RBX: 00007f3e3a19bf80 RCX: 00007f3e3a089279 RDX: 0000000020000040 RSI: 0000000000005423 RDI: 0000000000000004 RBP: 00007f3e3b1f01d0 R08: 0000000000000000 R09: 0000000000000000 R10: 0000000000000000 R11: 0000000000000246 R12: 0000000000000001 R13: 00007ffded97e68f R14: 00007f3e3b1f0300 R15: 0000000000022000 Mem-Info: active_anon:473 inactive_anon:216740 isolated_anon:0 active_file:11517 inactive_file:553 isolated_file:0 unevictable:768 dirty:597 writeback:0 slab_reclaimable:19746 slab_unreclaimable:96556 mapped:18604 shmem:1523 pagetables:971 bounce:0 kernel_misc_reclaimable:0 free:1217113 free_pcp:12788 free_cma:0 Node 0 active_anon:1892kB inactive_anon:866760kB active_file:45396kB inactive_file:2112kB unevictable:1536kB isolated(anon):0kB isolated(file):0kB mapped:73416kB dirty:1584kB writeback:0kB shmem:4556kB shmem_thp: 0kB shmem_pmdmapped: 0kB anon_thp: 55296kB writeback_tmp:0kB kernel_stack:10280kB pagetables:3780kB all_unreclaimable? no Node 1 active_anon:0kB inactive_anon:0kB active_file:72kB inactive_file:0kB unevictable:1536kB isolated(anon):0kB isolated(file):0kB mapped:0kB dirty:4kB writeback:0kB shmem:1536kB shmem_thp: 0kB shmem_pmdmapped: 0kB anon_thp: 0kB writeback_tmp:0kB kernel_stack:16kB pagetables:4kB all_unreclaimable? no Node 0 DMA free:15360kB boost:0kB min:200kB low:248kB high:296kB reserved_highatomic:0KB active_anon:0kB inactive_anon:0kB active_file:0kB inactive_file:0kB unevictable:0kB writepending:0kB present:15992kB managed:15360kB mlocked:0kB bounce:0kB free_pcp:0kB local_pcp:0kB free_cma:0kB lowmem_reserve[]: 0 2631 2632 2632 2632 Node 0 DMA32 free:921888kB boost:0kB min:35556kB low:44444kB high:53332kB reserved_highatomic:0KB active_anon:1888kB inactive_anon:866628kB active_file:43228kB inactive_file:2212kB unevictable:1536kB writepending:264kB present:3129332kB managed:2699792kB mlocked:0kB bounce:0kB free_pcp:31744kB local_pcp:12404kB free_cma:0kB lowmem_reserve[]: 0 0 0 0 0 Node 0 Normal free:8kB boost:0kB min:12kB low:12kB high:12kB reserved_highatomic:0KB active_anon:4kB inactive_anon:32kB active_file:868kB inactive_file:0kB unevictable:0kB writepending:20kB present:1048576kB managed:912kB mlocked:0kB bounce:0kB free_pcp:0kB local_pcp:0kB free_cma:0kB lowmem_reserve[]: 0 0 0 0 0 Node 1 Normal free:3931328kB boost:0kB min:54336kB low:67920kB high:81504kB reserved_highatomic:0KB active_anon:0kB inactive_anon:0kB active_file:72kB inactive_file:0kB unevictable:1536kB writepending:4kB present:4194304kB managed:4117620kB mlocked:0kB bounce:0kB free_pcp:22048kB local_pcp:10176kB free_cma:0kB lowmem_reserve[]: 0 0 0 0 0 Node 0 DMA: 0*4kB 0*8kB 0*16kB 0*32kB 0*64kB 0*128kB 0*256kB 0*512kB 1*1024kB (U) 1*2048kB (M) 3*4096kB (M) = 15360kB Node 0 DMA32: 0*4kB 1105*8kB (UE) 1694*16kB (UME) 280*32kB (UM) 215*64kB (UME) 144*128kB (UM) 142*256kB (UME) 127*512kB (UM) 97*1024kB (UME) 6*2048kB (UME) 154*4096kB (UM) = 920872kB Node 0 Normal: 0*4kB 1*8kB (M) 0*16kB 0*32kB 0*64kB 0*128kB 0*256kB 0*512kB 0*1024kB 0*2048kB 0*4096kB = 8kB Node 1 Normal: 184*4kB (UE) 46*8kB (UE) 27*16kB (UME) 32*32kB (UME) 27*64kB (UME) 12*128kB (UE) 2*256kB (UE) 2*512kB (UE) 2*1024kB (ME) 1*2048kB (E) 957*4096kB (M) = 3931328kB Node 0 hugepages_total=0 hugepages_free=0 hugepages_surp=0 hugepages_size=1048576kB Node 0 hugepages_total=2 hugepages_free=2 hugepages_surp=0 hugepages_size=2048kB Node 1 hugepages_total=0 hugepages_free=0 hugepages_surp=0 hugepages_size=1048576kB Node 1 hugepages_total=2 hugepages_free=2 hugepages_surp=0 hugepages_size=2048kB 13250 total pagecache pages 0 pages in swap cache Free swap = 0kB Total swap = 0kB 2097051 pages RAM 0 pages HighMem/MovableOnly 388630 pages reserved 0 pages cma reserved