VFS: Found a Xenix FS (block size = 512) on device loop3 BUG: sleeping function called from invalid context at fs/buffer.c:1381 in_atomic(): 1, irqs_disabled(): 0, pid: 9692, name: syz-executor.3 3 locks held by syz-executor.3/9692: #0: (sb_writers#13){.+.+}, at: [] sb_start_write include/linux/fs.h:1551 [inline] #0: (sb_writers#13){.+.+}, at: [] mnt_want_write+0x3a/0xb0 fs/namespace.c:386 #1: (&sb->s_type->i_mutex_key#21){+.+.}, at: [] inode_lock include/linux/fs.h:719 [inline] #1: (&sb->s_type->i_mutex_key#21){+.+.}, at: [] do_truncate+0xf0/0x1a0 fs/open.c:61 #2: (pointers_lock){.+.+}, at: [] get_block+0x153/0x1230 fs/sysv/itree.c:217 Preemption disabled at: [< (null)>] (null) CPU: 1 PID: 9692 Comm: syz-executor.3 Not tainted 4.14.302-syzkaller #0 Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 10/26/2022 Call Trace: __dump_stack lib/dump_stack.c:17 [inline] dump_stack+0x1b2/0x281 lib/dump_stack.c:58 ___might_sleep.cold+0x235/0x250 kernel/sched/core.c:6041 __getblk_gfp fs/buffer.c:1381 [inline] __bread_gfp+0x3e/0x2e0 fs/buffer.c:1428 sb_bread include/linux/buffer_head.h:343 [inline] get_branch+0x2ac/0x600 fs/sysv/itree.c:104 get_block+0x176/0x1230 fs/sysv/itree.c:218 block_truncate_page+0x2a8/0x8f0 fs/buffer.c:2944 sysv_truncate+0x1c4/0xd70 fs/sysv/itree.c:383 sysv_setattr+0x115/0x180 fs/sysv/file.c:47 notify_change+0x56b/0xd10 fs/attr.c:315 do_truncate+0xff/0x1a0 fs/open.c:63 vfs_truncate+0x456/0x680 fs/open.c:120 do_sys_truncate.part.0+0xdc/0xf0 fs/open.c:143 do_sys_truncate fs/open.c:137 [inline] SYSC_truncate fs/open.c:155 [inline] SyS_truncate+0x23/0x40 fs/open.c:153 do_syscall_64+0x1d5/0x640 arch/x86/entry/common.c:292 entry_SYSCALL_64_after_hwframe+0x5e/0xd3 RIP: 0033:0x7f83196a90d9 RSP: 002b:00007f8317c1b168 EFLAGS: 00000246 ORIG_RAX: 000000000000004c RAX: ffffffffffffffda RBX: 00007f83197c8f80 RCX: 00007f83196a90d9 RDX: 0000000000000000 RSI: 0000000000008001 RDI: 000000002000a340 RBP: 00007f8319704ae9 R08: 0000000000000000 R09: 0000000000000000 R10: 0000000000000000 R11: 0000000000000246 R12: 0000000000000000 R13: 00007fff9bf2a78f R14: 00007f8317c1b300 R15: 0000000000022000 hrtimer: interrupt took 25261 ns VFS: Found a Xenix FS (block size = 512) on device loop3 VFS: Found a Xenix FS (block size = 512) on device loop3 BUG: sleeping function called from invalid context at fs/buffer.c:1381 in_atomic(): 1, irqs_disabled(): 0, pid: 9768, name: syz-executor.3 3 locks held by syz-executor.3/9768: #0: (sb_writers#13){.+.+}, at: [] sb_start_write include/linux/fs.h:1551 [inline] #0: (sb_writers#13){.+.+}, at: [] mnt_want_write+0x3a/0xb0 fs/namespace.c:386 #1: (&sb->s_type->i_mutex_key#21){+.+.}, at: [] inode_lock include/linux/fs.h:719 [inline] #1: (&sb->s_type->i_mutex_key#21){+.+.}, at: [] do_truncate+0xf0/0x1a0 fs/open.c:61 #2: (pointers_lock){++++}, at: [] get_block+0x153/0x1230 fs/sysv/itree.c:217 Preemption disabled at: [< (null)>] (null) CPU: 1 PID: 9768 Comm: syz-executor.3 Tainted: G W 4.14.302-syzkaller #0 Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 10/26/2022 Call Trace: __dump_stack lib/dump_stack.c:17 [inline] dump_stack+0x1b2/0x281 lib/dump_stack.c:58 ___might_sleep.cold+0x235/0x250 kernel/sched/core.c:6041 __getblk_gfp fs/buffer.c:1381 [inline] __bread_gfp+0x3e/0x2e0 fs/buffer.c:1428 sb_bread include/linux/buffer_head.h:343 [inline] get_branch+0x2ac/0x600 fs/sysv/itree.c:104 get_block+0x176/0x1230 fs/sysv/itree.c:218 block_truncate_page+0x2a8/0x8f0 fs/buffer.c:2944 sysv_truncate+0x1c4/0xd70 fs/sysv/itree.c:383 sysv_setattr+0x115/0x180 fs/sysv/file.c:47 notify_change+0x56b/0xd10 fs/attr.c:315 do_truncate+0xff/0x1a0 fs/open.c:63 vfs_truncate+0x456/0x680 fs/open.c:120 do_sys_truncate.part.0+0xdc/0xf0 fs/open.c:143 do_sys_truncate fs/open.c:137 [inline] SYSC_truncate fs/open.c:155 [inline] SyS_truncate+0x23/0x40 fs/open.c:153 do_syscall_64+0x1d5/0x640 arch/x86/entry/common.c:292 entry_SYSCALL_64_after_hwframe+0x5e/0xd3 RIP: 0033:0x7f83196a90d9 RSP: 002b:00007f8317c1b168 EFLAGS: 00000246 ORIG_RAX: 000000000000004c RAX: ffffffffffffffda RBX: 00007f83197c8f80 RCX: 00007f83196a90d9 RDX: 0000000000000000 RSI: 0000000000008001 RDI: 000000002000a340 RBP: 00007f8319704ae9 R08: 0000000000000000 R09: 0000000000000000 R10: 0000000000000000 R11: 0000000000000246 R12: 0000000000000000 R13: 00007fff9bf2a78f R14: 00007f8317c1b300 R15: 0000000000022000 VFS: Found a Xenix FS (block size = 512) on device loop3 bridge0: port 2(bridge_slave_1) entered disabled state bridge0: port 1(bridge_slave_0) entered disabled state device bridge0 entered promiscuous mode device bridge_slave_1 left promiscuous mode bridge0: port 2(bridge_slave_1) entered disabled state device bridge_slave_0 left promiscuous mode bridge0: port 1(bridge_slave_0) entered disabled state netlink: 17060 bytes leftover after parsing attributes in process `syz-executor.0'. Zero length message leads to an empty skb batman_adv: The newly added mac address (aa:aa:aa:aa:aa:3e) already exists on: batadv_slave_0 batman_adv: It is strongly recommended to keep mac addresses unique to avoid problems! batman_adv: The newly added mac address (aa:aa:aa:aa:aa:3e) already exists on: batadv_slave_0 batman_adv: It is strongly recommended to keep mac addresses unique to avoid problems! batman_adv: The newly added mac address (aa:aa:aa:aa:aa:3e) already exists on: batadv_slave_0 netlink: 28 bytes leftover after parsing attributes in process `syz-executor.2'. batman_adv: It is strongly recommended to keep mac addresses unique to avoid problems! batman_adv: The newly added mac address (aa:aa:aa:aa:aa:3e) already exists on: batadv_slave_0 batman_adv: It is strongly recommended to keep mac addresses unique to avoid problems! batman_adv: The newly added mac address (aa:aa:aa:aa:aa:3e) already exists on: batadv_slave_0 batman_adv: It is strongly recommended to keep mac addresses unique to avoid problems! batman_adv: The newly added mac address (aa:aa:aa:aa:aa:3e) already exists on: batadv_slave_0 batman_adv: It is strongly recommended to keep mac addresses unique to avoid problems! netlink: 28 bytes leftover after parsing attributes in process `syz-executor.2'. batman_adv: batadv0: Interface deactivated: batadv_slave_0 batman_adv: batadv0: Interface deactivated: batadv_slave_1 netlink: 17060 bytes leftover after parsing attributes in process `syz-executor.1'. unregister_netdevice: waiting for ip6gre0 to become free. Usage count = -1